#!/usr/bin/env python
import wx

(START,INTER,END) = xrange(3)

class Circle(object):
    def __init__(self,x,y,circleType):
        self.x = x
        self.y = y
        self.circleType = circleType

    def onPaint(self,gc,x,y):
        gc.SetPen(wx.Pen("black", 1))
        self.path = gc.CreatePath()
#       self.path.AddCircle(x+25, y+25, 25)
        self.path.AddEllipse(x, y, 50, 50)
        if self.circleType == START:
            gc.StrokePath(self.path)
        else:
#           self.path.AddCircle(x+25, y+25, 21)
            self.path.AddEllipse(x+4, y+4, 42, 42)
            if self.circleType == END:
                gc.SetBrush(wx.Brush("black"))
            else:
                gc.SetBrush(wx.TRANSPARENT_BRUSH)
            gc.DrawPath(self.path)
#           subpath = gc.CreatePath()
#           subpath.AddCircle(x+25, y+25, 21)
#           if self.circleType == END:
#               gc.SetBrush(wx.Brush("black"))
#           else:
#               gc.SetBrush(wx.TRANSPARENT_BRUSH)
#           self.path.AddPath(subpath)
#           gc.DrawPath(self.path)

    def HitTest(self,x,y):
        return self.path.Contains(x,y)

class MyPanel(wx.Panel):
    def __init__(self,frame):
        wx.Panel.__init__(self,frame,-1)
        self.obj = []
        self.currentObj = None

        self.obj.append(Circle(100,100,START))
        self.obj.append(Circle(200,100,INTER))
        self.obj.append(Circle(300,100,END))

        self.Bind(wx.EVT_PAINT,self.onPaint)
        self.Bind(wx.EVT_LEFT_DOWN,self.onLeftDown)

    def onPaint(self,evt):
        dc = wx.PaintDC(self)
        gc = wx.GraphicsContext.Create(dc)
        for obj in self.obj:
            obj.onPaint(gc,obj.x,obj.y)

    def onLeftDown(self,evt):
        self.currentObj = None
        for obj in self.obj:
            if obj.HitTest(evt.X,evt.Y):
                self.currentObj = obj
                break
        print self.currentObj

class MyFrame(wx.Frame):
    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, id, title, size=(600,400))
        self.panel = MyPanel(self)

class MyApp(wx.App):
    def OnInit(self):
        frame = MyFrame(None, -1, "BPMN Symbols")
        frame.Show(True)
        self.SetTopWindow(frame)
        return True

app = MyApp(0)     # Create an instance of the application class
app.MainLoop()     # Tell it to start processing events