/* -*- 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 <vcl/event.hxx>

#include <vcl/layout.hxx>

#include <vcl/tabpage.hxx>

#include <vcl/bitmap.hxx>

#include <vcl/settings.hxx>

#include <vcl/toolkit/scrbar.hxx>

#include <svdata.hxx>

void TabPage::ImplInit( vcl::Window* pParent, WinBits nStyle )

{

    if ( !(nStyle & WB_NODIALOGCONTROL) )

        nStyle |= WB_DIALOGCONTROL;

    Window::ImplInit( pParent, nStyle, nullptr );

    bool bHasHoriBar = false;

    bool bHasVertBar = false;

    Link<ScrollBar*,void> aLink( LINK( this, TabPage, ScrollBarHdl ) );

    if ( nStyle & ( WB_AUTOHSCROLL | WB_AUTOVSCROLL ) )

    {

        if ( nStyle & WB_AUTOHSCROLL )

        {

            bHasHoriBar = true;

            m_pHScroll.reset(VclPtr<ScrollBar>::Create(this, (WB_HSCROLL | WB_DRAG)));

            m_pHScroll->Show();

            m_pHScroll->SetScrollHdl(aLink);

        }

        if ( nStyle &  WB_AUTOVSCROLL )

        {

            bHasVertBar = true;

            m_pVScroll.reset(VclPtr<ScrollBar>::Create(this, (WB_VSCROLL | WB_DRAG)));

            m_pVScroll->Show();

            m_pVScroll->SetScrollHdl(aLink);

        }

    }

    if ( bHasHoriBar || bHasVertBar )

    {

        SetStyle( GetStyle() | WB_CLIPCHILDREN );

    }

    mnScrWidth = Application::GetSettings().GetStyleSettings().GetScrollBarSize();

    ImplInitSettings();

    // if the tabpage is drawn (ie filled) by a native widget, make sure all controls will have transparent background

    // otherwise they will paint with a wrong background

    if( IsNativeControlSupported(ControlType::TabBody, ControlPart::Entire) && GetParent() && (GetParent()->GetType() == WindowType::TABCONTROL) )

        EnableChildTransparentMode();

}

void TabPage::ImplInitSettings()

{

    vcl::Window* pParent = GetParent();

    if (pParent && pParent->IsChildTransparentModeEnabled() && !IsControlBackground())

    {

        EnableChildTransparentMode();

        SetParentClipMode( ParentClipMode::NoClip );

        SetPaintTransparent( true );

        SetBackground();

    }

    else

    {

        EnableChildTransparentMode( false );

        SetParentClipMode();

        SetPaintTransparent( false );

        if (IsControlBackground() || !pParent)

            SetBackground( GetControlBackground() );

        else

            SetBackground( pParent->GetBackground() );

    }

}

TabPage::TabPage( vcl::Window* pParent, WinBits nStyle ) :

    Window( WindowType::TABPAGE )

{

    ImplInit( pParent, nStyle );

}

Unexecuted instantiation: TabPage::TabPage(vcl::Window*, long)

Unexecuted instantiation: TabPage::TabPage(vcl::Window*, long)

TabPage::~TabPage()

{

    disposeOnce();

}

void TabPage::dispose()

{

    m_pVScroll.disposeAndClear();

    m_pHScroll.disposeAndClear();

    vcl::Window::dispose();

}

void TabPage::StateChanged( StateChangedType nType )

{

    Window::StateChanged( nType );

    if ( nType == StateChangedType::InitShow )

    {

        if (GetSettings().GetStyleSettings().GetAutoMnemonic())

            GenerateAutoMnemonicsOnHierarchy(this);

        // FIXME: no layouting, workaround some clipping issues

        ImplAdjustNWFSizes();

    }

    else if ( nType == StateChangedType::ControlBackground )

    {

        ImplInitSettings();

        Invalidate();

    }

}

void TabPage::DataChanged( const DataChangedEvent& rDCEvt )

{

    Window::DataChanged( rDCEvt );

    if ( (rDCEvt.GetType() == DataChangedEventType::SETTINGS) &&

         (rDCEvt.GetFlags() & AllSettingsFlags::STYLE) )

    {

        ImplInitSettings();

        Invalidate();

    }

}

void TabPage::Paint( vcl::RenderContext& rRenderContext, const tools::Rectangle& )

{

    // draw native tabpage only inside tabcontrols, standalone tabpages look ugly (due to bad dialog design)

    if( !(IsNativeControlSupported(ControlType::TabBody, ControlPart::Entire) && GetParent() && (GetParent()->GetType() == WindowType::TABCONTROL)) )

        return;

    const ImplControlValue aControlValue;

    ControlState nState = ControlState::ENABLED;

    if ( !IsEnabled() )

        nState &= ~ControlState::ENABLED;

    if ( HasFocus() )

        nState |= ControlState::FOCUSED;

    // pass the whole window region to NWF as the tab body might be a gradient or bitmap

    // that has to be scaled properly, clipping makes sure that we do not paint too much

    tools::Rectangle aCtrlRegion( Point(), GetOutputSizePixel() );

    rRenderContext.DrawNativeControl( ControlType::TabBody, ControlPart::Entire, aCtrlRegion, nState,

            aControlValue, OUString() );

}

void TabPage::Draw( OutputDevice* pDev, const Point& rPos, SystemTextColorFlags )

{

    Point aPos = pDev->LogicToPixel( rPos );

    Size aSize = GetSizePixel();

