EventButtonProtocol

public protocol EventButtonProtocol

The EventButtonProtocol protocol exposes the methods and properties of an underlying GdkEventButton instance. The default implementation of these can be found in the protocol extension below. For a concrete class that implements these methods and properties, see EventButton. Alternatively, use EventButtonRef as a lighweight, unowned reference if you already have an instance you just want to use.

Used for button press and button release events. The type field will be one of GDK_BUTTON_PRESS, GDK_2BUTTON_PRESS, GDK_3BUTTON_PRESS or GDK_BUTTON_RELEASE,

Double and triple-clicks result in a sequence of events being received. For double-clicks the order of events will be:

• GDK_BUTTON_PRESS
• GDK_BUTTON_RELEASE
• GDK_BUTTON_PRESS
• GDK_2BUTTON_PRESS
• GDK_BUTTON_RELEASE

Note that the first click is received just like a normal button press, while the second click results in a GDK_2BUTTON_PRESS being received just after the GDK_BUTTON_PRESS.

Triple-clicks are very similar to double-clicks, except that GDK_3BUTTON_PRESS is inserted after the third click. The order of the events is:

• GDK_BUTTON_PRESS
• GDK_BUTTON_RELEASE
• GDK_BUTTON_PRESS
• GDK_2BUTTON_PRESS
• GDK_BUTTON_RELEASE
• GDK_BUTTON_PRESS
• GDK_3BUTTON_PRESS
• GDK_BUTTON_RELEASE

For a double click to occur, the second button press must occur within ¼ of a second of the first. For a triple click to occur, the third button press must also occur within ½ second of the first button press.