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Bas
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Box fill colors not correct
Apr 14th, 2006 at 8:33am
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Hi,

I am using Delphi 2005 and FlowChartX 4.0.1. When I drop a new TFlowChart on my form, and set the BoxFillColor property to clTeal, a box is displayed with the correct color.

When I do the same thing with several other colors, for example clInactiveCaption, the box will always be displayed with a black color.

This goes for fsSolid, fsGradientH and fsGradientV modes.

The same goes for BoxFillColor2, when used as a gradient. The entire box is black.

I hope this can be fixed in a future version.
  
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Stoyo
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Re: Box fill colors not correct
Reply #1 - Apr 14th, 2006 at 12:12pm
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Hi, We'll look into that next week.
  
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Bas
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Re: Box fill colors not correct
Reply #2 - Apr 16th, 2006 at 6:46am
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Nice, thanks!
  
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Stoyo
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Re: Box fill colors not correct
Reply #3 - Apr 21st, 2006 at 6:31am
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Hi,

We have tried that with Delphi 6 and all these UI element colors seem to work fine. We don't have Delphi 2005 - could you email us a compiled .exe that displays a flowchart and a button, and upon clicking the button sets fc.BoxFillColor to clInactiveCaption. We will trace through the property setter and see exactly what value is passed to it.

Thanks,
Stoyan
  
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Bas
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Re: Box fill colors not correct
Reply #4 - Apr 21st, 2006 at 9:17am
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I just sent you an email with a demo project, incl. source. One important thing I just noticed is that this bug only occurs in GDI+ mode. In classic everything works fine.

You can test this yourself by launching the Project1.exe, create a box in the Flowchart, and click the button to switch to GDI+ mode.

Hope this helps. If you need anything else please let me know.
  
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Bas
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Re: Box fill colors not correct
Reply #5 - Apr 25th, 2006 at 5:58am
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Hi, were you able to reproduce this behaviour?
  
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Stoyo
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Re: Box fill colors not correct
Reply #6 - Apr 25th, 2006 at 7:55am
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Yes, that constant seems to specify an index in the system color palette, and GDI+ cannot work with such indices directly. We will have to implement lookup for the RGB values of a color in the palette and use them instead of the OLE_COLOR index value.
  
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Re: Box fill colors not correct
Reply #7 - Apr 26th, 2006 at 1:54pm
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Tough luck with that - the control already uses OleTranslateColor/GetSysColor APIs to get the RGB values for OLE_COLOR system palette indices, which are encoded as 0x800000xx where xx is the index. The UI-color constants in Delphi are in that form, but for some of them those APIs return an E_INVALIDARG error code. Our developers think Delphi probably extends the OLE_COLOR semantics with its own palette implementation, but unfortunately we don't know how to get the actual RGB values from an index in that case. Try getting the actual R/G/B values using some Delphi function and assign them to the BoxFillColor instead of directly assigning the TColor constant.

The problem also happens when using the classic drawing API.

Stoyan
  
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