diff options
Diffstat (limited to 'generic/tkCanvLine.c')
| -rw-r--r-- | generic/tkCanvLine.c | 1110 |
1 files changed, 554 insertions, 556 deletions
diff --git a/generic/tkCanvLine.c b/generic/tkCanvLine.c index 4c7b9be..cce3460 100644 --- a/generic/tkCanvLine.c +++ b/generic/tkCanvLine.c @@ -1,4 +1,4 @@ -/* +/* * tkCanvLine.c -- * * This file implements line items for canvas widgets. @@ -7,13 +7,12 @@ * Copyright (c) 1994-1997 Sun Microsystems, Inc. * Copyright (c) 1998-1999 by Scriptics Corporation. * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. + * See the file "license.terms" for information on usage and redistribution of + * this file, and for a DISCLAIMER OF ALL WARRANTIES. */ #include <stdio.h> #include "tkInt.h" -#include "tkPort.h" #include "tkCanvas.h" /* @@ -26,21 +25,21 @@ typedef enum { typedef struct LineItem { Tk_Item header; /* Generic stuff that's the same for all - * types. MUST BE FIRST IN STRUCTURE. */ + * types. MUST BE FIRST IN STRUCTURE. */ Tk_Outline outline; /* Outline structure */ - Tk_Canvas canvas; /* Canvas containing item. Needed for - * parsing arrow shapes. */ + Tk_Canvas canvas; /* Canvas containing item. Needed for parsing + * arrow shapes. */ int numPoints; /* Number of points in line (always >= 0). */ - double *coordPtr; /* Pointer to malloc-ed array containing - * x- and y-coords of all points in line. + double *coordPtr; /* Pointer to malloc-ed array containing x- + * and y-coords of all points in line. * X-coords are even-valued indices, y-coords * are corresponding odd-valued indices. If - * the line has arrowheads then the first - * and last points have been adjusted to refer - * to the necks of the arrowheads rather than - * their tips. The actual endpoints are - * stored in the *firstArrowPtr and - * *lastArrowPtr, if they exist. */ + * the line has arrowheads then the first and + * last points have been adjusted to refer to + * the necks of the arrowheads rather than + * their tips. The actual endpoints are stored + * in the *firstArrowPtr and *lastArrowPtr, if + * they exist. */ int capStyle; /* Cap style for line. */ int joinStyle; /* Join style for line. */ GC arrowGC; /* Graphics context for drawing arrowheads. */ @@ -53,13 +52,13 @@ typedef struct LineItem { * edge of shaft. */ double *firstArrowPtr; /* Points to array of PTS_IN_ARROW points * describing polygon for arrowhead at first - * point in line. First point of arrowhead - * is tip. Malloc'ed. NULL means no arrowhead - * at first point. */ + * point in line. First point of arrowhead is + * tip. Malloc'ed. NULL means no arrowhead at + * first point. */ double *lastArrowPtr; /* Points to polygon for arrowhead at last * point in line (PTS_IN_ARROW points, first - * of which is tip). Malloc'ed. NULL means - * no arrowhead at last point. */ + * of which is tip). Malloc'ed. NULL means no + * arrowhead at last point. */ Tk_SmoothMethod *smooth; /* Non-zero means draw line smoothed (i.e. * with Bezier splines). */ int splineSteps; /* Number of steps in each spline segment. */ @@ -72,65 +71,63 @@ typedef struct LineItem { #define PTS_IN_ARROW 6 /* - * Prototypes for procedures defined in this file: + * Prototypes for functions defined in this file: */ -static int ArrowheadPostscript _ANSI_ARGS_((Tcl_Interp *interp, +static int ArrowheadPostscript(Tcl_Interp *interp, Tk_Canvas canvas, LineItem *linePtr, - double *arrowPtr)); -static void ComputeLineBbox _ANSI_ARGS_((Tk_Canvas canvas, - LineItem *linePtr)); -static int ConfigureLine _ANSI_ARGS_((Tcl_Interp *interp, + double *arrowPtr); +static void ComputeLineBbox(Tk_Canvas canvas, LineItem *linePtr); +static int ConfigureLine(Tcl_Interp *interp, Tk_Canvas canvas, Tk_Item *itemPtr, int objc, - Tcl_Obj *CONST objv[], int flags)); -static int ConfigureArrows _ANSI_ARGS_((Tk_Canvas canvas, - LineItem *linePtr)); -static int CreateLine _ANSI_ARGS_((Tcl_Interp *interp, + Tcl_Obj *CONST objv[], int flags); +static int ConfigureArrows(Tk_Canvas canvas, LineItem *linePtr); +static int CreateLine(Tcl_Interp *interp, Tk_Canvas canvas, struct Tk_Item *itemPtr, - int objc, Tcl_Obj *CONST objv[])); -static void DeleteLine _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, Display *display)); -static void DisplayLine _ANSI_ARGS_((Tk_Canvas canvas, + int objc, Tcl_Obj *CONST objv[]); +static void DeleteLine(Tk_Canvas canvas, + Tk_Item *itemPtr, Display *display); +static void DisplayLine(Tk_Canvas canvas, Tk_Item *itemPtr, Display *display, Drawable dst, - int x, int y, int width, int height)); -static int GetLineIndex _ANSI_ARGS_((Tcl_Interp *interp, + int x, int y, int width, int height); +static int GetLineIndex(Tcl_Interp *interp, Tk_Canvas canvas, Tk_Item *itemPtr, - Tcl_Obj *obj, int *indexPtr)); -static int LineCoords _ANSI_ARGS_((Tcl_Interp *interp, + Tcl_Obj *obj, int *indexPtr); +static int LineCoords(Tcl_Interp *interp, Tk_Canvas canvas, Tk_Item *itemPtr, - int objc, Tcl_Obj *CONST objv[])); -static void LineDeleteCoords _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, int first, int last)); -static void LineInsert _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, int beforeThis, Tcl_Obj *obj)); -static int LineToArea _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, double *rectPtr)); -static double LineToPoint _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, double *coordPtr)); -static int LineToPostscript _ANSI_ARGS_((Tcl_Interp *interp, - Tk_Canvas canvas, Tk_Item *itemPtr, int prepass)); -static int ArrowParseProc _ANSI_ARGS_((ClientData clientData, + int objc, Tcl_Obj *CONST objv[]); +static void LineDeleteCoords(Tk_Canvas canvas, + Tk_Item *itemPtr, int first, int last); +static void LineInsert(Tk_Canvas canvas, + Tk_Item *itemPtr, int beforeThis, Tcl_Obj *obj); +static int LineToArea(Tk_Canvas canvas, + Tk_Item *itemPtr, double *rectPtr); +static double LineToPoint(Tk_Canvas canvas, + Tk_Item *itemPtr, double *coordPtr); +static int LineToPostscript(Tcl_Interp *interp, + Tk_Canvas canvas, Tk_Item *itemPtr, int prepass); +static int ArrowParseProc(ClientData clientData, Tcl_Interp *interp, Tk_Window tkwin, - CONST char *value, char *recordPtr, int offset)); -static char * ArrowPrintProc _ANSI_ARGS_((ClientData clientData, + CONST char *value, char *recordPtr, int offset); +static char * ArrowPrintProc(ClientData clientData, Tk_Window tkwin, char *recordPtr, int offset, - Tcl_FreeProc **freeProcPtr)); -static int ParseArrowShape _ANSI_ARGS_((ClientData clientData, + Tcl_FreeProc **freeProcPtr); +static int ParseArrowShape(ClientData clientData, Tcl_Interp *interp, Tk_Window tkwin, - CONST char *value, char *recordPtr, int offset)); -static char * PrintArrowShape _ANSI_ARGS_((ClientData clientData, + CONST char *value, char *recordPtr, int offset); +static char * PrintArrowShape(ClientData clientData, Tk_Window tkwin, char *recordPtr, int offset, - Tcl_FreeProc **freeProcPtr)); -static void ScaleLine _ANSI_ARGS_((Tk_Canvas canvas, + Tcl_FreeProc **freeProcPtr); +static void ScaleLine(Tk_Canvas canvas, Tk_Item *itemPtr, double originX, double originY, - double scaleX, double scaleY)); -static void TranslateLine _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, double deltaX, double deltaY)); + double scaleX, double scaleY); +static void TranslateLine(Tk_Canvas canvas, + Tk_Item *itemPtr, double deltaX, double deltaY); /* - * Information used for parsing configuration specs. If you change any - * of the default strings, be sure to change the corresponding default - * values in CreateLine. + * Information used for parsing configuration specs. If you change any of the + * default strings, be sure to change the corresponding default values in + * CreateLine. */ static Tk_CustomOption arrowShapeOption = { @@ -168,73 +165,65 @@ static Tk_CustomOption pixelOption = { }; static Tk_ConfigSpec configSpecs[] = { - {TK_CONFIG_CUSTOM, "-activedash", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(LineItem, outline.activeDash), + {TK_CONFIG_CUSTOM, "-activedash", NULL, NULL, + NULL, Tk_Offset(LineItem, outline.activeDash), TK_CONFIG_NULL_OK, &dashOption}, - {TK_CONFIG_COLOR, "-activefill", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(LineItem, outline.activeColor), - TK_CONFIG_NULL_OK}, - {TK_CONFIG_BITMAP, "-activestipple", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(LineItem, outline.activeStipple), - TK_CONFIG_NULL_OK}, - {TK_CONFIG_CUSTOM, "-activewidth", (char *) NULL, (char *) NULL, + {TK_CONFIG_COLOR, "-activefill", NULL, NULL, + NULL, Tk_Offset(LineItem, outline.activeColor), TK_CONFIG_NULL_OK}, + {TK_CONFIG_BITMAP, "-activestipple", NULL, NULL, + NULL, Tk_Offset(LineItem, outline.activeStipple), TK_CONFIG_NULL_OK}, + {TK_CONFIG_CUSTOM, "-activewidth", NULL, NULL, "0.0", Tk_Offset(LineItem, outline.activeWidth), TK_CONFIG_DONT_SET_DEFAULT, &pixelOption}, - {TK_CONFIG_CUSTOM, "-arrow", (char *) NULL, (char *) NULL, + {TK_CONFIG_CUSTOM, "-arrow", NULL, NULL, "none", Tk_Offset(LineItem, arrow), TK_CONFIG_DONT_SET_DEFAULT, &arrowOption}, - {TK_CONFIG_CUSTOM, "-arrowshape", (char *) NULL, (char *) NULL, + {TK_CONFIG_CUSTOM, "-arrowshape", NULL, NULL, "8 10 3", Tk_Offset(LineItem, arrowShapeA), TK_CONFIG_DONT_SET_DEFAULT, &arrowShapeOption}, - {TK_CONFIG_CAP_STYLE, "-capstyle", (char *) NULL, (char *) NULL, + {TK_CONFIG_CAP_STYLE, "-capstyle", NULL, NULL, "butt", Tk_Offset(LineItem, capStyle), TK_CONFIG_DONT_SET_DEFAULT}, - {TK_CONFIG_COLOR, "-fill", (char *) NULL, (char *) NULL, + {TK_CONFIG_COLOR, "-fill", NULL, NULL, "black", Tk_Offset(LineItem, outline.color), TK_CONFIG_NULL_OK}, - {TK_CONFIG_CUSTOM, "-dash", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(LineItem, outline.dash), + {TK_CONFIG_CUSTOM, "-dash", NULL, NULL, + NULL, Tk_Offset(LineItem, outline.dash), TK_CONFIG_NULL_OK, &dashOption}, - {TK_CONFIG_PIXELS, "-dashoffset", (char *) NULL, (char *) NULL, - "0", Tk_Offset(LineItem, outline.offset), - TK_CONFIG_DONT_SET_DEFAULT}, - {TK_CONFIG_CUSTOM, "-disableddash", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(LineItem, outline.disabledDash), + {TK_CONFIG_PIXELS, "-dashoffset", NULL, NULL, + "0", Tk_Offset(LineItem, outline.offset), TK_CONFIG_DONT_SET_DEFAULT}, + {TK_CONFIG_CUSTOM, "-disableddash", NULL, NULL, + NULL, Tk_Offset(LineItem, outline.disabledDash), TK_CONFIG_NULL_OK, &dashOption}, - {TK_CONFIG_COLOR, "-disabledfill", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(LineItem, outline.disabledColor), - TK_CONFIG_NULL_OK}, - {TK_CONFIG_BITMAP, "-disabledstipple", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(LineItem, outline.disabledStipple), - TK_CONFIG_NULL_OK}, - {TK_CONFIG_CUSTOM, "-disabledwidth", (char *) NULL, (char *) NULL, + {TK_CONFIG_COLOR, "-disabledfill", NULL, NULL, + NULL, Tk_Offset(LineItem, outline.disabledColor), TK_CONFIG_NULL_OK}, + {TK_CONFIG_BITMAP, "-disabledstipple", NULL, NULL, + NULL, Tk_Offset(LineItem, outline.disabledStipple), TK_CONFIG_NULL_OK}, + {TK_CONFIG_CUSTOM, "-disabledwidth", NULL, NULL, "0.0", Tk_Offset(LineItem, outline.disabledWidth), TK_CONFIG_DONT_SET_DEFAULT, &pixelOption}, - {TK_CONFIG_JOIN_STYLE, "-joinstyle", (char *) NULL, (char *) NULL, + {TK_CONFIG_JOIN_STYLE, "-joinstyle", NULL, NULL, "round", Tk_Offset(LineItem, joinStyle), TK_CONFIG_DONT_SET_DEFAULT}, - {TK_CONFIG_CUSTOM, "-offset", (char *) NULL, (char *) NULL, + {TK_CONFIG_CUSTOM, "-offset", NULL, NULL, "0,0", Tk_Offset(LineItem, outline.tsoffset), TK_CONFIG_DONT_SET_DEFAULT, &offsetOption}, - {TK_CONFIG_CUSTOM, "-smooth", (char *) NULL, (char *) NULL, + {TK_CONFIG_CUSTOM, "-smooth", NULL, NULL, "0", Tk_Offset(LineItem, smooth), TK_CONFIG_DONT_SET_DEFAULT, &smoothOption}, - {TK_CONFIG_INT, "-splinesteps", (char *) NULL, (char *) NULL, + {TK_CONFIG_INT, "-splinesteps", NULL, NULL, "12", Tk_Offset(LineItem, splineSteps), TK_CONFIG_DONT_SET_DEFAULT}, - {TK_CONFIG_CUSTOM, "-state", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, - &stateOption}, - {TK_CONFIG_BITMAP, "-stipple", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(LineItem, outline.stipple), - TK_CONFIG_NULL_OK}, - {TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL, - (char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, - {TK_CONFIG_CUSTOM, "-width", (char *) NULL, (char *) NULL, + {TK_CONFIG_CUSTOM, "-state", NULL, NULL, + NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, &stateOption}, + {TK_CONFIG_BITMAP, "-stipple", NULL, NULL, + NULL, Tk_Offset(LineItem, outline.stipple), TK_CONFIG_NULL_OK}, + {TK_CONFIG_CUSTOM, "-tags", NULL, NULL, + NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, + {TK_CONFIG_CUSTOM, "-width", NULL, NULL, "1.0", Tk_Offset(LineItem, outline.width), TK_CONFIG_DONT_SET_DEFAULT, &pixelOption}, - {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL, - (char *) NULL, 0, 0} + {TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0} }; /* - * The structures below defines the line item type by means - * of procedures that can be invoked by generic item code. + * The structures below defines the line item type by means of functions that + * can be invoked by generic item code. */ Tk_ItemType tkLineType = { @@ -253,17 +242,17 @@ Tk_ItemType tkLineType = { ScaleLine, /* scaleProc */ TranslateLine, /* translateProc */ (Tk_ItemIndexProc *) GetLineIndex, /* indexProc */ - (Tk_ItemCursorProc *) NULL, /* icursorProc */ - (Tk_ItemSelectionProc *) NULL, /* selectionProc */ + NULL, /* icursorProc */ + NULL, /* selectionProc */ (Tk_ItemInsertProc *) LineInsert, /* insertProc */ LineDeleteCoords, /* dTextProc */ - (Tk_ItemType *) NULL, /* nextPtr */ + NULL, /* nextPtr */ }; /* - * The definition below determines how large are static arrays - * used to hold spline points (splines larger than this have to - * have their arrays malloc-ed). + * The definition below determines how large are static arrays used to hold + * spline points (splines larger than this have to have their arrays + * malloc-ed). */ #define MAX_STATIC_POINTS 200 @@ -273,14 +262,13 @@ Tk_ItemType tkLineType = { * * CreateLine -- * - * This procedure is invoked to create a new line item in - * a canvas. + * This function is invoked to create a new line item in a canvas. * * Results: - * A standard Tcl return value. If an error occurred in - * creating the item, then an error message is left in - * the interp's result; in this case itemPtr is left uninitialized, - * so it can be safely freed by the caller. + * A standard Tcl return value. If an error occurred in creating the + * item, then an error message is left in the interp's result; in this + * case itemPtr is left uninitialized, so it can be safely freed by the + * caller. * * Side effects: * A new line item is created. @@ -289,25 +277,24 @@ Tk_ItemType tkLineType = { */ static int -CreateLine(interp, canvas, itemPtr, objc, objv) - Tcl_Interp *interp; /* Interpreter for error reporting. */ - Tk_Canvas canvas; /* Canvas to hold new item. */ - Tk_Item *itemPtr; /* Record to hold new item; header - * has been initialized by caller. */ - int objc; /* Number of arguments in objv. */ - Tcl_Obj *CONST objv[]; /* Arguments describing line. */ +CreateLine( + Tcl_Interp *interp, /* Interpreter for error reporting. */ + Tk_Canvas canvas, /* Canvas to hold new item. */ + Tk_Item *itemPtr, /* Record to hold new item; header has been + * initialized by caller. */ + int objc, /* Number of arguments in objv. */ + Tcl_Obj *CONST objv[]) /* Arguments describing line. */ { LineItem *linePtr = (LineItem *) itemPtr; int i; if (objc == 0) { - panic("canvas did not pass any coords\n"); + Tcl_Panic("canvas did not pass any coords\n"); } /* - * Carry out initialization that is needed to set defaults and to - * allow proper cleanup after errors during the the remainder of - * this procedure. + * Carry out initialization that is needed to set defaults and to allow + * proper cleanup after errors during the the remainder of this function. */ Tk_CreateOutline(&(linePtr->outline)); @@ -323,17 +310,18 @@ CreateLine(interp, canvas, itemPtr, objc, objv) linePtr->arrowShapeC = (float)3.0; linePtr->firstArrowPtr = NULL; linePtr->lastArrowPtr = NULL; - linePtr->smooth = (Tk_SmoothMethod *) NULL; + linePtr->smooth = NULL; linePtr->splineSteps = 12; /* - * Count the number of points and then parse them into a point - * array. Leading arguments are assumed to be points if they - * start with a digit or a minus sign followed by a digit. + * Count the number of points and then parse them into a point array. + * Leading arguments are assumed to be points if they start with a digit + * or a minus sign followed by a digit. */ for (i = 1; i < objc; i++) { char *arg = Tcl_GetString(objv[i]); + if ((arg[0] == '-') && (arg[1] >= 'a') && (arg[1] <= 'z')) { break; } @@ -345,7 +333,7 @@ CreateLine(interp, canvas, itemPtr, objc, objv) return TCL_OK; } - error: + error: DeleteLine(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas))); return TCL_ERROR; } @@ -355,9 +343,8 @@ CreateLine(interp, canvas, itemPtr, objc, objv) * * LineCoords -- * - * This procedure is invoked to process the "coords" widget - * command on lines. See the user documentation for details - * on what it does. + * This function is invoked to process the "coords" widget command on + * lines. See the user documentation for details on what it does. * * Results: * Returns TCL_OK or TCL_ERROR, and sets the interp's result. @@ -369,15 +356,13 @@ CreateLine(interp, canvas, itemPtr, objc, objv) */ static int -LineCoords(interp, canvas, itemPtr, objc, objv) - Tcl_Interp *interp; /* Used for error reporting. */ - Tk_Canvas canvas; /* Canvas containing item. */ - Tk_Item *itemPtr; /* Item whose coordinates are to be - * read or modified. */ - int objc; /* Number of coordinates supplied in - * objv. */ - Tcl_Obj *CONST objv[]; /* Array of coordinates: x1, y1, - * x2, y2, ... */ +LineCoords( + Tcl_Interp *interp, /* Used for error reporting. */ + Tk_Canvas canvas, /* Canvas containing item. */ + Tk_Item *itemPtr, /* Item whose coordinates are to be read or + * modified. */ + int objc, /* Number of coordinates supplied in objv. */ + Tcl_Obj *CONST objv[]) /* Array of coordinates: x1, y1, x2, y2, ... */ { LineItem *linePtr = (LineItem *) itemPtr; int i, numPoints; @@ -414,20 +399,22 @@ LineCoords(interp, canvas, itemPtr, objc, objv) } if (objc & 1) { char buf[64 + TCL_INTEGER_SPACE]; + sprintf(buf, "wrong # coordinates: expected an even number, got %d", objc); Tcl_SetResult(interp, buf, TCL_VOLATILE); return TCL_ERROR; } else if (objc < 4) { char buf[64 + TCL_INTEGER_SPACE]; + sprintf(buf, "wrong # coordinates: expected at least 4, got %d", objc); Tcl_SetResult(interp, buf, TCL_VOLATILE); return TCL_ERROR; } else { numPoints = objc/2; if (linePtr->numPoints != numPoints) { - coordPtr = (double *) ckalloc((unsigned) - (sizeof(double) * objc)); + coordPtr = (double *) + ckalloc((unsigned) (sizeof(double) * objc)); if (linePtr->coordPtr != NULL) { ckfree((char *) linePtr->coordPtr); } @@ -468,28 +455,28 @@ LineCoords(interp, canvas, itemPtr, objc, objv) * * ConfigureLine -- * - * This procedure is invoked to configure various aspects - * of a line item such as its background color. + * This function is invoked to configure various aspects of a line item + * such as its background color. * * Results: - * A standard Tcl result code. If an error occurs, then - * an error message is left in the interp's result. + * A standard Tcl result code. If an error occurs, then an error message + * is left in the interp's result. * * Side effects: - * Configuration information, such as colors and stipple - * patterns, may be set for itemPtr. + * Configuration information, such as colors and stipple patterns, may be + * set for itemPtr. * *-------------------------------------------------------------- */ static int -ConfigureLine(interp, canvas, itemPtr, objc, objv, flags) - Tcl_Interp *interp; /* Used for error reporting. */ - Tk_Canvas canvas; /* Canvas containing itemPtr. */ - Tk_Item *itemPtr; /* Line item to reconfigure. */ - int objc; /* Number of elements in objv. */ - Tcl_Obj *CONST objv[]; /* Arguments describing things to configure. */ - int flags; /* Flags to pass to Tk_ConfigureWidget. */ +ConfigureLine( + Tcl_Interp *interp, /* Used for error reporting. */ + Tk_Canvas canvas, /* Canvas containing itemPtr. */ + Tk_Item *itemPtr, /* Line item to reconfigure. */ + int objc, /* Number of elements in objv. */ + Tcl_Obj *CONST objv[], /* Arguments describing things to configure. */ + int flags) /* Flags to pass to Tk_ConfigureWidget. */ { LineItem *linePtr = (LineItem *) itemPtr; XGCValues gcValues; @@ -505,8 +492,8 @@ ConfigureLine(interp, canvas, itemPtr, objc, objv, flags) } /* - * A few of the options require additional processing, such as - * graphics contexts. + * A few of the options require additional processing, such as graphics + * contexts. */ state = itemPtr->state; @@ -571,9 +558,8 @@ ConfigureLine(interp, canvas, itemPtr, objc, objv, flags) } /* - * Setup arrowheads, if needed. If arrowheads are turned off, - * restore the line's endpoints (they were shortened when the - * arrowheads were added). + * Setup arrowheads, if needed. If arrowheads are turned off, restore the + * line's endpoints (they were shortened when the arrowheads were added). */ if ((linePtr->firstArrowPtr != NULL) && (linePtr->arrow != ARROWS_FIRST) @@ -611,8 +597,8 @@ ConfigureLine(interp, canvas, itemPtr, objc, objv, flags) * * DeleteLine -- * - * This procedure is called to clean up the data structure - * associated with a line item. + * This function is called to clean up the data structure associated with + * a line item. * * Results: * None. @@ -624,11 +610,10 @@ ConfigureLine(interp, canvas, itemPtr, objc, objv, flags) */ static void -DeleteLine(canvas, itemPtr, display) - Tk_Canvas canvas; /* Info about overall canvas widget. */ - Tk_Item *itemPtr; /* Item that is being deleted. */ - Display *display; /* Display containing window for - * canvas. */ +DeleteLine( + Tk_Canvas canvas, /* Info about overall canvas widget. */ + Tk_Item *itemPtr, /* Item that is being deleted. */ + Display *display) /* Display containing window for canvas. */ { LineItem *linePtr = (LineItem *) itemPtr; @@ -652,24 +637,22 @@ DeleteLine(canvas, itemPtr, display) * * ComputeLineBbox -- * - * This procedure is invoked to compute the bounding box of - * all the pixels that may be drawn as part of a line. + * This function is invoked to compute the bounding box of all the pixels + * that may be drawn as part of a line. * * Results: * None. * * Side effects: - * The fields x1, y1, x2, and y2 are updated in the header - * for itemPtr. + * The fields x1, y1, x2, and y2 are updated in the header for itemPtr. * *-------------------------------------------------------------- */ static void -ComputeLineBbox(canvas, linePtr) - Tk_Canvas canvas; /* Canvas that contains item. */ - LineItem *linePtr; /* Item whose bbos is to be - * recomputed. */ +ComputeLineBbox( + Tk_Canvas canvas, /* Canvas that contains item. */ + LineItem *linePtr) /* Item whose bbos is to be recomputed. */ { double *coordPtr; int i, intWidth; @@ -705,13 +688,12 @@ ComputeLineBbox(canvas, linePtr) linePtr->header.y1 = linePtr->header.y2 = (int) coordPtr[1]; /* - * Compute the bounding box of all the points in the line, - * then expand in all directions by the line's width to take - * care of butting or rounded corners and projecting or - * rounded caps. This expansion is an overestimate (worst-case - * is square root of two over two) but it's simple. Don't do - * anything special for curves. This causes an additional - * overestimate in the bounding box, but is faster. + * Compute the bounding box of all the points in the line, then expand in + * all directions by the line's width to take care of butting or rounded + * corners and projecting or rounded caps. This expansion is an + * overestimate (worst-case is square root of two over two) but it's + * simple. eDon't do anything special for curves. This causes an + * additional overestimate in the bounding box, but is faster. */ for (i = 1, coordPtr = linePtr->coordPtr+2; i < linePtr->numPoints; @@ -780,9 +762,9 @@ ComputeLineBbox(canvas, linePtr) } /* - * For mitered lines, make a second pass through all the points. - * Compute the locations of the two miter vertex points and add - * those into the bounding box. + * For mitered lines, make a second pass through all the points. Compute + * the locations of the two miter vertex points and add those into the + * bounding box. */ if (linePtr->joinStyle == JoinMiter) { @@ -790,7 +772,7 @@ ComputeLineBbox(canvas, linePtr) i--, coordPtr += 2) { double miter[4]; int j; - + if (TkGetMiterPoints(coordPtr, coordPtr+2, coordPtr+4, width, miter, miter+2)) { for (j = 0; j < 4; j += 2) { @@ -820,8 +802,8 @@ ComputeLineBbox(canvas, linePtr) } /* - * Add one more pixel of fudge factor just to be safe (e.g. - * X may round differently than we do). + * Add one more pixel of fudge factor just to be safe (e.g. X may round + * differently than we do). */ linePtr->header.x1 -= 1; @@ -835,28 +817,27 @@ ComputeLineBbox(canvas, linePtr) * * DisplayLine -- * - * This procedure is invoked to draw a line item in a given - * drawable. + * This function is invoked to draw a line item in a given drawable. * * Results: * None. * * Side effects: - * ItemPtr is drawn in drawable using the transformation - * information in canvas. + * ItemPtr is drawn in drawable using the transformation information in + * canvas. * *-------------------------------------------------------------- */ static void -DisplayLine(canvas, itemPtr, display, drawable, x, y, width, height) - Tk_Canvas canvas; /* Canvas that contains item. */ - Tk_Item *itemPtr; /* Item to be displayed. */ - Display *display; /* Display on which to draw item. */ - Drawable drawable; /* Pixmap or window in which to draw - * item. */ - int x, y, width, height; /* Describes region of canvas that - * must be redisplayed (not used). */ +DisplayLine( + Tk_Canvas canvas, /* Canvas that contains item. */ + Tk_Item *itemPtr, /* Item to be displayed. */ + Display *display, /* Display on which to draw item. */ + Drawable drawable, /* Pixmap or window in which to draw item. */ + int x, int y, int width, int height) + /* Describes region of canvas that must be + * redisplayed (not used). */ { LineItem *linePtr = (LineItem *) itemPtr; XPoint staticPoints[MAX_STATIC_POINTS*3]; @@ -883,16 +864,15 @@ DisplayLine(canvas, itemPtr, display, drawable, x, y, width, height) } } /* - * Build up an array of points in screen coordinates. Use a - * static array unless the line has an enormous number of points; - * in this case, dynamically allocate an array. For smoothed lines, - * generate the curve points on each redisplay. + * Build up an array of points in screen coordinates. Use a static array + * unless the line has an enormous number of points; in this case, + * dynamically allocate an array. For smoothed lines, generate the curve + * points on each redisplay. */ if ((linePtr->smooth) && (linePtr->numPoints > 2)) { - numPoints = linePtr->smooth->coordProc(canvas, (double *) NULL, - linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, - (double *) NULL); + numPoints = linePtr->smooth->coordProc(canvas, NULL, + linePtr->numPoints, linePtr->splineSteps, NULL, NULL); } else { numPoints = linePtr->numPoints; } @@ -905,18 +885,17 @@ DisplayLine(canvas, itemPtr, display, drawable, x, y, width, height) if ((linePtr->smooth) && (linePtr->numPoints > 2)) { numPoints = linePtr->smooth->coordProc(canvas, linePtr->coordPtr, - linePtr->numPoints, linePtr->splineSteps, pointPtr, - (double *) NULL); + linePtr->numPoints, linePtr->splineSteps, pointPtr, NULL); } else { numPoints = TkCanvTranslatePath((TkCanvas*)canvas, numPoints, linePtr->coordPtr, 0, pointPtr); } /* - * Display line, the free up line storage if it was dynamically - * allocated. If we're stippling, then modify the stipple offset - * in the GC. Be sure to reset the offset when done, since the - * GC is supposed to be read-only. + * Display line, the free up line storage if it was dynamically allocated. + * If we're stippling, then modify the stipple offset in the GC. Be sure + * to reset the offset when done, since the GC is supposed to be + * read-only. */ if (Tk_ChangeOutlineGC(canvas, itemPtr, &(linePtr->outline))) { @@ -972,24 +951,24 @@ DisplayLine(canvas, itemPtr, display, drawable, x, y, width, height) */ static void -LineInsert(canvas, itemPtr, beforeThis, obj) - Tk_Canvas canvas; /* Canvas containing text item. */ - Tk_Item *itemPtr; /* Line item to be modified. */ - int beforeThis; /* Index before which new coordinates - * are to be inserted. */ - Tcl_Obj *obj; /* New coordinates to be inserted. */ +LineInsert( + Tk_Canvas canvas, /* Canvas containing text item. */ + Tk_Item *itemPtr, /* Line item to be modified. */ + int beforeThis, /* Index before which new coordinates are to + * be inserted. */ + Tcl_Obj *obj) /* New coordinates to be inserted. */ { LineItem *linePtr = (LineItem *) itemPtr; int length, objc, i; - double *new, *coordPtr; + double *newCoordPtr, *coordPtr; Tk_State state = itemPtr->state; Tcl_Obj **objv; - if(state == TK_STATE_NULL) { + if (state == TK_STATE_NULL) { state = ((TkCanvas *)canvas)->canvas_state; } - if (!obj || (Tcl_ListObjGetElements((Tcl_Interp *) NULL, obj, &objc, &objv) != TCL_OK) + if (!obj || (Tcl_ListObjGetElements(NULL, obj, &objc, &objv) != TCL_OK) || !objc || objc&1) { return; } @@ -1008,38 +987,40 @@ LineInsert(canvas, itemPtr, beforeThis, obj) linePtr->coordPtr[length-2] = linePtr->lastArrowPtr[0]; linePtr->coordPtr[length-1] = linePtr->lastArrowPtr[1]; } - new = (double *) ckalloc((unsigned)(sizeof(double) * (length + objc))); - for(i=0; i<beforeThis; i++) { - new[i] = linePtr->coordPtr[i]; + newCoordPtr = (double *) + ckalloc(sizeof(double) * (unsigned)(length + objc)); + for (i=0; i<beforeThis; i++) { + newCoordPtr[i] = linePtr->coordPtr[i]; } - for(i=0; i<objc; i++) { - if (Tcl_GetDoubleFromObj((Tcl_Interp *) NULL,objv[i], - new+(i+beforeThis))!=TCL_OK) { + for (i=0; i<objc; i++) { + if (Tcl_GetDoubleFromObj(NULL, objv[i], + &newCoordPtr[i + beforeThis]) != TCL_OK) { Tcl_ResetResult(((TkCanvas *)canvas)->interp); - ckfree((char *) new); + ckfree((char *) newCoordPtr); return; } } - for(i=beforeThis; i<length; i++) { - new[i+objc] = linePtr->coordPtr[i]; + for (i=beforeThis; i<length; i++) { + newCoordPtr[i+objc] = linePtr->coordPtr[i]; } if (linePtr->coordPtr) { ckfree((char *) linePtr->coordPtr); } - linePtr->coordPtr = new; + linePtr->coordPtr = newCoordPtr; length += objc; linePtr->numPoints = length / 2; if ((length>3) && (state != TK_STATE_HIDDEN)) { /* - * This is some optimizing code that will result that only the part - * of the polygon that changed (and the objects that are overlapping - * with that part) need to be redrawn. A special flag is set that - * instructs the general canvas code not to redraw the whole - * object. If this flag is not set, the canvas will do the redrawing, - * otherwise I have to do it here. + * This is some optimizing code that will result that only the part of + * the polygon that changed (and the objects that are overlapping with + * that part) need to be redrawn. A special flag is set that instructs + * the general canvas code not to redraw the whole object. If this + * flag is not set, the canvas will do the redrawing, otherwise I have + * to do it here. */ + itemPtr->redraw_flags |= TK_ITEM_DONT_REDRAW; if (beforeThis>0) {beforeThis -= 2; objc+=2; } @@ -1055,23 +1036,29 @@ LineInsert(canvas, itemPtr, beforeThis, obj) itemPtr->x1 = itemPtr->x2 = (int) linePtr->coordPtr[beforeThis]; itemPtr->y1 = itemPtr->y2 = (int) linePtr->coordPtr[beforeThis+1]; if ((linePtr->firstArrowPtr != NULL) && (beforeThis<1)) { - /* include old first arrow */ + /* + * Include old first arrow. + */ + for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; i++, coordPtr += 2) { TkIncludePoint(itemPtr, coordPtr); } } if ((linePtr->lastArrowPtr != NULL) && ((beforeThis+objc)>=length)) { - /* include old last arrow */ + /* + * Include old last arrow. + */ + for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; i++, coordPtr += 2) { TkIncludePoint(itemPtr, coordPtr); } } coordPtr = linePtr->coordPtr+beforeThis+2; - for(i=2; i<objc; i+=2) { + for (i=2; i<objc; i+=2) { TkIncludePoint(itemPtr, coordPtr); - coordPtr+=2; + coordPtr+=2; } } if (linePtr->firstArrowPtr != NULL) { @@ -1083,21 +1070,28 @@ LineInsert(canvas, itemPtr, beforeThis, obj) linePtr->lastArrowPtr = NULL; } if (linePtr->arrow != ARROWS_NONE) { - ConfigureArrows(canvas, linePtr); + ConfigureArrows(canvas, linePtr); } - if(itemPtr->redraw_flags & TK_ITEM_DONT_REDRAW) { + if (itemPtr->redraw_flags & TK_ITEM_DONT_REDRAW) { double width; int intWidth; + if ((linePtr->firstArrowPtr != NULL) && (beforeThis>2)) { - /* include new first arrow */ + /* + * Include new first arrow. + */ + for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; i++, coordPtr += 2) { TkIncludePoint(itemPtr, coordPtr); } } - if ((linePtr->lastArrowPtr != NULL) && ((beforeThis+objc)<(length-2))) { - /* include new right arrow */ + if ((linePtr->lastArrowPtr != NULL) && (beforeThis+objc < length-2)) { + /* + * Include new right arrow. + */ + for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; i++, coordPtr += 2) { TkIncludePoint(itemPtr, coordPtr); @@ -1105,13 +1099,13 @@ LineInsert(canvas, itemPtr, beforeThis, obj) } width = linePtr->outline.width; if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { - if (linePtr->outline.activeWidth>width) { - width = linePtr->outline.activeWidth; - } + if (linePtr->outline.activeWidth>width) { + width = linePtr->outline.activeWidth; + } } else if (state==TK_STATE_DISABLED) { - if (linePtr->outline.disabledWidth>0) { - width = linePtr->outline.disabledWidth; - } + if (linePtr->outline.disabledWidth>0) { + width = linePtr->outline.disabledWidth; + } } intWidth = (int) (width + 0.5); if (intWidth < 1) { @@ -1137,18 +1131,18 @@ LineInsert(canvas, itemPtr, beforeThis, obj) * None. * * Side effects: - * Characters between "first" and "last", inclusive, get - * deleted from itemPtr. + * Characters between "first" and "last", inclusive, get deleted from + * itemPtr. * *-------------------------------------------------------------- */ static void -LineDeleteCoords(canvas, itemPtr, first, last) - Tk_Canvas canvas; /* Canvas containing itemPtr. */ - Tk_Item *itemPtr; /* Item in which to delete characters. */ - int first; /* Index of first character to delete. */ - int last; /* Index of last character to delete. */ +LineDeleteCoords( + Tk_Canvas canvas, /* Canvas containing itemPtr. */ + Tk_Item *itemPtr, /* Item in which to delete characters. */ + int first, /* Index of first character to delete. */ + int last) /* Index of last character to delete. */ { LineItem *linePtr = (LineItem *) itemPtr; int count, i, first1, last1; @@ -1156,7 +1150,7 @@ LineDeleteCoords(canvas, itemPtr, first, last) double *coordPtr; Tk_State state = itemPtr->state; - if(state == TK_STATE_NULL) { + if (state == TK_STATE_NULL) { state = ((TkCanvas *)canvas)->canvas_state; } @@ -1180,36 +1174,51 @@ LineDeleteCoords(canvas, itemPtr, first, last) linePtr->coordPtr[length-2] = linePtr->lastArrowPtr[0]; linePtr->coordPtr[length-1] = linePtr->lastArrowPtr[1]; } - first1 = first; last1 = last; - if(first1>0) first1 -= 2; - if(last1<length-2) last1 += 2; + first1 = first; + last1 = last; + if (first1 > 0) { + first1 -= 2; + } + if (last1 < length-2) { + last1 += 2; + } if (linePtr->smooth) { - if(first1>0) first1 -= 2; - if(last1<length-2) last1 += 2; + if (first1 > 0) { + first1 -= 2; + } + if (last1 < length-2) { + last1 += 2; + } } - if((first1<2) && (last1 >= length-2)) { + if (!