QmlProfiler: optimizations in canvas repaint

Change-Id: I866f8941129c5a42256f40dca4e4c4fe15b5a760
Reviewed-by: Kai Koehne <kai.koehne@nokia.com>

src/plugins/qmlprofiler/canvas/canvas.pri

@@ -2,10 +2,10 @@ INCLUDEPATH += $$PWD
 
 HEADERS += $$PWD/qdeclarativecontext2d_p.h \
            $$PWD/qdeclarativecanvas_p.h \
-           $$PWD/qdeclarativetiledcanvas_p.h \
+           $$PWD/qmlprofilercanvas.h \
            $$PWD/qdeclarativecanvastimer_p.h
 
 SOURCES += $$PWD/qdeclarativecontext2d.cpp \
            $$PWD/qdeclarativecanvas.cpp \
-           $$PWD/qdeclarativetiledcanvas.cpp \
+           $$PWD/qmlprofilercanvas.cpp \
            $$PWD/qdeclarativecanvastimer.cpp

src/plugins/qmlprofiler/canvas/qdeclarativetiledcanvas.cpp

@@ -1,163 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
-** All rights reserved.
-** Contact: Nokia Corporation (info@qt.nokia.com)
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** You may use this file under the terms of the BSD license as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
-**     the names of its contributors may be used to endorse or promote
-**     products derived from this software without specific prior written
-**     permission.
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "qdeclarativetiledcanvas_p.h"
-
-#include "qdeclarativecontext2d_p.h"
-
-#include <QtGui/qpixmap.h>
-#include <QtGui/qpainter.h>
-
-TiledCanvas::TiledCanvas()
-: m_context2d(new Context2D(this)), m_canvasSize(-1, -1), m_tileSize(100, 100)
-{
-    setFlag(QGraphicsItem::ItemHasNoContents, false);
-    setAcceptedMouseButtons(Qt::LeftButton);
-    setCacheMode(QGraphicsItem::DeviceCoordinateCache);
-}
-
-QSizeF TiledCanvas::canvasSize() const
-{
-    return m_canvasSize;
-}
-
-void TiledCanvas::setCanvasSize(const QSizeF &v)
-{
-    if (m_canvasSize != v) {
-        m_canvasSize = v;
-        emit canvasSizeChanged();
-        update();
-    }
-}
-
-QSize TiledCanvas::tileSize() const
-{
-    return m_tileSize;
-}
-
-void TiledCanvas::setTileSize(const QSize &v)
-{
-    if (v != m_tileSize) {
-        m_tileSize = v;
-        emit tileSizeChanged();
-        update();
-    }
-}
-
-QRectF TiledCanvas::canvasWindow() const
-{
-    return m_canvasWindow;
-}
-
-void TiledCanvas::setCanvasWindow(const QRectF &v)
-{
-    if (m_canvasWindow != v) {
-        m_canvasWindow = v;
-        emit canvasWindowChanged();
-        update();
-    }
-}
-
-void TiledCanvas::requestPaint()
-{
-    update();
-}
-
-void TiledCanvas::paint(QPainter *p, const QStyleOptionGraphicsItem *, QWidget *)
-{
-    if (m_context2d->size() != m_tileSize)
-        m_context2d->setSize(m_tileSize);
-
-    const int tw = m_tileSize.width();
-    const int th = m_tileSize.height();
-
-    int h1 = m_canvasWindow.left() / tw;
-    int htiles = ((m_canvasWindow.right() - h1 * tw) + tw - 1) / tw;
-
-    int v1 = m_canvasWindow.top() / th;
-    int vtiles = ((m_canvasWindow.bottom() - v1 * th) + th - 1) / th;
-
-    for (int yy = 0; yy < vtiles; ++yy) {
-        for (int xx = 0; xx < htiles; ++xx) {
-            int ht = xx + h1;
-            int vt = yy + v1;
-
-            m_context2d->reset();
-            m_context2d->setPainterTranslate(QPoint(-ht * tw, -vt * th));
-
-            emit drawRegion(m_context2d, QRect(ht * tw, vt * th, tw, th));
-
-            p->drawPixmap(-m_canvasWindow.x() + ht * tw, -m_canvasWindow.y() + vt * th, m_context2d->pixmap());
-        }
-    }
-}
-
-void TiledCanvas::componentComplete()
-{
-    const QMetaObject *metaObject = this->metaObject();
-    int propertyCount = metaObject->propertyCount();
-    int requestPaintMethod = metaObject->indexOfMethod("requestPaint()");
-    for (int ii = TiledCanvas::staticMetaObject.propertyCount(); ii < propertyCount; ++ii) {
-        QMetaProperty p = metaObject->property(ii);
-        if (p.hasNotifySignal())
-            QMetaObject::connect(this, p.notifySignalIndex(), this, requestPaintMethod, 0, 0);
-    }
-    QDeclarativeItem::componentComplete();
-}
-
-
-void TiledCanvas::mousePressEvent(QGraphicsSceneMouseEvent *event)
-{
-    Q_UNUSED(event);
-}
-
-QPixmap TiledCanvas::getTile(int xx, int yy)
-{
-    QPixmap pix(m_tileSize);
-
-    pix.fill(Qt::green);
-
-    QString text = QString::number(xx) + QLatin1Char(' ') + QString::number(yy);
-
-    QPainter p(&pix);
-    p.drawText(pix.rect(), Qt::AlignHCenter | Qt::AlignVCenter, text);
-
-    return pix;
-}
-

src/plugins/qmlprofiler/canvas/qdeclarativetiledcanvas_p.h

@@ -1,123 +0,0 @@
-/**************************************************************************
-**
-** 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.
-**
-**************************************************************************/
-
-#ifndef QDECLARATIVETILEDCANVAS_P_H
-#define QDECLARATIVETILEDCANVAS_P_H
-
-#include <QtDeclarative/qdeclarativeitem.h>
-
-QT_BEGIN_HEADER
-
-QT_BEGIN_NAMESPACE
-
-QT_MODULE(Declarative)
-class Context2D;
-class TiledCanvas : public QDeclarativeItem
-{
-    Q_OBJECT/**************************************************************************
-**
-** 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.
-**
-**************************************************************************/
-
-    Q_PROPERTY(QSizeF canvasSize READ canvasSize WRITE setCanvasSize NOTIFY canvasSizeChanged)
-    Q_PROPERTY(QSize tileSize READ tileSize WRITE setTileSize NOTIFY tileSizeChanged)
-    Q_PROPERTY(QRectF canvasWindow READ canvasWindow WRITE setCanvasWindow NOTIFY canvasWindowChanged)
-
-public:
-    TiledCanvas();
-
-    QSizeF canvasSize() const;
-    void setCanvasSize(const QSizeF &);
-
-    QSize tileSize() const;
-    void setTileSize(const QSize &);
-
-    QRectF canvasWindow() const;
-    void setCanvasWindow(const QRectF &);
-
-Q_SIGNALS:
-    void canvasSizeChanged();
-    void tileSizeChanged();
-    void canvasWindowChanged();
-
-    void drawRegion(Context2D *ctxt, const QRect &region);
-
-public Q_SLOTS:
-    void requestPaint();
-
-protected:
-    virtual void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *);
-    virtual void componentComplete();
-    virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
-
-private:
-    QPixmap getTile(int, int);
-
-    Context2D *m_context2d;
-
-    QSizeF m_canvasSize;
-    QSize m_tileSize;
-    QRectF m_canvasWindow;
-};
-
-QT_END_NAMESPACE
-
-QT_END_HEADER
-
-#endif // QDECLARATIVETILEDCANVAS_P_H

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();
+}
+
+}
+}

src/plugins/qmlprofiler/canvas/qmlprofilercanvas.h

@@ -0,0 +1,83 @@
+/**************************************************************************
+**
+** 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.
+**
+**************************************************************************/
+
+#ifndef QMLPROFILERCANVAS_H
+#define QMLPROFILERCANVAS_H
+
+#include <QtDeclarative/QDeclarativeItem>
+
+class Context2D;
+
+namespace QmlProfiler {
+namespace Internal {
+
+class QmlProfilerCanvas : public QDeclarativeItem
+{
+    Q_OBJECT
+
+    Q_PROPERTY(bool dirty READ dirty WRITE setDirty NOTIFY dirtyChanged)
+
+public:
+    QmlProfilerCanvas();
+
+    bool dirty() const { return m_dirty; }
+    void setDirty(bool dirty)
+    {
+        if (m_dirty != dirty) {
+            m_dirty = dirty;
+            emit dirtyChanged(dirty);
+        }
+    }
+
+signals:
+    void dirtyChanged(bool dirty);
+
+    void drawRegion(Context2D *ctxt, const QRect &region);
+
+public slots:
+    void requestPaint();
+    void requestRedraw();
+
+protected:
+    virtual void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *);
+    virtual void componentComplete();
+
+private:
+    Context2D *m_context2d;
+
+    bool m_dirty;
+};
+
+}
+}
+
+#endif // QMLPROFILERCANVAS_H

src/plugins/qmlprofiler/qml/Label.qml

@@ -46,7 +46,7 @@ Item {
         var rE = labels.rowExpanded;
         rE[typeIndex] = expanded;
         labels.rowExpanded = rE;
-        backgroundMarks.requestPaint();
+        backgroundMarks.requestRedraw();
         view.rowExpanded(typeIndex, expanded);
         updateHeight();
     }

src/plugins/qmlprofiler/qml/Overview.js

@@ -37,12 +37,12 @@ var qmlEventList = 0;
 //draw background of the graph
 function drawGraph(canvas, ctxt, region)
 {
-    var grad = ctxt.createLinearGradient(0, 0, 0, canvas.canvasSize.height);
+    var grad = ctxt.createLinearGradient(0, 0, 0, canvas.height);
     grad.addColorStop(0,   '#fff');
     grad.addColorStop(1, '#ccc');
     ctxt.fillStyle = grad;
 
-    ctxt.fillRect(0, 0, canvas.canvasSize.width, canvas.canvasSize.height);
+    ctxt.fillRect(0, 0, canvas.width, canvas.height);
 }
 
 //draw the actual data to be graphed
@@ -51,7 +51,7 @@ function drawData(canvas, ctxt, region)
     if ((!qmlEventList) || qmlEventList.count() == 0)
         return;
 
-    var width = canvas.canvasSize.width;
+    var width = canvas.width;
     var height = canvas.height;
 
     var sumValue = qmlEventList.traceEndTime() - qmlEventList.traceStartTime();

src/plugins/qmlprofiler/qml/Overview.qml

@@ -34,7 +34,7 @@ import QtQuick 1.0
 import Monitor 1.0
 import "Overview.js" as Plotter
 
-TiledCanvas {
+Canvas2D {
     id: canvas
 
     // ***** properties
@@ -43,20 +43,11 @@ TiledCanvas {
     property variant startTime : 0
     property variant endTime : 0
 
-    canvasSize.width: canvas.width
-    canvasSize.height: canvas.height
-
-    tileSize.width: width
-    tileSize.height: height
-
-    canvasWindow.width: width
-    canvasWindow.height: height
-
     // ***** functions
     function clearDisplay()
     {
         dataAvailable = false;
-        requestPaint();
+        requestRedraw();
     }
 
     function updateRange() {
@@ -89,7 +80,7 @@ TiledCanvas {
         onDataReady: {
             if (qmlEventList.count() > 0) {
                 dataAvailable = true;
-                requestPaint();
+                requestRedraw();
             }
         }
     }

src/plugins/qmlprofiler/qml/TimeDisplay.qml

@@ -33,39 +33,33 @@
 import QtQuick 1.0
 import Monitor 1.0
 
-TiledCanvas {
+Canvas2D {
     id: timeDisplay
 
     property variant startTime : 0
     property variant endTime : 0
     property variant timePerPixel: 0
 
-    canvasSize.width: timeDisplay.width
+
-    canvasSize.height: timeDisplay.height
+    Component.onCompleted: {
-    tileSize.width: width
+        requestRedraw();
-    tileSize.height: height
+    }
-    canvasWindow.width:  width
+    onWidthChanged: {
-    canvasWindow.height: height
+        requestRedraw();
+    }
+    onHeightChanged: {
+        requestRedraw();
+    }
 
     Connections {
         target: zoomControl
         onRangeChanged: {
             startTime = zoomControl.startTime();
             endTime = zoomControl.endTime();
-            requestPaint();
+            requestRedraw();
         }
     }
 
-    Component.onCompleted: {
-        requestPaint();
-    }
-    onWidthChanged: {
-        requestPaint();
-    }
-    onHeightChanged: {
-        requestPaint();
-    }
-
     onDrawRegion: {
         ctxt.fillStyle = "white";
         ctxt.fillRect(0, 0, width, height);
@@ -89,7 +83,7 @@ TiledCanvas {
         ctxt.font = "8px sans-serif";
         for (var ii = 0; ii < blockCount+1; ii++) {
             var x = Math.floor(ii*pixelsPerBlock - realStartPos);
-            ctxt.strokeStyle = "#909090";
+            ctxt.strokeStyle = "#C0C0C0";
             ctxt.beginPath();
             ctxt.moveTo(x, 0);
             ctxt.lineTo(x, height);

src/plugins/qmlprofiler/qml/TimeMarks.qml

@@ -33,30 +33,22 @@
 import QtQuick 1.0
 import Monitor 1.0
 
-TiledCanvas {
+Canvas2D {
     id: timeDisplay
 
     property variant startTime
     property variant endTime
     property variant timePerPixel
 
-    canvasSize.width: timeDisplay.width
-    canvasSize.height: timeDisplay.height
-
-    tileSize.width: width
-    tileSize.height: height
-    canvasWindow.width:  width
-    canvasWindow.height: height
-
     Component.onCompleted: {
-        requestPaint();
+        requestRedraw();
     }
 
     onWidthChanged: {
-        requestPaint();
+        requestRedraw();
     }
     onHeightChanged: {
-        requestPaint();
+        requestRedraw();
     }
 
     onDrawRegion: {
@@ -81,13 +73,13 @@ TiledCanvas {
         ctxt.font = "8px sans-serif";
         for (var ii = 0; ii < blockCount+1; ii++) {
             var x = Math.floor(ii*pixelsPerBlock - realStartPos);
-            ctxt.strokeStyle = "#909090";
+            ctxt.strokeStyle = "#C0C0C0";
             ctxt.beginPath();
             ctxt.moveTo(x, 0);
             ctxt.lineTo(x, height);
             ctxt.stroke();
 
-            ctxt.strokeStyle = "#C0C0C0";
+            ctxt.strokeStyle = "#E0E0E0";
             for (var jj=1; jj < 5; jj++) {
                 var xx = Math.floor(ii*pixelsPerBlock + jj*pixelsPerSection - realStartPos);
                 ctxt.beginPath();
@@ -102,7 +94,7 @@ TiledCanvas {
         if (startTime !== start || endTime !== end) {
             startTime = start;
             endTime = end;
-            requestPaint();
+            requestRedraw();
         }
     }
 

src/plugins/qmlprofiler/qmlprofilerengine.cpp

@@ -32,9 +32,6 @@
 
 #include "qmlprofilerengine.h"
 
-#include "canvas/qdeclarativecanvas_p.h"
-#include "canvas/qdeclarativecontext2d_p.h"
-#include "canvas/qdeclarativetiledcanvas_p.h"
 #include "codaqmlprofilerrunner.h"
 #include "localqmlprofilerrunner.h"
 #include "remotelinuxqmlprofilerrunner.h"

src/plugins/qmlprofiler/qmlprofilertool.cpp

@@ -48,8 +48,8 @@
 #include <analyzerbase/analyzerruncontrol.h>
 
 #include "canvas/qdeclarativecanvas_p.h"
-#include "canvas/qdeclarativecontext2d_p.h"
+#include "canvas/qdeclarativecanvastimer_p.h"
-#include "canvas/qdeclarativetiledcanvas_p.h"
+#include "canvas/qmlprofilercanvas.h"
 
 #include <qmlprojectmanager/qmlprojectrunconfiguration.h>
 #include <utils/fancymainwindow.h>
@@ -139,7 +139,7 @@ QmlProfilerTool::QmlProfilerTool(QObject *parent)
     connect(&d->m_connectionTimer, SIGNAL(timeout()), SLOT(tryToConnect()));
 
     qmlRegisterType<Canvas>("Monitor", 1, 0, "Canvas");
-    qmlRegisterType<TiledCanvas>("Monitor", 1, 0, "TiledCanvas");
+    qmlRegisterType<QmlProfilerCanvas>("Monitor", 1, 0, "Canvas2D");
     qmlRegisterType<Context2D>();
     qmlRegisterType<CanvasImage>();
     qmlRegisterType<CanvasGradient>();