type MouseEvent: buttons are not handled

[DoctorovEV]

Ben, good Health!

How to determine which mouse button is pressed in event OnMouseMove?

[Ben Clayton]

Hi @DoctorovEV,
Currently you cannot.
If you want this, then:

• The MouseButton enum should become a MouseButtonState bitfield, and should have the following methods added:

func (s MouseButtonState) IsLeftDown() bool { ... }
func (s MouseButtonState) IsMiddleDown() bool { ... }
func (s MouseButtonState) IsRightDown() bool { ... }

• MouseEvent.Button should be renamed to ButtonState.
• All the places where a MouseEvent is created in viewport.go should be updated to assign the ButtonState field.
• All the existing code that checks for button equality would have to be updated to use the IsLeftDown() / IsMiddleDown() / IsRightDown() methods instead.

I can do this, but I'm exceptionally busy this week. I'm happy to review a pull-request if you're comfortable doing this yourself.

Cheers,
Ben

[DoctorovEV]

Thank you, Ben. I'll wait for the official implementation of the next week.

[Ben Clayton]

@yofu has done the hard work on this. Please reopen if this doesn't give you what you need.