ImageComposer Class Reference

#include <imagecomposer.h>

Inheritance diagram for ImageComposer:

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Collaboration diagram for ImageComposer:

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List of all members.

Detailed Description

Definition at line 34 of file imagecomposer.h.

Public Member Functions

 ImageComposer ()

Private Slots

void chooseSource ()
void chooseDestination ()
void recalculateResult ()

Private Member Functions

void addOp (QPainter::CompositionMode mode, const QString &name)
void chooseImage (const QString &title, QImage *image, QToolButton *button)
void loadImage (const QString &fileName, QImage *image, QToolButton *button)
QPainter::CompositionMode currentMode () const
QPoint imagePos (const QImage &image) const

Private Attributes

QToolButton * sourceButton
QToolButton * destinationButton
QComboBox * operatorComboBox
QLabel * equalLabel
QLabel * resultLabel
QImage sourceImage
QImage destinationImage
QImage resultImage

Constructor & Destructor Documentation

ImageComposer::ImageComposer (  ) 

Definition at line 30 of file imagecomposer.cpp.

References addOp(), QGridLayout::addWidget(), chooseDestination(), chooseSource(), QPainter::CompositionMode_Clear, QPainter::CompositionMode_Destination, QPainter::CompositionMode_DestinationAtop, QPainter::CompositionMode_DestinationIn, QPainter::CompositionMode_DestinationOut, QPainter::CompositionMode_DestinationOver, QPainter::CompositionMode_Source, QPainter::CompositionMode_SourceAtop, QPainter::CompositionMode_SourceIn, QPainter::CompositionMode_SourceOut, QPainter::CompositionMode_SourceOver, QPainter::CompositionMode_Xor, QObject::connect(), destinationButton, destinationImage, equalLabel, QImage::Format_ARGB32_Premultiplied, loadImage(), operatorComboBox, recalculateResult(), resultImage, resultLabel, resultSize, QLayout::SetFixedSize, QAbstractButton::setIconSize(), QWidget::setLayout(), QWidget::setMinimumWidth(), QLayout::setSizeConstraint(), QWidget::setWindowTitle(), SIGNAL, SLOT, sourceButton, sourceImage, and QSize::width().

00031 {
00032     sourceButton = new QToolButton;
00033     sourceButton->setIconSize(resultSize);
00034 
00035     operatorComboBox = new QComboBox;
00036     addOp(QPainter::CompositionMode_SourceOver, tr("SourceOver"));
00037     addOp(QPainter::CompositionMode_DestinationOver, tr("DestinationOver"));
00038     addOp(QPainter::CompositionMode_Clear, tr("Clear"));
00039     addOp(QPainter::CompositionMode_Source, tr("Source"));
00040     addOp(QPainter::CompositionMode_Destination, tr("Destination"));
00041     addOp(QPainter::CompositionMode_SourceIn, tr("SourceIn"));
00042     addOp(QPainter::CompositionMode_DestinationIn, tr("DestinationIn"));
00043     addOp(QPainter::CompositionMode_SourceOut, tr("SourceOut"));
00044     addOp(QPainter::CompositionMode_DestinationOut, tr("DestinationOut"));
00045     addOp(QPainter::CompositionMode_SourceAtop, tr("SourceAtop"));
00046     addOp(QPainter::CompositionMode_DestinationAtop, tr("DestinationAtop"));
00047     addOp(QPainter::CompositionMode_Xor, tr("Xor"));
00048 
00049     destinationButton = new QToolButton;
00050     destinationButton->setIconSize(resultSize);
00051 
00052     equalLabel = new QLabel(tr("="));
00053 
00054     resultLabel = new QLabel;
00055     resultLabel->setMinimumWidth(resultSize.width());
00056 
00057     connect(sourceButton, SIGNAL(clicked()), this, SLOT(chooseSource()));
00058     connect(operatorComboBox, SIGNAL(activated(int)),
00059             this, SLOT(recalculateResult()));
00060     connect(destinationButton, SIGNAL(clicked()),
00061             this, SLOT(chooseDestination()));
00062 
00063     QGridLayout *mainLayout = new QGridLayout;
00064     mainLayout->addWidget(sourceButton, 0, 0, 3, 1);
00065     mainLayout->addWidget(operatorComboBox, 1, 1);
00066     mainLayout->addWidget(destinationButton, 0, 2, 3, 1);
00067     mainLayout->addWidget(equalLabel, 1, 3);
00068     mainLayout->addWidget(resultLabel, 0, 4, 3, 1);
00069     mainLayout->setSizeConstraint(QLayout::SetFixedSize);
00070     setLayout(mainLayout);
00071 
00072     resultImage = QImage(resultSize, QImage::Format_ARGB32_Premultiplied);
00073 
00074     loadImage(":/images/butterfly.png", &sourceImage, sourceButton);
00075     loadImage(":/images/checker.png", &destinationImage, destinationButton);
00076 
00077     setWindowTitle(tr("Image Composition"));
00078 }

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Member Function Documentation

void ImageComposer::chooseSource (  )  [private, slot]

Definition at line 80 of file imagecomposer.cpp.

References chooseImage(), sourceButton, and sourceImage.

Referenced by ImageComposer().

00081 {
00082     chooseImage(tr("Choose Source Image"), &sourceImage, sourceButton);
00083 }

void ImageComposer::chooseDestination (  )  [private, slot]

Definition at line 85 of file imagecomposer.cpp.

References chooseImage(), destinationButton, and destinationImage.

Referenced by ImageComposer().