(first1 < 2) && (last1 >= length-2)) { /* - * This is some optimizing code that will result that only the part - * of the line that changed (and the objects that are overlapping - * with that part) need to be redrawn. A special flag is set that - * instructs the general canvas code not to redraw the whole - * object. If this flag is set, the redrawing has to be done here, - * otherwise the general Canvas code will take care of it. + * This is some optimizing code that will result that only the part of + * the line that changed (and the objects that are overlapping with + * that part) need to be redrawn. A special flag is set that instructs + * the general canvas code not to redraw the whole object. If this + * flag is set, the redrawing has to be done here, otherwise the + * general Canvas code will take care of it. */ itemPtr->redraw_flags |= TK_ITEM_DONT_REDRAW; itemPtr->x1 = itemPtr->x2 = (int) linePtr->coordPtr[first1]; itemPtr->y1 = itemPtr->y2 = (int) linePtr->coordPtr[first1+1]; - if ((linePtr->firstArrowPtr != NULL) && (first1<2)) { - /* include old first arrow */ + if ((linePtr->firstArrowPtr != NULL) && (first1 < 2)) { + /* + * Include old first arrow. + */ + for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; i++, coordPtr += 2) { TkIncludePoint(itemPtr, coordPtr); } } - if ((linePtr->lastArrowPtr != NULL) && (last1>=length-2)) { - /* include old last arrow */ + if ((linePtr->lastArrowPtr != NULL) && (last1 >= length-2)) { + /* + * Include old last arrow. + */ + for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; i++, coordPtr += 2) { TkIncludePoint(itemPtr, coordPtr); @@ -1218,7 +1227,7 @@ LineDeleteCoords(canvas, itemPtr, first, last) coordPtr = linePtr->coordPtr+first1+2; for (i=first1+2; i<=last1; i+=2) { TkIncludePoint(itemPtr, coordPtr); - coordPtr+=2; + coordPtr += 2; } } @@ -1236,20 +1245,27 @@ LineDeleteCoords(canvas, itemPtr, first, last) linePtr->lastArrowPtr = NULL; } if (linePtr->arrow != ARROWS_NONE) { - ConfigureArrows(canvas, linePtr); + ConfigureArrows(canvas, linePtr); } - if(itemPtr->redraw_flags & TK_ITEM_DONT_REDRAW) { + if (itemPtr->redraw_flags & TK_ITEM_DONT_REDRAW) { double width; int intWidth; - if ((linePtr->firstArrowPtr != NULL) && (first1<4)) { - /* include new first arrow */ + + if ((linePtr->firstArrowPtr != NULL) && (first1 < 4)) { + /* + * Include new first arrow. + */ + for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; i++, coordPtr += 2) { TkIncludePoint(itemPtr, coordPtr); } } - if ((linePtr->lastArrowPtr != NULL) && (last1>(length-4))) { - /* include new right arrow */ + if ((linePtr->lastArrowPtr != NULL) && (last1 > length-4)) { + /* + * Include new right arrow. + */ + for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; i++, coordPtr += 2) { TkIncludePoint(itemPtr, coordPtr); @@ -1257,20 +1273,22 @@ LineDeleteCoords(canvas, itemPtr, first, last) } width = linePtr->outline.width; if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { - if (linePtr->outline.activeWidth>width) { - width = linePtr->outline.activeWidth; - } + if (linePtr->outline.activeWidth > width) { + width = linePtr->outline.activeWidth; + } } else if (state==TK_STATE_DISABLED) { - if (linePtr->outline.disabledWidth>0) { - width = linePtr->outline.disabledWidth; - } + if (linePtr->outline.disabledWidth > 0) { + width = linePtr->outline.disabledWidth; + } } intWidth = (int) (width + 0.5); if (intWidth < 1) { intWidth = 1; } - itemPtr->x1 -= intWidth; itemPtr->y1 -= intWidth; - itemPtr->x2 += intWidth; itemPtr->y2 += intWidth; + itemPtr->x1 -= intWidth; + itemPtr->y1 -= intWidth; + itemPtr->x2 += intWidth; + itemPtr->y2 += intWidth; Tk_CanvasEventuallyRedraw(canvas, itemPtr->x1, itemPtr->y1, itemPtr->x2, itemPtr->y2); } @@ -1282,14 +1300,14 @@ LineDeleteCoords(canvas, itemPtr, first, last) * * LineToPoint -- * - * Computes the distance from a given point to a given - * line, in canvas units. + * Computes the distance from a given point to a given line, in canvas + * units. * * Results: - * The return value is 0 if the point whose x and y coordinates - * are pointPtr[0] and pointPtr[1] is inside the line. If the - * point isn't inside the line then the return value is the - * distance from the point to the line. + * The return value is 0 if the point whose x and y coordinates are + * pointPtr[0] and pointPtr[1] is inside the line. If the point isn't + * inside the line then the return value is the distance from the point + * to the line. * * Side effects: * None. @@ -1299,10 +1317,10 @@ LineDeleteCoords(canvas, itemPtr, first, last) /* ARGSUSED */ static double -LineToPoint(canvas, itemPtr, pointPtr) - Tk_Canvas canvas; /* Canvas containing item. */ - Tk_Item *itemPtr; /* Item to check against point. */ - double *pointPtr; /* Pointer to x and y coordinates. */ +LineToPoint( + Tk_Canvas canvas, /* Canvas containing item. */ + Tk_Item *itemPtr, /* Item to check against point. */ + double *pointPtr) /* Pointer to x and y coordinates. */ { Tk_State state = itemPtr->state; LineItem *linePtr = (LineItem *) itemPtr; @@ -1311,15 +1329,15 @@ LineToPoint(canvas, itemPtr, pointPtr) double poly[10]; double bestDist, dist, width; int numPoints, count; - int changedMiterToBevel; /* Non-zero means that a mitered corner - * had to be treated as beveled after all - * because the angle was < 11 degrees. */ + int changedMiterToBevel; /* Non-zero means that a mitered corner had to + * be treated as beveled after all because the + * angle was < 11 degrees. */ bestDist = 1.0e36; /* - * Handle smoothed lines by generating an expanded set of points - * against which to do the check. + * Handle smoothed lines by generating an expanded set of points against + * which to do the check. */ if(state == TK_STATE_NULL) { @@ -1338,9 +1356,8 @@ LineToPoint(canvas, itemPtr, pointPtr) } if ((linePtr->smooth) && (linePtr->numPoints > 2)) { - numPoints = linePtr->smooth->coordProc(canvas, (double *) NULL, - linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, - (double *) NULL); + numPoints = linePtr->smooth->coordProc(canvas, NULL, + linePtr->numPoints, linePtr->splineSteps, NULL, NULL); if (numPoints <= MAX_STATIC_POINTS) { linePoints = staticSpace; } else { @@ -1348,8 +1365,7 @@ LineToPoint(canvas, itemPtr, pointPtr) (2*numPoints*sizeof(double))); } numPoints = linePtr->smooth->coordProc(canvas, linePtr->coordPtr, - linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, - linePoints); + linePtr->numPoints, linePtr->splineSteps, NULL, linePoints); } else { numPoints = linePtr->numPoints; linePoints = linePtr->coordPtr; @@ -1362,26 +1378,25 @@ LineToPoint(canvas, itemPtr, pointPtr) if (!numPoints || itemPtr->state==TK_STATE_HIDDEN) { return bestDist; } else if (numPoints == 1) { - bestDist = hypot(linePoints[0] - pointPtr[0], linePoints[1] - pointPtr[1]) - - width/2.0; + bestDist = hypot(linePoints[0]-pointPtr[0], linePoints[1]-pointPtr[1]) + - width/2.0; if (bestDist < 0) bestDist = 0; return bestDist; } /* - * The overall idea is to iterate through all of the edges of - * the line, computing a polygon for each edge and testing the - * point against that polygon. In addition, there are additional - * tests to deal with rounded joints and caps. + * The overall idea is to iterate through all of the edges of the line, + * computing a polygon for each edge and testing the point against that + * polygon. In addition, there are additional tests to deal with rounded + * joints and caps. */ changedMiterToBevel = 0; for (count = numPoints, coordPtr = linePoints; count >= 2; count--, coordPtr += 2) { - /* - * If rounding is done around the first point then compute - * the distance between the point and the point. + * If rounding is done around the first point then compute the + * distance between the point and the point. */ if (((linePtr->capStyle == CapRound) && (count == numPoints)) @@ -1398,9 +1413,9 @@ LineToPoint(canvas, itemPtr, pointPtr) } /* - * Compute the polygonal shape corresponding to this edge, - * consisting of two points for the first point of the edge - * and two points for the last point of the edge. + * Compute the polygonal shape corresponding to this edge, consisting + * of two points for the first point of the edge and two points for + * the last point of the edge. */ if (count == numPoints) { @@ -1412,14 +1427,13 @@ LineToPoint(canvas, itemPtr, pointPtr) poly[2] = poly[4]; poly[3] = poly[5]; } else { - TkGetButtPoints(coordPtr+2, coordPtr, width, 0, - poly, poly+2); + TkGetButtPoints(coordPtr+2, coordPtr, width, 0, poly, poly+2); /* - * If this line uses beveled joints, then check the distance - * to a polygon comprising the last two points of the previous - * polygon and the first two from this polygon; this checks - * the wedges that fill the mitered joint. + * If this line uses beveled joints, then check the distance to a + * polygon comprising the last two points of the previous polygon + * and the first two from this polygon; this checks the wedges + * that fill the mitered joint. */ if ((linePtr->joinStyle == JoinBevel) || changedMiterToBevel) { @@ -1442,8 +1456,8 @@ LineToPoint(canvas, itemPtr, pointPtr) if (TkGetMiterPoints(coordPtr, coordPtr+2, coordPtr+4, width, poly+4, poly+6) == 0) { changedMiterToBevel = 1; - TkGetButtPoints(coordPtr, coordPtr+2, width, - 0, poly+4, poly+6); + TkGetButtPoints(coordPtr, coordPtr+2, width, 0, + poly+4, poly+6); } } else { TkGetButtPoints(coordPtr, coordPtr+2, width, 0, @@ -1461,8 +1475,8 @@ LineToPoint(canvas, itemPtr, pointPtr) } /* - * If caps are rounded, check the distance to the cap around the - * final end point of the line. + * If caps are rounded, check the distance to the cap around the final end + * point of the line. */ if (linePtr->capStyle == CapRound) { @@ -1503,7 +1517,7 @@ LineToPoint(canvas, itemPtr, pointPtr) } } - done: + done: if ((linePoints != staticSpace) && (linePoints != linePtr->coordPtr)) { ckfree((char *) linePoints); } @@ -1515,14 +1529,12 @@ LineToPoint(canvas, itemPtr, pointPtr) * * LineToArea -- * - * This procedure is called to determine whether an item - * lies entirely inside, entirely outside, or overlapping - * a given rectangular area. + * This function is called to determine whether an item lies entirely + * inside, entirely outside, or overlapping a given rectangular area. * * Results: - * -1 is returned if the item is entirely outside the - * area, 0 if it overlaps, and 1 if it is entirely - * inside the given area. + * -1 is returned if the item is entirely