button.hxx

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/* -*- 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 <vcl/dllapi.h>
#include <vcl/image.hxx>
#include <vcl/ctrl.hxx>
#include <vcl/vclenum.hxx>
#include <memory>
#include <vector>

namespace com::sun::star::frame { struct FeatureStateEvent; }
template <class T> class VclPtr;

class Color;
class ImplCommonButtonData;
enum class DrawButtonFlags;

class VCL_DLLPUBLIC Button : public Control
{
private:
    std::unique_ptr<ImplCommonButtonData> mpButtonData;
    Link<Button*,void> maClickHdl;

    OUString maCommand;

                                    Button (const Button &) = delete;
                                    Button & operator= (const Button &) = delete;
public:
    SAL_DLLPRIVATE DrawTextFlags    ImplGetTextStyle( WinBits nWinStyle, SystemTextColorFlags nSystemTextColorFlags ) const;
    SAL_DLLPRIVATE void             ImplDrawAlignedImage(OutputDevice* pDev, Point& rPos, Size& rSize,
                                              sal_Int32 nImageSep,
                                              DrawTextFlags nTextStyle, tools::Rectangle *pSymbolRect=nullptr, bool bAddImageSep = false );
    SAL_DLLPRIVATE void             ImplSetFocusRect( const tools::Rectangle &rFocusRect );
    SAL_DLLPRIVATE const tools::Rectangle& ImplGetFocusRect() const;
    SAL_DLLPRIVATE void             ImplSetSymbolAlign( SymbolAlign eAlign );
    SAL_DLLPRIVATE tools::Long             ImplGetSeparatorX() const;
    SAL_DLLPRIVATE void             ImplSetSeparatorX( tools::Long nX );

protected:
    explicit            Button( WindowType nType );

    // for drawing RadioButton or CheckButton that has Text and/or Image
    SAL_DLLPRIVATE void ImplDrawRadioCheck(OutputDevice* pDev, WinBits nWinStyle, SystemTextColorFlags nSystemTextColorFlags,
                                           const Point& rPos, const Size& rSize,
                                           const Size& rImageSize, tools::Rectangle& rStateRect,
                                           tools::Rectangle& rMouseRect);
    SAL_DLLPRIVATE tools::Long ImplGetImageToTextDistance() const;

public:
    virtual            ~Button() override;
    virtual void        dispose() override;

    virtual void        Click();

    void                SetClickHdl( const Link<Button*,void>& rLink ) { maClickHdl = rLink; }
    const Link<Button*,void>& GetClickHdl() const { return maClickHdl; }

    void                SetCommandHandler(const OUString& aCommand);
    OUString const &    GetCommand() const { return maCommand; }

    void                SetModeImage( const Image& rImage );
    Image const &       GetModeImage( ) const;
    bool                HasImage() const;
    void                SetImageAlign( ImageAlign eAlign );
    ImageAlign          GetImageAlign() const;
    DrawButtonFlags     GetButtonState() const;
    DrawButtonFlags&    GetButtonState();

    void                SetCustomButtonImage( const Image& rImage );
    Image const &       GetCustomButtonImage() const;

    bool                IsSmallSymbol() const;
    void                SetSmallSymbol();
    virtual bool        set_property(const OString &rKey, const OUString &rValue) override;

    virtual void        statusChanged(const css::frame::FeatureStateEvent& rEvent);

    virtual FactoryFunction GetUITestFactory() const override;

    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;

protected:

    DECL_DLLPRIVATE_STATIC_LINK(Button, dispatchCommandHandler, Button*, void);
};

enum class PushButtonDropdownStyle
{
    NONE            = 0x0000,
    MenuButton      = 0x0002, //visual down arrow
    SplitMenuButton = 0x0003, //visual down arrow and separator line
};

class VCL_DLLPUBLIC PushButton : public Button
{
public:
    SAL_DLLPRIVATE void            ImplSetDefButton( bool bSet );
    SAL_DLLPRIVATE void            ImplDrawPushButtonFrame(vcl::RenderContext& rRenderContext, tools::Rectangle& rRect, DrawButtonFlags nStyle);
    SAL_DLLPRIVATE static bool     ImplHitTestPushButton(vcl::Window const * pDev, const Point& rPos);
    SAL_DLLPRIVATE bool            ImplIsDefButton() const;

