Accelerators - odd behavior

Stephen F Northover steve.x.northover at
Fri Sep 26 17:20:56 UTC 2014

I am only seeing the runnable fired once in FX 8u40.



1) Run TestKeyCombination
2) Press Control+-

Here is the test code:

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.input.KeyCharacterCombination;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyCodeCombination;
import javafx.scene.input.KeyCombination;
import javafx.stage.Stage;

public class TestKeyCombination extends Application {
     public static void main(String[] args) {

     @Override public void start(Stage stage) {
         stage.setTitle("Test KeyCombination");
         Scene scene = new Scene(new Group(), 600, 450);
         Button button1 = new Button();
         button1.setText("Click Me");

         KeyCombination cmdMinus = new KeyCodeCombination(KeyCode.MINUS, 
         KeyCombination cmdMinusFromCharacter = new 
KeyCharacterCombination("-", KeyCombination.CONTROL_DOWN);
         Runnable runnable = () -> System.out.println("HI");
         scene.getAccelerators().put(cmdMinus, runnable);
         scene.getAccelerators().put(cmdMinusFromCharacter, runnable);

On 2014-09-26, 1:01 PM, Scott Palmer wrote:
> KeyCombination cmdMinus = new Key*Code*Combination(KeyCode.MINUS,
> KeyCombination.CONTROL_DOWN);
> KeyCombination cmdMinusFromCharacter = new Key*Character*Combination("-",
> KeyCombination.CONTROL_DOWN);
> Using the above like this:
> scene.getAccelerators().put(cmdMinus, runnable);
> scene.getAccelerators().put(cmdMinusFromCharacter, runnable);
> Will result in the runnable being fired twice from the same keypress.
> I propose changing the accelerator processing logic so that only one
> runnable gets called as the intention appears to be that a KeyCombination
> can only have one runnable associated with it, but the logic in Map doesn't
> see the above two KeyCombinations as the same key in the Map.
> Note: With the second combination above I really wanted something that
> worked for both MINUS and SUBTRACT simultaneously - since they both type
> the same Character and only one accelerator can be set on a MenuItem.
> Scott

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