Element editor : start work for change how draw primitive (work in progress)

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@3451 bfdf4180-ca20-0410-9c96-a3a8aa849046

qelectrotech.pro

@@ -63,17 +63,28 @@ DEFINES += QET_ALLOW_OVERRIDE_CD_OPTION
 
 TEMPLATE = app
 DEPENDPATH += .
-INCLUDEPATH += sources sources/editor sources/titleblock sources/ui sources/qetgraphicsitem sources/richtext sources/factory sources/properties sources/dvevent
+INCLUDEPATH += sources \
+               sources/titleblock \
+               sources/ui sources/qetgraphicsitem \
+               sources/richtext \
+               sources/factory \
+               sources/properties \
+               sources/dvevent \
+               sources/editor \
+               sources/editor/esevent
+
 
 # Fichiers sources
 HEADERS += $$files(sources/*.h) $$files(sources/ui/*.h) $$files(sources/editor/*.h) $$files(sources/titleblock/*.h) $$files(sources/richtext/*.h) $$files(sources/qetgraphicsitem/*.h) $$files(sources/factory/*.h) \
            $$files(sources/properties/*.h) \
            $$files(sources/editor/ui/*.h) \
+           $$files(sources/editor/esevent/*.h) \
            $$files(sources/dvevent/*.h)
 
 SOURCES += $$files(sources/*.cpp) $$files(sources/editor/*.cpp) $$files(sources/titleblock/*.cpp) $$files(sources/richtext/*.cpp) $$files(sources/ui/*.cpp) $$files(sources/qetgraphicsitem/*.cpp) $$files(sources/factory/*.cpp) \
            $$files(sources/properties/*.cpp) \
            $$files(sources/editor/ui/*.cpp) \
+           $$files(sources/editor/esevent/*.cpp) \
            $$files(sources/dvevent/*.cpp)
 
 # Liste des fichiers qui seront incorpores au binaire en tant que ressources Qt

sources/editor/elementscene.cpp

@@ -31,6 +31,9 @@
 #include "elementcontent.h"
 #include "nameslist.h"
 #include "ui/elementpropertieseditorwidget.h"
+#include "eseventinterface.h"
+
+#include <QKeyEvent>
 
 /**
 	Constructeur
@@ -41,6 +44,7 @@ ElementScene::ElementScene(QETElementEditor *editor, QObject *parent) :
 	QGraphicsScene(parent),
 	m_elmt_type("simple"),
 	qgi_manager(this),
+	m_event_interface(nullptr),
 	element_editor(editor),
 	decorator_(0)
 {
@@ -66,13 +70,6 @@ void ElementScene::slot_move() {
 	behavior = Normal;
 }
 
-/**
-	Passe la scene en mode "ajout de ligne"
-*/
-void ElementScene::slot_addLine() {
-	behavior = Line;
-}
-
 /**
 	Passe la scene en mode "ajout de rectangle"
 */
@@ -135,8 +132,19 @@ void ElementScene::slot_addTextField() {
 	@param e objet decrivant l'evenement
 */
 void ElementScene::mouseMoveEvent(QGraphicsSceneMouseEvent *e) {
+	if (m_event_interface) {
+		if (m_event_interface -> mouseMoveEvent(e)) {
+			if (m_event_interface->isFinish()) {
+				emit(partsAdded());
+				emit(needNormalMode());
+				delete m_event_interface; m_event_interface = nullptr;
+			}
+			return;
+		}
+	}
+
 	QPointF event_pos = e -> scenePos();
-	if (mustSnapToGrid(e)) snapToGrid(event_pos);
+	if (mustSnapToGrid(e)) event_pos = snapToGrid(event_pos);
 	
