/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <tools/debug.hxx>
#include <vcl/status.hxx>
#include <vcl/prgsbar.hxx>
#include <vcl/settings.hxx>

#define PROGRESSBAR_OFFSET          3
#define PROGRESSBAR_WIN_OFFSET      2

void ProgressBar::ImplInit()
{
    mnPercent   = 0;
    mbCalcNew   = true;

    ImplInitSettings( true, true, true );
}

static WinBits clearProgressBarBorder( vcl::Window* pParent, WinBits nOrgStyle )
{
    WinBits nOutStyle = nOrgStyle;
    if( pParent && (nOrgStyle & WB_BORDER) != 0 )
    {
        if( pParent->IsNativeControlSupported( CTRL_PROGRESS, PART_ENTIRE_CONTROL ) )
            nOutStyle &= WB_BORDER;
    }
    return nOutStyle;
}

Size ProgressBar::GetOptimalSize() const
{
    return Size(150, 20);
}

ProgressBar::ProgressBar( vcl::Window* pParent, WinBits nWinStyle ) :
    Window( pParent, clearProgressBarBorder( pParent, nWinStyle ) )
{
    SetOutputSizePixel( GetOptimalSize() );
    ImplInit();
}

ProgressBar::~ProgressBar()
{
}

void ProgressBar::ImplInitSettings( bool bFont,
                                    bool bForeground, bool bBackground )
{
    const StyleSettings& rStyleSettings = GetSettings().GetStyleSettings();

/* FIXME: !!! We do not support text output at the moment
    if ( bFont )
    {
        Font aFont;
        aFont = rStyleSettings.GetAppFont();
        if ( IsControlFont() )
            aFont.Merge( GetControlFont() );
        SetZoomedPointFont( aFont );
    }
*/

    if ( bBackground )
    {
        if( !IsControlBackground() &&
            IsNativeControlSupported( CTRL_PROGRESS, PART_ENTIRE_CONTROL ) )
        {
            if( (GetStyle() & WB_BORDER) )
                SetBorderStyle( WindowBorderStyle::REMOVEBORDER );
            EnableChildTransparentMode( true );
            SetPaintTransparent( true );
            SetBackground();
            SetParentClipMode( PARENTCLIPMODE_NOCLIP );
        }
        else
        {
            Color aColor;
            if ( IsControlBackground() )
                aColor = GetControlBackground();
            else
                aColor = rStyleSettings.GetFaceColor();
            SetBackground( aColor );
        }
    }

    if ( bForeground || bFont )
    {
        Color aColor = rStyleSettings.GetHighlightColor();
        if ( IsControlForeground() )
            aColor = GetControlForeground();
        if ( aColor.IsRGBEqual( GetBackground().GetColor() ) )
        {
            if ( aColor.GetLuminance() > 100 )
                aColor.DecreaseLuminance( 64 );
            else
                aColor.IncreaseLuminance( 64 );
        }
        SetLineColor();
        SetFillColor( aColor );
/* FIXME: !!! We do not support text output at the moment
        SetTextColor( aColor );
        SetTextFillColor();
*/
    }
}

void ProgressBar::ImplDrawProgress( sal_uInt16 nOldPerc, sal_uInt16 nNewPerc )
{
    if ( mbCalcNew )
    {
        mbCalcNew = false;

        Size aSize = GetOutputSizePixel();
        mnPrgsHeight = aSize.Height()-(PROGRESSBAR_WIN_OFFSET*2);
        mnPrgsWidth = (mnPrgsHeight*2)/3;
        maPos.Y() = PROGRESSBAR_WIN_OFFSET;
        long nMaxWidth = (aSize.Width()-(PROGRESSBAR_WIN_OFFSET*2)+PROGRESSBAR_OFFSET);
        sal_uInt16 nMaxCount = (sal_uInt16)(nMaxWidth / (mnPrgsWidth+PROGRESSBAR_OFFSET));
        if ( nMaxCount <= 1 )
            nMaxCount = 1;
        else
        {
            while ( ((10000/(10000/nMaxCount))*(mnPrgsWidth+PROGRESSBAR_OFFSET)) > nMaxWidth )
                nMaxCount--;
        }
        mnPercentCount = 10000/nMaxCount;
        nMaxWidth = ((10000/(10000/nMaxCount))*(mnPrgsWidth+PROGRESSBAR_OFFSET))-PROGRESSBAR_OFFSET;
        maPos.X() = (aSize.Width()-nMaxWidth)/2;
    }

    ::DrawProgress( this, maPos, PROGRESSBAR_OFFSET, mnPrgsWidth, mnPrgsHeight,
                    nOldPerc*100, nNewPerc*100, mnPercentCount,
                    Rectangle( Point(), GetSizePixel() ) );
}

void ProgressBar::Paint( const Rectangle& )
{
    ImplDrawProgress( 0, mnPercent );
}

void ProgressBar::Resize()
{
    mbCalcNew = true;
    if ( IsReallyVisible() )
        Invalidate();
}

void ProgressBar::SetValue( sal_uInt16 nNewPercent )
{
    DBG_ASSERTWARNING( nNewPercent <= 100, "StatusBar::SetProgressValue(): nPercent > 100" );

    if ( nNewPercent < mnPercent )
    {
        mbCalcNew = true;
        mnPercent = nNewPercent;
        if ( IsReallyVisible() )
        {
            Invalidate();
            Update();
        }
    }
    else
    {
        ImplDrawProgress( mnPercent, nNewPercent );
        mnPercent = nNewPercent;
    }
}

void ProgressBar::StateChanged( StateChangedType nType )
{
/* FIXME: !!! We do not support text output at the moment
    if ( (nType == StateChangedType::ZOOM) ||
         (nType == StateChangedType::CONTROLFONT) )
    {
        ImplInitSettings( true, false, false );
        Invalidate();
    }
    else
*/
    if ( nType == StateChangedType::CONTROLFOREGROUND )
    {
        ImplInitSettings( false, true, false );
        Invalidate();
    }
    else if ( nType == StateChangedType::CONTROLBACKGROUND )
    {
        ImplInitSettings( false, false, true );
        Invalidate();
    }

    Window::StateChanged( nType );
}

void ProgressBar::DataChanged( const DataChangedEvent& rDCEvt )
{
    if ( (rDCEvt.GetType() == DataChangedEventType::SETTINGS) &&
         (rDCEvt.GetFlags() & AllSettingsFlags::STYLE) )
    {
        ImplInitSettings( true, true, true );
        Invalidate();
    }

    Window::DataChanged( rDCEvt );
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */