void ImageToolWidget::filterImage()
{
if (ui.PixmapLabel->pixmap() == 0) {
QMessageBox::information(this, "QImageTool", "Sorry, you must load an image first\n");
} else {
setCursor(Qt::WaitCursor);
QImage imgToFilter = ui.PixmapLabel->pixmap()->toImage();
QtImageFilter *filter = m_imageFilters[ui.FiltersCombo->currentIndex()];
if (filter->name() == "Punch") {
filter->setOption(QtImageFilter::Radius, qMin(imgToFilter.width(), imgToFilter.height())/2);
filter->setOption(QtImageFilter::Center, QPointF(imgToFilter.width()/2.0,imgToFilter.height()/2.0));
filter->setOption(QtImageFilter::Force, 0.5);
} else if (filter->name() == "ConvolutionFilter") {
// A simple mean filter just to demonstrate that we can add our own kernels.
static int kernelElements[9] =
{ 1, 1, 1,
1, 1, 1,
1, 1, 1
};
QtConvolutionKernelMatrix kernel(kernelElements, 3, 3);
QVariant value;
qVariantSetValue<QtConvolutionKernelMatrix>(value, kernel);
filter->setOption(QtImageFilter::ConvolutionKernelMatrix, value);
}
if (filter->supportsOption(MirrorFilter::MirrorHorizontal))
filter->setOption(MirrorFilter::MirrorHorizontal, ui.ckHorizontal->isChecked() );
if (filter->supportsOption(MirrorFilter::MirrorVertical))
filter->setOption(MirrorFilter::MirrorVertical, ui.ckVertical->isChecked());
if (filter->supportsOption(QtImageFilter::FilterChannels)) {
QString rgba = ui.ckRed->isChecked() ? "r" : "";
rgba+= ui.ckGreen->isChecked() ? "g" : "";
rgba+= ui.ckBlue->isChecked() ? "b" : "";
rgba+= ui.ckAlpha->isChecked() ? "a" : "";
filter->setOption(QtImageFilter::FilterChannels, rgba);
}
if (filter->supportsOption(QtImageFilter::FilterBorderPolicy)) {
QString borderPolicy;
if (ui.rbExtend->isChecked()) borderPolicy = "Extend";
else if (ui.rbMirror->isChecked()) borderPolicy = "Mirror";
else borderPolicy = "Wrap";
filter->setOption(QtImageFilter::FilterBorderPolicy, borderPolicy);
}
imgToFilter = filter->apply(imgToFilter);
setCursor(Qt::ArrowCursor);
setPixmapAndResize(QPixmap::fromImage(imgToFilter));
}
}
void ImageToolWidget::filterIndexChanged(int index)
{
if (index == 0 || index >= m_imageFilters.count()) {
ui.FilterButton->setToolTip(QLatin1String("No image filter chosen"));
ui.FilterButton->setEnabled(false);
ui.gbBorderPolicy->setVisible( false );
ui.gbChannels->setVisible( false );
ui.gbMirror->setVisible( false );
} else {
QtImageFilter *filter = m_imageFilters[index];
ui.FilterButton->setToolTip(filter->description());
ui.FilterButton->setEnabled(true);
ui.gbBorderPolicy->setVisible( filter->supportsOption(QtImageFilter::FilterBorderPolicy) );
ui.gbChannels->setVisible( filter->supportsOption(QtImageFilter::FilterChannels) );
ui.gbMirror->setVisible( filter->supportsOption(MirrorFilter::MirrorHorizontal) || filter->supportsOption(MirrorFilter::MirrorVertical) );
}
}