gridlayout.h Example File

declarative/cppextensions/qgraphicslayouts/qgraphicsgridlayout/gridlayout.h
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 #ifndef GRIDLAYOUT_H
 #define GRIDLAYOUT_H

 #include <qdeclarative.h>

 #include <QGraphicsGridLayout>
 #include <QGraphicsLayoutItem>

 class GridLayoutAttached;
 class GraphicsGridLayoutObject : public QObject, public QGraphicsGridLayout
 {
     Q_OBJECT
     Q_INTERFACES(QGraphicsLayout QGraphicsLayoutItem)

     Q_PROPERTY(QDeclarativeListProperty<QGraphicsLayoutItem> children READ children)
     Q_PROPERTY(qreal spacing READ spacing WRITE setSpacing)
     Q_PROPERTY(qreal contentsMargin READ contentsMargin WRITE setContentsMargin)
     Q_PROPERTY(qreal verticalSpacing READ verticalSpacing WRITE setVerticalSpacing)
     Q_PROPERTY(qreal horizontalSpacing READ horizontalSpacing WRITE setHorizontalSpacing)
     Q_CLASSINFO("DefaultProperty", "children")

 public:
     GraphicsGridLayoutObject(QObject * = 0);
     ~GraphicsGridLayoutObject();

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

     qreal spacing() const;
     qreal contentsMargin() const;
     void setContentsMargin(qreal);

     void removeAt(int index);

     static GridLayoutAttached *qmlAttachedProperties(QObject *);

 private slots:
     void updateAlignment(QGraphicsLayoutItem*,Qt::Alignment);

 private:
     friend class GraphicsLayoutAttached;

     void addWidget(QGraphicsWidget *);
     void clearChildren();
     void addLayoutItem(QGraphicsLayoutItem *);

     static void children_append(QDeclarativeListProperty<QGraphicsLayoutItem> *prop, QGraphicsLayoutItem *item) {
         static_cast<GraphicsGridLayoutObject*>(prop->object)->addLayoutItem(item);
     }

     static void children_clear(QDeclarativeListProperty<QGraphicsLayoutItem> *prop) {
         static_cast<GraphicsGridLayoutObject*>(prop->object)->clearChildren();
     }

     static int children_count(QDeclarativeListProperty<QGraphicsLayoutItem> *prop) {
         return static_cast<GraphicsGridLayoutObject*>(prop->object)->count();
     }

     static QGraphicsLayoutItem *children_at(QDeclarativeListProperty<QGraphicsLayoutItem> *prop, int index) {
         return static_cast<GraphicsGridLayoutObject*>(prop->object)->itemAt(index);
     }

     static QHash<QGraphicsLayoutItem*, GridLayoutAttached*> attachedProperties;
 };

 class GridLayoutAttached : public QObject
 {
     Q_OBJECT

     Q_PROPERTY(int row READ row WRITE setRow)
     Q_PROPERTY(int column READ column WRITE setColumn)

     Q_PROPERTY(int rowSpan READ rowSpan WRITE setRowSpan)
     Q_PROPERTY(int columnSpan READ columnSpan WRITE setColumnSpan)
     Q_PROPERTY(Qt::Alignment alignment READ alignment WRITE setAlignment)

     Q_PROPERTY(int rowStretchFactor READ rowStretchFactor WRITE setRowStretchFactor)
     Q_PROPERTY(int columnStretchFactor READ columnStretchFactor WRITE setColumnStretchFactor)
     Q_PROPERTY(int rowSpacing READ rowSpacing WRITE setRowSpacing)
     Q_PROPERTY(int columnSpacing READ columnSpacing WRITE setColumnSpacing)

     Q_PROPERTY(int rowPreferredHeight READ rowPreferredHeight WRITE setRowPreferredHeight)
     Q_PROPERTY(int rowMinimumHeight READ rowMinimumHeight WRITE setRowMinimumHeight)
     Q_PROPERTY(int rowMaximumHeight READ rowMaximumHeight WRITE setRowMaximumHeight)
     Q_PROPERTY(int rowFixedHeight READ rowFixedHeight WRITE setRowFixedHeight)

     Q_PROPERTY(int columnPreferredWidth READ columnPreferredWidth WRITE setColumnPreferredWidth)
     Q_PROPERTY(int columnMaximumWidth READ columnMaximumWidth WRITE setColumnMaximumWidth)
     Q_PROPERTY(int columnMinimumWidth READ columnMinimumWidth WRITE setColumnMinimumWidth)
     Q_PROPERTY(int columnFixedWidth READ columnFixedWidth WRITE setColumnFixedWidth)

 public:
     GridLayoutAttached(QObject *parent);

     int row() const { return m_row; }
     void setRow(int r) { m_row = r; }

     int column() const { return m_column; }
     void setColumn(int c) { m_column = c; }

     int rowSpan() const { return m_rowspan; }
     void setRowSpan(int rs) { m_rowspan = rs; }

     int columnSpan() const { return m_colspan; }
     void setColumnSpan(int cs) { m_colspan = cs; }

     Qt::Alignment alignment() const { return m_alignment; }
     void setAlignment(Qt::Alignment a);

     int rowStretchFactor() const { return m_rowStretch; }
     void setRowStretchFactor(int f) { m_rowStretch = f; }
     int columnStretchFactor() const { return m_colStretch; }
     void setColumnStretchFactor(int f) { m_colStretch = f; }

     int rowSpacing() const { return m_rowSpacing; }
     void setRowSpacing(int s) { m_rowSpacing = s; }
     int columnSpacing() const { return m_colSpacing; }
     void setColumnSpacing(int s) { m_colSpacing = s; }

     int rowPreferredHeight() const { return m_rowPrefHeight; }
     void setRowPreferredHeight(int s) { m_rowPrefHeight = s; }

     int rowMaximumHeight() const { return m_rowMaxHeight; }
     void setRowMaximumHeight(int s) { m_rowMaxHeight = s; }

     int rowMinimumHeight() const { return m_rowMinHeight; }
     void setRowMinimumHeight(int s) { m_rowMinHeight = s; }

     int rowFixedHeight() const { return m_rowFixHeight; }
     void setRowFixedHeight(int s) { m_rowFixHeight = s; }

     int columnPreferredWidth() const { return m_colPrefwidth; }
     void setColumnPreferredWidth(int s) { m_colPrefwidth = s; }

     int columnMaximumWidth() const { return m_colMaxwidth; }
     void setColumnMaximumWidth(int s) { m_colMaxwidth = s; }

     int columnMinimumWidth() const { return m_colMinwidth; }
     void setColumnMinimumWidth(int s) { m_colMinwidth = s; }

     int columnFixedWidth() const { return m_colFixwidth; }
     void setColumnFixedWidth(int s) { m_colFixwidth = s; }

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

 private:
     int m_row;
     int m_column;

     int m_rowspan;
     int m_colspan;
     Qt::Alignment m_alignment;

     int m_rowStretch;
     int m_colStretch;
     int m_rowSpacing;
     int m_colSpacing;

     int m_rowPrefHeight;
     int m_rowMaxHeight;
     int m_rowMinHeight;
     int m_rowFixHeight;

     int m_colPrefwidth;
     int m_colMaxwidth;
     int m_colMinwidth;
     int m_colFixwidth;
 };

 QML_DECLARE_INTERFACE(QGraphicsLayoutItem)
 QML_DECLARE_INTERFACE(QGraphicsLayout)
 QML_DECLARE_TYPE(GraphicsGridLayoutObject)
 QML_DECLARE_TYPEINFO(GraphicsGridLayoutObject, QML_HAS_ATTACHED_PROPERTIES)

 #endif