[ericshliao]

Based on my current experience, all GTK+ apps can respond to iLiad buttons without any problem. But I found that I can't make QT based app (djview4) and wxWidgets based app (xCHM) respond to iLiad button, even though I can control iLiad led flash and use touch-pen as mouse in these apps.

My current understanding is:
Contentlister will grab all iLiad button-events by calling button driver. Then, a button-event will be translated to an X event and transferred to the foreground x-client using the following function in programManager.c:

void pm_SendKey(KeySym keysym)
{
    XKeyEvent xev;
    Display *display;
    Window  window, root;
    int     screen;

    display = gdk_x11_display_get_xdisplay(gdk_display_get_default());
    root = gdk_x11_get_default_root_xwindow();
    window = pm_getWinOnTop();
    if (window == -1)
    {
        CL_ERRORPRINTF("Failed: no valid window found");
        return;
    }

    if (window == g_myWin)
    {
        CL_PMPRINTF("ContentLister window 0x%x", (unsigned int)window);

        display = XOpenDisplay(NULL);
        screen = DefaultScreen(display);
        root = RootWindow(display, screen);
    }

    // create and send a keypress event followed by a keyrelease event 
    xev.type = KeyPress;
    xev.display = display;
    xev.root = root;
    xev.window = window;
    xev.subwindow = None;
    xev.time = pm_fake_timestamp();
    xev.x = 1;
    xev.y = 1;
    xev.x_root = 1;
    xev.y_root = 1;
    xev.same_screen = 1;
    xev.state = 0;
    xev.keycode = XKeysymToKeycode(display, keysym);
//    CL_ERRORPRINTF("Sending keypress....");
    XSendEvent(xev.display, window, 1, KeyPressMask, (XEvent *) & xev);

    // We check to see if this is the UP key
    // so we don't send the release event for that, because it
    // can crash the contentLister with a BadWindow error (req.code 25)
    if ( keysym == GDK_F5 )
    {
        CL_ERRORPRINTF("NOT Sending keyrelease for UP key....");
    }
    else
    {
//        usleep(2000); // MvdW: this usleep doesn't seem to be nescessary
        xev.type = KeyRelease;
        xev.time = pm_fake_timestamp();
        XSendEvent(xev.display, window, 1, KeyReleaseMask, (XEvent *) & xev);
    }

    //XSync(xev.display, 1);
    XSync(xev.display, FALSE);

    if (window == g_myWin)
    {
        CL_PMPRINTF("Before XCloseDisplay()");
        XCloseDisplay(display);
    }
}

I just can't figure out why do these x apps can't respond to iLiad button event. Does anybody have an idea how to solve or trace the problem?