1096 lines
31 KiB
C
1096 lines
31 KiB
C
/*
|
||
* tkCanvWind.c --
|
||
*
|
||
* This file implements window items for canvas widgets.
|
||
*
|
||
* Copyright (c) 1992-1994 The Regents of the University of California.
|
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
|
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*
|
||
* See the file "license.terms" for information on usage and redistribution of
|
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* 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. */
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||
} WindowItem;
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||
|
||
/*
|
||
* Information used for parsing configuration specs:
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||
*/
|
||
|
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static const Tk_CustomOption stateOption = {
|
||
TkStateParseProc, TkStatePrintProc, INT2PTR(2)
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||
};
|
||
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,
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||
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:
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||
*/
|
||
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static void ComputeWindowBbox(Tk_Canvas canvas,
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WindowItem *winItemPtr);
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static int ConfigureWinItem(Tcl_Interp *interp,
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Tk_Canvas canvas, Tk_Item *itemPtr, int objc,
|
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Tcl_Obj *const objv[], int flags);
|
||
static int CreateWinItem(Tcl_Interp *interp,
|
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Tk_Canvas canvas, struct Tk_Item *itemPtr,
|
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int objc, Tcl_Obj *const objv[]);
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static void DeleteWinItem(Tk_Canvas canvas,
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Tk_Item *itemPtr, Display *display);
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static void DisplayWinItem(Tk_Canvas canvas,
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Tk_Item *itemPtr, Display *display, Drawable dst,
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int x, int y, int width, int height);
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static void ScaleWinItem(Tk_Canvas canvas,
|
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Tk_Item *itemPtr, double originX, double originY,
|
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double scaleX, double scaleY);
|
||
static void TranslateWinItem(Tk_Canvas canvas,
|
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Tk_Item *itemPtr, double deltaX, double deltaY);
|
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static int WinItemCoords(Tcl_Interp *interp,
|
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Tk_Canvas canvas, Tk_Item *itemPtr, int objc,
|
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Tcl_Obj *const objv[]);
|
||
static void WinItemLostContentProc(ClientData clientData,
|
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Tk_Window tkwin);
|
||
static void WinItemRequestProc(ClientData clientData,
|
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Tk_Window tkwin);
|
||
static void WinItemStructureProc(ClientData clientData,
|
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XEvent *eventPtr);
|
||
static int WinItemToArea(Tk_Canvas canvas,
|
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Tk_Item *itemPtr, double *rectPtr);
|
||
static int WinItemToPostscript(Tcl_Interp *interp,
|
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Tk_Canvas canvas, Tk_Item *itemPtr, int prepass);
|
||
static double WinItemToPoint(Tk_Canvas canvas,
|
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Tk_Item *itemPtr, double *pointPtr);
|
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#ifdef X_GetImage
|
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static int xerrorhandler(ClientData clientData, XErrorEvent *e);
|
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#endif
|
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static int CanvasPsWindow(Tcl_Interp *interp,
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Tk_Window tkwin, Tk_Canvas canvas, double x,
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double y, int width, int height);
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|
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/*
|
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* The structure below defines the window item type by means of functions
|
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* that can be invoked by generic item code.
|
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*/
|
||
|
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Tk_ItemType tkWindowType = {
|
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"window", /* name */
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sizeof(WindowItem), /* itemSize */
|
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CreateWinItem, /* createProc */
|
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configSpecs, /* configSpecs */
|
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ConfigureWinItem, /* configureProc */
|
||
WinItemCoords, /* coordProc */
|
||
DeleteWinItem, /* deleteProc */
|
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DisplayWinItem, /* displayProc */
|
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1|TK_CONFIG_OBJS, /* flags */
|
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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
|
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* geometry manager):
|
||
*/
|
||
|
||
static const Tk_GeomMgr canvasGeomType = {
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"canvas", /* name */
|
||
WinItemRequestProc, /* requestProc */
|
||
WinItemLostContentProc, /* lostSlaveProc */
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||
};
|
||
|
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/*
|
||
*--------------------------------------------------------------
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||
*
|
||
* CreateWinItem --
|
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*
|
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* 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
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* item, then an error message is left in the interp's result; in this
|
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* case itemPtr is left uninitialized, so it can be safely freed by the
|
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* caller.
