qwidget

问题 I would like to develop a system-wide onscreen keyboard in Qt/QML. Injecting key-events via xlib works fine. My problem now: If a keyboard-button is clicked, the window with the selected input field will lose the focus. In consequence, the key event will not be delivered to the previously selected input field. So does anybody know how to prevent a QWidget from beeing activated/focussed by mouse-clicks? Every hint is welcome and a code examples would be great! Thank you very much in advance,

问题 I would like to develop a system-wide onscreen keyboard in Qt/QML. Injecting key-events via xlib works fine. My problem now: If a keyboard-button is clicked, the window with the selected input field will lose the focus. In consequence, the key event will not be delivered to the previously selected input field. So does anybody know how to prevent a QWidget from beeing activated/focussed by mouse-clicks? Every hint is welcome and a code examples would be great! Thank you very much in advance,

问题 I've created an UI with qt Creator,in this UI there is just a button and a widget (let's call it respectively button and char_container); I need to add a chartview programmatically inside the chart_container. I didn't change the default layout. I've tried the following code,but it does not work: void MainWindow::button_slot(){ QtCharts::QChart *chart = new QtCharts::QChart(); QtCharts::QChartView *chartView = new QtCharts::QChartView(chart); chartView->setParent(ui->chart_container); this

问题 I'm writing a little Qt application with Python. I've created QMainWindow, which have a QGridLayout. In each grid I'm adding QTextBrowser Widget. I want left side of my grid to be not bigger than 25% of window. So I'll have two QTextBrowsers: one is 25% of window's width, and another is 75% of window's width. How can I do it? Thanks! 回答1: You can specify relative width by giving each cell a stretch with setStretch(). They will get sizes proportional to the given stretches. Here is a simple

问题 I am working on Qt application. There I am creating layout and adding sublayout. I have seen that calling addLayout() sets as parent the container layout. Does that implies than when I delete superlayout its descendants will get deleted too? QWidget* centralWidget = new QWidget(this); QVBoxLayout *mainLayout = new QVBoxLayout(centralWidget); QFormLayout *formLayout = new QFormLayout; mainLayout->addLayout(formLayout); Will deleting centralWidget delete formLayout? Thanks and regards 回答1:

问题 I am making an IDE in python and I've had some trouble adding text to my tabs. Adding the title works but adding the text inside of it doesn't. Here is my code: import sys import sys from subprocess import PIPE, Popen import json from pyautogui import hotkey from PyQt5 import QtGui, QtPrintSupport from PyQt5.QtCore import QRect, QRegExp, Qt from PyQt5.QtGui import (QColor, QFont, QPainter, QSyntaxHighlighter, QTextCharFormat, QTextCursor) from PyQt5.QtWidgets import (QAction, QApplication,

问题 I am making an IDE in python and I've had some trouble adding text to my tabs. Adding the title works but adding the text inside of it doesn't. Here is my code: import sys import sys from subprocess import PIPE, Popen import json from pyautogui import hotkey from PyQt5 import QtGui, QtPrintSupport from PyQt5.QtCore import QRect, QRegExp, Qt from PyQt5.QtGui import (QColor, QFont, QPainter, QSyntaxHighlighter, QTextCharFormat, QTextCursor) from PyQt5.QtWidgets import (QAction, QApplication,

问题 I am making an IDE in python and I've had some trouble adding text to my tabs. Adding the title works but adding the text inside of it doesn't. Here is my code: import sys import sys from subprocess import PIPE, Popen import json from pyautogui import hotkey from PyQt5 import QtGui, QtPrintSupport from PyQt5.QtCore import QRect, QRegExp, Qt from PyQt5.QtGui import (QColor, QFont, QPainter, QSyntaxHighlighter, QTextCharFormat, QTextCursor) from PyQt5.QtWidgets import (QAction, QApplication,

问题 I have a QWidget with a QGraphicsView and a push button. The QGraphicsView has to take mouse press and release events to detect a swipe .At the same time push button should run a small function on clicked. I used an event filter in the QWidget to detect the mouse events. bool Widget::eventFilter(QObject * obj, QEvent * event) { // Capturing keyboard events for moving if( event->type() == QEvent::KeyPress ) { //Do something } //Capturing mouse events for swipe else if( event->type() == QEvent:

问题 I have a QWidget with a QGraphicsView and a push button. The QGraphicsView has to take mouse press and release events to detect a swipe .At the same time push button should run a small function on clicked. I used an event filter in the QWidget to detect the mouse events. bool Widget::eventFilter(QObject * obj, QEvent * event) { // Capturing keyboard events for moving if( event->type() == QEvent::KeyPress ) { //Do something } //Capturing mouse events for swipe else if( event->type() == QEvent: