/**
 * @file lltoolselectrect.cpp
 * @brief A tool to select multiple objects with a screen-space rectangle.
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * 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
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

// File includes
#include "lltoolselectrect.h"

// Library includes
#include "llgl.h"
#include "llrender.h"

// Viewer includes
#include "llviewercontrol.h"
#include "llui.h"
#include "llselectmgr.h"
#include "lltoolmgr.h"
#include "llviewerobject.h"
#include "llviewerobjectlist.h"
#include "llviewerwindow.h"
#include "llviewercamera.h"

#include "llglheaders.h"

// Globals
const S32 SLOP_RADIUS = 5;


//
// Member functions
//

LLToolSelectRect::LLToolSelectRect( LLToolComposite* composite )
    :
    LLToolSelect( composite ),
    mDragStartX(0),
    mDragStartY(0),
    mDragEndX(0),
    mDragEndY(0),
    mDragLastWidth(0),
    mDragLastHeight(0),
    mMouseOutsideSlop(false)

{ }


void dialog_refresh_all(void);

bool LLToolSelectRect::handleMouseDown(S32 x, S32 y, MASK mask)
{
    bool pick_rigged = false; //gSavedSettings.getBOOL("AnimatedObjectsAllowLeftClick");
    handlePick(gViewerWindow->pickImmediate(x, y, true /* pick_transparent */, pick_rigged));

    LLTool::handleMouseDown(x, y, mask);

    return mPick.getObject().notNull();
}

void LLToolSelectRect::handlePick(const LLPickInfo& pick)
{
    mPick = pick;

    // start dragging rectangle
    setMouseCapture( true );

    mDragStartX = pick.mMousePt.mX;
    mDragStartY = pick.mMousePt.mY;
    mDragEndX = pick.mMousePt.mX;
    mDragEndY = pick.mMousePt.mY;

    mMouseOutsideSlop = false;
}


bool LLToolSelectRect::handleMouseUp(S32 x, S32 y, MASK mask)
{
    setMouseCapture( false );

    if( mMouseOutsideSlop )
    {
        mDragLastWidth = 0;
        mDragLastHeight = 0;

        mMouseOutsideSlop = false;

        if (mask == MASK_CONTROL)
        {
            LLSelectMgr::getInstance()->deselectHighlightedObjects();
        }
        else
        {
            LLSelectMgr::getInstance()->selectHighlightedObjects();
        }
        return true;
    }
    else
    {
        return LLToolSelect::handleMouseUp(x, y, mask);
    }
}


bool LLToolSelectRect::handleHover(S32 x, S32 y, MASK mask)
{
    if( hasMouseCapture() )
    {
        if (mMouseOutsideSlop || outsideSlop(x, y, mDragStartX, mDragStartY))
        {
            if (!mMouseOutsideSlop && !(mask & MASK_SHIFT) && !(mask & MASK_CONTROL))
            {
                // just started rect select, and not adding to current selection
                LLSelectMgr::getInstance()->deselectAll();
            }
            mMouseOutsideSlop = true;
            mDragEndX = x;
            mDragEndY = y;

            handleRectangleSelection(x, y, mask);
        }
        else
        {
            return LLToolSelect::handleHover(x, y, mask);
        }

        LL_DEBUGS("UserInput") << "hover handled by LLToolSelectRect (active)" << LL_ENDL;
    }
    else
    {
        LL_DEBUGS("UserInput") << "hover handled by LLToolSelectRect (inactive)" << LL_ENDL;
    }

    gViewerWindow->setCursor(UI_CURSOR_ARROW);
    return true;
}


void LLToolSelectRect::draw()
{
    if( hasMouseCapture() && mMouseOutsideSlop)
    {
        if (gKeyboard->currentMask(true) == MASK_CONTROL)
        {
            gGL.color4f(1.f, 0.f, 0.f, 1.f);
        }
        else
        {
            gGL.color4f(1.f, 1.f, 0.f, 1.f);
        }
        gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
        gl_rect_2d(
            llmin(mDragStartX, mDragEndX),
            llmax(mDragStartY, mDragEndY),
            llmax(mDragStartX, mDragEndX),
            llmin(mDragStartY, mDragEndY),
            false);
        if (gKeyboard->currentMask(true) == MASK_CONTROL)
        {
            gGL.color4f(1.f, 0.f, 0.f, 0.1f);
        }
        else
        {
            gGL.color4f(1.f, 1.f, 0.f, 0.1f);
        }
        gl_rect_2d(
            llmin(mDragStartX, mDragEndX),
            llmax(mDragStartY, mDragEndY),
            llmax(mDragStartX, mDragEndX),
            llmin(mDragStartY, mDragEndY));
    }
}

// true if x,y outside small box around start_x,start_y
bool LLToolSelectRect::outsideSlop(S32 x, S32 y, S32 start_x, S32 start_y)
{
    S32 dx = x - start_x;
    S32 dy = y - start_y;

    return (dx <= -SLOP_RADIUS || SLOP_RADIUS <= dx || dy <= -SLOP_RADIUS || SLOP_RADIUS <= dy);
}


//
// Static functions
//