Custom Widget - clicked() signal

[ak]

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

[munna]

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.

[sarode]

Hello.

Here is the sample code to do that..




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




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


You can try this options here

Cheers

[wysota]

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

Based on the state value repaint the button as you need

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).