[89] | 1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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| 2 | * Qwt Widget Library
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| 3 | * Copyright (C) 1997 Josef Wilgen
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| 4 | * Copyright (C) 2002 Uwe Rathmann
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| 5 | *
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| 6 | * This library is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the Qwt License, Version 1.0
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| 8 | *****************************************************************************/
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| 9 |
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| 10 | #ifndef QWT_DYNGRID_LAYOUT_H
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| 11 | #define QWT_DYNGRID_LAYOUT_H
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| 12 |
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| 13 | #include <qlayout.h>
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| 14 | #include <qsize.h>
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| 15 | #if QT_VERSION >= 0x040000
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| 16 | #include <qlist.h>
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| 17 | #else
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| 18 | #include <qvaluelist.h>
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| 19 | #endif
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| 20 | #include "qwt_global.h"
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| 21 | #include "qwt_array.h"
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| 22 |
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| 23 | /*!
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| 24 | \brief The QwtDynGridLayout class lays out widgets in a grid,
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| 25 | adjusting the number of columns and rows to the current size.
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| 26 |
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| 27 | QwtDynGridLayout takes the space it gets, divides it up into rows and
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| 28 | columns, and puts each of the widgets it manages into the correct cell(s).
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| 29 | It lays out as many number of columns as possible (limited by maxCols()).
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| 30 | */
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| 31 |
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| 32 | class QWT_EXPORT QwtDynGridLayout : public QLayout
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| 33 | {
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| 34 | Q_OBJECT
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| 35 | public:
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| 36 | explicit QwtDynGridLayout(QWidget *, int margin = 0, int space = -1);
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| 37 | #if QT_VERSION < 0x040000
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| 38 | explicit QwtDynGridLayout(QLayout *, int space = -1);
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| 39 | #endif
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| 40 | explicit QwtDynGridLayout(int space = -1);
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| 41 |
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| 42 | virtual ~QwtDynGridLayout();
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| 43 |
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| 44 | virtual void invalidate();
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| 45 |
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| 46 | void setMaxCols(uint maxCols);
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| 47 | uint maxCols() const;
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| 48 |
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| 49 | uint numRows () const;
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| 50 | uint numCols () const;
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| 51 |
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| 52 | virtual void addItem(QLayoutItem *);
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| 53 |
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| 54 | #if QT_VERSION >= 0x040000
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| 55 | virtual QLayoutItem *itemAt( int index ) const;
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| 56 | virtual QLayoutItem *takeAt( int index );
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| 57 | virtual int count() const;
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| 58 |
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| 59 | void setExpandingDirections(Qt::Orientations);
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| 60 | virtual Qt::Orientations expandingDirections() const;
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| 61 | QList<QRect> layoutItems(const QRect &, uint numCols) const;
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| 62 | #else
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| 63 | virtual QLayoutIterator iterator();
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| 64 |
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| 65 | void setExpanding(QSizePolicy::ExpandData);
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| 66 | virtual QSizePolicy::ExpandData expanding() const;
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| 67 | QValueList<QRect> layoutItems(const QRect &, uint numCols) const;
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| 68 | #endif
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| 69 |
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| 70 | virtual int maxItemWidth() const;
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| 71 |
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| 72 | virtual void setGeometry(const QRect &rect);
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| 73 |
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| 74 | virtual bool hasHeightForWidth() const;
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| 75 | virtual int heightForWidth(int) const;
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| 76 |
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| 77 | virtual QSize sizeHint() const;
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| 78 |
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| 79 | virtual bool isEmpty() const;
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| 80 | uint itemCount() const;
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| 81 |
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| 82 | virtual uint columnsForWidth(int width) const;
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| 83 |
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| 84 | protected:
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| 85 |
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| 86 | void layoutGrid(uint numCols,
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| 87 | QwtArray<int>& rowHeight, QwtArray<int>& colWidth) const;
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| 88 | void stretchGrid(const QRect &rect, uint numCols,
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| 89 | QwtArray<int>& rowHeight, QwtArray<int>& colWidth) const;
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| 90 |
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| 91 |
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| 92 | private:
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| 93 | void init();
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| 94 | int maxRowWidth(int numCols) const;
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| 95 | void updateLayoutCache();
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| 96 |
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| 97 | #if QT_VERSION < 0x040000
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| 98 | // xlC 5.1, the IBM/AIX C++ compiler, needs it to be public
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| 99 | public:
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| 100 | #endif
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| 101 | class PrivateData;
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| 102 |
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| 103 | private:
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| 104 | PrivateData *d_data;
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| 105 | };
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| 106 |
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| 107 | #endif
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