/**
 * @file llresizehandle.h
 * @brief LLResizeHandle base class
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_RESIZEHANDLE_H
#define LL_RESIZEHANDLE_H

#include "stdtypes.h"
#include "llview.h"
#include "llcoord.h"


class LLResizeHandle : public LLView
{
public:
    enum ECorner { LEFT_TOP, LEFT_BOTTOM, RIGHT_TOP, RIGHT_BOTTOM };

    struct Params : public LLInitParam::Block<Params, LLView::Params>
    {
        Mandatory<ECorner>  corner;
        Optional<S32>       min_width;
        Optional<S32>       min_height;
        Params();
    };

    ~LLResizeHandle();
protected:
    LLResizeHandle(const LLResizeHandle::Params&);
    friend class LLUICtrlFactory;
public:
    virtual void    draw();
    virtual bool    handleHover(S32 x, S32 y, MASK mask);
    virtual bool    handleMouseDown(S32 x, S32 y, MASK mask);
    virtual bool    handleMouseUp(S32 x, S32 y, MASK mask);

    void            setResizeLimits( S32 min_width, S32 min_height ) { mMinWidth = min_width; mMinHeight = min_height; }

private:
    bool            pointInHandle( S32 x, S32 y );

    S32             mDragLastScreenX;
    S32             mDragLastScreenY;
    S32             mLastMouseScreenX;
    S32             mLastMouseScreenY;
    LLCoordGL       mLastMouseDir;
    LLPointer<LLUIImage>    mImage;
    S32             mMinWidth;
    S32             mMinHeight;
    const ECorner   mCorner;
};

const S32 RESIZE_HANDLE_HEIGHT = 11;
const S32 RESIZE_HANDLE_WIDTH = 11;

#endif  // LL_RESIZEHANDLE_H