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

    virtual void    MouseButtonDown( const MouseEvent& rMEvt ) override;
    virtual void    Tracking( const TrackingEvent& rTEvt ) override;
    virtual void    KeyInput( const KeyEvent& rKEvt ) override;
    virtual void    KeyUp( 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    Resize() override;
    virtual void    GetFocus() override;
    virtual void    LoseFocus() override;
    virtual void    StateChanged( StateChangedType nType ) override;
    virtual void    DataChanged( const DataChangedEvent& rDCEvt ) override;
    virtual bool    PreNotify( NotifyEvent& rNEvt ) override;

    void            Toggle();

    void            SetSymbol( SymbolType eSymbol );
    SymbolType      GetSymbol() const { return meSymbol; }
    void            SetSymbolAlign( SymbolAlign eAlign );

    void            SetDropDown( PushButtonDropdownStyle nStyle );

    void            SetState( TriState eState );
    TriState        GetState() const { return meState; }
    virtual void    statusChanged(const css::frame::FeatureStateEvent& rEvent) override;

    void            Check( bool bCheck = true );
    bool            IsChecked() const;

    void            SetPressed( bool bPressed );
    bool            IsPressed() const { return mbPressed; }

    void            EndSelection();

    Size            CalcMinimumSize() const;
    virtual Size    GetOptimalSize() const override;

    virtual bool    set_property(const OString &rKey, const OUString &rValue) override;
    virtual void    ShowFocus(const tools::Rectangle& rRect) override;

    void setAction(bool bIsAction)
    {
        mbIsAction = bIsAction;
    }

    bool isAction() const
    {
        return mbIsAction;
    }

protected:
    PushButtonDropdownStyle mnDDStyle;
    bool            mbIsActive;

    SAL_DLLPRIVATE void            ImplInitPushButtonData();
    SAL_DLLPRIVATE static WinBits  ImplInitStyle( const vcl::Window* pPrevWindow, WinBits nStyle );
    SAL_DLLPRIVATE void            ImplInitSettings( bool bBackground );
    SAL_DLLPRIVATE void            ImplDrawPushButtonContent(OutputDevice* pDev, SystemTextColorFlags nSystemTextColorFlags,
                                                             const tools::Rectangle& rRect, bool bMenuBtnSep,
                                                             DrawButtonFlags nButtonFlags);
    SAL_DLLPRIVATE void            ImplDrawPushButton(vcl::RenderContext& rRenderContext);
    using Button::ImplGetTextStyle;
    SAL_DLLPRIVATE DrawTextFlags   ImplGetTextStyle( SystemTextColorFlags nSystemTextColorFlags ) const;
    SAL_DLLPRIVATE bool            IsSymbol() const { return ( (meSymbol != SymbolType::DONTKNOW) && (meSymbol != SymbolType::IMAGE) ); }

                                   PushButton( const PushButton & ) = delete;
                                   PushButton& operator=( const PushButton & )
                                       = delete;

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

    using Control::ImplInitSettings;
    using Window::ImplInit;

    explicit        PushButton( WindowType nType );

    virtual void    FillLayoutData() const override;
    virtual const vcl::Font&
                    GetCanonicalFont( const StyleSettings& _rStyle ) const override;
    virtual const Color&
                    GetCanonicalTextColor( const StyleSettings& _rStyle ) const override;

private:
    SymbolType      meSymbol;
    TriState        meState;
    bool            mbPressed;
    bool            mbIsAction;
};

inline void PushButton::Check( bool bCheck )
{
    SetState( bCheck ? TRISTATE_TRUE : TRISTATE_FALSE );
}

inline bool PushButton::IsChecked() const
{
    return (GetState() == TRISTATE_TRUE);
}

class VCL_DLLPUBLIC OKButton final : public PushButton
{
private:
    using PushButton::ImplInit;

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

                                   OKButton (const OKButton &) = delete;
                                   OKButton & operator= (const OKButton &) = delete;

public:
    explicit        OKButton( vcl::Window* pParent, WinBits nStyle = WB_DEFBUTTON );

    virtual void    Click() override;
};

class VCL_DLLPUBLIC CancelButton : public PushButton
{
protected:
    using PushButton::ImplInit;
private:
    SAL_DLLPRIVATE void ImplInit( vcl::Window* pParent, WinBits nStyle );

                        CancelButton (const CancelButton &) = delete;
                        CancelButton & operator= (const CancelButton &) = delete;

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

    virtual void    Click() override;
};

class CloseButton final : public CancelButton
{
public:
    explicit CloseButton(vcl::Window* pParent);
};

class VCL_DLLPUBLIC HelpButton final : public PushButton
{
private:
    using PushButton::ImplInit;
    SAL_DLLPRIVATE void ImplInit( vcl::Window* pParent, WinBits nStyle );