 	if (behavior != Polygon && current_polygon != NULL) current_polygon = NULL;
 	if (behavior == PasteArea) {
@@ -151,9 +159,6 @@ void ElementScene::mouseMoveEvent(QGraphicsSceneMouseEvent *e) {
 	QPolygonF temp_polygon;
 	if (e -> buttons() & Qt::LeftButton) {
 		switch(behavior) {
-			case Line:
-				current_line -> setLine(QLineF(current_line -> line().p1(), event_pos));
-				break;
 			case Rectangle:
 				temp_rect = current_rectangle -> rect();
 				temp_rect.setBottomRight(event_pos);
@@ -193,17 +198,23 @@ void ElementScene::mouseMoveEvent(QGraphicsSceneMouseEvent *e) {
 	@param e objet decrivant l'evenement
 */
 void ElementScene::mousePressEvent(QGraphicsSceneMouseEvent *e) {
+	if (m_event_interface) {
+		if (m_event_interface -> mousePressEvent(e)) {
+			if (m_event_interface->isFinish()) {
+				emit(partsAdded());
+				emit(needNormalMode());
+				delete m_event_interface; m_event_interface = nullptr;
+			}
+			return;
+		}
+	}
 	QPointF event_pos = e -> scenePos();
-	if (mustSnapToGrid(e)) snapToGrid(event_pos);
+	if (mustSnapToGrid(e)) event_pos = snapToGrid(event_pos);
 	
 	if (behavior != Polygon && current_polygon != NULL) current_polygon = NULL;
 	QPolygonF temp_polygon;
 	if (e -> button() & Qt::LeftButton) {
 		switch(behavior) {
-			case Line:
-				current_line = new PartLine(element_editor, 0, this);
-				current_line -> setLine(QLineF(event_pos, event_pos));
-				break;
 			case Rectangle:
 				current_rectangle = new PartRectangle(element_editor, 0, this);
 				current_rectangle -> setRect(QRectF(event_pos, QSizeF(0.0, 0.0)));
@@ -240,8 +251,19 @@ void ElementScene::mousePressEvent(QGraphicsSceneMouseEvent *e) {
 	@param e objet decrivant l'evenement
 */
 void ElementScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *e) {
+	if (m_event_interface) {
+		if (m_event_interface -> mouseReleaseEvent(e)) {
+			if (m_event_interface->isFinish()) {
+				emit(partsAdded());
+				emit(needNormalMode());
+				delete m_event_interface; m_event_interface = nullptr;
+			}
+			return;
+		}
+	}
+
 	QPointF event_pos = e -> scenePos();
-	if (mustSnapToGrid(e)) snapToGrid(event_pos);
+	if (mustSnapToGrid(e)) event_pos = snapToGrid(event_pos);
 	
 	PartTerminal *terminal;
 	PartText *text;
@@ -258,12 +280,6 @@ void ElementScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *e) {
 	
 	if (e -> button() & Qt::LeftButton) {
 		switch(behavior) {
-			case Line:
-				if (qgiManager().manages(current_line)) break;
-				undo_stack.push(new AddPartCommand(tr("ligne"), this, current_line));
-				emit(partsAdded());
-				endCurrentBehavior(e);
-				break;
 			case Rectangle:
 				if (qgiManager().manages(current_rectangle)) break;
 				current_rectangle -> setRect(current_rectangle -> rect().normalized());
@@ -322,6 +338,25 @@ void ElementScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *e) {
 	} else QGraphicsScene::mouseReleaseEvent(e);
 }
 
+/**
+ * @brief ElementScene::keyPressEvent
+ * manage key press event
+ * @param event
+ */
+void ElementScene::keyPressEvent(QKeyEvent *event) {
+	if (m_event_interface) {
+		if (m_event_interface -> keyPressEvent(event)) {
+			if (m_event_interface->isFinish()) {
+				emit(partsAdded());
+				emit(needNormalMode());
+				delete m_event_interface; m_event_interface = nullptr;
+			}
+			return;
+		}
+	}
+	QGraphicsScene::keyPressEvent(event);
+}
+
 /**
 	Dessine l'arriere-plan de l'editeur, cad l'indicateur de hotspot.
 	@param p Le QPainter a utiliser pour dessiner
@@ -357,6 +392,16 @@ void ElementScene::endCurrentBehavior(const QGraphicsSceneMouseEvent *event) {
 	}
 }
 
