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CentOS 7.0 - man page for qaction (centos section 3qt)

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QAction(3qt)									     QAction(3qt)

NAME
       QAction - Abstract user interface action that can appear both in menus and tool bars

SYNOPSIS
       #include <qaction.h>

       Inherits QObject.

       Inherited by QActionGroup.

   Public Members
       QAction ( QObject * parent, const char * name = 0 )
       QAction ( const QString & menuText, QKeySequence accel, QObject * parent, const char *
	   name = 0 )
       QAction ( const QIconSet & icon, const QString & menuText, QKeySequence accel, QObject *
	   parent, const char * name = 0 )
       QAction ( const QString & text, const QIconSet & icon, const QString & menuText,
	   QKeySequence accel, QObject * parent, const char * name = 0, bool toggle = FALSE )
	   (obsolete)
       QAction ( const QString & text, const QString & menuText, QKeySequence accel, QObject *
	   parent, const char * name = 0, bool toggle = FALSE )  (obsolete)
       QAction ( QObject * parent, const char * name, bool toggle )  (obsolete)
       ~QAction ()
       virtual void setIconSet ( const QIconSet & )
       QIconSet iconSet () const
       virtual void setText ( const QString & )
       QString text () const
       virtual void setMenuText ( const QString & )
       QString menuText () const
       virtual void setToolTip ( const QString & )
       QString toolTip () const
       virtual void setStatusTip ( const QString & )
       QString statusTip () const
       virtual void setWhatsThis ( const QString & )
       QString whatsThis () const
       virtual void setAccel ( const QKeySequence & key )
       QKeySequence accel () const
       virtual void setToggleAction ( bool )
       bool isToggleAction () const
       bool isOn () const
       bool isEnabled () const
       bool isVisible () const
       virtual bool addTo ( QWidget * w )
       virtual bool removeFrom ( QWidget * w )

   Public Slots
       void activate ()
       void toggle ()
       virtual void setOn ( bool )
       virtual void setEnabled ( bool )
       void setDisabled ( bool disable )
       void setVisible ( bool )

   Signals
       void activated ()
       void toggled ( bool on )

   Properties
       QKeySequence accel - the action's accelerator key
       bool enabled - whether the action is enabled
       QIconSet iconSet - the action's icon
       QString menuText - the action's menu text
       bool on - whether a toggle action is on
       QString statusTip - the action's status tip
       QString text - the action's descriptive text
       bool toggleAction - whether the action is a toggle action
       QString toolTip - the action's tool tip
       bool visible - whether the action can be seen (e.g. in menus and toolbars)
       QString whatsThis - the action's "What's This?" help text

   Protected Members
       virtual void addedTo ( QWidget * actionWidget, QWidget * container )
       virtual void addedTo ( int index, QPopupMenu * menu )

DESCRIPTION
       The QAction class provides an abstract user interface action that can appear both in menus
       and tool bars.

       In GUI applications many commands can be invoked via a menu option, a toolbar button and a
       keyboard accelerator. Since the same action must be performed regardless of how the action
       was invoked, and since the menu and toolbar should be kept in sync, it is useful to
       represent a command as an action. An action can be added to a menu and a toolbar and will
       automatically keep them in sync. For example, if the user presses a Bold toolbar button
       the Bold menu item will automatically be checked.

       A QAction may contain an icon, a menu text, an accelerator, a status text, a whats this
       text and a tool tip. Most of these can be set in the constructor. They can also be set
       independently with setIconSet(), setText(), setMenuText(), setToolTip(), setStatusTip(),
       setWhatsThis() and setAccel().

       An action may be a toggle action e.g. a Bold toolbar button, or a command action, e.g.
       'Open File' to invoke an open file dialog. Toggle actions emit the toggled() signal when
       their state changes. Both command and toggle actions emit the activated() signal when they
       are invoked. Use setToggleAction() to set an action's toggled status. To see if an action
       is a toggle action use isToggleAction(). A toggle action may be "on", isOn() returns TRUE,
       or "off", isOn() returns FALSE.

