QetShapeItem: user can add polyline shape

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@3144 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/diagramview.cpp

@@ -54,6 +54,7 @@ DiagramView::DiagramView(Diagram *diagram, QWidget *parent) : QGraphicsView(pare
 	setAttribute(Qt::WA_DeleteOnClose, true);
 	setInteractive(true);
 	current_behavior = noAction;
+	m_polyline_added = false;
 
 	QString whatsthis = tr(
 		"Ceci est la zone dans laquelle vous concevez vos sch\351mas en y ajoutant"
@@ -448,7 +449,7 @@ void DiagramView::mousePressEvent(QMouseEvent *e) {
 		fresh_focus_in_ = false;
 	}
 
-	if (isInteractive() && !scene -> isReadOnly() && e -> buttons() == Qt::LeftButton) {
+	if (isInteractive() && !scene -> isReadOnly() && e -> button() == Qt::LeftButton) {
 		switch (current_behavior) {
 			case noAction:
 				QGraphicsView::mousePressEvent(e);
@@ -473,6 +474,19 @@ void DiagramView::mousePressEvent(QMouseEvent *e) {
 				newShapeItem = new QetShapeItem(rubber_band_origin, rubber_band_origin, QetShapeItem::Ellipse);
 				scene -> addItem(newShapeItem);
 				break;
+			case addingPolyline:
+				if (!m_polyline_added) {
+					setContextMenuPolicy(Qt::NoContextMenu); //< for finish the polyline we must to right click,
+															 //  We disable the context menu
+					newShapeItem = new QetShapeItem(rubber_band_origin, rubber_band_origin, QetShapeItem::Polyline);
+					scene -> addItem(newShapeItem);
+					m_polyline_added = true;
+				} else {
+					newShapeItem->setNextPoint(Diagram::snapToGrid(rubber_band_origin)); //< this point is ok for pos
+					newShapeItem->setNextPoint(Diagram::snapToGrid(rubber_band_origin)); //< Add new point for next segment. the pos of this point
+																						 //  can be changed by calling QetShapItem::setP2()
+				}
+				break;
 			case dragView:
 				current_behavior = noAction;
 				QGraphicsView::mousePressEvent(e);
@@ -482,13 +496,13 @@ void DiagramView::mousePressEvent(QMouseEvent *e) {
 				break;
 		}
 	}
-	// workaround for drag view with hold wheel click and drag mouse
-	// see also mouseMoveEvent() and mouseReleaseEvent()
-	else if (e -> buttons() == Qt::MidButton) {
+
+	//Start drag view when hold the middle button
+	else if (e -> button() == Qt::MidButton) {
 		setCursor(Qt::ClosedHandCursor);
-		center_view_ = mapToScene(this -> viewport() -> rect()).boundingRect().center();
-		return;
+		center_view_ = mapToScene(this -> viewport() -> rect().center());
 	}
+
 	else QGraphicsView::mousePressEvent(e);
 }
 
@@ -497,15 +511,19 @@ void DiagramView::mousePressEvent(QMouseEvent *e) {
  * Manage the event move mouse
  */
 void DiagramView::mouseMoveEvent(QMouseEvent *e) {
-	if ((e -> buttons() & Qt::MidButton) == Qt::MidButton) {
+	//Drag the view
+	if (e -> buttons() == Qt::MidButton) {
 		QPointF move = rubber_band_origin - mapToScene(e -> pos());
 		this -> centerOn(center_view_ + move);
-		center_view_ = mapToScene(this -> viewport() -> rect()).boundingRect().center();
-		return;
+		center_view_ = mapToScene( this -> viewport() -> rect().center() );
 	}
-	else if (e -> buttons() == Qt::LeftButton && current_behavior & addingShape) {
+
+	//Add point P2 to the curent shape
+	else if ( (e -> buttons() == Qt::LeftButton && current_behavior &addingShape) ||
+			  (current_behavior == addingPolyline && m_polyline_added) ) {
 		newShapeItem->setP2(mapToScene(e->pos()));
 	}
+
 	else QGraphicsView::mouseMoveEvent(e);
 }
 
