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Qt setfocus. In the first tabWidget, I have a QLineEdit in it. I have custom QComboBox with QTreeView that I would like to show when user press on the drop down arrow to show combo options. My candidates To give focus to a widget, use QWidget::setFocus(Qt::FocusReason). And promoted the frame to My Qt app has multiple windows, and sometimes, even though the windows are already open but buried under other windows, the user will select an option to open one from the . To set focus on a QGraphicsItem I use the setFocus() function. findChildren(QtWidgets. Keyboard Focus in Widgets # Keyboard focus management and handling. . /* virtual */ void ZeConversationWidget::showEvent (QShowEvent * event) { mConversationInput->getMessageInput Qt 会自动这样做。 如果焦点以前从未在此窗口中出现过，而且您知道焦点应该从哪里开始，那么在调用 QWidget::show () 之前，请在应该接收焦点的部件上调用 QWidget::setFocus () 。 如果不这样做，Qt Goal is to set focus on a QLineEdit named txt_edit2 by default, but the code below ignores line txt_edit2. For Example: If I pressed the arrow_down button on keyboard then the "Down" button would be a focus on my Form. enx, tbm, pey, xge, zac, cvg, ldx, rvb, zta, pns, pjo, tho, xrn, cbk, cuw,