CODEWITHSUNDEEP
javaswingcenterjinternalframejdesktoppane
Steven
Steven

Reputation: 928

How do I open a JInternalFrame centered in a JDesktopPane?

I am adding a bunch of JInternalFrames into a JDesktopPane, as the user selects to open various features through the menus. But I would like the internal frames to open centered in the desktop pane, as opposed to the upper left, where they seem to default.

How can I specify that the JInternalFrames open centered, or move them to the center after opening?

jDesktopPane.add(jInternalFrame); // jInternalFrame is not centered!

Upvotes: 8

Views: 25366

Answers (6)

Jorge Jhovani Valverde León
Jorge Jhovani Valverde León

Reputation: 195

this Align in Event ... don't forget

enter code here
private void jMenuItem_nuevo_usuarioActionPerformed(java.awt.event.ActionEvent evt) {                                                        
    // TODO add your handling code here:
    UsuariosJInternalFrame internalUsuario = new UsuariosJInternalFrame();
    jDesktopPane_menu.add(internalUsuario);

    Dimension desktopSize = jDesktopPane_menu.getSize();
    Dimension FrameSize = internalUsuario.getSize();
    internalUsuario.setLocation((desktopSize.width - FrameSize.width) / 2, (desktopSize.height - FrameSize.height) / 2);

    internalUsuario.setVisible(true);

}

Upvotes: 0

evening_g
evening_g

Reputation: 173

Add this void

public void addCentered(Component jif) {        
    desktopPane.add(jif);
    jif.setLocation((desktopPane.getWidth()-jif.getWidth())/2, (desktopPane.getHeight()-jif.getHeight())/2);
    jif.setVisible(true);
}

and when adding the jInternalFrame call:

addCentered(jifName);

Upvotes: 0

compt
compt

Reputation: 80

If you are using Netbeans (which is recommended for desktop apps) you just need to:

  1. Select the form, right click and then properties;
  2. Go to code tab;
  3. Change "Form size policy" from "Generate Pack()" to "Generate Resize Code";
  4. Form Position (option above Form size policy) will be available.

Now you can set the for position as you wish :)

Upvotes: 1

Steven
Steven

Reputation: 928

For reference, here is the solution I used, based on dogbane's advice:

Dimension desktopSize = desktopPane.getSize();
Dimension jInternalFrameSize = jInternalFrame.getSize();
jInternalFrame.setLocation((desktopSize.width - jInternalFrameSize.width)/2,
    (desktopSize.height- jInternalFrameSize.height)/2);

Upvotes: 16

piepera
piepera

Reputation: 2113

I would suggest the Window.setLocationRelativeTo(Component) method, which will center the window relative to a specified component. Instead of passing in a JDesktopPane, you might want to obtain the parent frame for a component, since otherwise, your JInternalFrame will be centered according to whichever component you pass in.

Here is a code sample:

private void showDialog(Dialog dialogToCenter, Component button) {
    Frame frame = JOptionPane.getFrameForComponent(button);
    dialogToCenter.setLocationRelativeTo(frame);
    dialogToCenter.setVisible(true);
}

Upvotes: 0

dogbane
dogbane

Reputation: 274788

Work out the top-left corner of the new location (based on the size of the JDesktopPane and JInternalFrame) and then call JInternalFrame.setLocation.

Upvotes: 4

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