Hi Stan,
this size problem sounds somewhat familiar to me. I had a serious
headache to get the interaction of wx.ScrolledWindow, wx.BoxSizer and
matplotlib.backends.backend_wxagg.FigureCanvasWxAgg right when zooming a
canvas in and out and resizing the window.
I am not sure if it will help you, but I've attached how exactly I set
up the three elements to behave as I wish. Unrelated code is stripped
from the example.
Hope that helps!
Dieter
Am Montag, den 15.08.2011, 13:30 -0400 schrieb Stan West:
> From: Stan West [mailto:stan.w...@nrl.navy.mil]
> Sent: Monday, August 15, 2011 13:21
>
> From: David Just [mailto:just.da...@mayo.edu]
> Sent: Friday, August 12, 2011 11:05
>
>
> Now that I’m pre-building all my enlarged interpolated
> images to scroll through, I’m having trouble forcing
> the figure/FigureCanvas to be the size I want.
>
> I’m trying:
> fig.set_size_inches(768 / 72.0, 768 / 72.0), but it
> ends up the same size as the default plot.
>
> If the issue is that the GUI window is not changing size, try
> adding "forward=True" to the set_size_inches call.
>
> Developers:
>
> As I was checking this with v. 1.0.1, I noticed that the Qt4Agg and
> TkAgg backends are inconsistent in how they set the size of a figure.
> Here is the Qt4Agg behavior:
>
> >>> fig = plt.figure(figsize=[6, 4])
> >>> print fig.get_size_inches()
> [ 6. 3.97916667]
> >>> fig.set_size_inches([6, 4], forward=True)
> >>> print fig.get_size_inches()
> [ 6. 3.4375]
>
> The initial figure size isn't quite right, and the size after
> set_size_inches is worse. (Is the resize ignoring the toolbar height?)
> Here is the TkAgg behavior:
>
> >>> fig = plt.figure(figsize=[6, 4])
> >>> print fig.get_size_inches()
> [ 6.125 4.125]
> >>> fig.set_size_inches([6, 4], forward=True)
> >>> print fig.get_size_inches()
> [ 6. 3.64583333]
>
> Again, the initial size is off (due to the window border?), and the
> resized size is incorrect (toolbar again?).
>
> The WXAgg backend correctly sets the figure canvas to the desired
> size:
>
> >>> fig = plt.figure(figsize=[6, 4])
> >>> print fig.get_size_inches()
> [ 6. 4.]
> >>> fig.set_size_inches([6, 4], forward=True)
> >>> print fig.get_size_inches()
> [ 6. 4.]
>
> I didn't check any other backends.
>
> I didn't see any indication in the master branch that this behavior
> has changed since 1.0.1. I didn't find a report for this issue on the
> tracker; shall I create one?
>
>
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# -*- coding: utf-8 -*-
import wx
import matplotlib
matplotlib.use('WXAgg')
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas
from matplotlib.figure import Figure
class PlotReport(wx.NotebookPage):
def __init__(self, *args, **kwargs):
super(PlotReport, self).__init__(*args, style=wx.VSCROLL|wx.HSCROLL, **kwargs)
self.figure = Figure()
self.scrollarea = wx.ScrolledWindow(parent=self, style=wx.VSCROLL|wx.HSCROLL)
self.canvas = FigureCanvas(parent=self.scrollarea, id=wx.ID_ANY, figure=self.figure)
self.sizer = wx.BoxSizer(orient=wx.VERTICAL)
self.sizer.Add(item=self.canvas, proportion=1, flag=wx.EXPAND|wx.ALIGN_CENTER)
self.scrollarea.SetSizer(self.sizer)
self.set_good_scrollrate()
self.Bind(wx.EVT_SIZE, self.onSize)
self.canvas.Bind(wx.EVT_CHAR, self.onPlotChar)
def set_good_scrollrate(self):
size = self.scrollarea.GetVirtualSize()
self.scrollarea.SetScrollRate(size.GetWidth()/50, size.GetHeight()/50)
# zooming in and out with Ctrl-+ and Ctrl--
def onPlotChar(self, evt):
code = evt.GetKeyCode()
if evt.ControlDown() and code < 256:
if chr(code) == '+':
size = self.canvas.GetSize()
size.Scale(1.3, 1.3)
availSize = self.scrollarea.GetSize()
minw = max(size.GetWidth(), availSize.GetWidth())
minh = max(size.GetHeight(), availSize.GetHeight())
self.canvas.SetMinSize(wx.Size(minw, minh))
self.canvas.SetMaxSize(wx.DefaultSize)
self.sizer.SetVirtualSizeHints(self.scrollarea)
self.set_good_scrollrate()
elif chr(code) == '-':
size = self.canvas.GetSize()
size.Scale(1/1.3, 1/1.3)
self.canvas.SetMinSize(size)
self.canvas.SetMaxSize(wx.DefaultSize)
self.scrollarea.SetVirtualSizeHintsSz(wx.DefaultSize, size)
self.sizer.SetVirtualSizeHints(self.scrollarea)
self.set_good_scrollrate()
else:
evt.Skip()
else:
evt.Skip()
def onSize(self, evt):
self.set_good_scrollrate()
evt.Skip()------------------------------------------------------------------------------
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