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void Window::loadImage(const QImage &image)
{
QDesktopWidget desktop;
QImage useImage;
QRect space = desktop.availableGeometry();
if ((image.width() > 0.75 * space.width())
|| (image.height() > 0.75*space.height())) {
useImage = image.scaled(0.75*space.width(), 0.75*space.height(),
Qt::KeepAspectRatio, Qt::SmoothTransformation);
} else {
useImage = image;
}
pixmap = QPixmap(useImage.width(), useImage.height());
pixmap.fill(qRgb(255, 255, 255));
label->setPixmap(pixmap);
loadButton->setEnabled(false);
resetButton->setEnabled(true);
thread->processImage(useImage);
}
void Window::addBlock(const Block& block)
{
//get color from block and set the alpha parameter of color.
QColor color = block.color();
color.setAlpha(64);
QPainter painter;
painter.begin(&pixmap);
painter.fillRect(block.rect(), color);
painter.end();
const QPixmap* p1 = label->pixmap();
QPixmap* p2 = &pixmap;
//add pixmap to label widget and to show.
label->setPixmap(pixmap);
}