       Actions are added to widgets (menus or toolbars) using addTo(), and removed using
       removeFrom().

       Once a QAction has been created it should be added to the relevant menu and toolbar and
       then connected to the slot which will perform the action. For example:

	       fileOpenAction = new QAction( QPixmap( fileopen ), "&Open...",
					     CTRL+Key_O, this, "open" );
	       connect( fileOpenAction, SIGNAL( activated() ) , this, SLOT( choose() ) );

       We create a "File Save" action with a menu text of "&Save" and Ctrl+S as the keyboard
       accelerator. We connect the fileSaveAction's activated() signal to our own save() slot.
       Note that at this point there is no menu or toolbar action, we'll add them next:

	       QToolBar * fileTools = new QToolBar( this, "file operations" );

	       fileSaveAction->addTo( fileTools );

	       QPopupMenu * file = new QPopupMenu( this );
	       menuBar()->insertItem( "&File", file );

	       fileSaveAction->addTo( file );

       We create a toolbar and add our fileSaveAction to it. Similarly we create a menu, add a
       top-level menu item, and add our fileSaveAction.

       We recommend that actions are created as children of the window that they are used in. In
       most cases actions will be children of the application's main window.

       To prevent recursion, don't create an action as a child of a widget that the action is
       later added to.

       See also Main Window and Related Classes and Basic Widgets.

MEMBER FUNCTION DOCUMENTATION
QAction::QAction ( QObject * parent, const char * name = 0 )
       Constructs an action called name with parent parent.

       If parent is a QActionGroup, the new action inserts itself into parent.

       For accelerators and status tips to work, parent must either be a widget, or an action
       group whose parent is a widget.

       Warning: To prevent recursion, don't create an action as a child of a widget that the
       action is later added to.

QAction::QAction ( const QString & menuText, QKeySequence accel, QObject * parent, const char *
       name = 0 )
       This constructor results in an icon-less action with the the menu text menuText and
       keyboard accelerator accel. It is a child of parent and called name.

       If parent is a QActionGroup, the action automatically becomes a member of it.

       For accelerators and status tips to work, parent must either be a widget, or an action
       group whose parent is a widget.

       The action uses a stripped version of menuText (e.g. "&Menu Option..." becomes "Menu
       Option") as descriptive text for toolbuttons. You can override this by setting a specific
       description with setText(). The same text and accel will be used for tool tips and status
       tips unless you provide text for these using setToolTip() and setStatusTip().

       Call setToggleAction(TRUE) to make the action a toggle action.

       Warning: To prevent recursion, don't create an action as a child of a widget that the
       action is later added to.

QAction::QAction ( const QIconSet & icon, const QString & menuText, QKeySequence accel, QObject *
       parent, const char * name = 0 )
       This constructor creates an action with the following properties: the icon or iconset
       icon, the menu text menuText and keyboard accelerator accel. It is a child of parent and
       called name.

       If parent is a QActionGroup, the action automatically becomes a member of it.

       For accelerators and status tips to work, parent must either be a widget, or an action
       group whose parent is a widget.

       The action uses a stripped version of menuText (e.g. "&Menu Option..." becomes "Menu
       Option") as descriptive text for toolbuttons. You can override this by setting a specific
       description with setText(). The same text and accel will be used for tool tips and status
       tips unless you provide text for these using setToolTip() and setStatusTip().

       Call setToggleAction(TRUE) to make the action a toggle action.

       Warning: To prevent recursion, don't create an action as a child of a widget that the
       action is later added to.

QAction::QAction ( const QString & text, const QIconSet & icon, const QString & menuText,
       QKeySequence accel, QObject * parent, const char * name = 0, bool toggle = FALSE )
       This function is obsolete. It is provided to keep old source working. We strongly advise
       against using it in new code.

       This constructor creates an action with the following properties: the description text,
       the icon or iconset icon, the menu text menuText and keyboard accelerator accel. It is a
       child of parent and called name. If toggle is TRUE the action will be a toggle action,
       otherwise it will be a command action.

