diff -r aee36896d46b -r e7882bd1a894 QTfrontend/qaspectratiolayout.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/QTfrontend/qaspectratiolayout.h Mon Dec 13 22:12:30 2010 +0300 @@ -0,0 +1,87 @@ +/* + * Copyright (c) 2009 Nokia Corporation. + */ + +#ifndef QASPECTRATIOLAYOUT_H_ +#define QASPECTRATIOLAYOUT_H_ + +#include +#include +#include +#include +#include + + +class QAspectRatioLayout : public QLayout +{ + Q_OBJECT + +public: + QAspectRatioLayout(QWidget* parent, int spacing =-1); + QAspectRatioLayout(int spacing = -1); + ~QAspectRatioLayout(); + + /* Convenience method */ + virtual void add(QLayoutItem* item); + +/* http://doc.trolltech.com/qlayout.html#addItem */ + virtual void addItem(QLayoutItem* item); + /* http://doc.trolltech.com/qlayout.html#addWidget */ + virtual void addWidget(QWidget* widget); + /* http://doc.trolltech.com/qlayout.html#takeAt */ + virtual QLayoutItem* takeAt(int index); + /* http://doc.trolltech.com/qlayout.html#itemAt */ + virtual QLayoutItem* itemAt(int index) const; + /* http://doc.trolltech.com/qlayout.html#count */ + virtual int count() const; + + /* + * These are ours since we do have only one item. + */ + virtual QLayoutItem* replaceItem(QLayoutItem* item); + virtual QLayoutItem* take(); + virtual bool hasItem() const; + +/* http://doc.trolltech.com/qlayout.html#expandingDirections */ + virtual Qt::Orientations expandingDirections() const; + + /* + * This method contains most of the juice of this article. + * http://doc.trolltech.com/qlayoutitem.html#setGeometry + */ + virtual void setGeometry(const QRect& rect); + /* http://doc.trolltech.com/qlayoutitem.html#geometry */ + virtual QRect geometry(); + + /* http://doc.trolltech.com/qlayoutitem.html#sizeHint */ + virtual QSize sizeHint() const; + /* http://doc.trolltech.com/qlayout.html#minimumSize */ + virtual QSize minimumSize() const; + /* http://doc.trolltech.com/qlayoutitem.html#hasHeightForWidth */ + virtual bool hasHeightForWidth() const; + +private: + /* Saves the last received rect. */ + void setLastReceivedRect(const QRect& rect); + /* Used to initialize the object. */ + void init(int spacing); + /* Calculates the maximum size for the item from the assigned size. */ + QSize calculateProperSize(QSize from) const; + /* Calculates the center location from the assigned size and + * the items size. */ + QPoint calculateCenterLocation(QSize from, QSize itemSize) const; + /* Check if two QRects are equal */ + bool areRectsEqual(const QRect& a, const QRect& b) const; + /* Contains item reference */ + QLayoutItem* item; + /* + * Used for caching so we won't do calculations every time + * setGeometry is called. + */ + QRect* lastReceivedRect; + /* Contains geometry */ + QRect* _geometry; + +}; + +#endif /* QASPECTRATIOLAYOUT_H_ */