I do not understand why you pass QMouseEvent to the parent constructor, you must pass the parent attribute as shown below: class QLabel_alterada(QLabel): clicked=pyqtSignal() def mousePressEvent(self, ev): self.clicked.emit() To avoid having problems with imports we can directly promote the widget as shown below: We place a QLabel and right click and choose Promote to …: … Read more
In order to change the label size you can select an appropriate size policy for the label like expanding or minimum expanding. You can scale the pixmap by keeping its aspect ratio every time it changes: QPixmap p; // load pixmap // get label dimensions int w = label->width(); int h = label->height(); // set … Read more
Widgets when they are visible for the first time call to be visible to their children, but since you are creating it afterwards they probably are not calling that method, a possible solution is to call the show method. void ChatWidget::displayChatAfterButtonPressed() { QLabel *lbl; lbl=new QLabel(this); lbl->setText(“Hello World 2”); lbl->show(); } comment: it seems strange … Read more