qevent

问题 This question already has answers here : How to resize the QToolButton when focus is coming on that QToolButton (2 answers) Closed 6 years ago . I am implementing an application in which i am having 3 QToolButton and when the focus is coming on any QToolButton it should resize . One of my friend has given me answer but i am unable to figure it out as i am inheriting QMainWindow class as well in my mainWindow. He is telling to inherit QToolButton too. But multiple inheritance problem will

问题 This question already has answers here : How to resize the QToolButton when focus is coming on that QToolButton (2 answers) Closed 6 years ago . I am implementing an application in which i am having 3 QToolButton and when the focus is coming on any QToolButton it should resize . One of my friend has given me answer but i am unable to figure it out as i am inheriting QMainWindow class as well in my mainWindow. He is telling to inherit QToolButton too. But multiple inheritance problem will

问题 I'm developing an application on a small Embedding Linux device with Qt5.5. I need to be able to modify the mouse press coordinates received from Linux ( tslib ) in my application. I've tried implementing an event filter in my main view that modifies the mouse coordinate received, creates a new mouse event and submits the new event to the widget. However, in the widget's mousePressEvent function, I see the debug message only once, and it is for the original coordinates received, not my

问题 I am showing a image in qt label. Below is my code: void MyClass::onPushButtonClicked(QString myurl) { this->setCursor(Qt::WaitCursor); ui.qtImageLabel->clear(); qDebug()<<QTime::currentTime()<<"MyClass: onPushButtonClicked"; QNetworkAccessManager *qnam_push_button_clicked_show_image; QNetworkReply *reply; QNetworkRequest request; request.setHeader( QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded" ); QUrl url(myurl); request.setUrl(url); qnam_push_button_clicked_show

问题 I am showing a image in qt label. Below is my code: void MyClass::onPushButtonClicked(QString myurl) { this->setCursor(Qt::WaitCursor); ui.qtImageLabel->clear(); qDebug()<<QTime::currentTime()<<"MyClass: onPushButtonClicked"; QNetworkAccessManager *qnam_push_button_clicked_show_image; QNetworkReply *reply; QNetworkRequest request; request.setHeader( QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded" ); QUrl url(myurl); request.setUrl(url); qnam_push_button_clicked_show

问题 I can't seem to catch QEvent::MouseMove typed events in my eventFilter. Here's my event filter: bool MapWidget_c::eventFilter( QObject *obj, QEvent *ev ) { if( obj == graphicsGeoMap_mp || obj == graphicsScene_mp || obj == graphicsView_mp ) { if( ev->type() == QEvent::MouseMove ) { QMouseEvent *mouseEvent = static_cast< QMouseEvent* >( ev ); mouseMoveEvent( mouseEvent ); return true; } else { return false; } } else { // pass the event on to the parent class return QWidget::eventFilter( obj, ev

问题 I have an event filter and I noticed when I click to expand/collapse a tree branch I get QEvent::MetaCall . I was thinking about using this to roll my own expand/collapse code, but I don't know how to get any information, such as the index of the item. Is there anything available from this MetaCall event type? I found someone had asked this same question on another site, but without an answer, here: http://www.qtcentre.org/threads/37525-How-to-filter-QEvent-MetaCall What is this event

问题 I have an owner-drawn QWidget inside a QScrollArea , so when painting, and I want to paint only the parts that are visible. To do so, I need to have the rectangle of the visible area of the QPainter . The only candidates were QPainter::viewport() , QPainter::window() , and QPainter::clipBoundingRect() , so I put this code to log their output: setMinimumHeight(3000); setMinimumWidth(3000); } void MyWidget::paintEvent(QPaintEvent *) { QPainter painter(this); qDebug() << painter.viewport() <<

问题 I have a situation where I would like to pass a QML event to another QML item in the middle of the initial event handler. e.g. Item { id: item1 Keys.onPressed: { // Pre-process... passEventToObject(event, item2); // Post-process based on results of event passing... } } TextInput { id: item2 // Expect key press event to be handled by text input } What can I do to acheive passEventToObject ? Notes: I don't have access to modify Keys.onPressed inside item2 , it's a QML built-in ( TextInput ).

问题 Background Hi guys. I've made a custom widget with QLineEdit and several QPushButtons to use it with custom item delegate: class LineEditor : public QWidget { public: explicit LineEditor(QWidget *parent = 0) : QWidget(parent) { setLayout(new QHBoxLayout); layout()->setContentsMargins(0, 0, 0, 0); layout()->setSpacing(0); QLineEdit *edit = new QLineEdit(this); layout()->addWidget(edit); layout()->addWidget(new QPushButton(this)); layout()->addWidget(new QPushButton(this)); setFocusProxy(edit);