The QMessageBox class provides a modal dialog with a short message, an icon, and some buttons.. Más...

#include <qmessagebox.h>

Diagrama de herencias de QMessageBox

Tipos públicos
enum	Icon { NoIcon = 0, Information = 1, Warning = 2, Critical = 3, Question = 4, NoIcon = 0, Information = 1, Warning = 2, Critical = 3, Question = 4 }
enum	{ NoButton = 0, Ok = 1, Cancel = 2, Yes = 3, No = 4, Abort = 5, Retry = 6, Ignore = 7, YesAll = 8, NoAll = 9, ButtonMask = 0xff, Default = 0x100, Escape = 0x200, FlagMask = 0x300 }
enum	Icon { NoIcon = 0, Information = 1, Warning = 2, Critical = 3, Question = 4, NoIcon = 0, Information = 1, Warning = 2, Critical = 3, Question = 4 }
enum	{ NoButton = 0, Ok = 1, Cancel = 2, Yes = 3, No = 4, Abort = 5, Retry = 6, Ignore = 7, YesAll = 8, NoAll = 9, ButtonMask = 0xff, Default = 0x100, Escape = 0x200, FlagMask = 0x300 }
Métodos públicos
	QMessageBox (QWidget parent=0, const char name=0)
	QMessageBox (const QString &caption, const QString &text, Icon icon, int button0, int button1, int button2, QWidget parent=0, const char name=0, bool modal=TRUE, WFlags f=WStyle_DialogBorder)
	~QMessageBox ()
QString	text () const
void	setText (const QString &)
Icon	icon () const
void	setIcon (Icon)
void	setIcon (const QPixmap &)
const QPixmap *	iconPixmap () const
void	setIconPixmap (const QPixmap &)
QString	buttonText (int button) const
void	setButtonText (int button, const QString &)
void	adjustSize ()
TextFormat	textFormat () const
void	setTextFormat (TextFormat)
	QMessageBox (QWidget parent=0, const char name=0)
	QMessageBox (const QString &caption, const QString &text, Icon icon, int button0, int button1, int button2, QWidget parent=0, const char name=0, bool modal=TRUE, WFlags f=WStyle_DialogBorder)
	~QMessageBox ()
QString	text () const
void	setText (const QString &)
Icon	icon () const
void	setIcon (Icon)
void	setIcon (const QPixmap &)
const QPixmap *	iconPixmap () const
void	setIconPixmap (const QPixmap &)
QString	buttonText (int button) const
void	setButtonText (int button, const QString &)
void	adjustSize ()
TextFormat	textFormat () const
void	setTextFormat (TextFormat)
Métodos públicos estáticos
static int	information (QWidget *parent, const QString &caption, const QString &text, int button0, int button1=0, int button2=0)
static int	information (QWidget *parent, const QString &caption, const QString &text, const QString &button0Text=QString::null, const QString &button1Text=QString::null, const QString &button2Text=QString::null, int defaultButtonNumber=0, int escapeButtonNumber=-1)
static int	question (QWidget *parent, const QString &caption, const QString &text, int button0, int button1=0, int button2=0)
static int	question (QWidget *parent, const QString &caption, const QString &text, const QString &button0Text=QString::null, const QString &button1Text=QString::null, const QString &button2Text=QString::null, int defaultButtonNumber=0, int escapeButtonNumber=-1)
static int	warning (QWidget *parent, const QString &caption, const QString &text, int button0, int button1, int button2=0)
static int	warning (QWidget *parent, const QString &caption, const QString &text, const QString &button0Text=QString::null, const QString &button1Text=QString::null, const QString &button2Text=QString::null, int defaultButtonNumber=0, int escapeButtonNumber=-1)
static int	critical (QWidget *parent, const QString &caption, const QString &text, int button0, int button1, int button2=0)
static int	critical (QWidget *parent, const QString &caption, const QString &text, const QString &button0Text=QString::null, const QString &button1Text=QString::null, const QString &button2Text=QString::null, int defaultButtonNumber=0, int escapeButtonNumber=-1)
static void	about (QWidget *parent, const QString &caption, const QString &text)
static void	aboutQt (QWidget *parent, const QString &caption=QString::null)
static int	message (const QString &caption, const QString &text, const QString &buttonText=QString::null, QWidget parent=0, const char =0)
static bool	query (const QString &caption, const QString &text, const QString &yesButtonText=QString::null, const QString &noButtonText=QString::null, QWidget parent=0, const char =0)
static QPixmap	standardIcon (Icon icon, GUIStyle)
static QPixmap	standardIcon (Icon icon)
static int	information (QWidget *parent, const QString &caption, const QString &text, int button0, int button1=0, int button2=0)
static int	information (QWidget *parent, const QString &caption, const QString &text, const QString &button0Text=QString::null, const QString &button1Text=QString::null, const QString &button2Text=QString::null, int defaultButtonNumber=0, int escapeButtonNumber=-1)
static int	question (QWidget *parent, const QString &caption, const QString &text, int button0, int button1=0, int button2=0)
static int	question (QWidget *parent, const QString &caption, const QString &text, const QString &button0Text=QString::null, const QString &button1Text=QString::null, const QString &button2Text=QString::null, int defaultButtonNumber=0, int escapeButtonNumber=-1)
static int	warning (QWidget *parent, const QString &caption, const QString &text, int button0, int button1, int button2=0)
static int	warning (QWidget *parent, const QString &caption, const QString &text, const QString &button0Text=QString::null, const QString &button1Text=QString::null, const QString &button2Text=QString::null, int defaultButtonNumber=0, int escapeButtonNumber=-1)
static int	critical (QWidget *parent, const QString &caption, const QString &text, int button0, int button1, int button2=0)
static int	critical (QWidget *parent, const QString &caption, const QString &text, const QString &button0Text=QString::null, const QString &button1Text=QString::null, const QString &button2Text=QString::null, int defaultButtonNumber=0, int escapeButtonNumber=-1)
static void	about (QWidget *parent, const QString &caption, const QString &text)
static void	aboutQt (QWidget *parent, const QString &caption=QString::null)
static int	message (const QString &caption, const QString &text, const QString &buttonText=QString::null, QWidget parent=0, const char =0)
static bool	query (const QString &caption, const QString &text, const QString &yesButtonText=QString::null, const QString &noButtonText=QString::null, QWidget parent=0, const char =0)
static QPixmap	standardIcon (Icon icon, GUIStyle)
static QPixmap	standardIcon (Icon icon)
Métodos protegidos
void	resizeEvent (QResizeEvent *)
void	showEvent (QShowEvent *)
void	closeEvent (QCloseEvent *)
void	keyPressEvent (QKeyEvent *)
void	styleChanged (QStyle &)
void	resizeEvent (QResizeEvent *)
void	showEvent (QShowEvent *)
void	closeEvent (QCloseEvent *)
void	keyPressEvent (QKeyEvent *)
void	styleChanged (QStyle &)
Propiedades
QString	text
	the message box text to be displayed.
Icon	icon
	the message box's icon
QPixmap	iconPixmap
	the current icon
TextFormat	textFormat
	the format of the text displayed by the message box

