-"""
-This is a port of Konrad Hinsen's tkPlotCanvas.py plotting module.
-After thinking long and hard I came up with the name "wxPlotCanvas.py".
-
-This file contains two parts; first the re-usable library stuff, then, after
-a "if __name__=='__main__'" test, a simple frame and a few default plots
-for testing.
-
-Harm van der Heijden, feb 1999
-
-Original comment follows below:
-# This module defines a plot widget for Tk user interfaces.
-# It supports only elementary line plots at the moment.
-# See the example at the end for documentation...
-#
-# Written by Konrad Hinsen <hinsen@cnrs-orleans.fr>
-# With contributions from RajGopal Srinivasan <raj@cherubino.med.jhmi.edu>
-# Last revision: 1998-7-28
-#
-"""
-
-from wxPython import wx
-
-# Not everybody will have Numeric, so let's be cool about it...
-try:
- import Numeric
-except:
- # bummer!
- d = wx.wxMessageDialog(wx.NULL,
- """This module requires the Numeric module, which could not be imported.
-It probably is not installed (it's not part of the standard Python
-distribution). See the Python site (http://www.python.org) for
-information on downloading source or binaries.""",
- "Numeric not found")
- if d.ShowModal() == wx.wxID_CANCEL:
- d = wx.wxMessageDialog(wx.NULL, "I kid you not! Pressing Cancel won't help you!", "Not a joke", wx.wxOK)
- d.ShowModal()
- import sys
- sys.exit()
-
-#
-# Plotting classes...
-#
-class PolyPoints:
-
- def __init__(self, points, attr):
- self.points = Numeric.array(points)
- self.scaled = self.points
- self.attributes = {}
- for name, value in self._attributes.items():
- try:
- value = attr[name]
- except KeyError: pass
- self.attributes[name] = value
-
- def boundingBox(self):
- return Numeric.minimum.reduce(self.points), \
- Numeric.maximum.reduce(self.points)
-
- def scaleAndShift(self, scale=1, shift=0):
- self.scaled = scale*self.points+shift
-
-
-class PolyLine(PolyPoints):
-
- def __init__(self, points, **attr):
- PolyPoints.__init__(self, points, attr)
-
- _attributes = {'color': 'black',
- 'width': 1}
-
- def draw(self, dc):
- color = self.attributes['color']
- width = self.attributes['width']
- arguments = []
- dc.SetPen(wx.wxPen(wx.wxNamedColour(color), width))
- dc.DrawLines(map(tuple,self.scaled))
-
-
-class PolyMarker(PolyPoints):
-
- def __init__(self, points, **attr):
-
- PolyPoints.__init__(self, points, attr)
-
- _attributes = {'color': 'black',
- 'width': 1,
- 'fillcolor': None,
- 'size': 2,
- 'fillstyle': wx.wxSOLID,
- 'outline': 'black',
- 'marker': 'circle'}
-
- def draw(self, dc):
- color = self.attributes['color']
- width = self.attributes['width']
- size = self.attributes['size']
- fillcolor = self.attributes['fillcolor']
- fillstyle = self.attributes['fillstyle']
- marker = self.attributes['marker']
-
- dc.SetPen(wx.wxPen(wx.wxNamedColour(color),width))
- if fillcolor:
- dc.SetBrush(wx.wxBrush(wx.wxNamedColour(fillcolor),fillstyle))
- else:
- dc.SetBrush(wx.wxBrush(wx.wxNamedColour('black'), wx.wxTRANSPARENT))
-
- self._drawmarkers(dc, self.scaled, marker, size)
-
- def _drawmarkers(self, dc, coords, marker,size=1):
- f = eval('self._' +marker)
- for xc, yc in coords:
- f(dc, xc, yc, size)
-
- def _circle(self, dc, xc, yc, size=1):
- dc.DrawEllipse(xc-2.5*size,yc-2.5*size,5.*size,5.*size)
-
- def _dot(self, dc, xc, yc, size=1):
- dc.DrawPoint(xc,yc)
-
- def _square(self, dc, xc, yc, size=1):
- dc.DrawRectangle(xc-2.5*size,yc-2.5*size,5.*size,5.*size)
-
- def _triangle(self, dc, xc, yc, size=1):
- dc.DrawPolygon([(-0.5*size*5,0.2886751*size*5),
- (0.5*size*5,0.2886751*size*5),
- (0.0,-0.577350*size*5)],xc,yc)
-
- def _triangle_down(self, dc, xc, yc, size=1):
- dc.DrawPolygon([(-0.5*size*5,-0.2886751*size*5),
- (0.5*size*5,-0.2886751*size*5),
- (0.0,0.577350*size*5)],xc,yc)
-
- def _cross(self, dc, xc, yc, size=1):
- dc.DrawLine(xc-2.5*size,yc-2.5*size,xc+2.5*size,yc+2.5*size)
- dc.DrawLine(xc-2.5*size,yc+2.5*size,xc+2.5*size,yc-2.5*size)
-
- def _plus(self, dc, xc, yc, size=1):
- dc.DrawLine(xc-2.5*size,yc,xc+2.5*size,yc)
- dc.DrawLine(xc,yc-2.5*size,xc,yc+2.5*size)
-
-class PlotGraphics:
-
- def __init__(self, objects):
- self.objects = objects
-
- def boundingBox(self):
- p1, p2 = self.objects[0].boundingBox()
- for o in self.objects[1:]:
- p1o, p2o = o.boundingBox()
- p1 = Numeric.minimum(p1, p1o)
- p2 = Numeric.maximum(p2, p2o)
- return p1, p2
-
- def scaleAndShift(self, scale=1, shift=0):
- for o in self.objects:
- o.scaleAndShift(scale, shift)
-
- def draw(self, canvas):
- for o in self.objects:
- o.draw(canvas)
-
- def __len__(self):
- return len(self.objects)
-
- def __getitem__(self, item):
- return self.objects[item]
-
-
-class PlotCanvas(wx.wxWindow):
-
- def __init__(self, parent, id = -1):
- wx.wxWindow.__init__(self, parent, id, wx.wxPyDefaultPosition, wx.wxPyDefaultSize)
- self.border = (1,1)
- self.SetClientSizeWH(400,400)
- self.SetBackgroundColour(wx.wxNamedColour("white"))
-
- wx.EVT_SIZE(self,self.reconfigure)
- self._setsize()
- self.last_draw = None
-# self.font = self._testFont(font)
-
- def OnPaint(self, event):
- pdc = wx.wxPaintDC(self)
- if self.last_draw is not None:
- apply(self.draw, self.last_draw + (pdc,))
-
- def reconfigure(self, event):
- (new_width,new_height) = self.GetClientSizeTuple()
- if new_width == self.width and new_height == self.height:
- return
- self._setsize()
- # self.redraw()
-
- def _testFont(self, font):
- if font is not None:
- bg = self.canvas.cget('background')
- try:
- item = CanvasText(self.canvas, 0, 0, anchor=NW,
- text='0', fill=bg, font=font)
- self.canvas.delete(item)
- except TclError:
- font = None
- return font
-
- def _setsize(self):
- (self.width,self.height) = self.GetClientSizeTuple();
- self.plotbox_size = 0.97*Numeric.array([self.width, -self.height])
- xo = 0.5*(self.width-self.plotbox_size[0])
- yo = self.height-0.5*(self.height+self.plotbox_size[1])
- self.plotbox_origin = Numeric.array([xo, yo])
-
- def draw(self, graphics, xaxis = None, yaxis = None, dc = None):
- if dc == None: dc = wx.wxClientDC(self)
- dc.BeginDrawing()
- dc.Clear()
- self.last_draw = (graphics, xaxis, yaxis)
- p1, p2 = graphics.boundingBox()
- xaxis = self._axisInterval(xaxis, p1[0], p2[0])
- yaxis = self._axisInterval(yaxis, p1[1], p2[1])
- text_width = [0., 0.]
- text_height = [0., 0.]
