path: root/src/util/clientGUIUtils.cpp

#include "clientGUIUtils.h"

BlankScreen::BlankScreen()
{
    dpy = X11Info::display();
    scr = DefaultScreen(dpy);
    assert(dpy);
    blackColor = BlackPixel(dpy, DefaultScreen(dpy));
    whiteColor = WhitePixel(dpy, DefaultScreen(dpy));
//    win = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 0, 0, 200, 100, 0, blackColor, whiteColor);
    win = XCreateSimpleWindow(dpy, RootWindow(dpy, scr), 10, 10, 200, 200, 1, WhitePixel(dpy, scr), BlackPixel(dpy, scr));

    XSelectInput(dpy, win, ExposureMask | KeyPressMask);
    locked = false;
    offX = offY = 0;
}

void BlankScreen::draw(bool force)
{
    if (locked)// no need to draw if we're not showing the window
    {
        XWindowAttributes xwa;
        XGetWindowAttributes(dpy, DefaultRootWindow(dpy), &xwa);
        int hx = (xwa.width)>>2, hy = (xwa.height)>>2;

        if (XCheckTypedEvent(dpy, Expose, &ev) || force )
        {
            hx += offX;
            hy += offY;

            GC gcc = XCreateGC(dpy, win, 0, NULL);
            XSetForeground(dpy, gcc, whiteColor);
//            XClearArea(dpy, win, 0, 0, xwa.width, xwa.height, false);
            if (lockMsg.size() > 0)
            {
                char *msg = const_cast<char*>(lockMsg.toUtf8().data());
                XDrawString(dpy, win, gcc/*DefaultGC(dpy, scr)*/, hx, hy, msg, strlen(msg));
            }
            else
            {
            }
        }
    }
}

bool BlankScreen::lock()
{
#define lock_test

    if (locked)
        return locked;

    // We want to get MapNotify events
    XSelectInput(dpy, win, StructureNotifyMask);

    // "Map" the window (that is, make it appear on the screen)
    XMapWindow(dpy, win);

    // Create a "Graphics Context"
    //GC gc = XCreateGC(dpy, win, 0, NULL);

    XEvent xev;
    Atom wm_state = XInternAtom(dpy, "_NET_WM_STATE", False);
    Atom fullscreen = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
    memset(&xev, 0, sizeof(xev));
    xev.type = ClientMessage;
    xev.xclient.window = win;
    xev.xclient.message_type = wm_state;
    xev.xclient.format = 32;
    xev.xclient.data.l[0] = 1;
    xev.xclient.data.l[1] = fullscreen;
    xev.xclient.data.l[2] = 0;

    XSendEvent(dpy, DefaultRootWindow(dpy), False,
               SubstructureNotifyMask, &xev);




    // Wait for the MapNotify event
    for (;;)
    {
        XEvent e;
        XNextEvent(dpy, &e);
        if (e.type == MapNotify)
            break;
    }
    //Flush it!
    //XFlush(dpy);

#ifndef lock_test
    // load the locked cursor, so people dont think they can click anything
    // TODO: Use some kind of invisible cursor instead of the wait-cursor
    Cursor locked_cur = XCreateFontCursor(dpy, XC_watch);
    XDefineCursor(dpy, DefaultRootWindow(dpy),locked_cur);
#endif

    // grabbing of keyboard and mouse and hide the cursor
    XGrabKeyboard(dpy, DefaultRootWindow(dpy), false, GrabModeAsync, GrabModeAsync, CurrentTime);
    XGrabPointer(dpy, DefaultRootWindow(dpy), false, 0, GrabModeAsync, GrabModeAsync, None, NULL, CurrentTime);

    if (!locked)
        ConsoleLog writeLine(QString("Locked"));

    // see header for more information on this switch
    return locked = true;
}

bool BlankScreen::lock_inputs()
{
    // grabbing of keyboard and mouse and hide the cursor
    XGrabKeyboard(dpy, DefaultRootWindow(dpy), false, GrabModeAsync, GrabModeAsync, CurrentTime);
    XGrabPointer(dpy, DefaultRootWindow(dpy), false, 0, GrabModeAsync, GrabModeAsync, None, NULL, CurrentTime);
    return true;
}

bool BlankScreen::unlock()
{

    if (dpy)
    {

        int retval = -1;

        //reset cursor to arrow (no *real* default here...)
        Cursor normal_cur = XCreateFontCursor(dpy, XC_arrow);
        XDefineCursor(dpy, DefaultRootWindow(dpy), normal_cur);

        // ungrabbing of keyboard and mouse
        XUngrabPointer(dpy, CurrentTime);
        XUngrabKeyboard(dpy, CurrentTime);


        retval = XUnmapWindow(dpy,win);
        if (retval == BadWindow)
            ConsoleLog writeError(QString("Bad window while unmapping. Badwindow: ").append(int2String(retval)));
        XFlush(dpy);
    }
    if (locked)
        ConsoleLog writeLine(QString("Unlocked"));

    lockMsg.clear();
    return !(locked = false);
}