Russian Qt Forum

void      QEditorScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
    QExGraphicsScene::mouseReleaseEvent(event);

    switch(work_state)
    {
    case    wsEditing:
   {
   //обработка в режиме редактора
   }
   break;
    case    wsRunningSHN:
        {
            //обработка в режиме исполнения
        }
        break;
    //и так далее для всех режимов
    }
}

class QExGraphicsScene : public QGraphicsScene
{
    Q_OBJECT

protected:

    void    mousePressEvent(QGraphicsSceneMouseEvent *event);
    void    mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
    void    mouseMoveEvent(QGraphicsSceneMouseEvent *event);
    void    contextMenuEvent(QGraphicsSceneContextMenuEvent *event);
...
};

void    QExGraphicsScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    emit sigMousePressEvent(event);
    QGraphicsScene::mousePressEvent(event);
}

void    QExGraphicsScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
    QGraphicsScene::mouseReleaseEvent(event);
    emit sigMouseReleaseEvent(event);
}

void    QExGraphicsScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
    QGraphicsScene::mouseMoveEvent(event);
    emit    sigMouseMoveEvent(event);
}

void    CArmEditor::createLogic()
{
connect(fproject->fieldView()->scene(),SIGNAL(sigContextMenu(QGraphicsSceneContextMenuEvent*)),this,SLOT(fieldContextMenu(QGraphicsSceneContextMenuEvent*)),Qt::DirectConnection);
    connect(fproject->fieldView()->scene(),SIGNAL(sigMousePressEvent(QGraphicsSceneMouseEvent*)),this,SLOT(sceneMousePressed(QGraphicsSceneMouseEvent*)),Qt::DirectConnection);
    connect(fproject->fieldView()->scene(),SIGNAL(sigMouseMoveEvent(QGraphicsSceneMouseEvent*)),this,SLOT(sceneMouseMoved(QGraphicsSceneMouseEvent*)),Qt::DirectConnection);
    connect(fproject->fieldView()->scene(),SIGNAL(sigMouseReleaseEvent(QGraphicsSceneMouseEvent*)),this,SLOT(sceneMouseReleased(QGraphicsSceneMouseEvent*)),Qt::DirectConnection);

#ifndef QEXGRAPHICSSCENE_H
#define QEXGRAPHICSSCENE_H

#include    "config.h"
#include    <QGraphicsScene>
#include    <QGraphicsItem>


class QExGraphicsScene : public QGraphicsScene
{
    Q_OBJECT

protected:

    void    mousePressEvent(QGraphicsSceneMouseEvent *event);
    void    mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
    void    mouseMoveEvent(QGraphicsSceneMouseEvent *event);
    void    contextMenuEvent(QGraphicsSceneContextMenuEvent *event);

public:

    explicit    QExGraphicsScene(QObject *parent = 0);

    void        detachDelegates();


//делегаты
    void        (*__mousePressEvent)(QExGraphicsScene * scene, QGraphicsSceneMouseEvent *event);
    void        (*__mouseReleaseEvent)(QExGraphicsScene * scene, QGraphicsSceneMouseEvent *event);
    void        (*__mouseMoveEvent)(QExGraphicsScene * scene, QGraphicsSceneMouseEvent *event);
    void        (*__contextMenuEvent)(QExGraphicsScene * scene, QGraphicsSceneContextMenuEvent *event);


signals:
};

#endif // QEXGRAPHICSSCENE_H

#include <QGraphicsSceneMouseEvent>
#include "qexgraphicsscene.h"

QExGraphicsScene::QExGraphicsScene(QObject *parent) :
    QGraphicsScene(parent)
{
    detachDelegates();
}

void    QExGraphicsScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    QGraphicsScene::mousePressEvent(event);
    if(__mousePressEvent) __mousePressEvent(this,event);
}

void    QExGraphicsScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
    QGraphicsScene::mouseReleaseEvent(event);
    if(__mouseReleaseEvent) __mouseReleaseEvent(this,event);
}

void    QExGraphicsScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
    QGraphicsScene::mouseMoveEvent(event);
    if(__mouseMoveEvent) __mouseMoveEvent(this,event);
}


void    QExGraphicsScene::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
{
    if(__contextMenuEvent) __contextMenuEvent(this,event);
}

void    QExGraphicsScene::detachDelegates()
{
    __mousePressEvent = NULL;
    __mouseReleaseEvent = NULL;
    __mouseMoveEvent = NULL;
    __contextMenuEvent = NULL;
}

...
    CArmEditor(QObject * parent = 0);
    ~CArmEditor();

    static  void    fieldMousePressed(QExGraphicsScene * scene, QGraphicsSceneMouseEvent *event);
    static  void    fieldMouseMoved(QExGraphicsScene * scene, QGraphicsSceneMouseEvent *event);
    static  void    fieldMouseReleased(QExGraphicsScene * scene, QGraphicsSceneMouseEvent *event);
    static  void    fieldContextMenu(QExGraphicsScene * scene, QGraphicsSceneContextMenuEvent *event);

void    CArmEditor::createLogic()
{

    fproject->fieldView()->scene()->__mousePressEvent = &CArmEditor::fieldMousePressed;
    fproject->fieldView()->scene()->__mouseMoveEvent = &CArmEditor::fieldMouseMoved;
    fproject->fieldView()->scene()->__mouseReleaseEvent = &CArmEditor::fieldMouseReleased;
    fproject->fieldView()->scene()->__contextMenuEvent = &CArmEditor::fieldContextMenu;

    /*
старый вариант со слотами    connect(fproject->fieldView()->scene(),SIGNAL(sigContextMenu(QGraphicsSceneContextMenuEvent*)),this,SLOT(fieldContextMenu(QGraphicsSceneContextMenuEvent*)),Qt::DirectConnection);
    connect(fproject->fieldView()->scene(),SIGNAL(sigMousePressEvent(QGraphicsSceneMouseEvent*)),this,SLOT(sceneMousePressed(QGraphicsSceneMouseEvent*)),Qt::DirectConnection);
    connect(fproject->fieldView()->scene(),SIGNAL(sigMouseMoveEvent(QGraphicsSceneMouseEvent*)),this,SLOT(sceneMouseMoved(QGraphicsSceneMouseEvent*)),Qt::DirectConnection);
    connect(fproject->fieldView()->scene(),SIGNAL(sigMouseReleaseEvent(QGraphicsSceneMouseEvent*)),this,SLOT(sceneMouseReleased(QGraphicsSceneMouseEvent*)),Qt::DirectConnection);
    connect(fproject->modulView()->scene(),SIGNAL(sigContextMenu(QGraphicsSceneContextMenuEvent*)),this,SLOT(modulesContextMenu(QGraphicsSceneContextMenuEvent*)),Qt::DirectConnection);
    */
...
}

void    CArmEditor::fieldMousePressed(QExGraphicsScene * scene, QGraphicsSceneMouseEvent *event)
{
    QEditorScene * fscene = (QEditorScene*)scene;

    switch(fscene->sceneAction)
    {
    case    saAddingItem:
    {
        if(event->button()==Qt::LeftButton)
        switch(fscene->addingObject)
        {
        case    otLight:
            fscene->createLight(event->scenePos());
            break;

        case    otSimpleIndicator:
            fscene->createIndicator(event->scenePos());
            break;
...
}