Descripción detallada

The QMessageBox class provides a modal dialog with a short message, an icon, and some buttons.

.

Message boxes are used to provide informative messages and to ask simple questions.

QMessageBox provides a range of different messages, arranged roughly along two axes: severity and complexity.

Severity is qmessagebox-quest.png Question For message boxes that ask a question as part of normal operation. Some style guides recommend using Information for this purpose. qmessagebox-info.png Information For message boxes that are part of normal operation. qmessagebox-warn.png Warning For message boxes that tell the user about unusual errors. qmessagebox-crit.png Critical For message boxes that tell the user about critical errors.

The message box has a different icon for each of the severity levels.

Complexity is one button (OK) for simple messages, or two or even three buttons for questions.

There are static functions for the most common cases.

Examples:

If a program is unable to find a supporting file, but can do perfectly well without it:

    QMessageBox::information( this, "Application name",
    "Unable to find the user preferences file.\n"
    "The factory default will be used instead." );

question() is useful for simple yes/no questions:

    if ( QFile::exists( filename ) &&
        QMessageBox::question(
            this,
            tr("Overwrite File? -- Application Name"),
            tr("A file called %1 already exists."
                "Do you want to overwrite it?")
                .arg( filename ),
            tr("&Yes"), tr("&No"),
            QString::null, 0, 1 ) )
        return false;

warning() can be used to tell the user about unusual errors, or errors which can't be easily fixed:

    switch( QMessageBox::warning( this, "Application name",
        "Could not connect to the <mumble> server.\n"
        "This program can't function correctly "
        "without the server.\n\n",
        "Retry",
        "Quit", 0, 0, 1 ) ) {
    case 0: // The user clicked the Retry again button or pressed Enter
        // try again
        break;
    case 1: // The user clicked the Quit or pressed Escape
        // exit
        break;
    }

The text part of all message box messages can be either rich text or plain text. If you specify a rich text formatted string, it will be rendered using the default stylesheet. See QStyleSheet::defaultSheet() for details. With certain strings that contain XML meta characters, the auto-rich text detection may fail, interpreting plain text incorrectly as rich text. In these rare cases, use QStyleSheet::convertFromPlainText() to convert your plain text string to a visually equivalent rich text string or set the text format explicitly with setTextFormat().

