- Main Page
- Related Pages
- Modules
- Namespaces
- Classes
- Files
- Directories
- Examples

- File List
- File Members

# qgraphicslayoutitem.h

Go to the documentation of this file.

    00001 /****************************************************************************
    00002 **
    00003 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
    00004 ** All rights reserved.
    00005 ** Contact: Nokia Corporation (qt-info@nokia.com)
    00006 **
    00007 ** This file is part of the QtGui module of the Qt Toolkit.
    00008 **
    00009 ** $QT_BEGIN_LICENSE:LGPL$
    00010 ** Commercial Usage
    00011 ** Licensees holding valid Qt Commercial licenses may use this file in
    00012 ** accordance with the Qt Commercial License Agreement provided with the
    00013 ** Software or, alternatively, in accordance with the terms contained in
    00014 ** a written agreement between you and Nokia.
    00015 **
    00016 ** GNU Lesser General Public License Usage
    00017 ** Alternatively, this file may be used under the terms of the GNU Lesser
    00018 ** General Public License version 2.1 as published by the Free Software
    00019 ** Foundation and appearing in the file LICENSE.LGPL included in the
    00020 ** packaging of this file.  Please review the following information to
    00021 ** ensure the GNU Lesser General Public License version 2.1 requirements
    00022 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    00023 **
    00024 ** In addition, as a special exception, Nokia gives you certain additional
    00025 ** rights.  These rights are described in the Nokia Qt LGPL Exception
    00026 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this module.
    00027 **
    00028 ** GNU General Public License Usage
    00029 ** Alternatively, this file may be used under the terms of the GNU
    00030 ** General Public License version 3.0 as published by the Free Software
    00031 ** Foundation and appearing in the file LICENSE.GPL included in the
    00032 ** packaging of this file.  Please review the following information to
    00033 ** ensure the GNU General Public License version 3.0 requirements will be
    00034 ** met: http://www.gnu.org/copyleft/gpl.html.
    00035 **
    00036 ** If you have questions regarding the use of this file, please contact
    00037 ** Nokia at qt-info@nokia.com.
    00038 ** $QT_END_LICENSE$
    00039 **
    00040 ****************************************************************************/
    00041
    00042 #ifndef QGRAPHICSLAYOUTITEM_H
    00043 #define QGRAPHICSLAYOUTITEM_H
    00044
    00045 #include <QtCore/qscopedpointer.h>
    00046 #include <QtGui/qsizepolicy.h>
    00047 #include <QtGui/qevent.h>
    00048
    00049 QT_BEGIN_HEADER
    00050
    00051 QT_BEGIN_NAMESPACE
    00052
    00053 QT_MODULE(Gui)
    00054
    00055 #if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
    00056
    00057 class QGraphicsLayoutItemPrivate;
    00058 class QGraphicsItem;
    00059 class Q_GUI_EXPORT QGraphicsLayoutItem
    00060 {
    00061 public:
    00062     QGraphicsLayoutItem(QGraphicsLayoutItem *parent = 0, bool isLayout = false);
    00063     virtual ~QGraphicsLayoutItem();
    00064
    00065     void setSizePolicy(const QSizePolicy &policy);
    00066     void setSizePolicy(QSizePolicy::Policy hPolicy, QSizePolicy::Policy vPolicy, QSizePolicy::ControlType controlType = QSizePolicy::DefaultType);
    00067     QSizePolicy sizePolicy() const;
    00068
    00069     void setMinimumSize(const QSizeF &size);
    00070     inline void setMinimumSize(qreal w, qreal h);
    00071     QSizeF minimumSize() const;
    00072     void setMinimumWidth(qreal width);
    00073     inline qreal minimumWidth() const;
    00074     void setMinimumHeight(qreal height);
    00075     inline qreal minimumHeight() const;
    00076
    00077     void setPreferredSize(const QSizeF &size);
    00078     inline void setPreferredSize(qreal w, qreal h);
    00079     QSizeF preferredSize() const;
    00080     void setPreferredWidth(qreal width);
    00081     inline qreal preferredWidth() const;
    00082     void setPreferredHeight(qreal height);
    00083     inline qreal preferredHeight() const;
    00084
    00085     void setMaximumSize(const QSizeF &size);
    00086     inline void setMaximumSize(qreal w, qreal h);
    00087     QSizeF maximumSize() const;
    00088     void setMaximumWidth(qreal width);
    00089     inline qreal maximumWidth() const;
    00090     void setMaximumHeight(qreal height);
    00091     inline qreal maximumHeight() const;
    00092
    00093     virtual void setGeometry(const QRectF &rect);
    00094     QRectF geometry() const;
    00095     virtual void getContentsMargins(qreal *left, qreal *top, qreal *right, qreal *bottom) const;
    00096     QRectF contentsRect() const;
    00097
    00098     QSizeF effectiveSizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const;
    00099
    00100     virtual void updateGeometry();  //### rename to sizeHintChanged()
    00101
    00102     QGraphicsLayoutItem *parentLayoutItem() const;
    00103     void setParentLayoutItem(QGraphicsLayoutItem *parent);
    00104
    00105     bool isLayout() const;
    00106     // ###Qt5: Make automatic reparenting work regardless of item/object/widget type.
    00107     QGraphicsItem *graphicsItem() const;
    00108     bool ownedByLayout() const;
    00109
    00110 protected:
    00111     void setGraphicsItem(QGraphicsItem *item);
    00112     void setOwnedByLayout(bool ownedByLayout);
    00113     QGraphicsLayoutItem(QGraphicsLayoutItemPrivate &dd);
    00114
    00115     virtual QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const = 0;
    00116     QScopedPointer<QGraphicsLayoutItemPrivate> d_ptr;
    00117
    00118 private:
    00119     QSizeF *effectiveSizeHints(const QSizeF &constraint) const;
    00120     Q_DECLARE_PRIVATE(QGraphicsLayoutItem)
    00121
    00122     friend class QGraphicsLayout;
    00123 };
    00124
    00125 Q_DECLARE_INTERFACE(QGraphicsLayoutItem, "com.trolltech.Qt.QGraphicsLayoutItem")
    00126
    00127 inline void QGraphicsLayoutItem::setMinimumSize(qreal aw, qreal ah)
    00128 { setMinimumSize(QSizeF(aw, ah)); }
    00129 inline void QGraphicsLayoutItem::setPreferredSize(qreal aw, qreal ah)
    00130 { setPreferredSize(QSizeF(aw, ah)); }
    00131 inline void QGraphicsLayoutItem::setMaximumSize(qreal aw, qreal ah)
    00132 { setMaximumSize(QSizeF(aw, ah)); }
    00133
    00134 inline qreal QGraphicsLayoutItem::minimumWidth() const
    00135 { return effectiveSizeHint(Qt::MinimumSize).width(); }
    00136 inline qreal QGraphicsLayoutItem::minimumHeight() const
    00137 { return effectiveSizeHint(Qt::MinimumSize).height(); }
    00138
    00139 inline qreal QGraphicsLayoutItem::preferredWidth() const
    00140 { return effectiveSizeHint(Qt::PreferredSize).width(); }
    00141 inline qreal QGraphicsLayoutItem::preferredHeight() const
    00142 { return effectiveSizeHint(Qt::PreferredSize).height(); }
    00143
    00144 inline qreal QGraphicsLayoutItem::maximumWidth() const
    00145 { return effectiveSizeHint(Qt::MaximumSize).width(); }
    00146 inline qreal QGraphicsLayoutItem::maximumHeight() const
    00147 { return effectiveSizeHint(Qt::MaximumSize).height(); }
    00148
    00149 #endif
    00150
    00151 QT_END_NAMESPACE
    00152
    00153 QT_END_HEADER
    00154
    00155 #endif