Unsolved How to do QPainter paint in the Widget?
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Hey guys,
I would like to paint in the Qt Widget of dialog.ui or mainwindow.ui. How can I set my paint canvas as where I want it to be?? Should I create a new h and cpp file for Widget and promote to it?
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hi
the mainwindow class
do have a paintevent you can override
but it often easier to use a plain Widget
with a
void MyWidget::paintEvent(QPaintEvent *)
{
QPainter painter(this);
....
}
function.
and YES, you then place a plain widget and promote it - to your widget.Other way is to use a QLabel and draw on a pixmap and then let it show that pixmap.
void MainForm::slot_buttonClick() { QPixmap pixmap(100,100); pixmap.fill(QColor("transparent")); QPainter painter(&pixmap); painter.setBrush(QBrush(Qt::black)); painter.drawRect(10, 10, 100, 100); ui->someQlabel->setPixmap(pixmap); }