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RE: [ve-dev] Painting Custom widgets in Swing for VE .
|
Hi Rich,
Thanks for the input. But our
requirement is not just to apply a property to the whole
component .
Let us explain more
about our composite object. The
composite component has
two of the properties as
follows.
ComponentHeight
No_of_Display_Items.
The component Height is the height
of the swing widgets inside the panel . Not the height of the panel
itself.
No_of_Display_Items Specifies the number of item instances displayed for
the item ,if No_of_Display_Items is set
to 3 to , we create a TextField, by default we want
to 3 TextFields visible inside the composite component like three rows of
textField. To get only one textField, set No_of_Display_Items to 1.
The height of the panel depends on
two aspects that is No_of_Display_Items
and Component height. Depending on
the No_of_Display_Items, we duplicate the
swing widget that many number of
times inside the panel. Hence we have "No_of_Display_Items" number of rows of
the swing widget inside the panel.
You can see the example in the image
attachments with this mail.
Pic1.jpg shows a single swing widget inside the
panel.(No_of_Display_Items=1)
Pic2.jpg shows multiple swing widget inside the
panel. (No_of_Display_Items=3)
Can you please help how do I go
about implementing such a kind of task.
Thanks in
Advance,
Best Regards
Rashmi H.Ramachandra
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
Please respond
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project |
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Subject
| RE: [ve-dev] Painting
Custom widgets in Swing for VE . |
|
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 Discussions people developing code for the Visual Editor
project |
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Subject
| [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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