       If parent is a QActionGroup, the action automatically becomes a member of it.

       For accelerators and status tips to work, parent must either be a widget, or an action
       group whose parent is a widget.

       The text and accel will be used for tool tips and status tips unless you provide specific
       text for these using setToolTip() and setStatusTip().

QAction::QAction ( const QString & text, const QString & menuText, QKeySequence accel, QObject *
       parent, const char * name = 0, bool toggle = FALSE )
       This function is obsolete. It is provided to keep old source working. We strongly advise
       against using it in new code.

       This constructor results in an icon-less action with the description text, the menu text
       menuText and the keyboard accelerator accel. Its parent is parent and it is called name.
       If toggle is TRUE the action will be a toggle action, otherwise it will be a command
       action.

       The action automatically becomes a member of parent if parent is a QActionGroup.

       For accelerators and status tips to work, parent must either be a widget, or an action
       group whose parent is a widget.

       The text and accel will be used for tool tips and status tips unless you provide specific
       text for these using setToolTip() and setStatusTip().

QAction::QAction ( QObject * parent, const char * name, bool toggle )
       This function is obsolete. It is provided to keep old source working. We strongly advise
       against using it in new code.

       Constructs an action called name with parent parent.

       If toggle is TRUE the action will be a toggle action, otherwise it will be a command
       action.

       If parent is a QActionGroup, the new action inserts itself into parent.

       For accelerators and status tips to work, parent must either be a widget, or an action
       group whose parent is a widget.

QAction::~QAction ()
       Destroys the object and frees allocated resources.

QKeySequence QAction::accel () const
       Returns the action's accelerator key. See the "accel" property for details.

void QAction::activate () [slot]
       Activates the action and executes all connected slots. This only works for actions that
       are not toggle action.

       See also toggle().

void QAction::activated () [signal]
       This signal is emitted when an action is activated by the user, e.g. when the user clicks
       a menu option or a toolbar button or presses an action's accelerator key combination.

       Connect to this signal for command actions. Connect to the toggled() signal for toggle
       actions.

       Examples:

bool QAction::addTo ( QWidget * w ) [virtual]
       Adds this action to widget w.

       Currently actions may be added to QToolBar and QPopupMenu widgets.

       An action added to a tool bar is automatically displayed as a tool button; an action added
       to a pop up menu appears as a menu option.

       addTo() returns TRUE if the action was added successfully and FALSE otherwise. (If w is
       not a QToolBar or QPopupMenu the action will not be added and FALSE will be returned.)

       See also removeFrom().

       Examples:

       Reimplemented in QActionGroup.

void QAction::addedTo ( QWidget * actionWidget, QWidget * container ) [virtual protected]
       This function is called from the addTo() function when it has created a widget
       (actionWidget) for the action in the container.

void QAction::addedTo ( int index, QPopupMenu * menu ) [virtual protected]
       This is an overloaded member function, provided for convenience. It behaves essentially
       like the above function.

       This function is called from the addTo() function when it has created a menu item at the
       index position index in the popup menu menu.

QIconSet QAction::iconSet () const
       Returns the action's icon. See the "iconSet" property for details.

bool QAction::isEnabled () const
       Returns TRUE if the action is enabled; otherwise returns FALSE. See the "enabled" property
       for details.

bool QAction::isOn () const
       Returns TRUE if a toggle action is on; otherwise returns FALSE. See the "on" property for
       details.

bool QAction::isToggleAction () const
       Returns TRUE if the action is a toggle action; otherwise returns FALSE. See the
       "toggleAction" property for details.

bool QAction::isVisible () const
       Returns TRUE if the action can be seen (e.g. in menus and toolbars); otherwise returns
       FALSE. See the "visible" property for details.

QString QAction::menuText () const
       Returns the action's menu text. See the "menuText" property for details.

bool QAction::removeFrom ( QWidget * w ) [virtual]
       Removes the action from widget w.