outside the area, 0 if it + * overlaps, and 1 if it is entirely inside the given area. * * Side effects: * None. @@ -1532,10 +1544,10 @@ LineToPoint(canvas, itemPtr, pointPtr) /* ARGSUSED */ static int -LineToArea(canvas, itemPtr, rectPtr) - Tk_Canvas canvas; /* Canvas containing item. */ - Tk_Item *itemPtr; /* Item to check against line. */ - double *rectPtr; +LineToArea( + Tk_Canvas canvas, /* Canvas containing item. */ + Tk_Item *itemPtr, /* Item to check against line. */ + double *rectPtr) { LineItem *linePtr = (LineItem *) itemPtr; double staticSpace[2*MAX_STATIC_POINTS]; @@ -1564,6 +1576,7 @@ LineToArea(canvas, itemPtr, rectPtr) return -1; } else if (linePtr->numPoints == 1) { double oval[4]; + oval[0] = linePtr->coordPtr[0]-radius; oval[1] = linePtr->coordPtr[1]-radius; oval[2] = linePtr->coordPtr[0]+radius; @@ -1572,14 +1585,13 @@ LineToArea(canvas, itemPtr, rectPtr) } /* - * Handle smoothed lines by generating an expanded set of points - * against which to do the check. + * Handle smoothed lines by generating an expanded set of points against + * which to do the check. */ if ((linePtr->smooth) && (linePtr->numPoints > 2)) { - numPoints = linePtr->smooth->coordProc(canvas, (double *) NULL, - linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, - (double *) NULL); + numPoints = linePtr->smooth->coordProc(canvas, NULL, + linePtr->numPoints, linePtr->splineSteps, NULL, NULL); if (numPoints <= MAX_STATIC_POINTS) { linePoints = staticSpace; } else { @@ -1587,8 +1599,7 @@ LineToArea(canvas, itemPtr, rectPtr) (2*numPoints*sizeof(double))); } numPoints = linePtr->smooth->coordProc(canvas, linePtr->coordPtr, - linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, - linePoints); + linePtr->numPoints, linePtr->splineSteps, NULL, linePoints); } else { numPoints = linePtr->numPoints; linePoints = linePtr->coordPtr; @@ -1602,7 +1613,7 @@ LineToArea(canvas, itemPtr, rectPtr) width = 1.0; } - result = TkThickPolyLineToArea(linePoints, numPoints, + result = TkThickPolyLineToArea(linePoints, numPoints, width, linePtr->capStyle, linePtr->joinStyle, rectPtr); if (result == 0) { @@ -1630,7 +1641,7 @@ LineToArea(canvas, itemPtr, rectPtr) } } - done: + done: if ((linePoints != staticSpace) && (linePoints != linePtr->coordPtr)) { ckfree((char *) linePoints); } @@ -1642,15 +1653,14 @@ LineToArea(canvas, itemPtr, rectPtr) * * ScaleLine -- * - * This procedure is invoked to rescale a line item. + * This function is invoked to rescale a line item. * * Results: * None. * * Side effects: - * The line referred to by itemPtr is rescaled so that the - * following transformation is applied to all point - * coordinates: + * The line referred to by itemPtr is rescaled so that the following + * transformation is applied to all point coordinates: * x' = originX + scaleX*(x-originX) * y' = originY + scaleY*(y-originY) * @@ -1658,20 +1668,21 @@ LineToArea(canvas, itemPtr, rectPtr) */ static void -ScaleLine(canvas, itemPtr, originX, originY, scaleX, scaleY) - Tk_Canvas canvas; /* Canvas containing line. */ - Tk_Item *itemPtr; /* Line to be scaled. */ - double originX, originY; /* Origin about which to scale rect. */ - double scaleX; /* Amount to scale in X direction. */ - double scaleY; /* Amount to scale in Y direction. */ +ScaleLine( + Tk_Canvas canvas, /* Canvas containing line. */ + Tk_Item *itemPtr, /* Line to be scaled. */ + double originX, double originY, + /* Origin about which to scale rect. */ + double scaleX, /* Amount to scale in X direction. */ + double scaleY) /* Amount to scale in Y direction. */ { LineItem *linePtr = (LineItem *) itemPtr; double *coordPtr; int i; /* - * Delete any arrowheads before scaling all the points (so that - * the end-points of the line get restored). + * Delete any arrowheads before scaling all the points (so that the + * end-points of the line get restored). */ if (linePtr->firstArrowPtr != NULL) { @@ -1705,14 +1716,13 @@ ScaleLine(canvas, itemPtr, originX, originY, scaleX, scaleY) * * GetLineIndex -- * - * Parse an index into a line item and return either its value - * or an error. + * Parse an index into a line item and return either its value or an + * error. * * Results: - * A standard Tcl result. If all went well, then *indexPtr is - * filled in with the index (into itemPtr) corresponding to - * string. Otherwise an error message is left in - * interp->result. + * A standard Tcl result. If all went well, then *indexPtr is filled in + * with the index (into itemPtr) corresponding to string. Otherwise an + * error message is left in interp->result. * * Side effects: * None. @@ -1721,14 +1731,14 @@ ScaleLine(canvas, itemPtr, originX, originY, scaleX, scaleY) */ static int -GetLineIndex(interp, canvas, itemPtr, obj, indexPtr) - Tcl_Interp *interp; /* Used for error reporting. */ - Tk_Canvas canvas; /* Canvas containing item. */ - Tk_Item *itemPtr; /* Item for which the index is being +GetLineIndex( + Tcl_Interp *interp, /* Used for error reporting. */ + Tk_Canvas canvas, /* Canvas containing item. */ + Tk_Item *itemPtr, /* Item for which the index is being * specified. */ - Tcl_Obj *obj; /* Specification of a particular coord - * in itemPtr's line. */ - int *indexPtr; /* Where to store converted index. */ + Tcl_Obj *obj, /* Specification of a particular coord in + * itemPtr's line. */ + int *indexPtr) /* Where to store converted index. */ { LineItem *linePtr = (LineItem *) itemPtr; int length; @@ -1738,16 +1748,14 @@ GetLineIndex(interp, canvas, itemPtr, obj, indexPtr) if (strncmp(string, "end", (unsigned) length) == 0) { *indexPtr = 2*linePtr->numPoints; } else { - badIndex: - /* - * Some of the paths here leave messages in interp->result, - * so we have to clear it out before storing our own message. + * Some of the paths here leave messages in interp->result, so we + * have to clear it out before storing our own message. */ - Tcl_SetResult(interp, (char *) NULL, TCL_STATIC); - Tcl_AppendResult(interp, "bad index \"", string, "\"", - (char *) NULL); + badIndex: + Tcl_SetResult(interp, NULL, TCL_STATIC); + Tcl_AppendResult(interp, "bad index \"", string, "\"", NULL); return TCL_ERROR; } } else if (string[0] == '@') { @@ -1780,7 +1788,7 @@ GetLineIndex(interp, canvas, itemPtr, obj, indexPtr) if (Tcl_GetIntFromObj(interp, obj, indexPtr) != TCL_OK) { goto badIndex; } - *indexPtr &= -2; /* if index is odd, make it even */ + *indexPtr &= -2; /* if index is odd, make it even */ if (*indexPtr < 0){ *indexPtr = 0; } else if (*indexPtr > (2*linePtr->numPoints)) { @@ -1795,25 +1803,24 @@ GetLineIndex(interp, canvas, itemPtr, obj, indexPtr) * * TranslateLine -- * - * This procedure is called to move a line by a given amount. + * This function is called to move a line by a given amount. * * Results: * None. * * Side effects: - * The position of the line is offset by (xDelta, yDelta), and - * the bounding box is updated in the generic part of the item - * structure. + * The position of the line is offset by (xDelta, yDelta), and the + * bounding box is updated in the generic part of the item structure. * *-------------------------------------------------------------- */ static void -TranslateLine(canvas, itemPtr, deltaX, deltaY) - Tk_Canvas canvas; /* Canvas containing item. */ - Tk_Item *itemPtr; /* Item that is being moved. */ - double deltaX, deltaY; /* Amount by which item is to be - * moved. */ +TranslateLine( + Tk_Canvas canvas, /* Canvas containing item. */ + Tk_Item *itemPtr, /* Item that is being moved. */ + double deltaX, double deltaY) + /* Amount by which item is to be moved. */ { LineItem *linePtr = (LineItem *) itemPtr; double *coordPtr; @@ -1846,13 +1853,13 @@ TranslateLine(canvas, itemPtr, deltaX, deltaY) * * ParseArrowShape -- * - * This procedure is called back during option parsing to - * parse arrow shape information. + * This function is called back during option parsing to parse arrow + * shape information. * * Results: - * The return value is a standard Tcl result: TCL_OK means - * that the arrow shape information was parsed ok, and - * TCL_ERROR means it couldn't be parsed. + * The return value is a standard Tcl result: TCL_OK means that the arrow + * shape information was parsed ok, and TCL_ERROR means it couldn't be + * parsed. * * Side effects: * Arrow information in recordPtr is updated. @@ -1862,14 +1869,14 @@ TranslateLine(canvas, itemPtr, deltaX, deltaY) /* ARGSUSED */ static int -ParseArrowShape(clientData, interp, tkwin, value, recordPtr, offset) - ClientData clientData; /* Not used. */ - Tcl_Interp *interp; /* Used for error reporting. */ - Tk_Window tkwin; /* Not used. */ - CONST char *value; /* Textual specification of arrow shape. */ - char *recordPtr; /* Pointer to item record in which to - * store arrow information. */ - int offset; /* Offset of shape information in widget +ParseArrowShape( + ClientData clientData, /* Not used. */ + Tcl_Interp *interp, /* Used for error reporting. */ + Tk_Window tkwin, /* Not used. */ + CONST char *value, /* Textual specification of arrow shape. */ + char *recordPtr, /* Pointer to item record in which to store + * arrow information. */ + int offset) /* Offset of shape information in widget * record. */ { LineItem *linePtr = (LineItem *) recordPtr; @@ -1878,14 +1885,14 @@ ParseArrowShape(clientData, interp, tkwin, value, recordPtr, offset) CONST char **argv = NULL; if (offset != Tk_Offset(LineItem, arrowShapeA)) { - panic("ParseArrowShape received bogus offset"); + Tcl_Panic("ParseArrowShape received bogus offset"); } if (Tcl_SplitList(interp, (char *) value, &argc, &argv) != TCL_OK) { syntaxError: Tcl_ResetResult(interp); Tcl_AppendResult(interp, "bad arrow shape \"", value, - "\": must be list with three numbers", (char *) NULL); + "\": must be list with three numbers", NULL); if (argv != NULL) { ckfree((char *) argv); } @@ -1913,8 +1920,8 @@ ParseArrowShape(clientData, interp, tkwin, value, recordPtr, offset) * * PrintArrowShape -- * - * This procedure is a callback invoked by the configuration - * code to return a printable value describing an arrow shape. + * This function is a callback invoked by the configuration code to + * return a printable value describing an arrow shape. * * Results: * None. @@ -1927,14 +1934,14 @@ ParseArrowShape(clientData, interp, tkwin, value, recordPtr, offset) /* ARGSUSED */ static char * -PrintArrowShape(clientData, tkwin, recordPtr, offset, freeProcPtr) - ClientData clientData; /* Not used. */ - Tk_Window tkwin; /* Window associated with linePtr's widget. */ - char *recordPtr; /* Pointer to item record containing current +PrintArrowShape( + ClientData clientData, /* Not used. */ + Tk_Window tkwin, /* Window associated with linePtr's widget. */ + char *recordPtr, /* Pointer to item record containing current * shape information. */ - int offset; /* Offset of arrow information in record. */ - Tcl_FreeProc **freeProcPtr; /* Store address of procedure to call to - * free string here. */ + int offset, /* Offset of arrow information in record. */ + Tcl_FreeProc **freeProcPtr) /* Store address of function to call to free + * string here. */ { LineItem *linePtr = (LineItem *) recordPtr; char *buffer; @@ -1952,27 +1959,27 @@ PrintArrowShape(clientData, tkwin, recordPtr, offset, freeProcPtr) * * ArrowParseProc -- * - * This procedure is invoked during option processing to handle - * the "-arrow" option. + * This function is invoked during option processing to handle the + * "-arrow" option. * * Results: * A standard Tcl return value. * * Side effects: - * The arrow for a given item gets replaced by the arrow - * indicated in the value argument. + * The arrow for a given item gets replaced by the arrow indicated in the + * value argument. * *-------------------------------------------------------------- */ static int -ArrowParseProc(clientData, interp, tkwin, value, widgRec, offset) - ClientData clientData; /* some flags.*/ - Tcl_Interp *interp; /* Used for reporting errors. */ - Tk_Window tkwin; /* Window containing canvas widget. */ - CONST char *value; /* Value of option. */ - char *widgRec; /* Pointer to record for item. */ - int offset; /* Offset into item. */ +ArrowParseProc( + ClientData clientData, /* some flags.*/ + Tcl_Interp *interp, /* Used for reporting errors. */ + Tk_Window tkwin, /* Window containing canvas widget. */ + CONST char *value, /* Value of option. */ + char *widgRec, /* Pointer to record for item. */ + int offset) /* Offset into item. */ { int c; size_t length; @@ -2004,9 +2011,8 @@ ArrowParseProc(clientData, interp, tkwin, value, widgRec, offset) return TCL_OK; } - Tcl_AppendResult(interp, "bad arrow spec \"", value, - "\": must be none, first, last, or both", - (char *) NULL); + Tcl_AppendResult(interp, "bad arrow spec \"", value, + "\": must be none, first, last, or both", NULL); *arrowPtr = ARROWS_NONE; return TCL_ERROR; } @@ -2016,16 +2022,15 @@ ArrowParseProc(clientData, interp, tkwin, value, widgRec, offset) * * ArrowPrintProc -- * - * This procedure is invoked by the Tk configuration code - * to produce a printable string for the "-arrow" - * configuration option. + * This function is invoked by the Tk configuration code to produce a + * printable string for the "-arrow" configuration option. * * Results: - * The return value is a string describing the arrows for - * the item referred to by "widgRec". In addition, *freeProcPtr - * is filled in with the address of a procedure to call to free - * the result string when it's no longer needed (or NULL to - * indicate that the string doesn't need to be freed). + * The return value is a string describing the arrows for the item + * referred to by "widgRec". In addition, *freeProcPtr is filled in with + * the address of a function to call to free the result string when it's + * no longer needed (or NULL to indicate that the string doesn't need to + * be freed). * * Side effects: * None. @@ -2034,25 +2039,25 @@ ArrowParseProc(clientData, interp, tkwin, value, widgRec, offset) */ static char * -ArrowPrintProc(clientData, tkwin, widgRec, offset, freeProcPtr) - ClientData clientData; /* Ignored. */ - Tk_Window tkwin; /* Window containing canvas widget. */ - char *widgRec; /* Pointer to record for item. */ - int offset; /* Offset into item. */ - Tcl_FreeProc **freeProcPtr; /* Pointer to variable to fill in with - * information about how to reclaim - * storage for return string. */ +ArrowPrintProc( + ClientData clientData, /* Ignored. */ + Tk_Window tkwin, /* Window containing canvas widget. */ + char *widgRec, /* Pointer to record for item. */ + int offset, /* Offset into item. */ + Tcl_FreeProc **freeProcPtr) /* Pointer to variable to fill in with + * information about how to reclaim storage + * for return string. */ { register Arrows *arrowPtr = (Arrows *) (widgRec + offset); switch (*arrowPtr) { - case ARROWS_FIRST: + case ARROWS_FIRST: return "first"; - case ARROWS_LAST: + case ARROWS_LAST: return "last"; - case ARROWS_BOTH: + case ARROWS_BOTH: return "both"; - default: + default: return "none"; } } @@ -2062,40 +2067,38 @@ ArrowPrintProc(clientData, tkwin, widgRec, offset, freeProcPtr) * * ConfigureArrows -- * - * If arrowheads have been requested for a line, this - * procedure makes arrangements for the arrowheads. + * If arrowheads have been requested for a line, this function makes + * arrangements for the arrowheads. * * Results: * Always returns TCL_OK. * * Side effects: - * Information in linePtr is set up for one or two arrowheads. - * the firstArrowPtr and lastArrowPtr polygons are allocated - * and initialized, if need be, and the end points of the line - * are adjusted so that a thick line doesn't stick out past - * the arrowheads. + * Information in linePtr is set up for one or two arrowheads. The + * firstArrowPtr and lastArrowPtr polygons are allocated and initialized, + * if need be, and the end points of the line are adjusted so that a + * thick line doesn't stick out past the arrowheads. * *-------------------------------------------------------------- */ /* ARGSUSED */ static int -ConfigureArrows(canvas, linePtr) - Tk_Canvas canvas; /* Canvas in which arrows will be - * displayed (interp and tkwin - * fields are needed). */ - LineItem *linePtr; /* Item to configure for arrows. */ +ConfigureArrows( + Tk_Canvas canvas, /* Canvas in which arrows will be displayed + * (interp and tkwin fields are needed). */ + LineItem *linePtr) /* Item to configure for arrows. */ { double *poly, *coordPtr; double dx, dy, length, sinTheta, cosTheta, temp; - double fracHeight; /* Line width as fraction of - * arrowhead width. */ - double backup; /* Distance to backup end points - * so the line ends in the middle - * of the arrowhead. */ - double vertX, vertY; /* Position of arrowhead vertex. */ - double shapeA, shapeB, shapeC; /* Adjusted coordinates (see - * explanation below). */ + double fracHeight; /* Line width as fraction of arrowhead + * width. */ + double backup; /* Distance to backup end points so the line + * ends in the middle of the arrowhead. */ + double vertX, vertY; /* Position of arrowhead vertex. */ + double shapeA, shapeB, shapeC; + /* Adjusted coordinates (see explanation + * below). */ double width; Tk_State state = linePtr->header.state; @@ -2119,10 +2122,10 @@ ConfigureArrows(canvas, linePtr) } /* - * The code below makes a tiny increase in the shape parameters - * for the line. This is a bit of a hack, but it seems to result - * in displays that more closely approximate the specified parameters. - * Without the adjustment, the arrows come out smaller than expected. + * The code below makes a tiny increase in the shape parameters for the + * line. This is a bit of a hack, but it seems to result in displays that + * more closely approximate the specified parameters. Without the + * adjustment, the arrows come out smaller than expected. */ shapeA = linePtr->arrowShapeA + 0.001; @@ -2130,9 +2133,9 @@ ConfigureArrows(canvas, linePtr) shapeC = linePtr->arrowShapeC + width/2.0 + 0.001; /* - * If there's an arrowhead on the first point of the line, compute - * its polygon and adjust the first point of the line so that the - * line doesn't stick out past the leading edge of the arrowhead. + * If there's an arrowhead on the first point of the line, compute its + * polygon and adjust the first point of the line so that the line doesn't + * stick out past the leading edge of the arrowhead. */ fracHeight = (width/2.0)/shapeC; @@ -2169,9 +2172,8 @@ ConfigureArrows(canvas, linePtr) poly[7] = poly[9]*fracHeight + vertY*(1.0-fracHeight); /* - * Polygon