Add an example of how to write a custom layout for QGraphicsLayouts.

Flowlayout...  Documentation will follow.

1 files changed, 36 insertions, 0 deletions

diff --git a/examples/graphicsview/flowlayout/flowlayout.h b/examples/graphicsview/flowlayout/flowlayout.h
new file mode 100644
index 0000000..ab3d33b
--- /dev/null
+++ b/examples/graphicsview/flowlayout/flowlayout.h
@@ -0,0 +1,36 @@
+#include <QtGui/qgraphicslayout.h>
+
+class FlowLayout : public QGraphicsLayout
+{
+public:
+    FlowLayout();
+    inline void addItem(QGraphicsLayoutItem *item);
+    void insertItem(int index, QGraphicsLayoutItem *item);
+    void setSpacing(Qt::Orientations o, qreal spacing);
+    qreal spacing(Qt::Orientation o) const;
+
+    // inherited functions
+    void setGeometry(const QRectF &geom);
+
+    int count() const;
+    QGraphicsLayoutItem *itemAt(int index) const;
+    void removeAt(int index);
+
+protected:
+    QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const;
+
+private:
+    qreal doLayout(const QRectF &geom, bool applyNewGeometry);
+    QSizeF minSize(const QSizeF &constraint) const;
+    QSizeF prefSize() const;
+    QSizeF maxSize() const;
+
+    QList<QGraphicsLayoutItem*> m_items;
+    qreal m_spacing[2];
+};
+
+
+inline void FlowLayout::addItem(QGraphicsLayoutItem *item)
+{
+    insertItem(-1, item);
+}