1 files changed, 110 insertions, 0 deletions
diff --git a/src/mcompositescene.cpp b/src/mcompositescene.cpp
new file mode 100644
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+++ b/src/mcompositescene.cpp
@@ -0,0 +1,110 @@
+/***************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (directui@nokia.com)
+**
+** This file is part of mcompositor.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at directui@nokia.com.
+**
+** This library is free software; you can redistribute it and/or
+** modify it under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation
+** and appearing in the file LICENSE.LGPL included in the packaging
+** of this file.
+**
+****************************************************************************/
+
+#include <QX11Info>
+#include <QKeySequence>
+#include <QKeyEvent>
+#include <QEvent>
+#include <QTimer>
+#include <QApplication>
+#include <QDesktopWidget>
+
+#include "mcompositewindow.h"
+#include "mcompositescene.h"
+
+#include <X11/extensions/Xfixes.h>
+#ifdef HAVE_SHAPECONST
+#include <X11/extensions/shapeconst.h>
+#else
+#include <X11/extensions/shape.h>
+#endif
+#include <X11/extensions/Xcomposite.h>
+
+static int error_handler(Display * , XErrorEvent *error)
+{
+    if (error->resourceid == QX11Info::appRootWindow() && error->error_code == BadAccess) {
+        qCritical("Another window manager is running.");
+        ::exit(0);
+    }
+    if (error->error_code == BadMatch)
+        qDebug() << "Bad match error " << error->resourceid;
+
+    return 0;
+}
+
+MCompositeScene::MCompositeScene(QObject *p)
+    : QGraphicsScene(p)
+{
+    setBackgroundBrush(Qt::NoBrush);
+    setForegroundBrush(Qt::NoBrush);
+    setSceneRect(QRect(0, 0,
+                       QApplication::desktop()->width(),
+                       QApplication::desktop()->height()));
+    installEventFilter(this);
+}
+
+void MCompositeScene::prepareRoot()
+{
+    Display *dpy = QX11Info::display();
+    Window root =  QX11Info::appRootWindow();
+
+    XSetWindowAttributes sattr;
+    sattr.event_mask =  SubstructureRedirectMask | SubstructureNotifyMask | StructureNotifyMask | PropertyChangeMask;
+
+    //XCompositeRedirectSubwindows (dpy, root, CompositeRedirectAutomatic);
+
+    XChangeWindowAttributes(dpy, root, CWEventMask, &sattr);
+    XSelectInput(dpy, root, SubstructureNotifyMask | SubstructureRedirectMask | StructureNotifyMask | PropertyChangeMask);
+    XSetErrorHandler(error_handler);
+}
+
+
+void MCompositeScene::setupOverlay(Window window, const QRect &geom,
+                                     bool restoreInput)
+{
+    Display *dpy = QX11Info::display();
+    XRectangle rect;
+
+    rect.x      = geom.x();
+    rect.y      = geom.y();
+    rect.width  = geom.width();
+    rect.height = geom.height();
+    XserverRegion region = XFixesCreateRegion(dpy, &rect, 1);
+
+    XFixesSetWindowShapeRegion(dpy, window, ShapeBounding, 0, 0, 0);
+    if (!restoreInput)
+        XFixesSetWindowShapeRegion(dpy, window, ShapeInput, 0, 0, region);
+    else
+        XFixesSetWindowShapeRegion(dpy, window, ShapeInput, 0, 0, 0);
+
+    XFixesDestroyRegion(dpy, region);
+}
+
+void MCompositeScene::drawItems(QPainter *painter, int numItems, QGraphicsItem *items[], const QStyleOptionGraphicsItem options[], QWidget *widget)
+{
+    for (int i = 0; i < numItems; ++i) {
+        MCompositeWindow *window = (MCompositeWindow *) items[i];
+        if (window->windowVisible() && !window->isIconified()) {
+            painter->save();
+            painter->setMatrix(items[i]->sceneMatrix(), true);
+            items[i]->paint(painter, &options[i], widget);
+            painter->restore();
+        }
+    }
+}