comparison connectionitem.cpp @ 46:bd3accba9b3f

* Better layout for branches; spline connection paths

+
+
+#include "connectionitem.h"
+
+#include "changesetitem.h"
+
+#include <QPainter>
+
+QRectF
+ConnectionItem::boundingRect() const
+{
+    if (!m_parent || !m_child) return QRectF();
+    float scale = 100;
+    float size = 50;
+    return QRectF(scale * m_child->column() + size/2 - 2,
+		  scale * m_child->row() + size - 2,
+		  scale * m_parent->column() - scale * m_child->column() + 4,
+		  scale * m_parent->row() - scale * m_child->row() - size + 4)
+	.normalized();
+}
+
+void
+ConnectionItem::paint(QPainter *paint, const QStyleOptionGraphicsItem *, QWidget *)
+{
+    QPainterPath p;
+    float scale = 100;
+    float size = 50;
+    p.moveTo(scale * m_child->column() + size/2,
+	     scale * m_child->row() + size);
+    if (m_parent->column() == m_child->column()) {
+	p.lineTo(scale * m_parent->column() + size/2,
+		 scale * m_parent->row());
+    } else {
+	p.cubicTo(scale * m_child->column() + size/2,
+		  scale * m_child->row() + size + size,
+		  scale * m_parent->column() + size/2,
+		  scale * m_child->row() + size,
+		  scale * m_parent->column() + size/2,
+		  scale * m_child->row() + scale);
+	if (abs(m_parent->row() - m_child->row()) > 1) {
+	    p.lineTo(scale * m_parent->column() + size/2,
+		     scale * m_parent->row());
+	}
+    }
+    paint->drawPath(p);
+}
+
+