diff options
Diffstat (limited to 'tk8.6/generic/tkCanvWind.c')
| -rw-r--r-- | tk8.6/generic/tkCanvWind.c | 1095 |
1 files changed, 1095 insertions, 0 deletions
diff --git a/tk8.6/generic/tkCanvWind.c b/tk8.6/generic/tkCanvWind.c new file mode 100644 index 0000000..f73546f --- /dev/null +++ b/tk8.6/generic/tkCanvWind.c @@ -0,0 +1,1095 @@ +/* + * tkCanvWind.c -- + * + * This file implements window items for canvas widgets. + * + * Copyright (c) 1992-1994 The Regents of the University of California. + * Copyright (c) 1994-1997 Sun Microsystems, Inc. + * + * See the file "license.terms" for information on usage and redistribution of + * this file, and for a DISCLAIMER OF ALL WARRANTIES. + */ + +#include "tkInt.h" +#include "tkCanvas.h" + +/* + * The structure below defines the record for each window item. + */ + +typedef struct WindowItem { + Tk_Item header; /* Generic stuff that's the same for all + * types. MUST BE FIRST IN STRUCTURE. */ + double x, y; /* Coordinates of positioning point for + * window. */ + Tk_Window tkwin; /* Window associated with item. NULL means + * window has been destroyed. */ + int width; /* Width to use for window (<= 0 means use + * window's requested width). */ + int height; /* Width to use for window (<= 0 means use + * window's requested width). */ + Tk_Anchor anchor; /* Where to anchor window relative to + * (x,y). */ + Tk_Canvas canvas; /* Canvas containing this item. */ +} WindowItem; + +/* + * Information used for parsing configuration specs: + */ + +static const Tk_CustomOption stateOption = { + TkStateParseProc, TkStatePrintProc, INT2PTR(2) +}; +static const Tk_CustomOption tagsOption = { + Tk_CanvasTagsParseProc, Tk_CanvasTagsPrintProc, NULL +}; + +static const Tk_ConfigSpec configSpecs[] = { + {TK_CONFIG_ANCHOR, "-anchor", NULL, NULL, + "center", Tk_Offset(WindowItem, anchor), TK_CONFIG_DONT_SET_DEFAULT, NULL}, + {TK_CONFIG_PIXELS, "-height", NULL, NULL, + "0", Tk_Offset(WindowItem, height), TK_CONFIG_DONT_SET_DEFAULT, NULL}, + {TK_CONFIG_CUSTOM, "-state", NULL, NULL, + NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, &stateOption}, + {TK_CONFIG_CUSTOM, "-tags", NULL, NULL, + NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, + {TK_CONFIG_PIXELS, "-width", NULL, NULL, + "0", Tk_Offset(WindowItem, width), TK_CONFIG_DONT_SET_DEFAULT, NULL}, + {TK_CONFIG_WINDOW, "-window", NULL, NULL, + NULL, Tk_Offset(WindowItem, tkwin), TK_CONFIG_NULL_OK, NULL}, + {TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0, NULL} +}; + +/* + * Prototypes for functions defined in this file: + */ + +static void ComputeWindowBbox(Tk_Canvas canvas, + WindowItem *winItemPtr); +static int ConfigureWinItem(Tcl_Interp *interp, + Tk_Canvas canvas, Tk_Item *itemPtr, int objc, + Tcl_Obj *const objv[], int flags); +static int CreateWinItem(Tcl_Interp *interp, + Tk_Canvas canvas, struct Tk_Item *itemPtr, + int objc, Tcl_Obj *const objv[]); +static void DeleteWinItem(Tk_Canvas canvas, + Tk_Item *itemPtr, Display *display); +static void DisplayWinItem(Tk_Canvas canvas, + Tk_Item *itemPtr, Display *display, Drawable dst, + int x, int y, int width, int height); +static void ScaleWinItem(Tk_Canvas canvas, + Tk_Item *itemPtr, double originX, double originY, + double scaleX, double scaleY); +static void TranslateWinItem(Tk_Canvas canvas, + Tk_Item *itemPtr, double deltaX, double deltaY); +static int WinItemCoords(Tcl_Interp *interp, + Tk_Canvas canvas, Tk_Item *itemPtr, int objc, + Tcl_Obj *const objv[]); +static void WinItemLostSlaveProc(ClientData clientData, + Tk_Window tkwin); +static void WinItemRequestProc(ClientData clientData, + Tk_Window tkwin); +static void WinItemStructureProc(ClientData clientData, + XEvent *eventPtr); +static