Python - Polymorphism in wxPython, What's wrong?
- by Wallter
I am trying to wright a simple custom button in wx.Python. My code is as follows, an error is thrown on line 19 of my "Custom_Button.py" - What is going on? I can find no help online for this error and have a suspicion that it has to do with the Polymorphism. (As a side note: I am relatively new to python having come from C++ and C# any help on syntax and function of the code would be great! - knowing that, it could be a simple error. thanks!)
Error
def __init__(self, parent, id=-1, NORM_BMP, PUSH_BMP, MOUSE_OVER_BMP, **kwargs):
SyntaxError: non-default argument follows default argument
Main.py
class MyFrame(wx.Frame):
def __init__(self, parent, ID, title):
wxFrame.__init__(self, parent, ID, title,
wxDefaultPosition, wxSize(400, 400))
self.CreateStatusBar()
self.SetStatusText("Program testing custom button overlays")
menu = wxMenu()
menu.Append(ID_ABOUT, "&About", "More information about this program")
menu.AppendSeparator()
menu.Append(ID_EXIT, "E&xit", "Terminate the program")
menuBar = wxMenuBar()
menuBar.Append(menu, "&File");
self.SetMenuBar(menuBar)
self.Button1 = Custom_Button(self, parent, -1,
"D:/Documents/Python/Normal.bmp",
"D:/Documents/Python/Clicked.bmp",
"D:/Documents/Python/Over.bmp",
"None", wx.Point(200,200), wx.Size(300,100))
EVT_MENU(self, ID_ABOUT, self.OnAbout)
EVT_MENU(self, ID_EXIT, self.TimeToQuit)
def OnAbout(self, event):
dlg = wxMessageDialog(self, "Testing the functions of custom "
"buttons using pyDev and wxPython",
"About", wxOK | wxICON_INFORMATION)
dlg.ShowModal()
dlg.Destroy()
def TimeToQuit(self, event):
self.Close(true)
class MyApp(wx.App):
def OnInit(self):
frame = MyFrame(NULL, -1, "wxPython | Buttons")
frame.Show(true)
self.SetTopWindow(frame)
return true
app = MyApp(0)
app.MainLoop()
Custom Button
import wx
from wxPython.wx import *
class Custom_Button(wx.PyControl):
############################################
##THE ERROR IS BEING THROWN SOME WHERE IN HERE ##
############################################
# The BMP's
Mouse_over_bmp = wx.Bitmap(0) # When the mouse is over
Norm_bmp = wx.Bitmap(0) # The normal BMP
Push_bmp = wx.Bitmap(0) # The down BMP
Pos_bmp = wx.Point(0,0) # The posisition of the button
def __init__(self, parent, id=-1, NORM_BMP, PUSH_BMP, MOUSE_OVER_BMP, text="",
pos, size, **kwargs):
wx.PyControl.__init__(self,parent, id, **kwargs)
# Set the BMP's to the ones given in the constructor
self.Mouse_over_bmp = wx.Bitmap(MOUSE_OVER_BMP)
self.Norm_bmp = wx.Bitmap(NORM_BMP)
self.Push_bmp = wx.Bitmap(PUSH_BMP)
self.Pos_bmp = pos
############################################
##THE ERROR IS BEING THROWN SOME WHERE IN HERE ##
############################################
self.Bind(wx.EVT_LEFT_DOWN, self._onMouseDown)
self.Bind(wx.EVT_LEFT_UP, self._onMouseUp)
self.Bind(wx.EVT_LEAVE_WINDOW, self._onMouseLeave)
self.Bind(wx.EVT_ENTER_WINDOW, self._onMouseEnter)
self.Bind(wx.EVT_ERASE_BACKGROUND,self._onEraseBackground)
self.Bind(wx.EVT_PAINT,self._onPaint)
self._mouseIn = self._mouseDown = False
def _onMouseEnter(self, event):
self._mouseIn = True
def _onMouseLeave(self, event):
self._mouseIn = False
def _onMouseDown(self, event):
self._mouseDown = True
def _onMouseUp(self, event):
self._mouseDown = False
self.sendButtonEvent()
def sendButtonEvent(self):
event = wx.CommandEvent(wx.wxEVT_COMMAND_BUTTON_CLICKED, self.GetId())
event.SetInt(0)
event.SetEventObject(self)
self.GetEventHandler().ProcessEvent(event)
def _onEraseBackground(self,event):
# reduce flicker
pass
def _onPaint(self, event):
dc = wx.BufferedPaintDC(self)
dc.SetFont(self.GetFont())
dc.SetBackground(wx.Brush(self.GetBackgroundColour()))
dc.Clear()
dc.DrawBitmap(self.Norm_bmp)
# draw whatever you want to draw
# draw glossy bitmaps e.g. dc.DrawBitmap
if self._mouseIn: # If the Mouse is over the button
dc.DrawBitmap(self, self.Mouse_over_bmp, self.Pos_bmp, useMask=False)
if self._mouseDown: # If the Mouse clicks the button
dc.DrawBitmap(self, self.Push_bmp, self.Pos_bmp, useMask=False)
