SARibbonPanelLayout.h

#ifndef SARIBBONPANELLAYOUT_H
#define SARIBBONPANELLAYOUT_H
#include "SARibbonGlobal.h"
#include <QLayout>
#include "SARibbonPanelItem.h"
class QToolButton;
class SARibbonPanel;
class SARibbonPanelLabel;
 
class SA_RIBBON_EXPORT SARibbonPanelLayout : public QLayout
{
    Q_OBJECT
    friend class SARibbonPanel;
 
public:
    explicit SARibbonPanelLayout(QWidget* p = nullptr);
    ~SARibbonPanelLayout();
    // Gets the SARibbonPanel that owns this layout / 获取拥有此布局的SARibbonPanel
    SARibbonPanel* ribbonPanel() const;
 
    // Inserts an action at a specific index / 在指定索引处插入一个action
    void insertAction(int index, QAction* act, SARibbonPanelItem::RowProportion rp = SARibbonPanelItem::None);
 
    // Sets the option action for the panel / 为面板设置选项action
    void setOptionAction(QAction* action);
 
    // Checks if an option action is set / 检查是否设置了选项action
    bool isHaveOptionAction() const;
 
    // Retrieves the SARibbonPanelItem associated with an action / 获取与action关联的SARibbonPanelItem
    SARibbonPanelItem* panelItem(QAction* action) const;
 
    // Gets the last item added to the layout / 获取最后添加到布局的项目
    SARibbonPanelItem* lastItem() const;
 
    // Gets the widget associated with the last item / 获取与最后一个项目关联的窗口部件
    QWidget* lastWidget() const;
 
    // Moves an item from one index to another / 将一个项目从一个索引移动到另一个索引
    void move(int from, int to);
    // 判断是否需要重新布局
    bool isDirty() const;
    // 更新尺寸
    void updateGeomArray();
 
    // Finds the index of an action in the layout / 在布局中查找一个action的索引
    int indexByAction(QAction* action) const;
 
    // Gets the height of the panel's title / 获取面板标题的高度
    int panelTitleHeight() const;
 
    // Sets the height of the panel's title / 设置面板标题的高度
    void setPanelTitleHeight(int newTitleHeight);
 
    // Checks if the panel's title is enabled for display / 检查面板标题是否启用显示
    bool isEnableShowPanelTitle() const;
 
    // Sets whether the panel's title is enabled for display / 设置面板标题是否启用显示
    void setEnableShowPanelTitle(bool on);
 
    // Gets the height of large buttons / 获取大按钮的高度
    int largeButtonHeight() const;
 
    // Gets the spacing between the title and the buttons / 获取标题与按钮之间的间距
    int panelTitleSpace() const;
 
    // Sets the spacing between the title and the buttons / 设置标题与按钮之间的间距
    void setPanelTitleSpace(int newTitleSpace);
 
    // Gets the panel's title label / 获取面板的标题标签
    SARibbonPanelLabel* panelTitleLabel() const;
 
    // Sets the default icon size for tool buttons / 设置工具按钮的默认图标尺寸
    void setToolButtonIconSize(const QSize& s);
 
    // Gets the default icon size for tool buttons / 获取工具按钮的默认图标尺寸
    QSize toolButtonIconSize() const;
 
    // 是否允许文字换行
    bool isEnableWordWrap() const;
    // 按钮的最大宽高比，这个系数决定按钮的最大宽度
    qreal buttonMaximumAspectRatio() const;
 
public:
    // Adds an item to the layout (SARibbonPanelLayout not supported) / 向布局添加一个项目（SARibbonPanelLayout不支持）
    void addItem(QLayoutItem* item) Q_DECL_OVERRIDE;
 
    // QLayout 所必须的重载函数
    QLayoutItem* itemAt(int index) const Q_DECL_OVERRIDE;
 
    // Removes and returns the item at the specified index / 移除并返回指定索引处的项目
    QLayoutItem* takeAt(int index) Q_DECL_OVERRIDE;
 
    // Gets the number of items in the layout / 获取布局中项目的数量
    int count() const Q_DECL_OVERRIDE;
 
    // Checks if the layout is empty / 检查布局是否为空
    bool isEmpty() const Q_DECL_OVERRIDE;
 
    // Invalidates the layout, marking it as dirty / 使布局失效，将其标记为“脏”
    void invalidate() Q_DECL_OVERRIDE;
 
    // Returns the directions in which the layout can expand / 返回布局可以扩展的方向
    Qt::Orientations expandingDirections() const Q_DECL_OVERRIDE;
    void setGeometry(const QRect& rect) Q_DECL_OVERRIDE;
    QSize minimumSize() const Q_DECL_OVERRIDE;
    QSize sizeHint() const Q_DECL_OVERRIDE;
 
protected:
    // Gets the size of the option action button / 获取选项action按钮的尺寸
    QSize optionActionButtonSize() const;
    // 布局action
    void doLayout();
    // 把action转换为item，对于纯Action，此函数会创建SARibbonToolButton,
    //  rp用于告诉Layout生成什么样的窗口，详细见SARibbonPanelItem::RowProportion
    SARibbonPanelItem* createItem(QAction* action, SARibbonPanelItem::RowProportion rp = SARibbonPanelItem::None);
    void updateGeomArray(const QRect& setrect);
    // 重新计算扩展条码，此函数必须在updateGeomArray函数之后调用
    void recalcExpandGeomArray(const QRect& setrect);
    // 设置文字允许换行
    void setEnableWordWrap(bool on);
    // 按钮的最大宽高比，这个系数决定按钮的最大宽度
    void setButtonMaximumAspectRatio(qreal fac = 1.4);
 
private:
    // 根据列数，计算窗口的宽度，以及最大宽度
    void columnWidthInfo(int colindex, int& width, int& maximum) const;
 
    //  Sets the panel's title label / 设置面板的标题标签
    void setPanelTitleLabel(SARibbonPanelLabel* newTitleLabel);
 
private:
    QList< SARibbonPanelItem* > mItems;
    int mColumnCount { 0 };                       
    bool mExpandFlag { false };                   
    QSize mSizeHint;                              
    QSize mDefaultToolButtonIconSize { 22, 22 };  
    bool mDirty { true };                         
    int mLargeHeight { 0 };                       
    int mTitleHeight { 15 };                      
    int mTitleSpace { 2 };                        
    bool mEnableShowTitle { true };               
    SARibbonPanelLabel* mTitleLabel { nullptr };  
    QRect mTitleLabelGeometry;                    
    QToolButton* mOptionActionBtn { nullptr };    
    QRect mOptionActionBtnGeometry;               
    bool mEnableWordWrap { true };                
    qreal mButtonMaximumAspectRatio { 1.4 };      
};
 
#endif  // SARIBBONPANELLAYOUT_H