彻底改版2.0

third/3rd_qwt/qwt_dyngrid_layout.h

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+/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
+ * Qwt Widget Library
+ * Copyright (C) 1997   Josef Wilgen
+ * Copyright (C) 2002   Uwe Rathmann
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the Qwt License, Version 1.0
+ *****************************************************************************/
+
+#ifndef QWT_DYNGRID_LAYOUT_H
+#define QWT_DYNGRID_LAYOUT_H
+
+#include "qwt_global.h"
+#include <qlayout.h>
+#include <qsize.h>
+#include <qlist.h>
+
+/*!
+  \brief The QwtDynGridLayout class lays out widgets in a grid,
+         adjusting the number of columns and rows to the current size.
+
+  QwtDynGridLayout takes the space it gets, divides it up into rows and
+  columns, and puts each of the widgets it manages into the correct cell(s).
+  It lays out as many number of columns as possible (limited by maxColumns()).
+*/
+
+class QWT_EXPORT QwtDynGridLayout : public QLayout
+{
+    Q_OBJECT
+public:
+    explicit QwtDynGridLayout( QWidget *, int margin = 0, int spacing = -1 );
+    explicit QwtDynGridLayout( int spacing = -1 );
+
+    virtual ~QwtDynGridLayout();
+
+    virtual void invalidate();
+
+    void setMaxColumns( uint maxColumns );
+    uint maxColumns() const;
+
+    uint numRows () const;
+    uint numColumns () const;
+
+    virtual void addItem( QLayoutItem * );
+
+    virtual QLayoutItem *itemAt( int index ) const;
+    virtual QLayoutItem *takeAt( int index );
+    virtual int count() const;
+
+    void setExpandingDirections( Qt::Orientations );
+    virtual Qt::Orientations expandingDirections() const;
+    QList<QRect> layoutItems( const QRect &, uint numColumns ) const;
+
+    virtual int maxItemWidth() const;
+
+    virtual void setGeometry( const QRect &rect );
+
+    virtual bool hasHeightForWidth() const;
+    virtual int heightForWidth( int ) const;
+
+    virtual QSize sizeHint() const;
+
+    virtual bool isEmpty() const;
+    uint itemCount() const;
+
+    virtual uint columnsForWidth( int width ) const;
+
+protected:
+
+    void layoutGrid( uint numColumns,
+        QVector<int>& rowHeight, QVector<int>& colWidth ) const;
+    void stretchGrid( const QRect &rect, uint numColumns,
+        QVector<int>& rowHeight, QVector<int>& colWidth ) const;
+
+private:
+    void init();
+    int maxRowWidth( int numColumns ) const;
+
+    class PrivateData;
+    PrivateData *d_data;
+};
+
+#endif