author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 27 May 2010 12:46:08 +0300 | |
changeset 51 | 4785f57bf3d4 |
parent 39 | 4e8ebe173323 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Homescreen wallpaper helper class. |
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* |
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*/ |
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#include <QString> |
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#include <QImageReader> |
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#include "hswallpaperhelper.h" |
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/*! |
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\class HsWallpaperHelper |
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\ingroup group_hsapplication |
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\brief Homescreen wallpaper helper class. |
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Implements image scaling and cropping services. |
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*/ |
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/*! |
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\internal |
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Scales and crops (if needed) \a sourcePath image using \a targetRect. |
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Centers target rect automatically if a\ centerTarget is true. |
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Pass empty a\ sourceRect to use full size source image as starting point. |
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Returns processed image or null image if operation fails. |
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*/ |
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QImage HsWallpaperHelper::processImage(const QString &sourcePath, |
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const QRect &targetRect, |
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const QRect &sourceRect, |
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bool centerTarget) |
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{ |
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QImageReader imageReader(sourcePath); |
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QRect tempTargetRect = targetRect; |
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QRect tempSourceRect = sourceRect; |
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if (imageReader.canRead()) { |
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QSize sourceSize = imageReader.size(); |
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if (tempSourceRect.isEmpty()) { |
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// If sourceRect not defined, uses full size image as source. |
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tempSourceRect.setRect(0, 0, sourceSize.width(), sourceSize.height()); |
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} |
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sourceSize.scale(tempTargetRect.width(), tempTargetRect.height(), |
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Qt::KeepAspectRatioByExpanding); |
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imageReader.setScaledSize(sourceSize); |
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if (centerTarget) { |
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tempTargetRect.moveCenter(QPoint(sourceSize.width() / 2, sourceSize.height() / 2)); |
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} |
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imageReader.setScaledClipRect(tempTargetRect); |
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return imageReader.read(); |
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} |
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return QImage(); // returns null QImage |
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} |