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pTk/mTk/unix/tkUnixEmbed.c  view on Meta::CPAN

    }

    /*
     * Tk sets the window colormap to the screen default colormap in
     * tkWindow.c:AllocWindow. This doesn't work well for embedded
     * windows. So we override the colormap and visual settings to be
     * the same as the parent window (which is in the container app).
     */

    anyError = 0;
    handler = Tk_CreateErrorHandler(winPtr->display, -1, -1, -1,
	    EmbedErrorProc, (ClientData) &anyError);
    if (!XGetWindowAttributes(winPtr->display, parent, &parentAtts)) {
        anyError =  1;
    }
    XSync(winPtr->display, False);
    Tk_DeleteErrorHandler(handler);
    if (anyError) {
	if (interp != NULL) {
	    Tcl_AppendResult(interp, "couldn't create child of window \"",
		    Tcl_GetString(string), "\"", (char *) NULL);
	}
	return TCL_ERROR;
    }
    Tk_SetWindowVisual(tkwin, parentAtts.visual, parentAtts.depth,
	    parentAtts.colormap);

    /*
     * Create an event handler to clean up the Container structure when
     * tkwin is eventually deleted.
     */

    Tk_CreateEventHandler(tkwin, StructureNotifyMask, EmbeddedEventProc,
	    (ClientData) winPtr);

    /*
     * Save information about the container and the embedded window
     * in a Container structure.  If there is already an existing
     * Container structure, it means that both container and embedded
     * app. are in the same process.
     */

    for (containerPtr = tsdPtr->firstContainerPtr; containerPtr != NULL;
	    containerPtr = containerPtr->nextPtr) {
	if (containerPtr->parent == parent) {
	    winPtr->flags |= TK_BOTH_HALVES;
	    containerPtr->parentPtr->flags |= TK_BOTH_HALVES;
	    break;
	}
    }
    if (containerPtr == NULL) {
	containerPtr = (Container *) ckalloc(sizeof(Container));
	containerPtr->parent = parent;
	containerPtr->parentRoot = parentAtts.root;
	containerPtr->parentPtr = NULL;
	containerPtr->wrapper = None;
	containerPtr->nextPtr = tsdPtr->firstContainerPtr;
	tsdPtr->firstContainerPtr = containerPtr;
    }
    containerPtr->embeddedPtr = winPtr;
    winPtr->flags |= TK_EMBEDDED;
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpMakeWindow --
 *
 *	Create an actual window system window object based on the
 *	current attributes of the specified TkWindow.
 *
 * Results:
 *	Returns the handle to the new window, or None on failure.
 *
 * Side effects:
 *	Creates a new X window.
 *
 *----------------------------------------------------------------------
 */

Window
TkpMakeWindow(winPtr, parent)
    TkWindow *winPtr;		/* Tk's information about the window that
				 * is to be instantiated. */
    Window parent;		/* Window system token for the parent in
				 * which the window is to be created. */
{
    Container *containerPtr;
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    if (winPtr->flags & TK_EMBEDDED) {
	/*
	 * This window is embedded.  Don't create the new window in the
	 * given parent; instead, create it as a child of the root window
	 * of the container's screen.  The window will get reparented
	 * into a wrapper window later.
	 */

	for (containerPtr = tsdPtr->firstContainerPtr; ;
		containerPtr = containerPtr->nextPtr) {
	    if (containerPtr == NULL) {
		panic("TkMakeWindow couldn't find container for window");
	    }
	    if (containerPtr->embeddedPtr == winPtr) {
		break;
	    }
	}
	parent = containerPtr->parentRoot;
    }

#ifdef __PM__
    return TkMakeWindow(winPtr, parent);
#else
    return XCreateWindow(winPtr->display, parent, winPtr->changes.x,
	    winPtr->changes.y, (unsigned) winPtr->changes.width,
	    (unsigned) winPtr->changes.height,
	    (unsigned) winPtr->changes.border_width, winPtr->depth,
	    InputOutput, winPtr->visual, winPtr->dirtyAtts,
	    &winPtr->atts);
#endif
}

/*
 *----------------------------------------------------------------------
 *
 * TkpMakeContainer --
 *
 *	This procedure is called to indicate that a particular window
 *	will be a container for an embedded application.  This changes
 *	certain aspects of the window's behavior, such as whether it
 *	will receive events anymore.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

void
TkpMakeContainer(tkwin)
    Tk_Window tkwin;		/* Token for a window that is about to
				 * become a container. */
{
    TkWindow *winPtr = (TkWindow *) tkwin;
    Container *containerPtr;
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

