I'd been creating and deleting pens and colours each time round a loop to avoid
accumulations, and returned to this issue while seeking ways to speed up my
program.
My current attempt is this (with irrelevance stripped out):
local DC,P=wx.wxMemoryDC(),wx.wxPen() P:SetWidth(5) P:SetStyle(wx.wxSOLID)
DC:SelectObject(BITMAP) DC:SetPen(P) DC:SetBrush(wx.wxTRANSPARENT_BRUSH)
for N=0,255,5 do
P:SetColour(N,N,N) DC:SetPen(P) DC:DrawLine(N,0,N,100)
end
DC:SelectObject(wx.wxNullBitmap) P:delete()
DC:delete()
It works, but I'm not sure that it's safe. is P:SetColour() changing an implied
colour 'object' that would better be made explicit and assigned to a vartiable
so I can delete it along with the pen after the loop ends? The wx.chm manual
doesn't make this clear, it seems to imply that this method avoids the need for
an actual colour 'object' entirely.
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