diff options
Diffstat (limited to 'generic/tkSquare.c')
| -rw-r--r-- | generic/tkSquare.c | 333 |
1 files changed, 167 insertions, 166 deletions
diff --git a/generic/tkSquare.c b/generic/tkSquare.c index d3b6f04..0b984dd 100644 --- a/generic/tkSquare.c +++ b/generic/tkSquare.c @@ -1,18 +1,18 @@ -/* +/* * tkSquare.c -- * - * This module implements "square" widgets that are object - * based. A "square" is a widget that displays a single square that can - * be moved around and resized. This file is intended as an example - * of how to build a widget; it isn't included in the - * normal wish, but it is included in "tktest". + * This module implements "square" widgets that are object based. A + * "square" is a widget that displays a single square that can be moved + * around and resized. This file is intended as an example of how to + * build a widget; it isn't included in the normal wish, but it is + * included in "tktest". * * Copyright (c) 1997 Sun Microsystems, Inc. * - * 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. * - * RCS: @(#) $Id: tkSquare.c,v 1.5 2002/01/17 23:33:53 dgp Exp $ + * RCS: @(#) $Id: tkSquare.c,v 1.6 2005/11/15 15:18:22 dkf Exp $ */ #include "tkPort.h" @@ -21,14 +21,14 @@ #include "tkInt.h" /* - * A data structure of the following type is kept for each square - * widget managed by this file: + * A data structure of the following type is kept for each square widget + * managed by this file: */ typedef struct { - Tk_Window tkwin; /* Window that embodies the square. NULL - * means window has been deleted but - * widget record hasn't been cleaned up yet. */ + Tk_Window tkwin; /* Window that embodies the square. NULL means + * window has been deleted but widget record + * hasn't been cleaned up yet. */ Display *display; /* X's token for the window's display. */ Tcl_Interp *interp; /* Interpreter associated with widget. */ Tcl_Command widgetCmd; /* Token for square's widget command. */ @@ -49,11 +49,11 @@ typedef struct { Tcl_Obj *reliefPtr; GC gc; /* Graphics context for copying from * off-screen pixmap onto screen. */ - Tcl_Obj *doubleBufferPtr; /* Non-zero means double-buffer redisplay - * with pixmap; zero means draw straight - * onto the display. */ - int updatePending; /* Non-zero means a call to SquareDisplay - * has already been scheduled. */ + Tcl_Obj *doubleBufferPtr; /* Non-zero means double-buffer redisplay with + * pixmap; zero means draw straight onto the + * display. */ + int updatePending; /* Non-zero means a call to SquareDisplay has + * already been scheduled. */ } Square; /* @@ -64,16 +64,16 @@ static Tk_OptionSpec optionSpecs[] = { {TK_OPTION_BORDER, "-background", "background", "Background", "#d9d9d9", Tk_Offset(Square, bgBorderPtr), -1, 0, (ClientData) "white"}, - {TK_OPTION_SYNONYM, "-bd", (char *) NULL, (char *) NULL, - (char *) NULL, 0, -1, 0, (ClientData) "-borderwidth"}, - {TK_OPTION_SYNONYM, "-bg", (char *) NULL, (char *) NULL, - (char *) NULL, 0, -1, 0, (ClientData) "-background"}, + {TK_OPTION_SYNONYM, "-bd", NULL, NULL, NULL, 0, -1, 0, + (ClientData) "-borderwidth"}, + {TK_OPTION_SYNONYM, "-bg", NULL, NULL, NULL, 0, -1, 0, + (ClientData) "-background"}, {TK_OPTION_PIXELS, "-borderwidth", "borderWidth", "BorderWidth", "2", Tk_Offset(Square, borderWidthPtr), -1}, {TK_OPTION_BOOLEAN, "-dbl", "doubleBuffer", "DoubleBuffer", "1", Tk_Offset(Square, doubleBufferPtr), -1}, - {TK_OPTION_SYNONYM, "-fg", (char *) NULL, (char *) NULL, - (char *) NULL, 0, -1, 0, (ClientData) "-foreground"}, + {TK_OPTION_SYNONYM, "-fg", NULL, NULL, NULL, 0, -1, 0, + (ClientData) "-foreground"}, {TK_OPTION_BORDER, "-foreground", "foreground", "Foreground", "#b03060", Tk_Offset(Square, fgBorderPtr), -1, 0, (ClientData) "black"}, @@ -92,28 +92,26 @@ static Tk_OptionSpec optionSpecs[] = { * Forward declarations for procedures defined later in this file: */ -int SquareObjCmd _ANSI_ARGS_((ClientData clientData, - Tcl_Interp *interp, int objc, - Tcl_Obj * CONST objv[])); -static void SquareDeletedProc _ANSI_ARGS_(( - ClientData clientData)); -static int