pTk/mTk/unix/tkUnixEmbed.c  view on Meta::CPAN

	    return containerPtr->embeddedPtr;
	}
    }
    panic("TkpGetOtherWindow couldn't find window");
    return NULL;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpRedirectKeyEvent --
 *
 *	This procedure is invoked when a key press or release event
 *	arrives for an application that does not believe it owns the
 *	input focus.  This can happen because of embedding; for example,
 *	X can send an event to an embedded application when the real
 *	focus window is in the container application and is an ancestor
 *	of the container.  This procedure's job is to forward the event
 *	back to the application where it really belongs.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The event may get sent to a different application.
 *
 *----------------------------------------------------------------------
 */

void
TkpRedirectKeyEvent(winPtr, eventPtr)
    TkWindow *winPtr;		/* Window to which the event was originally
				 * reported. */
    XEvent *eventPtr;		/* X event to redirect (should be KeyPress
				 * or KeyRelease). */
{
    Container *containerPtr;
    Window saved;
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    /*
     * First, find the top-level window corresponding to winPtr.
     */

    while (1) {
	if (winPtr == NULL) {
	    /*
	     * This window is being deleted.  This is too confusing a
	     * case to handle so discard the event.
	     */

	    return;
	}
	if (winPtr->flags & TK_TOP_HIERARCHY) {
	    break;
	}
	winPtr = winPtr->parentPtr;
    }

    if (winPtr->flags & TK_EMBEDDED) {
	/*
	 * This application is embedded.  If we got a key event without
	 * officially having the focus, it means that the focus is
	 * really in the container, but the mouse was over the embedded
	 * application.  Send the event back to the container.
	 */

	for (containerPtr = tsdPtr->firstContainerPtr;
		containerPtr->embeddedPtr != winPtr;
		containerPtr = containerPtr->nextPtr) {
	    /* Empty loop body. */
	}
	saved = eventPtr->xkey.window;
	eventPtr->xkey.window = containerPtr->parent;
	XSendEvent(eventPtr->xkey.display, eventPtr->xkey.window, False,
	    KeyPressMask|KeyReleaseMask, eventPtr);
	eventPtr->xkey.window = saved;
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkpClaimFocus --
 *
 *	This procedure is invoked when someone asks or the input focus
 *	to be put on a window in an embedded application, but the
 *	application doesn't currently have the focus.  It requests the
 *	input focus from the container application.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The input focus may change.
 *
 *----------------------------------------------------------------------
 */

void
TkpClaimFocus(topLevelPtr, force)
    TkWindow *topLevelPtr;		/* Top-level window containing desired
					 * focus window; should be embedded. */
    int force;				/* One means that the container should
					 * claim the focus if it doesn't
					 * currently have it. */
{
    XEvent event;
    Container *containerPtr;
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    if (!(topLevelPtr->flags & TK_EMBEDDED)) {
	return;
    }

    for (containerPtr = tsdPtr->firstContainerPtr;
	    containerPtr->embeddedPtr != topLevelPtr;
	    containerPtr = containerPtr->nextPtr) {
	/* Empty loop body. */
    }

    event.xfocus.type = FocusIn;
    event.xfocus.serial = LastKnownRequestProcessed(topLevelPtr->display);
    event.xfocus.send_event = 1;
    event.xfocus.display = topLevelPtr->display;
    event.xfocus.window = containerPtr->parent;
    event.xfocus.mode = EMBEDDED_APP_WANTS_FOCUS;
    event.xfocus.detail = force;
    XSendEvent(event.xfocus.display, event.xfocus.window, False, 0, &event);
}

#if 0
/*
 *----------------------------------------------------------------------
 *
 * TkpTestembedCmd --
 *
 *	This procedure implements the "testembed" command.  It returns
 *	some or all of the information in the list pointed to by
 *	firstContainerPtr.
 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
TkpTestembedCmd(clientData, interp, argc, argv)
    ClientData clientData;		/* Main window for application. */
    Tcl_Interp *interp;			/* Current interpreter. */
    int argc;				/* Number of arguments. */
    CONST char **argv;			/* Argument strings. */
{
    int all;
    Container *containerPtr;
    Tcl_DString dString;
    char buffer[50];
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    if ((argc > 1) && (strcmp(argv[1], "all") == 0)) {
	all = 1;
    } else {
	all = 0;
    }
    Tcl_DStringInit(&dString);
    for (containerPtr = tsdPtr->firstContainerPtr; containerPtr != NULL;
	    containerPtr = containerPtr->nextPtr) {
	Tcl_DStringStartSublist(&dString);
	if (containerPtr->parent == None) {
	    Tcl_DStringAppendElement(&dString, "");
	} else {
	    if (all) {
		sprintf(buffer, "0x%x", (int) containerPtr->parent);
		Tcl_DStringAppendElement(&dString, buffer);
	    } else {
		Tcl_DStringAppendElement(&dString, "XXX");
	    }
	}
	if (containerPtr->parentPtr == NULL) {
	    Tcl_DStringAppendElement(&dString, "");
	} else {
	    Tcl_DStringAppendElement(&dString,