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class:: DragBoth
summary:: A simple drag-and-drop source and receiver
categories:: GUI>Views
related:: Classes/DragSink, Classes/DragSource
DESCRIPTION::
link::Classes/DragSource::, link::Classes/DragSink:: and link::Classes/DragBoth:: are a set of view classes intended as simple-to-use drag-and-drop sources and destinations. They are graphically represented as a simple rectangle, and their specialty is that they emphasis::do not require the Cmd/Ctrl key to be held down to initiate dragging::.
Akin to link::Classes/StaticText:: they can store arbitrary content in the link::Classes/StaticText#-object#-object:: variable, and display it using link::Classes/Object#-asString::. You can set the displayed text separately using link::Classes/StaticText#-string#-string::, and keep it independent of the content if you set link::Classes/StaticText#-setBoth#-setBoth:: to code::false::.
strong::DragBoth::, specifically, strong::accepts any:: dropped data and stores it into the strong::-object:: variable, as well as gives that variable as data strong::for dragging::.
See: link::Classes/View#Drag and drop:: for a general description of the drag and drop mechanism.
CLASSMETHODS::
PRIVATE:: key
INSTANCEMETHODS::
METHOD:: defaultGetDrag
RETURNS:: The link::Classes/StaticText#-object#-object::.
METHOD:: defaultCanReceiveDrag
RETURNS:: Always True.
METHOD:: defaultReceiveDrag
Sets the link::Classes/StaticText#-object#-object:: to the current drag data.
EXAMPLES::
code::
(
w = Window.new.front;
w.addFlowLayout;
// store various kinds of objects in the drag source
// a string source
a = DragBoth(w, Rect(10, 10, 150, 20)).align_(\center).background_(Color.rand);
a.object = "drag us around";
a = DragBoth(w, Rect(10, 10, 150, 20)).align_(\center).background_(Color.rand);
a.object="SUPERCOLLIDER";
8.do{
a = DragBoth(w, Rect(10, 10, 150, 20)).align_(\center).background_(Color.rand);
a.receiveDragHandler = { arg obj; obj.object = View.currentDrag.scramble };
}
)
::
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