+/**
+ * @brief ElementScene::setInterface
+ * Set a new event interface
+ * @param interface
+ */
+void ElementScene::setInterface(ESEventInterface *interface) {
+	if (m_event_interface) delete m_event_interface;
+	m_event_interface = interface;
+}
+
 /**
 	@return la taille horizontale de la grille
 */
@@ -620,6 +665,10 @@ void ElementScene::contextMenu(QContextMenuEvent *event) {
 		element_editor -> contextMenu(event);
 }
 
+QETElementEditor* ElementScene::editor() const {
+	return element_editor;
+}
+
 /**
 	Selectionne une liste de parties
 	@param content liste des parties a selectionner
@@ -1097,9 +1146,10 @@ void ElementScene::initPasteArea() {
 	@param point une reference vers un QPointF. Cet objet sera modifie.
 	
 */
-void ElementScene::snapToGrid(QPointF &point) {
+QPointF ElementScene::snapToGrid(QPointF point) {
 	point.rx() = qRound(point.x() / x_grid) * x_grid;
 	point.ry() = qRound(point.y() / y_grid) * y_grid;
+	return point;
 }
 
 /**

sources/editor/elementscene.h

@@ -23,15 +23,17 @@
 #include "qgimanager.h"
 #include "elementcontent.h"
 #include "diagramcontext.h"
+
 class CustomElementPart;
 class ElementEditionCommand;
 class ElementPrimitiveDecorator;
 class QETElementEditor;
-class PartLine;
 class PartRectangle;
 class PartEllipse;
 class PartPolygon;
 class PartArc;
+class ESEventInterface;
+class QKeyEvent;
 /**
 	This class is the canvas allowing the visual edition of an electrial element.
 	It displays the various primitives composing the drawing of the element, the
@@ -43,7 +45,7 @@ class ElementScene : public QGraphicsScene {
 	
 	// enum
 	public:
-	enum Behavior { Normal, Line, Rectangle, Circle, Ellipse, Polygon, Text, Terminal, Arc, TextField, PasteArea };
+	enum Behavior { Normal, Rectangle, Circle, Ellipse, Polygon, Text, Terminal, Arc, TextField, PasteArea };
 	enum ItemOption {
 		SortByZValue = 1,
 		IncludeTerminals = 2,
@@ -64,57 +66,57 @@ class ElementScene : public QGraphicsScene {
 	
 	// attributes
 	private:
-	/// List of localized names
-	NamesList _names;
-	/// Extra informations
-	QString informations_;
-	/// element type
-	QString m_elmt_type;
-	/// element kind info
-	DiagramContext m_elmt_kindInfo;
-	/// QGraphicsItem manager
-	QGIManager qgi_manager;
-	/// Undo stack
-	QUndoStack undo_stack;
-	/**
-		fsi_pos (first selected item pos) : Position of the forst selected item: used
-		to cancel mouse movements; also used to handle movements using keybard
-		arrwows.
-	*/
-	QPointF fsi_pos;
-	QPointF moving_press_pos;
-	bool moving_parts_;
+		/// List of localized names
+		NamesList _names;
+		/// Extra informations
+		QString informations_;
+		/// element type
+		QString m_elmt_type;
+		/// element kind info
+		DiagramContext m_elmt_kindInfo;
+		/// QGraphicsItem manager
+		QGIManager qgi_manager;
+		/// Undo stack
+		QUndoStack undo_stack;
+		/**
+			fsi_pos (first selected item pos) : Position of the forst selected item: used
+			to cancel mouse movements; also used to handle movements using keybard
+			arrwows.
+		*/
+		QPointF fsi_pos;
+		QPointF moving_press_pos;
+		bool moving_parts_;
 	