- if xaxis is not None:
- p1[0] = xaxis[0]
- p2[0] = xaxis[1]
- xticks = self._ticks(xaxis[0], xaxis[1])
- bb = dc.GetTextExtent(xticks[0][1])
- text_height[1] = bb[1]
- text_width[0] = 0.5*bb[0]
- bb = dc.GetTextExtent(xticks[-1][1])
- text_width[1] = 0.5*bb[0]
- else:
- xticks = None
- if yaxis is not None:
- p1[1] = yaxis[0]
- p2[1] = yaxis[1]
- yticks = self._ticks(yaxis[0], yaxis[1])
- for y in yticks:
- bb = dc.GetTextExtent(y[1])
- text_width[0] = max(text_width[0],bb[0])
- h = 0.5*bb[1]
- text_height[0] = h
- text_height[1] = max(text_height[1], h)
- else:
- yticks = None
- text1 = Numeric.array([text_width[0], -text_height[1]])
- text2 = Numeric.array([text_width[1], -text_height[0]])
- scale = (self.plotbox_size-text1-text2) / (p2-p1)
- shift = -p1*scale + self.plotbox_origin + text1
- self._drawAxes(dc, xaxis, yaxis, p1, p2,
- scale, shift, xticks, yticks)
- graphics.scaleAndShift(scale, shift)
- graphics.draw(dc)
- dc.EndDrawing()
-
- def _axisInterval(self, spec, lower, upper):
- if spec is None:
- return None
- if spec == 'minimal':
- if lower == upper:
- return lower-0.5, upper+0.5
- else:
- return lower, upper
- if spec == 'automatic':
- range = upper-lower
- if range == 0.:
- return lower-0.5, upper+0.5
- log = Numeric.log10(range)
- power = Numeric.floor(log)
- fraction = log-power
- if fraction <= 0.05:
- power = power-1
- grid = 10.**power
- lower = lower - lower % grid
- mod = upper % grid
- if mod != 0:
- upper = upper - mod + grid
- return lower, upper
- if type(spec) == type(()):
- lower, upper = spec
- if lower <= upper:
- return lower, upper
- else:
- return upper, lower
- raise ValueError, str(spec) + ': illegal axis specification'
-
- def _drawAxes(self, dc, xaxis, yaxis,
- bb1, bb2, scale, shift, xticks, yticks):
- dc.SetPen(wx.wxPen(wx.wxNamedColour('BLACK'),1))
- if xaxis is not None:
- lower, upper = xaxis
- text = 1
- for y, d in [(bb1[1], -3), (bb2[1], 3)]:
- p1 = scale*Numeric.array([lower, y])+shift
- p2 = scale*Numeric.array([upper, y])+shift
- dc.DrawLine(p1[0],p1[1],p2[0],p2[1])
- for x, label in xticks:
- p = scale*Numeric.array([x, y])+shift
- dc.DrawLine(p[0],p[1],p[0],p[1]+d)
- if text:
- dc.DrawText(label,p[0],p[1])
- text = 0
-
- if yaxis is not None:
- lower, upper = yaxis
- text = 1
- h = dc.GetCharHeight()
- for x, d in [(bb1[0], -3), (bb2[0], 3)]:
- p1 = scale*Numeric.array([x, lower])+shift
- p2 = scale*Numeric.array([x, upper])+shift
- dc.DrawLine(p1[0],p1[1],p2[0],p2[1])
- for y, label in yticks:
- p = scale*Numeric.array([x, y])+shift
- dc.DrawLine(p[0],p[1],p[0]-d,p[1])
- if text:
- dc.DrawText(label,p[0]-dc.GetTextExtent(label)[0],
- p[1]-0.5*h)
- text = 0
-
- def _ticks(self, lower, upper):
- ideal = (upper-lower)/7.
- log = Numeric.log10(ideal)
- power = Numeric.floor(log)
- fraction = log-power
- factor = 1.
- error = fraction
- for f, lf in self._multiples:
- e = Numeric.fabs(fraction-lf)
- if e < error:
- error = e
- factor = f
- grid = factor * 10.**power
- if power > 3 or power < -3:
- format = '%+7.0e'
- elif power >= 0:
- digits = max(1, int(power))
- format = '%' + `digits`+'.0f'
- else:
- digits = -int(power)
- format = '%'+`digits+2`+'.'+`digits`+'f'
- ticks = []
- t = -grid*Numeric.floor(-lower/grid)
- while t <= upper:
- ticks.append(t, format % (t,))
- t = t + grid
- return ticks
-
- _multiples = [(2., Numeric.log10(2.)), (5., Numeric.log10(5.))]