Note that the Microsoft Windows User Interface Guidelines recommend using the application name as the window's caption.

Below are more examples of how to use the static member functions. After these examples you will find an overview of the non-static member functions.

Exiting a program is part of its normal operation. If there is unsaved data the user probably should be asked if they want to save the data. For example:

    switch( QMessageBox::information( this, "Application name here",
        "The document contains unsaved changes\n"
        "Do you want to save the changes before exiting?",
        "&Save", "&Discard", "Cancel",
        0,      // Enter == button 0
        2 ) ) { // Escape == button 2
    case 0: // Save clicked or Alt+S pressed or Enter pressed.
        // save
        break;
    case 1: // Discard clicked or Alt+D pressed
        // don't save but exit
        break;
    case 2: // Cancel clicked or Escape pressed
        // don't exit
        break;
    }

The Escape button cancels the entire exit operation, and pressing Enter causes the changes to be saved before the exit occurs.

Disk full errors are unusual and they certainly can be hard to correct. This example uses predefined buttons instead of hard-coded button texts:

    switch( QMessageBox::warning( this, "Application name here",
        "Could not save the user preferences,\n"
        "because the disk is full. You can delete\n"
        "some files and press Retry, or you can\n"
        "abort the Save Preferences operation.",
        QMessageBox::Retry | QMessageBox::Default,
        QMessageBox::Abort | QMessageBox::Escape )) {
    case QMessageBox::Retry: // Retry clicked or Enter pressed
        // try again
        break;
    case QMessageBox::Abort: // Abort clicked or Escape pressed
        // abort
        break;
    }

The critical() function should be reserved for critical errors. In this example errorDetails is a QString or const char*, and QString is used to concatenate several strings:

    QMessageBox::critical( 0, "Application name here",
        QString("An internal error occurred. Please ") +
        "call technical support at 1234-56789 and report\n"+
        "these numbers:\n\n" + errorDetails +
        "\n\nApplication will now exit." );

In this example an OK button is displayed.

QMessageBox provides a very simple About box which displays an appropriate icon and the string you provide:

    QMessageBox::about( this, "About <Application>",
        "<Application> is a <one-paragraph blurb>\n\n"
        "Copyright 1991-2003 Such-and-such. "
        "<License words here.>\n\n"
        "For technical support, call 1234-56789 or see\n"
        "http://www.such-and-such.com/Application/\n" );

See about() for more information.

If you want your users to know that the application is built using Qt (so they know that you use high quality tools) you might like to add an "About Qt" menu option under the Help menu to invoke aboutQt().

If none of the standard message boxes is suitable, you can create a QMessageBox from scratch and use custom button texts:

    QMessageBox mb( "Application name here",
        "Saving the file will overwrite the original file on the disk.\n"
        "Do you really want to save?",
        QMessageBox::Information,
        QMessageBox::Yes | QMessageBox::Default,
        QMessageBox::No,
        QMessageBox::Cancel | QMessageBox::Escape );
    mb.setButtonText( QMessageBox::Yes, "Save" );
    mb.setButtonText( QMessageBox::No, "Discard" );
    switch( mb.exec() ) {
    case QMessageBox::Yes:
        // save and exit
        break;
    case QMessageBox::No:
        // exit without saving
        break;
    case QMessageBox::Cancel:
        // don't save and don't exit
        break;
    }

QMessageBox defines two enum types: Icon and an unnamed button type. Icon defines the Question, Information, Warning, and Critical icons for each GUI style. It is used by the constructor and by the static member functions question(), information(), warning() and critical(). A function called standardIcon() gives you access to the various icons.

The button types are: Ok - the default for single-button message boxes Cancel - note that this is not automatically Escape Yes No Abort Retry Ignore YesAll NoAll

Button types can be combined with two modifiers by using OR, '|': Default - makes pressing Enter equivalent to clicking this button. Normally used with Ok, Yes or similar. Escape - makes pressing Escape equivalent to clicking this button. Normally used with Abort, Cancel or similar.

The text(), icon() and iconPixmap() functions provide access to the current text and pixmap of the message box. The setText(), setIcon() and setIconPixmap() let you change it. The difference between setIcon() and setIconPixmap() is that the former accepts a QMessageBox::Icon and can be used to set standard icons, whereas the latter accepts a QPixmap and can be used to set custom icons.

setButtonText() and buttonText() provide access to the buttons.

QMessageBox has no signals or slots.

