/*
* 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.
*
* RCS: @(#) $Id: tkCanvWind.c,v 1.9 2003/02/09 07:48:22 hobbs Exp $
*/
#include "tkPort.h"
#include "tkInt.h"
#include "tkCanvases.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 Tk_CustomOption stateOption = {
TkStateParseProc,
TkStatePrintProc, (ClientData) 2
};
static Tk_CustomOption tagsOption = {
Tk_CanvasTagsParseProc,
Tk_CanvasTagsPrintProc, (ClientData) NULL
};
static Tk_ConfigSpec configSpecs[] = {
{TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL,
"center", Tk_Offset(WindowItem, anchor), TK_CONFIG_DONT_SET_DEFAULT},
{TK_CONFIG_PIXELS, "-height", (char *) NULL, (char *) NULL,
"0", Tk_Offset(WindowItem, height), TK_CONFIG_DONT_SET_DEFAULT},
{TK_CONFIG_CUSTOM, "-state", (char *) NULL, (char *) NULL,
(char *) NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK,
&stateOption},
{TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL,
(char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption},
{TK_CONFIG_CALLBACK, "-updatecommand", (char *) NULL, (char *) NULL,
(char *) NULL, Tk_Offset(Tk_Item, updateCmd), TK_CONFIG_NULL_OK},
{TK_CONFIG_PIXELS, "-width", (char *) NULL, (char *) NULL,
"0", Tk_Offset(WindowItem, width), TK_CONFIG_DONT_SET_DEFAULT},
{TK_CONFIG_WINDOW, "-window", (char *) NULL, (char *) NULL,
(char *) NULL, Tk_Offset(WindowItem, tkwin), TK_CONFIG_NULL_OK},
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
(char *) NULL, 0, 0}
};
/*
* Prototypes for procedures defined in this file:
*/
static void ComputeWindowBbox _ANSI_ARGS_((Tk_Canvas canvas,
WindowItem *winItemPtr));
static int ConfigureWinItem _ANSI_ARGS_((Tcl_Interp *interp,
Tk_Canvas canvas, Tk_Item *itemPtr, int objc,
Tcl_Obj *CONST objv[], int flags));
static int CreateWinItem _ANSI_ARGS_((Tcl_Interp *interp,
Tk_Canvas canvas, struct Tk_Item *itemPtr,
int objc, Tcl_Obj *CONST objv[]));
static void DeleteWinItem _ANSI_ARGS_((Tk_Canvas canvas,
Tk_Item *itemPtr, Display *display));
static void DisplayWinItem _ANSI_ARGS_((Tk_Canvas canvas,
Tk_Item *itemPtr, Display *display, Drawable dst,
int x, int y, int width, int height));
static void ScaleWinItem _ANSI_ARGS_((Tk_Canvas canvas,
Tk_Item *itemPtr, double originX, double originY,
double scaleX, double scaleY));
static void TranslateWinItem _ANSI_ARGS_((Tk_Canvas canvas,
Tk_Item *itemPtr, double deltaX, double deltaY));
static int WinItemCoords _ANSI_ARGS_((Tcl_Interp *interp,
Tk_Canvas canvas, Tk_Item *itemPtr, int objc,
Tcl_Obj *CONST objv[]));
static void WinItemLostSlaveProc _ANSI_ARGS_((
ClientData clientData, Tk_Window tkwin));
static void WinItemRequestProc _ANSI_ARGS_((ClientData clientData,
Tk_Window tkwin));
static void WinItemStructureProc _ANSI_ARGS_((
ClientData clientData, XEvent *eventPtr));
static int WinItemToArea _ANSI_ARGS_((Tk_Canvas canvas,
Tk_Item *itemPtr, double *rectPtr));
static int WinItemToPostscript _ANSI_ARGS_((Tcl_Interp *interp,
Tk_Canvas canvas, Tk_Item *itemPtr, int prepass));
static double WinItemToPoint _ANSI_ARGS_((Tk_Canvas canvas,
Tk_Item *itemPtr, double *pointPtr));
#ifdef X_GetImage
static int xerrorhandler _ANSI_ARGS_((ClientData clientData,
XErrorEvent *e));
#endif
static int CanvasPsWindow _ANSI_ARGS_((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 procedures
* 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 */
(Tk_ItemIndexProc *) NULL, /* indexProc */
(Tk_ItemCursorProc *) NULL, /* cursorProc */
(Tk_ItemSelectionProc *) NULL, /* selectionProc */
(Tk_ItemInsertProc *) NULL, /* insertProc */
(Tk_ItemDCharsProc *) NULL, /* dTextProc */
(Tk_ItemType *) NULL, /* nextPtr */
};
/*
* The structure below defines the official type record for the
* placer:
*/
static Tk_GeomMgr canvasGeomType = {
