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 <[email protected]>
Reviewed-by: Jørgen Lind <[email protected]>

1 files changed, 12 insertions, 0 deletions

diff --git a/examples/qpa/windows/main.cpp b/examples/qpa/windows/main.cpp
index 99c24fa0170..e4cd14398c6 100644
--- a/examples/qpa/windows/main.cpp
+++ b/examples/qpa/windows/main.cpp
@@ -1,4 +1,5 @@
 #include <QGuiApplication>
+#include <QScreen>
 
 #include "window.h"
 
@@ -15,5 +16,16 @@ int main(int argc, char **argv)
     Window child(&b);
     child.setVisible(true);
 
+    // create one window on each additional screen as well
+
+    QList<QScreen *> screens = app.screens();
+    foreach (QScreen *screen, screens) {
+        if (screen == app.primaryScreen())
+            continue;
+        Window *window = new Window(screen);
+        window->setVisible(true);
+        window->setWindowTitle(screen->name());
+    }
+
     return app.exec();
 }