Constant gdk4::BUTTON_PRIMARY 
source · pub const BUTTON_PRIMARY: u32 = _; // 1u32Expand description
The primary button. This is typically the left mouse button, or the right button in a left-handed setup.
pub const BUTTON_PRIMARY: u32 = _; // 1u32The primary button. This is typically the left mouse button, or the right button in a left-handed setup.