--- /dev/null
+"""
+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
+import string
+
+# 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 / commitdiff