                        HelpButton( const HelpButton & ) = delete;
                        HelpButton & operator= ( const HelpButton & ) = delete;

    virtual void    StateChanged( StateChangedType nStateChange ) override;

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

    virtual void    Click() override;
};

class VCL_DLLPUBLIC CheckBox : public Button
{
private:
    tools::Rectangle       maStateRect;
    tools::Rectangle       maMouseRect;
    TriState        meState;
    bool            mbTriState;
    Link<CheckBox&,void> maToggleHdl;
    SAL_DLLPRIVATE void         ImplInitCheckBoxData();
    SAL_DLLPRIVATE static WinBits ImplInitStyle( const vcl::Window* pPrevWindow, WinBits nStyle );
    SAL_DLLPRIVATE void         ImplInitSettings( bool bBackground );
    SAL_DLLPRIVATE void         ImplDraw( OutputDevice* pDev, SystemTextColorFlags nSystemTextColorFlags,
                                    const Point& rPos, const Size& rSize,
                                    const Size& rImageSize, tools::Rectangle& rStateRect,
                                    tools::Rectangle& rMouseRect );
    SAL_DLLPRIVATE void         ImplDrawCheckBox(vcl::RenderContext& rRenderContext );
    SAL_DLLPRIVATE Size         ImplGetCheckImageSize() const;

                                CheckBox(const CheckBox &) = delete;
                                CheckBox& operator= (const CheckBox &) = delete;

protected:
    using Control::ImplInitSettings;
    using Window::ImplInit;
    SAL_DLLPRIVATE void         ImplInit( vcl::Window* pParent, WinBits nStyle );
    virtual void                FillLayoutData() const override;
    virtual const vcl::Font&    GetCanonicalFont( const StyleSettings& _rStyle ) const override;
    virtual const Color&        GetCanonicalTextColor( const StyleSettings& _rStyle ) const override;
    void                        ImplAdjustNWFSizes() override;

    virtual void ImplDrawCheckBoxState(vcl::RenderContext& rRenderContext);
    SAL_DLLPRIVATE const tools::Rectangle& GetStateRect() const { return maStateRect; }
    SAL_DLLPRIVATE const tools::Rectangle& GetMouseRect() const { return maMouseRect; }

public:
    SAL_DLLPRIVATE void         ImplCheck();
public:
    explicit        CheckBox( vcl::Window* pParent, WinBits nStyle = 0 );

    virtual void    MouseButtonDown( const MouseEvent& rMEvt ) override;
    virtual void    Tracking( const TrackingEvent& rTEvt ) override;
    virtual void    KeyInput( const KeyEvent& rKEvt ) override;
    virtual void    KeyUp( 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    Resize() override;
    virtual void    GetFocus() override;
    virtual void    LoseFocus() override;
    virtual void    StateChanged( StateChangedType nType ) override;
    virtual void    DataChanged( const DataChangedEvent& rDCEvt ) override;
    virtual bool    PreNotify( NotifyEvent& rNEvt ) override;

    void            Toggle();

    void            SetState( TriState eState );
    TriState        GetState() const { return meState; }

    void            Check( bool bCheck = true )
    {
        SetState( bCheck ? TRISTATE_TRUE : TRISTATE_FALSE );
    }

    bool            IsChecked() const
    {
        return (GetState() == TRISTATE_TRUE);
    }

    void            EnableTriState( bool bTriState = true );
    bool            IsTriStateEnabled() const { return mbTriState; }

    static Image    GetCheckImage( const AllSettings& rSettings, DrawButtonFlags nFlags );

    Size            CalcMinimumSize( tools::Long nMaxWidth = 0 ) const;
    virtual Size    GetOptimalSize() const override;

    void            SetToggleHdl( const Link<CheckBox&,void>& rLink ) { maToggleHdl = rLink; }

    virtual bool set_property(const OString &rKey, const OUString &rValue) override;
    virtual void ShowFocus(const tools::Rectangle& rRect) override;

    void DumpAsPropertyTree(tools::JsonWriter&) override;

    virtual FactoryFunction GetUITestFactory() const override;
};

class VCL_DLLPUBLIC RadioButton : public Button
{
private:
    friend class VclBuilder;