"canvas", /* name */
WinItemRequestProc, /* requestProc */
WinItemLostSlaveProc, /* lostSlaveProc */
};
/*
*--------------------------------------------------------------
*
* CreateWinItem --
*
* This procedure 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(interp, canvas, itemPtr, objc, objv)
Tcl_Interp *interp; /* Interpreter for error reporting. */
Tk_Canvas canvas; /* Canvas to hold new item. */
Tk_Item *itemPtr; /* Record to hold new item; header
* has been initialized by caller. */
int objc; /* Number of arguments in objv. */
Tcl_Obj *CONST objv[]; /* Arguments describing window. */
{
WindowItem *winItemPtr = (WindowItem *) itemPtr;
int i;
if (objc == 0) {
panic("canvas did not pass any coords\n");
}
/*
* 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 {
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 procedure 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(interp, canvas, itemPtr, objc, objv)
Tcl_Interp *interp; /* Used for error reporting. */
Tk_Canvas canvas; /* Canvas containing item. */
Tk_Item *itemPtr; /* Item whose coordinates are to be
* read or modified. */
int objc; /* Number of coordinates supplied in
* objv. */
Tcl_Obj *CONST objv[]; /* Array of coordinates: x1, y1,
* x2, y2, ... */
{
WindowItem *winItemPtr = (WindowItem *) itemPtr;
if (objc == 0) {
Tcl_Obj *obj = Tcl_NewObj();
Tcl_Obj *subobj = Tcl_NewDoubleObj(winItemPtr->x);
Tcl_ListObjAppendElement(interp, obj, subobj);
subobj = Tcl_NewDoubleObj(winItemPtr->y);
Tcl_ListObjAppendElement(interp, obj, subobj);
Tcl_SetObjResult(interp, obj);
} 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) {
char buf[64 + TCL_INTEGER_SPACE];
sprintf(buf, "wrong # coordinates: expected 2, got %d", objc);
Tcl_SetResult(interp, buf, TCL_VOLATILE);
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 {
char buf[64 + TCL_INTEGER_SPACE];
sprintf(buf, "wrong # coordinates: expected 0 or 2, got %d", objc);
Tcl_SetResult(interp, buf, TCL_VOLATILE);
return TCL_ERROR;
}
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* ConfigureWinItem --
*
* This procedure 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(interp, canvas, itemPtr, objc, objv, flags)
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,
(CONST84 Tcl_Obj *CONST *) 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, (ClientData) winItemPtr);
Tk_ManageGeometry(oldWindow, (Tk_GeomMgr *) NULL,
(ClientData) 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) {
badWindow:
Tcl_AppendResult(interp, "can't use ",
Tk_PathName(winItemPtr->tkwin),
" in a window item of this canvas", (char *) NULL);
winItemPtr->tkwin = NULL;
return TCL_ERROR;
}
}
if (((Tk_FakeWin *) (winItemPtr->tkwin))->flags & TK_TOP_HIERARCHY) {
goto badWindow;
}
if (winItemPtr->tkwin == canvasTkwin) {
goto badWindow;
}
Tk_CreateEventHandler(winItemPtr->tkwin, StructureNotifyMask,
WinItemStructureProc, (ClientData) winItemPtr);
Tk_ManageGeometry(winItemPtr->tkwin, &canvasGeomType,
(ClientData) 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;
}
/*
*--------------------------------------------------------------
*
* DeleteWinItem --
*
* This procedure 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(canvas, itemPtr, display)
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, (ClientData) winItemPtr);
Tk_ManageGeometry(winItemPtr->tkwin, (Tk_GeomMgr *) NULL,
(ClientData) NULL);
if (canvasTkwin != Tk_Parent(winItemPtr->tkwin)) {
Tk_UnmaintainGeometry(winItemPtr->tkwin, canvasTkwin);
}
Tk_UnmapWindow(winItemPtr->tkwin);
}
}
/*
*--------------------------------------------------------------
*
* ComputeWindowBbox --
*
* This procedure is invoked to compute the bounding box of
* all the pixels that may be drawn as part of a window item.