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*
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* Side effects:
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||
* A new window item is created.
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*
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*--------------------------------------------------------------
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*/
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static int
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CreateWinItem(
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Tcl_Interp *interp, /* Interpreter for error reporting. */
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Tk_Canvas canvas, /* Canvas to hold new item. */
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||
Tk_Item *itemPtr, /* Record to hold new item; header has been
|
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* initialized by caller. */
|
||
int objc, /* Number of arguments in objv. */
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Tcl_Obj *const objv[]) /* Arguments describing window. */
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{
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||
WindowItem *winItemPtr = (WindowItem *) itemPtr;
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int i;
|
||
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if (objc == 0) {
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Tcl_Panic("canvas did not pass any coords");
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||
}
|
||
|
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/*
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* Initialize item's record.
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||
*/
|
||
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winItemPtr->tkwin = NULL;
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||
winItemPtr->width = 0;
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winItemPtr->height = 0;
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winItemPtr->anchor = TK_ANCHOR_CENTER;
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winItemPtr->canvas = canvas;
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/*
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* Process the arguments to fill in the item record. Only 1 (list) or 2 (x
|
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* y) coords are allowed.
|
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*/
|
||
|
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if (objc == 1) {
|
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i = 1;
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} else {
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const char *arg = Tcl_GetString(objv[1]);
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||
|
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i = 2;
|
||
if ((arg[0] == '-') && (arg[1] >= 'a') && (arg[1] <= 'z')) {
|
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i = 1;
|
||
}
|
||
}
|
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if (WinItemCoords(interp, canvas, itemPtr, i, objv) != TCL_OK) {
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goto error;
|
||
}
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if (ConfigureWinItem(interp, canvas, itemPtr, objc-i, objv+i, 0)
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||
== TCL_OK) {
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||
return TCL_OK;
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||
}
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||
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error:
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DeleteWinItem(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas)));
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return TCL_ERROR;
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}
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/*
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||
*--------------------------------------------------------------
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*
|
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* WinItemCoords --
|
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*
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* This function is invoked to process the "coords" widget command on
|
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* window items. See the user documentation for details on what it does.
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*
|
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* Results:
|
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* Returns TCL_OK or TCL_ERROR, and sets the interp's result.
|
||
*
|
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* Side effects:
|
||
* The coordinates for the given item may be changed.
|
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*
|
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*--------------------------------------------------------------
|
||
*/
|
||
|
||
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. */
|
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Tcl_Obj *const objv[]) /* Array of coordinates: x1, y1, x2, y2, ... */
|
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{
|
||
WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
|
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if (objc == 0) {
|
||
Tcl_Obj *objs[2];
|
||
|
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objs[0] = Tcl_NewDoubleObj(winItemPtr->x);
|
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objs[1] = Tcl_NewDoubleObj(winItemPtr->y);
|
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Tcl_SetObjResult(interp, Tcl_NewListObj(2, objs));
|
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} else if (objc < 3) {
|
||
if (objc==1) {
|
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if (Tcl_ListObjGetElements(interp, objv[0], &objc,
|
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(Tcl_Obj ***) &objv) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
} else if (objc != 2) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
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"wrong # coordinates: expected 2, got %d", objc));
|
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Tcl_SetErrorCode(interp, "TK", "CANVAS", "COORDS", "WINDOW",
|
||
NULL);
|
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return TCL_ERROR;
|
||
}
|
||
}
|
||
if ((Tk_CanvasGetCoordFromObj(interp, canvas, objv[0], &winItemPtr->x)
|
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!= TCL_OK) || (Tk_CanvasGetCoordFromObj(interp, canvas, objv[1],
|
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&winItemPtr->y) != TCL_OK)) {
|
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return TCL_ERROR;
|
||
}
|
||
ComputeWindowBbox(canvas, winItemPtr);
|
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} else {
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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);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* WinItemLostContentProc --
|
||
*
|
||
* This function is invoked by Tk whenever some other geometry claims
|
||
* control over a content window that used to be managed by us.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Forgets all canvas-related information about the content window.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
WinItemLostContentProc(
|
||
ClientData clientData, /* WindowItem structure for content window that
|
||
* was stolen away. */
|
||
Tk_Window tkwin) /* Tk's handle for the content 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:
|
||
*/
|