qwt_figure_layout.h

#ifndef QWT_FIGURE_LAYOUT_H
#define QWT_FIGURE_LAYOUT_H
// stl
#include <memory>
 
// Qt
#include <QLayout>
 
// qwt
#include "qwt_global.h"
 
class QWT_EXPORT QwtFigureLayout : public QLayout
{
    Q_OBJECT
    QWT_DECLARE_PRIVATE(QwtFigureLayout)
public:
    QwtFigureLayout();
    explicit QwtFigureLayout(QWidget* parent);
    virtual ~QwtFigureLayout();
 
    virtual void addItem(QLayoutItem* item) override;
    virtual QLayoutItem* itemAt(int index) const override;
    virtual QLayoutItem* takeAt(int index) override;
    virtual int count() const override;
    virtual QSize sizeHint() const override;
    virtual QSize minimumSize() const override;
    virtual void setGeometry(const QRect& rect) override;
 
    // Add a widget with normalized coordinates/使用归一化坐标添加窗口部件
    void addAxes(QWidget* widget, const QRectF& rect);
 
    // Add a widget with normalized coordinates using separate parameters/使用分离参数和归一化坐标添加窗口部件
    void addAxes(QWidget* widget, qreal left, qreal top, qreal width, qreal height);
 
    // Add a widget by grid layout/添加窗口部件到网格布局
    void addGridAxes(QWidget* widget,
                     int rowCnt,
                     int colCnt,
                     int row,
                     int col,
                     int rowSpan  = 1,
                     int colSpan  = 1,
                     qreal wspace = 0.0,
                     qreal hspace = 0.0);
 
    // 改变已经添加的窗口的位置占比,如果窗口还没添加，此函数无效
    void setAxesNormPos(QWidget* widget, const QRectF& rect);
 
    // Get the normalized rectangle for a widget/获取窗口部件的归一化矩形
    QRectF widgetNormRect(QWidget* widget) const;
 
    // 计算rect相对于parentRect的归一化坐标
    static QRectF calcNormRect(const QRect& parentRect, const QRect& rect);
    // 计算正规矩形
    QRect calcActualRect(const QRect& parentRect, const QRectF& normRect);
 
protected:
    // calc the normalized rectangle for a grid cell/获取网格单元格的归一化矩形
    QRectF calcGridRect(int rowCnt,
                        int colCnt,
                        int row,
                        int col,
                        int rowSpan  = 1,
                        int colSpan  = 1,
                        qreal wspace = 0.0,
                        qreal hspace = 0.0) const;
};
 
#endif  // QWT_FIGURE_LAYOUT_H