[PyKDE] a few issues

[Phil Thompson]

On Friday 29 July 2005 6:16 am, Gerard Vermeulen wrote:
> (1) (public) member data of class Foo does not show up in dir(Foo).
>     This trips up tools like PyChecker and the standard library module
>     inspect.py

Works for me. Do you have an example .sip file in case I'm misunderstanding 
what you mean?

> (2) documentation bug: this concerns virtual member functions which
>     have different C++ signatures in the inheritance tree of a class.
>     Since I have reinvented something along the lines of the following
>     hopefully self-explanatory example, I think it is good to document it:
>
> #!/usr/bin/env python
>
> import sys
> from qt import *
>
> class ScrollView(QScrollView):
>
>     def __init__(self):
>         QScrollView.__init__(self)
>         self.resize(200, 200)
>         self.resizeContents(10000, 10000)
>         self.enableClipper(True)
>         self.viewport().setBackgroundMode(QWidget.NoBackground)
>
>         self.browser = QTextBrowser(self)
>         self.browser.setText("""
> Since the virtual C++ member function drawContents() is
> overloaded in the inheritance tree of QScrollView, it may
> be called as:
>
> 1. QFrame.drawContents(painter)
> 2. QScrollView.drawContents(painter, cx, cy, cw, ch)
>
> Therefore, the Python reimplementation of drawContents()
> must be able to handle 2 and 6 arguments.
> """)
>
>         self.addChild(self.browser, 100, 100)
>         self.browser.resize(500, 300)
>         self.browser.show()
>
>     # __init__()
>
>     # Since the virtual C++ member function drawContents() is overloaded
>     # in the inheritance tree of QScrollView, it may be called as:
>     # 1. QFrame.drawContents(painter)
>     # 2. QScrollView.drawContents(painter, cx, cy, cw, ch)
>     # Therefore, the Python reimplementation of drawContents() must be
>     # able to handle 2 and 6 arguments.
>     def drawContents(self, *args):
>         if len(args) == 5:
>             painter, cx, cy, cw, ch = args
>             painter.fillRect(cx, cy, cw, ch, QBrush(QColor(40, 80, 0)))
>         self.browser.repaint()
>
>     # drawContents()
>
> def main():
>     app = QApplication(sys.argv)
>     demo = ScrollView()
>     app.setMainWidget(demo)
>     demo.show()
>     app.exec_loop()
>
> # main()
>
>
> if __name__ == '__main__':
>     main()
>
> # Local Variables: ***
> # mode: python ***
> # End: ***
>
>     Feel free to add this to the PyQt examples.

I don't see it as a documentation bug - it's a natural consequence of not 
being able to overload Python functions. A Wiki entry would be useful.

> (3) If I feed SIP a class with a protected nested class containing public
>     data members, the code which tries to access the data members of the
>     protected nested class does not compile (not urgent, but I prefer to
>     see SIP complain instead of the compiler).

Added to the TODO list.

Phil