-	/// Variables related to drawing
-	Behavior behavior;
-	PartLine *current_line;
-	PartRectangle *current_rectangle;
-	PartEllipse *current_ellipse;
-	PartPolygon *current_polygon;
-	PartArc *current_arc;
-	QETElementEditor *element_editor;
+		/// Variables related to drawing
+		ESEventInterface *m_event_interface;
+		Behavior behavior;
+		PartRectangle *current_rectangle;
+		PartEllipse *current_ellipse;
+		PartPolygon *current_polygon;
+		PartArc *current_arc;
+		QETElementEditor *element_editor;
 	
-	/// Variables to manage the paste area on the scene
-	QGraphicsRectItem *paste_area_;
-	QRectF defined_paste_area_;
+		/// Variables to manage the paste area on the scene
+		QGraphicsRectItem *paste_area_;
+		QRectF defined_paste_area_;
 	
-	/// Variables to handle copy/paste with offset
-	QString last_copied_;
+		/// Variables to handle copy/paste with offset
+		QString last_copied_;
 	
-	/// Decorator item displayed when at least one item is selected
-	ElementPrimitiveDecorator *decorator_;
+		/// Decorator item displayed when at least one item is selected
+		ElementPrimitiveDecorator *decorator_;
 	
-	///< Size of the horizontal grid step
-	int x_grid;
-	///< Size of the vertical grid step
-	int y_grid;
+		///< Size of the horizontal grid step
+		int x_grid;
+		///< Size of the vertical grid step
+		int y_grid;
 	
 	// methods
 	public:
+		void setInterface (ESEventInterface *interface);
+		QPointF snapToGrid(QPointF point);
 	void setNames(const NamesList &);
 	NamesList names() const;
-	bool internalConnections();
-	void setInternalConnections(bool);
 	QString informations() const;
 	void setInformations(const QString &);
 	QString elementType () const {return m_elmt_type;}
@@ -140,11 +142,14 @@ class ElementScene : public QGraphicsScene {
 	void copy();
 	void paste();
 	void contextMenu (QContextMenuEvent *event);
+	QETElementEditor* editor() const;
 	
 	protected:
-	virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *);
-	virtual void mousePressEvent(QGraphicsSceneMouseEvent *);
-	virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *);
+		virtual void mouseMoveEvent    (QGraphicsSceneMouseEvent *);
+		virtual void mousePressEvent   (QGraphicsSceneMouseEvent *);
+		virtual void mouseReleaseEvent (QGraphicsSceneMouseEvent *);
+		virtual void keyPressEvent     (QKeyEvent *event);
+
 	virtual void drawForeground(QPainter *, const QRectF &);
 	virtual void endCurrentBehavior(const QGraphicsSceneMouseEvent *);
 	
@@ -156,7 +161,6 @@ class ElementScene : public QGraphicsScene {
 	ElementContent addContentAtPos(const ElementContent &, const QPointF &, QString * = 0);
 	void addPrimitive(QGraphicsItem *);
 	void initPasteArea();
-	void snapToGrid(QPointF &);
 	bool mustSnapToGrid(QGraphicsSceneMouseEvent *);
 	static bool zValueLessThan(QGraphicsItem *, QGraphicsItem *);
 	QMutex *decorator_lock_;
@@ -164,7 +168,6 @@ class ElementScene : public QGraphicsScene {
 	
 	public slots:
 	void slot_move();
-	void slot_addLine();
 	void slot_addRectangle();
 	void slot_addCircle();
 	void slot_addEllipse();

