== Introduction ==

The "Hello, World" of drawing on windows.

== What Objects are Involved? ==

 * wx.PaintDC - DeviceContext to draw on, in response to EVT_PAINT.
 * wx.Pen - Pen to draw with.

== Process Overview ==

Draw on a wx.PaintDC with a wx.Pen in response to wx.EVT_PAINT.

== Special Concerns ==

Read more RecipesImagesAndGraphics to learn more and extend beyond the limit.

== Code Sample ==

{{{
#!/usr/bin/env python
import wx

class DrawPanel(wx.Frame):

    """Draw a line to a panel."""

    def __init__(self):
        wx.Frame.__init__(self, title="Draw on Panel")
        self.Bind(wx.EVT_PAINT, self.OnPaint)

    def OnPaint(self, event=None):
        dc = wx.PaintDC(self)
        dc.Clear()
        dc.SetPen(wx.Pen(wx.BLACK, 4))
        dc.DrawLine(0, 0, 50, 50)

app = wx.App(False)
frame = DrawPanel()
frame.Show()
app.MainLoop()
}}}

== Another Way ==

{{{
#!/usr/bin/env python
import wx

app = wx.App(False)

frame = wx.Frame(None, title="Draw on Panel")
panel = wx.Panel(frame)

def on_paint(event):
    dc = wx.PaintDC(event.GetEventObject())
    dc.Clear()
    dc.SetPen(wx.Pen("BLACK", 4))
    dc.DrawLine(0, 0, 50, 50)

panel.Bind(wx.EVT_PAINT, on_paint)

frame.Show(True)
app.MainLoop()
}}}

This doesn't create your own class, but you probably will want to. Notice that the paint function takes only one argument here, not two.


== See Also ==

 * YetAnotherDrawingSample
 * RecipesImagesAndGraphics

=== Comments ===

By LionKimbro.

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