I have a QtWidgets application in which I need virtual keyboard in. Currently, I put it inside a QQuickWidget inside the app.
My problem is that sometimes, I dynamically need to add QWebEngineView widget, to play some video from web source. The problem is that Virtual keyboard leaves the QQuickWidget and jumps to the QWebEngineView.
When I delete (dynamically) this widget after being used, virtual keyboard doesn't return to the QQuickWidget again.
I tried to search a lot about what can be reason. but I cannot find anything
So, mainly the question is how to force Qt virtual keyboard to be in the QQuickWidget and not leave it?
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In my Qt application, I have couple of QtWidgets which are floating. I want to know when QtWidget is dragged to another screen So that I can resize content within according to new screen DPI.
Connect the primaryScreenChanged signal from your QGuiApplication to slots in your widgets.
Edited to add: On reflection, this probably doesn't do what you want -- it signals when the application changes screen, not the widget.
I'm programming in Python using Qt with PySide and I have custom QWidget defined in a file called editor.py which is inserted in my ui in windowUi.py using the promotion method in the Qt Designer.
The custom QWidget class defined in editor.py doesn't do much besides using Elixir to edit items in a sqlite3 database and importing a ui file (editor.ui). Inside editor.ui there are a couple of QLineEdits and QDateTime widgets.
This widget is originally hidden in the main window and showed when needed. So far so good, but the problem is that I cannot make it hide when not needed. I decided that the widget is not needed when the user clicks anywhere else in the main window that is not the editor widget imported, that is, focus shift from the QWidget.
I looked upon this question: QWidget focusOutEvent not received and realized that the QWidget is really not getting focus.
If I call setFocusPolicy(StrongFocus) on it then I can make it hide if, and only if, the user clicks on the QWidget background (not on any widget inside it) and then clicks outside.
The question is then, how can I make it such that when the user clicks outside of this widget, shifting focus from any QLineEdit or QDateTime that's inside it to something else, the QWidget then hides itself?
Doesn't QApplication:::focusChanged ( QWidget * old, QWidget * now ) do what you need? You can check if QWidget *now is one of your QLineEdits/QDateTime or not (f.e. by going up by the QObject::parent)
Simply connect to this signal before showing and disconnect after hiding.
I render Qt gui elements on my own 3d application screen by rendering Qt stuff to QImage and then drawing that on the screen. I redirect input to QGraphicsScene, but not everything works. Clicking buttons works fine while clicking QLineEdit or web page elements in QWebView doesnt. However doubleclick seems to work - doubleclicked QLineEdit would select some text, but still would not gain focus. What could be causing this?
I had the exact same problem. It seemed i had
QGraphicsView.keyPressEvent(self, keyEvent)
implemented in my graphicsView. Had to resend the event up the chain of inheritance.
I also implemented keyboard event sending. No matter how i send events (QGraphicsScene::keyPressEvent()/QGraphicsScene::keyReleaseEvent() or QApplication::sendEvent) text is not typed into control, even if some text is selected in QLineEdit (text should be overwritten, shouldnt it?). I suspect this is because of QLineEdit not gaining focus by clicking it, but i cant find out why it is not focused. All events are sent to my subclass of QGraphicsScene.
I use the last Qt version for a projet and QProcess. I want to lauch program from my application by using QProcess. I want to display a QGraphicsView transparent on full screen over the launched program.
For the moment: I hide the view, launch the program, sleep during 5 seconds and show the view. I want that my view keep the focus and stay on the top level? Is there any better way to do that? A custom setting for the QGraphicsView?
Create your QGraphicsView (or the window that contains it) with the Qt::WindowStaysOnTopHint flag
Once you run a program in QProcess, you have limited control over it. Qt does not provide details about other applications that are running, you won't know where the launched application is being displayed unless it tells you explicitly.
If you have access to the code of the application you're running, it is possible put a transparent overlay on top a given widget, or widgets, that could then record mouse clicks and other interactions. It's also possible to override events and record basic information about the application's use.
I'm working on implementing a virtual keyboard for a QtWebKit based browser. I'm having a lot of difficulty understanding how QtWebKit paints the controls within the actual page. Initially I thought they were QLineEdit instances, but they are not. Diving into implementation it appears that the glue code between Qt and WebKit paints the text field using QStyle and QPainter. Unfortunately, I'm very new to Qt and so I dont understand where in the event loop the mouse presses for these events are interpreted. I found Editor::canEdit() deep in the call stack, and now I can bring up the virtual keyboard when the user clicks on a text field within the page. The virtual keyboard then expected a pointer to a QWidget instance, but Edito::canEdit() doesn't carry that information and I can't find anywhere where a QWidget like instance is exposed. I'm really stumped, any advice would be most welcome.
Thanks!
You might get better luck by hooking the virtual keyboard into the Qt input method system. Search for "InputMethod" in the source code of QtWebKit Api, i.e. the qweb*.* files.