Posted by emanuel on Apr 12, 2025; 12:53am
URL: https://forum.librecad.org/fixed-thanks-please-a-tip-for-the-RS-Eventhandler-tp5726883p5726899.html

I'm not really making any progress.

I have a class:

class LC_OverlaySlideAction:public RS_ActionInterface {
public:
    LC_OverlaySlideAction(
        const char *name,
        RS_EntityContainer &container,
        RS_GraphicView &graphicView,
        RS2::ActionType actionType = RS2::ActionNone);

    ~LC_OverlaySlideAction() override = default;

    void init(int status) override;
    void finish(bool updateTB = true) override;
    void trigger() override;
    void mouseMoveEvent(QMouseEvent* e) override;
    void mousePressEvent(QMouseEvent* e) override;
    void mouseReleaseEvent(QMouseEvent* e) override;

protected:
    void drawOverlaySlide(const QString &fileName);
private:
    bool middleButtonPressed{false};
};

but when I end the action with "ESC," RS_EventHandler::killAllActions() always calls RS_ActionInterface::finish(), never the overridden LC_OverlaySlideAction::finish().

Why doesn't this work? I have to reset values on finish.



Even weirder is, if I add just a virtual void bla() {} to the public: property of the RS_ActionInterface class, the entire LC crashes.
If I add it in different places, LC crashes in completely different places.
Once with QWidget attributes, or RS_Snapper.
Strange behavior.

class RS_ActionInterface : public RS_Snapper {
Q_OBJECT
public:
    RS_ActionInterface(const char* name,
                       RS_EntityContainer& container,
                       RS_GraphicView& graphicView,
                       RS2::ActionType actionType = RS2::ActionNone);
           ~RS_ActionInterface() override;

    virtual RS2::ActionType rtti() const;

    void setName(const char* _name);
    QString getName();

    virtual void init(int status);
   
    /* virtual void bla() {} <<<<<<< crashes QWidget attributes ??? */
   
    virtual void mouseMoveEvent(QMouseEvent*);
    virtual void mousePressEvent(QMouseEvent*);
    virtual void mouseReleaseEvent(QMouseEvent*);
    virtual void keyPressEvent(QKeyEvent* e);
    virtual void keyReleaseEvent(QKeyEvent* e);
    virtual void coordinateEvent(RS_CoordinateEvent*);
    virtual void commandEvent(RS_CommandEvent*);
    virtual QStringList getAvailableCommands();
    virtual void setStatus(int status);
    int getStatus() const;
    virtual void trigger();
    virtual bool isFinished() const;
    virtual void setFinished();
    virtual void finish(bool updateTB = true );
    virtual void setPredecessor(RS_ActionInterface* pre);
    void suspend() override;
    void resume() override;
    virtual void hideOptions();
    virtual void showOptions();
   
    /* virtual void bla() {} <<<<<<< crashes RS_Snapper ??? */
   
    ...