* This procedure 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(canvas, winItemPtr)
Tk_Canvas canvas; /* Canvas that contains item. */
WindowItem *winItemPtr; /* Item whose bbox is to be
* recomputed. */
{
int width, height, x, y;
Tk_State state = Tk_GetItemState(canvas, &winItemPtr->header);
x = (int) (winItemPtr->x + ((winItemPtr->x >= 0) ? 0.5 : - 0.5));
y = (int) (winItemPtr->y + ((winItemPtr->y >= 0) ? 0.5 : - 0.5));
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 procedure 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 procedure 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
* procedure 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(canvas, itemPtr, display, drawable, regionX, regionY,
regionWidth, regionHeight)
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, regionY, regionWidth, 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 = Tk_GetItemState(canvas, itemPtr);
if (winItemPtr->tkwin == NULL) {
return;
}
if (state == TK_STATE_HIDDEN) {
Tk_UnmapWindow(winItemPtr->tkwin);
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(canvas, itemPtr, pointPtr)
Tk_Canvas canvas; /* Canvas containing item. */
Tk_Item *itemPtr; /* Item to check against point. */
double *pointPtr; /* Pointer to x and y coordinates. */
{
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 procedure 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(canvas, itemPtr, rectPtr)
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, e)
ClientData clientData;
XErrorEvent *e;
{
return 0;
}
#endif
/*
*--------------------------------------------------------------
*
* WinItemToPostscript --
*
* This procedure 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(interp, canvas, itemPtr, prepass)
Tcl_Interp *interp; /* Leave Postscript or error message
* here. */
Tk_Canvas canvas; /* Information about overall canvas. */
Tk_Item *itemPtr; /* Item for which Postscript is
* wanted. */
int prepass; /* 1 means this is a prepass to
* collect font information; 0 means
* final Postscript is being created.*/
{
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(interp, tkwin, canvas, x, y, width, height)
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, y; /* origin of window. */
int width, height; /* width/height of window. */
{
char buffer[256];
XImage *ximage;
int result;
Tcl_Obj *savePtr, *buffer1;
#ifdef X_GetImage
Tk_ErrorHandler handle;
#endif
Tcl_Obj *obj = NULL;
sprintf(buffer, "\n%%%% %s item (%s, %d x %d)\n%.15g %.15g translate\n",
Tk_Class(tkwin), Tk_PathName(tkwin), width, height, x, y);
Tcl_AppendResult(interp, buffer, (char *) NULL);
/* 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.
