author | sheepluva |
Mon, 24 Oct 2011 06:54:46 +0200 | |
changeset 6196 | c16e84558f71 |
parent 4477 | 63a21fac8bf7 |
permissions | -rw-r--r-- |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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/* |
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* Copyright (c) 2009 Nokia Corporation. |
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*/ |
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#ifndef QASPECTRATIOLAYOUT_H_ |
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#define QASPECTRATIOLAYOUT_H_ |
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#include <QLayout> |
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#include <QPointer> |
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#include <QRect> |
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#include <QWidgetItem> |
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#include <QLayoutItem> |
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class QAspectRatioLayout : public QLayout |
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{ |
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Q_OBJECT |
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public: |
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QAspectRatioLayout(QWidget* parent, int spacing =-1); |
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QAspectRatioLayout(int spacing = -1); |
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~QAspectRatioLayout(); |
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/* Convenience method */ |
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virtual void add(QLayoutItem* item); |
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/* http://doc.trolltech.com/qlayout.html#addItem */ |
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virtual void addItem(QLayoutItem* item); |
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/* http://doc.trolltech.com/qlayout.html#addWidget */ |
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virtual void addWidget(QWidget* widget); |
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/* http://doc.trolltech.com/qlayout.html#takeAt */ |
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virtual QLayoutItem* takeAt(int index); |
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/* http://doc.trolltech.com/qlayout.html#itemAt */ |
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virtual QLayoutItem* itemAt(int index) const; |
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/* http://doc.trolltech.com/qlayout.html#count */ |
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virtual int count() const; |
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/* |
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* These are ours since we do have only one item. |
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*/ |
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virtual QLayoutItem* replaceItem(QLayoutItem* item); |
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virtual QLayoutItem* take(); |
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virtual bool hasItem() const; |
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/* http://doc.trolltech.com/qlayout.html#expandingDirections */ |
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virtual Qt::Orientations expandingDirections() const; |
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/* |
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* This method contains most of the juice of this article. |
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* http://doc.trolltech.com/qlayoutitem.html#setGeometry |
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*/ |
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virtual void setGeometry(const QRect& rect); |
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/* http://doc.trolltech.com/qlayoutitem.html#geometry */ |
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virtual QRect geometry(); |
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/* http://doc.trolltech.com/qlayoutitem.html#sizeHint */ |
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virtual QSize sizeHint() const; |
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/* http://doc.trolltech.com/qlayout.html#minimumSize */ |
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virtual QSize minimumSize() const; |
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/* http://doc.trolltech.com/qlayoutitem.html#hasHeightForWidth */ |
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virtual bool hasHeightForWidth() const; |
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private: |
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/* Saves the last received rect. */ |
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void setLastReceivedRect(const QRect& rect); |
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/* Used to initialize the object. */ |
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void init(int spacing); |
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/* Calculates the maximum size for the item from the assigned size. */ |
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QSize calculateProperSize(QSize from) const; |
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/* Calculates the center location from the assigned size and |
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* the items size. */ |
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QPoint calculateCenterLocation(QSize from, QSize itemSize) const; |
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/* Check if two QRects are equal */ |
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bool areRectsEqual(const QRect& a, const QRect& b) const; |
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/* Contains item reference */ |
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QLayoutItem* item; |
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/* |
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* Used for caching so we won't do calculations every time |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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79 |
* setGeometry is called. |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
unc0rr
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80 |
*/ |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
unc0rr
parents:
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changeset
|
81 |
QRect* lastReceivedRect; |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
unc0rr
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changeset
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82 |
/* Contains geometry */ |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
unc0rr
parents:
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changeset
|
83 |
QRect* _geometry; |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
unc0rr
parents:
diff
changeset
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84 |
|
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
unc0rr
parents:
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changeset
|
85 |
}; |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
unc0rr
parents:
diff
changeset
|
86 |
|
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
unc0rr
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87 |
#endif /* QASPECTRATIOLAYOUT_H_ */ |