An object to take care of the logic for dragging components around with the mouse. More...

Public Member Functions
	ComponentDragger ()
	Creates a ComponentDragger. More...

virtual	~ComponentDragger ()
	Destructor. More...

void	startDraggingComponent (Component *componentToDrag, const MouseEvent &e)
	Call this from your component's mouseDown() method, to prepare for dragging. More...

void	dragComponent (Component componentToDrag, const MouseEvent &e, ComponentBoundsConstrainer constrainer)
	Call this from your mouseDrag() callback to move the component. More...

Detailed Description

An object to take care of the logic for dragging components around with the mouse.

Very easy to use - in your mouseDown() callback, call startDraggingComponent(), then in your mouseDrag() callback, call dragComponent().

When starting a drag, you can give it a ComponentBoundsConstrainer to use to limit the component's position and keep it on-screen.

e.g.

class MyDraggableComp
{
    ComponentDragger myDragger;
    void mouseDown (const MouseEvent& e)
    {
        myDragger.startDraggingComponent (this, e);
    }
    void mouseDrag (const MouseEvent& e)
    {
        myDragger.dragComponent (this, e, nullptr);
    }
};

Constructor & Destructor Documentation

◆ ComponentDragger()

ComponentDragger::ComponentDragger ( )

Creates a ComponentDragger.

◆ ~ComponentDragger()

virtual ComponentDragger::~ComponentDragger ( )

virtual

Destructor.

Member Function Documentation

◆ startDraggingComponent()

void ComponentDragger::startDraggingComponent	(	Component *	componentToDrag,
		const MouseEvent &	e
	)

Call this from your component's mouseDown() method, to prepare for dragging.

Parameters

componentToDrag	the component that you want to drag
e	the mouse event that is triggering the drag

See also: dragComponent

◆ dragComponent()

void ComponentDragger::dragComponent	(	Component *	componentToDrag,
		const MouseEvent &	e,
		ComponentBoundsConstrainer *	constrainer
	)

Call this from your mouseDrag() callback to move the component.

This will move the component, using the given constrainer object to check the new position.