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578 |
markom |
/*
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* tkWinEmbed.c --
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*
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* This file contains platform specific procedures for Windows platforms
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* to provide basic operations needed for application embedding (where
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* one application can use as its main window an internal window from
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* another application).
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*
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* Copyright (c) 1996 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tkWinEmbed.c,v 1.1.1.1 2002-01-16 10:26:02 markom Exp $
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*/
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#include "tkWinInt.h"
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/*
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* One of the following structures exists for each container in this
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* application. It keeps track of the container window and its
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* associated embedded window.
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*/
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typedef struct Container {
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HWND parentHWnd; /* Windows HWND to the parent window */
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TkWindow *parentPtr; /* Tk's information about the container
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* or NULL if the container isn't
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* in this process. */
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HWND embeddedHWnd; /* Windows HWND to the embedded window
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*/
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TkWindow *embeddedPtr; /* Tk's information about the embedded
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* window, or NULL if the
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* embedded application isn't in
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* this process. */
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struct Container *nextPtr; /* Next in list of all containers in
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* this process. */
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} Container;
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static Container *firstContainerPtr = NULL;
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/* First in list of all containers
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* managed by this process. */
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static void CleanupContainerList _ANSI_ARGS_((
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ClientData clientData));
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static void ContainerEventProc _ANSI_ARGS_((ClientData clientData,
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XEvent *eventPtr));
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static void EmbeddedEventProc _ANSI_ARGS_((
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ClientData clientData, XEvent *eventPtr));
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static void EmbedGeometryRequest _ANSI_ARGS_((
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Container*containerPtr, int width, int height));
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static void EmbedWindowDeleted _ANSI_ARGS_((TkWindow *winPtr));
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/*
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*----------------------------------------------------------------------
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*
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* CleanupContainerList --
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*
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* Finalizes the list of containers.
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*
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* Results:
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* None.
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*
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* Side effects:
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* Releases memory occupied by containers of embedded windows.
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*
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*----------------------------------------------------------------------
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*/
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/* ARGSUSED */
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static void
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CleanupContainerList(clientData)
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ClientData clientData;
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{
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Container *nextPtr;
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for (;
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firstContainerPtr != (Container *) NULL;
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firstContainerPtr = nextPtr) {
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nextPtr = firstContainerPtr->nextPtr;
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ckfree((char *) firstContainerPtr);
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}
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firstContainerPtr = (Container *) NULL;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkpTestembedCmd --
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*
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* Test command for the embedding facility.
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*
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* Results:
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* Always returns TCL_OK.
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*
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* Side effects:
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* Currently it does not do anything.
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*
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*----------------------------------------------------------------------
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*/
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/* ARGSUSED */
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int
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TkpTestembedCmd(clientData, interp, argc, argv)
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ClientData clientData;
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Tcl_Interp *interp;
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int argc;
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char **argv;
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{
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return TCL_OK;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkpUseWindow --
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*
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* This procedure causes a Tk window to use a given Windows handle
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* for a window as its underlying window, rather than a new Windows
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* window being created automatically. It is invoked by an embedded
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* application to specify the window in which the application is
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* embedded.
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*
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* Results:
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* The return value is normally TCL_OK. If an error occurred (such as
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* if the argument does not identify a legal Windows window handle),
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* the return value is TCL_ERROR and an error message is left in the
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* interp->result if interp is not NULL.
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*
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* Side effects:
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* None.
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*
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*----------------------------------------------------------------------
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*/
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int
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TkpUseWindow(interp, tkwin, string)
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Tcl_Interp *interp; /* If not NULL, used for error reporting
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* if string is bogus. */
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Tk_Window tkwin; /* Tk window that does not yet have an
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* associated X window. */
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char *string; /* String identifying an X window to use
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* for tkwin; must be an integer value. */
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{
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TkWindow *winPtr = (TkWindow *) tkwin;
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int id;
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HWND hwnd;
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Container *containerPtr;
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if (winPtr->window != None) {
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panic("TkpUseWindow: Already assigned a window");
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}
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if (Tcl_GetInt(interp, string, &id) != TCL_OK) {
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return TCL_ERROR;
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}
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hwnd = (HWND) id;
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/*
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* Check if the window is a valid handle. If it is invalid, return
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* TCL_ERROR and potentially leave an error message in interp->result.
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*/
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if (!IsWindow(hwnd)) {
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if (interp != (Tcl_Interp *) NULL) {
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Tcl_AppendResult(interp, "window \"", string,
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"\" doesn't exist", (char *) NULL);
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}
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return TCL_ERROR;
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}
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/*
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* Store the parent window in the platform private data slot so
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* TkWmMapWindow can use it when creating the wrapper window.
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*/
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winPtr->privatePtr = (struct TkWindowPrivate*) hwnd;
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/*
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* Create an event handler to clean up the Container structure when
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* tkwin is eventually deleted.
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*/
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Tk_CreateEventHandler(tkwin, StructureNotifyMask, EmbeddedEventProc,
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(ClientData) winPtr);
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/*
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* If this is the first container, register an exit handler so that
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* things will get cleaned up at finalization.
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*/
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if (firstContainerPtr == (Container *) NULL) {
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Tcl_CreateExitHandler(CleanupContainerList, (ClientData) NULL);
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}
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/*
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* Save information about the container and the embedded window
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* in a Container structure. If there is already an existing
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* Container structure, it means that both container and embedded
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* app. are in the same process.
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*/
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for (containerPtr = firstContainerPtr; containerPtr != NULL;
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containerPtr = containerPtr->nextPtr) {
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if (containerPtr->parentHWnd == hwnd) {
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winPtr->flags |= TK_BOTH_HALVES;
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containerPtr->parentPtr->flags |= TK_BOTH_HALVES;
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break;
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}
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}
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if (containerPtr == NULL) {
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containerPtr = (Container *) ckalloc(sizeof(Container));
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containerPtr->parentPtr = NULL;
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containerPtr->parentHWnd = hwnd;
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containerPtr->nextPtr = firstContainerPtr;
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firstContainerPtr = containerPtr;
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}
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/*
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* embeddedHWnd is not created yet. It will be created by TkWmMapWindow(),
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* which will send a TK_ATTACHWINDOW to the container window.
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* TkWinEmbeddedEventProc will process this message and set the embeddedHWnd
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* variable
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*/
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containerPtr->embeddedPtr = winPtr;
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containerPtr->embeddedHWnd = NULL;
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winPtr->flags |= TK_EMBEDDED;
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winPtr->flags &= (~(TK_MAPPED));
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return TCL_OK;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkpMakeContainer --
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*
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* This procedure is called to indicate that a particular window will
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* be a container for an embedded application. This changes certain
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* aspects of the window's behavior, such as whether it will receive
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* events anymore.
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*
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* Results:
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* None.
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*
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* Side effects:
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* None.
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*
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*----------------------------------------------------------------------
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*/
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void
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TkpMakeContainer(tkwin)
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Tk_Window tkwin;
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{
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TkWindow *winPtr = (TkWindow *) tkwin;
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Container *containerPtr;
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/*
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* If this is the first container, register an exit handler so that
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* things will get cleaned up at finalization.
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*/
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if (firstContainerPtr == (Container *) NULL) {
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Tcl_CreateExitHandler(CleanupContainerList, (ClientData) NULL);
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}
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/*
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* Register the window as a container so that, for example, we can
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* find out later if the embedded app. is in the same process.
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*/
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Tk_MakeWindowExist(tkwin);
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containerPtr = (Container *) ckalloc(sizeof(Container));
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containerPtr->parentPtr = winPtr;
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containerPtr->parentHWnd = Tk_GetHWND(Tk_WindowId(tkwin));
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containerPtr->embeddedHWnd = NULL;
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containerPtr->embeddedPtr = NULL;
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282 |
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containerPtr->nextPtr = firstContainerPtr;
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firstContainerPtr = containerPtr;
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winPtr->flags |= TK_CONTAINER;
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/*
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* Unlike in tkUnixEmbed.c, we don't make any requests for events
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* in the embedded window here. Now we just allow the embedding
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* of another TK application into TK windows. When the embedded
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* window makes a request, that will be done by sending to the
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* container window a WM_USER message, which will be intercepted
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* by TkWinContainerProc.
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293 |
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*
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294 |
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* We need to get structure events of the container itself, though.
