Mads Ipsen schrieb:
--------- Original Besked --------
Fra: Markus Feldmann <feldmann_mar...@gmx.de>
Til: pyqt@riverbankcomputing.com <pyqt@riverbankcomputing.com>
Emne: [PyQt] Re: how to show interactive Picture
Dato: 09/02/09 23:58
Mads Ipsen schrieb:
> Could is be that you try to paint before the window is shown? You
need to
> call show() before you can start painting. The following snippet
generates
> an error similar to yours:
Hi,
This is not all of my Code. So there is a <show()> in my main source
code. This Source Code only shows a sub-widget of a MDI Application.
However this window is shown, but without the picture.
How do the program know in which widget shall the Pixmap
be shown ?
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Thats something you tell the program. You reimplement the method
'paintEvent' for a widget class like in the example I posted. Then for a
particular instance of the widget, the window is painted everytime a
paintEvent occurs and the widget get painted. A paintEvent event occurs eg.
when a window is hidden underneath another window and then shown.
To a draw a pixmap onto a widget do something like this in the paintEvent
method:
def paintEvent(self, event):
painter = QtGui.QPainter(64,64)
pixmap = QtGui.QPixmap()
painter.begin(self)
painter.drawPixmap(0,0,pixmap)
painter.end()
Mads
I think my Problem is that i have to send an envent?
As you wrote i changed some of my code. I parted my
scrollarea, where i want to paint my picture, and my
mainwindow, which is a MDI Sub-Widget. The scrollarea
will be centered into the MDI Sub-Widget.
class ScrollArea(QScrollArea):
def __init__(self, parent=None):
QScrollArea.__init__(self, parent)
self.pen = QPen()
self.brush = QBrush()
self.pixmap = QPixmap()
self.pixmap.load(":/../media/images/aventurien.jpg")
def paintEvent(self, event):
painter = QPainter()
painter.begin(self)
painter.setPen(self.pen)
painter.setBrush(self.brush)
painter.save()
painter.drawPixmap(0, 0, self.pixmap)
painter.restore()
painter.end()
class ReiseHelfer(QMainWindow):
def __init__(self, parent=None):
QMainWindow.__init__(self, parent)
self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
self.createActions()
self.createMenus()
self.createStatusBar()
self.setWindowTitle(self.tr("Reisehelfer"))
self.scrollArea = ScrollArea()
self.setCentralWidget(self.scrollArea)
self.readSettings()
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