using mouse events of a QTextEdit made with the designer



  • My goal is to use mouseReleaseEvent() to copy the selection of a QTextEdit that was created in designer <widget class="QTextEdit" name="textEdit">.

    With the following code, a secondary QTextEdit is created. My desired feature does work... however, I didn't want to create a second QTextEdit, I wanted to deal with the existing one. How can I accomplish that?

    notepad.h

    #ifndef NOTEPAD_H
    #define NOTEPAD_H
    
    #include <QMainWindow>
    #include <QTextEdit>
    
    namespace Ui {
    class Notepad;
    class textEdit;
    }
    
    class Notepad : public QMainWindow
    {
        Q_OBJECT
    
    public:
        explicit Notepad(QWidget *parent = 0);
        ~Notepad();
    
    private slots:
        void on_quitButton_clicked();
    
    private:
        Ui::Notepad *ui;
    };
    
    
    class textEdit : public QTextEdit
    {
        Q_OBJECT
    
    public:
        textEdit(QWidget *parent);
    
    private slots:
    
        void mouseReleaseEvent(QMouseEvent *event);
    
    };
    
    #endif // NOTEPAD_H
    

    notepad.cpp

    #include "notepad.h"
    #include "ui_notepad.h"
    
    
    Notepad::Notepad(QWidget *parent) :
        QMainWindow(parent),
        ui(new Ui::Notepad)
    {
        ui->setupUi(this);
    }
    
    Notepad::~Notepad()
    {
        delete ui;
    }
    
    
    void Notepad::on_quitButton_clicked()
    {
        qApp->quit();
    
    }
    
    textEdit::textEdit(QWidget *parent) :
        QTextEdit(parent){}
    
    void textEdit::mouseReleaseEvent(QMouseEvent *event)
    {
        copy();
    }
    

    main.cpp

    #include "notepad.h"
    #include <QApplication>
    
    int main(int argc, char *argv[])
    {
        QApplication a(argc, argv);
        Notepad w;
        w.show();
        textEdit txt(&w);
        txt.show();
    
        return a.exec();
    }
    

  • Lifetime Qt Champion

    Hi,

    You can can use an event filter. More details there

    Hope it helps



  • @SGaist I don't understand. What am I connecting the filter to? Notepad? It seems like I would need to check what widget the event is from. This leaves me with the same problem... I just need to know how to define the class that already exists in the .ui file.



  • The solution is to right click on the textEdit and then choose Promote.
    I named the promoted class as qText and created the following files.

    qtext.h

    #define QTEXT_H
    
    #include <QTextEdit>
    
    class qText : public QTextEdit
    {
        Q_OBJECT
    
    public:
    
        explicit qText(QWidget *parent);
    
    private slots:
    
        void mouseReleaseEvent(QMouseEvent *event);
    
    };
    
    #endif // QTEXT_H
    

    qtext.cpp

    #include "qtext.h"
    
    qText::qText(QWidget *parent) :
        QTextEdit(parent) {}
    
    void qText::mouseReleaseEvent(QMouseEvent *event)
    {
        copy();
        QTextEdit::mouseReleaseEvent(event);
    }
    

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