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cmoadcmoad
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added blitting for qt4agg
svn path=/trunk/matplotlib/; revision=2585
1 parent dac8047 commit 73ed530

4 files changed

Lines changed: 107 additions & 25 deletions

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‎CHANGELOG‎

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2006-07-19 Added blitting for Qt4Agg - CM
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2006-07-19 Added lasso widget and example examples/lasso_demo.py - JDH
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2006-07-18 Added blitting for QtAgg backend - CM

‎examples/animation_blit_qt4.py‎

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# For detailed comments on animation and the techniqes used here, see
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# the wiki entry http://www.scipy.org/Cookbook/Matplotlib/Animations
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import os, sys
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import matplotlib
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matplotlib.use('Qt4Agg') # qt4 example
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from PyQt4 import QtCore, QtGui
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ITERS = 1000
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import pylab as p
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import matplotlib.numerix as nx
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import time
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class BlitQT(QtCore.QObject):
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def __init__(self):
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QtCore.QObject.__init__(self, None)
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self.ax = p.subplot(111)
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self.canvas = self.ax.figure.canvas
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self.cnt = 0
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# create the initial line
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self.x = nx.arange(0,2*nx.pi,0.01)
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self.line, = p.plot(self.x, nx.sin(self.x), animated=True, lw=2)
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self.background = None
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def timerEvent(self, evt):
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if self.background is None:
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self.background = self.canvas.copy_from_bbox(self.ax.bbox)
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# restore the clean slate background
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self.canvas.restore_region(self.background)
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# update the data
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self.line.set_ydata(nx.sin(self.x+self.cnt/10.0))
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# just draw the animated artist
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self.ax.draw_artist(self.line)
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# just redraw the axes rectangle
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self.canvas.blit(self.ax.bbox)
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if self.cnt==ITERS:
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# print the timing info and quit
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print 'FPS:' , ITERS/(time.time()-self.tstart)
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sys.exit()
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else:
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self.cnt += 1
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p.subplots_adjust(left=0.3, bottom=0.3) # check for flipy bugs
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p.grid() # to ensure proper background restore
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app = BlitQT()
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# for profiling
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app.tstart = time.time()
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app.startTimer(0)
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p.show()

‎lib/matplotlib/backends/backend_qt4agg.py‎

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Original file line numberDiff line numberDiff line change
@@ -67,36 +67,47 @@ def paintEvent( self, e ):
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shown onscreen.
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"""
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FigureCanvasQT.paintEvent( self, e )
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#FigureCanvasQT.paintEvent( self, e )
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if DEBUG: print 'FigureCanvasQtAgg.paintEvent: ', \
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self.get_width_height()
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p = QtGui.QPainter( self )
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FigureCanvasAgg.draw( self )
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# only replot data when needed
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if ( self.replot ):
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stringBuffer = str( self.buffer_rgba(0,0) )
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# matplotlib is in rgba byte order.
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# qImage wants to put the bytes into argb format and
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# is in a 4 byte unsigned int. little endian system is LSB first
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# and expects the bytes in reverse order (bgra).
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if ( QtCore.QSysInfo.ByteOrder == QtCore.QSysInfo.LittleEndian ):
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stringBuffer = self.renderer._renderer.tostring_bgra()
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else:
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stringBuffer = self.renderer._renderer.tostring_argb()
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qImage = QtGui.QImage( stringBuffer, self.renderer.width,
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self.renderer.height,
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QtGui.QImage.Format_ARGB32)
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if type(self.replot) is bool: # might be a bbox for blitting
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if ( self.replot ):
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#stringBuffer = str( self.buffer_rgba(0,0) )
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FigureCanvasAgg.draw( self )
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# matplotlib is in rgba byte order.
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# qImage wants to put the bytes into argb format and
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# is in a 4 byte unsigned int. little endian system is LSB first
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# and expects the bytes in reverse order (bgra).
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if ( QtCore.QSysInfo.ByteOrder == QtCore.QSysInfo.LittleEndian ):
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stringBuffer = self.renderer._renderer.tostring_bgra()
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else:
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stringBuffer = self.renderer._renderer.tostring_argb()
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qImage = QtGui.QImage( stringBuffer, self.renderer.width,
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self.renderer.height,
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QtGui.QImage.Format_ARGB32)
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self.pixmap = self.pixmap.fromImage( qImage )
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p.drawPixmap( QtCore.QPoint( 0, 0 ), self.pixmap )
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# draw the zoom rectangle to the QPainter
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if ( self.drawRect ):
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p.setPen( QtGui.QPen( QtCore.Qt.black, 1, QtCore.Qt.DotLine ) )
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p.drawRect( self.rect[0], self.rect[1], self.rect[2], self.rect[3] )
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# we are blitting here
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else:
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bbox = self.replot
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w, h = int(bbox.width()), int(bbox.height())
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l, t = bbox.ll().x().get(), bbox.ur().y().get()
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reg = self.copy_from_bbox(bbox)
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stringBuffer = reg.to_string()
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qImage = QtGui.QImage(stringBuffer, w, h, QtGui.QImage.Format_ARGB32)
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self.pixmap = self.pixmap.fromImage( qImage )
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p.drawPixmap( QtCore.QPoint( 0, 0 ), self.pixmap )
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# draw the zoom rectangle to the QPainter
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if ( self.drawRect ):
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p.setPen( QtGui.QPen( QtCore.Qt.black, 1, QtCore.Qt.DotLine ) )
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p.drawRect( self.rect[0], self.rect[1], self.rect[2], self.rect[3] )
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p.drawPixmap(QtCore.QPoint(l, self.renderer.height-t), self.pixmap)
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p.end()
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self.replot = False
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if DEBUG: print "FigureCanvasQtAgg.draw"
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self.replot = True
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self.repaint( )
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self.update( )
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def blit(self, bbox=None):
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"""
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Blit the region in bbox
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"""
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self.replot = bbox
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w, h = int(bbox.width()), int(bbox.height())
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l, t = bbox.ll().x().get(), bbox.ur().y().get()
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self.update(l, self.renderer.height-t, w, h)
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def print_figure( self, filename, dpi=150, facecolor='w', edgecolor='w',
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orientation='portrait', **kwargs ):

‎lib/matplotlib/backends/backend_qtagg.py‎

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@@ -78,7 +78,7 @@ def paintEvent( self, e ):
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if type(self.replot) is bool: # might be a bbox for blitting
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if self.replot:
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FigureCanvasAgg.draw( self )
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stringBuffer = str( self.buffer_rgba(0,0) )
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#stringBuffer = str( self.buffer_rgba(0,0) )
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# matplotlib is in rgba byte order.
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# qImage wants to put the bytes into argb format and

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