Added workable QScreen API on top of QPlatformScreen.

QPlatformIntegration::screens() no longer has to be implemented,
implementations should call QPlatformIntegration::screenAdded() for each
screen instead. This is for being able to support adding screens at
run-time later on, by connecting it to a signal in QGuiApplication.

The QGuiGLContext API has changed a bit, by not sending in all the
parameters in the constructor but instead having a create() function.
The createPlatformGLContext() factory in QPlatformIntegration takes a
QGuiGLContext * instead of a QSurfaceFormat and a share context, similar
to how the window and backing store factory functions work.

The XCB plugin has experimental support for connecting to multiple X
displays simultaneously, creating one or more QScreen for each.

Change-Id: I248a22a4fd3481280710110272c04a30a8021e8f
Reviewed-on: http://codereview.qt.nokia.com/2103
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Jørgen Lind <jorgen.lind@nokia.com>

1 files changed, 18 insertions, 9 deletions

diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index ad01a72a45..a54dab6398 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -52,6 +52,7 @@
 #include <QtCore/qmutex.h>
 #include <QtDebug>
 #include <qpalette.h>
+#include <qscreen.h>
 
 #include <QtGui/QPlatformIntegration>
 #include <QtGui/QGenericPluginFactory>
@@ -103,6 +104,8 @@ QGuiApplicationPrivate *QGuiApplicationPrivate::self = 0;
 QClipboard *QGuiApplicationPrivate::qt_clipboard = 0;
 #endif
 
+QList<QScreen *> QGuiApplicationPrivate::screen_list;
+
 QWindowList QGuiApplicationPrivate::window_list;
 QWindow *QGuiApplicationPrivate::active_window = 0;
 
@@ -179,21 +182,27 @@ QWindowList QGuiApplication::topLevelWindows()
     return QGuiApplicationPrivate::window_list;
 }
 
-QWindow *QGuiApplication::topLevelAt(const QPoint &pos)
+QScreen *QGuiApplication::primaryScreen()
 {
-    QPlatformIntegration *pi = QGuiApplicationPrivate::platformIntegration();
+    if (QGuiApplicationPrivate::screen_list.isEmpty())
+        return 0;
+    return QGuiApplicationPrivate::screen_list.at(0);
+}
 
-    QList<QPlatformScreen *> screens = pi->screens();
-    QList<QPlatformScreen *>::const_iterator screen = screens.constBegin();
-    QList<QPlatformScreen *>::const_iterator end = screens.constEnd();
+QList<QScreen *> QGuiApplication::screens()
+{
+    return QGuiApplicationPrivate::screen_list;
+}
 
-    // The first screen in a virtual environment should know about all top levels
-    if (pi->isVirtualDesktop())
-        return (*screen)->topLevelAt(pos);
+QWindow *QGuiApplication::topLevelAt(const QPoint &pos)
+{
+    QList<QScreen *> screens = QGuiApplication::screens();
+    QList<QScreen *>::const_iterator screen = screens.constBegin();
+    QList<QScreen *>::const_iterator end = screens.constEnd();
 
     while (screen != end) {
         if ((*screen)->geometry().contains(pos))
-            return (*screen)->topLevelAt(pos);
+            return (*screen)->handle()->topLevelAt(pos);
         ++screen;
     }
     return 0;