#pragma once

#include <QMdiArea>

#include "Defines.h"
#include "iPlugin_global.h"

// 主要重载其信号响应
class I_PLUGIN_EXPORT MdiAreaEx :
        public QMdiArea
{
    Q_OBJECT

public:
    MdiAreaEx(QWidget* parent = 0);
    ~MdiAreaEx();

    // 布局
    // bFilterMode二次布局时，如果bFilterMode为true则过滤掉Hide的窗体
    void layoutSubWnds(WndLayoutMode o, bool bFilterMode = false);
    WndLayoutMode getLayoutMode();
    void relayoutSubWnds();

    void setLastAutoSpan(bool b);
    void setColCount(int n);

private:

    // 布局实现
    void _layoutOne(QList<QMdiSubWindow*> listSubWnds);
    void _layoutVert(QList<QMdiSubWindow*> listSubWnds);
    void _layoutHori(QList<QMdiSubWindow*> listSubWnds);
    void _layoutCell(QList<QMdiSubWindow*> listSubWnds);
    void _layoutCascade(QList<QMdiSubWindow*> listSubWnds);

protected:

    bool eventFilter(QObject *object, QEvent *event);
    void childEvent(QChildEvent *childEvent);
    void resizeEvent(QResizeEvent *resizeEvent);
    void timerEvent(QTimerEvent *timerEvent);
    void showEvent(QShowEvent *showEvent);

signals:

    // Mdi大小发生了切换
    void sigMdiSizeChanged();

    // 在布局前允许用户对窗体顺序进行调整
    void sigAdjustSubWnds(QList<QMdiSubWindow*>&);

    // nMode = 0: added 1:removed 2:polished
//    void sigChildActioned(QObject* pChild, int nMode);

protected:

    WndLayoutMode m_oMode;
    bool m_bFilterMode;
    bool m_bLastSpan; //最后一个是否对齐（如果不够的话），默认为true
    int m_nColCount; //默认为2
};