-
- def redraw(self,dc=None):
- if self.last_draw is not None:
- apply(self.draw, self.last_draw + (dc,))
-
- def clear(self):
- self.canvas.delete('all')
-
-#
-# Now a sample implementation using the above...
-#
-
-if __name__ == '__main__':
-
- class AppFrame(wx.wxFrame):
- def __init__(self, parent, id, title):
- wx.wxFrame.__init__(self, parent, id, title,
- wx.wxPyDefaultPosition, wx.wxSize(400, 400))
-
- # Now Create the menu bar and items
- self.mainmenu = wx.wxMenuBar()
-
- menu = wx.wxMenu()
- menu.Append(200, '&Print...', 'Print the current plot')
- wx.EVT_MENU(self, 200, self.OnFilePrint)
- menu.Append(209, 'E&xit', 'Enough of this already!')
- wx.EVT_MENU(self, 209, self.OnFileExit)
- self.mainmenu.Append(menu, '&File')
-
- menu = wx.wxMenu()
- menu.Append(210, '&Draw', 'Draw plots')
- wx.EVT_MENU(self,210,self.OnPlotDraw)
- menu.Append(211, '&Redraw', 'Redraw plots')
- wx.EVT_MENU(self,211,self.OnPlotRedraw)
- menu.Append(212, '&Clear', 'Clear canvas')
- wx.EVT_MENU(self,212,self.OnPlotClear)
- self.mainmenu.Append(menu, '&Plot')
-
- menu = wx.wxMenu()
- menu.Append(220, '&About', 'About this thing...')
- wx.EVT_MENU(self, 220, self.OnHelpAbout)
- self.mainmenu.Append(menu, '&Help')
-
- self.SetMenuBar(self.mainmenu)
-
- # A status bar to tell people what's happening
- self.CreateStatusBar(1)
-
- self.client = PlotCanvas(self)
-
- def OnFilePrint(self, event):
- d = wx.wxMessageDialog(self,
-"""As of this writing, printing support in wxPython is shaky at best.
-Are you sure you want to do this?""", "Danger!", wx.wxYES_NO)
- if d.ShowModal() == wx.wxID_YES:
- psdc = wx.wxPostScriptDC("out.ps", wx.TRUE, self)
- self.client.redraw(psdc)
-
- def OnFileExit(self, event):
- self.Close()
-
- def OnPlotDraw(self, event):
- self.client.draw(InitObjects(),'automatic','automatic');
-
- def OnPlotRedraw(self,event):
- self.client.redraw()
-
- def OnPlotClear(self,event):
- self.client.last_draw = None
- dc = wx.wxClientDC(self.client)
- dc.Clear()
-
- def OnHelpAbout(self, event):
- about = wx.wxMessageDialog(self, __doc__, "About...", wx.wxOK)
- about.ShowModal()
-
- def OnCloseWindow(self, event):
- self.Destroy()
-
- def InitObjects():
- # 100 points sin function, plotted as green circles
- data1 = 2.*Numeric.pi*Numeric.arange(200)/200.
- data1.shape = (100, 2)
- data1[:,1] = Numeric.sin(data1[:,0])
- markers1 = PolyMarker(data1, color='green', marker='circle',size=1)
-
- # 50 points cos function, plotted as red line
- data1 = 2.*Numeric.pi*Numeric.arange(100)/100.
- data1.shape = (50,2)
- data1[:,1] = Numeric.cos(data1[:,0])
- lines = PolyLine(data1, color='red')
-
- # A few more points...
- pi = Numeric.pi
- markers2 = PolyMarker([(0., 0.), (pi/4., 1.), (pi/2, 0.),
- (3.*pi/4., -1)], color='blue',
- fillcolor='green', marker='cross')
-
- return PlotGraphics([markers1, lines, markers2])
-
-
- class MyApp(wx.wxApp):
- def OnInit(self):
- frame = AppFrame(wx.NULL, -1, "wxPlotCanvas")
- frame.Show(wx.TRUE)
- self.SetTopWindow(frame)
- return wx.TRUE
-
-
- app = MyApp(0)
- app.MainLoop()
projects / wxWidgets.git / blobdiff