The ::map signal is emitted when widget is going to be mapped, that is when the widget is visible (which is controlled with Widget.setVisible) and all its parents up to the toplevel widget are also visible. Once the map has occurred, map-event will be emitted.

The ::map signal can be used to determine whether a widget will be drawn, for instance it can resume an animation that was stopped during the emission of unmap.

class Widget
void delegate dlg
ConnectFlags connectFlags = cast(ConnectFlags)0