Ver también:: QDialog, Isys on error messages , GUI Design Handbook: Message Box

Documentación de las enumeraciones miembro de la clase

anonymous enum

Valores de enumeraciones:

NoButton
Ok
Cancel
Yes
No
Abort
Retry
Ignore
YesAll
NoAll
ButtonMask
Default
Escape
FlagMask

anonymous enum

Valores de enumeraciones:

NoButton
Ok
Cancel
Yes
No
Abort
Retry
Ignore
YesAll
NoAll
ButtonMask
Default
Escape
FlagMask

enum QMessageBox::Icon

Valores de enumeraciones:

NoIcon
Information
Warning
Critical
Question
NoIcon
Information
Warning
Critical
Question

enum QMessageBox::Icon

This enum has the following values:

NoIcon the message box does not have any icon.

Question an icon indicating that the message is asking a question.

Information an icon indicating that the message is nothing out of the ordinary.

Warning an icon indicating that the message is a warning, but can be dealt with.

Critical an icon indicating that the message represents a critical problem.

Valores de enumeraciones:

NoIcon
Information
Warning
Critical
Question
NoIcon
Information
Warning
Critical
Question

Documentación del constructor y destructor

QMessageBox::QMessageBox	(	QWidget *	parent = `0`,
		const char *	name = `0`
	)

Constructs a message box with no text and a button with the label "OK".

If parent is 0, the message box becomes an application-global modal dialog box. If parent is a widget, the message box becomes modal relative to parent.

The parent and name arguments are passed to the QDialog constructor.

QMessageBox::QMessageBox	(	const QString &	caption,
		const QString &	text,
		Icon	icon,
		int	button0,
		int	button1,
		int	button2,
		QWidget *	parent = `0`,
		const char *	name = `0`,
		bool	modal = `TRUE`,
		WFlags	f = `WStyle_DialogBorder`
	)

Constructs a message box with a caption, a text, an icon, and up to three buttons.

The icon must be one of the following: QMessageBox::NoIcon QMessageBox::Question QMessageBox::Information QMessageBox::Warning QMessageBox::Critical

Each button, button0, button1 and button2, can have one of the following values: QMessageBox::NoButton QMessageBox::Ok QMessageBox::Cancel QMessageBox::Yes QMessageBox::No QMessageBox::Abort QMessageBox::Retry QMessageBox::Ignore QMessageBox::YesAll QMessageBox::NoAll

Use QMessageBox::NoButton for the later parameters to have fewer than three buttons in your message box. If you don't specify any buttons at all, QMessageBox will provide an Ok button.

One of the buttons can be OR-ed with the QMessageBox::Default flag to make it the default button (clicked when Enter is pressed).

One of the buttons can be OR-ed with the QMessageBox::Escape flag to make it the cancel or close button (clicked when Escape is pressed).

Example:

    QMessageBox mb( "Application Name",
        "Hardware failure.\n\nDisk error detected\nDo you want to stop?",
        QMessageBox::Question,
        QMessageBox::Yes | QMessageBox::Default,
        QMessageBox::No  | QMessageBox::Escape,
        QMessageBox::NoButton );
    if ( mb.exec() == QMessageBox::No )
        // try again

If parent is 0, the message box becomes an application-global modal dialog box. If parent is a widget, the message box becomes modal relative to parent.

If modal is TRUE the message box is modal; otherwise it is modeless.

The parent, name, modal, and f arguments are passed to the QDialog constructor.

Ver también:: setCaption(), setText(), setIcon()

QMessageBox::~QMessageBox ( )

Destroys the message box.

QMessageBox::QMessageBox	(	QWidget *	parent = `0`,
		const char *	name = `0`
	)

QMessageBox::QMessageBox	(	const QString &	caption,
		const QString &	text,
		Icon	icon,
		int	button0,
		int	button1,
		int	button2,
		QWidget *	parent = `0`,
		const char *	name = `0`,
		bool	modal = `TRUE`,
		WFlags	f = `WStyle_DialogBorder`
	)

QMessageBox::~QMessageBox ( )

Documentación de las funciones miembro

void QMessageBox::about	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text
	)		`[static]`

Displays a simple about box with caption caption and text text. The about box's parent is parent.

about() looks for a suitable icon in four locations: 1 It prefers parent->icon() if that exists. If not, it tries the top-level widget containing parent. If that fails, it tries the main widget. As a last resort it uses the Information icon.

The about box has a single button labelled "OK".