SquareConfigure _ANSI_ARGS_((Tcl_Interp *interp, - Square *squarePtr)); -static void SquareDestroy _ANSI_ARGS_((char *memPtr)); -static void SquareDisplay _ANSI_ARGS_((ClientData clientData)); -static void KeepInWindow _ANSI_ARGS_((Square *squarePtr)); -static void SquareObjEventProc _ANSI_ARGS_((ClientData clientData, - XEvent *eventPtr)); -static int SquareWidgetObjCmd _ANSI_ARGS_((ClientData clientData, - Tcl_Interp *, int objc, Tcl_Obj * CONST objv[])); +int SquareObjCmd(ClientData clientData, + Tcl_Interp *interp, int objc, + Tcl_Obj * CONST objv[]); +static void SquareDeletedProc(ClientData clientData); +static int SquareConfigure(Tcl_Interp *interp, Square *squarePtr); +static void SquareDestroy(char *memPtr); +static void SquareDisplay(ClientData clientData); +static void KeepInWindow(Square *squarePtr); +static void SquareObjEventProc(ClientData clientData, + XEvent *eventPtr); +static int SquareWidgetObjCmd(ClientData clientData, + Tcl_Interp *, int objc, Tcl_Obj * CONST objv[]); /* *-------------------------------------------------------------- * * SquareCmd -- * - * This procedure is invoked to process the "square" Tcl - * command. It creates a new "square" widget. + * This procedure is invoked to process the "square" Tcl command. It + * creates a new "square" widget. * * Results: * A standard Tcl result. @@ -125,11 +123,11 @@ static int SquareWidgetObjCmd _ANSI_ARGS_((ClientData clientData, */ int -SquareObjCmd(clientData, interp, objc, objv) - ClientData clientData; /* NULL. */ - Tcl_Interp *interp; /* Current interpreter. */ - int objc; /* Number of arguments. */ - Tcl_Obj * CONST objv[]; /* Argument objects. */ +SquareObjCmd( + ClientData clientData, /* NULL. */ + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *CONST objv[]) /* Argument objects. */ { Square *squarePtr; Tk_Window tkwin; @@ -140,39 +138,38 @@ SquareObjCmd(clientData, interp, objc, objv) return TCL_ERROR; } - tkwin = Tk_CreateWindowFromPath(interp, Tk_MainWindow(interp), - Tcl_GetStringFromObj(objv[1], NULL), (char *) NULL); + tkwin = Tk_CreateWindowFromPath(interp, Tk_MainWindow(interp), + Tcl_GetString(objv[1]), NULL); if (tkwin == NULL) { return TCL_ERROR; } Tk_SetClass(tkwin, "Square"); /* - * Create the option table for this widget class. If it has - * already been created, the refcount will get bumped and just - * the pointer will be returned. The refcount getting bumped - * does not concern us, because Tk will ensure the table is - * deleted when the interpreter is destroyed. + * Create the option table for this widget class. If it has already been + * created, the refcount will get bumped and just the pointer will be + * returned. The refcount getting bumped does not concern us, because Tk + * will ensure the table is deleted when the interpreter is destroyed. */ optionTable = Tk_CreateOptionTable(interp, optionSpecs); /* - * Allocate and initialize the widget record. The memset allows - * us to set just the non-NULL/0 items. + * Allocate and initialize the widget record. The memset allows us to set + * just the non-NULL/0 items. */ - squarePtr = (Square *) ckalloc(sizeof(Square)); + squarePtr = (Square *) ckalloc(sizeof(Square)); memset((void *) squarePtr, 0, (sizeof(Square))); - squarePtr->tkwin = tkwin; - squarePtr->display = Tk_Display(tkwin); - squarePtr->interp = interp; - squarePtr->widgetCmd = Tcl_CreateObjCommand(interp, + squarePtr->tkwin = tkwin; + squarePtr->display = Tk_Display(tkwin); + squarePtr->interp = interp; + squarePtr->widgetCmd = Tcl_CreateObjCommand(interp, Tk_PathName(squarePtr->tkwin), SquareWidgetObjCmd, (ClientData) squarePtr, SquareDeletedProc); - squarePtr->gc = None; - squarePtr->optionTable = optionTable; + squarePtr->gc = None; + squarePtr->optionTable = optionTable; if (Tk_InitOptions(interp, (char *) squarePtr, optionTable, tkwin) != TCL_OK) { @@ -184,7 +181,7 @@ SquareObjCmd(clientData, interp, objc, objv) Tk_CreateEventHandler(squarePtr->tkwin, ExposureMask|StructureNotifyMask, SquareObjEventProc, (ClientData) squarePtr); if (Tk_SetOptions(interp, (char *) squarePtr, optionTable, objc - 2, - objv + 2, tkwin, NULL, (int *) NULL) != TCL_OK) { + objv + 2, tkwin, NULL, NULL) != TCL_OK) { goto error; } if (SquareConfigure(interp, squarePtr) != TCL_OK) { @@ -195,7 +192,7 @@ SquareObjCmd(clientData, interp, objc, objv) Tcl_NewStringObj(Tk_PathName(squarePtr->tkwin), -1)); return TCL_OK; -error: + error: Tk_DestroyWindow(squarePtr->tkwin); return TCL_ERROR; } @@ -205,9 +202,9 @@ error: * * SquareWidgetObjCmd -- * - * This procedure is invoked to process the Tcl command - * that corresponds to a widget managed by this module. - * See the user documentation for details on what it does. + * This procedure is invoked to process the Tcl command that corresponds + * to a widget managed by this module. See the user documentation for + * details on what it does. * * Results: * A standard Tcl result. @@ -219,15 +216,15 @@ error: */ static int -SquareWidgetObjCmd(clientData, interp, objc, objv) - ClientData clientData; /* Information about square widget. */ - Tcl_Interp *interp; /* Current interpreter. */ - int objc; /* Number of arguments. */ - Tcl_Obj * CONST objv[]; /* Argument objects. */ +SquareWidgetObjCmd( + ClientData clientData, /* Information about square widget. */ + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj * CONST objv[]) /* Argument objects. */ { Square *squarePtr = (Square *) clientData; int result = TCL_OK; - static CONST char *squareOptions[] = {"cget", "configure", (char *) NULL}; + static CONST char *squareOptions[] = {"cget", "configure", NULL}; enum { SQUARE_CGET, SQUARE_CONFIGURE }; @@ -245,58 +242,55 @@ SquareWidgetObjCmd(clientData, interp, objc, objv) } Tcl_Preserve((ClientData) squarePtr); - + switch (index) { - case SQUARE_CGET: { - if (objc != 3) { - Tcl_WrongNumArgs(interp, 2, objv, "option"); - goto error; + case SQUARE_CGET: + if (objc != 3) { + Tcl_WrongNumArgs(interp, 2, objv, "option"); + goto error; + } + resultObjPtr = Tk_GetOptionValue(interp, (char *) squarePtr, + squarePtr->optionTable, objv[2], squarePtr->tkwin); + if (resultObjPtr == NULL) { + result = TCL_ERROR; + } else { + Tcl_SetObjResult(interp, resultObjPtr); + } + break; + case SQUARE_CONFIGURE: + resultObjPtr = NULL; + if (objc == 2) { + resultObjPtr = Tk_GetOptionInfo(interp, (char *) squarePtr, + squarePtr->optionTable, NULL, squarePtr->tkwin); + if (resultObjPtr == NULL) { + result = TCL_ERROR; } - resultObjPtr = Tk_GetOptionValue(interp, (char *) squarePtr, + } else if (objc == 3) { + resultObjPtr = Tk_GetOptionInfo(interp, (char *) squarePtr, squarePtr->optionTable, objv[2], squarePtr->tkwin); if (resultObjPtr == NULL) { result = TCL_ERROR; - } else { - Tcl_SetObjResult(interp, resultObjPtr); } - break; - } - case SQUARE_CONFIGURE: { - resultObjPtr = NULL; - if (objc == 2) { - resultObjPtr = Tk_GetOptionInfo(interp, (char *) squarePtr, - squarePtr->optionTable, (Tcl_Obj *) NULL, - squarePtr->tkwin); - if (resultObjPtr == NULL) { - result = TCL_ERROR; - } - } else if (objc == 3) { - resultObjPtr = Tk_GetOptionInfo(interp, (char *) squarePtr, - squarePtr->optionTable, objv[2], squarePtr->tkwin); - if (resultObjPtr == NULL) { - result = TCL_ERROR; - } - } else { - result = Tk_SetOptions(interp, (char *) squarePtr, - squarePtr->optionTable, objc - 2, objv + 2, - squarePtr->tkwin, NULL, (int *) NULL); - if (result == TCL_OK) { - result = SquareConfigure(interp, squarePtr); - } - if (!squarePtr->updatePending) { - Tcl_DoWhenIdle(SquareDisplay, (ClientData) squarePtr); - squarePtr->updatePending = 1; - } + } else { + result = Tk_SetOptions(interp, (char *) squarePtr, + squarePtr->optionTable, objc - 2, objv + 2, + squarePtr->tkwin, NULL, NULL); + if (result == TCL_OK) { + result = SquareConfigure(interp, squarePtr); } - if (resultObjPtr != NULL) { - Tcl_SetObjResult(interp, resultObjPtr); + if (!squarePtr->updatePending) { + Tcl_DoWhenIdle(SquareDisplay, (ClientData) squarePtr); + squarePtr->updatePending = 1; } } + if (resultObjPtr != NULL) { + Tcl_SetObjResult(interp, resultObjPtr); + } } Tcl_Release((ClientData) squarePtr); return