GimpZoomModel @gimpzoommodel: the object which received the signal. @arg1: @arg2: @GIMP_ZOOM_IN: @GIMP_ZOOM_OUT: @GIMP_ZOOM_IN_MORE: @GIMP_ZOOM_OUT_MORE: @GIMP_ZOOM_IN_MAX: @GIMP_ZOOM_OUT_MAX: @GIMP_ZOOM_TO: @Returns: @model: @min: @max: @model: @zoom_type: @scale: @model: @Returns: @model: @numerator: @denominator: @model: @zoom_type: @icon_size: @Returns: @zoom_type: @scale: @Returns: