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RE: [ve-dev] Painting Custom widgets in Swing for VE .
|
I think this is the wrong approach.
It should be done on the set of the property itself, not during the paint.
In the complex composite widget, when the property is set it should propagate
it down to the children. The paint handler is for doing painting not setting
properties. It is often too late, the children may of already painted.
Rich
"H Ramachandra, Rashmi"
<rashmi.h.ramachandra@xxxxxxx>
Sent by: ve-dev-bounces@xxxxxxxxxxx
11/08/2005 03:44 AM
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| RE: [ve-dev] Painting Custom
widgets in Swing for VE . |
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Hi Rich,
We are building complex
composite widgets. For Example : a single component consisting of a Text
Field and a checkbox put inside a panel. The composite component here is
the panel. When we change properties for the composite component, we want
it to reflect to the child component, which are placed inside the composite
component. Hence we require a paint method to add components and to change
properties related to the whole of the composite component.
So can you please help us resolving
this issue of paint method?
Thanks in Advance
Best Regards,
Rashmi H.Ramachandra.
From: ve-dev-bounces@xxxxxxxxxxx
[mailto:ve-dev-bounces@xxxxxxxxxxx] On Behalf Of Rich Kulp
Sent: Monday, 07 November 2005 7:57 PM
To: Discussions people developing code for the Visual Editor project
Subject: Re: [ve-dev] Painting Custom widgets in Swing for VE .
Why are you changing it in the paint itself? Why not change it directly
on the component when the property itself is changed. Then it would only
be done once.
Rich
"H Ramachandra, Rashmi"
<rashmi.h.ramachandra@xxxxxxx>
Sent by: ve-dev-bounces@xxxxxxxxxxx
11/07/2005 12:32 AM
Please respond to
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| [ve-dev] Painting Custom
widgets in Swing for VE . |
|
Hi all ,
We are using eclipse 3.1 and VE 1.1 for our
project. We are trying to build custom widgets in Swing, that paint themselves
when any property such as Color (Back Ground or Foreground) is changed.
We have two questions here,
1.) How do we debug and follow the flow of
execution? (Sysout's are not working here inside custom widgets).
2.) How do we customize the paint method to
pick up and apply property from the user defined field?
For E.g.:-
We have a field called 'backGroundColor' ,
which has a setter and getter methods. On every change of this property
by the user from the property palette. We want to change the color of the
component .
this.setBackGround(this.getBackGroundColor());
We have used the above code inside the
paint method. Since paint method is called ample number of times the eclipse
runtime hangs and becomes very slow. It even does not reflect the property
changes. Is there any way we can handle these custom properties inside
the paint method.
Our paint method looks like this
public void paint(Graphics g)
{
super.paint(g);
if(flag)
{
this.setBackground(this.getBackgroundColor());
this.setOpaque(true);
}
flag = false;
}
We used flag to restrict repainting of the
component continuously. But we are unable to find how to reset the flag
and call the paint, whenever there is a property change.
For the above component and the swing container
I am using null layout.
Any help in this regard is greatly appreciated.
Thank you and Best Regards.
Rashmi H.Ramachandra _______________________________________________
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