axmol/core/ui/UILayoutManager.h

/****************************************************************************
 Copyright (c) 2013-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

 https://adxeproject.github.io/

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
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 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

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 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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#ifndef __cocos2d_libs__CCLayoutManager__
#define __cocos2d_libs__CCLayoutManager__

#include "base/CCRef.h"
#include "base/CCVector.h"
#include "ui/GUIExport.h"

/**
 * @addtogroup ui
 * @{
 */
NS_CC_BEGIN

namespace ui
{

class LayoutProtocol;
class Widget;
class RelativeLayoutParameter;

/**
 *@brief Base class for managing layout.
 * All the concrete layout manager should inherit from this class.
 */
class CC_GUI_DLL LayoutManager : public Ref
{
public:
    virtual ~LayoutManager(){};
    LayoutManager(){};

    /**
     * The interface does the actual layouting work.
     */
    virtual void doLayout(LayoutProtocol* layout) = 0;

    friend class Layout;
};

/**
 *@brief Linear vertical layouting class.
 * Note: This class is used only by @see `Layout` class.
 * @lua NA
 * @js NA
 */
class CC_GUI_DLL LinearVerticalLayoutManager : public LayoutManager
{
private:
    LinearVerticalLayoutManager(){};
    virtual ~LinearVerticalLayoutManager(){};
    static LinearVerticalLayoutManager* create();
    virtual void doLayout(LayoutProtocol* layout) override;

    friend class Layout;
};

/**
 *@brief Linear horizontal layouting class.
 *Note: This class is used only by @see `Layout` class.
 * @lua NA
 * @js NA
 */
class CC_GUI_DLL LinearHorizontalLayoutManager : public LayoutManager
{
private:
    LinearHorizontalLayoutManager(){};
    virtual ~LinearHorizontalLayoutManager(){};
    static LinearHorizontalLayoutManager* create();
    virtual void doLayout(LayoutProtocol* layout) override;

    friend class Layout;
};

/**
 *@brief Linear vertical layouting class.
 * Note: This class is used only by @see `Layout` class.
 * @lua NA
 * @js NA
 */
class CC_GUI_DLL LinearCenterVerticalLayoutManager : public LayoutManager
{
private:
    LinearCenterVerticalLayoutManager(){};
    virtual ~LinearCenterVerticalLayoutManager(){};
    static LinearCenterVerticalLayoutManager* create();
    virtual void doLayout(LayoutProtocol* layout) override;

    friend class Layout;
};

/**
 *@brief Relative layouting class.
 *Note: This class is used only by `Layout` class.
 * @lua NA
 * @js NA
 */
class CC_GUI_DLL RelativeLayoutManager : public LayoutManager
{
private:
    RelativeLayoutManager()
        : _unlayoutChildCount(0)
        , _widget(nullptr)
        , _finalPositionX(0.0f)
        , _finalPositionY(0.0f)
        , _relativeWidgetLP(nullptr)
    {}
    virtual ~RelativeLayoutManager(){};
    static RelativeLayoutManager* create();
    virtual void doLayout(LayoutProtocol* layout) override;

    Vector<Widget*> getAllWidgets(LayoutProtocol* layout);
    Widget* getRelativeWidget(Widget* widget);
    bool calculateFinalPositionWithRelativeWidget(LayoutProtocol* layout);
    void calculateFinalPositionWithRelativeAlign();

    ssize_t _unlayoutChildCount;
    Vector<Widget*> _widgetChildren;
    Widget* _widget;
    float _finalPositionX;
    float _finalPositionY;

    RelativeLayoutParameter* _relativeWidgetLP;

    friend class Layout;
};

}  // namespace ui

NS_CC_END
// end of ui group
/// @}
#endif /* defined(__cocos2d_libs__CCLayoutManager__) */