On Mon, 21 Mar 2011, Alexander Klenin wrote:
2011/3/21 Michael Van Canneyt <[email protected]>:
Yes, but, how can I use a TCanvas in a CGI app?
If I write:
Chart.PaintOnCanvas(TCanvas(lCanvas), Rect(0, 0, 100, 100));
I get an Access Violation.
Of course, since you are converting an object to the type it does not belong to.
You should create a TBitmap or another similar object.
Did you look at the savedemo as I proposed in a previous mail?
Simply said: you can't.
The current TAChart is not suitable for a CGI application. It expects a GUI.
Why do you think so?
TAChart should be prefectly capable of rendering on bitmap-based canvas.
Because both TCanvas and TBitmap suppose a GUI. TFPCustomCanvas does not.
Yes, I know about the 'nogui' widgetset, and no, I don't think that's a
proper solution.
Michael.
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