| /**************************************************************************** |
| ** |
| ** Copyright (C) 2015 The Qt Company Ltd. |
| ** Contact: http://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtWidgets module of the Qt Toolkit. |
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| ****************************************************************************/ |
| |
| #ifndef QLAYOUTITEM_H |
| #define QLAYOUTITEM_H |
| |
| #include <QtWidgets/qsizepolicy.h> |
| #include <QtCore/qrect.h> |
| |
| #include <limits.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| |
| static const Q_DECL_UNUSED int QLAYOUTSIZE_MAX = INT_MAX/256/16; |
| |
| class QLayout; |
| class QLayoutItem; |
| class QSpacerItem; |
| class QWidget; |
| class QSize; |
| |
| class Q_WIDGETS_EXPORT QLayoutItem |
| { |
| public: |
| inline explicit QLayoutItem(Qt::Alignment alignment = 0); |
| virtual ~QLayoutItem(); |
| virtual QSize sizeHint() const = 0; |
| virtual QSize minimumSize() const = 0; |
| virtual QSize maximumSize() const = 0; |
| virtual Qt::Orientations expandingDirections() const = 0; |
| virtual void setGeometry(const QRect&) = 0; |
| virtual QRect geometry() const = 0; |
| virtual bool isEmpty() const = 0; |
| virtual bool hasHeightForWidth() const; |
| virtual int heightForWidth(int) const; |
| virtual int minimumHeightForWidth(int) const; |
| virtual void invalidate(); |
| |
| virtual QWidget *widget(); |
| virtual QLayout *layout(); |
| virtual QSpacerItem *spacerItem(); |
| |
| Qt::Alignment alignment() const { return align; } |
| void setAlignment(Qt::Alignment a); |
| virtual QSizePolicy::ControlTypes controlTypes() const; |
| |
| protected: |
| Qt::Alignment align; |
| }; |
| |
| inline QLayoutItem::QLayoutItem(Qt::Alignment aalignment) |
| : align(aalignment) { } |
| |
| class Q_WIDGETS_EXPORT QSpacerItem : public QLayoutItem |
| { |
| public: |
| QSpacerItem(int w, int h, |
| QSizePolicy::Policy hData = QSizePolicy::Minimum, |
| QSizePolicy::Policy vData = QSizePolicy::Minimum) |
| : width(w), height(h), sizeP(hData, vData) { } |
| ~QSpacerItem(); |
| |
| void changeSize(int w, int h, |
| QSizePolicy::Policy hData = QSizePolicy::Minimum, |
| QSizePolicy::Policy vData = QSizePolicy::Minimum); |
| QSize sizeHint() const; |
| QSize minimumSize() const; |
| QSize maximumSize() const; |
| Qt::Orientations expandingDirections() const; |
| bool isEmpty() const; |
| void setGeometry(const QRect&); |
| QRect geometry() const; |
| QSpacerItem *spacerItem(); |
| QSizePolicy sizePolicy() const { return sizeP; } |
| |
| private: |
| int width; |
| int height; |
| QSizePolicy sizeP; |
| QRect rect; |
| }; |
| |
| class Q_WIDGETS_EXPORT QWidgetItem : public QLayoutItem |
| { |
| Q_DISABLE_COPY(QWidgetItem) |
| |
| public: |
| explicit QWidgetItem(QWidget *w) : wid(w) { } |
| ~QWidgetItem(); |
| |
| QSize sizeHint() const; |
| QSize minimumSize() const; |
| QSize maximumSize() const; |
| Qt::Orientations expandingDirections() const; |
| bool isEmpty() const; |
| void setGeometry(const QRect&); |
| QRect geometry() const; |
| virtual QWidget *widget(); |
| |
| bool hasHeightForWidth() const; |
| int heightForWidth(int) const; |
| QSizePolicy::ControlTypes controlTypes() const; |
| protected: |
| QWidget *wid; |
| }; |
| |
| class Q_WIDGETS_EXPORT QWidgetItemV2 : public QWidgetItem |
| { |
| public: |
| explicit QWidgetItemV2(QWidget *widget); |
| ~QWidgetItemV2(); |
| |
| QSize sizeHint() const; |
| QSize minimumSize() const; |
| QSize maximumSize() const; |
| int heightForWidth(int width) const; |
| |
| private: |
| enum { Dirty = -123, HfwCacheMaxSize = 3 }; |
| |
| inline bool useSizeCache() const; |
| void updateCacheIfNecessary() const; |
| inline void invalidateSizeCache() { |
| q_cachedMinimumSize.setWidth(Dirty); |
| q_hfwCacheSize = 0; |
| } |
| |
| mutable QSize q_cachedMinimumSize; |
| mutable QSize q_cachedSizeHint; |
| mutable QSize q_cachedMaximumSize; |
| mutable QSize q_cachedHfws[HfwCacheMaxSize]; |
| mutable short q_firstCachedHfw; |
| mutable short q_hfwCacheSize; |
| void *d; |
| |
| friend class QWidgetPrivate; |
| |
| Q_DISABLE_COPY(QWidgetItemV2) |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QLAYOUTITEM_H |