I am developing an app using PyQt4. And I would like to have an option to print the main widget to a pdf document. I have a custom qlayout for the main widget and I want to create a pdf document with that qlayout. I read a lot about pyqt qprinter, but I'm not sure that's what I want.
Could anyone suggest how I could create a pdf with a qlayout full of qwidgets?
Use QPixmap.grabWidget to render the widget to a pixmap, then paint that on a QPrinter which can then convert it to a pdf:
import sys
from PyQt4 import QtCore, QtGui
class Window(QtGui.QWidget):
def __init__(self):
super(Window, self).__init__()
self.text = QtGui.QTextEdit(self)
self.text.setText(open(__file__).read())
self.edit = QtGui.QLineEdit(self)
self.edit.setText('/tmp/test.pdf')
self.buttonSave = QtGui.QPushButton('Save', self)
self.buttonSave.clicked.connect(self.handleSave)
layout = QtGui.QGridLayout(self)
layout.addWidget(self.text, 0, 0, 1, 2)
layout.addWidget(self.edit, 1, 0, 1, 1)
layout.addWidget(self.buttonSave, 1, 1, 1, 1)
def handleSave(self):
printer = QtGui.QPrinter(QtGui.QPrinter.HighResolution)
printer.setPageSize(QtGui.QPrinter.A6)
printer.setColorMode(QtGui.QPrinter.Color)
printer.setOutputFormat(QtGui.QPrinter.PdfFormat)
printer.setOutputFileName(self.edit.text())
pixmap = QtGui.QPixmap.grabWidget(self).scaled(
printer.pageRect(QtGui.QPrinter.DevicePixel).size().toSize(),
QtCore.Qt.KeepAspectRatio)
painter = QtGui.QPainter(printer)
painter.drawPixmap(0, 0, pixmap)
painter.end()
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
window = Window()
window.setGeometry(600, 100, 640, 640)
window.show()
sys.exit(app.exec_())
EDIT:
If the QPainter part won't work for some reason on your setup, you could try the alternative save method below:
def handleSave(self):
printer = QtGui.QPrinter(QtGui.QPrinter.HighResolution)
printer.setPageSize(QtGui.QPrinter.A9)
printer.setColorMode(QtGui.QPrinter.Color)
printer.setOutputFormat(QtGui.QPrinter.PdfFormat)
printer.setOutputFileName(self.edit.text())
self.render(printer)
Or another alternative would be to use a QTextDocument:
def handleSave(self):
printer = QtGui.QPrinter()
printer.setPageSize(QtGui.QPrinter.A5)
printer.setResolution(200)
printer.setColorMode(QtGui.QPrinter.Color)
printer.setOutputFormat(QtGui.QPrinter.PdfFormat)
printer.setOutputFileName(self.edit.text())
size = printer.pageRect(QtGui.QPrinter.DevicePixel).size()
pixmap = QtGui.QPixmap.grabWidget(self).scaled(
size.toSize(), QtCore.Qt.KeepAspectRatio,
QtCore.Qt.SmoothTransformation)
data = QtCore.QByteArray()
buffer = QtCore.QBuffer(data)
pixmap.save(buffer, 'PNG')
document = QtGui.QTextDocument()
document.setPageSize(size)
document.setHtml('<img src="data:image/png;base64,%s"/>' %
bytes(data.toBase64()).decode('ascii'))
document.print_(printer)
QPainter::end: Painter not active, aborted and QPainter::begin(): Returned false do you know how to fix that?