CODEWITHSUNDEEP
javaswingcombobox
Luis Miguel
Luis Miguel

Reputation: 13

How to add an OnMouseClick listener to a selected item inside a JComboBox popup menu?

I am doing a desktop application where I need that when the user click or select an specific item (lest say "SHOW.DIALOG.ITEM") of a JComboBox triggers a listener that open a new JDialog that I use to configure that item. The code in 1 shows how I do it with a ItemListener and it works fine in showing the JDialog. In another part of the application where I load the values of the combo box (see code 2) I set to the JComboBox that the selected value is the specific item that shows the dialog and of curse it shows the dialog to the user because the combo box has the ItemListener and the if() condition,but the problem is that in my application I do not want that behavior to happen in that moment, i just want to happen only when the user select the item in the combo box. That is why I try to add an OnClickMouse listener instead of the ItemListener because I believe that may resolve my problem, but I can not find how to add a mouse listener to the comboBox that works like I want (I have try the addMouseListener with an onClick MouseAdapter but it do not work in showing the dialog). If anyone has a better idea of how I should do this or a way to adding an OnMouseClick listener to the comboBox that emulates the wanted behavior,it will be very helpful. Thanks

1) Adding item listener to the comboBox that shows the dialog after selecting the item

comboBox.addItemListener(e -> {
    if (ItemEvent.SELECTED == e.getStateChange()) {
        String valueAfterSelection = e.getItem().toString();
        if (valueAfterSelection.equalsIgnoreCase("SHOW.DIALOG.ITEM")) {
            dialog.setVisible(true);
        }
    }
}

2) Setting to the comboBox the specific item (this open the dialog and I do not want that to happen in that moment)

String value = reader.readComboBoxValue();
if (value.equalsIgnoreCase("SHOW.DIALOG.ITEM")) {
    comboBox.setSelectedItem(value);
}

Upvotes: 1

Views: 597

Answers (1)

camickr
camickr

Reputation: 324118

You can always remove the listener before changing the selection:

comboBox.removeItemListener(...);
comboBox.setSelectedItem(value);
comboBox.addItemListener(...);

This means you would need to keep a reference to the listener when you create it, so you can easily remove/add as needed.

Upvotes: 2

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