int WinItemToArea(Tk_Canvas canvas, + Tk_Item *itemPtr, double *rectPtr); +static int WinItemToPostscript(Tcl_Interp *interp, + Tk_Canvas canvas, Tk_Item *itemPtr, int prepass); +static double WinItemToPoint(Tk_Canvas canvas, + Tk_Item *itemPtr, double *pointPtr); +#ifdef X_GetImage +static int xerrorhandler(ClientData clientData, XErrorEvent *e); +#endif +static int CanvasPsWindow(Tcl_Interp *interp, + Tk_Window tkwin, Tk_Canvas canvas, double x, + double y, int width, int height); + +/* + * The structure below defines the window item type by means of functions + * that can be invoked by generic item code. + */ + +Tk_ItemType tkWindowType = { + "window", /* name */ + sizeof(WindowItem), /* itemSize */ + CreateWinItem, /* createProc */ + configSpecs, /* configSpecs */ + ConfigureWinItem, /* configureProc */ + WinItemCoords, /* coordProc */ + DeleteWinItem, /* deleteProc */ + DisplayWinItem, /* displayProc */ + 1|TK_CONFIG_OBJS, /* flags */ + WinItemToPoint, /* pointProc */ + WinItemToArea, /* areaProc */ + WinItemToPostscript, /* postscriptProc */ + ScaleWinItem, /* scaleProc */ + TranslateWinItem, /* translateProc */ + NULL, /* indexProc */ + NULL, /* cursorProc */ + NULL, /* selectionProc */ + NULL, /* insertProc */ + NULL, /* dTextProc */ + NULL, /* nextPtr */ + NULL, 0, NULL, NULL +}; + +/* + * The structure below defines the official type record for the canvas (as + * geometry manager): + */ + +static const Tk_GeomMgr canvasGeomType = { + "canvas", /* name */ + WinItemRequestProc, /* requestProc */ + WinItemLostSlaveProc, /* lostSlaveProc */ +}; + +/* + *-------------------------------------------------------------- + * + * CreateWinItem -- + * + * This function is invoked to create a new window 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. + * + * Side effects: + * A new window item is created. + * + *-------------------------------------------------------------- + */ + +static int +CreateWinItem( + 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 window. */ +{ + WindowItem *winItemPtr = (WindowItem *) itemPtr; + int i; + + if (objc == 0) { + Tcl_Panic("canvas did not pass any coords"); + } + + /* + * Initialize item's record. + */ + + winItemPtr->tkwin = NULL; + winItemPtr->width = 0; + winItemPtr->height = 0; + winItemPtr->anchor = TK_ANCHOR_CENTER; + winItemPtr->canvas = canvas; + + /* + * Process the arguments to fill in the item record. Only 1 (list) or 2 (x + * y) coords are allowed. + */ + + if (objc == 1) { + i = 1; + } else { + const char *arg = Tcl_GetString(objv[1]); + + i = 2; + if ((arg[0] == '-') && (arg[1] >= 'a') && (arg[1] <= 'z')) { + i = 1; + } + } + if (WinItemCoords(interp, canvas, itemPtr, i, objv) != TCL_OK) { + goto error; + } + if (ConfigureWinItem(interp, canvas, itemPtr, objc-i, objv+i, 0) + == TCL_OK) { + return TCL_OK; + } + + error: + DeleteWinItem(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas))); + return TCL_ERROR; +} + +/* + *-------------------------------------------------------------- + * + * WinItemCoords -- + * + * This function is invoked to process the "coords" widget command on + * window items. See the user documentation for details on what it does. + * + * Results: + * Returns TCL_OK or TCL_ERROR, and sets the interp's result. + * + * Side effects: + * The coordinates for the given item may be changed. + * + *-------------------------------------------------------------- + */ + +static int +WinItemCoords( + 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, ... */ +{ + WindowItem *winItemPtr = (WindowItem *) itemPtr; + + if (objc == 0) { + Tcl_Obj *objs[2]; + + objs[0] = Tcl_NewDoubleObj(winItemPtr->x); + objs[1] = Tcl_NewDoubleObj(winItemPtr->y); + Tcl_SetObjResult(interp, Tcl_NewListObj(2, objs)); + } else