done. Now move the first point towards the second so - * that the corners at the end of the line are inside the - * arrowhead. + * Polygon done. Now move the first point towards the second so that + * the corners at the end of the line are inside the arrowhead. */ linePtr->coordPtr[0] = poly[0] - backup*cosTheta; @@ -2186,8 +2188,8 @@ ConfigureArrows(canvas, linePtr) coordPtr = linePtr->coordPtr + 2*(linePtr->numPoints-2); poly = linePtr->lastArrowPtr; if (poly == NULL) { - poly = (double *) ckalloc((unsigned) - (2*PTS_IN_ARROW*sizeof(double))); + poly = (double *) + ckalloc((unsigned) (2*PTS_IN_ARROW*sizeof(double))); poly[0] = poly[10] = coordPtr[2]; poly[1] = poly[11] = coordPtr[3]; linePtr->lastArrowPtr = poly; @@ -2203,10 +2205,10 @@ ConfigureArrows(canvas, linePtr) } vertX = poly[0] - shapeA*cosTheta; vertY = poly[1] - shapeA*sinTheta; - temp = shapeC*sinTheta; + temp = shapeC * sinTheta; poly[2] = poly[0] - shapeB*cosTheta + temp; poly[8] = poly[2] - 2*temp; - temp = shapeC*cosTheta; + temp = shapeC * cosTheta; poly[3] = poly[1] - shapeB*sinTheta - temp; poly[9] = poly[3] + 2*temp; poly[4] = poly[2]*fracHeight + vertX*(1.0-fracHeight); @@ -2225,15 +2227,13 @@ ConfigureArrows(canvas, linePtr) * * LineToPostscript -- * - * This procedure is called to generate Postscript for - * line items. + * This function is called to generate Postscript for line items. * * Results: - * The return value is a standard Tcl result. If an error - * occurs in generating Postscript then an error message is - * left in the interp's result, replacing whatever used - * to be there. If no error occurs, then Postscript for the - * item is appended to the result. + * The return value is a standard Tcl result. If an error occurs in + * generating Postscript then an error message is left in the interp's + * result, replacing whatever used to be there. If no error occurs, then + * Postscript for the item is appended to the result. * * Side effects: * None. @@ -2242,15 +2242,13 @@ ConfigureArrows(canvas, linePtr) */ static int -LineToPostscript(interp, canvas, itemPtr, prepass) - Tcl_Interp *interp; /* Leave Postscript or error message - * here. */ - Tk_Canvas canvas; /* Information about overall canvas. */ - Tk_Item *itemPtr; /* Item for which Postscript is - * wanted. */ - int prepass; /* 1 means this is a prepass to - * collect font information; 0 means - * final Postscript is being created. */ +LineToPostscript( + Tcl_Interp *interp, /* Leave Postscript or error message here. */ + Tk_Canvas canvas, /* Information about overall canvas. */ + Tk_Item *itemPtr, /* Item for which Postscript is wanted. */ + int prepass) /* 1 means this is a prepass to collect font + * information; 0 means final Postscript is + * being created. */ { LineItem *linePtr = (LineItem *) itemPtr; char buffer[64 + TCL_INTEGER_SPACE]; @@ -2299,24 +2297,23 @@ LineToPostscript(interp, canvas, itemPtr, prepass) linePtr->coordPtr[0], Tk_CanvasPsY(canvas, linePtr->coordPtr[1]), width/2.0, width/2.0); Tcl_AppendResult(interp, "matrix currentmatrix\n",buffer, - " scale 1 0 moveto 0 0 1 0 360 arc\nsetmatrix\n", (char *) NULL); - if (Tk_CanvasPsColor(interp, canvas, color) - != TCL_OK) { + " scale 1 0 moveto 0 0 1 0 360 arc\nsetmatrix\n", NULL); + if (Tk_CanvasPsColor(interp, canvas, color) != TCL_OK) { return TCL_ERROR; } if (stipple != None) { - Tcl_AppendResult(interp, "clip ", (char *) NULL); + Tcl_AppendResult(interp, "clip ", NULL); if (Tk_CanvasPsStipple(interp, canvas, stipple) != TCL_OK) { return TCL_ERROR; } } else { - Tcl_AppendResult(interp, "fill\n", (char *) NULL); + Tcl_AppendResult(interp, "fill\n", NULL); } return TCL_OK; } /* - * Generate a path for the line's center-line (do this differently - * for straight lines and smoothed lines). + * Generate a path for the line's center-line (do this differently for + * straight lines and smoothed lines). */ if ((!linePtr->smooth) || (linePtr->numPoints < 3)) { @@ -2327,29 +2324,27 @@ LineToPostscript(interp, canvas, itemPtr, prepass) linePtr->coordPtr, linePtr->numPoints, linePtr->splineSteps); } else { /* - * Special hack: Postscript printers don't appear to be able - * to turn a path drawn with "curveto"s into a clipping path - * without exceeding resource limits, so TkMakeBezierPostscript - * won't work for stippled curves. Instead, generate all of - * the intermediate points here and output them into the - * Postscript file with "lineto"s instead. + * Special hack: Postscript printers don't appear to be able to + * turn a path drawn with "curveto"s into a clipping path without + * exceeding resource limits, so TkMakeBezierPostscript won't work + * for stippled curves. Instead, generate all of the intermediate + * points here and output them into the Postscript file with + * "lineto"s instead. */ double staticPoints[2*MAX_STATIC_POINTS]; double *pointPtr; int numPoints; - numPoints = linePtr->smooth->coordProc(canvas, (double *) NULL, - linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, - (double *) NULL); + numPoints = linePtr->smooth->coordProc(canvas, NULL, + linePtr->numPoints, linePtr->splineSteps, NULL, NULL); pointPtr = staticPoints; if (numPoints > MAX_STATIC_POINTS) { pointPtr = (double *) ckalloc((unsigned) (numPoints * 2 * sizeof(double))); } numPoints = linePtr->smooth->coordProc(canvas, linePtr->coordPtr, - linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, - pointPtr); + linePtr->numPoints, linePtr->splineSteps, NULL, pointPtr); Tk_CanvasPsPath(interp, canvas, pointPtr, numPoints); if (pointPtr != staticPoints) { ckfree((char *) pointPtr); @@ -2367,17 +2362,16 @@ LineToPostscript(interp, canvas, itemPtr, prepass) } else if (linePtr->capStyle == CapProjecting) { style = "2 setlinecap\n"; } - Tcl_AppendResult(interp, style, (char *) NULL); + Tcl_AppendResult(interp, style, NULL); style = "0 setlinejoin\n"; if (linePtr->joinStyle == JoinRound) { style = "1 setlinejoin\n"; } else if (linePtr->joinStyle == JoinBevel) { style = "2 setlinejoin\n"; } - Tcl_AppendResult(interp, style, (char *) NULL); + Tcl_AppendResult(interp, style, NULL); - if (Tk_CanvasPsOutline(canvas, itemPtr, - &(linePtr->outline)) != TCL_OK) { + if (Tk_CanvasPsOutline(canvas, itemPtr, &(linePtr->outline)) != TCL_OK) { return TCL_ERROR; } @@ -2387,8 +2381,7 @@ LineToPostscript(interp, canvas, itemPtr, prepass) if (linePtr->firstArrowPtr != NULL) { if (stipple != None) { - Tcl_AppendResult(interp, "grestore gsave\n", - (char *) NULL); + Tcl_AppendResult(interp, "grestore gsave\n", NULL); } if (ArrowheadPostscript(interp, canvas, linePtr, linePtr->firstArrowPtr) != TCL_OK) { @@ -2397,7 +2390,7 @@ LineToPostscript(interp, canvas, itemPtr, prepass) } if (linePtr->lastArrowPtr != NULL) { if (stipple != None) { - Tcl_AppendResult(interp, "grestore gsave\n", (char *) NULL); + Tcl_AppendResult(interp, "grestore gsave\n", NULL); } if (ArrowheadPostscript(interp, canvas, linePtr, linePtr->lastArrowPtr) != TCL_OK) { @@ -2412,15 +2405,14 @@ LineToPostscript(interp, canvas, itemPtr, prepass) * * ArrowheadPostscript -- * - * This procedure is called to generate Postscript for - * an arrowhead for a line item. + * This function is called to generate Postscript for an arrowhead for a + * line item. * * Results: - * The return value is a standard Tcl result. If an error - * occurs in generating Postscript then an error message is - * left in the interp's result, replacing whatever used - * to be there. If no error occurs, then Postscript for the - * arrowhead is appended to the result. + * The return value is a standard Tcl result. If an error occurs in + * generating Postscript then an error message is left in the interp's + * result, replacing whatever used to be there. If no error occurs, then + * Postscript for the arrowhead is appended to the result. * * Side effects: * None. @@ -2429,14 +2421,13 @@ LineToPostscript(interp, canvas, itemPtr, prepass) */ static int -ArrowheadPostscript(interp, canvas, linePtr, arrowPtr) - Tcl_Interp *interp; /* Leave Postscript or error message - * here. */ - Tk_Canvas canvas; /* Information about overall canvas. */ - LineItem *linePtr; /* Line item for which Postscript is - * being generated. */ - double *arrowPtr; /* Pointer to first of five points - * describing arrowhead polygon. */ +ArrowheadPostscript( + Tcl_Interp *interp, /* Leave Postscript or error message here. */ + Tk_Canvas canvas, /* Information about overall canvas. */ + LineItem *linePtr, /* Line item for which Postscript is being + * generated. */ + double *arrowPtr) /* Pointer to first of five points describing + * arrowhead polygon. */ { Pixmap stipple; Tk_State state = linePtr->header.state; @@ -2458,13 +2449,20 @@ ArrowheadPostscript(interp, canvas, linePtr, arrowPtr) Tk_CanvasPsPath(interp, canvas, arrowPtr, PTS_IN_ARROW); if (stipple != None) { - Tcl_AppendResult(interp, "clip ", (char *) NULL); - if (Tk_CanvasPsStipple(interp, canvas, stipple) - != TCL_OK) { + Tcl_AppendResult(interp, "clip ", NULL); + if (Tk_CanvasPsStipple(interp, canvas, stipple) != TCL_OK) { return TCL_ERROR; } } else { - Tcl_AppendResult(interp, "fill\n", (char *) NULL); + Tcl_AppendResult(interp, "fill\n", NULL); } return TCL_OK; } + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |