How could work the ScrollableControl class?

Frankie D. · Joined: 08 Aug 2007 Posts: 1

Hi,

I have a control class („Diagram”) inherited from ScrollableControl. My
Diagram contains thousends of „DiagramItem” inherited from Control class.
DiagramItems are not overlapped, are strored in a two-dimensional array and
their layout is regular. The location of DiagramItems are determined by its
index in the array.

I think the original class in the CF checks the location of all the controls
wether they are in the display rectangle or not. This is unnecessary and two
slow in this environment. I want to speed up scrolling by developing custom
ScrollableControl class inherited from System.Windows.Form.Control.

It is not clear for me how could work the orginal ScrollableControl class?
How can I build up the OnPaint method of „Diagram” using the OnPaint method
of DiagramItems?

Please help!

Thanks

Frankie

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