class FormWindow::Selection 是什么意思？？

[luhuijk]

class FormWindow::Selection
{
public:
Selection();
~Selection();

// Clear
void clear();

// Also clear out the pool. Call if reparenting of the main container occurs.
void clearSelectionPool();

void repaintSelection(QWidget *w);
void repaintSelection();

bool isWidgetSelected(QWidget *w) const;
QWidgetList selectedWidgets() const;

WidgetSelection *addWidget(FormWindow* fw, QWidget *w);
// remove widget, return new current widget or 0
QWidget* removeWidget(QWidget *w);

void raiseList(const QWidgetList& l);
void raiseWidget(QWidget *w);

void updateGeometry(QWidget *w);

void hide(QWidget *w);
void show(QWidget *w);

private:

typedef QList<WidgetSelection *> SelectionPool;
SelectionPool m_selectionPool;

typedef QHash<QWidget *, WidgetSelection *> SelectionHash;
SelectionHash m_usedSelections;
};

FormWindow::Selection::Selection()
{
}

class FormWindow::Selection{}这样是做什么？我们一般写一个类是
class A
{
public:
A();
~A();
};样啊！

[pengzhixi]

额 Selection是一个嵌套类，嵌套在FormWindow里面

[luhuijk]

谢谢了，主要是在网上不知道输入什么关键字来查！