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May 28, 2014 14:15
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Experimental matplotlib plotting within wxPython.
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| #******************************************************************************* | |
| # wxplot.py | |
| # Zac Hester <zac.hester@gmail.com> | |
| # 2012-08-10 | |
| # | |
| # Experimental numpy/matplotlib plotting within wxPython. | |
| # | |
| #******************************************************************************* | |
| #------------------------------------------------------------------------------- | |
| # IMPORTS | |
| #------------------------------------------------------------------------------- | |
| import math | |
| import numpy | |
| import sys | |
| import wx | |
| # Special-case importing of parts of matplotlib | |
| import matplotlib | |
| matplotlib.use( 'WXAgg' ) | |
| from matplotlib.figure import Figure | |
| from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg | |
| #------------------------------------------------------------------------------- | |
| # VARIABLES | |
| #------------------------------------------------------------------------------- | |
| #------------------------------------------------------------------------------- | |
| # CLASSES | |
| #------------------------------------------------------------------------------- | |
| #=============================================================================== | |
| class PlotPanel( FigureCanvasWxAgg ): | |
| """ wx panel for plotting """ | |
| #=========================================================================== | |
| def __init__( self, parent, id = wx.ID_ANY, *args, **kwargs ): | |
| self.figure = Figure( ( 4.0, 3.0 ), dpi = 100 ) | |
| super( PlotPanel, self ).__init__( parent, | |
| id, | |
| self.figure, | |
| *args, | |
| **kwargs ) | |
| self.plot = self.figure.add_subplot( 1, 1, 1 ) | |
| self.pick_radius = 5 | |
| self.mpl_connect( 'pick_event', self.handlePick ) | |
| #=========================================================================== | |
| def render( self ): | |
| """ renders/redraws the plot """ | |
| self.plot.clear() | |
| #### replace with real source of data | |
| y = [ math.sin( ( float( i ) / 63.0 ) * 2.0 * 3.14159 ) | |
| for i in range( 64 ) ] | |
| x = [ float( i ) / 63.0 for i in range( 64 ) ] | |
| self.plot.plot( x, y, picker = self.pick_radius ) | |
| self.draw() | |
| #=========================================================================== | |
| def setSize( self, width, height ): | |
| """ resizes the figure """ | |
| self.figure.set_size_inches( ( float( width ) | |
| / float( self.figure.dpi ) ), | |
| ( float( height ) | |
| / float( self.figure.dpi ) ) ) | |
| #=========================================================================== | |
| def handlePick( self, event ): | |
| # Picker events should include an artist attribute. | |
| if not hasattr( event, 'artist' ): | |
| print 'Pick event for event without artist: %s' \ | |
| % event.__class__.__name__ | |
| # Check for pick events without mouse events. | |
| elif not hasattr( event, 'mouseevent' ): | |
| print 'Pick event for event without mouseevent: %s' \ | |
| % event.__class__.__name__ | |
| # Check for Line2D objects selected by the picker. | |
| elif isinstance( event.artist, matplotlib.lines.Line2D ): | |
| xdata = event.artist.get_xdata() | |
| ydata = event.artist.get_ydata() | |
| # Default to the first/only data point index. | |
| index = event.ind[ 0 ] | |
| # Check for multiple points inside the picker hit region, and that | |
| # the pick event populated mouse coordinates. | |
| if ( ( len( event.ind ) > 1 ) | |
| and ( event.mouseevent.xdata is not None ) ): | |
| # Set a tuple for the mouse data coordinates. | |
| mdcoord = ( event.mouseevent.xdata, | |
| event.mouseevent.ydata ) | |
| # Set an excessive radius between data points in the same | |
| # picker hit region. | |
| mpradius = self.pick_radius + 1.0 | |
| # Check the distances between all included data points and | |
| # the coordinate where the mouse was clicked. | |
| for i in event.ind: | |
| r = self.getRadius( mdcoord, | |
| ( xdata[ i ], ydata[ i ] ) ) | |
| # Try to select the data point closest to the click. | |
| if r < mpradius: | |
| mpradius = r | |
| index = i | |
| print 'Line2D pick: %f %f' % ( xdata[ index ], ydata[ index ] ) | |
| # Check for Rectangle objects selected by the picker. | |
| elif isinstance( event.artist, matplotlib.patches.Rectangle ): | |
| print 'Rectangle pick: ', event.artist.patch.get_path() | |
| # Check for Text objects selected by the picker. | |
| elif isinstance( event.artist, matplotlib.text.Text ): | |
| print 'Text pick: ', event.artist.text.get_text() | |
| # This is an artist not supported by this pick handler. | |
| else: | |
| print 'Pick event for unsupported artist: %s' \ | |
| % event.artist.__class__.__name__ | |
| #=========================================================================== | |
| def getRadius( self, a, b ): | |
| """ calculate the distance between two points (array-like x,y) """ | |
| return numpy.sqrt( ( ( b[ 0 ] - a[ 0 ] ) ** 2 ) | |
| + ( ( b[ 1 ] - a[ 1 ] ) ** 2 ) ) | |
| #=============================================================================== | |
| class PlotFrame( wx.Frame ): | |
| """ wx frame for plotting """ | |
| #=========================================================================== | |
| def __init__( self, parent, id, title ): | |
| """ instantiate the frame object """ | |
| # Call the parent constructor. | |
| super( PlotFrame, self ).__init__( parent, id, title ) | |
| # Create a new plot panel. | |
| self.plot = PlotPanel( self ) | |
| ### testing | |
| #self.plot.setSize( 640, 480 ) | |
| # Run the first render of the plot. | |
| self.plot.render() | |
| # Attach it to the layout. | |
| vbox = wx.BoxSizer( wx.VERTICAL ) | |
| vbox.Add( self.plot, flag = wx.EXPAND ) | |
| hbox = wx.BoxSizer( wx.HORIZONTAL ) | |
| hbox.Add( vbox, flag = wx.EXPAND ) | |
| self.SetAutoLayout( True ) | |
| self.SetSizer( hbox ) | |
| # Tell the sizer to resize the frame to fit its minimum dimension. | |
| hbox.Fit( self ) | |
| # Make sure the frame was drawn the layout at least once. | |
| self.Layout() | |
| #=============================================================================== | |
| class PlotApp( wx.App ): | |
| """ wx plotting application """ | |
| #=========================================================================== | |
| def OnInit( self ): | |
| """ handle application initialization events """ | |
| # Create the top-level frame for the application. | |
| frame = PlotFrame( None, wx.ID_ANY, "wxPlot" ) | |
| # Ask the window manager to display it. | |
| frame.Show( True ) | |
| # Set the frame as the application's top frame. | |
| self.SetTopWindow( frame ) | |
| # Return success. | |
| return True | |
| #------------------------------------------------------------------------------- | |
| # FUNCTIONS | |
| #------------------------------------------------------------------------------- | |
| #=============================================================================== | |
| def main( argv ): | |
| """ Script execution entry point """ | |
| # Create the application (put stdout/stderr on the shell). | |
| app = PlotApp( False ) | |
| # Run the application loop. | |
| app.MainLoop() | |
| # Return success. | |
| return 0 | |
| #=============================================================================== | |
| if __name__ == '__main__': | |
| sys.exit( main( sys.argv ) ) |
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