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import wx
try:
import wx.lib.wxcairo
import cairo
haveCairo = True
except ImportError:
haveCairo = False
from math import pi as M_PI # used by many snippets
from snippets import snip_list, snippet_normalize
from Main import opj, DemoCodeEditor
#----------------------------------------------------------------------
# TODO: Add the ability for the user to edit and render their own snippet
class DisplayPanel(wx.Panel):
def __init__(self, parent):
wx.Panel.__init__(self, parent, style=wx.BORDER_SIMPLE)
self.Bind(wx.EVT_PAINT, self.OnPaint)
self.curr_snippet = ''
def OnPaint(self, evt):
dc = wx.PaintDC(self)
if self.curr_snippet:
width, height = self.GetClientSize()
cr = wx.lib.wxcairo.ContextFromDC(dc)
exec(self.curr_snippet, globals(), locals())
def SetSnippet(self, text):
self.curr_snippet = text
self.Refresh()
class TestPanel(wx.Panel):
def __init__(self, parent, log):
self.log = log
wx.Panel.__init__(self, parent, -1)
self.lb = wx.ListBox(self, choices=snip_list)
self.canvas = DisplayPanel(self)
self.editor = DemoCodeEditor(self, style=wx.BORDER_SIMPLE)
self.editor.SetEditable(False)
self.Bind(wx.EVT_LISTBOX, self.OnListBoxSelect, self.lb)
sizer = wx.BoxSizer(wx.HORIZONTAL)
sizer.Add(self.lb, 0, wx.EXPAND)
sizer.Add((15,1))
vbox = wx.BoxSizer(wx.VERTICAL)
vbox.Add(self.canvas, 1, wx.EXPAND)
vbox.Add((1, 15))
vbox.Add(self.editor, 1, wx.EXPAND)
sizer.Add(vbox, 1, wx.EXPAND)
border = wx.BoxSizer()
border.Add(sizer, 1, wx.EXPAND|wx.ALL, 30)
self.SetSizer(border)
def OnListBoxSelect(self, evt):
snippet_file = opj('snippets/%s.py' % evt.GetString())
text = file(snippet_file).read()
self.canvas.SetSnippet(text)
self.editor.SetValue(text)
#----------------------------------------------------------------------
if not haveCairo:
from wx.lib.msgpanel import MessagePanel
def runTest(frame, nb, log):
win = MessagePanel(nb, 'This demo requires the Pycairo package,\n'
'or there is some other unmet dependency.',
'Sorry', wx.ICON_WARNING)
return win
else:
def runTest(frame, nb, log):
win = TestPanel(nb, log)
return win
#----------------------------------------------------------------------
if haveCairo:
extra = "\n<h3>wx.lib.wxcairo</h3>\n%s" % (
wx.lib.wxcairo.__doc__.replace('\n\n', '\n<p>'))
else:
extra = '\n<p>See the docstring in the wx.lib.wxcairo module for details about installing dependencies.'
overview = """<html><body>
<h2><center>Cairo Integration</center></h2>
The wx.lib.wxcairo module provides a bit of glue that will allow you to
use the Pycairo package drawing directly on wx.DC's.
<p> This sample draws the standard 'snippet' examples that come with
the Pycairo pacakge, and a few others. The C version of the samples
can be seen at http://cairographics.org/samples/
<p> In most snippets you'll see a call to a snippet_normalize()
function. This is part of the demo and not part of Cairo. It is
simply scaling the context such that the range of 0.0 to 1.0 is the
min(width, height) of the window in pixels. In other words, it allows
the rendering code to use a range or 0.0 to 1.0 and it will always fit
in the drawing area. (Try resizing the demo and reselecting a snippet
to see this.)
<pre>
def snippet_normalize(ctx, width, height):
size = min(width, height)
ctx.scale(size, size)
ctx.set_line_width(0.04)
</pre>
%s
</body></html>
""" % extra
if __name__ == '__main__':
import sys,os
import run
run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
|