Ver también:: QWidget::icon() QApplication::mainWidget()

static void QMessageBox::about	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text
	)		`[static]`

void QMessageBox::aboutQt	(	QWidget *	parent,
		const QString &	caption = `QString::null`
	)		`[static]`

Displays a simple message box about Qt, with caption caption and centered over parent (if parent is not 0). The message includes the version number of Qt being used by the application.

This is useful for inclusion in the Help menu of an application. See the examples/menu/menu.cpp example.

QApplication provides this functionality as a slot.

Ver también:: QApplication::aboutQt()

static void QMessageBox::aboutQt	(	QWidget *	parent,
		const QString &	caption = `QString::null`
	)		`[static]`

void QMessageBox::adjustSize ( ) [virtual]

Adjusts the size of the message box to fit the contents just before QDialog::exec() or QDialog::show() is called.

This function will not be called if the message box has been explicitly resized before showing it.

Reimplementado de QWidget.

void QMessageBox::adjustSize ( ) [virtual]

Adjusts the size of the widget to fit the contents.

Uses sizeHint() if valid (i.e if the size hint's width and height are >= 0), otherwise sets the size to the children rectangle (the union of all child widget geometries).

Ver también:: sizeHint(), childrenRect()

Reimplementado de QWidget.

QString QMessageBox::buttonText ( int button ) const

Returns the text of the message box button button, or QString::null if the message box does not contain the button.

Ver también:: setButtonText()

QString QMessageBox::buttonText ( int button ) const

void QMessageBox::closeEvent ( QCloseEvent * e ) [protected, virtual]

Reimplementado de QDialog.

void QMessageBox::closeEvent ( QCloseEvent * e ) [protected, virtual]

Reimplementado de QDialog.

int QMessageBox::critical	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		const QString &	button0Text = `QString::null`,
		const QString &	button1Text = `QString::null`,
		const QString &	button2Text = `QString::null`,
		int	defaultButtonNumber = `0`,
		int	escapeButtonNumber = `-1`
	)		`[static]`

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. Displays a critical error message box with a caption, a text, and 1, 2 or 3 buttons. Returns the number of the button that was clicked (0, 1 or 2).

button0Text is the text of the first button, and is optional. If button0Text is not supplied, "OK" (translated) will be used. button1Text is the text of the second button, and is optional, and button2Text is the text of the third button, and is optional. defaultButtonNumber (0, 1 or 2) is the index of the default button; pressing Return or Enter is the same as clicking the default button. It defaults to 0 (the first button). escapeButtonNumber is the index of the Escape button; pressing Escape is the same as clicking this button. It defaults to -1; supply 0, 1, or 2 to make pressing Escape equivalent to clicking the relevant button.

If parent is 0, the message box becomes an application-global modal dialog box. If parent is a widget, the message box becomes modal relative to parent.

Ver también:: information(), question(), warning()

static int QMessageBox::critical	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		int	button0,
		int	button1,
		int	button2 = `0`
	)		`[static]`

static int QMessageBox::critical	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		const QString &	button0Text = `QString::null`,
		const QString &	button1Text = `QString::null`,
		const QString &	button2Text = `QString::null`,
		int	defaultButtonNumber = `0`,
		int	escapeButtonNumber = `-1`
	)		`[static]`

int QMessageBox::critical	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		int	button0,
		int	button1,
		int	button2 = `0`
	)		`[static]`

Opens a critical message box with the caption caption and the text text. The dialog may have up to three buttons. Each of the button parameters, button0, button1 and button2 may be set to one of the following values:

QMessageBox::NoButton QMessageBox::Ok QMessageBox::Cancel QMessageBox::Yes QMessageBox::No QMessageBox::Abort QMessageBox::Retry QMessageBox::Ignore QMessageBox::YesAll QMessageBox::NoAll

If you don't want all three buttons, set the last button, or last two buttons to QMessageBox::NoButton.

One button can be OR-ed with QMessageBox::Default, and one button can be OR-ed with QMessageBox::Escape.

Returns the identity (QMessageBox::Ok, or QMessageBox::No, etc.) of the button that was clicked.

If parent is 0, the message box becomes an application-global modal dialog box. If parent is a widget, the message box becomes modal relative to parent.

Ver también:: information(), question(), warning()

Icon QMessageBox::icon ( ) const

Reimplementado de QWidget.