result; - error: + error: Tcl_Release((ClientData) squarePtr); return TCL_ERROR; } @@ -306,37 +300,36 @@ SquareWidgetObjCmd(clientData, interp, objc, objv) * * SquareConfigure -- * - * This procedure is called to process an argv/argc list in - * conjunction with the Tk option database to configure (or - * reconfigure) a square widget. + * This procedure is called to process an argv/argc list in conjunction + * with the Tk option database to configure (or reconfigure) a square + * widget. * * Results: - * The return value is a standard Tcl result. If TCL_ERROR is - * returned, then the interp's result contains an error message. + * The return value is a standard Tcl result. If TCL_ERROR is returned, + * then the interp's result contains an error message. * * Side effects: - * Configuration information, such as colors, border width, - * etc. get set for squarePtr; old resources get freed, - * if there were any. + * Configuration information, such as colors, border width, etc. get set + * for squarePtr; old resources get freed, if there were any. * *---------------------------------------------------------------------- */ static int -SquareConfigure(interp, squarePtr) - Tcl_Interp *interp; /* Used for error reporting. */ - Square *squarePtr; /* Information about widget. */ +SquareConfigure( + Tcl_Interp *interp, /* Used for error reporting. */ + Square *squarePtr) /* Information about widget. */ { int borderWidth; Tk_3DBorder bgBorder; int doubleBuffer; /* - * Set the background for the window and create a graphics context - * for use during redisplay. + * Set the background for the window and create a graphics context for use + * during redisplay. */ - bgBorder = Tk_Get3DBorderFromObj(squarePtr->tkwin, + bgBorder = Tk_Get3DBorderFromObj(squarePtr->tkwin, squarePtr->bgBorderPtr); Tk_SetWindowBackground(squarePtr->tkwin, Tk_3DBorderColor(bgBorder)->pixel); @@ -350,8 +343,8 @@ SquareConfigure(interp, squarePtr) } /* - * Register the desired geometry for the window. Then arrange for - * the window to be redisplayed. + * Register the desired geometry for the window. Then arrange for the + * window to be redisplayed. */ Tk_GeometryRequest(squarePtr->tkwin, 200, 150); @@ -371,23 +364,23 @@ SquareConfigure(interp, squarePtr) * * SquareObjEventProc -- * - * This procedure is invoked by the Tk dispatcher for various - * events on squares. + * This procedure is invoked by the Tk dispatcher for various events on + * squares. * * Results: * None. * * Side effects: - * When the window gets deleted, internal structures get - * cleaned up. When it gets exposed, it is redisplayed. + * When the window gets deleted, internal structures get cleaned up. When + * it gets exposed, it is redisplayed. * *-------------------------------------------------------------- */ static void -SquareObjEventProc(clientData, eventPtr) - ClientData clientData; /* Information about window. */ - XEvent *eventPtr; /* Information about event. */ +SquareObjEventProc( + ClientData clientData, /* Information about window. */ + XEvent *eventPtr) /* Information about event. */ { Square *squarePtr = (Square *) clientData; @@ -425,9 +418,9 @@ SquareObjEventProc(clientData, eventPtr) * * SquareDeletedProc -- * - * This procedure is invoked when a widget command is deleted. If - * the widget isn't already in the process of being destroyed, - * this command destroys it. + * This procedure is invoked when a widget command is deleted. If the + * widget isn't already in the process of being destroyed, this command + * destroys it. * * Results: * None. @@ -439,17 +432,17 @@ SquareObjEventProc(clientData, eventPtr) */ static void -SquareDeletedProc(clientData) - ClientData clientData; /* Pointer to widget record for widget. */ +SquareDeletedProc( + ClientData clientData) /* Pointer to widget record for widget. */ { Square *squarePtr = (Square *) clientData; Tk_Window tkwin = squarePtr->tkwin; /* - * This procedure could be invoked either because the window was - * destroyed and the command was then deleted (in which case tkwin - * is NULL) or because the command was deleted, and then this procedure - * destroys the widget. + * This procedure could be invoked either because the window was destroyed + * and the command was then deleted (in which case tkwin is NULL) or + * because the command was deleted, and then this procedure destroys the + * widget. */ if (tkwin != NULL) { @@ -462,9 +455,9 @@ SquareDeletedProc(clientData) * * SquareDisplay -- * - * This procedure redraws the contents of a square window. - * It is invoked as a do-when-idle handler, so it only runs - * when there's nothing else for the application to do. + * This procedure redraws the contents of a square window. It is invoked + * as a do-when-idle handler, so it only runs when there's nothing else + * for the application to do. * * Results: * None. @@ -476,8 +469,8 @@ SquareDeletedProc(clientData) */ static void -SquareDisplay(clientData) - ClientData clientData; /* Information about window. */ +SquareDisplay( + ClientData clientData) /* Information about window. */ { Square *squarePtr = (Square *) clientData; Tk_Window tkwin = squarePtr->tkwin; @@ -512,7 +505,7 @@ SquareDisplay(clientData) Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->borderWidthPtr, &borderWidth); - bgBorder = Tk_Get3DBorderFromObj(squarePtr->tkwin, + bgBorder = Tk_Get3DBorderFromObj(squarePtr->tkwin, squarePtr->bgBorderPtr); Tk_GetReliefFromObj(NULL, squarePtr->reliefPtr, &relief); Tk_Fill3DRectangle(tkwin, d, bgBorder, 0, 0, Tk_Width(tkwin), @@ -523,9 +516,9 @@ SquareDisplay(clientData) */ Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->sizeObjPtr, &size); - fgBorder = Tk_Get3DBorderFromObj(squarePtr->tkwin, + fgBorder = Tk_Get3DBorderFromObj(squarePtr->tkwin, squarePtr->fgBorderPtr); - Tk_Fill3DRectangle(tkwin, d, fgBorder, squarePtr->x, squarePtr->y, size, + Tk_Fill3DRectangle(tkwin, d, fgBorder, squarePtr->x, squarePtr->y, size, size, borderWidth, TK_RELIEF_RAISED); /* @@ -545,9 +538,9 @@ SquareDisplay(clientData) * * SquareDestroy -- * - * This procedure is invoked by Tcl_EventuallyFree or Tcl_Release - * to clean up the internal structure of a square at a safe time - * (when no-one is using it anymore). + * This procedure is invoked by Tcl_EventuallyFree or Tcl_Release to + * clean up the internal structure of a square at a safe time (when + * no-one is using it anymore). * * Results: * None. @@ -559,11 +552,11 @@ SquareDisplay(clientData) */ static void -SquareDestroy(memPtr) - char *memPtr; /* Info about square widget. */ +SquareDestroy( + char *memPtr) /* Info about square widget. */ { Square *squarePtr = (Square *) memPtr; - + ckfree((char *) squarePtr); } @@ -572,31 +565,31 @@ SquareDestroy(memPtr) * * KeepInWindow -- * - * Adjust the position of the square if necessary to keep it in - * the widget's window. + * Adjust the position of the square if necessary to keep it in the + * widget's window. * * Results: * None. * * Side effects: - * The x and y position of the square are adjusted if necessary - * to keep the square in the window. + * The x and y position of the square are adjusted if necessary to keep + * the square in the window. * *---------------------------------------------------------------------- */ static void -KeepInWindow(squarePtr) - register Square *squarePtr; /* Pointer to widget record. */ +KeepInWindow( + register Square *squarePtr) /* Pointer to widget record. */ { int i, bd, relief; int borderWidth, size; Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->borderWidthPtr, &borderWidth); - Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->xPtr, + Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->xPtr, &squarePtr->x); - Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->yPtr, + Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->yPtr, &squarePtr->y); Tk_GetPixelsFromObj(NULL, squarePtr->tkwin, squarePtr->sizeObjPtr, &size); Tk_GetReliefFromObj(NULL, squarePtr->reliefPtr, &relief); @@ -619,3 +612,11 @@ KeepInWindow(squarePtr) squarePtr->y = bd; } } + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |