uhm... a feature
--- a/QTfrontend/drawmapscene.cpp Fri Oct 18 16:05:31 2013 +0400
+++ b/QTfrontend/drawmapscene.cpp Sat Oct 19 00:42:24 2013 +0400
@@ -20,6 +20,7 @@
#include <QGraphicsPathItem>
#include <QtEndian>
#include <QDebug>
+#include <QTransform>
#include <math.h>
#include "drawmapscene.h"
@@ -63,6 +64,10 @@
if(m_currPath && (mouseEvent->buttons() & Qt::LeftButton))
{
QPainterPath path = m_currPath->path();
+ QPointF currentPos = mouseEvent->scenePos();
+
+ if(mouseEvent->modifiers() & Qt::ControlModifier)
+ currentPos = putSomeConstraints(paths.first().initialPoint, currentPos);
switch (m_pathType)
{
@@ -70,20 +75,19 @@
if(mouseEvent->modifiers() & Qt::ControlModifier)
{
int c = path.elementCount();
- QPointF pos = mouseEvent->scenePos();
- path.setElementPositionAt(c - 1, pos.x(), pos.y());
+ path.setElementPositionAt(c - 1, currentPos.x(), currentPos.y());
}
else
{
- path.lineTo(mouseEvent->scenePos());
+ path.lineTo(currentPos);
paths.first().points.append(mouseEvent->scenePos().toPoint());
}
break;
case Rectangle: {
path = QPainterPath();
QPointF p1 = paths.first().initialPoint;
- QPointF p2 = mouseEvent->scenePos();
+ QPointF p2 = currentPos;
path.moveTo(p1);
path.lineTo(p1.x(), p2.y());
path.lineTo(p2);
@@ -93,7 +97,7 @@
}
case Ellipse: {
path = QPainterPath();
- QList<QPointF> points = makeEllipse(paths.first().initialPoint, mouseEvent->scenePos());
+ QList<QPointF> points = makeEllipse(paths.first().initialPoint, currentPos);
path.addPolygon(QPolygonF(QVector<QPointF>::fromList(points)));
break;
}
@@ -134,19 +138,24 @@
{
if (m_currPath)
{
+ QPointF currentPos = mouseEvent->scenePos();
+
+ if(mouseEvent->modifiers() & Qt::ControlModifier)
+ currentPos = putSomeConstraints(paths.first().initialPoint, currentPos);
+
switch (m_pathType)
{
case Polyline: {
QPainterPath path = m_currPath->path();
path.lineTo(mouseEvent->scenePos());
- paths.first().points.append(mouseEvent->scenePos().toPoint());
+ paths.first().points.append(currentPos.toPoint());
m_currPath->setPath(path);
simplifyLast();
break;
}
case Rectangle: {
QPoint p1 = paths.first().initialPoint;
- QPoint p2 = mouseEvent->scenePos().toPoint();
+ QPoint p2 = currentPos.toPoint();
QList<QPoint> rpoints;
rpoints << p1 << QPoint(p1.x(), p2.y()) << p2 << QPoint(p2.x(), p1.y()) << p1;
paths.first().points = rpoints;
@@ -154,7 +163,7 @@
}
case Ellipse:
QPoint p1 = paths.first().initialPoint;
- QPoint p2 = mouseEvent->scenePos().toPoint();
+ QPoint p2 = currentPos.toPoint();
QList<QPointF> points = makeEllipse(p1, p2);
QList<QPoint> epoints;
foreach(const QPointF & p, points)
@@ -458,3 +467,21 @@
return l;
}
+
+QPointF DrawMapScene::putSomeConstraints(const QPointF &initialPoint, const QPointF &point)
+{
+ QPointF vector = point - initialPoint;
+
+ for(int angle = 0; angle < 180; angle += 15)
+ {
+ QTransform transform;
+ transform.rotate(angle);
+
+ QPointF rotated = transform.map(vector);
+
+ if(rotated.x() == 0) return point;
+ if(qAbs(rotated.y() / rotated.x()) < 0.05) return initialPoint + transform.inverted().map(QPointF(rotated.x(), 0));
+ }
+
+ return point;
+}
--- a/QTfrontend/drawmapscene.h Fri Oct 18 16:05:31 2013 +0400
+++ b/QTfrontend/drawmapscene.h Sat Oct 19 00:42:24 2013 +0400
@@ -87,6 +87,7 @@
quint8 serializePenWidth(int width);
int deserializePenWidth(quint8 width);
QList<QPointF> makeEllipse(const QPointF & center, const QPointF & corner);
+ QPointF putSomeConstraints(const QPointF & initialPoint, const QPointF & point);
};
#endif // DRAWMAPSCENE_H