/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2015 - ROLI Ltd.

   Permission is granted to use this software under the terms of either:
   a) the GPL v2 (or any later version)
   b) the Affero GPL v3

   Details of these licenses can be found at: www.gnu.org/licenses

   JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

   ------------------------------------------------------------------------------

   To release a closed-source product which uses JUCE, commercial licenses are
   available: visit www.juce.com for more information.

  ==============================================================================
*/

#ifndef JUCE_RESIZABLECORNERCOMPONENT_H_INCLUDED
#define JUCE_RESIZABLECORNERCOMPONENT_H_INCLUDED


//==============================================================================
/** A component that resizes a parent component when dragged.

    This is the small triangular stripey resizer component you get in the bottom-right
    of windows (more commonly on the Mac than Windows). Put one in the corner of
    a larger component and it will automatically resize its parent when it gets dragged
    around.

    @see ResizableBorderComponent
*/
class JUCE_API  ResizableCornerComponent  : public Component
{
public:
    //==============================================================================
    /** Creates a resizer.

        Pass in the target component which you want to be resized when this one is
        dragged.

        The target component will usually be a parent of the resizer component, but this
        isn't mandatory.

        Remember that when the target component is resized, it'll need to move and
        resize this component to keep it in place, as this won't happen automatically.

        If a constrainer object is provided, then this object will be used to enforce
        limits on the size and position that the component can be stretched to. Make sure
        that the constrainer isn't deleted while still in use by this object. If you
        pass a nullptr in here, no limits will be put on the sizes it can be stretched to.

        @see ComponentBoundsConstrainer
    */
    ResizableCornerComponent (Component* componentToResize,
                              ComponentBoundsConstrainer* constrainer);

    /** Destructor. */
    ~ResizableCornerComponent();


protected:
    //==============================================================================
    /** @internal */
    void paint (Graphics&) override;
    /** @internal */
    void mouseDown (const MouseEvent&) override;
    /** @internal */
    void mouseDrag (const MouseEvent&) override;
    /** @internal */
    void mouseUp (const MouseEvent&) override;
    /** @internal */
    bool hitTest (int x, int y) override;

private:
    //==============================================================================
    WeakReference<Component> component;
    ComponentBoundsConstrainer* constrainer;
    Rectangle<int> originalBounds;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ResizableCornerComponent)
};


#endif   // JUCE_RESIZABLECORNERCOMPONENT_H_INCLUDED
