Graphic « JPanel « Java Swing Q&A





1. Graphic with a JPanel    coderanch.com

2. Drawing in Graphic-Context of a JPanel in a JPanel    coderanch.com

I have a Panel that has a Panel inside (to get some inset in my Panel.) The problem is, that it just works, if I draw into the main Panel. If I try to get the Graphic context of my other JPanel and write into it, I just see my drawing for breaks of seconds when I rezise the Frame (where ...

3. Making a graphic vanish when reaching the top of a frame/panel    coderanch.com

Hi all, If I have a simple animation where a ball/shape moves up and down the screen, then, rather than stop it at the top of the screen or let it move off the screen, how would I simply make it vanish when the top of the shape hits the top of the frame. As it is moving, I am already ...

4. Defining the exact bottom of panel for graphic component    coderanch.com

Hi all. If I have a JFrame object and it's size has been set to a frameWidth of 300 and a frameHeight of 500 and I have a ball (circle) with radius 20 then I intend to draw the circle on the frame using the following g.drawOval(x,y,radius*2,radius*2) I wish my circle to always be placed "sitting" at the bottom of the ...

5. Graphic JButon on JPanel    coderanch.com

Yes, I meant paintComponent() (my bad). I wasn't calling super.paint( g ), but now that I do, it crashes (actually, it goes into an endless loop of calling paintComponent() over and over again. If I didn't kill it, I assume it would eventually crash). Here is the code, as requested. super.paint( g ); // do we even need to render? if( ...

6. adding graphic objects to JPanel    coderanch.com

Dear JavaRanch, i recently stepped into the world of java programming leaving my short by enjoyable Python roots behind. it was not long untill i started to bump into difficulties. like now for instance, i'm trying to make a ball appear on mouseclick that circles around the cursor. now i got 2 things that i cant stand. 1, the offset of ...

7. How do i add Graphic Objects to JPanel while the programm is running    coderanch.com

dear Moose Saloon members, I'm trying to create a paint like program in Java. but i cant seem to figure out how to add objects to a JPanel/JFrame on user commands (like mouseclick). any advice? do i need to make a container? oh and here is my object. package taart; import javax.swing.*; import java.awt.*; public class Skwer extends JPanel { private ...

8. JPanel draw graphic on key event    java-forums.org

Hi I am trying to adapt some code I found regarding drawing lines on keyevents. I took it from an applet. Now I want to do a similar class extended on a JPanel, I have the following code: Java Code: import java.awt.Color; import java.awt.Graphics; import java.awt.Image; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import javax.swing.JPanel; public class drawtest extends JPanel implements KeyListener { private ...





10. jpanel findComponentAt but only if graphic    forums.oracle.com

Hey. I am wondering if there is a solution for getting the component at the giving coordinates that has graphics at that location. Currently (JPanel).findComponentAt(X, Y) gives the top most container, that is on that coordinate, but what if i just want the top most container, that has graphics at that location? Lets say that i have a JPanel, with opaque ...