JButton show tooltip programically: actionMap.get("postTip") is null

Question

I need to programically show tooltip for my button2 when it gets focus. (I press Tab as intially focus at button1)

            JButton button = new JButton("Button 1");

            JButton button2 = new JButton("Button 2");
            button2.setToolTipText("tooltip2");
            button2.addFocusListener(new FocusListener());

I refer the code by @camickr

private class FocusListener extends FocusAdapter {
 public void focusGained(FocusEvent e)
 {
    JComponent component = (JComponent)e.getSource();
    Action toolTipAction = component.getActionMap().get("postTip");

but toolTipAction is set null.

I have printed all the entries of ActionMap using this code

        ActionMap actionMap = component.getActionMap();
        Object[] actionMapKeys = actionMap.allKeys();

        for (int i = 0; i < actionMapKeys.length; i++) {
            Object key = actionMapKeys[i];
            System.out.println(key.toString() + " : " + actionMap.get(key).toString());
        }

This is what it gives me

pressed : javax.swing.plaf.basic.BasicButtonListener$Actions@49cf9f
released : javax.swing.plaf.basic.BasicButtonListener$Actions@1de0b5e

So how can I call this code if I got toolTipAction null?

ActionEvent postTip = new ActionEvent(component, ActionEvent.ACTION_PERFORMED, "");
toolTipAction.actionPerformed(postTip);

For better help sooner, post an [SSCCE](http://sscce.org/). – Andrew Thompson Nov 28 '12 at 06:49 — Andrew Thompson, Nov 28 '12 at 06:49

Ashwinee K Jha · Answer 1 · 2012-11-28T06:48:22.473

2

You could also try alternative approach of configuring the tooltip manager to immediately show the tooltip when mouse is entered.

javax.swing.ToolTipManager.sharedInstance().setInitialDelay(0)

If you want this to happen only for some components then you could change this value depending on the component that gets focus.

Tooltip is also shown when Ctrl+F1 is pressed. So may be you could simulate a Ctrl+F1 using java.awt.Robot on the button when you want to display tooltip.

edited Nov 28 '12 at 06:48

answered Nov 28 '12 at 06:40

Ashwinee K Jha

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actuall I want to show tooltip on some network event, which has nothing to do with mouse. but I have started experiments with focus gained by Tab key – Nikolay Kuznetsov Nov 28 '12 at 06:41

score 2 · Accepted Answer · edited May 23 '17 at 11:47

2

actuall I want to show tooltip on some network event, which has nothing to do with mouse. but I have started experiments with focus gained by Tab key

use JWindow (undecorated JDialog) or JLabel instead of ToolTip, examples for JLabel by @Guillaume Polet and here
you can to lay this container to the Mouse Cursor possition or to stick to absolute coordinates, Point to the visible GUI
standard could be (can be annoying) see SystemTray and TrayIcon#displayMessage

edited May 23 '17 at 11:47

Community

1
1

answered Nov 28 '12 at 06:53

mKorbel

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@NikolayKuznetsov You can also take a look at [this answer](http://stackoverflow.com/questions/12822819/dynamically-update-tooltip-currently-displayed/12823177#12823177) where I automatically make a tooltip appear on a component although I don't have any actual MouseEvent (we dynamically create a fake one): `ToolTipManager.sharedInstance().mouseMoved( new MouseEvent(component, -1, System.currentTimeMillis(), 0, locationOnComponent.x, locationOnComponent.y, locationOnScreen.x, locationOnScreen.y, 0, false, 0));` – Guillaume Polet Nov 28 '12 at 09:34

JButton show tooltip programically: actionMap.get("postTip") is null

2 Answers2