if (objc < 3) { + if (objc==1) { + if (Tcl_ListObjGetElements(interp, objv[0], &objc, + (Tcl_Obj ***) &objv) != TCL_OK) { + return TCL_ERROR; + } else if (objc != 2) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "wrong # coordinates: expected 2, got %d", objc)); + Tcl_SetErrorCode(interp, "TK", "CANVAS", "COORDS", "WINDOW", + NULL); + return TCL_ERROR; + } + } + if ((Tk_CanvasGetCoordFromObj(interp, canvas, objv[0], &winItemPtr->x) + != TCL_OK) || (Tk_CanvasGetCoordFromObj(interp, canvas, objv[1], + &winItemPtr->y) != TCL_OK)) { + return TCL_ERROR; + } + ComputeWindowBbox(canvas, winItemPtr); + } else { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "wrong # coordinates: expected 0 or 2, got %d", objc)); + Tcl_SetErrorCode(interp, "TK", "CANVAS", "COORDS", "WINDOW", NULL); + return TCL_ERROR; + } + return TCL_OK; +} + +/* + *-------------------------------------------------------------- + * + * ConfigureWinItem -- + * + * This function is invoked to configure various aspects of a window + * item, such as its anchor position. + * + * Results: + * A standard Tcl result code. If an error occurs, then an error message + * is left in the interp's result. + * + * Side effects: + * Configuration information may be set for itemPtr. + * + *-------------------------------------------------------------- + */ + +static int +ConfigureWinItem( + Tcl_Interp *interp, /* Used for error reporting. */ + Tk_Canvas canvas, /* Canvas containing itemPtr. */ + Tk_Item *itemPtr, /* Window 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. */ +{ + WindowItem *winItemPtr = (WindowItem *) itemPtr; + Tk_Window oldWindow; + Tk_Window canvasTkwin; + + oldWindow = winItemPtr->tkwin; + canvasTkwin = Tk_CanvasTkwin(canvas); + if (TCL_OK != Tk_ConfigureWidget(interp, canvasTkwin, configSpecs, objc, + (const char **) objv, (char *) winItemPtr, flags|TK_CONFIG_OBJS)) { + return TCL_ERROR; + } + + /* + * A few of the options require additional processing. + */ + + if (oldWindow != winItemPtr->tkwin) { + if (oldWindow != NULL) { + Tk_DeleteEventHandler(oldWindow, StructureNotifyMask, + WinItemStructureProc, winItemPtr); + Tk_ManageGeometry(oldWindow, NULL, NULL); + Tk_UnmaintainGeometry(oldWindow, canvasTkwin); + Tk_UnmapWindow(oldWindow); + } + if (winItemPtr->tkwin != NULL) { + Tk_Window ancestor, parent; + + /* + * Make sure that the canvas is either the parent of the window + * associated with the item or a descendant of that parent. Also, + * don't allow a top-of-hierarchy window to be managed inside a + * canvas. + */ + + parent = Tk_Parent(winItemPtr->tkwin); + for (ancestor = canvasTkwin ;; ancestor = Tk_Parent(ancestor)) { + if (ancestor == parent) { + break; + } + if (((Tk_FakeWin *) ancestor)->flags & TK_TOP_HIERARCHY) { + goto badWindow; + } + } + if (((Tk_FakeWin *) winItemPtr->tkwin)->flags & TK_TOP_HIERARCHY){ + goto badWindow; + } + if (winItemPtr->tkwin == canvasTkwin) { + goto badWindow; + } + Tk_CreateEventHandler(winItemPtr->tkwin, StructureNotifyMask, + WinItemStructureProc, winItemPtr); + Tk_ManageGeometry(winItemPtr->tkwin, &canvasGeomType, winItemPtr); + } + } + if ((winItemPtr->tkwin != NULL) + && (itemPtr->state == TK_STATE_HIDDEN)) { + if (canvasTkwin == Tk_Parent(winItemPtr->tkwin)) { + Tk_UnmapWindow(winItemPtr->tkwin); + } else { + Tk_UnmaintainGeometry(winItemPtr->tkwin, canvasTkwin); + } + } + + ComputeWindowBbox(canvas, winItemPtr); + return TCL_OK; + + badWindow: + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "can't use %s in a window item of this canvas", + Tk_PathName(winItemPtr->tkwin))); + Tcl_SetErrorCode(interp, "TK", "GEOMETRY", "HIERARCHY", NULL); + winItemPtr->tkwin = NULL; + return