00086 {
00087     chooseImage(tr("Choose Destination Image"), &destinationImage,
00088                 destinationButton);
00089 }

void ImageComposer::recalculateResult (  )  [private, slot]

Definition at line 91 of file imagecomposer.cpp.

References QPainter::CompositionMode_DestinationOver, QPainter::CompositionMode_Source, QPainter::CompositionMode_SourceOver, currentMode(), destinationImage, QPainter::drawImage(), QPainter::end(), QPainter::fillRect(), QPixmap::fromImage(), QImage::rect(), resultImage, resultLabel, QPainter::setCompositionMode(), QLabel::setPixmap(), sourceImage, Qt::transparent, and Qt::white.

Referenced by ImageComposer(), and loadImage().

00092 {
00093     QPainter::CompositionMode mode = currentMode();
00094 
00095     QPainter painter(&resultImage);
00096     painter.setCompositionMode(QPainter::CompositionMode_Source);
00097     painter.fillRect(resultImage.rect(), Qt::transparent);
00098     painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
00099     painter.drawImage(0, 0, destinationImage);
00100     painter.setCompositionMode(mode);
00101     painter.drawImage(0, 0, sourceImage);
00102     painter.setCompositionMode(QPainter::CompositionMode_DestinationOver);
00103     painter.fillRect(resultImage.rect(), Qt::white);
00104     painter.end();
00105 
00106     resultLabel->setPixmap(QPixmap::fromImage(resultImage));
00107 }

void ImageComposer::addOp ( QPainter::CompositionMode  mode,
const QString &  name 
) [private]

Definition at line 109 of file imagecomposer.cpp.

References name.

Referenced by ImageComposer().

00110 {
00111     operatorComboBox->addItem(name, mode);
00112 }

void ImageComposer::chooseImage ( const QString &  title,
QImage *  image,
QToolButton *  button 
) [private]

Definition at line 114 of file imagecomposer.cpp.

References QFileDialog::getOpenFileName(), image, QString::isEmpty(), and loadImage().

Referenced by chooseDestination(), and chooseSource().

00116 {
00117     QString fileName = QFileDialog::getOpenFileName(this, title);
00118     if (!fileName.isEmpty())
00119         loadImage(fileName, image, button);
00120 }

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void ImageComposer::loadImage ( const QString &  fileName,
QImage *  image,
QToolButton *  button 
) [private]

Definition at line 122 of file imagecomposer.cpp.

References QPainter::CompositionMode_Source, QPainter::CompositionMode_SourceOver, QPainter::drawImage(), QPainter::end(), QPainter::fillRect(), QImage::Format_ARGB32_Premultiplied, QPixmap::fromImage(), image, imagePos(), recalculateResult(), QImage::rect(), resultSize, QPainter::setCompositionMode(), QAbstractButton::setIcon(), and Qt::transparent.

Referenced by chooseImage(), and ImageComposer().

00124 {
00125     image->load(fileName);
00126 
00127     QImage fixedImage(resultSize, QImage::Format_ARGB32_Premultiplied);
00128     QPainter painter(&fixedImage);
00129     painter.setCompositionMode(QPainter::CompositionMode_Source);
00130     painter.fillRect(fixedImage.rect(), Qt::transparent);
00131     painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
00132     painter.drawImage(imagePos(*image), *image);
00133     painter.end();
00134     button->setIcon(QPixmap::fromImage(fixedImage));
00135 
00136     *image = fixedImage;
00137 
00138     recalculateResult();
00139 }

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QPainter::CompositionMode ImageComposer::currentMode (  )  const [private]

Definition at line 141 of file imagecomposer.cpp.

References QComboBox::currentIndex(), and operatorComboBox.

Referenced by recalculateResult().

00142 {
00143     return (QPainter::CompositionMode)
00144            operatorComboBox->itemData(operatorComboBox->currentIndex()).toInt();
00145 }

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QPoint ImageComposer::imagePos ( const QImage &  image  )  const [private]

Definition at line 147 of file imagecomposer.cpp.

References QSize::height(), image, resultSize, and QSize::width().

Referenced by loadImage().

00148 {
00149     return QPoint((resultSize.width() - image.width()) / 2,
00150                   (resultSize.height() - image.height()) / 2);
00151 }

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Member Data Documentation

QToolButton* ImageComposer::sourceButton [private]

Definition at line 53 of file imagecomposer.h.

Referenced by chooseSource(), and ImageComposer().

QToolButton* ImageComposer::destinationButton [private]

Definition at line 54 of file imagecomposer.h.

Referenced by chooseDestination(), and ImageComposer().

QComboBox* ImageComposer::operatorComboBox [private]

Definition at line 55 of file imagecomposer.h.

Referenced by currentMode(), and ImageComposer().

QLabel* ImageComposer::equalLabel [private]

Definition at line 56 of file imagecomposer.h.

Referenced by ImageComposer().

QLabel* ImageComposer::resultLabel [private]

Definition at line 57 of file imagecomposer.h.

Referenced by ImageComposer(), and recalculateResult().

QImage ImageComposer::sourceImage [private]

Definition at line 59 of file imagecomposer.h.

Referenced by chooseSource(), ImageComposer(), and recalculateResult().

QImage ImageComposer::destinationImage [private]

Definition at line 60 of file imagecomposer.h.

Referenced by chooseDestination(), ImageComposer(), and recalculateResult().

QImage ImageComposer::resultImage [private]

Definition at line 61 of file imagecomposer.h.

Referenced by ImageComposer(), and recalculateResult().

The documentation for this class was generated from the following files:
Generated on Thu Mar 15 15:04:54 2007 for Qt 4.2 User's Guide by  doxygen 1.5.1