@@ -514,16 +532,28 @@ void DiagramView::mouseMoveEvent(QMouseEvent *e) {
  * Manage event release click mouse
  */
 void DiagramView::mouseReleaseEvent(QMouseEvent *e) {
-	if (e -> button() == Qt::MidButton) {
-		setCursor(Qt::ArrowCursor);
-		return;
-	}
-	else if (current_behavior & addingShape) {
+	//Stop drag view
+	if (e -> button() == Qt::MidButton) setCursor(Qt::ArrowCursor);
+
+	// Add shape define by 2 points
+	else if (current_behavior & adding2PShape) {
 		// place it to the good position with an undo command
 		scene -> undoStack().push(new AddShapeCommand(scene, newShapeItem, rubber_band_origin));
 		emit(itemAdded());
 		current_behavior = noAction;
 	}
+
+	// Add polyline shape
+	else if (e -> button() == Qt::RightButton && current_behavior == addingPolyline) {
+		newShapeItem->setP2(rubber_band_origin);
+		scene -> undoStack().push(new AddShapeCommand(scene, newShapeItem, newShapeItem->scenePos()));
+		emit(itemAdded());
+		current_behavior = noAction;
+		m_polyline_added = false;
+		setContextMenuPolicy(Qt::DefaultContextMenu); //< the polyline is finish,
+													  //  We make context menu available
+	}
+
 	else QGraphicsView::mouseReleaseEvent(e);
 }
 
@@ -1245,6 +1275,13 @@ void DiagramView::addEllipse() {
 	current_behavior = addingEllipse;
 }
 
+/**
+ * @brief DiagramView::addPolyline
+ */
+void DiagramView::addPolyline() {
+	current_behavior = addingPolyline;
+}
+
 /**
  * @brief DiagramView::editImage
  * open edit image dialog if only one image is selected

sources/diagramview.h

@@ -46,8 +46,10 @@ class DiagramView : public QGraphicsView {
 				   addingLine	   =8,
 				   addingRectangle =16,
 				   addingEllipse   =32,
-				   addingShape	   =56,
-				   dragView        =64};
+				   adding2PShape   =56,
+				   addingPolyline  =64,
+				   addingShape	   =120,
+				   dragView        =124};
 
 	private:
 	DiagramView(const DiagramView &);
@@ -67,6 +69,7 @@ class DiagramView : public QGraphicsView {
 	QImage image_to_add_;
 	QetShapeItem *newShapeItem;
 	QPointF rubber_band_origin;
+	bool m_polyline_added;
 	
 	// methods
 	public:
@@ -88,6 +91,7 @@ class DiagramView : public QGraphicsView {
 	void addLine();
 	void addRectangle();
 	void addEllipse();
+	void addPolyline();
 	void editImage();
 	void editShape();
 	IndependentTextItem *addDiagramTextAtPos(const QPointF &, const QString &text = 0);

sources/qetdiagrameditor.cpp

@@ -348,12 +348,14 @@ void QETDiagramEditor::actions() {
 	QAction *add_line	   = m_add_item_actions_group.addAction( QET::Icons::PartLine,      tr("Ajouter une liaison mecanique") );
 	QAction *add_rectangle = m_add_item_actions_group.addAction( QET::Icons::PartRectangle, tr("Ajouter une zone rectangle")	);
 	QAction *add_ellipse   = m_add_item_actions_group.addAction( QET::Icons::PartEllipse,   tr("Ajouter une zone ellipse")		);
+	QAction *add_polyline  = m_add_item_actions_group.addAction( QET::Icons::PartPolygon,	tr("Ajouter une zone polyligne")    );
 
 	connect( add_text,      SIGNAL( triggered() ), this, SLOT( slot_addText()      ) );
 	connect( add_image,     SIGNAL( triggered() ), this, SLOT( slot_addImage()     ) );
 	connect( add_line,      SIGNAL( triggered() ), this, SLOT( slot_addLine()      ) );
 	connect( add_rectangle, SIGNAL( triggered() ), this, SLOT( slot_addRectangle() ) );
 	connect( add_ellipse,   SIGNAL( triggered() ), this, SLOT( slot_addEllipse()   ) );
+	connect( add_polyline,  SIGNAL( triggered() ), this, SLOT( slot_addPolyline()  ) );
 
 	foreach(QAction *action, m_add_item_actions_group.actions()) action->setCheckable(true);
 