    std::shared_ptr< std::vector< VclPtr< RadioButton > > > m_xGroup;
    tools::Rectangle       maStateRect;
    tools::Rectangle       maMouseRect;
    Image           maImage;
    bool            mbChecked;
    bool            mbRadioCheck;
    bool            mbStateChanged;
    bool            mbUsesExplicitGroup;
    Link<RadioButton&,void> maToggleHdl;
    SAL_DLLPRIVATE void     ImplInitRadioButtonData();
    SAL_DLLPRIVATE WinBits  ImplInitStyle( const vcl::Window* pPrevWindow, WinBits nStyle ) const;
    SAL_DLLPRIVATE void     ImplInitSettings( bool bBackground );
    SAL_DLLPRIVATE void     ImplDrawRadioButtonState(vcl::RenderContext& rRenderContext);
    SAL_DLLPRIVATE void     ImplDraw( OutputDevice* pDev, SystemTextColorFlags nSystemTextColorFlags,
                              const Point& rPos, const Size& rSize,
                              const Size& rImageSize, tools::Rectangle& rStateRect,
                              tools::Rectangle& rMouseRect );
    SAL_DLLPRIVATE void     ImplDrawRadioButton(vcl::RenderContext& rRenderContext );
    SAL_DLLPRIVATE void     ImplUncheckAllOther();
    SAL_DLLPRIVATE Size     ImplGetRadioImageSize() const;

                            RadioButton(const RadioButton &) = delete;
                            RadioButton& operator= (const RadioButton &) = delete;

protected:
    using Control::ImplInitSettings;
    using Window::ImplInit;
    SAL_DLLPRIVATE void     ImplInit( vcl::Window* pParent, WinBits nStyle );

public:
    SAL_DLLPRIVATE void     ImplCallClick( bool bGrabFocus = false, GetFocusFlags nFocusFlags = GetFocusFlags::NONE );

protected:
    virtual void    FillLayoutData() const override;
    virtual const vcl::Font&
                    GetCanonicalFont( const StyleSettings& _rStyle ) const override;
    virtual const Color&
                    GetCanonicalTextColor( const StyleSettings& _rStyle ) const override;
    void            ImplAdjustNWFSizes() override;

public:
    /*
     bUsesExplicitGroup of true means that group() is used to set what radiobuttons are part of a group
     while false means that contiguous radiobuttons are considered part of a group where WB_GROUP designates
     the start of the group and all contiguous radiobuttons without WB_GROUP set form the rest of the group.

     true is fairly straightforward, false leads to trick situations and is the legacy case
    */
    explicit        RadioButton(vcl::Window* pParent, bool bUsesExplicitGroup, WinBits nWinStyle);
    virtual         ~RadioButton() override;
    virtual void    dispose() override;

    virtual void    MouseButtonDown( const MouseEvent& rMEvt ) override;
    virtual void    Tracking( const TrackingEvent& rTEvt ) override;
    virtual void    KeyInput( const KeyEvent& rKEvt ) override;
    virtual void    KeyUp( 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    Resize() override;
    virtual void    GetFocus() override;
    virtual void    LoseFocus() override;
    virtual void    StateChanged( StateChangedType nType ) override;
    virtual void    DataChanged( const DataChangedEvent& rDCEvt ) override;
    virtual bool    PreNotify( NotifyEvent& rNEvt ) override;

    void            Toggle();

    bool            IsStateChanged() const { return mbStateChanged; }

    void            EnableRadioCheck( bool bRadioCheck ) { mbRadioCheck = bRadioCheck; }
    bool            IsRadioCheckEnabled() const { return mbRadioCheck; }

    void            SetModeRadioImage( const Image& rImage );

    void            SetState( bool bCheck );
    void            Check( bool bCheck = true );
    bool            IsChecked() const { return mbChecked; }

    static Image    GetRadioImage( const AllSettings& rSettings, DrawButtonFlags nFlags );

    Size            CalcMinimumSize( tools::Long nMaxWidth = 0 ) const;
    virtual Size    GetOptimalSize() const override;

    void            SetToggleHdl( const Link<RadioButton&,void>& rLink ) { maToggleHdl = rLink; }

    std::vector<VclPtr<RadioButton> > GetRadioButtonGroup(bool bIncludeThis = true) const;

    virtual bool set_property(const OString &rKey, const OUString &rValue) override;

    /*
     * Group this RadioButton with another
     */
    void group(RadioButton &rOther);
    virtual void ShowFocus(const tools::Rectangle& rRect) override;

    void DumpAsPropertyTree(tools::JsonWriter&) override;

    virtual FactoryFunction GetUITestFactory() const override;
};

class VCL_DLLPUBLIC ImageButton final : public PushButton
{
private:
    using PushButton::ImplInitStyle;

    SAL_DLLPRIVATE void     ImplInitStyle();

                            ImageButton( const ImageButton & ) = delete;
                            ImageButton & operator= ( const ImageButton & ) = delete;

public:
                 ImageButton( vcl::Window* pParent, WinBits nStyle = 0 );
};

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