How to paint in Component Graphics?

[VideoProcessor]

Does anyone have a solution for painting in components without overwriting
the paint-Method?

I can access a component'g Graphics-Object by

Component abc;
....
Graphics g = abc.getGraphics();



Then I'm able to paint in it:

g.drawRect(10, 10, 20, 20);



.... and paint it in the component:

abc.paint(g);



The problem to solve is that after updating the component, the rect is not
visible, because it's not in the component graphics. Is there any way to do
this without overwriting the component? Or a way to send a notice that the
component graphic was updated so that I can repaint the rect immediately?

 

[Andrei Kouznetsov]

Does anyone have a solution for painting in components without overwriting

the paint-Method?

I can access a component'g Graphics-Object by

Component abc;
...
Graphics g = abc.getGraphics();



Then I'm able to paint in it:

g.drawRect(10, 10, 20, 20);



... and paint it in the component:

abc.paint(g);



The problem to solve is that after updating the component, the rect is not
visible, because it's not in the component graphics. Is there any way to do
this without overwriting the component? Or a way to send a notice that the
component graphic was updated so that I can repaint the rect immediately?

why you don't want to overwrite paint?

 

[VideoProcessor]

why you don't want to overwrite paint?

Beacause I can't access the code ... ;-)
It's the visual component of a jmf video player and I have to mark some
regions in it.
Maybe any other idea for doing this?

 

[Andrew Thompson]

Does anyone have a solution for painting in components ..

What Components? Swing or AWT? (Or other?)
<http://www.physci.org/guifaq.jsp#2.4>

Note also, better group for GUI matters is..

...without overwriting ..

Ir is 'overide/overiding', not 'overwrite/overwriting'.

..the paint-Method?

...possibly paintComponent, depends on the code you did not supply.
<http://www.physci.org/codes/sscce.jsp>

 

[Andrew Thompson]

It's the visual component of a jmf video player and I have to mark some
regions in it.

Get the graphics of the video player and render them to
the Graphics of a BufferedImage, paint your rectangle on
same, paint BufferedImage ( quickly ;-).

 

[Chris Uppal]

Beacause I can't access the code ... ;-)
It's the visual component of a jmf video player and I have to mark some
regions in it.

I've never tried this myself, so I may be completely wrong, but it sounds as if
a "glass pane" might be a potential solution. There's a description in the
Swing tutorial at:

http://java.sun.com/docs/books/tutorial/uiswing/components/rootpane.html#glasspane

-- chris

 

[Andrei Kouznetsov]

Beacause I can't access the code ... ;-)

It's the visual component of a jmf video player and I have to mark some
regions in it.
Maybe any other idea for doing this?

put your video player into some component with glassPane (JFrame for
example) and paint whatever you need on glassPane.

 

[VideoProcessor]

put your video player into some component with glassPane (JFrame for
example) and paint whatever you need on glassPane.

I tried to, but it seems as if the glassPane is still under the visual
component of the player.

 

[Andrei Kouznetsov]

I tried to, but it seems as if the glassPane is still under the visual

component of the player.

this say us that the player is a heavyweight component!
and you have a big problem.

However I yet don't understand why you cant extend your player and write
something like this:
class MyPlayer extends VideoPlayer {

public void paint(Graphics g) {
super.paint(g);
//draw here whatever you want
}

If player is final class then use reflection to make it not final and
create/compile MyPlayer on the fly at run time.

 

[Andrei Kouznetsov]

put your video player into some component with glassPane (JFrame for

I tried to, but it seems as if the glassPane is still under the visual
component of the player.

dont use glassPane, use one Component for every your drawing and place it
over your player!