Mouse Button State

Each individual Window keeps a record of each mouse button's state - this state can either be "press" or "release." Each window maintains its own record because windows only receive information from the mouse when they have input focus. Therefore multiple windows can have different interpretations of each mouse button's state.

mouse_button_pressed?

You can find out whether or not a specific Window thinks a MouseButton is currently pressed or released using the mouse_button_pressed? method:

mouse_button = event.mouse_button # => CrystGLFW::MouseButton
window.mouse_button_pressed?(mouse_button) # => Bool

mouse_button_pressed? returns true if the Window thinks that the MouseButton is currently pressed, and returns false if the Window thinks that the MouseButton is currently released. The return value of this method is affected by sticky mouse buttons.