Icon QMessageBox::icon ( ) const

Reimplementado de QWidget.

const QPixmap* QMessageBox::iconPixmap ( ) const

static int QMessageBox::information	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		int	button0,
		int	button1 = `0`,
		int	button2 = `0`
	)		`[static]`

static int QMessageBox::information	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		const QString &	button0Text = `QString::null`,
		const QString &	button1Text = `QString::null`,
		const QString &	button2Text = `QString::null`,
		int	defaultButtonNumber = `0`,
		int	escapeButtonNumber = `-1`
	)		`[static]`

int QMessageBox::information	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		const QString &	button0Text = `QString::null`,
		const QString &	button1Text = `QString::null`,
		const QString &	button2Text = `QString::null`,
		int	defaultButtonNumber = `0`,
		int	escapeButtonNumber = `-1`
	)		`[static]`

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. Displays an information message box with caption caption, text text and one, two or three buttons. Returns the index of the button that was clicked (0, 1 or 2).

button0Text is the text of the first button, and is optional. If button0Text is not supplied, "OK" (translated) will be used. button1Text is the text of the second button, and is optional. button2Text is the text of the third button, and is optional. defaultButtonNumber (0, 1 or 2) is the index of the default button; pressing Return or Enter is the same as clicking the default button. It defaults to 0 (the first button). escapeButtonNumber is the index of the Escape button; pressing Escape is the same as clicking this button. It defaults to -1; supply 0, 1 or 2 to make pressing Escape equivalent to clicking the relevant button.

If parent is 0, the message box becomes an application-global modal dialog box. If parent is a widget, the message box becomes modal relative to parent.

Note: If you do not specify an Escape button then if the Escape button is pressed then -1 will be returned. It is suggested that you specify an Escape button to prevent this from happening.

Ver también:: question(), warning(), critical()

int QMessageBox::information	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		int	button0,
		int	button1 = `0`,
		int	button2 = `0`
	)		`[static]`

Opens an information message box with the caption caption and the text text. The dialog may have up to three buttons. Each of the buttons, button0, button1 and button2 may be set to one of the following values:

QMessageBox::NoButton QMessageBox::Ok QMessageBox::Cancel QMessageBox::Yes QMessageBox::No QMessageBox::Abort QMessageBox::Retry QMessageBox::Ignore QMessageBox::YesAll QMessageBox::NoAll

If you don't want all three buttons, set the last button, or last two buttons to QMessageBox::NoButton.

One button can be OR-ed with QMessageBox::Default, and one button can be OR-ed with QMessageBox::Escape.

Returns the identity (QMessageBox::Ok, or QMessageBox::No, etc.) of the button that was clicked.

If parent is 0, the message box becomes an application-global modal dialog box. If parent is a widget, the message box becomes modal relative to parent.

Ver también:: question(), warning(), critical()

void QMessageBox::keyPressEvent ( QKeyEvent * e ) [protected, virtual]

Reimplementado de QDialog.

void QMessageBox::keyPressEvent ( QKeyEvent * e ) [protected, virtual]

Reimplementado de QDialog.

static int QMessageBox::message	(	const QString &	caption,
		const QString &	text,
		const QString &	buttonText = `QString::null`,
		QWidget *	parent = `0`,
		const char *	= `0`
	)		`[inline, static]`

int QMessageBox::message	(	const QString &	caption,
		const QString &	text,
		const QString &	buttonText = `QString::null`,
		QWidget *	parent = `0`,
		const char *	= `0`
	)		`[inline, static]`

Opens a modal message box directly using the specified parameters.

Please use information(), warning(), question(), or critical() instead.

static bool QMessageBox::query	(	const QString &	caption,
		const QString &	text,
		const QString &	yesButtonText = `QString::null`,
		const QString &	noButtonText = `QString::null`,
		QWidget *	parent = `0`,
		const char *	= `0`
	)		`[inline, static]`

bool QMessageBox::query	(	const QString &	caption,
		const QString &	text,
		const QString &	yesButtonText = `QString::null`,
		const QString &	noButtonText = `QString::null`,
		QWidget *	parent = `0`,
		const char *	= `0`
	)		`[inline, static]`

Queries the user using a modal message box with two buttons. Note that caption is not always shown, it depends on the window manager.

Please use information(), question(), warning(), or critical() instead.

int QMessageBox::question	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		const QString &	button0Text = `QString::null`,
		const QString &	button1Text = `QString::null`,
		const QString &	button2Text = `QString::null`,
		int	defaultButtonNumber = `0`,
		int	escapeButtonNumber = `-1`
	)		`[static]`

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. Displays a question message box with caption caption, text text and one, two or three buttons. Returns the index of the button that was clicked (0, 1 or 2).

button0Text is the text of the first button, and is optional. If button0Text is not supplied, "OK" (translated) will be used. button1Text is the text of the second button, and is optional. button2Text is the text of the third button, and is optional. defaultButtonNumber (0, 1 or 2) is the index of the default button; pressing Return or Enter is the same as clicking the default button. It defaults to 0 (the first button). escapeButtonNumber is the index of the Escape button; pressing Escape is the same as clicking this button. It defaults to -1; supply 0, 1 or 2 to make pressing Escape equivalent to clicking the relevant button.

