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#!/usr/bin/env python
"""
A small demo of how to use Groups of Objects
"""
import wx
## import the installed version
from wx.lib.floatcanvas import NavCanvas, FloatCanvas
## import a local version
#import sys
#sys.path.append("..")
#from floatcanvas import NavCanvas, FloatCanvas
class DrawFrame(wx.Frame):
"""
A frame used for the FloatCanvas Demo
"""
def __init__(self, *args, **kwargs):
wx.Frame.__init__(self, *args, **kwargs)
self.CreateStatusBar()
# Add the Canvas
NC = NavCanvas.NavCanvas(self,-1,
size = (500,500),
ProjectionFun = None,
Debug = 0,
BackgroundColor = "DARK SLATE BLUE",
)
Canvas = NC.Canvas
self.Canvas = Canvas
self.Canvas.Bind(FloatCanvas.EVT_MOTION, self.OnMove)
Point = (45,40)
## create a few Objects:
C = FloatCanvas.Circle((0, 0), 10, FillColor="Red")
R = FloatCanvas.Rectangle((5, 5),(15, 8), FillColor="Blue")
E = FloatCanvas.Ellipse((1.5, 1.5), (12, 8), FillColor="Purple")
C2 = FloatCanvas.Circle((0, 5), 10, FillColor="cyan")
T = FloatCanvas.Text("Group A", (5.5, 5.5), Position="cc", Size = 16, Weight=wx.BOLD, Family=wx.SWISS)
self.GroupA = FloatCanvas.Group((R,C,E))
self.GroupA.AddObjects((C2,T))
Canvas.AddObject(self.GroupA)
## create another Groups of objects
R = FloatCanvas.Rectangle((15, 15),(10, 18), FillColor="orange")
E = FloatCanvas.Ellipse((22, 28), (12, 8), FillColor="yellow")
C = FloatCanvas.Circle((25, 20), 15, FillColor="Green")
C2 = FloatCanvas.Circle((12, 22), 10, FillColor="cyan")
T = FloatCanvas.Text("Group B", (19, 24), Position="cc", Size = 16, Weight=wx.BOLD, Family=wx.SWISS)
self.GroupB = FloatCanvas.Group((R,E,C,C2,T))
Canvas.AddObject(self.GroupB)
self.Groups = {"A":self.GroupA, "B":self.GroupB}
# Add a couple of tools to the Canvas Toolbar
tb = NC.ToolBar
# tb.AddSeparator()
for Group in self.Groups:
Button = wx.Button(tb, wx.ID_ANY, "Remove %s"%Group)
tb.AddControl(Button)
Button.Bind(wx.EVT_BUTTON, lambda evt, group=Group: self.RemoveGroup(evt, group))
Button = wx.Button(tb, wx.ID_ANY, "Replace%s"%Group)
tb.AddControl(Button)
Button.Bind(wx.EVT_BUTTON, lambda evt, group=Group: self.ReplaceGroup(evt, group))
tb.Realize()
self.Show()
Canvas.ZoomToBB()
def OnMove(self, event):
"""
Updates the status bar with the world coordinates of the mouse position
"""
self.SetStatusText("%.2f, %.2f"%tuple(event.Coords))
def RemoveGroup(self, evt, group=""):
print("removing group:", group)
G = self.Groups[group]
self.Canvas.RemoveObject(G)
self.Canvas.Draw(Force=True)
def ReplaceGroup(self, evt, group=""):
print("replacing group:", group)
G = self.Groups[group]
self.Canvas.AddObject(G)
self.Canvas.Draw(Force=True)
app = wx.App(False)
F = DrawFrame(None, title="FloatCanvas Demo App", size=(700,700) )
app.MainLoop()
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