@@ -1557,6 +1559,14 @@ void QETDiagramEditor::slot_addEllipse() {
 	if (DiagramView *dv = currentDiagram()) dv -> addEllipse();
 }
 
+/**
+ * @brief QETDiagramEditor::slot_addPolyline
+ * add polyline to current diagram
+ */
+void QETDiagramEditor::slot_addPolyline() {
+	if (DiagramView *dv = currentDiagram()) dv -> addPolyline();
+}
+
 /**
  * @brief QETDiagramEditor::slot_editSelection
  * edit the selected item if he can be edited and if only  one item is selected

sources/qetdiagrameditor.h

@@ -132,6 +132,7 @@ class QETDiagramEditor : public QETMainWindow {
 	void slot_addLine();
 	void slot_addRectangle();
 	void slot_addEllipse();
+	void slot_addPolyline();
 	void slot_editSelection();
 	void setWindowedMode();
 	void setTabbedMode();

sources/qetgraphicsitem/qetshapeitem.cpp

@@ -19,6 +19,7 @@
 #include "diagramcommands.h"
 #include "createdxf.h"
 #include "diagram.h"
+#include "qet.h"
 
 
 /**
@@ -37,6 +38,7 @@ QetShapeItem::QetShapeItem(QPointF p1, QPointF p2, ShapeType type, QGraphicsItem
 	m_P2 (Diagram::snapToGrid(p2))
 
 {
+	if (type == Polyline) m_polygon << m_P1 << m_P2;
 	setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
 }
 
@@ -57,11 +59,10 @@ void QetShapeItem::setStyle(Qt::PenStyle newStyle)
 
 /**
  * @brief QetShapeItem::scale
- * Preview the scale of this item to factor
+ * Scale this item by (factor / 100 ).
  * @param factor
  */
 void QetShapeItem::previewScale(int factor) {
-	setTransformOriginPoint(boundingRect().center());
 	if (factor >= 1 && factor <= 200) {
 		qreal new_scale = factor;
 		new_scale /= 100;
@@ -71,14 +72,34 @@ void QetShapeItem::previewScale(int factor) {
 
 /**
  * @brief QetShapeItem::setP2
- * Set the second point of this item
+ * Set the second point of this item.
+ * If this item is a polyline,
+ * the last point of the polyline is replaced by P2.
  * @param P2
  */
 void QetShapeItem::setP2(QPointF P2) {
 	P2 = Diagram::snapToGrid(P2);
+
+	if (m_shapeType == Polyline) {
+		prepareGeometryChange();
+		m_polygon.replace(m_polygon.size()-1, P2);
+	}
+	else {
 		if (P2 == m_P2) return;
 		prepareGeometryChange();
 		m_P2 = P2;
+	}
+	setTransformOriginPoint(boundingRect().center());
+}
+
+/**
+ * @brief QetShapeItem::setNextPoint
+ * Add a new point to the curent polygon
+ * @param P the new point.
+ */
+void QetShapeItem::setNextPoint(QPointF P) {
+	prepareGeometryChange();
+	m_polygon.append(Diagram::snapToGrid(P));
 	setTransformOriginPoint(boundingRect().center());
 }
 
@@ -87,6 +108,9 @@ void QetShapeItem::setP2(QPointF P2) {
  * @return the bounding rect of this item
  */
 QRectF QetShapeItem::boundingRect() const {
+	if (m_shapeType == Polyline)
+		return ( shape().boundingRect());
+
 	QRectF b(m_P1, m_P2);
 	return b.normalized();
 }
@@ -112,6 +136,9 @@ QPainterPath QetShapeItem::shape() const {
 		case Ellipse:
 			path.addEllipse(boundingRect());
 			break;
+		case Polyline:
+			path.addPolygon(m_polygon);
+			break;
 		default:
 			Q_ASSERT(false);
 			break;
@@ -129,6 +156,7 @@ void QetShapeItem::changeGraphicsItem(const ShapeType &newtype) {
 	if (newtype == m_shapeType) return;
 	prepareGeometryChange();
 	m_shapeType = newtype;
+	setTransformOriginPoint(boundingRect().center());
 }
 
