How to expand/shrink glcanvas (Jogl) if the user resizes the frame?

Question

I have a glcanvas inside a jpanel with a BorderLayout. The size of the canvas should be dependent on the window size. The initial size is set via

glCanvas.setSize(640, 480);

And it is added to the panel like this

jPanel3DModel.add(Model3DCanvas.getInstance().getCanvas());
jPanelRight.add(jPanel3DModel, BorderLayout.NORTH);

However the size of the canvas is fixed and all the panels of the other components in my frame just resize.

BorderLayout.NORTH doesn't resize. Only BorderLayout.CENTER gets resized. You should use the GLJPanel, as the wiki suggests: https://jogamp.org/wiki/index.php/Using_JOGL_in_AWT_SWT_and_Swing#JOGL_in_Swing_using_the_GLJPanel — Sascha, May 14 '19 at 11:34
Ok I put the canvas into the CENTER. The Panel resizes but not the canvas. — , May 14 '19 at 16:31
What you haven't explained is the ``jPanel3DModel`` component. Because you don't add the canvas directly to the ``jPanelRight``. Therefore the resizing is dependent on the resizing behavior of the ``jPanel3DModel`` component. — Sascha, May 15 '19 at 08:49

score 0 · Answer 1 · answered May 15 '19 at 08:50

If you have to react to the JPanel resize "manually", you can use a ComponentListener as described in https://docs.oracle.com/javase/tutorial/uiswing/events/componentlistener.html

Assuming canvas is your GLCanvas and jpanel the component your canvas resizing is depending on.

jPanel.addComponentListener(new java.awt.event.ComponentAdapter() {
  public void componentResized(java.awt.event.ComponentEvent event) {
    int width=event.getComponent().getWidth();
    int height=event.getComponent().getHeight();
    canvas.setSize(width,height);
  }
});

How to expand/shrink glcanvas (Jogl) if the user resizes the frame?

1 Answers1