qdialog | 易学教程

How do I prevent the enter key from closing my QDialog (Qt 4.8.1)

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问题 I have a QDialog with a QDialogButtonBox . The OK and Cancel buttons are active. Occasionally I disable or hide the OK button based on the state of my dialog. It seems, no matter what I do, the Enter key always activates the OK button. I really DON'T want this to happen. I have tried: Setting default and autoDefault properties to false every time I show/hide/enable/disable/whatever the button installing an event filter on the OK button to intercept key events (pressed and released) for return

How do I prevent the enter key from closing my QDialog (Qt 4.8.1)

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Fullscreen for QDialog from within MainWindow only working sometimes

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问题 (Testing with C++ on Qt 4.8 and Ubuntu 12.10 unity) I've got a main window which displays a QDialog. When I put the Dialog window full-screen it does not seem to always work even though it seems to be a proper window. Meaning, the window can appear full-screen, though only sometimes. Anyone got an idea? I know Qt states it might not work for all X environments, but it can't be that bad, can it? MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi

Resize QDialog at a runtime

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问题 I have a QDialog subclass containing some options of my application. Some of the options are core, the other are advanced, so I decided to put them into separeted checkable QGroupBox. I want my dialog to shrink verticaly when the user checked off advanced options box, but I can't find the way to do it properly - the dialog size stays exactle the same I set dialog's size policy to Expanding , tried to call adjustSize() and tried to call resize() method - nothing helps. I can't resize

How to prevent member QWidgets or QDialog objects taking over key events from QMainWindow once the dialog has been clicked by the mouse?

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问题 So I have QMainWindow type class which described by the following code: class MainWindow : public QMainWindow { Q_OBJECT public: explicit MainWindow(QWidget *parent = 0); ~MainWindow(); private: void closeEvent(QCloseEvent *);\ DimensionDialog *newResolution; Ui::MainWindow *ui; ImageInteraction *liveVideo; ImageInteraction *modifiedVideo; CameraControl *cameraControl; QPushButton *pushToTalk; QPushButton *audioSettingsSetup; AudioSettings *audioSettings; QPushButton *numberOfRunningThreads;

How to make a dialog window always on the front at my application level

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问题 How can I make a Qt dialog window always on top at my application level? I want to make a dialog window always on the front but remember always on the front at my application level, even if I click on an empty place, I want to it stay on the front of my application only. I have tried to use setWindowFlags(Qt::WindowStaysOnTopHint) , but this makes the dialog window always on the top at the desktop level, but I want it to be on top at the my application level only. How can I do that? 回答1: You

Passing a variable to other dialog Qt

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问题 I have a QTreeView with a list of text files. If a file is selected and void FileList_dialog::on_openButton_released() it should pass a variable path to dialog textFile_dialog . Until now I've this: void FileList::on_openButton_released() { QModelIndex index = ui->treeView->currentIndex(); QFileSystemModel *model = (QFileSystemModel*)ui->treeView->model(); QString path = model->filePath(index); QString name = model->fileName(index); QString dir = path; QFile file(path); qDebug() << path;

How do I catch a pyqt closeEvent and minimize the dialog instead of exiting?

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问题 I have a QDialog object. When the user clicks on the X button or presses Ctrl+Q , I want the dialog to go to a minimized view or system tray icon, instead of closing. How do I do that? 回答1: A simple subclass that minimizes instead of closing is the following: class MyDialog(QtGui.QDialog): # ... def __init__(self, parent=None): super(MyDialog, self).__init__(parent) # when you want to destroy the dialog set this to True self._want_to_close = False def closeEvent(self, evnt): if self._want_to

QDialog not opening from Main window (pyQt)

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问题 I'm trying to launch a dialog by clicking a button in the main window: Here's the (qtdesigner generated) code which I modified just to test it .. I've set the showDial function to show the dial when the button is clicked. But it doesn't work : from PyQt4 import QtCore, QtGui try: _fromUtf8 = QtCore.QString.fromUtf8 except AttributeError: _fromUtf8 = lambda s: s class Ui_Dialog(object): def setupUi(self, Dialog): Dialog.setObjectName(_fromUtf8("Dialog")) Dialog.setWindowModality(QtCore.Qt

QDialog exec() can not exit process

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int main(int argc, char *argv[]) { QApplication a(argc, argv); QDialog dlg; dlg.exec(); return a.exec(); } That's all my code, but when I close the window, The process isn't exit, it seems that drop in the loop a.exec() . Generally speaking, calling any exec is a bad idea, other than QCoreApplication::exec() or QDrag::exec() . The presence of exec() and waitForXxx() methods is an enticing trap for the unwary. Those methods are "easy" to use, but that ease comes at a price of hard to track bugs. Don't use them. You should simply show the dialog: int main(int argc, char *argv[]) { QApplication a