1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/sandbox/bufferedcanvas.py	Thu Jun 10 20:28:29 2010 +0400
     1.3 @@ -0,0 +1,142 @@
     1.4 +"""
     1.5 +BufferedCanvas -- Double-buffered, flicker-free canvas widget
     1.6 +Copyright (C) 2005, 2006 Daniel Keep
     1.7 +
     1.8 +To use this widget, just override or replace the draw method.
     1.9 +This will be called whenever the widget size changes, or when
    1.10 +the update method is explicitly called.
    1.11 +
    1.12 +Please submit any improvements/bugfixes/ideas to the following
    1.13 +url:
    1.14 +
    1.15 +  http://wiki.wxpython.org/index.cgi/BufferedCanvas
    1.16 +
    1.17 +2006-04-29: Added bugfix for a crash on Mac provided by Marc Jans.
    1.18 +"""
    1.19 +
    1.20 +# Hint: try removing '.sp4msux0rz'
    1.21 +__author__ = 'Daniel Keep <daniel.keep.sp4msux0rz@gmail.com>'
    1.22 +
    1.23 +__license__ = """
    1.24 +This library is free software; you can redistribute it and/or
    1.25 +modify it under the terms of the GNU Lesser General Public License as
    1.26 +published by the Free Software Foundation; either version 2.1 of the
    1.27 +License, or (at your option) any later version.
    1.28 +
    1.29 +As a special exception, the copyright holders of this library 
    1.30 +hereby recind Section 3 of the GNU Lesser General Public License. This
    1.31 +means that you MAY NOT apply the terms of the ordinary GNU General 
    1.32 +Public License instead of this License to any given copy of the
    1.33 +Library. This has been done to prevent users of the Library from being
    1.34 +denied access or the ability to use future improvements.
    1.35 +
    1.36 +This library is distributed in the hope that it will be useful, but
    1.37 +WITHOUT ANY WARRANTY; without even the implied warranty of
    1.38 +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
    1.39 +General Public License for more details.
    1.40 +
    1.41 +You should have received a copy of the GNU Lesser General Public
    1.42 +License along with this library; if not, write to the Free Software
    1.43 +Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    1.44 +"""
    1.45 +
    1.46 +__all__ = ['BufferedCanvas']
    1.47 +
    1.48 +import wx
    1.49 +import wx.lib.scrolledpanel as sp
    1.50 +
    1.51 +class BufferedCanvas(sp.ScrolledPanel):
    1.52 +    """
    1.53 +    Implements a double-buffered, flicker-free canvas widget.
    1.54 +
    1.55 +    Standard usage is to subclass this class, and override the
    1.56 +    draw method.  The draw method is passed a device context, which
    1.57 +    should be used to do your drawing.
    1.58 +
    1.59 +    Also, you should NOT call dc.BeginDrawing() and dc.EndDrawing() --
    1.60 +    these methods are automatically called for you, although you still
    1.61 +    need to manually clear the device context.
    1.62 +
    1.63 +    If you want to force a redraw (for whatever reason), you should
    1.64 +    call the update method.  This is because the draw method is never
    1.65 +    called as a result of an EVT_PAINT event.
    1.66 +    """
    1.67 +
    1.68 +    # These are our two buffers.  Just be aware that when the buffers
    1.69 +    # are flipped, the REFERENCES are swapped.  So I wouldn't want to
    1.70 +    # try holding onto explicit references to one or the other ;)
    1.71 +    buffer = None
    1.72 +    backbuffer = None
    1.73 +
    1.74 +    def __init__(self,
    1.75 +                 parent,
    1.76 +                 ID=-1,
    1.77 +                 pos=wx.DefaultPosition,
    1.78 +                 size=wx.DefaultSize,
    1.79 +                 style=wx.NO_FULL_REPAINT_ON_RESIZE):
    1.80 +        sp.ScrolledPanel.__init__(self,parent,ID,pos,size,style)
    1.81 +
    1.82 +        # Bind events
    1.83 +        self.Bind(wx.EVT_PAINT, self.onPaint)
    1.84 +        self.Bind(wx.EVT_SIZE, self.onSize)
    1.85 +
    1.86 +        # Disable background erasing (flicker-licious)
    1.87 +        def disable_event(*pargs,**kwargs):
    1.88 +            pass # the sauce, please
    1.89 +        self.Bind(wx.EVT_ERASE_BACKGROUND, disable_event)
    1.90 +
    1.91 +        # Ensure that the buffers are setup correctly
    1.92 +        self.onSize(None)
    1.93 +
    1.94 +    ##
    1.95 +    ## General methods
    1.96 +    ##
    1.97 +
    1.98 +    def draw(self,dc):
    1.99 +        """
   1.100 +        Stub: called when the canvas needs to be re-drawn.
   1.101 +        """
   1.102 +        pass
   1.103 +
   1.104 +
   1.105 +    def flip(self):
   1.106 +        """
   1.107 +        Flips the front and back buffers.
   1.108 +        """
   1.109 +        self.buffer,self.backbuffer = self.backbuffer,self.buffer
   1.110 +        self.Refresh()
   1.111 +
   1.112 +
   1.113 +    def update(self):
   1.114 +        """
   1.115 +        Causes the canvas to be updated.
   1.116 +        """
   1.117 +        dc = wx.MemoryDC()
   1.118 +        dc.SelectObject(self.backbuffer)
   1.119 +        dc.BeginDrawing()
   1.120 +        self.draw(dc)
   1.121 +        dc.EndDrawing()
   1.122 +        self.flip()
   1.123 +
   1.124 +    ##
   1.125 +    ## Event handlers
   1.126 +    ##
   1.127 +
   1.128 +    def onPaint(self, event):
   1.129 +        # Blit the front buffer to the screen
   1.130 +        dc = wx.BufferedPaintDC(self, self.buffer)
   1.131 +
   1.132 +
   1.133 +    def onSize(self, event):
   1.134 +        # Here we need to create a new off-screen buffer to hold
   1.135 +        # the in-progress drawings on.
   1.136 +        width,height = self.GetClientSizeTuple()
   1.137 +        if width == 0:
   1.138 +            width = 1
   1.139 +        if height == 0:
   1.140 +            height = 1
   1.141 +        self.buffer = wx.EmptyBitmap(width,height)
   1.142 +        self.backbuffer = wx.EmptyBitmap(width,height)
   1.143 +
   1.144 +        # Now update the screen
   1.145 +        self.update()

     2.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     2.2 +++ b/sandbox/gl.py	Thu Jun 10 20:28:29 2010 +0400
     2.3 @@ -0,0 +1,46 @@
     2.4 +#!/usr/bin/python
     2.5 +# http://disruption.ca/gutil/example3/example3a.html
     2.6 +# vim: set noet:
     2.7 +
     2.8 +import gutil
     2.9 +import pygame
    2.10 +from pygame.locals import *
    2.11 +from OpenGL.GL import *
    2.12 +
    2.13 +from Image import Image
    2.14 +
    2.15 +
    2.16 +def main():
    2.17 +	pygame.init()
    2.18 +	gutil.initializeDisplay(800, 600)
    2.19 +
    2.20 +	done = False
    2.21 +
    2.22 +	cow = Image('cow')
    2.23 +	alien = Image('alien')
    2.24 +
    2.25 +	white = (255,255,255,255)
    2.26 +	stringTex, w, h, tw, th = gutil.loadText("Cow!", color=white)
    2.27 +	stringDL = gutil.createTexDL(stringTex, tw, th)
    2.28 +
    2.29 +	while not done:
    2.30 +		glClear(GL_COLOR_BUFFER_BIT)
    2.31 +		glLoadIdentity()
    2.32 +		glColor4f(1.0,1.0,1.0,1.0)
    2.33 +		glTranslatef(100, 400, 0)
    2.34 +		glCallList(stringDL)
    2.35 +
    2.36 +		cow.draw(pos=(100,100),width=128,height=128)
    2.37 +		alien.draw(pos=(400, 400),rotation=-15,color=(.9,.3,.2,1))
    2.38 +
    2.39 +
    2.40 +		pygame.display.flip()
    2.41 +
    2.42 +		eventlist = pygame.event.get()
    2.43 +		for event in eventlist:
    2.44 +			if event.type == QUIT \
    2.45 +			   or event.type == KEYDOWN and event.key == K_ESCAPE:
    2.46 +				done = True
    2.47 +
    2.48 +if __name__ == '__main__':
    2.49 +	main()

     3.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     3.2 +++ b/sandbox/wx-dc.py	Thu Jun 10 20:28:29 2010 +0400
     3.3 @@ -0,0 +1,52 @@
     3.4 +#!/usr/bin/python
     3.5 +
     3.6 +import wx
     3.7 +import bufferedcanvas
     3.8 +import common
     3.9 +
    3.10 +class Text(bufferedcanvas.BufferedCanvas):
    3.11 +
    3.12 +	def __init__(self, seqs, *args, **kw):
    3.13 +		self.seqs = seqs
    3.14 +		self.font = wx.FFont(12, wx.FONTFAMILY_MODERN)
    3.15 +		bufferedcanvas.BufferedCanvas.__init__(self, *args, **kw)
    3.16 +
    3.17 +		dc = wx.ClientDC(self)
    3.18 +		dc.SetFont(self.font)
    3.19 +		w = (len(seqs[0][1])+1) * dc.GetCharWidth()
    3.20 +		h = (len(seqs)+1) * (dc.GetCharHeight() + 1)
    3.21 +		self.size = w, h
    3.22 +		self.SetVirtualSize(self.size)
    3.23 +
    3.24 +		self.Bind(wx.EVT_SCROLL, self.onPaint)
    3.25 +
    3.26 +		self.SetupScrolling()
    3.27 +
    3.28 +	def draw(self, dc):
    3.29 +		dc.SetBackground(wx.Brush("White"))
    3.30 +		dc.Clear()
    3.31 +		dc.SetFont(self.font)
    3.32 +
    3.33 +		w = dc.GetCharWidth()
    3.34 +		h = dc.GetCharHeight()
    3.35 +		for i, (name, body, ids, colors) in enumerate(self.seqs):
    3.36 +			for j in xrange(len(body)):
    3.37 +				x = j * w
    3.38 +				y = i * (h + 1)
    3.39 +				dc.SetBrush(wx.Brush(colors[j]))
    3.40 +				dc.SetPen(wx.Pen(colors[j]))
    3.41 +				dc.DrawRectangle(x, y, x + w, y + h)
    3.42 +				dc.SetPen(wx.Pen("Black"))
    3.43 +				dc.DrawText(body[j], x, y)
    3.44 +
    3.45 +		if hasattr(self, 'size'):
    3.46 +			self.SetVirtualSize(self.size)
    3.47 +
    3.48 +seqs = common.autoload('data/small.fasta')
    3.49 +
    3.50 +app = wx.App(False)
    3.51 +top = wx.Frame(None, title='Example', size=(500, 500))
    3.52 +text = Text(seqs, top)
    3.53 +top.Show(True)
    3.54 +
    3.55 +app.MainLoop()