TCL_ERROR; +} + +/* + *-------------------------------------------------------------- + * + * DeleteWinItem -- + * + * This function is called to clean up the data structure associated with + * a window item. + * + * Results: + * None. + * + * Side effects: + * Resources associated with itemPtr are released. + * + *-------------------------------------------------------------- + */ + +static void +DeleteWinItem( + Tk_Canvas canvas, /* Overall info about widget. */ + Tk_Item *itemPtr, /* Item that is being deleted. */ + Display *display) /* Display containing window for canvas. */ +{ + WindowItem *winItemPtr = (WindowItem *) itemPtr; + Tk_Window canvasTkwin = Tk_CanvasTkwin(canvas); + + if (winItemPtr->tkwin != NULL) { + Tk_DeleteEventHandler(winItemPtr->tkwin, StructureNotifyMask, + WinItemStructureProc, winItemPtr); + Tk_ManageGeometry(winItemPtr->tkwin, NULL, NULL); + if (canvasTkwin != Tk_Parent(winItemPtr->tkwin)) { + Tk_UnmaintainGeometry(winItemPtr->tkwin, canvasTkwin); + } + Tk_UnmapWindow(winItemPtr->tkwin); + } +} + +/* + *-------------------------------------------------------------- + * + * ComputeWindowBbox -- + * + * This function is invoked to compute the bounding box of all the pixels + * that may be drawn as part of a window item. This function is where the + * child window's placement is computed. + * + * Results: + * None. + * + * Side effects: + * The fields x1, y1, x2, and y2 are updated in the header for itemPtr. + * + *-------------------------------------------------------------- + */ + +static void +ComputeWindowBbox( + Tk_Canvas canvas, /* Canvas that contains item. */ + WindowItem *winItemPtr) /* Item whose bbox is to be recomputed. */ +{ + int width, height, x, y; + Tk_State state = winItemPtr->header.state; + + x = (int) (winItemPtr->x + ((winItemPtr->x >= 0) ? 0.5 : - 0.5)); + y = (int) (winItemPtr->y + ((winItemPtr->y >= 0) ? 0.5 : - 0.5)); + + if (state == TK_STATE_NULL) { + state = Canvas(canvas)->canvas_state; + } + if ((winItemPtr->tkwin == NULL) || (state == TK_STATE_HIDDEN)) { + /* + * There is no window for this item yet. Just give it a 1x1 bounding + * box. Don't give it a 0x0 bounding box; there are strange cases + * where this bounding box might be used as the dimensions of the + * window, and 0x0 causes problems under X. + */ + + winItemPtr->header.x1 = x; + winItemPtr->header.x2 = winItemPtr->header.x1 + 1; + winItemPtr->header.y1 = y; + winItemPtr->header.y2 = winItemPtr->header.y1 + 1; + return; + } + + /* + * Compute dimensions of window. + */ + + width = winItemPtr->width; + if (width <= 0) { + width = Tk_ReqWidth(winItemPtr->tkwin); + if (width <= 0) { + width = 1; + } + } + height = winItemPtr->height; + if (height <= 0) { + height = Tk_ReqHeight(winItemPtr->tkwin); + if (height <= 0) { + height = 1; + } + } + + /* + * Compute location of window, using anchor information. + */ + + switch (winItemPtr->anchor) { + case TK_ANCHOR_N: + x -= width/2; + break; + case TK_ANCHOR_NE: + x -= width; + break; + case TK_ANCHOR_E: + x -= width; + y -= height/2; + break; + case TK_ANCHOR_SE: + x -= width; + y -= height; + break; + case TK_ANCHOR_S: + x -= width/2; + y -= height; + break; + case TK_ANCHOR_SW: + y -= height; + break; + case TK_ANCHOR_W: + y -= height/2; + break; + case TK_ANCHOR_NW: + break; + case TK_ANCHOR_CENTER: + x -= width/2; + y -= height/2; + break; + } + + /* + * Store the information in the item header. + */ + + winItemPtr->header.x1 = x; + winItemPtr->header.y1 = y; + winItemPtr->header.x2 = x + width; + winItemPtr->header.y2 = y + height; +} + +/* + *-------------------------------------------------------------- + * + * DisplayWinItem -- + * + * This function is invoked to "draw" a