The QKeyEvent class, part of the Qt framework, describes a key event.
Questions tagged [qkeyevent]
73 questions
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Qt keyPressEvent Error
I wrote this piece of code, but I get this error:
"left of '->key' must point to class/struct/union/generic type".
Considering that GUI is a class derived from the QWidget class, how can I properly catch the pressing of a key?
void…

Ana
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Propagate keyEvent from widget to QKeySequenceEdit
I have a QTreeWidget and QKeySequenceEdit and I want pressing shortcuts in QTreeWidget lead to editing shortcut in QKeySequenceEdit. I've installed eventFilter and constructed the corresponding QShortcut using this solution:
How can I capture…

Bearded Beaver
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QKeyEvent isAutoRepeat not working?
So, I have an application where if a particular button is kept pressed it plays an audio device, when the button is released it stops the audio device. I use keyPressEvent and KeyReleaseEvent to implement this which is similar to the code…

the_naive
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Selective keyPressEvent, filter for its sender QLineEdit
I've created a QWidget, which contains three QLineEdits. Then I added a overwrote the keyPressEvent so that this lineEdit_3 reacts on key press. Working good.
void MySuperWidget::keyPressEvent(QKeyEvent* keyEv)
{
switch (keyEv->key()) {
case…

Ralf Wickum
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symbol lookup error: /usr/lib64/qt5/plugins/platforms/libqxcb.so: undefined symbol: xkb_state_key_get_utf8
while migrating my application from Qt4.7 to qt5.3
i made all the changes needed in the code according to qt5
my applications started but when i tried to login.. the application closed and it did not crashed rather
it stoped with this error
…

Deepti
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Move an item in a scene Qt
I try to move an item in a scene and for that, I use QKeypressEvent and moveBy that works both perfectly but I'd like to recover the "key press event", so I decided first, to use a boolean that returns true when the key is pressed and false when…

Ary
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Qt embedded processes not all keys
I use Qt Embedded and I have a board with some keypad. I use eventFilter and check for QKeyEvent for my widget, but for only two buttons Qt doesn't react to. eventFilter isn't called. Here is code:
bool eventFilter(QObject* parent, QEvent* event)
{
…

Bikineev
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Permanently disable shift in Qt when the GUI is running?
I'm using a QTableView where I show a list of Icons, the user can select some icons with mouse and control key button, and I'm able to handle these selections. But I want to disable the use of shift+left mouse key over the QTableView.
Is there any…

the_naive
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How to merge KeyReleaseEvent with Button
How to merge KeyReleaseEvent and QPushButton using signal.
I mean whenever user will press enter key button should call some function using SLOT. So what i have to use in the signal?
void mywindow::keyReleaseEvent(QKeyEvent *event)
{
…

Suresh
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how to hinder the short waiting time while pushing a button?
I made a program which moves an QGraphicsPixmapItem with QKeyPressEvent(I am using ASDW to move the item) and my problem is when I push the button without releasing my item does not move smoothly. Just like writing AAAAAAAAAAAAAAA without releasing…

bcdurak
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Qt - How to Use Key Pressed Event for a LineEdit which accepts only the Integers
I'm a new bie to Qt C++.. I have a QLineEdit. In which i have to Enter only the integers. If i press an Alphabet or any any other character my QLineEdit should not accept it. How to do this in qt with C++? Please Help To solve this.

New Moon
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VNC: Translate Qt KeyEvent to usable X11/RFB keysym
Background: I am currently in the process of creating a simple VNC viewer embedded in a QWidget for use on Windows. For this, I compiled the Qt-only VNC version of KRDC (remote desktop viewer for KDE) as well as its dependency libvncclient on…

Ancurio
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In a QWizard, the next button cannot accept key press event, but accepts mouse press event?
I have a class inherits QWizard, and add 2 independent QWizardPage(s). Before go to the next page, I want to do some job (i.e. check internet connection) on the first page. User may click 'next' button by mouse, or directly press enter/return by…

Royt
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