libdeng2|libdeng: App notifies about mode changes using a signal

When the window manager changes the display mode, de::App will emit a signal notifying about it (after a short delay).
skyjake · Aug 31, 2012 · c549b6b · c549b6b
1 parent 13e1936
commit c549b6b
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Showing 3 changed files with 30 additions and 0 deletions.
diff --git a/doomsday/engine/portable/src/window.cpp b/doomsday/engine/portable/src/window.cpp
@@ -49,6 +49,7 @@
 #include "fs_util.h"
 
 #include <de/c_wrapper.h>
+#include <de/App>
 #include <de/Log>
 #include <QDebug>
 
@@ -76,6 +77,12 @@ static QRect desktopValidRect()
 
 static void updateMainWindowLayout(void);
 
+static void notifyAboutModeChange()
+{
+    LOG_MSG("Display mode has changed.");
+    DENG2_APP->notifyDisplayModeChanged();
+}
+
 struct ddwindow_s
 {
     CanvasWindow* widget;   ///< The widget this window represents.
@@ -219,6 +226,12 @@ struct ddwindow_s
 
         bool modeChanged = applyDisplayMode();
 
+        if(modeChanged)
+        {
+            // Others might be interested to hear about the mode change.
+            LegacyCore_Timer(POST_MODE_CHANGE_WAIT_BEFORE_UPDATE, notifyAboutModeChange);
+        }
+
         if(flags & DDWF_FULLSCREEN)
         {
             LOG_DEBUG("fullscreen mode (mode changed? %b)") << modeChanged;

diff --git a/doomsday/libdeng2/include/de/core/app.h b/doomsday/libdeng2/include/de/core/app.h
@@ -54,9 +54,21 @@ namespace de
          */
         de::String executablePath() const;
 
+        /**
+         * Emits the displayModeChanged() signal.
+         *
+         * @todo In the future when de::App (or a sub-object owned by it) is
+         * responsible for display modes, this should be handled internally and
+         * not via this public interface where anybody can call it.
+         */
+        void notifyDisplayModeChanged();
+
     signals:
         void uncaughtException(QString message);
 
+        /// Emitted when the display mode has changed.
+        void displayModeChanged();
+
     private:
         CommandLine _cmdLine;
 

diff --git a/doomsday/libdeng2/src/core/app.cpp b/doomsday/libdeng2/src/core/app.cpp
@@ -56,3 +56,8 @@ String App::executablePath() const
 {
     return _appPath;
 }
+
+void App::notifyDisplayModeChanged()
+{
+    emit displayModeChanged();
+}