*/
savePtr = Tcl_GetObjResult(interp);
Tcl_IncrRefCount(savePtr);
Tcl_ResetResult(interp);
#ifndef _LANG
sprintf (buffer, "%s postscript -prolog 0\n", Tk_PathName(tkwin));
result = Tcl_Eval(interp, buffer);
#else
obj = LangWidgetObj(interp,tkwin);
result = LangMethodCall(interp,obj,"postscript",1,2,"%s %d","-prolog",0);
Tcl_DecrRefCount(obj);
#endif /* _LANG */
buffer1 = Tcl_GetObjResult(interp);
Tcl_IncrRefCount(buffer1);
Tcl_SetObjResult(interp,savePtr);
Tcl_DecrRefCount(savePtr);
if (result == TCL_OK) {
Tcl_AppendResult(interp,
"50 dict begin\nsave\ngsave\n",
(char *) NULL);
sprintf (buffer,
"0 %d moveto %d 0 rlineto 0 -%d rlineto -%d",
height, width, height, width);
Tcl_AppendResult(interp, buffer, (char *) NULL);
Tcl_AppendResult(interp, " 0 rlineto closepath\n",
"1.000 1.000 1.000 setrgbcolor AdjustColor\nfill\ngrestore\n",
Tcl_GetString(buffer1), "\nrestore\nend\n\n\n",
(char *) NULL);
Tcl_DStringFree(&buffer1);
return result;
}
Tcl_DecrRefCount(buffer1);
/*
* If the window is off the screen it will generate an BadMatch/XError
* We catch any BadMatch errors here
*/
#ifdef X_GetImage
handle = Tk_CreateErrorHandler(Tk_Display(tkwin), BadMatch,
X_GetImage, -1, xerrorhandler, (ClientData) 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 int)width, (unsigned int)height, AllPlanes, ZPixmap);
#ifdef X_GetImage
Tk_DeleteErrorHandler(handle);
#endif
if (ximage == (XImage*) NULL) {
return TCL_OK;
}
result = TkPostscriptImage(interp, tkwin,
((TkCanvas *)canvas)->psInfo, ximage, 0, 0, width, height);
XDestroyImage(ximage);
return result;
}
/*
*--------------------------------------------------------------
*
* ScaleWinItem --
*
* This procedure 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(canvas, itemPtr, originX, originY, scaleX, scaleY)
Tk_Canvas canvas; /* Canvas containing window. */
Tk_Item *itemPtr; /* Window to be scaled. */
double originX, 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 procedure 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(canvas, itemPtr, deltaX, deltaY)
Tk_Canvas canvas; /* Canvas containing item. */
Tk_Item *itemPtr; /* Item that is being moved. */
double deltaX, deltaY; /* Amount by which item is to be
* moved. */
{
WindowItem *winItemPtr = (WindowItem *) itemPtr;
winItemPtr->x += deltaX;
winItemPtr->y += deltaY;
ComputeWindowBbox(canvas, winItemPtr);
}
/*
*--------------------------------------------------------------
*
* WinItemStructureProc --
*
* This procedure is invoked whenever StructureNotify events
* occur for a window that's managed as part of a canvas window
* item. This procudure'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, eventPtr)
ClientData clientData; /* Pointer to record describing window item. */
XEvent *eventPtr; /* Describes what just happened. */
{
WindowItem *winItemPtr = (WindowItem *) clientData;
if (eventPtr->type == DestroyNotify) {
winItemPtr->tkwin = NULL;
}
}
/*
*--------------------------------------------------------------
*
* WinItemRequestProc --
*
* This procedure 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, tkwin)
ClientData clientData; /* Pointer to record for window item. */
Tk_Window tkwin; /* Window that changed its desired
* size. */
{
WindowItem *winItemPtr = (WindowItem *) clientData;
ComputeWindowBbox(winItemPtr->canvas, winItemPtr);
DisplayWinItem(winItemPtr->canvas, (Tk_Item *) winItemPtr,
(Display *) NULL, (Drawable) None, 0, 0, 0, 0);
}
/*
*--------------------------------------------------------------
*
* WinItemLostSlaveProc --
*
* This procedure 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, tkwin)
ClientData clientData; /* WindowItem structure for slave window that
* was stolen away. */
Tk_Window tkwin; /* Tk's handle for the slave window. */
{
WindowItem *winItemPtr = (WindowItem *) clientData;
Tk_Window canvasTkwin = Tk_CanvasTkwin(winItemPtr->canvas);
Tk_DeleteEventHandler(winItemPtr->tkwin, StructureNotifyMask,
WinItemStructureProc, (ClientData) winItemPtr);
if (canvasTkwin != Tk_Parent(winItemPtr->tkwin)) {
Tk_UnmaintainGeometry(winItemPtr->tkwin, canvasTkwin);
}
Tk_UnmapWindow(winItemPtr->tkwin);
winItemPtr->tkwin = NULL;
}