       Returns TRUE if the action was removed successfully; otherwise returns FALSE.

       See also addTo().

void QAction::setAccel ( const QKeySequence & key ) [virtual]
       Sets the action's accelerator key to key. See the "accel" property for details.

void QAction::setDisabled ( bool disable ) [slot]
       Disables the action if disable is TRUE; otherwise enables the action.

       See the enabled documentation for more information.

void QAction::setEnabled ( bool ) [virtual slot]
       Sets whether the action is enabled. See the "enabled" property for details.

void QAction::setIconSet ( const QIconSet & ) [virtual]
       Sets the action's icon. See the "iconSet" property for details.

void QAction::setMenuText ( const QString & ) [virtual]
       Sets the action's menu text. See the "menuText" property for details.

void QAction::setOn ( bool ) [virtual slot]
       Sets whether a toggle action is on. See the "on" property for details.

void QAction::setStatusTip ( const QString & ) [virtual]
       Sets the action's status tip. See the "statusTip" property for details.

void QAction::setText ( const QString & ) [virtual]
       Sets the action's descriptive text. See the "text" property for details.

void QAction::setToggleAction ( bool ) [virtual]
       Sets whether the action is a toggle action. See the "toggleAction" property for details.

void QAction::setToolTip ( const QString & ) [virtual]
       Sets the action's tool tip. See the "toolTip" property for details.

void QAction::setVisible ( bool ) [slot]
       Sets whether the action can be seen (e.g. in menus and toolbars). See the "visible"
       property for details.

void QAction::setWhatsThis ( const QString & ) [virtual]
       Sets the action's "What's This?" help text. See the "whatsThis" property for details.

QString QAction::statusTip () const
       Returns the action's status tip. See the "statusTip" property for details.

QString QAction::text () const
       Returns the action's descriptive text. See the "text" property for details.

void QAction::toggle () [slot]
       Toggles the state of a toggle action.

       See also on, activate(), toggled(), and toggleAction.

void QAction::toggled ( bool on ) [signal]
       This signal is emitted when a toggle action changes state; command actions and
       QActionGroups don't emit toggled().

       The on argument denotes the new state: If on is TRUE the toggle action is switched on, and
       if on is FALSE the toggle action is switched off.

       To trigger a user command depending on whether a toggle action has been switched on or off
       connect it to a slot that takes a bool to indicate the state, e.g.

	       QMainWindow * window = new QMainWindow;

	       QAction * labelonoffaction = new QAction( window, "labelonoff" );

	       QObject::connect( labelonoffaction, SIGNAL( toggled( bool ) ),
				 window, SLOT( setUsesTextLabel( bool ) ) );

       See also activated(), toggleAction, and on.

       Example: action/toggleaction/toggleaction.cpp.

QString QAction::toolTip () const
       Returns the action's tool tip. See the "toolTip" property for details.

QString QAction::whatsThis () const
       Returns the action's "What's This?" help text. See the "whatsThis" property for details.

   Property Documentation
QKeySequence accel
       This property holds the action's accelerator key.

       The keycodes can be found in Qt::Key and Qt::Modifier. There is no default accelerator
       key.

       Set this property's value with setAccel() and get this property's value with accel().

bool enabled
       This property holds whether the action is enabled.

       Disabled actions can't be chosen by the user. They don't disappear from the menu/tool bar
       but are displayed in a way which indicates that they are unavailable, e.g. they might be
       displayed grayed out.

       What's this? help on disabled actions is still available provided the QAction::whatsThis
       property is set.

       Set this property's value with setEnabled() and get this property's value with
       isEnabled().

QIconSet iconSet
       This property holds the action's icon.

       The icon is used as the tool button icon and in the menu to the left of the menu text.
       There is no default icon.

       If a null icon (QIconSet::isNull() is passed into this function, the icon of the action is
       cleared.

       (See the action/toggleaction/toggleaction.cpp example.)

