Use jbutton to scroll through a jscrollpane

Howdy, I'm currently writing a java program which replicates a GPS, on the points of interest screen for Airports, Restaurants etc I have each entry set as a separate jbutton, organized using a gridlayout (1 column listing all entries) and finally the user is able to scroll through the entries (jscrollpanel). I have 2 arrow buttons for up/down and I want to use them to scroll through the list of entries. Is this possible?

Cheers
Josh

So you have a row of JButtons you want to scroll through? What happens when you add them all to a JPanel, then add the JPanel to a JScrollPane?

Recommended reading: How to Use Scroll Panes (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components)

Quote:

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Originally Posted by KevinWorkman

So you have a row of JButtons you want to scroll through? What happens when you add them all to a JPanel, then add the JPanel to a JScrollPane?

Recommended reading: How to Use Scroll Panes (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components)

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Sorry, I didn't word my question very well. The jButtons have already been added to a jPanel, and the jPanel to the jScrollpane. I have two separate jButtons to the right of this jScrollpane which I want to use to scroll the jScrollpane up/down, is this possible?

Get the appropriate JScrollBar of the JScrollPane, and set its value based upon its current value.
In pseudo-code that can be implemented in a JButton action listener:

Code :

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myScrollPane.getVerticalScrollBar().setValue( myScrollPane.getVerticalScrollBar().getValue() + myScrollPane.getVerticalScrollBar().getUnitIncrement());

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Thanks, that helped heaps. I got it to work by doing this:

Code :

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JButton upButton = new JButton("Up");
upButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent arg0){
scrollPane.getVerticalScrollBar().setBlockIncrement(50);
 
scrollPane.transferFocusDownCycle();
scrollPane.getVerticalScrollBar().setValue( scrollPane.getVerticalScrollBar().getValue() - scrollPane.getVerticalScrollBar().getBlockIncrement());
 
}
});
 
JButton downButton = new JButton("Down");
 
downButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent arg0){
scrollPane.getVerticalScrollBar().setBlockIncrement(50);
 
scrollPane.transferFocusDownCycle();
scrollPane.getVerticalScrollBar().setValue( scrollPane.getVerticalScrollBar().getValue() + scrollPane.getVerticalScrollBar().getBlockIncrement());
 
}
});

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