tkwinembed.c

linux系统下的音频通信

{
    TkWindow *winPtr = (TkWindow *) clientData;

    if (eventPtr->type == DestroyNotify) {
	EmbedWindowDeleted(winPtr);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkWinEmbeddedEventProc --
 *
 *	This procedure is invoked by the Tk event dispatcher when
 *	various useful events are received for the *children* of a
 *	container window. It forwards relevant information, such as
 *	geometry requests, from the events into the container's
 *	application.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Depends on the event.  For example, when ConfigureRequest events
 *	occur, geometry information gets set for the container window.
 *
 *----------------------------------------------------------------------
 */

LRESULT
TkWinEmbeddedEventProc(hwnd, message, wParam, lParam)
    HWND hwnd;
    UINT message;
    WPARAM wParam;
    LPARAM lParam;
{
    Container *containerPtr;

    /*
     * Find the Container structure associated with the parent window.
     */

    for (containerPtr = firstContainerPtr;
	    containerPtr->parentHWnd != hwnd;
	    containerPtr = containerPtr->nextPtr) {
	if (containerPtr == NULL) {
	    panic("TkWinContainerProc couldn't find Container record");
	}
    }

    switch (message) {
      case TK_ATTACHWINDOW:
	/* An embedded window (either from this application or from
	 * another application) is trying to attach to this container.
	 * We attach it only if this container is not yet containing any
	 * window.
	 */
	if (containerPtr->embeddedHWnd == NULL) {
	    containerPtr->embeddedHWnd = (HWND)wParam;
	} else {
	    return 0;
	}

	break;
      case TK_GEOMETRYREQ:
	EmbedGeometryRequest(containerPtr, wParam, lParam);
	break;
    }
    return 1;
}

/*
 *----------------------------------------------------------------------
 *
 * EmbedGeometryRequest --
 *
 *	This procedure is invoked when an embedded application requests
 *	a particular size.  It processes the request (which may or may
 *	not actually resize the window) and reflects the results back
 *	to the embedded application.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	If we deny the child's size change request, a Configure event
 *	is synthesized to let the child know that the size is the same
 *	as it used to be.  Events get processed while we're waiting for
 *	the geometry managers to do their thing.
 *
 *----------------------------------------------------------------------
 */

void
EmbedGeometryRequest(containerPtr, width, height)
    Container *containerPtr;	/* Information about the container window. */
    int width, height;		/* Size that the child has requested. */
{
    TkWindow * winPtr = containerPtr->parentPtr;
    
    /*
     * Forward the requested size into our geometry management hierarchy
     * via the container window.  We need to send a Configure event back
     * to the embedded application even if we decide not to resize
     * the window;  to make this happen, process all idle event handlers
     * synchronously here (so that the geometry managers have had a
     * chance to do whatever they want to do), and if the window's size
     * didn't change then generate a configure event.
     */
    Tk_GeometryRequest((Tk_Window)winPtr, width, height);

    if (containerPtr->embeddedHWnd != NULL) {
	while (Tcl_DoOneEvent(TCL_IDLE_EVENTS)) {
	    /* Empty loop body. */
	}

	SetWindowPos(containerPtr->embeddedHWnd, NULL,
	    0, 0, winPtr->changes.width, winPtr->changes.height, SWP_NOZORDER);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * ContainerEventProc --
 *
 *	This procedure is invoked by the Tk event dispatcher when
 *	various useful events are received for the container window.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Depends on the event.  For example, when ConfigureRequest events
 *	occur, geometry information gets set for the container window.
 *
 *----------------------------------------------------------------------
 */

static void
ContainerEventProc(clientData, eventPtr)
    ClientData clientData;		/* Token for container window. */
    XEvent *eventPtr;			/* ResizeRequest event. */
{
    Container *containerPtr = (Container *)clientData;
    Tk_Window tkwin = (Tk_Window)containerPtr->parentPtr;

    if (eventPtr->type == ConfigureNotify) {
	if (containerPtr->embeddedPtr == NULL) {
	    return;
	}
	/* Resize the embedded window, if there is any */
	if (containerPtr->embeddedHWnd) {
	    SetWindowPos(containerPtr->embeddedHWnd, NULL,
	        0, 0, Tk_Width(tkwin), Tk_Height(tkwin), SWP_NOZORDER);
	}
    } else if (eventPtr->type == DestroyNotify) {
	/* The container is gone, remove it from the list */
	EmbedWindowDeleted(containerPtr->parentPtr);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkpGetOtherWindow --
 *
 *	If both the container and embedded window are in the same
 *	process, this procedure will return either one, given the other.
 *
 * Results:
 *	If winPtr is a container, the return value is the token for the
 *	embedded window, and vice versa.  If the "other" window isn't in
 *	this process, NULL is returned.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

TkWindow *
TkpGetOtherWindow(winPtr)
    TkWindow *winPtr;		/* Tk's structure for a container or
				 * embedded window. */
{
    Container *containerPtr;

    for (containerPtr = firstContainerPtr; containerPtr != NULL;
	    containerPtr = containerPtr->nextPtr) {
	if (containerPtr->embeddedPtr == winPtr) {
	    return containerPtr->parentPtr;
	} else if (containerPtr->parentPtr == winPtr) {
	    return containerPtr->embeddedPtr;
	}
    }
    panic("TkpGetOtherWindow couldn't find window");
    return NULL;
}

/*
 *----------------------------------------------------------------------
 *
 * 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. */
{
    HWND hwnd = GetParent(Tk_GetHWND(topLevelPtr->window));
    SendMessage(hwnd, TK_CLAIMFOCUS, (WPARAM) force, 0);
}

/*
 *----------------------------------------------------------------------
 *
 * 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). */
{
    /* not implemented */
}

/*
 *----------------------------------------------------------------------
 *
 * EmbedWindowDeleted --
 *
 *	This procedure is invoked when a window involved in embedding
 *	(as either the container or the embedded application) is
 *	destroyed.  It cleans up the Container structure for the window.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	A Container structure may be freed.
 *
 *----------------------------------------------------------------------
 */

static void
EmbedWindowDeleted(winPtr)
    TkWindow *winPtr;		/* Tk's information about window that
				 * was deleted. */
{
    Container *containerPtr, *prevPtr;

    /*
     * Find the Container structure for this window work.  Delete the
     * information about the embedded application and free the container's
     * record.
     */

    prevPtr = NULL;
    containerPtr = firstContainerPtr;
    while (1) {
	if (containerPtr->embeddedPtr == winPtr) {
	    containerPtr->embeddedHWnd = NULL;
	    containerPtr->embeddedPtr = NULL;
	    break;
	}
	if (containerPtr->parentPtr == winPtr) {
	    containerPtr->parentPtr = NULL;
	    break;
	}
	prevPtr = containerPtr;
	containerPtr = containerPtr->nextPtr;
	if (containerPtr == NULL) {
	    panic("EmbedWindowDeleted couldn't find window");
	}
    }
    if ((containerPtr->embeddedPtr == NULL)
	    && (containerPtr->parentPtr == NULL)) {
	if (prevPtr == NULL) {
	    firstContainerPtr = containerPtr->nextPtr;
	} else {
	    prevPtr->nextPtr = containerPtr->nextPtr;
	}
	ckfree((char *) containerPtr);
    }
}