autolayout.h

#ifndef AUTOLAYOUT_H
#define AUTOLAYOUT_H

#include "layoutbase.h"
#include "compoundwidget.h"

namespace canvascv
{

class AutoLayout : public CompoundWidget
{
public:

    int getPadding() const;

    void setPadding(int value);

    virtual void addWidget(const std::shared_ptr<Widget> &widget);
    virtual std::shared_ptr<Widget> rmvWidget(const std::shared_ptr<Widget> &widget);

    void rmvWidget(int i);

    template <typename T=Widget>
    T *at(int index);

    size_t size() const;

    bool getWrap() const;

    void setWrap(bool value);


    int getMaxWidgetWidth();

    int getMaxWidgetHeight();

protected:

    AutoLayout(const cv::Point& pos);

    void recalcAndAllocate();
    virtual const cv::Rect getBoundaries() const;

    int padding;
    bool wrap;
    int maxWidth;
    int maxHeight;
};

// simplest case is the special case
template<>
Widget *AutoLayout::at(int index);

template<typename T>
T *AutoLayout::at(int index)
{
    Widget *pWidget = nullptr;
    if (index < widgets.size())
    {
        auto i = widgets.begin();
        std::advance(i, index);
        pWidget = i->get();
        assert (pWidget->getType() == T::type);
    }
    return static_cast<T*>(pWidget);
}

}
#endif // AUTOLAYOUT_H