Click on jmenuitem open the jinternalframe..

[mcajavaprogramer]

Hi...

I m created one simple frame with menu in netbeans.
and also created jinternalframe in the same package.

whenever i clicked on menuitem Its open Jinternalframe manytimes..

for example : File menu -> File1(Menuitem)

when i click on file1 its open jinternalframe. again i click on file1 its open the new jinternalframe..
so i don't want to open new internalframe when the same frame is open.




This is my code to open jinternal frame on mouse clicked on menu.

private void Jinternalframe1_MenuMouseClicked(java.awt.event.MouseEvent evt) {
        Jinternalframe1 jn = new Jinternalframe1();
        this.desktopPane.add(jn);
        jn.show();
}

help me to open only 1 frame at a time when the jinternalframe1 are open on clicking on menuitem its doesn't open once again on click same menuitem.

Thanx
mcajavaprogramer

[mcajavaprogramer]

There is no-body who have this solution about this question..?

[shall]

What about creating a JInternalFrames class member variable. Then, in the mouse click function, only create the internal frame if the member variable is null.

Jinternalframe1 jn = null;
private void Jinternalframe1_MenuMouseClicked(java.awt.event.MouseEvent evt) {
        if (jn == null) {
           jn = new Jinternalframe1();
           this.desktopPane.add(jn);
           jn.show();
        }
}

[DarrylBurke]

First, the correct listener for a JMenuItem is ActionListener, not MouseListener.

A better programming idiom is to disable the menu item when the internal frame is opened, and enable it when the internal frame is closed. You would use an InternalFrameListener for that, probably extending InternalFrameAdapter.

Another possibility, if you want to give the user the option to close the internal frame from the menu, is to use a JCheckBoxMenuItem.

Read the API for those classes and follow any links to the Oracle tutorials on 'How to Use ...'

db

edit: You've probably already been told this, but the NetBeans (or any other) visual designer is categorically not a beginners' tool. Unless you aim to make a career out of Swing GUI design (not likely, now that JavaFX has started to take over the market) it's just not worht the time and effort to learn all its quirks. That time and effort is much better spent in reading tutorials and learning how to code a Swing GUI by hand.

[mcajavaprogramer]

First, the correct listener for a JMenuItem is ActionListener, not MouseListener.

A better programming idiom is to disable the menu item when the internal frame is opened, and enable it when the internal frame is closed. You would use an InternalFrameListener for that, probably extending InternalFrameAdapter.

Another possibility, if you want to give the user the option to close the internal frame from the menu, is to use a JCheckBoxMenuItem.

Read the API for those classes and follow any links to the Oracle tutorials on 'How to Use ...'

db

edit: You've probably already been told this, but the NetBeans (or any other) visual designer is categorically not a beginners' tool. Unless you aim to make a career out of Swing GUI design (not likely, now that JavaFX has started to take over the market) it's just not worht the time and effort to learn all its quirks. That time and effort is much better spent in reading tutorials and learning how to code a Swing GUI by hand.

Thank you very much...

[mcajavaprogramer]

What about creating a JInternalFrames class member variable. Then, in the mouse click function, only create the internal frame if the member variable is null.

Jinternalframe1 jn = null;
private void Jinternalframe1_MenuMouseClicked(java.awt.event.MouseEvent evt) {
        if (jn == null) {
           jn = new Jinternalframe1();
           this.desktopPane.add(jn);
           jn.show();
        }
}

Thank you very much ...:)