window item in a given drawable. + * Since the window draws itself, we needn't do any actual redisplay + * here. However, this function takes care of actually repositioning the + * child window so that it occupies the correct screen position. + * + * Results: + * None. + * + * Side effects: + * The child window's position may get changed. Note: this function gets + * called both when a window needs to be displayed and when it ceases to + * be visible on the screen (e.g. it was scrolled or moved off-screen or + * the enclosing canvas is unmapped). + * + *-------------------------------------------------------------- + */ + +static void +DisplayWinItem( + 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 regionX, int regionY, int regionWidth, int regionHeight) + /* Describes region of canvas that must be + * redisplayed (not used). */ +{ + WindowItem *winItemPtr = (WindowItem *) itemPtr; + int width, height; + short x, y; + Tk_Window canvasTkwin = Tk_CanvasTkwin(canvas); + Tk_State state = itemPtr->state; + + if (winItemPtr->tkwin == NULL) { + return; + } + if (state == TK_STATE_NULL) { + state = Canvas(canvas)->canvas_state; + } + + /* + * A drawable of None is used by the canvas UnmapNotify handler + * to indicate that we should no longer display ourselves. + */ + if (state == TK_STATE_HIDDEN || drawable == None) { + if (canvasTkwin == Tk_Parent(winItemPtr->tkwin)) { + Tk_UnmapWindow(winItemPtr->tkwin); + } else { + Tk_UnmaintainGeometry(winItemPtr->tkwin, canvasTkwin); + } + return; + } + Tk_CanvasWindowCoords(canvas, (double) winItemPtr->header.x1, + (double) winItemPtr->header.y1, &x, &y); + width = winItemPtr->header.x2 - winItemPtr->header.x1; + height = winItemPtr->header.y2 - winItemPtr->header.y1; + + /* + * If the window is completely out of the visible area of the canvas then + * unmap it. This code used not to be present (why unmap the window if it + * isn't visible anyway?) but this could cause the window to suddenly + * reappear if the canvas window got resized. + */ + + if (((x + width) <= 0) || ((y + height) <= 0) + || (x >= Tk_Width(canvasTkwin)) || (y >= Tk_Height(canvasTkwin))) { + if (canvasTkwin == Tk_Parent(winItemPtr->tkwin)) { + Tk_UnmapWindow(winItemPtr->tkwin); + } else { + Tk_UnmaintainGeometry(winItemPtr->tkwin, canvasTkwin); + } + return; + } + + /* + * Reposition and map the window (but in different ways depending on + * whether the canvas is the window's parent). + */ + + if (canvasTkwin == Tk_Parent(winItemPtr->tkwin)) { + if ((x != Tk_X(winItemPtr->tkwin)) || (y != Tk_Y(winItemPtr->tkwin)) + || (width != Tk_Width(winItemPtr->tkwin)) + || (height != Tk_Height(winItemPtr->tkwin))) { + Tk_MoveResizeWindow(winItemPtr->tkwin, x, y, width, height); + } + Tk_MapWindow(winItemPtr->tkwin); + } else { + Tk_MaintainGeometry(winItemPtr->tkwin, canvasTkwin, x, y, + width, height); + } +} + +/* + *-------------------------------------------------------------- + * + * WinItemToPoint -- + * + * Computes the distance from a given point to a given window, in canvas + * units. + * + * Results: + * The return value is 0 if the point whose x and y coordinates are + * coordPtr[0] and coordPtr[1] is inside the window. If the point isn't + * inside the window then the return value is the distance from the point + * to the window. + * + * Side effects: + * None. + * + *-------------------------------------------------------------- + */ + +static double +WinItemToPoint( + Tk_Canvas canvas, /* Canvas containing item. */ + Tk_Item *itemPtr, /* Item to check against point. */ + double *pointPtr) /* Pointer to x and y coordinates. */ +{ + WindowItem *winItemPtr = (WindowItem *) itemPtr; + double x1, x2, y1, y2, xDiff, yDiff; + + x1 = winItemPtr->header.x1; + y1 = winItemPtr->header.y1; + x2 = winItemPtr->header.x2; + y2 = winItemPtr->header.y2; + + /* + * Point is outside window. + */ + + if (pointPtr[0] < x1) { + xDiff = x1 - pointPtr[0]; + } else if (pointPtr[0] >= x2) { + xDiff = pointPtr[0] + 1 - x2; + } else { + xDiff = 0; + } + + if (pointPtr[1] < y1) { + yDiff = y1 - pointPtr[1]; + } else if (pointPtr[1] >= y2) { + yDiff = pointPtr[1] + 1 - y2; + } else { + yDiff = 0; + } + + return hypot(xDiff, yDiff); +} + +/* + *-------------------------------------------------------------- + * + * WinItemToArea -- + * + * This function is called to determine whether an item lies entirely + * inside, entirely outside, or overlapping a given rectangle. + * + * Results: + * -1 is returned if the item is entirely outside the area given by + * rectPtr, 0 if it overlaps, and 1 if it is entirely inside the given + * area. + * + * Side effects: + * None. + * + *-------------------------------------------------------------- + */ + +static int +WinItemToArea( + Tk_Canvas canvas, /* Canvas containing item. */ + Tk_Item *itemPtr, /* Item to check against rectangle. */ + double *rectPtr) /* Pointer to array of four coordinates + * (x1,y1,x2,y2) describing rectangular + * area. */ +{ + WindowItem *winItemPtr = (WindowItem *) itemPtr; + + if ((rectPtr[2] <= winItemPtr->header.x1) + || (rectPtr[0] >= winItemPtr->header.x2) + || (rectPtr[3] <= winItemPtr->header.y1) + || (rectPtr[1] >= winItemPtr->header.y2)) { + return -1; + } + if ((rectPtr[0] <= winItemPtr->header.x1) + && (rectPtr[1] <= winItemPtr->header.y1) + && (rectPtr[2] >= winItemPtr->header.x2) + && (rectPtr[3] >= winItemPtr->header.y2)) { + return 1; + } + return 0; +} + +/* + *-------------------------------------------------------------- + * + * xerrorhandler -- + * + * This is a dummy function to catch X11 errors during an attempt to + * print a canvas window. + * + * Results: + * None. + * + * Side effects: + * None. + * + *-------------------------------------------------------------- + */ + +#ifdef X_GetImage +static int +xerrorhandler( + ClientData clientData, + XErrorEvent *e) +{ + return 0; +} +#endif /* X_GetImage */ + +/* + *-------------------------------------------------------------- + * + * WinItemToPostscript -- + * + * This function is called to generate Postscript for window items. + * + * Results: + * The return value is a standard Tcl result. If an error occurs in + * generating Postscript then an error message is left in interp->result, + * replacing whatever used to be there. If no error occurs, then + * Postscript for the item is appended to the result. + * + * Side effects: + * None. + * + *-------------------------------------------------------------- + */ + +static int +WinItemToPostscript( + 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. */ +{ + WindowItem *winItemPtr = (WindowItem *) itemPtr; + double x, y; + int width, height; + Tk_Window tkwin = winItemPtr->tkwin; + + if (prepass || winItemPtr->tkwin == NULL) { + return TCL_OK; + } + + width = Tk_Width(tkwin); + height = Tk_Height(tkwin); + + /* + * Compute the coordinates of the lower-left corner of the window, taking + * into account the anchor position for the window. + */ + + x = winItemPtr->x; + y = Tk_CanvasPsY(canvas, winItemPtr->y); + + switch (winItemPtr->anchor) { + case TK_ANCHOR_NW: y -= height; break; + case TK_ANCHOR_N: x -= width/2.0; y -= height; break; + case TK_ANCHOR_NE: x -= width; y -= height; break; + case TK_ANCHOR_E: x -= width; y -= height/2.0; break; + case TK_ANCHOR_SE: x -= width; break; + case TK_ANCHOR_S: x -= width/2.0; break; + case TK_ANCHOR_SW: break; + case TK_ANCHOR_W: y -= height/2.0; break; + case TK_ANCHOR_CENTER: x -= width/2.0; y -= height/2.0; break; + } + + return CanvasPsWindow(interp, tkwin, canvas, x, y, width, height); +} + +static int +CanvasPsWindow( + Tcl_Interp *interp, /* Leave Postscript or error message here. */ + Tk_Window tkwin, /* window to be printed */ + Tk_Canvas canvas, /* Information about overall canvas. */ + double x, double y, /* origin of window. */ + int width, int height) /* width/height of window. */ +{ + XImage *ximage; + int result; +#ifdef X_GetImage + Tk_ErrorHandler handle; +#endif + Tcl_Obj *cmdObj, *psObj; + Tcl_InterpState interpState = Tcl_SaveInterpState(interp, TCL_OK); + + /* + * Locate the subwindow within the wider window. + */ + + psObj = Tcl_ObjPrintf( + "\n%%%% %s item (%s, %d x %d)\n" /* Comment */ + "%.15g %.15g translate\n", /* Position */ + Tk_Class(tkwin), Tk_PathName(tkwin), width, height, x, y); + + /* + * First try if the widget has its own "postscript" command. If it exists, + * this will produce much better postscript than when a pixmap is used. + */ + + Tcl_ResetResult(interp); + cmdObj = Tcl_ObjPrintf("%s postscript -prolog 0", Tk_PathName(tkwin)); + Tcl_IncrRefCount(cmdObj); + result = Tcl_EvalObjEx(interp, cmdObj, 0); + Tcl_DecrRefCount(cmdObj); + + if (result == TCL_OK) { + Tcl_AppendPrintfToObj(psObj, + "50 dict begin\nsave\ngsave\n" + "0 %d moveto %d 0 rlineto 0 -%d rlineto -%d 0 rlineto closepath\n" + "1.000 1.000 1.000 setrgbcolor AdjustColor\nfill\ngrestore\n", + height, width, height, width); + Tcl_AppendObjToObj(psObj, Tcl_GetObjResult(interp)); + Tcl_AppendToObj(psObj, "\nrestore\nend\n\n\n", -1); + goto done; + } + + /* + * If the window is off the screen it will generate a BadMatch/XError. We + * catch any BadMatch errors here + */ + +#ifdef X_GetImage + handle = Tk_CreateErrorHandler(Tk_Display(tkwin), BadMatch, + X_GetImage, -1, xerrorhandler, tkwin); +#endif + + /* + * Generate an XImage from the window. We can then read pixel values out + * of the XImage. + */ + + ximage = XGetImage(Tk_Display(tkwin), Tk_WindowId(tkwin), 0, 0, + (unsigned) width, (unsigned) height, AllPlanes, ZPixmap); + +#ifdef X_GetImage + Tk_DeleteErrorHandler(handle); +#endif + + if (ximage == NULL) { + result = TCL_OK; + } else { + Tcl_ResetResult(interp); + result = TkPostscriptImage(interp, tkwin, Canvas(canvas)->psInfo, + ximage, 0, 0, width, height); + Tcl_AppendObjToObj(psObj, Tcl_GetObjResult(interp)); + XDestroyImage(ximage); + } + + /* + * Plug the accumulated postscript back into the result. + */ + + done: + if (result == TCL_OK) { + (void) Tcl_RestoreInterpState(interp, interpState); + Tcl_AppendObjToObj(Tcl_GetObjResult(interp), psObj); + } else { + Tcl_DiscardInterpState(interpState); + } + Tcl_DecrRefCount(psObj); + return result; +} + +/* + *-------------------------------------------------------------- + * + * ScaleWinItem -- + * + * This function is invoked to rescale a window item. + * + * Results: + * None. + * + * Side effects: + * The window 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) + * + *-------------------------------------------------------------- + */ + +static void +ScaleWinItem( + Tk_Canvas canvas, /* Canvas containing window. */ + Tk_Item *itemPtr, /* Window to be scaled. */ + double originX, double originY, + /* Origin about which to scale window. */ + double scaleX, /* Amount to scale in X direction. */ + double scaleY) /* Amount to scale in Y direction. */ +{ + WindowItem *winItemPtr = (WindowItem *) itemPtr; + + winItemPtr->x = originX + scaleX*(winItemPtr->x - originX); + winItemPtr->y = originY + scaleY*(winItemPtr->y - originY); + if (winItemPtr->width > 0) { + winItemPtr->width = (int) (scaleX*winItemPtr->width); + } + if (winItemPtr->height > 0) { + winItemPtr->height = (int) (scaleY*winItemPtr->height); + } + ComputeWindowBbox(canvas, winItemPtr); +} + +/* + *-------------------------------------------------------------- + * + * TranslateWinItem -- + * + * This function is called to move a window by a given amount. + * + * Results: + * None. + * + * Side effects: + * The position of the window is offset by (xDelta, yDelta), and the + * bounding box is updated in the generic part of the item structure. + * + *-------------------------------------------------------------- + */ + +static void +TranslateWinItem( + 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. */ +{ + WindowItem *winItemPtr = (WindowItem *) itemPtr; + + winItemPtr->x += deltaX; + winItemPtr->y += deltaY; + ComputeWindowBbox(canvas, winItemPtr); +} + +/* + *-------------------------------------------------------------- + * + * WinItemStructureProc -- + * + * This function is invoked whenever StructureNotify events occur for a + * window that's managed as part of a canvas window item. This function's + * only purpose is to clean up when windows are deleted. + * + * Results: + * None. + * + * Side effects: + * The window is disassociated from the window item when it is deleted. + * + *-------------------------------------------------------------- + */ + +static void +WinItemStructureProc( + ClientData clientData, /* Pointer to record describing window item. */ + XEvent *eventPtr) /* Describes what just happened. */ +{ + WindowItem *winItemPtr = clientData; + + if (eventPtr->type == DestroyNotify) { + winItemPtr->tkwin = NULL; + } +} + +/* + *-------------------------------------------------------------- + * + * WinItemRequestProc -- + * + * This function is invoked whenever a window that's associated with a + * window canvas item changes its requested dimensions. + * + * Results: + * None. + * + * Side effects: + * The size and location on the screen of the window may change, + * depending on the options specified for the window item. + * + *-------------------------------------------------------------- + */ + +static void +WinItemRequestProc( + ClientData clientData, /* Pointer to record for window item. */ + Tk_Window tkwin) /* Window that changed its desired size. */ +{ + WindowItem *winItemPtr = clientData; + + ComputeWindowBbox(winItemPtr->canvas, winItemPtr); + + /* + * A drawable argument of None to DisplayWinItem is used by the canvas + * UnmapNotify handler to indicate that we should no longer display + * ourselves, so need to pass a (bogus) non-zero drawable value here. + */ + DisplayWinItem(winItemPtr->canvas, (Tk_Item *) winItemPtr, NULL, + (Drawable) -1, 0, 0, 0, 0); +} + +/* + *-------------------------------------------------------------- + * + * WinItemLostSlaveProc -- + * + * This function is invoked by Tk whenever some other geometry claims + * control over a slave that used to be managed by us. + * + * Results: + * None. + * + * Side effects: + * Forgets all canvas-related information about the slave. + * + *-------------------------------------------------------------- + */ + + /* ARGSUSED */ +static void +WinItemLostSlaveProc( + ClientData clientData, /* WindowItem structure for slave window that + * was stolen away. */ + Tk_Window tkwin) /* Tk's handle for the slave window. */ +{ + WindowItem *winItemPtr = clientData; + Tk_Window canvasTkwin = Tk_CanvasTkwin(winItemPtr->canvas); + + Tk_DeleteEventHandler(winItemPtr->tkwin, StructureNotifyMask, + WinItemStructureProc, winItemPtr); + if (canvasTkwin != Tk_Parent(winItemPtr->tkwin)) { + Tk_UnmaintainGeometry(winItemPtr->tkwin, canvasTkwin); + } + Tk_UnmapWindow(winItemPtr->tkwin); + winItemPtr->tkwin = NULL; +} + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |