forked from qt-creator/qt-creator
69041fbb5c
In certain conditions the area covered by the canvas can have a negative size. This patch handles that case gracefully. Change-Id: I952edfa5bd0f8b42ce69356106f2e0f326dceeb7 Reviewed-by: Kai Koehne <kai.koehne@digia.com>
99 lines
3.2 KiB
C++
99 lines
3.2 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of Qt Creator.
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**
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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****************************************************************************/
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#include "qmlprofilercanvas.h"
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#include "qdeclarativecontext2d_p.h"
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#include <qpixmap.h>
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#include <qpainter.h>
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namespace QmlProfiler {
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namespace Internal {
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QmlProfilerCanvas::QmlProfilerCanvas()
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: m_context2d(new Context2D(this))
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{
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setAcceptedMouseButtons(Qt::LeftButton);
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m_drawTimer.setSingleShot(true);
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connect(&m_drawTimer, SIGNAL(timeout()), this, SLOT(draw()));
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m_drawTimer.start();
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}
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void QmlProfilerCanvas::requestPaint()
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{
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if (m_context2d->size().width() != width()
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|| m_context2d->size().height() != height()) {
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m_drawTimer.start();
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} else {
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update();
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}
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}
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void QmlProfilerCanvas::requestRedraw()
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{
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m_drawTimer.start();
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}
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// called from GUI thread. Draws into m_context2d.
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void QmlProfilerCanvas::draw()
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{
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QMutexLocker lock(&m_pixmapMutex);
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m_context2d->reset();
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m_context2d->setSize(width(), height());
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if (width() > 0 && height() > 0)
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emit drawRegion(m_context2d, QRect(0, 0, width(), height()));
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update();
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}
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// called from OpenGL thread. Renders m_context2d into OpenGL buffer.
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void QmlProfilerCanvas::paint(QPainter *p)
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{
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QMutexLocker lock(&m_pixmapMutex);
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p->drawPixmap(0, 0, m_context2d->pixmap());
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}
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void QmlProfilerCanvas::componentComplete()
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{
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const QMetaObject *metaObject = this->metaObject();
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int propertyCount = metaObject->propertyCount();
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int requestPaintMethod = metaObject->indexOfMethod("requestPaint()");
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for (int ii = QmlProfilerCanvas::staticMetaObject.propertyCount(); ii < propertyCount; ++ii) {
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QMetaProperty p = metaObject->property(ii);
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if (p.hasNotifySignal())
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QMetaObject::connect(this, p.notifySignalIndex(), this, requestPaintMethod, 0, 0);
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}
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QQuickItem::componentComplete();
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}
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}
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}
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