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-rw-r--r-- | doc/src/painting-and-printing/printing.qdoc | 11 | ||||
-rw-r--r-- | doc/src/snippets/widgetprinting.cpp | 54 |
2 files changed, 65 insertions, 0 deletions
diff --git a/doc/src/painting-and-printing/printing.qdoc b/doc/src/painting-and-printing/printing.qdoc index 62c8192..97cd92f 100644 --- a/doc/src/painting-and-printing/printing.qdoc +++ b/doc/src/painting-and-printing/printing.qdoc @@ -136,6 +136,17 @@ used is constructed using the form of the constructor that accepts a QPaintDevice argument. + \section1 Printing Widgets + + To print a widget, you can use the QWidget::render() function. As mentioned, + the printer's resolution is usually higher than the screen resolution, so you + will have to scale the painter. You may also want to position the widget on the + page. The following code sample shows how this may look. + + \snippet doc/src/snippets/widgetprinting.cpp 0 + + This will center the widget on the page and scale it so that it fits the page. + \section1 Printing from Complex Widgets Certain widgets, such as QTextEdit and QGraphicsView, display rich content diff --git a/doc/src/snippets/widgetprinting.cpp b/doc/src/snippets/widgetprinting.cpp new file mode 100644 index 0000000..b3d5b7c --- /dev/null +++ b/doc/src/snippets/widgetprinting.cpp @@ -0,0 +1,54 @@ + +#include <QtGui> + +class Window : public QWidget +{ + Q_OBJECT + +public: + Window() { + myWidget = new QPushButton("Print Me"); + connect(myWidget, SIGNAL(clicked()), this, SLOT(print())); + + QVBoxLayout *layout = new QVBoxLayout; + layout->addWidget(myWidget); + setLayout(layout); + } + +private slots: + void print() { + QPrinter printer(QPrinter::HighResolution); + + printer.setOutputFileName("test.pdf"); + +//! [0] + QPainter painter; + painter.begin(&printer); + double xscale = printer.pageRect().width()/double(myWidget->width()); + double yscale = printer.pageRect().height()/double(myWidget->height()); + double scale = qMin(xscale, yscale); + painter.translate(printer.paperRect().x() + printer.pageRect().width()/2, + printer.paperRect().y() + printer.pageRect().height()/2); + painter.scale(scale, scale); + painter.translate(-width()/2, -height()/2); + + myWidget->render(&painter); +//! [0] + } + +private: + QPushButton *myWidget; +}; + +int main(int argv, char **args) +{ + QApplication app(argv, args); + + Window window; + window.show(); + + return app.exec(); +} + +#include "main.moc" + |