/* -*- 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 .

 */

#pragma once

#if !defined(VCL_DLLIMPLEMENTATION) && !defined(TOOLKIT_DLLIMPLEMENTATION) && !defined(VCL_INTERNALS)

#error "don't use this in new code"

#endif

#include <config_options.h>

#include <vcl/dllapi.h>

#include <vcl/ctrl.hxx>

#include <vcl/scrollable.hxx>

#include <memory>

struct ImplScrollBarData;

class UNLESS_MERGELIBS_MORE(VCL_DLLPUBLIC) ScrollBar final : public Control

                              , public Scrollable

{

private:

    tools::Rectangle       maBtn1Rect;

    tools::Rectangle       maBtn2Rect;

    tools::Rectangle       maPage1Rect;

    tools::Rectangle       maPage2Rect;

    tools::Rectangle       maThumbRect;

    tools::Rectangle       maTrackRect;

    std::unique_ptr<ImplScrollBarData> mpData;

    tools::Long            mnStartPos;

    tools::Long            mnMouseOff;

    tools::Long            mnThumbPixRange;

    tools::Long            mnThumbPixPos;

    tools::Long            mnThumbPixSize;

    tools::Long            mnMinRange;

    tools::Long            mnMaxRange;

    tools::Long            mnThumbPos;

    tools::Long            mnVisibleSize;

    tools::Long            mnLineSize;

    tools::Long            mnPageSize;

    tools::Long            mnDelta;

    sal_uInt16      mnStateFlags;

    ScrollType      meScrollType;

    bool            mbCalcSize;

    bool            mbFullDrag;

    bool            mbSwapArrows;

    Link<ScrollBar*,void>       maScrollHdl;

    Link<ScrollBar*,void>       maEndScrollHdl;

    SAL_DLLPRIVATE tools::Rectangle*   ImplFindPartRect( const Point& rPt );

    using Window::ImplInit;

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

    SAL_DLLPRIVATE void         ImplInitStyle( WinBits nStyle );

    SAL_DLLPRIVATE void         ImplUpdateRects( bool bUpdate = true );

    SAL_DLLPRIVATE tools::Long         ImplCalcThumbPos( tools::Long nPixPos ) const;

    SAL_DLLPRIVATE tools::Long         ImplCalcThumbPosPix( tools::Long nPos ) const;

    SAL_DLLPRIVATE void         ImplCalc( bool bUpdate = true );

    SAL_DLLPRIVATE void         ImplDraw(vcl::RenderContext& rRenderContext);

    using Window::ImplScroll;

    SAL_DLLPRIVATE tools::Long         ImplScroll( tools::Long nNewPos, bool bCallEndScroll );

    SAL_DLLPRIVATE tools::Long         ImplDoAction( bool bCallEndScroll );

    SAL_DLLPRIVATE void         ImplDoMouseAction( const Point& rPos, bool bCallAction = true );

    SAL_DLLPRIVATE void         ImplInvert();

    SAL_DLLPRIVATE bool         ImplDrawNative(vcl::RenderContext& rRenderContext, sal_uInt16 SystemTextColorFlags);

    SAL_DLLPRIVATE void         ImplDragThumb( const Point& rMousePos );

    SAL_DLLPRIVATE Size         getCurrentCalcSize() const;

    DECL_DLLPRIVATE_LINK( ImplAutoTimerHdl, Timer*, void );

    bool ImplHitTestBtn1(const Point& rPt) const;

    bool ImplHitTestBtn2(const Point& rPt) const;

    bool ImplHitTestPageUp(const Point& rPt) const;

    bool ImplHitTestPageDown(const Point& rPt) const;

    bool ImplHitTestThumb(const Point& rPt) const;

public:

    explicit        ScrollBar( vcl::Window* pParent, WinBits nStyle = WB_VERT );

    virtual         ~ScrollBar() override;

    virtual void    dispose() override;

    virtual css::uno::Reference<css::accessibility::XAccessible> CreateAccessible() override;

    virtual void MouseButtonDown(const MouseEvent& rMEvt) override;

    virtual void Tracking(const TrackingEvent& rTEvt) override;

    virtual void KeyInput(const KeyEvent& rKEvt) override;

    virtual void Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect) override;

    virtual void Draw(OutputDevice* pDev, const Point& rPos, SystemTextColorFlags nFlags) override;

    virtual void Move() override;

    virtual void Resize() override;

    virtual void StateChanged(StateChangedType nType) override;

    virtual void DataChanged(const DataChangedEvent& rDCEvt) override;

    virtual bool PreNotify(NotifyEvent& rNEvt) override;

    virtual void GetFocus() override;

    virtual void LoseFocus() override;

    virtual void ApplySettings(vcl::RenderContext& rRenderContext) override;

    using Window::Scroll;

    void Scroll();

    void EndScroll();

    tools::Long     DoScroll( tools::Long nNewPos ) override;

    tools::Long     DoScrollAction( ScrollType eScrollType );

    void            EnableDrag() { mbFullDrag = true; }

    void            SetRangeMin( tools::Long nNewRange ) override;

    tools::Long     GetRangeMin() const override { return mnMinRange; }

    void            SetRangeMax( tools::Long nNewRange ) override;

    tools::Long     GetRangeMax() const override { return mnMaxRange; }

    void            SetRange( const Range& rRange ) override;

    Range           GetRange() const override { return Range( GetRangeMin(), GetRangeMax() ); }

    void            SetThumbPos( tools::Long nThumbPos ) override;

    tools::Long     GetThumbPos() const override { return mnThumbPos; }

    void            SetLineSize( tools::Long nNewSize ) override { mnLineSize = nNewSize; }

    tools::Long     GetLineSize() const override { return mnLineSize; }

    void            SetPageSize( tools::Long nNewSize ) override { mnPageSize = nNewSize; }

    tools::Long     GetPageSize() const override { return mnPageSize; }

    void            SetVisibleSize( tools::Long nNewSize ) override;

    tools::Long     GetVisibleSize() const override { return mnVisibleSize; }

    bool Inactive() const override;

    tools::Long     GetDelta() const { return mnDelta; }

    ScrollType      GetType() const { return meScrollType; }

    void            SetScrollHdl( const Link<ScrollBar*,void>& rLink ) { maScrollHdl = rLink; }

    const Link<ScrollBar*,void>&   GetScrollHdl() const { return maScrollHdl; }

    void            SetEndScrollHdl( const Link<ScrollBar*,void>& rLink ) { maEndScrollHdl = rLink; }

    virtual Size    GetOptimalSize() const override;

    void            SetSwapArrows( bool bSwap ) { mbSwapArrows = bSwap; }

    bool            IsHorizontal() const;

    tools::Rectangle GetScrollbarRegion() const;

};

class UNLESS_MERGELIBS(VCL_DLLPUBLIC) ScrollBarBox final : public vcl::Window

{

private:

    using Window::ImplInit;

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

    virtual void ApplySettings(vcl::RenderContext& rRenderContext) override;

public:

    explicit        ScrollBarBox( vcl::Window* pParent, WinBits nStyle = 0 );

    virtual void    StateChanged( StateChangedType nType ) override;

    virtual void    DataChanged( const DataChangedEvent& rDCEvt ) override;

};

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