client: improve screen resizing

Screen now have to modes locked and unlocked.

In unlocked mode, the application can change screen size and so
reduce resolution changing. The application can also choose to
change window size while not in full screen mode.

In locked mode the application must ewtain locker screen size
setting.

1 files changed, 29 insertions, 2 deletions

diff --git a/client/display_channel.cpp b/client/display_channel.cpp
index 9f8fba80..0050a21c 100644
--- a/client/display_channel.cpp
+++ b/client/display_channel.cpp
@@ -60,7 +60,8 @@ public:
     {
         Application* app = (Application*)events_loop.get_owner();
         _channel.destroy_canvas();
-        _channel.screen()->set_mode(_width, _height, _depth);
+        _channel.screen()->lock_size();
+        _channel.screen()->resize(_width, _height);
         _channel.create_canvas(app->get_canvas_types(), _width, _height, _depth);
     }
 
@@ -71,6 +72,22 @@ private:
     int _depth;
 };
 
+class UnlockScreenEvent: public Event {
+public:
+    UnlockScreenEvent(RedScreen* screen)
+        : _screen (screen->ref())
+    {
+    }
+
+    virtual void response(AbstractProcessLoop& events_loop)
+    {
+        (*_screen)->unlock_size();
+    }
+
+private:
+    AutoRef<RedScreen> _screen;
+};
+
 class DisplayMarkEvent: public Event {
 public:
     DisplayMarkEvent(int screen_id)
@@ -1088,9 +1105,14 @@ void DisplayChannel::on_disconnect()
     if (screen()) {
         screen()->set_update_interrupt_trigger(NULL);
     }
+
     AutoRef<DetachChannelsEvent> detach_channels(new DetachChannelsEvent(*this));
     get_client().push_event(*detach_channels);
-    detach_from_screen(get_client().get_application());
+    if (screen()) {
+        AutoRef<UnlockScreenEvent> unlock_event(new UnlockScreenEvent(screen()));
+        get_client().push_event(*unlock_event);
+        detach_from_screen(get_client().get_application());
+    }
     get_client().deactivate_interval_timer(*_streams_timer);
     AutoRef<SyncEvent> sync_event(new SyncEvent());
     get_client().push_event(*sync_event);
@@ -1280,7 +1302,12 @@ void DisplayChannel::handle_reset(RedPeer::InMessage *message)
     if (_canvas.get()) {
         _canvas->clear();
     }
+
     AutoRef<ResetTimer> reset_timer(new ResetTimer(screen()->ref(), get_client()));
+
+    AutoRef<UnlockScreenEvent> unlock_event(new UnlockScreenEvent(screen()));
+    get_client().push_event(*unlock_event);
+
     detach_from_screen(get_client().get_application());
     _palette_cache.clear();