1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtDeclarative module of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:BSD$

    10 ** You may use this file under the terms of the BSD license as follows:

    11 **

    12 ** "Redistribution and use in source and binary forms, with or without

    13 ** modification, are permitted provided that the following conditions are

    14 ** met:

    15 **   * Redistributions of source code must retain the above copyright

    16 **     notice, this list of conditions and the following disclaimer.

    17 **   * Redistributions in binary form must reproduce the above copyright

    18 **     notice, this list of conditions and the following disclaimer in

    19 **     the documentation and/or other materials provided with the

    20 **     distribution.

    21 **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor

    22 **     the names of its contributors may be used to endorse or promote

    23 **     products derived from this software without specific prior written

    24 **     permission.

    25 **

    26 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

    27 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

    28 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

    29 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

    30 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

    31 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

    32 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

    33 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

    34 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    35 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    36 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."

    37 ** $QT_END_LICENSE$

    38 **

    39 ****************************************************************************/

    40 

    41 #ifndef LINEARLAYOUT_H

    42 #define LINEARLAYOUT_H

    43 

    44 #include <qdeclarative.h>

    45 

    46 #include <QGraphicsLinearLayout>

    47 #include <QGraphicsLayoutItem>

    48 

    49 class GraphicsLinearLayoutStretchItemObject : public QObject, public QGraphicsLayoutItem

    50 {

    51     Q_OBJECT

    52     Q_INTERFACES(QGraphicsLayoutItem)

    53 public:

    54     GraphicsLinearLayoutStretchItemObject(QObject *parent = 0);

    55 

    56     virtual QSizeF sizeHint(Qt::SizeHint, const QSizeF &) const;

    57 };

    58 

    59 

    60 class LinearLayoutAttached;

    61 class GraphicsLinearLayoutObject : public QObject, public QGraphicsLinearLayout

    62 {

    63     Q_OBJECT

    64     Q_INTERFACES(QGraphicsLayout QGraphicsLayoutItem)

    65 

    66     Q_PROPERTY(QDeclarativeListProperty<QGraphicsLayoutItem> children READ children)

    67     Q_PROPERTY(Qt::Orientation orientation READ orientation WRITE setOrientation)

    68     Q_PROPERTY(qreal spacing READ spacing WRITE setSpacing)

    69     Q_PROPERTY(qreal contentsMargin READ contentsMargin WRITE setContentsMargin)

    70     Q_CLASSINFO("DefaultProperty", "children")

    71 public:

    72     GraphicsLinearLayoutObject(QObject * = 0);

    73     ~GraphicsLinearLayoutObject();

    74 

    75     QDeclarativeListProperty<QGraphicsLayoutItem> children() { return QDeclarativeListProperty<QGraphicsLayoutItem>(this, 0, children_append, children_count, children_at, children_clear); }

    76 

    77     qreal contentsMargin() const;

    78     void setContentsMargin(qreal);

    79 

    80     void removeAt(int index);

    81 

    82     static LinearLayoutAttached *qmlAttachedProperties(QObject *);

    83 

    84 private slots:

    85     void updateStretch(QGraphicsLayoutItem*,int);

    86     void updateSpacing(QGraphicsLayoutItem*,int);

    87     void updateAlignment(QGraphicsLayoutItem*,Qt::Alignment);

    88 

    89 private:

    90     friend class LinearLayoutAttached;

    91 

    92     void clearChildren();

    93     void insertLayoutItem(int, QGraphicsLayoutItem *);

    94 

    95     static void children_append(QDeclarativeListProperty<QGraphicsLayoutItem> *prop, QGraphicsLayoutItem *item) {

    96         static_cast<GraphicsLinearLayoutObject*>(prop->object)->insertLayoutItem(-1, item);

    97     }

    98 

    99     static void children_clear(QDeclarativeListProperty<QGraphicsLayoutItem> *prop) {

   100         static_cast<GraphicsLinearLayoutObject*>(prop->object)->clearChildren();

   101     }

   102 

   103     static int children_count(QDeclarativeListProperty<QGraphicsLayoutItem> *prop) {

   104         return static_cast<GraphicsLinearLayoutObject*>(prop->object)->count();

   105     }

   106 

   107     static QGraphicsLayoutItem *children_at(QDeclarativeListProperty<QGraphicsLayoutItem> *prop, int index) {

   108         return static_cast<GraphicsLinearLayoutObject*>(prop->object)->itemAt(index);

   109     }

   110 

   111     static QHash<QGraphicsLayoutItem*, LinearLayoutAttached*> attachedProperties;

   112 };

   113 

   114 

   115 class LinearLayoutAttached : public QObject

   116 {

   117     Q_OBJECT

   118 

   119     Q_PROPERTY(int stretchFactor READ stretchFactor WRITE setStretchFactor NOTIFY stretchChanged)

   120     Q_PROPERTY(Qt::Alignment alignment READ alignment WRITE setAlignment NOTIFY alignmentChanged)

   121     Q_PROPERTY(int spacing READ spacing WRITE setSpacing NOTIFY spacingChanged)

   122 

   123 public:

   124     LinearLayoutAttached(QObject *parent);

   125 

   126     int stretchFactor() const { return m_stretch; }

   127     void setStretchFactor(int f);

   128     Qt::Alignment alignment() const { return m_alignment; }

   129     void setAlignment(Qt::Alignment a);

   130     int spacing() const { return m_spacing; }

   131     void setSpacing(int s);

   132 

   133 signals:

   134     void stretchChanged(QGraphicsLayoutItem*, int);

   135     void alignmentChanged(QGraphicsLayoutItem*, Qt::Alignment);

   136     void spacingChanged(QGraphicsLayoutItem*, int);

   137 

   138 private:

   139     int m_stretch;

   140     Qt::Alignment m_alignment;

   141     int m_spacing;

   142 };

   143 

   144 QML_DECLARE_INTERFACE(QGraphicsLayoutItem)

   145 QML_DECLARE_INTERFACE(QGraphicsLayout)

   146 QML_DECLARE_TYPE(GraphicsLinearLayoutStretchItemObject)

   147 QML_DECLARE_TYPE(GraphicsLinearLayoutObject)

   148 QML_DECLARE_TYPEINFO(GraphicsLinearLayoutObject, QML_HAS_ATTACHED_PROPERTIES)

   149 

   150 #endif

   151 

   152