Custom Widget - clicked() signal

What shoud i do to create clicked() signal in my custom widget?

You can have a boolean variable which will become true in mousePressEvent. In mouseReleaseEvent you can emit the signal clicked() if the boolean is true and then reset it again for the next click.

Hello.

Here is the sample code to do that..

Code:

---

class Button : public QWidget
{
       Q_OBJECT
 
       public:
            Button(....);
 
       protected:
            void mousePressEvent(QMouseEvent*);
            void mouseReleaseEvent(QMouseEvent*);
            void paintEvent(QPaintEvent*);
 
      private:
             bool state;
 
      signals:
             void clicked();
             void release();
             void pressed();
};
 
Button::Button(............)
{
     state = 0;
}
 
void Button::mousePressEvent(....)
{
         state = 1;
         repaint();
         emit pressed();
}
 
void Button::mouseReleaseEvent(....)
{
         state = 0;
         repaint();
         emit released();
         emit clicked();
}
 
void Button::paintEvent(....)
{
         if(state)
                  ...............
         else
                  .............;
}

---

.

Based on the state value repaint the button as you need and call the signal with any object like this

Code:

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Button *b = new Button(0);
connect(b, SIGNAL(clicked()), qApp, SLOT(quit()));

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You can try this options here

Cheers

Quote:

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Originally Posted by sarode

Code:

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void Button::mouseReleaseEvent(....)
{
         state = 0;
         repaint();
         emit released();
         emit clicked();
}

---

.

Based on the state value repaint the button as you need

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It's better to update() than to repaint(), repaint() calls are not merged which may slow down the application a bit (or much, depending on how complex is the painting routine).