Mega Code Archive
Create screen shot
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#ifndef SCREENSHOT_H
#define SCREENSHOT_H
#include <QPixmap>
#include <QWidget>
QT_BEGIN_NAMESPACE
class QCheckBox;
class QGridLayout;
class QGroupBox;
class QHBoxLayout;
class QLabel;
class QPushButton;
class QSpinBox;
class QVBoxLayout;
QT_END_NAMESPACE
class Screenshot : public QWidget
{
Q_OBJECT
public:
Screenshot();
protected:
void resizeEvent(QResizeEvent *event);
private slots:
void newScreenshot();
void saveScreenshot();
void shootScreen();
void updateCheckBox();
private:
void createOptionsGroupBox();
void createButtonsLayout();
QPushButton *createButton(const QString &text, QWidget *receiver,
const char *member);
void updateScreenshotLabel();
QPixmap originalPixmap;
QLabel *screenshotLabel;
QGroupBox *optionsGroupBox;
QSpinBox *delaySpinBox;
QLabel *delaySpinBoxLabel;
QCheckBox *hideThisWindowCheckBox;
QPushButton *newScreenshotButton;
QPushButton *saveScreenshotButton;
QPushButton *quitScreenshotButton;
QVBoxLayout *mainLayout;
QGridLayout *optionsGroupBoxLayout;
QHBoxLayout *buttonsLayout;
};
#endif
#include <QtGui>
#include "screenshot.h"
Screenshot::Screenshot()
{
screenshotLabel = new QLabel;
screenshotLabel->setSizePolicy(QSizePolicy::Expanding,
QSizePolicy::Expanding);
screenshotLabel->setAlignment(Qt::AlignCenter);
screenshotLabel->setMinimumSize(240, 160);
createOptionsGroupBox();
createButtonsLayout();
mainLayout = new QVBoxLayout;
mainLayout->addWidget(screenshotLabel);
mainLayout->addWidget(optionsGroupBox);
mainLayout->addLayout(buttonsLayout);
setLayout(mainLayout);
shootScreen();
delaySpinBox->setValue(5);
setWindowTitle(tr("Screenshot"));
resize(300, 200);
}
void Screenshot::resizeEvent(QResizeEvent * /* event */)
{
QSize scaledSize = originalPixmap.size();
scaledSize.scale(screenshotLabel->size(), Qt::KeepAspectRatio);
if (!screenshotLabel->pixmap()
|| scaledSize != screenshotLabel->pixmap()->size())
updateScreenshotLabel();
}
void Screenshot::newScreenshot()
{
if (hideThisWindowCheckBox->isChecked())
hide();
newScreenshotButton->setDisabled(true);
QTimer::singleShot(delaySpinBox->value() * 1000, this, SLOT(shootScreen()));
}
void Screenshot::saveScreenshot()
{
QString format = "png";
QString initialPath = QDir::currentPath() + tr("/untitled.") + format;
QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"),
initialPath,
tr("%1 Files (*.%2);;All Files (*)")
.arg(format.toUpper())
.arg(format));
if (!fileName.isEmpty())
originalPixmap.save(fileName, format.toAscii());
}
void Screenshot::shootScreen()
{
if (delaySpinBox->value() != 0)
qApp->beep();
originalPixmap = QPixmap(); // clear image for low memory situations
// on embedded devices.
originalPixmap = QPixmap::grabWindow(QApplication::desktop()->winId());
updateScreenshotLabel();
newScreenshotButton->setDisabled(false);
if (hideThisWindowCheckBox->isChecked())
show();
}
void Screenshot::updateCheckBox()
{
if (delaySpinBox->value() == 0) {
hideThisWindowCheckBox->setDisabled(true);
hideThisWindowCheckBox->setChecked(false);
}
else
hideThisWindowCheckBox->setDisabled(false);
}
void Screenshot::createOptionsGroupBox()
{
optionsGroupBox = new QGroupBox(tr("Options"));
delaySpinBox = new QSpinBox;
delaySpinBox->setSuffix(tr(" s"));
delaySpinBox->setMaximum(60);
connect(delaySpinBox, SIGNAL(valueChanged(int)), this, SLOT(updateCheckBox()));
delaySpinBoxLabel = new QLabel(tr("Screenshot Delay:"));
hideThisWindowCheckBox = new QCheckBox(tr("Hide This Window"));
optionsGroupBoxLayout = new QGridLayout;
optionsGroupBoxLayout->addWidget(delaySpinBoxLabel, 0, 0);
optionsGroupBoxLayout->addWidget(delaySpinBox, 0, 1);
optionsGroupBoxLayout->addWidget(hideThisWindowCheckBox, 1, 0, 1, 2);
optionsGroupBox->setLayout(optionsGroupBoxLayout);
}
void Screenshot::createButtonsLayout()
{
newScreenshotButton = createButton(tr("New Screenshot"),
this, SLOT(newScreenshot()));
saveScreenshotButton = createButton(tr("Save Screenshot"),
this, SLOT(saveScreenshot()));
quitScreenshotButton = createButton(tr("Quit"), this, SLOT(close()));
buttonsLayout = new QHBoxLayout;
buttonsLayout->addStretch();
buttonsLayout->addWidget(newScreenshotButton);
buttonsLayout->addWidget(saveScreenshotButton);
buttonsLayout->addWidget(quitScreenshotButton);
}
QPushButton *Screenshot::createButton(const QString &text, QWidget *receiver,
const char *member)
{
QPushButton *button = new QPushButton(text);
button->connect(button, SIGNAL(clicked()), receiver, member);
return button;
}
void Screenshot::updateScreenshotLabel()
{
screenshotLabel->setPixmap(originalPixmap.scaled(screenshotLabel->size(),
Qt::KeepAspectRatio,
Qt::SmoothTransformation));
}
#include <QApplication>
#include "screenshot.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
Screenshot screenshot;
screenshot.show();
return app.exec();
}
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