If parent is 0, the message box becomes an application-global modal dialog box. If parent is a widget, the message box becomes modal relative to parent.

Note: If you do not specify an Escape button then if the Escape button is pressed then -1 will be returned. It is suggested that you specify an Escape button to prevent this from happening.

Ver también:: information(), warning(), critical()

static int QMessageBox::question	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		int	button0,
		int	button1 = `0`,
		int	button2 = `0`
	)		`[static]`

static int QMessageBox::question	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		const QString &	button0Text = `QString::null`,
		const QString &	button1Text = `QString::null`,
		const QString &	button2Text = `QString::null`,
		int	defaultButtonNumber = `0`,
		int	escapeButtonNumber = `-1`
	)		`[static]`

int QMessageBox::question	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		int	button0,
		int	button1 = `0`,
		int	button2 = `0`
	)		`[static]`

Opens a question message box with the caption caption and the text text. The dialog may have up to three buttons. Each of the buttons, button0, button1 and button2 may be set to one of the following values:

QMessageBox::NoButton QMessageBox::Ok QMessageBox::Cancel QMessageBox::Yes QMessageBox::No QMessageBox::Abort QMessageBox::Retry QMessageBox::Ignore QMessageBox::YesAll QMessageBox::NoAll

If you don't want all three buttons, set the last button, or last two buttons to QMessageBox::NoButton.

One button can be OR-ed with QMessageBox::Default, and one button can be OR-ed with QMessageBox::Escape.

Returns the identity (QMessageBox::Yes, or QMessageBox::No, etc.) of the button that was clicked.

If parent is 0, the message box becomes an application-global modal dialog box. If parent is a widget, the message box becomes modal relative to parent.

Ver también:: information(), warning(), critical()

void QMessageBox::resizeEvent ( QResizeEvent * ) [protected, virtual]

Reimplementado de QDialog.

void QMessageBox::resizeEvent ( QResizeEvent * ) [protected, virtual]

Reimplementado de QDialog.

void QMessageBox::setButtonText	(	int	button,
		const QString &	text
	)

Sets the text of the message box button button to text. Setting the text of a button that is not in the message box is silently ignored.

Ver también:: buttonText()

void QMessageBox::setButtonText	(	int	button,
		const QString &
	)

void QMessageBox::setIcon ( Icon )

void QMessageBox::setIcon ( Icon icon )

void QMessageBox::setIcon ( const QPixmap & pix ) [virtual]

Reimplementado de QWidget.

void QMessageBox::setIcon ( const QPixmap & pixmap ) [virtual]

Sets the window icon to pixmap.

Ver también:: icon(), setIconText(), setCaption(), Setting the Application Icon

Reimplementado de QWidget.

void QMessageBox::setIconPixmap ( const QPixmap & pixmap )

void QMessageBox::setIconPixmap ( const QPixmap & )

void QMessageBox::setText ( const QString & text )

void QMessageBox::setText ( const QString & )

void QMessageBox::setTextFormat ( Qt::TextFormat format )

void QMessageBox::setTextFormat ( TextFormat )

void QMessageBox::showEvent ( QShowEvent * e ) [protected, virtual]

Reimplementado de QWidget.

void QMessageBox::showEvent ( QShowEvent * ) [protected, virtual]

This event handler can be reimplemented in a subclass to receive widget show events.

Non-spontaneous show events are sent to widgets immediately before they are shown. The spontaneous show events of top-level widgets are delivered afterwards.

Ver también:: event(), QShowEvent

Reimplementado de QWidget.

QPixmap QMessageBox::standardIcon	(	Icon	icon,
		GUIStyle	style
	)		`[static]`

Returns the pixmap used for a standard icon. This allows the pixmaps to be used in more complex message boxes. icon specifies the required icon, e.g. QMessageBox::Information, QMessageBox::Warning or QMessageBox::Critical.

style is unused.

