On Wed, Mar 2, 2011 at 9:26 AM, Martin Teichmann <lkb.teichm...@gmail.com>wrote:
> Hi list,
>
> I'm using matplotlib as a library, in a program using the
> new APIs of PyQt4, which will be the normal APIs for
> Python 3. Unfortunately, the matplotlib Qt4 backend is
> not compatible with this new API.
>
> The problems are easy to fix: first QFileDialog.getSaveFileName
> has changed, and is to be replaced with
> QFileDialog.getSaveFileNameAndFilter, for example with the following
> patch:
>
>
> -----------------------------------------------------------------------------------------------
> --- backend_qt4.py 2011-03-02 16:17:19.526831397 +0100
> +++ backend_qt4_orig.py 2011-03-02 16:16:38.257797767 +0100
> @@ -395,9 +395,8 @@
> filters.append(filter)
> filters = ';;'.join(filters)
>
> - fname, _ = QtGui.QFileDialog.getSaveFileNameAndFilter(
> - self, "Choose a filename to save to", start, filters,
> - selectedFilter)
> + fname = QtGui.QFileDialog.getSaveFileName(
> + self, "Choose a filename to save to", start, filters,
> selectedFilter)
> if fname:
> try:
> self.canvas.print_figure( unicode(fname) )
>
> -----------------------------------------------------------------------------------------------
>
> secondly, QString is used in the new formlayout, wich can be avoided
> using yet another patch, that I actually once filed as Path #3081405
> in the matplotlib patch tracker.
>
>
> -----------------------------------------------------------------------------------------------
> --- formlayout.py 2010-10-05 11:45:01.000000000 +0200
> +++ formlayout.py-orig 2010-10-01 12:28:34.000000000 +0200
> @@ -56,7 +56,8 @@
> QPixmap, QTabWidget, QApplication, QStackedWidget,
> QDateEdit, QDateTimeEdit, QFont, QFontComboBox,
> QFontDatabase, QGridLayout)
> -from PyQt4.QtCore import Qt, SIGNAL, SLOT, QSize, pyqtSignature,
> pyqtProperty
> +from PyQt4.QtCore import (Qt, SIGNAL, SLOT, QSize, QString,
> + pyqtSignature, pyqtProperty)
> from datetime import date
>
>
> @@ -101,7 +102,10 @@
> Avoid warning from Qt when an invalid QColor is instantiated
> """
> color = QColor()
> - text = unicode(text)
> + if isinstance(text, QString):
> + text = str(text)
> + if not isinstance(text, (unicode, str)):
> + return color
> if text.startswith('#') and len(text)==7:
> correct = '#0123456789abcdef'
> for char in text:
>
> -----------------------------------------------------------------------------------------------------------
>
> Greetings
>
> Martin
>
>
Martin,
Thank you for letting us know about continuing issues with PyQT4. First, I
think your patches are "backwards", per se. Can you double-check that they
are what you mean? Also, which version of matplotlib did you patch
against? I know that we recently made a fix involving QString:
https://github.com/matplotlib/matplotlib/commit/fa82c5adcc1493ec705728e4beb806cb4c84579f
I see we probably still need to fix the backend, but is everything else in
order?
Ben Root
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