CGUIScrollBarVertical.h

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/* Copyright (C) 2021 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * 0 A.D. 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */

/*
    A GUI Scrollbar, this class doesn't present all functionality
    to the scrollbar, it just controls the drawing and a wrapper
    for interaction with it.
*/

#ifndef INCLUDED_CGUISCROLLBARVERTICAL
#define INCLUDED_CGUISCROLLBARVERTICAL

#include "IGUIScrollBar.h"

/**
 * Vertical implementation of IGUIScrollBar
 *
 * @see IGUIScrollBar
 */
class CGUIScrollBarVertical : public IGUIScrollBar
{
public:
    CGUIScrollBarVertical(CGUI& pGUI);
    virtual ~CGUIScrollBarVertical();

public:
    /**
     * Draw the scroll-bar
     */
    virtual void Draw(CCanvas2D& canvas);

    /**
     * If an object that contains a scrollbar has got messages, send
     * them to the scroll-bar and it will see if the message regarded
     * itself.
     *
     * @see IGUIObject#HandleMessage()
     */
    virtual void HandleMessage(SGUIMessage& Message);

    /**
     * Set m_Pos with g_mouse_x/y input, i.e. when dragging.
     */
    virtual void SetPosFromMousePos(const CVector2D& mouse);

    /**
     * @see IGUIScrollBar#HoveringButtonMinus
     */
    virtual bool HoveringButtonMinus(const CVector2D& mouse);

    /**
     * @see IGUIScrollBar#HoveringButtonPlus
     */
    virtual bool HoveringButtonPlus(const CVector2D& mouse);

    /**
     * Set Right Aligned
     * @param align Alignment
     */
    void SetRightAligned(const bool& align) { m_RightAligned = align; }

    /**
     * Get the rectangle of the actual BAR.
     * @return Rectangle, CRect
     */
    virtual CRect GetBarRect() const;

    /**
     * Get the rectangle of the outline of the scrollbar, every component of the
     * scroll-bar should be inside this area.
     * @return Rectangle, CRect
     */
    virtual CRect GetOuterRect() const;

protected:
    /**
     * Should the scroll bar proceed to the left or to the right of the m_X value.
     * Notice, this has nothing to do with where the owner places it.
     */
    bool m_RightAligned;
};

#endif // INCLUDED_CGUISCROLLBARVERTICAL