QPixmap QMessageBox::standardIcon ( Icon icon ) [static]

Returns the pixmap used for a standard icon. This allows the pixmaps to be used in more complex message boxes. icon specifies the required icon, e.g. QMessageBox::Question, QMessageBox::Information, QMessageBox::Warning or QMessageBox::Critical.

static QPixmap QMessageBox::standardIcon ( Icon icon ) [static]

static QPixmap QMessageBox::standardIcon	(	Icon	icon,
		GUIStyle
	)		`[static]`

void QMessageBox::styleChanged ( QStyle & ) [protected]

QString QMessageBox::text ( ) const

TextFormat QMessageBox::textFormat ( ) const

int QMessageBox::warning	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		int	button0,
		int	button1,
		int	button2 = `0`
	)		`[static]`

Opens a warning message box with the caption caption and the text text. The dialog may have up to three buttons. Each of the button parameters, button0, button1 and button2 may be set to one of the following values:

QMessageBox::NoButton QMessageBox::Ok QMessageBox::Cancel QMessageBox::Yes QMessageBox::No QMessageBox::Abort QMessageBox::Retry QMessageBox::Ignore QMessageBox::YesAll QMessageBox::NoAll

If you don't want all three buttons, set the last button, or last two buttons to QMessageBox::NoButton.

One button can be OR-ed with QMessageBox::Default, and one button can be OR-ed with QMessageBox::Escape.

Returns the identity (QMessageBox::Ok, or QMessageBox::No, etc.) of the button that was clicked.

If parent is 0, the message box becomes an application-global modal dialog box. If parent is a widget, the message box becomes modal relative to parent.

Ver también:: information(), question(), critical()

static int QMessageBox::warning	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		const QString &	button0Text = `QString::null`,
		const QString &	button1Text = `QString::null`,
		const QString &	button2Text = `QString::null`,
		int	defaultButtonNumber = `0`,
		int	escapeButtonNumber = `-1`
	)		`[static]`

int QMessageBox::warning	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		const QString &	button0Text = `QString::null`,
		const QString &	button1Text = `QString::null`,
		const QString &	button2Text = `QString::null`,
		int	defaultButtonNumber = `0`,
		int	escapeButtonNumber = `-1`
	)		`[static]`

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. Displays a warning message box with a caption, a text, and 1, 2 or 3 buttons. Returns the number of the button that was clicked (0, 1, or 2).

button0Text is the text of the first button, and is optional. If button0Text is not supplied, "OK" (translated) will be used. button1Text is the text of the second button, and is optional, and button2Text is the text of the third button, and is optional. defaultButtonNumber (0, 1 or 2) is the index of the default button; pressing Return or Enter is the same as clicking the default button. It defaults to 0 (the first button). escapeButtonNumber is the index of the Escape button; pressing Escape is the same as clicking this button. It defaults to -1; supply 0, 1, or 2 to make pressing Escape equivalent to clicking the relevant button.

If parent is 0, the message box becomes an application-global modal dialog box. If parent is a widget, the message box becomes modal relative to parent.

Note: If you do not specify an Escape button then if the Escape button is pressed then -1 will be returned. It is suggested that you specify an Escape button to prevent this from happening.

Ver también:: information(), question(), critical()

static int QMessageBox::warning	(	QWidget *	parent,
		const QString &	caption,
		const QString &	text,
		int	button0,
		int	button1,
		int	button2 = `0`
	)		`[static]`

Documentación de propiedades

Icon QMessageBox::icon [read, write]

the message box's icon

The icon of the message box can be one of the following predefined icons: QMessageBox::NoIcon QMessageBox::Question QMessageBox::Information QMessageBox::Warning QMessageBox::Critical

The actual pixmap used for displaying the icon depends on the current GUI style. You can also set a custom pixmap icon using the QMessageBox::iconPixmap property. The default icon is QMessageBox::NoIcon.

Ver también:: iconPixmap

Reimplementado de QWidget.

QPixmap QMessageBox::iconPixmap [read, write]

the current icon

The icon currently used by the message box. Note that it's often hard to draw one pixmap that looks appropriate in both Motif and Windows GUI styles; you may want to draw two pixmaps.

Ver también:: icon

QString QMessageBox::text [read, write]

the message box text to be displayed.

The text will be interpreted either as a plain text or as rich text, depending on the text format setting ( QMessageBox::textFormat). The default setting is AutoText, i.e. the message box will try to auto-detect the format of the text.

The default value of this property is QString::null.

Ver también:: textFormat

TextFormat QMessageBox::textFormat [read, write]

the format of the text displayed by the message box

The current text format used by the message box. See the Qt::TextFormat enum for an explanation of the possible options.

The default format is AutoText.

Ver también:: setText()

La documentación para esta clase fue generada a partir de los siguientes ficheros:

src/qt/include/qmessagebox.h
src/qt/src/dialogs/qmessagebox.h
src/qt/src/dialogs/qmessagebox.cpp

Tipos públicos

Métodos públicos

Métodos públicos estáticos

Métodos protegidos

Propiedades

Descripción detallada

Documentación de las enumeraciones miembro de la clase

Documentación del constructor y destructor

Documentación de las funciones miembro

Documentación de propiedades