Add 2d drawing for lines.

1 files changed, 52 insertions, 0 deletions

diff --git a/line.cpp b/line.cpp
new file mode 100644
index 0000000..aa29d43
--- /dev/null
+++ b/line.cpp
@@ -0,0 +1,52 @@
+#include "line.h"
+
+Line::Line()
+    :QLine()
+{
+    m_selected = true;
+}
+
+Line::Line(const Line &other)
+    :QLine(other)
+{
+    m_selected = other.m_selected;
+}
+
+bool Line::isHit(const QPoint &clickPoint)
+{
+    QVector3D a(p2() - p1());
+    QVector3D r1(p1());
+
+    QVector3D rq(clickPoint);
+
+    float dist = rq.distanceToLine(r1, a.normalized());
+
+    return  dist < 5;
+}
+
+void Line::setSelected(bool selected)
+{
+    m_selected = selected;
+}
+
+void Line::draw(QPainter *painter)
+{
+    if(m_selected)
+    {
+        QPen penTemp(Qt::DotLine);
+        penTemp.setColor(Qt::red);
+        painter->setPen(penTemp);
+
+        painter->drawEllipse(p1(), 5, 5);
+        painter->drawEllipse(p2(), 5, 5);
+    }
+    else
+    {
+        QPen penNormal(Qt::SolidLine);
+        penNormal.setColor(Qt::black);
+        painter->setPen(penNormal);
+    }
+
+    painter->drawLine(p1(), p2());
+
+}