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*/
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296 |
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Tk_CreateEventHandler(tkwin, StructureNotifyMask,
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298 |
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ContainerEventProc, (ClientData) containerPtr);
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}
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300 |
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301 |
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/*
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302 |
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*----------------------------------------------------------------------
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303 |
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*
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304 |
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* EmbeddedEventProc --
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305 |
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*
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306 |
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* This procedure is invoked by the Tk event dispatcher when various
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307 |
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* useful events are received for a window that is embedded in
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308 |
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* another application.
|
309 |
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*
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310 |
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* Results:
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311 |
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* None.
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312 |
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*
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313 |
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* Side effects:
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314 |
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* Our internal state gets cleaned up when an embedded window is
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315 |
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* destroyed.
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316 |
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*
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317 |
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*----------------------------------------------------------------------
|
318 |
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*/
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319 |
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320 |
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static void
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321 |
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EmbeddedEventProc(clientData, eventPtr)
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322 |
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ClientData clientData; /* Token for container window. */
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323 |
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XEvent *eventPtr; /* ResizeRequest event. */
|
324 |
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{
|
325 |
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TkWindow *winPtr = (TkWindow *) clientData;
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326 |
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327 |
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if (eventPtr->type == DestroyNotify) {
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328 |
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EmbedWindowDeleted(winPtr);
|
329 |
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}
|
330 |
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}
|
331 |
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|
332 |
|
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/*
|
333 |
|
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*----------------------------------------------------------------------
|
334 |
|
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*
|
335 |
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* TkWinEmbeddedEventProc --
|
336 |
|
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*
|
337 |
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* This procedure is invoked by the Tk event dispatcher when
|
338 |
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* various useful events are received for the *children* of a
|
339 |
|
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* container window. It forwards relevant information, such as
|
340 |
|
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* geometry requests, from the events into the container's
|
341 |
|
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* application.
|
342 |
|
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*
|
343 |
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* Results:
|
344 |
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* None.
|
345 |
|
|
*
|
346 |
|
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* Side effects:
|
347 |
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* Depends on the event. For example, when ConfigureRequest events
|
348 |
|
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* occur, geometry information gets set for the container window.
|
349 |
|
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*
|
350 |
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*----------------------------------------------------------------------
|
351 |
|
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*/
|
352 |
|
|
|
353 |
|
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LRESULT
|
354 |
|
|
TkWinEmbeddedEventProc(hwnd, message, wParam, lParam)
|
355 |
|
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HWND hwnd;
|
356 |
|
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UINT message;
|
357 |
|
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WPARAM wParam;
|
358 |
|
|
LPARAM lParam;
|
359 |
|
|
{
|
360 |
|
|
Container *containerPtr;
|
361 |
|
|
|
362 |
|
|
/*
|
363 |
|
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* Find the Container structure associated with the parent window.
|
364 |
|
|
*/
|
365 |
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|
366 |
|
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for (containerPtr = firstContainerPtr;
|
367 |
|
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containerPtr->parentHWnd != hwnd;
|
368 |
|
|
containerPtr = containerPtr->nextPtr) {
|
369 |
|
|
if (containerPtr == NULL) {
|
370 |
|
|
panic("TkWinContainerProc couldn't find Container record");
|
371 |
|
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}
|
372 |
|
|
}
|
373 |
|
|
|
374 |
|
|
switch (message) {
|
375 |
|
|
case TK_ATTACHWINDOW:
|
376 |
|
|
/* An embedded window (either from this application or from
|
377 |
|
|
* another application) is trying to attach to this container.
|
378 |
|
|
* We attach it only if this container is not yet containing any
|
379 |
|
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* window.
|
380 |
|
|
*/
|
381 |
|
|
if (containerPtr->embeddedHWnd == NULL) {
|
382 |
|
|
containerPtr->embeddedHWnd = (HWND)wParam;
|
383 |
|
|
} else {
|
384 |
|
|
return 0;
|
385 |
|
|
}
|
386 |
|
|
|
387 |
|
|
break;
|
388 |
|
|
case TK_GEOMETRYREQ:
|
389 |
|
|
EmbedGeometryRequest(containerPtr, wParam, lParam);
|
390 |
|
|
break;
|
391 |
|
|
}
|
392 |
|
|
return 1;
|
393 |
|
|
}
|
394 |
|
|
|
395 |
|
|
/*
|
396 |
|
|
*----------------------------------------------------------------------
|
397 |
|
|
*
|
398 |
|
|
* EmbedGeometryRequest --
|
399 |
|
|
*
|
400 |
|
|
* This procedure is invoked when an embedded application requests
|
401 |
|
|
* a particular size. It processes the request (which may or may
|
402 |
|
|
* not actually resize the window) and reflects the results back
|
403 |
|
|
* to the embedded application.
