window.cpp 范例文件

threads/queuedcustomtype/window.cpp
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#include <QtWidgets> #include "window.h" Window::Window() { thread = new RenderThread(); label = new QLabel(); label->setAlignment(Qt::AlignCenter); loadButton = new QPushButton(tr("&Load image...")); resetButton = new QPushButton(tr("&Stop")); resetButton->setEnabled(false); connect(loadButton, SIGNAL(clicked()), this, SLOT(loadImage())); connect(resetButton, SIGNAL(clicked()), thread, SLOT(stopProcess())); connect(thread, SIGNAL(finished()), this, SLOT(resetUi())); connect(thread, SIGNAL(sendBlock(Block)), this, SLOT(addBlock(Block))); QHBoxLayout *buttonLayout = new QHBoxLayout(); buttonLayout->addStretch(); buttonLayout->addWidget(loadButton); buttonLayout->addWidget(resetButton); buttonLayout->addStretch(); QVBoxLayout *layout = new QVBoxLayout(this); layout->addWidget(label); layout->addLayout(buttonLayout); setWindowTitle(tr("Queued Custom Type")); } void Window::loadImage() { QStringList formats; foreach (QByteArray format, QImageReader::supportedImageFormats()) if (format.toLower() == format) formats.append("*." + format); QString newPath = QFileDialog::getOpenFileName(this, tr("Open Image"), path, tr("Image files (%1)").arg(formats.join(' '))); if (newPath.isEmpty()) return; QImage image(newPath); if (!image.isNull()) { loadImage(image); path = newPath; } } 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) { QColor color = block.color(); color.setAlpha(64); QPainter painter; painter.begin(&pixmap); painter.fillRect(block.rect(), color); painter.end(); label->setPixmap(pixmap); } void Window::resetUi() { loadButton->setEnabled(true); resetButton->setEnabled(false); }