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/////////////////////////////////////////////////////////////////////////
// Copyright 2011-2018 Simon Schneegans
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
/////////////////////////////////////////////////////////////////////////
namespace GnomePie {
/////////////////////////////////////////////////////////////////////////
/// Some helper methods which focus the input on a given Gtk.Window.
/////////////////////////////////////////////////////////////////////////
public class FocusGrabber : GLib.Object {
/////////////////////////////////////////////////////////////////////
/// Utilities for grabbing focus.
/// Code roughly from Gnome-Do/Synapse.
/////////////////////////////////////////////////////////////////////
public static void grab(Gdk.Window window) {
window.raise();
window.focus(Gdk.CURRENT_TIME);
if (!try_grab_window(window)) {
int i = 0;
Timeout.add(100, () => {
if (++i >= 100) return false;
return !try_grab_window(window);
});
}
}
/////////////////////////////////////////////////////////////////////
/// Code roughly from Gnome-Do/Synapse.
/////////////////////////////////////////////////////////////////////
public static void ungrab() {
#if HAVE_GTK_3_20
var seat = Gdk.Display.get_default().get_default_seat();
seat.ungrab();
#else
var display = Gdk.Display.get_default();
var manager = display.get_device_manager();
GLib.List<weak Gdk.Device?> list = manager.list_devices(Gdk.DeviceType.MASTER);
foreach(var device in list) {
device.ungrab(Gdk.CURRENT_TIME);
}
#endif
}
/////////////////////////////////////////////////////////////////////
/// Code roughly from Gnome-Do/Synapse.
/////////////////////////////////////////////////////////////////////
private static bool try_grab_window(Gdk.Window window) {
#if HAVE_GTK_3_20
// try again if window is not yet viewable
if (!window.is_viewable()) return false;
var seat = Gdk.Display.get_default().get_default_seat();
var caps = Gdk.SeatCapabilities.POINTER | Gdk.SeatCapabilities.KEYBOARD;
var result = seat.grab(window, caps, true, null, null, null);
// for some reason GDK hides the window if the grab fails...
if (result != Gdk.GrabStatus.SUCCESS) {
window.show();
}
// continue trying to grab if it failed!
return result == Gdk.GrabStatus.SUCCESS;
#else
var display = Gdk.Display.get_default();
var manager = display.get_device_manager();
bool grabbed_all = true;
GLib.List<weak Gdk.Device?> list = manager.list_devices(Gdk.DeviceType.MASTER);
foreach(var device in list) {
var status = device.grab(window, Gdk.GrabOwnership.APPLICATION, true,
Gdk.EventMask.ALL_EVENTS_MASK, null, Gdk.CURRENT_TIME);
if (status != Gdk.GrabStatus.SUCCESS)
grabbed_all = false;
}
if (grabbed_all)
return true;
ungrab();
return false;
#endif
}
}
}
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