 /**
@@ -145,8 +173,6 @@ void QetShapeItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *opti
 	QPen pen;
 	pen.setStyle(m_shapeStyle);
 	if (isSelected()) pen.setColor(Qt::red);
-	// Disable Antialiasing
-	painter -> setRenderHint(QPainter::Antialiasing, false);
 	painter->setPen(pen);
 
 	// TODO for printing line type on Windows
@@ -165,6 +191,9 @@ void QetShapeItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *opti
 		case Ellipse:
 			painter->drawEllipse(boundingRect());
 			break;
+		case Polyline:
+			painter->drawPolyline(m_polygon);
+			break;
 	}
 }
 
@@ -178,10 +207,19 @@ bool QetShapeItem::fromXml(const QDomElement &e) {
 	if (e.tagName() != "shape") return (false);
 
 	m_shapeStyle = Qt::PenStyle(e.attribute("style","0").toInt());
+
+	if (e.attribute("type", "0").toInt() != Polyline) {
 		m_P1.setX(e.attribute("x1", 0).toDouble());
 		m_P1.setY(e.attribute("y1", 0).toDouble());
 		m_P2.setX(e.attribute("x2", 0).toDouble());
 		m_P2.setY(e.attribute("y2", 0).toDouble());
+	}
+
+	else {
+		foreach(QDomElement de, QET::findInDomElement(e, "points", "point")) {
+			m_polygon << QPointF(de.attribute("x", 0).toDouble(), de.attribute("y", 0).toDouble());
+		}
+	}
 
 	changeGraphicsItem(QetShapeItem::ShapeType(e.attribute("type","0").toInt()));
 	return (true);
@@ -199,10 +237,25 @@ QDomElement QetShapeItem::toXml(QDomDocument &document) const {
 	//write some attribute
 	result.setAttribute("type", QString::number(m_shapeType));
 	result.setAttribute("style", QString::number(m_shapeStyle));
+
+	if (m_shapeType != Polyline) {
 		result.setAttribute("x1", mapToScene(m_P1).x());
 		result.setAttribute("y1", mapToScene(m_P1).y());
 		result.setAttribute("x2", mapToScene(m_P2).x());
 		result.setAttribute("y2", mapToScene(m_P2).y());
+	}
+
+	else {
+		QDomElement points = document.createElement("points");
+		foreach(QPointF p, m_polygon) {
+			QDomElement point = document.createElement("point");
+			QPointF pf = mapToScene(p);
+			point.setAttribute("x", pf.x());
+			point.setAttribute("y", pf.y());
+			points.appendChild(point);
+		}
+		result.appendChild(points);
+	}
 
 	return(result);
 }

sources/qetgraphicsitem/qetshapeitem.h

@@ -33,7 +33,8 @@ class QetShapeItem : public QetGraphicsItem
 	Q_ENUMS(ShapeType)
 	enum ShapeType {Line	  =0,
 					Rectangle =1,
-					Ellipse	  =2};
+					Ellipse	  =2,
+					Polyline  =3 };
 
 	enum { Type = UserType + 1008 };
 
@@ -56,6 +57,7 @@ class QetShapeItem : public QetGraphicsItem
 	virtual void editProperty();
 
 	void setP2		  (QPointF P2);
+	void setNextPoint (QPointF P);
 
 	QRectF boundingRect() const;
 	QPainterPath shape()  const;
@@ -74,5 +76,6 @@ class QetShapeItem : public QetGraphicsItem
 	ShapeType    m_shapeType;
 	Qt::PenStyle m_shapeStyle;
 	QPointF		 m_P1, m_P2;
+	QPolygonF	 m_polygon;
 };
 #endif // QETSHAPEITEM_H