GWT module does not map the proper Input.Buttons

[payne911]

Issue details

When trying to detect mouse clicks, the GWT module does not map the proper button clicks:

if (Gdx.input.isButtonJustPressed(Input.Buttons.RIGHT)) is actually triggered on left-click.

if(Gdx.input.isButtonJustPressed(Input.Buttons.MIDDLE)) is actually triggered on right-click.

if(Gdx.input.isButtonJustPressed(Input.Buttons.LEFT)) is not triggered through left-click, right-click, nor middle-click.

Reproduction steps/code

Try this piece of code to reproduce the issue. Via the DesktopLauncher it will work as expected, but when tried via the browser (after using dist and superDev html build tasks), it will behave as described above.

Version of LibGDX and/or relevant dependencies

1.9.10

Please select the affected platforms

HTML/GWT is the only platform I've seen this bug occur on so far.

[tommyettinger]

This is a real bug; it looks easy enough to fix. GwtInput has a getButton() method that remaps a constant from GWT's NativeEvent to the constants in libGDX's Input.Buttons. Take a look at

libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/GwtInput.java

Lines 591 to 592 in 6ac58f6

	this.pressedButtons.add(getButton(e.getButton()));
	justPressedButtons[e.getButton()] = true;

; one usage relating to the just-pressed buttons only uses the NativeEvent codes, and doesn't remap. This means @payne911 could either use NativeEvent's constants on GWT only (not any other platform), which seems bad but maybe necessary, or we could fix this by changing line 592 in GwtInput.java to call getButton() on the event's code from its own getButton() method (like on line 591).