Home » Eclipse Projects » GEF » opaque figure/shape
| opaque figure/shape [message #103412] |
Tue, 04 November 2003 13:44  |
Eclipse User |
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Originally posted by: nospam.gmx.net
This is a multi-part message in MIME format.
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Hello Group!
i have some problems with the "opaque"-ness of a figure.
As a figure for my editpart, i wrote a class extending rectangleFigure =
(which itselfs extends shape) and i override the method fillShape() with =
something like graphics.fillRectangle(....)
This works pretty fine, the rectangle appears in the background, =
although, it is not opaque but half-transparent.
The method isOpaque() of the class shape is implemented with "return =
false".
Overriding it with the code of the superclass Figure has no effect.
Anybody an idea of how to getting this figure opaque?
Thanx, Ingo
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 5.50.4933.1800" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Hello Group!</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>i have some problems with the =
"opaque"-ness of a=20
figure.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>As a figure for my editpart, i =
wrote a class=20
</FONT><FONT face=3DArial size=3D2>extending=20
<U><STRONG>rectangleFigure</STRONG></U> (which itselfs extends=20
<STRONG>shape</STRONG>) and i override the </FONT><FONT face=3DArial =
size=3D2>method=20
<FONT size=3D2>fillShape() with something like g<FONT=20
size=3D2>raphics.fillRectangle(....)</FONT></FONT></FONT ></DIV>
<DIV><FONT face=3DArial size=3D2>This works pretty fine, the rectangle =
appears in=20
the background, although, it is not opaque but =
half-transparent.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>The method isOpaque() of the class =
<STRONG>shape</STRONG> is implemented with "return=20
false".</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Overriding it with the code of the =
superclass=20
<STRONG>Figure</STRONG> has no effect.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Anybody an idea of how to getting =
this figure=20
opaque?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Thanx, Ingo</FONT></DIV></BODY></HTML>
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| Re: opaque figure/shape [message #103517 is a reply to message #103412] |
Wed, 05 November 2003 01:09  |
 Pratik Shah
Messages: 1077
Registered: July 2009 |
Senior Member |
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> As a figure for my editpart, i wrote a class extending rectangleFigure
(which itselfs extends shape)
> and i override the method fillShape() with something like
graphics.fillRectangle(....)
What exactly are you trying to do? How is your Figure similar to a Shape,
but different from a RectangleFigure? Can you tell us what exactly you are
doing in the overridden fillShape() method? I am sure you know that
fillShape() in RectangleFigure already does a
graphics.fillRectangle(getBounds()).
> This works pretty fine, the rectangle appears in the background, although,
it is not opaque but half-transparent.
> The method isOpaque() of the class shape is implemented with "return
false".
> Overriding it with the code of the superclass Figure has no effect.
You need to call setOpaque(true) to make the Figure opaque. This, however,
doesn't apply to Shapes, and I don't think it's the problem here. What
Color are you using as the background? And how do you set it? Do you
override any other methods, like paintFigure()? Can you provide a
screenshot to show what exactly you mean when you say half-transparent? You
don't have the XORs on by any chance, do you?
Pratik Shah
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| Re: opaque figure/shape [message #103572 is a reply to message #103517] |
Wed, 05 November 2003 07:21 |
| Eclipse User |
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Originally posted by: nospam.gmx.net
Hello,
q: have you tried overriding it and returning true?
a. i did, with no effect
q: What exactly are you trying to do? How is your Figure similar to a
Shape,
but different from a RectangleFigure? Can you tell us what exactly you
are
doing in the overridden fillShape() method? I am sure you know that
fillShape() in RectangleFigure already does a
graphics.fillRectangle(getBounds()).
a: yes i do know. the fillShape method does only this:
graphics.setBackgroundColor(bgColor);
graphics.setForegroundColor(bgColor);
graphics.fillRectangle(getBounds().getExpanded(-10,-10));
q:You need to call setOpaque(true) to make the Figure opaque. This,
however,
doesn't apply to Shapes,
a: As i mentioned, setOpaque has no effect... even when i override
isOpaque().
Why doesn
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| Re: opaque figure/shape [message #103586 is a reply to message #103572] |
Wed, 05 November 2003 07:38 |
| Eclipse User |
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Originally posted by: nospam.gmx.net
Ok, solved the problem.
The canvasfigure has caused the trouble!
Anyway, thanx for the replies!
<nospam@gmx.net> wrote in message news:boa8ai$a5c$1@eclipse.org...
> Hello,
>
> q: have you tried overriding it and returning true?
> a. i did, with no effect
>
> q: What exactly are you trying to do? How is your Figure similar to a
> Shape,
> but different from a RectangleFigure? Can you tell us what exactly
you
> are
> doing in the overridden fillShape() method? I am sure you know that
> fillShape() in RectangleFigure already does a
> graphics.fillRectangle(getBounds()).
>
> a: yes i do know. the fillShape method does only this:
> graphics.setBackgroundColor(bgColor);
> graphics.setForegroundColor(bgColor);
> graphics.fillRectangle(getBounds().getExpanded(-10,-10));
>
> q:You need to call setOpaque(true) to make the Figure opaque. This,
> however,
> doesn't apply to Shapes,
> a: As i mentioned, setOpaque has no effect... even when i override
> isOpaque().
> Why doesn
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| Re: opaque figure/shape [message #103761 is a reply to message #103586] |
Wed, 05 November 2003 22:17 |
Pratik Shah
Messages: 1077
Registered: July 2009 |
Senior Member |
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Can you post what the problem was and how you solved it? That way, anybody
else having a similar problem will know of something to lookout for.
Just as a suggestion, I don't think you need to override RectangleFigure to
do what you are doing (as far as I can tell from what you have posted so
far). You might want to try something like this instead:
IFigure rect = new RectangleFigure();
rect.setBorder(new MarginBorder(10));
rect.setBackgroundColor(ColorConstants.blue);
rect.setForegroundColor(ColorConstants.blue);
Pratik Shah
<nospam@gmx.net> wrote in message news:boa9b1$b03$1@eclipse.org...
> Ok, solved the problem.
> The canvasfigure has caused the trouble!
>
> Anyway, thanx for the replies!
>
>
>
>
> <nospam@gmx.net> wrote in message news:boa8ai$a5c$1@eclipse.org...
> > Hello,
> >
> > q: have you tried overriding it and returning true?
> > a. i did, with no effect
> >
> > q: What exactly are you trying to do? How is your Figure similar to a
> > Shape,
> > but different from a RectangleFigure? Can you tell us what exactly
> you
> > are
> > doing in the overridden fillShape() method? I am sure you know that
> > fillShape() in RectangleFigure already does a
> > graphics.fillRectangle(getBounds()).
> >
> > a: yes i do know. the fillShape method does only this:
> > graphics.setBackgroundColor(bgColor);
> > graphics.setForegroundColor(bgColor);
> > graphics.fillRectangle(getBounds().getExpanded(-10,-10));
> >
> > q:You need to call setOpaque(true) to make the Figure opaque. This,
> > however,
> > doesn't apply to Shapes,
> > a: As i mentioned, setOpaque has no effect... even when i override
> > isOpaque().
> > Why doesn
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