VFrame.h

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#pragma once
 
#include <QWidget>
#include <QFrame>
#include <forward_list>
 
class VFrame : public QFrame {
    Q_OBJECT
 
public:
    VFrame();
 
    void addWidget(QWidget *widget);
 
    int getNumOfChildWidgets() const;
 
    // The following two methods control if a child is shown or hidden.
    // If a child widget is the ith added to this VFrame, then idx should be i-1.
    // It returns 0 upon success, and 1 upon failure (e.g. invalid index).
    int hideChildAtIdx(int idx);
    int showChildAtIdx(int idx);
 
private:
    std::forward_list<QWidget *> _child_widgets;
    int                          _num_of_children = 0;
};