|
404 |
|
|
*
|
405 |
|
|
* Results:
|
406 |
|
|
* None.
|
407 |
|
|
*
|
408 |
|
|
* Side effects:
|
409 |
|
|
* If we deny the child's size change request, a Configure event
|
410 |
|
|
* is synthesized to let the child know that the size is the same
|
411 |
|
|
* as it used to be. Events get processed while we're waiting for
|
412 |
|
|
* the geometry managers to do their thing.
|
413 |
|
|
*
|
414 |
|
|
*----------------------------------------------------------------------
|
415 |
|
|
*/
|
416 |
|
|
|
417 |
|
|
void
|
418 |
|
|
EmbedGeometryRequest(containerPtr, width, height)
|
419 |
|
|
Container *containerPtr; /* Information about the container window. */
|
420 |
|
|
int width, height; /* Size that the child has requested. */
|
421 |
|
|
{
|
422 |
|
|
TkWindow * winPtr = containerPtr->parentPtr;
|
423 |
|
|
|
424 |
|
|
/*
|
425 |
|
|
* Forward the requested size into our geometry management hierarchy
|
426 |
|
|
* via the container window. We need to send a Configure event back
|
427 |
|
|
* to the embedded application even if we decide not to resize
|
428 |
|
|
* the window; to make this happen, process all idle event handlers
|
429 |
|
|
* synchronously here (so that the geometry managers have had a
|
430 |
|
|
* chance to do whatever they want to do), and if the window's size
|
431 |
|
|
* didn't change then generate a configure event.
|
432 |
|
|
*/
|
433 |
|
|
Tk_GeometryRequest((Tk_Window)winPtr, width, height);
|
434 |
|
|
|
435 |
|
|
if (containerPtr->embeddedHWnd != NULL) {
|
436 |
|
|
while (Tcl_DoOneEvent(TCL_IDLE_EVENTS)) {
|
437 |
|
|
/* Empty loop body. */
|
438 |
|
|
}
|
439 |
|
|
|
440 |
|
|
SetWindowPos(containerPtr->embeddedHWnd, NULL,
|
441 |
|
|
0, 0, winPtr->changes.width, winPtr->changes.height, SWP_NOZORDER);
|
442 |
|
|
}
|
443 |
|
|
}
|
444 |
|
|
|
445 |
|
|
/*
|
446 |
|
|
*----------------------------------------------------------------------
|
447 |
|
|
*
|
448 |
|
|
* ContainerEventProc --
|
449 |
|
|
*
|
450 |
|
|
* This procedure is invoked by the Tk event dispatcher when
|
451 |
|
|
* various useful events are received for the container window.
|
452 |
|
|
*
|
453 |
|
|
* Results:
|
454 |
|
|
* None.
|
455 |
|
|
*
|
456 |
|
|
* Side effects:
|
457 |
|
|
* Depends on the event. For example, when ConfigureRequest events
|
458 |
|
|
* occur, geometry information gets set for the container window.
|
459 |
|
|
*
|
460 |
|
|
*----------------------------------------------------------------------
|
461 |
|
|
*/
|
462 |
|
|
|
463 |
|
|
static void
|
464 |
|
|
ContainerEventProc(clientData, eventPtr)
|
465 |
|
|
ClientData clientData; /* Token for container window. */
|
466 |
|
|
XEvent *eventPtr; /* ResizeRequest event. */
|
467 |
|
|
{
|
468 |
|
|
Container *containerPtr = (Container *)clientData;
|
469 |
|
|
Tk_Window tkwin = (Tk_Window)containerPtr->parentPtr;
|
470 |
|
|
|
471 |
|
|
if (eventPtr->type == ConfigureNotify) {
|
472 |
|
|
if (containerPtr->embeddedPtr == NULL) {
|
473 |
|
|
return;
|
474 |
|
|
}
|
475 |
|
|
/* Resize the embedded window, if there is any */
|
476 |
|
|
if (containerPtr->embeddedHWnd) {
|
477 |
|
|
SetWindowPos(containerPtr->embeddedHWnd, NULL,
|
478 |
|
|
0, 0, Tk_Width(tkwin), Tk_Height(tkwin), SWP_NOZORDER);
|
479 |
|
|
}
|
480 |
|
|
} else if (eventPtr->type == DestroyNotify) {
|
481 |
|
|
/* The container is gone, remove it from the list */
|
482 |
|
|
EmbedWindowDeleted(containerPtr->parentPtr);
|
483 |
|
|
}
|
484 |
|
|
}
|
485 |
|
|
|
486 |
|
|
/*
|
487 |
|
|
*----------------------------------------------------------------------
|
488 |
|
|
*
|
489 |
|
|
* TkpGetOtherWindow --
|
490 |
|
|
*
|
491 |
|
|
* If both the container and embedded window are in the same
|
492 |
|
|
* process, this procedure will return either one, given the other.
|
493 |
|
|
*
|
494 |
|
|
* Results:
|
495 |
|
|
* If winPtr is a container, the return value is the token for the
|
496 |
|
|
* embedded window, and vice versa. If the "other" window isn't in
|
497 |
|
|
* this process, NULL is returned.
|
498 |
|
|
*
|
499 |
|
|
* Side effects:
|
500 |
|
|
* None.
|
501 |
|
|
*
|
502 |
|
|
*----------------------------------------------------------------------
|
503 |
|
|
*/
|
504 |
|
|
|
505 |
|
|
TkWindow *
|
506 |
|
|
TkpGetOtherWindow(winPtr)
|
507 |
|
|
TkWindow *winPtr; /* Tk's structure for a container or
|
508 |
|
|
* embedded window. */
|
509 |
|
|
{
|
510 |
|
|
Container *containerPtr;
|
511 |
|
|
|
512 |
|
|
for (containerPtr = firstContainerPtr; containerPtr != NULL;
|
513 |
|
|
containerPtr = containerPtr->nextPtr) {
|
514 |
|
|
if (containerPtr->embeddedPtr == winPtr) {
|
515 |
|
|
return containerPtr->parentPtr;
|
516 |
|
|
} else if (containerPtr->parentPtr == winPtr) {
|
517 |
|
|
return containerPtr->embeddedPtr;
|
518 |
|
|
}
|
519 |
|
|
}
|
520 |
|
|
panic("TkpGetOtherWindow couldn't find window");
|
521 |
|
|
return NULL;
|
522 |
|
|
}
|
523 |
|
|
|
524 |
|
|
/*
|
525 |
|
|
*----------------------------------------------------------------------
|
526 |
|
|
*
|
527 |
|
|
* TkpClaimFocus --
|
528 |
|
|
*
|
529 |
|
|
* This procedure is invoked when someone asks or the input focus
|
530 |
|
|
* to be put on a window in an embedded application, but the
|
531 |
|
|
* application doesn't currently have the focus. It requests the
|
532 |
|
|
* input focus from the container application.
|
533 |
|
|
*
|
534 |
|
|
* Results:
|
535 |
|
|
* None.
|
536 |
|
|
*
|
537 |
|
|
* Side effects:
|
538 |
|
|
* The input focus may change.
|
539 |
|
|
*
|
540 |
|
|
*----------------------------------------------------------------------
|
541 |
|
|
*/
|
542 |
|
|
|
543 |
|
|
void
|
544 |
|
|
TkpClaimFocus(topLevelPtr, force)
|
545 |
|
|
TkWindow *topLevelPtr; /* Top-level window containing desired
|
546 |
|
|
* focus window; should be embedded. */
|
547 |
|
|
int force; /* One means that the container should
|
548 |
|
|
* claim the focus if it doesn't
|
549 |
|
|
* currently have it. */
|
550 |
|
|
{
|
551 |
|
|
HWND hwnd = GetParent(Tk_GetHWND(topLevelPtr->window));
|
552 |
|
|
SendMessage(hwnd, TK_CLAIMFOCUS, (WPARAM) force, 0);
|
553 |
|
|
}
|
554 |
|
|
|
555 |
|
|
/*
|
556 |
|
|
*----------------------------------------------------------------------
|
557 |
|
|
*
|
558 |
|
|
* TkpRedirectKeyEvent --
|
559 |
|
|
*
|
560 |
|
|
* This procedure is invoked when a key press or release event
|
561 |
|
|
* arrives for an application that does not believe it owns the
|
562 |
|
|
* input focus. This can happen because of embedding; for example,
|
563 |
|
|
* X can send an event to an embedded application when the real
|
564 |
|
|
* focus window is in the container application and is an ancestor
|
565 |
|
|
* of the container. This procedure's job is to forward the event
|
566 |
|
|
* back to the application where it really belongs.
|
567 |
|
|
*
|
568 |
|
|
* Results:
|
569 |
|
|
* None.
|
570 |
|
|
*
|
571 |
|
|
* Side effects:
|
572 |
|
|
* The event may get sent to a different application.
|
573 |
|
|
*
|
574 |
|
|
*----------------------------------------------------------------------
|
575 |
|
|
*/
|
576 |
|
|
|
577 |
|
|
void
|
578 |
|
|
TkpRedirectKeyEvent(winPtr, eventPtr)
|
579 |
|
|
TkWindow *winPtr; /* Window to which the event was originally
|
580 |
|
|
* reported. */
|
581 |
|
|
XEvent *eventPtr; /* X event to redirect (should be KeyPress
|
582 |
|
|
* or KeyRelease). */
|
583 |
|
|
{
|
584 |
|
|
/* not implemented */
|
585 |
|
|
}
|
586 |
|
|
|
587 |
|
|
/*
|
588 |
|
|
*----------------------------------------------------------------------
|
589 |
|
|
*
|
590 |
|
|
* EmbedWindowDeleted --
|
591 |
|
|
*
|
592 |
|
|
* This procedure is invoked when a window involved in embedding
|
593 |
|
|
* (as either the container or the embedded application) is
|
594 |
|
|
* destroyed. It cleans up the Container structure for the window.
|
595 |
|
|
*
|
596 |
|
|
* Results:
|
597 |
|
|
* None.
|
598 |
|
|
*
|
599 |
|
|
* Side effects:
|
600 |
|
|
* A Container structure may be freed.
|
601 |
|
|
*
|
602 |
|
|
*----------------------------------------------------------------------
|
603 |
|
|
*/
|
604 |
|
|
|
605 |
|
|
static void
|
606 |
|
|
EmbedWindowDeleted(winPtr)
|
607 |
|
|
TkWindow *winPtr; /* Tk's information about window that
|
608 |
|
|
* was deleted. */
|
609 |
|
|
{
|
610 |
|
|
Container *containerPtr, *prevPtr;
|
611 |
|
|
|
612 |
|
|
/*
|
613 |
|
|
* Find the Container structure for this window work. Delete the
|
614 |
|
|
* information about the embedded application and free the container's
|
615 |
|
|
* record.
|
616 |
|
|
*/
|
617 |
|
|
|
618 |
|
|
prevPtr = NULL;
|
619 |
|
|
containerPtr = firstContainerPtr;
|
620 |
|
|
while (1) {
|
621 |
|
|
if (containerPtr->embeddedPtr == winPtr) {
|
622 |
|
|
containerPtr->embeddedHWnd = NULL;
|
623 |
|
|
containerPtr->embeddedPtr = NULL;
|
624 |
|
|
break;
|
625 |
|
|
}
|
626 |
|
|
if (containerPtr->parentPtr == winPtr) {
|
627 |
|
|
containerPtr->parentPtr = NULL;
|
628 |
|
|
break;
|
629 |
|
|
}
|
630 |
|
|
prevPtr = containerPtr;
|
631 |
|
|
containerPtr = containerPtr->nextPtr;
|
632 |
|
|
if (containerPtr == NULL) {
|
633 |
|
|
panic("EmbedWindowDeleted couldn't find window");
|
634 |
|
|
}
|
635 |
|
|
}
|
636 |
|
|
if ((containerPtr->embeddedPtr == NULL)
|
637 |
|
|
&& (containerPtr->parentPtr == NULL)) {
|
638 |
|
|
if (prevPtr == NULL) {
|
639 |
|
|
firstContainerPtr = containerPtr->nextPtr;
|
640 |
|
|
} else {
|
641 |
|
|
prevPtr->nextPtr = containerPtr->nextPtr;
|
642 |
|
|
}
|
643 |
|
|
ckfree((char *) containerPtr);
|
644 |
|
|
}
|
645 |
|
|
}
|