JSplitPane set resizable false

Question

How to make JSplitPane to resizable false? I didn't want to resize the JSplitPane, I used it for the border of this pane. Is there any other way to create same border structure to split a panel vertically into two parts.

Tropic

Disable the split pane. See below. – Mammilla

Answer 1

You can override the JSplitPane methodes getDividerLocation() and getLastDividerLocation and return a constant value.

JSplitPane split = new JSplitPane(JSplitPane.VERTICAL_SPLIT){
    private final int location = 100;
    {
        setDividerLocation( location );
    }
    @Override
    public int getDividerLocation() {
        return location ;
    }
    @Override
    public int getLastDividerLocation() {
        return location ;
    }
};

Subarctic

@Tapas Bose, no need to extend the split pane class. – Mammilla

@Mammilla But that's exactly what this solution does, it extends JSpiltPane with an anonymous class. – Nonagenarian

Answer 2

splitPane.setEnabled( false );

Mammilla

but with nimbus i see no border if it is disabled. :( – Subarctic

this solution is simple and awesome – Unman

This disables subcomponents if they inherit the parent status of enabled/disable. e.g. a jlist may be disabled from being able to be selected. – Stopwatch

@Mgamerz, a JList works fine for me using JDK8 on Windows 7. The setEnabled() method only applies to the component, not child components. For example see the Swing tutorial on How to Use Split Panes for an example with a JList. – Mammilla

@Mammilla When I disable this split pane some of my sub components are no longer selectable. I cannot pick items in a Jlist and a sub-splitpane doesn't have the cursor change to indicate it is movable while it still is. Removing the disable makes it work normally again. – Stopwatch

@Mgamerz, You have custom code that isn't working properly. I gave you a link to the demo code from the Swing tutorial and I already stated it works fine for me. If the tutorial code doesn't work then m\Maybe you have a version / OS bug. This is NOT the way enable is designed to work. That is you can't use disabled on a JPanel to disable all components on the panel. If you have a question then create a proper SSCCE and post a real question on the forum. Stating something doesn't work without posting code means nothing. It is probably your code, not Swing. – Mammilla

Answer 3

For preventing users to resize the panes you can also set the divider size to zero.

splitPane.setDividerSize(0);

Jennie

Answer 4

Consider for using Compound Borders with EtchedBorder

Keep

Answer 5

final double pos = split.getDividers().get(0).getPosition();
split.getDividers().get(0).positionProperty().addListener(new ChangeListener<Number>() {
    @Override
    public void changed(ObservableValue<? extends Number> arg0,
            Number arg1, Number arg2) {
        split.getDividers().get(0).setPosition(pos);
    }
});

Plastered

Answer 6

As stated un @camickr answer comments, disabling the whole split pane can disable contained components interactive behavior (for example, they won't show their interactive cursors on hover)

instead, if using BasicSplitPaneUI, you can disable the divider from the UI

public class MySplitPane extends JSplitPane {

    public void setResizable(boolean resizable) {
        BasicSplitPaneUIui = (BasicSplitPaneUI) this.getUI();
        ui.getDivider().setEnabled(resizable);
    }
}

Chiffonier

Answer 7

@TrogloGeek's and @Dennis van Beek answers didn't work for me because user still can grab divider and move it while cursor remains default (which should be considered as inability of interaction).

Even if it worked, i still was in need of OneTouchExpandable which will be disabled because of Divider beeing disabled. So, what i did:

1. A custom BasicSplitPaneUI including custom Divider and method to add it to BasicSplitPaneUI. Custom BasicSplitPaneUI also contains overridden methods: startDragging(), dragDividerTo(int location), finishDraggingTo(int location) to do nothing:

    private class SplitPanelUI extends BasicSplitPaneUI{
   
        public SplitPanelUI(){
            super();
        }
   
        protected void setDivider(int dividerSize) {
            divider = new Divider(this);
            divider.setDividerSize(dividerSize);
        }
   
        @Override
        protected void startDragging(){
        }
   
        @Override
        protected void dragDividerTo(int location) {
        }
   
        @Override
        protected void finishDraggingTo(int location) {
        }
    }
   

2. Added Custom Divider with changed Сursor while mouse hovering on it:

    private class Divider extends BasicSplitPaneDivider {
        public Divider(BasicSplitPaneUI ui) {
            super(ui);
   
            setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
        }
    }
   

Usage example:

    SplitPane sp = new SplitPane(JSplitPane.HORIZONTAL_SPLIT, JPanel1, JPanel2); 

    sp.setOneTouchExpandable(true);
    sp.setEnabled(true);

    SplitPanelUI ui = new SplitPanelUI();
    ui.installUI(this);
    ui.setDivider(dividerSize);

    sp.setUI(ui);

    this.setResizeWeight(1); //percentage (or use setDividerLocation)
    //setDividerLocation(200); //in pixels

I hope it would help someone.

Sitra

Answer 8

@TrogloGeek's answer works best, to avoid problems with the disabled splitpane.

For example, if you want to make a pane that is 'onetouchexpandable', but not resizable, you can use this:

public class FixedExpandableSplitPane extends JSplitPane {

    public FixedExpandableSplitPane(int orientation) {
        super(orientation);
        setOneTouchExpandable(true);
        BasicSplitPaneUI ui = (BasicSplitPaneUI) this.getUI();
        ui.getDivider().setEnabled(false);
    }
}

Godhood