QmlProfiler: optimizations in canvas repaint

Change-Id: I866f8941129c5a42256f40dca4e4c4fe15b5a760 Reviewed-by: Kai Koehne <kai.koehne@nokia.com>
2011-10-28 16:22:45 +02:00
parent 058878a6c6
commit 70b01ced49
12 changed files with 208 additions and 344 deletions
--- a/src/plugins/qmlprofiler/canvas/qmlprofilercanvas.cpp
+++ b/src/plugins/qmlprofiler/canvas/qmlprofilercanvas.cpp
@@ -0,0 +1,93 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (info@qt.nokia.com)
+**
+**
+** GNU Lesser General Public License Usage
+**
+** This file may be used 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.
+** Please review the following information to ensure the GNU Lesser General
+** Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** Other Usage
+**
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at info@qt.nokia.com.
+**
+**************************************************************************/
+
+#include "qmlprofilercanvas.h"
+
+#include "qdeclarativecontext2d_p.h"
+
+#include <QtGui/qpixmap.h>
+#include <QtGui/qpainter.h>
+
+namespace QmlProfiler {
+namespace Internal {
+
+QmlProfilerCanvas::QmlProfilerCanvas()
+    : m_context2d(new Context2D(this))
+{
+    setFlag(QGraphicsItem::ItemHasNoContents, false);
+    setAcceptedMouseButtons(Qt::LeftButton);
+    setCacheMode(QGraphicsItem::DeviceCoordinateCache);
+}
+
+void QmlProfilerCanvas::requestPaint()
+{
+    update();
+}
+
+void QmlProfilerCanvas::requestRedraw()
+{
+    setDirty(true);
+    update();
+}
+
+void QmlProfilerCanvas::paint(QPainter *p, const QStyleOptionGraphicsItem *, QWidget *)
+{
+    if (m_context2d->size().width() != width() || m_context2d->size().height() != height()) {
+        m_dirty = true;
+        m_context2d->setSize(width(), height());
+    }
+
+    if (m_dirty) {
+        m_context2d->reset();
+
+        emit drawRegion(m_context2d, QRect(0, 0, width(), height()));
+        setDirty(false);
+    }
+
+    p->drawPixmap(0, 0, m_context2d->pixmap());
+}
+
+void QmlProfilerCanvas::componentComplete()
+{
+    const QMetaObject *metaObject = this->metaObject();
+    int propertyCount = metaObject->propertyCount();
+    int requestPaintMethod = metaObject->indexOfMethod("requestPaint()");
+    for (int ii = QmlProfilerCanvas::staticMetaObject.propertyCount(); ii < propertyCount; ++ii) {
+        QMetaProperty p = metaObject->property(ii);
+        if (p.hasNotifySignal())
+            QMetaObject::connect(this, p.notifySignalIndex(), this, requestPaintMethod, 0, 0);
+    }
+    QDeclarativeItem::componentComplete();
+}
+
+}
+}