sources/editor/esevent/eseventaddline.cpp

@@ -0,0 +1,103 @@
+/*
+	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 <QGraphicsSceneMouseEvent>
+#include <QObject>
+
+#include "eseventaddline.h"
+#include "elementscene.h"
+#include "qetelementeditor.h"
+#include "partline.h"
+#include "editorcommands.h"
+
+/**
+ * @brief ESEventAddLine::ESEventAddLine
+ * Constructor
+ * @param scene : scene where we operate this action
+ */
+ESEventAddLine::ESEventAddLine(ElementScene *scene) :
+	ESEventInterface (scene),
+	m_line           (nullptr)
+{}
+
+/**
+ * @brief ESEventAddLine::~ESEventAddLine
+ * destructor
+ */
+ESEventAddLine::~ESEventAddLine() {
+	if (m_running || m_abort)
+		delete m_line;
+}
+
+/**
+ * @brief ESEventAddLine::mousePressEvent
+ * @param event
+ * @return
+ */
+bool ESEventAddLine::mousePressEvent(QGraphicsSceneMouseEvent *event) {
+
+	if (event -> button() == Qt::LeftButton) {
+
+		if (! m_running) m_running = true;
+		QPointF pos = m_scene -> snapToGrid(event -> scenePos());
+
+		//Create new line
+		if (!m_line) {
+			m_line = new PartLine(m_editor, 0, m_scene);
+			m_line  -> setLine(QLineF(pos, pos));
+			return true;
+		}
+
+		//Add new line to scene
+		m_line  -> setLine(QLineF(m_line->line().p1(), pos));
+		m_scene -> undoStack().push(new AddPartCommand(QObject::tr("ligne"), m_scene, m_line));
+
+		//Set m_line to nullptr for create new line at next mouse press
+		m_line = nullptr;
+
+		return true;
+	}
+
+	//Remove the current line if exist
+	//or finish if no line
+	if (event -> button() == Qt::RightButton) {
+		if (m_line) {
+			delete m_line; m_line = nullptr;
+		}
+		else {
+			m_running = false;
+		}
+		return true;
+	}
+
+	return false;
+}
+
+/**
+ * @brief ESEventAddLine::mouseMoveEvent
+ * @param event
+ * @return
+ */
+bool ESEventAddLine::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
+	updateHelpCross (event -> scenePos());
+
+	if (!m_line) return false;
+
+	QPointF pos = m_scene -> snapToGrid(event -> scenePos());
+	m_line -> setLine(QLineF(m_line->line().p1(), pos));
+	return true;
+}

sources/editor/esevent/eseventaddline.h

@@ -0,0 +1,40 @@
+/*
+	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/>.
+*/
+#ifndef ESEVENTADDLINE_H
+#define ESEVENTADDLINE_H
+
+#include "eseventinterface.h"
+
+class ElementScene;
+class PartLine;
+class QGraphicsSceneMouseEvent;
+
+class ESEventAddLine : public ESEventInterface
+{
+	public:
+		ESEventAddLine(ElementScene *scene);
+		virtual ~ESEventAddLine();
+
+		virtual bool mousePressEvent(QGraphicsSceneMouseEvent *event);
+		virtual bool mouseMoveEvent (QGraphicsSceneMouseEvent *event);
+
+	private:
+		PartLine *m_line;
+};
+
+#endif // ESEVENTADDLINE_H