    Wallpaper aWallpaper = GetBackground();

    if ( !aWallpaper.IsBitmap() )

        ImplInitSettings();

    auto popIt = pDev->ScopedPush();

    pDev->SetMapMode();

    pDev->SetLineColor();

    if ( aWallpaper.IsBitmap() )

        pDev->DrawBitmap( aPos, aSize, aWallpaper.GetBitmap() );

    else

    {

        if( aWallpaper.GetColor() == COL_AUTO )

            pDev->SetFillColor( GetSettings().GetStyleSettings().GetDialogColor() );

        else

            pDev->SetFillColor( aWallpaper.GetColor() );

        pDev->DrawRect( tools::Rectangle( aPos, aSize ) );

    }

}

Size TabPage::GetOptimalSize() const

{

    if (isLayoutEnabled(this))

        return VclContainer::getLayoutRequisition(*GetWindow(GetWindowType::FirstChild));

    return getLegacyBestSizeForChildren(*this);

}

void TabPage::SetPosSizePixel(const Point& rAllocPos, const Size& rAllocation)

{

    Window::SetPosSizePixel(rAllocPos, rAllocation);

    if (isLayoutEnabled(this) && rAllocation.Width() && rAllocation.Height())

        VclContainer::setLayoutAllocation(*GetWindow(GetWindowType::FirstChild), Point(0, 0), rAllocation);

}

void TabPage::SetSizePixel(const Size& rAllocation)

{

    Window::SetSizePixel(rAllocation);

    if (isLayoutEnabled(this) && rAllocation.Width() && rAllocation.Height())

        VclContainer::setLayoutAllocation(*GetWindow(GetWindowType::FirstChild), Point(0, 0), rAllocation);

}

void TabPage::SetPosPixel(const Point& rAllocPos)

{

    Window::SetPosPixel(rAllocPos);

    Size aAllocation(GetOutputSizePixel());

    if (isLayoutEnabled(this) && aAllocation.Width() && aAllocation.Height())

    {

        VclContainer::setLayoutAllocation(*GetWindow(GetWindowType::FirstChild), Point(0, 0), aAllocation);

    }

}

void TabPage::lcl_Scroll( tools::Long nX, tools::Long nY )

{

    tools::Long nXScroll = mnScrollPos.X() - nX;

    tools::Long nYScroll = mnScrollPos.Y() - nY;

    mnScrollPos = Point( nX, nY );

    tools::Rectangle aScrollableArea( 0, 0, maScrollArea.Width(), maScrollArea.Height() );

    Scroll(nXScroll, nYScroll, aScrollableArea );

    // Manually scroll all children ( except the scrollbars )

    for ( int index = 0; index < GetChildCount(); ++index )

    {

        vcl::Window* pChild = GetChild( index );

        if ( pChild && pChild != m_pVScroll.get() && pChild != m_pHScroll.get() )

        {

            Point aPos = pChild->GetPosPixel();

            aPos += Point( nXScroll, nYScroll );

            pChild->SetPosPixel( aPos );

        }

    }

}

IMPL_LINK( TabPage, ScrollBarHdl, ScrollBar*, pSB, void )

{

    sal_uInt16 nPos = static_cast<sal_uInt16>(pSB->GetThumbPos());

    if( pSB == m_pVScroll.get() )

        lcl_Scroll(mnScrollPos.X(), nPos );

    else if( pSB == m_pHScroll.get() )

        lcl_Scroll(nPos, mnScrollPos.Y() );

}

void TabPage::SetScrollTop( tools::Long nTop )

{

    Point aOld = mnScrollPos;

    lcl_Scroll( mnScrollPos.X() , mnScrollPos.Y() - nTop );

    if( m_pHScroll )

        m_pHScroll->SetThumbPos( 0 );

    // new pos is 0,0

    mnScrollPos = aOld;

}

void TabPage::SetScrollLeft( tools::Long nLeft )

{

    Point aOld = mnScrollPos;

    lcl_Scroll( mnScrollPos.X() - nLeft , mnScrollPos.Y() );

    if( m_pVScroll )

        m_pVScroll->SetThumbPos( 0 );

    // new pos is 0,0

    mnScrollPos = aOld;

}

void TabPage::SetScrollWidth( tools::Long nWidth )

{

    maScrollArea.setWidth( nWidth );

    ResetScrollBars();

}

void TabPage::SetScrollHeight( tools::Long nHeight )

{

    maScrollArea.setHeight( nHeight );

    ResetScrollBars();

}

void TabPage::Resize()

{

    ResetScrollBars();

}

void TabPage::ResetScrollBars()

{

    Size aOutSz = GetOutputSizePixel();

    Point aVPos( aOutSz.Width() - mnScrWidth, 0 );

    Point aHPos( 0, aOutSz.Height() - mnScrWidth );

    if( m_pVScroll )

    {

        m_pVScroll->SetPosSizePixel( aVPos, Size( mnScrWidth,  GetSizePixel().Height() - mnScrWidth ) );

        m_pVScroll->SetRangeMax( maScrollArea.Height() + mnScrWidth );

        m_pVScroll->SetVisibleSize( GetSizePixel().Height() );

    }

    if( m_pHScroll )

    {

        m_pHScroll->SetPosSizePixel( aHPos, Size(  GetSizePixel().Width() - mnScrWidth, mnScrWidth ) );

        m_pHScroll->SetRangeMax( maScrollArea.Width() + mnScrWidth  );

        m_pHScroll->SetVisibleSize( GetSizePixel().Width() );

    }

}

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