examples/declarative/qtquick1/cppextensions/qgraphicslayouts/qgraphicslinearlayout/linearlayout.h

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  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