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#ifndef SARIBBONPANNELLAYOUT_H
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#define SARIBBONPANNELLAYOUT_H
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#include "SARibbonGlobal.h"
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#include <QLayout>
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#include "SARibbonPannelItem.h"
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class QToolButton;
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class SARibbonPannel;
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class SARibbonPannelLabel;
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/**
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* @brief 针对SARibbonPannel的布局
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*
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* SARibbonPannelLayout实际是一个列布局，每一列有2~3行，看窗口定占几行
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*
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* 核心函数： @ref SARibbonPannelLayout::createItem
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*
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* @note QLayout::contentsMargins 函数不会启作用,如果要设置contentsMargins，使用@sa setPannelContentsMargins
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*/
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class SA_RIBBON_EXPORT SARibbonPannelLayout : public QLayout
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{
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Q_OBJECT
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friend class SARibbonPannel;
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public:
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SARibbonPannelLayout(QWidget* p = 0);
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~SARibbonPannelLayout();
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// SARibbonPannelLayout additem 无效
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void addItem(QLayoutItem* item) Q_DECL_OVERRIDE;
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// QLayout 所必须的重载函数
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QLayoutItem* itemAt(int index) const Q_DECL_OVERRIDE;
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QLayoutItem* takeAt(int index) Q_DECL_OVERRIDE;
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int count() const Q_DECL_OVERRIDE;
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bool isEmpty() const Q_DECL_OVERRIDE;
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void invalidate() Q_DECL_OVERRIDE;
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Qt::Orientations expandingDirections() const Q_DECL_OVERRIDE;
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void setGeometry(const QRect& rect) Q_DECL_OVERRIDE;
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QSize minimumSize() const Q_DECL_OVERRIDE;
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QSize sizeHint() const Q_DECL_OVERRIDE;
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// 获取ribbonpannel
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SARibbonPannel* ribbonPannel() const;
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// SARibbonPannel主要通过此函数来添加action
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void insertAction(int index, QAction* act, SARibbonPannelItem::RowProportion rp = SARibbonPannelItem::None);
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// 设置OptionAction，如果要去除，传入nullptr指针即可
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void setOptionAction(QAction* action);
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bool isHaveOptionAction() const;
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// 通过action获取SARibbonPannelItem
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SARibbonPannelItem* pannelItem(QAction* action) const;
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// 获取最后一个添加的item
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SARibbonPannelItem* lastItem() const;
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// 获取最后生成的窗口
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QWidget* lastWidget() const;
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// 移动两个item
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void move(int from, int to);
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// 判断是否需要重新布局
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bool isDirty() const;
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// 更新尺寸
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void updateGeomArray();
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// 通过action获取SARibbonPannelItem的索引
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int indexByAction(QAction* action) const;
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// 标题高度
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int pannelTitleHeight() const;
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void setPannelTitleHeight(int newTitleHeight);
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// 判断是否存在标题
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bool isEnableShowPannelTitle() const;
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void setEnableShowPannelTitle(bool on);
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// 返回大按钮的高度
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int largeButtonHeight() const;
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// 标题区域和按钮的间隔
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int pannelTitleSpace() const;
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void setPannelTitleSpace(int newTitleSpace);
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// pannel 标题的label
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SARibbonPannelLabel* pannelTitleLabel() const;
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protected:
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// 获取optionAction 按钮尺寸
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QSize optionActionButtonSize() const;
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// 布局action
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void doLayout();
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// 把action转换为item，对于纯Action，此函数会创建SARibbonToolButton,
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// rp用于告诉Layout生成什么样的窗口，详细见SARibbonPannelItem::RowProportion
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SARibbonPannelItem* createItem(QAction* action, SARibbonPannelItem::RowProportion rp = SARibbonPannelItem::None);
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void updateGeomArray(const QRect& setrect);
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// 重新计算扩展条码，此函数必须在updateGeomArray函数之后调用
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void recalcExpandGeomArray(const QRect& setrect);
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// 返回optionActionButton的尺寸
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private:
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// 根据列数，计算窗口的宽度，以及最大宽度
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void columnWidthInfo(int colindex, int& width, int& maximum) const;
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// 设置titlelabel
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void setPannelTitleLabel(SARibbonPannelLabel* newTitleLabel);
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private:
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QList< SARibbonPannelItem* > m_items;
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int m_columnCount { 0 }; ///< 记录有多少列
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bool m_expandFlag { false }; ///< 标记是否是会扩展的
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QSize m_sizeHint; ///< sizeHint返回的尺寸
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bool m_dirty { true }; ///< 用于标记是否需要刷新元素，参考QToolBarLayout源码
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int m_largeHeight { 0 }; ///< 记录大图标的高度
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int m_titleHeight { 15 }; ///< 标题区域高度
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int m_titleSpace { 2 }; ///< 标题区域和按钮的间隔
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bool m_enableShowTitle { true }; ///< 是否运行显示pannel标题
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SARibbonPannelLabel* m_titleLabel { nullptr }; ///< titlelabel指针
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QRect m_titleLabelGeometry; ///< titlelabel的位置
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QToolButton* m_optionActionBtn { nullptr }; ///< optionAction对应的button
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QRect m_optionActionBtnGeometry; ///< optionAction的位置
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};
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#endif // SARIBBONPANNELLAYOUT_H
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