author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 18 Aug 2010 09:37:05 +0300 | |
changeset 10 | 232fbd5a2dcb |
parent 6 | 1c3b8676e58c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation, version 2.1 of the License. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with this program. If not, |
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* see "http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html/". |
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* |
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* Description: |
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* |
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*/ |
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|
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#include "WebContentAnimationItem.h" |
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#include <QGraphicsWebView> |
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#include <QtGlobal> |
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#include <QWebElement> |
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#include <QWebFrame> |
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static const int MinDoubleClickZoomTargetWidth = 100; //Target block width for applying double tap zoom |
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static const int ZoomCommitDuration = 50; //Timeout before commiting zoom |
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static const qreal ZoomableContentMinWidth = 300.; |
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namespace GVA { |
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WebContentAnimationItem::WebContentAnimationItem(QGraphicsWidget* parent, Qt::WindowFlags wFlags) |
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: QGraphicsWidget(parent, wFlags) |
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, m_zoomCommitTimer(this) |
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, m_viewportMetaData(0) |
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{ |
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setFlag(QGraphicsItem::ItemHasNoContents, true); |
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setFlag(QGraphicsItem::ItemClipsChildrenToShape, true); |
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setFlag(QGraphicsItem::ItemClipsToShape, true); |
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setFiltersChildEvents(true); |
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connect(&m_zoomCommitTimer, SIGNAL(timeout()), this, SLOT(commitZoom())); |
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m_zoomCommitTimer.setSingleShot(true); |
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} |
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WebContentAnimationItem::~WebContentAnimationItem() |
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{} |
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void WebContentAnimationItem::setWebView(QGraphicsWebView* webView) |
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{ |
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Q_ASSERT(m_webView); |
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m_webView = webView; |
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|
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//Enabling resize to contents avoids scrollbars in mainframe |
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m_webView->setResizesToContents(true); |
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m_webView->setParentItem(this); |
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m_webView->setAttribute(Qt::WA_OpaquePaintEvent, true); |
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} |
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void WebContentAnimationItem::updatePreferredContentSize(const QSize& size) |
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{ |
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// FIXME: we have bug in QtWebKit API when tileCacheEnabled is true. |
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// this causes viewport not to reset between the page loads. |
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// Thus, we need to update viewport manually until we have fix for this. |
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m_webView->page()->setPreferredContentsSize(size); |
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resize(contentsSize()); |
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} |
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QSize WebContentAnimationItem::contentsSize() const |
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{ |
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return m_webView->page()->mainFrame()->contentsSize(); |
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} |
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void WebContentAnimationItem::setZoomScale(qreal value, bool immediateCommit) |
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{ |
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value = qBound(m_viewportMetaData->m_minimumScale, value, m_viewportMetaData->m_maximumScale); |
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qreal curZoomScale = zoomScale(); |
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if (qFuzzyCompare(value, curZoomScale)) { |
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notifyZoomActions(curZoomScale); |
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return; |
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} |
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|
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if (!immediateCommit) |
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disableContentUpdates(); |
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m_webView->setScale(value); |
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if (immediateCommit) |
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commitZoom(); |
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else |
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m_zoomCommitTimer.start(ZoomCommitDuration); |
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} |
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qreal WebContentAnimationItem::zoomScale() const |
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{ |
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102 |
if (!m_webView) |
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return 1.; |
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104 |
|
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105 |
return m_webView->scale(); |
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106 |
} |
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107 |
|
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108 |
QRectF WebContentAnimationItem::findZoomableRectForPoint(const QPointF& point) |
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109 |
{ |
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QPointF zoomPoint = m_webView->mapFromParent(point); |
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111 |
|
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QWebHitTestResult hitResult = m_webView->page()->mainFrame()->hitTestContent(zoomPoint.toPoint()); |
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QWebElement targetElement = hitResult.enclosingBlockElement(); |
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114 |
|
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while (!targetElement.isNull() && targetElement.geometry().width() < MinDoubleClickZoomTargetWidth) |
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targetElement = targetElement.parent(); |
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117 |
|
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if (!targetElement.isNull()) { |
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QRectF elementRect = targetElement.geometry(); |
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qreal overMinWidth = elementRect.width() - ZoomableContentMinWidth; |
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if (overMinWidth < 0) |
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elementRect.adjust(overMinWidth / 2, 0, -overMinWidth / 2, 0); |
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zoomPoint.setX(elementRect.x()); |
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QRectF resultRect(zoomPoint, elementRect.size()); |
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return QRectF(m_webView->mapToParent(resultRect.topLeft()), |
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m_webView->mapToParent(resultRect.bottomRight())); |
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} |
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return QRectF(); |
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} |
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130 |
|
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void WebContentAnimationItem::disableContentUpdates() |
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132 |
{ |
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133 |
//Disable tiling updates |
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m_webView->setTiledBackingStoreFrozen(true); |
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135 |
} |
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136 |
|
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void WebContentAnimationItem::enableContentUpdates() |
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138 |
{ |
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//Enable tiling updates |
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m_webView->setTiledBackingStoreFrozen(false); |
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141 |
} |
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142 |
|
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void WebContentAnimationItem::commitZoom() |
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144 |
{ |
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m_zoomCommitTimer.stop(); |
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notifyZoomActions(zoomScale()); |
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enableContentUpdates(); |
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148 |
} |
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149 |
|
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void WebContentAnimationItem::resizeEvent(QGraphicsSceneResizeEvent* event) |
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151 |
{ |
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QGraphicsWidget::resizeEvent(event); |
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setZoomScale(size().width() / contentsSize().width()); |
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} |
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155 |
|
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void WebContentAnimationItem::notifyZoomActions(qreal newScale) |
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157 |
{ |
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bool enableZoomIn = false; |
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bool enableZoomOut = false; |
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160 |
|
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if (m_viewportMetaData->m_userScalable) { |
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162 |
|
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if (newScale > m_viewportMetaData->m_minimumScale) |
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enableZoomOut = true; |
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165 |
else |
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166 |
enableZoomOut = false; |
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|
167 |
|
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if (newScale < m_viewportMetaData->m_maximumScale) |
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enableZoomIn = true; |
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170 |
else |
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enableZoomIn = false; |
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172 |
} |
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|
173 |
|
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Revision: 201026
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emit updateZoomActions(enableZoomIn, enableZoomOut); |
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Revision: 201026
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175 |
} |
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Revision: 201026
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|
176 |
|
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Revision: 201026
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177 |
} //namespace GVA |