How do you handle the user error message event class?

August 23, 2020 by Steven Colson

 

Contents

You should read these troubleshooting guidelines if you get an error in the user error message event class. Event class data for the user's error message. The name of the client application connected to the instance of SQL Server. This column contains the values ​​passed by the application, not the display name of the program.

 

 

Member Function Documentation

QMessageBox :: QMessageBox (QMessageBox :: Symbol-Symbol, Const QString & Title, Const QString & Text, QMessageBox :: StandardButtons-Buttons = NoButton, QWidget * Parent = Nullptr , Qt :: WindowFlags F = Qt :: Dialog | Qt :: MSWindowsFixedSizeDialogHint)

Creates a message box with the specified icons, titles, text, and standard buttons. Standard or custom buttons can be added at any time using addButton (). The parent and f arguments are passed to the QDialog constructor.

If the macOS parent is not nullptr and you want your message box to appear as that parent's Qt :: Sheet, set the message box modality to Qt:: WindowModal (default). Otherwise, the message box is a standard dialog box.

QMessageBox :: QMessageBox (QWidget * Parent = Nullptr)

On macOS, if you want your message box to appear as the Qt :: Sheet of the parent box, set the box modality of the message box to Qt :: WindowModal or use open (). Otherwise, the message box is a standard dialog box.

[signal] Void QMessageBox :: ButtonClicked (QAbstractButton * Button)


user error message event class

This signal is emitted when a button is pressed in the QMessageBox. The pressed button returned to the button.

[overwrite Virtual Location] Int QMessageBox :: Exec ()

If you are using a QMessageBox with standard buttons, this function returns a StandardButton value that indicates the standard button that the user pressed. If you are using a QMessageBox with custom buttons, this function will return an opaque value. Use clickedButton () to determine which button the user clicked.

Users cannot interact with other windows in the same application until they close the dialog by clicking a button or using the mechanism provided by the window system.

[virtual] QMessageBox :: ~ QMessageBox ()

[static] Void QMessageBox :: About (QWidget * Parent, Const QString & Title, Const QString & Text)

In the information window there is one button labeled "OK". On macOS, the About box appears as a window without a template. It is currently a modal application on other platforms.

[static] Void QMessageBox :: AboutQt (QWidget * Parent, Const QString & Title = QString ())

Displays a simple Qt message box with the specified title and is centered on the parent (unless the parent is nullptr ). The message contains the version number of Qt the application is using.

Invalidate QMessageBox :: AddButton (QAbstractButton Key *, QMessageBox :: ButtonRole Role)

QPushButton * QMessageBox :: AddButton (const QString & Text, Role QMessageBox :: ButtonRole)

QPushButton * QMessageBox :: AddButton (QMessageBox :: StandardButton Button)

QAbstractButton * QMessageBox :: Button (QMessageBox :: StandardButton Which) Const



Returns the pointer corresponding to the default button, or nullptr if the default button does not exist in this message box.

QMessageBox :: ButtonRole QMessageBox :: ButtonRole (QAbstractButton * Button) Const

Returns the button role for the specified button. This function returns InvalidRole if the button is nullptr or has not been added to the message box.

QList QMessageBox :: Button () Const

[virtual Secure Overwrite] Void QMessageBox :: ChangeEvent (QEvent * Ev)

QCheckBox * QMessageBox :: CheckBox () Const

QAbstractButton * QMessageBox :: ClickedButton () Const

Returns the button that the user clicked, or nullptr if the user pressed the Esc key and the exit button was not defined.

[virtual Secure Overwrite] Void QMessageBox :: CloseEvent (QCloseEvent * E)

[static] QMessageBox :: StandardButton QMessageBox :: Critical (QWidget * Parent, Const QString & Title, Const QString & Text, QMessageBox :: StandardButtons- Buttons = Ok, QMessageBox :: StandardButton DefaultButton = NoButton)

The default buttons are added to the message box. defaultButton specifies the button to use when the Enter key is pressed. defaultButton must refer to the button specified in the buttons. If defaultButton is QMessageBox :: NoButton, QMessageBox automatically selects the appropriate standard.

Warning: do not delete parents while dialog is running. If you want to do this, you must create the dialog yourself using one of the QMessageBox constructors.

QPushButton * QMessageBox :: DefaultButton () Const

QAbstractButton * QMessageBox :: EscapeButton () Const

[virtual Protected Overwrite] Bool QMessageBox :: Event (QEvent * E)

[static] QMessageBox :: StandardButton QMessageBox :: Information (QWidget * Parent, Const QString & Title, Const QString & Text, QMessageBox :: StandardButtons- Buttons = Ok, QMessageBox :: StandardButton DefaultButton = NoButton)

The default buttons are added to the message box. defaultButton specifies the button to use when the Enter key is pressed. defaultButton must refer to the button specified in the buttons. If defaultButton is QMessageBox :: NoButton, QMessageBox automatically selects the appropriate standard.

Warning: do not delete parents while dialog is running. If you want to do this, you must create the dialog yourself using one of the QMessageBox constructors.

[virtual Overwrite Protection] Void QMessageBox :: KeyPressEvent (QKeyEvent * E)

Void QMessageBox :: Open (QObject * Recipient, Const Char * Member)

Opens a dialog box and connects its completion signal () or buttonClicked () to the location specified by the receiver and member. If the place in the element has a pointer to its first parameter, the connection will be with buttonClicked (), otherwise the connection must be broken ().

[static] QMessageBox :: StandardButton QMessageBox :: Question (parent QWidget *, Const QString & Title, Const QString & Text, QMessageBox :: StandardButtons- Buttons = Standard Buttons (Yes | No), QMessageBox :: StandardButton DefaultButton = NoButton)



The default buttons are added to the message box. defaultButton specifies the button to use when the Enter key is pressed. defaultButton must refer to the button specified in the buttons. If defaultButton is QMessageBox :: NoButton, QMessageBox automatically selects the appropriate standard.

Warning: do not delete parents while dialog is running. If you want to do this, you must create the dialog yourself using one of the QMessageBox constructors.

Void QMessageBox :: RemoveButton (QAbstractButton Button *)

[virtual Secure Overwrite] Void QMessageBox :: ResizeEvent (QResizeEvent * Event)

Void QMessageBox :: SetCheckBox (QCheckBox * Cb)



Activates the cb flag in the message dialog. The message box takes ownership of the checkbox. The cb argument can be nullptr to remove an existing checkbox from the message box.

Void QMessageBox :: SetDefaultButton (QPushButton * Button)

Void QMessageBox :: SetDefaultButton (QMessageBox :: StandardButton Button)

Void QMessageBox :: SetEscapeButton (QAbstractButton Button *)

Void QMessageBox :: SetEscapeButton (QMessageBox :: StandardButton Button)

Void QMessageBox :: SetWindowModality (Qt :: WindowModality WindowModality)



On macOS, if the modality is set to Qt :: WindowModal and the message box is parent, the message box is Qt :: Sheet, otherwise the message box is a standard dialog box.

Void QMessageBox :: SetWindowTitle (const QString & Title)

Set the title of the message box to title. The window title is ignored on macOS (as prescribed in the macOS directives).

[virtual Secure Overwrite] Void QMessageBox :: ShowEvent (QShowEvent * E)

QMessageBox :: StandardButton QMessageBox :: StandardButton (QAbstractButton Button *) Const

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