How to link signal of QColorDiaglog to a slot.

[summit]

This is my code where i am opening a QColor diaglog.

I want to reflect the change of color in realtime so want to link the colorChanged signal to a function.

How can i link currentColorChanged(const QColor &color) of QDiaglog to slot ParamChangeCurrentKeyColor.

void Sum_ChromaKey::ParamChangeKeyColor()
{
	QColor color;
	int r, g, b;
	color = QColorDialog::getColor();  // link  currentColorChanged signal to  ParamChangeCurrentKeyColor
	color.getRgb(&r, &g, &b);
	_KeyColor.r = r;
	_KeyColor.g = g;
	_KeyColor.b = b;

	// currentColorChanged(const QColor &color)

}


void Sum_ChromaKey::ParamChangeCurrentKeyColor(const QColor &color)
{
	_KeyColor.r = color.red;
	_KeyColor.g = color.green;
	_KeyColor.b = color.blue;
}

[mrjj]

Hi

you need to create your own instance in connect to that

QColorDialog col;
connect(&col, &QColorDialog::currentColorChanged,this, &Sum_ChromaKey::ParamChangeCurrentKeyColor);
col.exec();

[summit]

@mrjj col.exec() would be a blocking function , can i do it with a non blocking function.

[mrjj]

@summit
Hi
Call open instead and then you need to use a pointer

        QColorDialog * col = new QColorDialog();
        col->setAttribute(Qt::WA_DeleteOnClose); // this deletes it when closed
        connect(col, &QColorDialog::currentColorChanged,this, &MainWindow::ParamChangeCurrentKeyColor);
        col->open();

[summit]

@mrjj Thank you very much for your kind help.

[mrjj]

@summit
You are most welcome.
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