       Set this property's value with setIconSet() and get this property's value with iconSet().

QString menuText
       This property holds the action's menu text.

       If the action is added to a menu the menu option will consist of the icon (if there is
       one), the menu text and the accelerator (if there is one). If the menu text is not
       explicitly set in the constructor or by using setMenuText() the action's description text
       will be used as the menu text. There is no default menu text.

       See also text.

       Set this property's value with setMenuText() and get this property's value with
       menuText().

bool on
       This property holds whether a toggle action is on.

       This property is always on (TRUE) for command actions and QActionGroups; setOn() has no
       effect on them. For action's where isToggleAction() is TRUE, this property's default value
       is off (FALSE).

       See also toggleAction.

       Set this property's value with setOn() and get this property's value with isOn().

QString statusTip
       This property holds the action's status tip.

       The statusTip is displayed on all status bars that this action's toplevel parent widget
       provides.

       If no status tip is defined, the action uses the tool tip text.

       There is no default statusTip text.

       See also statusTip and toolTip.

       Set this property's value with setStatusTip() and get this property's value with
       statusTip().

QString text
       This property holds the action's descriptive text.

       If QMainWindow::usesTextLabel is TRUE, the text appears as a label in the relevant tool
       button. It also serves as the default text in menus and tool tips if these have not been
       specifically defined. There is no default text.

       See also menuText, toolTip, and statusTip.

       Set this property's value with setText() and get this property's value with text().

bool toggleAction
       This property holds whether the action is a toggle action.

       A toggle action is one which has an on/off state. For example a Bold toolbar button is
       either on or off. An action which is not a toggle action is a command action; a command
       action is simply executed, e.g. file save. This property's default is FALSE.

       In some situations, the state of one toggle action should depend on the state of others.
       For example, "Left Align", "Center" and" Right Align" toggle actions are mutually
       exclusive. To achieve exclusive toggling, add the relevant toggle actions to a
       QActionGroup with the QActionGroup::exclusive property set to TRUE.

       Set this property's value with setToggleAction() and get this property's value with
       isToggleAction().

QString toolTip
       This property holds the action's tool tip.

       This text is used for the tool tip. If no status tip has been set the tool tip will be
       used for the status tip.

       If no tool tip is specified the action's text is used, and if that hasn't been specified
       the description text is used as the tool tip text.

       There is no default tool tip text.

       See also statusTip and accel.

       Set this property's value with setToolTip() and get this property's value with toolTip().

bool visible
       This property holds whether the action can be seen (e.g. in menus and toolbars).

       If visible is TRUE the action can be seen (e.g. in menus and toolbars) and chosen by the
       user; if visible is FALSE the action cannot be seen or chosen by the user.

       Actions which are not visible are not grayed out; they do not appear at all.

       Set this property's value with setVisible() and get this property's value with
       isVisible().

QString whatsThis
       This property holds the action's "What's This?" help text.

       The whats this text is used to provide a brief description of the action. The text may
       contain rich text (HTML-like tags -- see QStyleSheet for the list of supported tags).
       There is no default" What's This" text.

       See also QWhatsThis.

       Set this property's value with setWhatsThis() and get this property's value with
       whatsThis().

SEE ALSO
       http://doc.trolltech.com/qaction.html http://www.trolltech.com/faq/tech.html

COPYRIGHT
       Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com.  See the license file
       included in the distribution for a complete license statement.

AUTHOR
       Generated automatically from the source code.

BUGS
       If you find a bug in Qt, please report it as described in
       http://doc.trolltech.com/bughowto.html.	Good bug reports help us to help you. Thank you.

       The definitive Qt documentation is provided in HTML format; it is located at
       $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is
       provided as a convenience for those users who prefer man pages, although this format is
       not officially supported by Trolltech.

       If you find errors in this manual page, please report them to qt-bugs@trolltech.com.
       Please include the name of the manual page (qaction.3qt) and the Qt version (3.3.8).

Trolltech AS				 2 February 2007			     QAction(3qt)
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