Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tree: 9e886ff077
Fetching contributors…

Cannot retrieve contributors at this time

1096 lines (988 sloc) 31.57 kb
/*
* 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:
*/
Jump to Line
Something went wrong with that request. Please try again.