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101 lines
2.1 KiB
Python
101 lines
2.1 KiB
Python
#!/usr/bin/env python
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"""
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This demonstrates how to use FloatCanvas with a coordinate system where
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X and Y have different scales. In the example, a user had:
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X data in the range: 50e-6 to 2000e-6
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Y data in the range: 0 to 50000
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-chb
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"""
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import wx
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## import the installed version
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from wx.lib.floatcanvas import NavCanvas, FloatCanvas
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## import a local version
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#import sys
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#sys.path.append("..")
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#from floatcanvas import NavCanvas, FloatCanvas
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import numpy as N
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def YScaleFun(center):
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"""
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function that returns a scaling vector to scale y data to same range as x data
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"""
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# center gets ignored in this case
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return N.array((5e7, 1), N.float)
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class DrawFrame(wx.Frame):
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"""
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A frame used for the FloatCanvas Demo
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"""
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def __init__(self, *args, **kwargs):
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wx.Frame.__init__(self, *args, **kwargs)
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self.CreateStatusBar()
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# Add the Canvas
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Canvas = NavCanvas.NavCanvas(self,-1,
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size = (500,500),
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ProjectionFun = YScaleFun,
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Debug = 0,
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BackgroundColor = "DARK SLATE BLUE",
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).Canvas
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self.Canvas = Canvas
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Point = N.array((50e-6, 0))
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Size = N.array(( (2000e-6 - 5e-6), 50000))
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Box = Canvas.AddRectangle(Point,
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Size,
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FillColor = "blue"
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)
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Canvas.AddText("%s"%(Point,), Point, Position="cr")
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Canvas.AddPoint(Point, Diameter=3, Color = "red")
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Point = Point + Size
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Canvas.AddText("%s"%(Point,), Point, Position="cl")
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Canvas.AddPoint(Point, Diameter=3, Color = "red")
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self.Canvas.Bind(FloatCanvas.EVT_MOTION, self.OnMove)
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self.Show()
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Canvas.ZoomToBB()
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def OnMove(self, event):
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"""
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Updates the status bar with the world coordinates
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"""
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self.SetStatusText("%.2g, %.2g"%tuple(event.Coords))
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app = wx.App(False)
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F = DrawFrame(None, title="FloatCanvas Demo App", size=(700,700) )
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app.MainLoop()
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