/**
 * @file llresizebar.h
 * @brief LLResizeBar 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_RESIZEBAR_H
#define LL_RESIZEBAR_H

#include "llview.h"

class LLResizeBar : public LLView
{
public:
    enum Side { LEFT, TOP, RIGHT, BOTTOM };

    struct Params : public LLInitParam::Block<Params, LLView::Params>
    {
        Mandatory<LLView*> resizing_view;
        Mandatory<Side> side;

        Optional<S32>   min_size;
        Optional<S32>   max_size;
        Optional<bool>  snapping_enabled;
        Optional<bool>  allow_double_click_snapping;

        Params();
    };

protected:
    LLResizeBar(const LLResizeBar::Params& p);
    friend class LLUICtrlFactory;

public:

    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);
    virtual bool    handleDoubleClick(S32 x, S32 y, MASK mask);

    void            setResizeLimits( S32 min_size, S32 max_size ) { mMinSize = min_size; mMaxSize = max_size; }
    void            setEnableSnapping(bool enable) { mSnappingEnabled = enable; }
    void            setAllowDoubleClickSnapping(bool allow) { mAllowDoubleClickSnapping = allow; }
    bool            canResize() const { return getEnabled() && mMaxSize > mMinSize; }
    void            setResizeListener(boost::function<void(void*)> listener) {mResizeListener = listener;}
    void            setImagePanel(LLPanel * panelp);
    LLPanel *       getImagePanel() const;

private:
    S32                             mDragLastScreenX;
    S32                             mDragLastScreenY;
    S32                             mLastMouseScreenX;
    S32                             mLastMouseScreenY;
    LLCoordGL                       mLastMouseDir;
    S32                             mMinSize;
    S32                             mMaxSize;
    const Side                      mSide;
    bool                            mSnappingEnabled,
                                    mAllowDoubleClickSnapping;
    LLView*                         mResizingView;
    boost::function<void(void*)>    mResizeListener;
    LLPointer<LLUIImage>            mDragHandleImage;
    LLPanel *                       mImagePanel;
};

#endif  // LL_RESIZEBAR_H