Element editor: add ellipse is managed by an esevent

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@3461 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/editor/esevent/eseventaddellipse.cpp

@@ -0,0 +1,106 @@
+/*
+	Copyright 2006-2014 The QElectroTech Team
+	This file is part of QElectroTech.
+
+	QElectroTech is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 2 of the License, or
+	(at your option) any later version.
+
+	QElectroTech is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include <QObject>
+
+#include "eseventaddellipse.h"
+#include "partellipse.h"
+#include "editorcommands.h"
+#include "elementscene.h"
+
+/**
+ * @brief ESEventAddEllipse::ESEventAddEllipse
+ * @param scene
+ */
+ESEventAddEllipse::ESEventAddEllipse(ElementScene *scene) :
+	ESEventInterface(scene),
+	m_ellipse(nullptr)
+{}
+
+/**
+ * @brief ESEventAddEllipse::~ESEventAddEllipse
+ */
+ESEventAddEllipse::~ESEventAddEllipse() {
+	if (m_running || m_abort){
+		delete m_ellipse;
+	}
+}
+
+/**
+ * @brief ESEventAddEllipse::mousePressEvent
+ * @param event
+ * @return
+ */
+bool ESEventAddEllipse::mousePressEvent(QGraphicsSceneMouseEvent *event) {
+	if (event -> button() == Qt::LeftButton) {
+		if(!m_running) m_running = true;
+		QPointF pos = m_scene->snapToGrid(event -> scenePos());
+
+		//create new ellpise
+		if (!m_ellipse) {
+			m_ellipse = new PartEllipse(m_editor, 0, m_scene);
+			m_ellipse -> setRect(QRectF(pos, pos));
+			m_origin = pos;
+			return true;
+		}
+
+		//Add ellipse to scene
+		m_ellipse  -> setRect(m_ellipse -> rect().normalized());
+		m_scene -> undoStack().push(new AddPartCommand(QObject::tr("Rectangle"), m_scene, m_ellipse));
+
+		//Set m_ellipse to nullptr for create new ellipse at next mouse press
+		m_ellipse = nullptr;
+
+		return true;
+	}
+	return false;
+}
+
+/**
+ * @brief ESEventAddRect::mouseMoveEvent
+ * @param event
+ * @return
+ */
+bool ESEventAddEllipse::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
+	updateHelpCross(event -> scenePos());
+	if (!m_ellipse) return false;
+
+	QPointF mouse_pos = m_scene -> snapToGrid(event -> scenePos());
+
+	qreal width  = (mouse_pos.x() - m_origin.x())*2;
+	qreal height = (mouse_pos.y() - m_origin.y())*2;
+
+	QPointF pos(m_origin.x() - width/2,
+				m_origin.y() - height/2);
+
+	m_ellipse -> setRect(QRectF(pos, QSizeF(width, height)));
+	return true;
+}
+
+/**
+ * @brief ESEventAddEllipse::mouseReleaseEvent
+ * @param event
+ * @return
+ */
+bool ESEventAddEllipse::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) {
+	if (event -> button() == Qt::RightButton) {
+		if (m_ellipse) {delete m_ellipse; m_ellipse = nullptr;}
+		else        {m_running = false;}
+		return true;
+	}
+	return false;
+}