[wxPython-users] Graphics context Docs

[Christopher Barker]

Christopher Barker wrote:
> Dj Gilcrease wrote:
>> Actually it shouldnt be any harder then drawing your line since you
>> have to create a path for your line anyways, you just use FillPath
>> instead of DrawPath
> =

> Is it really that easy? I guess I expected that a path that was just a =

> poly-line had no area, and thus no fill -- but I guess it's time to =

> experiment.

I've experimented, and alas, I was right -- you need some area to your =

path in order to fill it. I did get it to work by drawing a =

parallelogram, but it's sure more work than if you could jsut make a =

path and stroke it with a GradientPen.

Oh Well,

-Chris

Test Code enclosed for anyone curious.


-- =

Christopher Barker, Ph.D.
Oceanographer

NOAA/OR&R/HAZMAT         (206) 526-6959   voice
7600 Sand Point Way NE   (206) 526-6329   fax
Seattle, WA  98115       (206) 526-6317   main reception
-------------- next part --------------
#/usr/bin/env python

"""
A simmple test for GraphicsContext

"""
import wx

class MyFrame(wx.Frame):
    def __init__(self, *args, **kwargs):
        wx.Frame.__init__(self, *args, **kwargs)
        =

        self.Bind(wx.EVT_PAINT, self.OnPaint)
        =

    def OnPaint(self, evt):
        print "In OnPaint"
        =

        DC =3D wx.PaintDC(self)
        self.Draw(DC)
    =

    def Draw(self, DC):
        print "In Draw"
        DC.SetBackground(wx.Brush("White"))
        DC.Clear()
        =

        GC =3D wx.GraphicsContext.Create(DC)
        =

        Pen =3D GC.CreatePen(wx.Pen("Black", 4))
        =

        GC.SetPen(Pen)
        GC.DrawLines([(0,0),(100,100),(300,100)])
        GC.SetPen(wx.TRANSPARENT_PEN)
        c1 =3D wx.Color(255, 0, 0, 255)
        c2 =3D wx.Color(255, 0, 0, 0)
        Brush =3D GC.CreateLinearGradientBrush(20, 150, 300, 150, c1, c2)
        GC.SetBrush(Brush)
        GC.DrawRectangle(20, 150, 200, 1)
        =

        Path =3D GC.CreatePath()
        Path.MoveToPoint(0,0)
        Path.AddLineToPoint(500,300)
        Path.AddLineToPoint(500,298)
        Path.AddLineToPoint(0,-2)
        =

        GC.SetPen(wx.Pen("Blue", 3))
        #GC.SetBrush(wx.Brush("Red"))
        #GC.DrawPath(Path)
        Brush =3D GC.CreateLinearGradientBrush(-2, -2, 500, 300, c1, c2)
        GC.SetBrush(Brush)
        GC.FillPath(Path)
        =

A =3D wx.App(0)
F =3D MyFrame(None)
F.Show()
A.MainLoop()


        =

       =20