sources/editor/esevent/eseventinterface.cpp

@@ -0,0 +1,117 @@
+/*
+	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 "eseventinterface.h"
+#include "elementscene.h"
+#include "qetelementeditor.h"
+#include <QGraphicsSceneMouseEvent>
+
+ESEventInterface::ESEventInterface(ElementScene *scene) :
+	m_scene      (scene),
+	m_editor     (scene->editor()),
+	m_help_horiz (nullptr),
+	m_help_verti (nullptr),
+	m_running    (false),
+	m_abort      (false)
+{
+	foreach (QGraphicsView *qgv, m_scene->views())
+		qgv->setContextMenuPolicy(Qt::NoContextMenu);
+}
+
+ESEventInterface::~ESEventInterface() {
+	delete m_help_horiz;
+	delete m_help_verti;
+
+	foreach (QGraphicsView *qgv, m_scene->views())
+		qgv->setContextMenuPolicy(Qt::DefaultContextMenu);
+}
+
+bool ESEventInterface::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event) {
+	Q_UNUSED (event);
+	return false;
+}
+
+bool ESEventInterface::mousePressEvent(QGraphicsSceneMouseEvent *event) {
+	Q_UNUSED (event);
+	return false;
+}
+
+bool ESEventInterface::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
+	Q_UNUSED (event);
+	return false;
+}
+
+bool ESEventInterface::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) {
+	Q_UNUSED (event);
+	return false;
+}
+
+bool ESEventInterface::wheelEvent(QGraphicsSceneWheelEvent *event) {
+	Q_UNUSED (event);
+	return false;
+}
+
+/**
+ * @brief ESEventInterface::keyPressEvent
+ * By default, press escape key abort the curent action
+ * @param event
+ * @return
+ */
+bool ESEventInterface::keyPressEvent(QKeyEvent *event) {
+	if (event->key() == Qt::Key_Escape) {
+		m_running = false;
+		m_abort = true;
+		return true;
+	}
+	return false;
+}
+
+bool ESEventInterface::KeyReleaseEvent(QKeyEvent *event) {
+	Q_UNUSED (event);
+	return false;
+}
+
+bool ESEventInterface::isRunning() const {
+	return m_running;
+}
+
+bool ESEventInterface::isFinish() const {
+	return !m_running;
+}
+
+void ESEventInterface::updateHelpCross(const QPointF &p) {
+	//If line isn't created yet, we create it.
+	if (!m_help_horiz || !m_help_verti) {
+		QPen pen;
+		pen.setColor(Qt::darkBlue);
+		if (!m_help_horiz) {
+			m_help_horiz = new QGraphicsLineItem(-10000, 0, 10000, 0, 0, m_scene);
+			m_help_horiz -> setPen(pen);
+		}
+		if (!m_help_verti) {
+			m_help_verti = new QGraphicsLineItem(0, -10000, 0, 10000, 0, m_scene);
+			m_help_verti -> setPen(pen);
+		}
+	}
+
+	//Update the position of the cross
+	QPointF point = m_scene -> snapToGrid(p);
+
+	m_help_horiz -> setY(point.y());
+	m_help_verti -> setX(point.x());
+
+}

sources/editor/esevent/eseventinterface.h

@@ -0,0 +1,55 @@
+/*
+	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/>.
+*/
+#ifndef ESEVENTINTERFACE_H
+#define ESEVENTINTERFACE_H
+
+class QGraphicsSceneMouseEvent;
+class QGraphicsSceneWheelEvent;
+class QKeyEvent;
+class ElementScene;
+class QETElementEditor;
+class QGraphicsLineItem;
+class QPointF;
+
+class ESEventInterface
+{
+	public:
+		ESEventInterface(ElementScene *scene);
+		virtual ~ESEventInterface();
+
+		virtual bool mouseDoubleClickEvent (QGraphicsSceneMouseEvent *event);
+		virtual bool mousePressEvent       (QGraphicsSceneMouseEvent *event);
+		virtual bool mouseMoveEvent        (QGraphicsSceneMouseEvent *event);
+		virtual bool mouseReleaseEvent     (QGraphicsSceneMouseEvent *event);
+		virtual bool wheelEvent            (QGraphicsSceneWheelEvent *event);
+		virtual bool keyPressEvent         (QKeyEvent *event);
+		virtual bool KeyReleaseEvent       (QKeyEvent *event);
+		virtual bool isRunning () const;
+		virtual bool isFinish  () const;
+
+	protected:
+		void updateHelpCross (const QPointF &p);
+
+	protected:
+		ElementScene     *m_scene;
+		QETElementEditor *m_editor;
+		QGraphicsLineItem *m_help_horiz, *m_help_verti;
+		bool m_running, m_abort;
+};
+
+#endif // ESEVENTINTERFACE_H