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/****************************************************************************
**
** Copyright (C) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Script Generator project on Qt Labs.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
function tr(s) { return s; }
function ImageComposer(parent)
{
QWidget.call(this, parent);
this.sourceButton = new QToolButton();
this.sourceButton.setIconSize(ImageComposer.resultSize);
this.operatorComboBox = new QComboBox();
this.addOp(QPainter.CompositionMode_SourceOver, tr("SourceOver"));
this.addOp(QPainter.CompositionMode_DestinationOver, tr("DestinationOver"));
this.addOp(QPainter.CompositionMode_Clear, tr("Clear"));
this.addOp(QPainter.CompositionMode_Source, tr("Source"));
this.addOp(QPainter.CompositionMode_Destination, tr("Destination"));
this.addOp(QPainter.CompositionMode_SourceIn, tr("SourceIn"));
this.addOp(QPainter.CompositionMode_DestinationIn, tr("DestinationIn"));
this.addOp(QPainter.CompositionMode_SourceOut, tr("SourceOut"));
this.addOp(QPainter.CompositionMode_DestinationOut, tr("DestinationOut"));
this.addOp(QPainter.CompositionMode_SourceAtop, tr("SourceAtop"));
this.addOp(QPainter.CompositionMode_DestinationAtop, tr("DestinationAtop"));
this.addOp(QPainter.CompositionMode_Xor, tr("Xor"));
this.destinationButton = new QToolButton();
this.destinationButton.setIconSize(ImageComposer.resultSize);
this.equalLabel = new QLabel(tr("="));
this.resultLabel = new QLabel();
this.resultLabel.minimumWidth = ImageComposer.resultSize.width();
this.sourceButton["clicked()"].connect(this, this.chooseSource);
this.operatorComboBox["activated(int)"].connect(
this, this.recalculateResult);
this.destinationButton["clicked()"].connect(
this, this.chooseDestination);
var mainLayout = new QGridLayout();
mainLayout.addWidget(this.sourceButton, 0, 0, 3, 1);
mainLayout.addWidget(this.operatorComboBox, 1, 1);
mainLayout.addWidget(this.destinationButton, 0, 2, 3, 1);
mainLayout.addWidget(this.equalLabel, 1, 3);
mainLayout.addWidget(this.resultLabel, 0, 4, 3, 1);
mainLayout.sizeConstraint = QLayout.SetFixedSize;
this.setLayout(mainLayout);
this.sourceImage = new QImage();
this.destinationImage = new QImage();
this.resultImage = new QImage(ImageComposer.resultSize, QImage.Format_ARGB32_Premultiplied);
this.loadImage("images/butterfly.png", "sourceImage", this.sourceButton);
this.loadImage("images/checker.png", "destinationImage", this.destinationButton);
this.windowTitle = tr("Image Composition");
}
ImageComposer.resultSize = new QSize(200, 200);
ImageComposer.prototype = new QWidget();
ImageComposer.prototype.chooseSource = function()
{
this.chooseImage(tr("Choose Source Image"), "sourceImage", this.sourceButton);
}
ImageComposer.prototype.chooseDestination = function()
{
this.chooseImage(tr("Choose Destination Image"), "destinationImage", this.destinationButton);
}
ImageComposer.prototype.recalculateResult = function()
{
var mode = this.currentMode();
var painter = new QPainter(this.resultImage);
painter.setCompositionMode(QPainter.CompositionMode_Source);
painter.fillRect(this.resultImage.rect(), new QBrush(new QColor(Qt.transparent)));
painter.setCompositionMode(QPainter.CompositionMode_SourceOver);
painter.drawImage(0, 0, this.destinationImage);
painter.setCompositionMode(mode);
painter.drawImage(0, 0, this.sourceImage);
painter.setCompositionMode(QPainter.CompositionMode_DestinationOver);
painter.fillRect(this.resultImage.rect(), new QBrush(new QColor(Qt.white)));
painter.end();
this.resultLabel.setPixmap(QPixmap.fromImage(this.resultImage));
}
ImageComposer.prototype.addOp = function(mode, name)
{
this.operatorComboBox.addItem(name, mode);
}
ImageComposer.prototype.chooseImage = function(title, property, button)
{
var fileName = QFileDialog.getOpenFileName(this, title);
if (!fileName.isEmpty())
loadImage(fileName, property, button);
}
ImageComposer.prototype.loadImage = function(fileName, property, button)
{
var image = new QImage(fileName);
var fixedImage = new QImage(ImageComposer.resultSize, QImage.Format_ARGB32_Premultiplied);
var painter = new QPainter(fixedImage);
painter.setCompositionMode(QPainter.CompositionMode_Source);
painter.fillRect(fixedImage.rect(), new QBrush(new QColor(Qt.transparent)));
painter.setCompositionMode(QPainter.CompositionMode_SourceOver);
painter.drawImage(this.imagePos(image), image);
painter.end();
button.icon = new QIcon(QPixmap.fromImage(fixedImage));
this[property] = fixedImage;
this.recalculateResult();
}
ImageComposer.prototype.currentMode = function()
{
return this.operatorComboBox.itemData(this.operatorComboBox.currentIndex);
}
ImageComposer.prototype.imagePos = function(image)
{
return new QPoint((ImageComposer.resultSize.width() - image.width()) / 2,
(ImageComposer.resultSize.height() - image.height()) / 2);
}
var composer = new ImageComposer();
composer.show();
QCoreApplication.exec();
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