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< td align = "right" valign = "center" > < img src = "logo32.png" align = "right" width = "64" height = "32" border = "0" > < / td > < / tr > < / table > < h1 align = center > TQEvent Class Reference< / h1 >
< p > The TQEvent class is the base class of all
event classes. Event objects contain event parameters.
< a href = "#details" > More...< / a >
< p > < tt > #include < < a href = "qevent-h.html" > ntqevent.h< / a > > < / tt >
< p > Inherits < a href = "ntqt.html" > TQt< / a > .
< p > Inherited by < a href = "qtimerevent.html" > TQTimerEvent< / a > , < a href = "qmouseevent.html" > TQMouseEvent< / a > , < a href = "qwheelevent.html" > TQWheelEvent< / a > , < a href = "qtabletevent.html" > TQTabletEvent< / a > , < a href = "qkeyevent.html" > TQKeyEvent< / a > , < a href = "qfocusevent.html" > TQFocusEvent< / a > , < a href = "qpaintevent.html" > TQPaintEvent< / a > , < a href = "qmoveevent.html" > TQMoveEvent< / a > , < a href = "qresizeevent.html" > TQResizeEvent< / a > , < a href = "qcloseevent.html" > TQCloseEvent< / a > , < a href = "qicondragevent.html" > TQIconDragEvent< / a > , < a href = "qshowevent.html" > TQShowEvent< / a > , < a href = "qhideevent.html" > TQHideEvent< / a > , < a href = "qcontextmenuevent.html" > TQContextMenuEvent< / a > , < a href = "qimevent.html" > TQIMEvent< / a > , < a href = "qdropevent.html" > TQDropEvent< / a > , < a href = "qdragleaveevent.html" > TQDragLeaveEvent< / a > , < a href = "qchildevent.html" > TQChildEvent< / a > , and < a href = "qcustomevent.html" > TQCustomEvent< / a > .
< p > < a href = "qevent-members.html" > List of all member functions.< / a >
< h2 > Public Members< / h2 >
< ul >
< li class = fn > enum < a href = "#Type-enum" > < b > Type< / b > < / a > { None = 0, Timer = 1, MouseButtonPress = 2, MouseButtonRelease = 3, MouseButtonDblClick = 4, MouseMove = 5, KeyPress = 6, KeyRelease = 7, FocusIn = 8, FocusOut = 9, Enter = 10, Leave = 11, Paint = 12, Move = 13, Resize = 14, Create = 15, Destroy = 16, Show = 17, Hide = 18, Close = 19, Quit = 20, Reparent = 21, ShowMinimized = 22, ShowNormal = 23, WindowActivate = 24, WindowDeactivate = 25, ShowToParent = 26, HideToParent = 27, ShowMaximized = 28, ShowFullScreen = 29, Accel = 30, Wheel = 31, AccelAvailable = 32, CaptionChange = 33, IconChange = 34, ParentFontChange = 35, ApplicationFontChange = 36, ParentPaletteChange = 37, ApplicationPaletteChange = 38, PaletteChange = 39, Clipboard = 40, Speech = 42, SockAct = 50, AccelOverride = 51, DeferredDelete = 52, DragEnter = 60, DragMove = 61, DragLeave = 62, Drop = 63, DragResponse = 64, ChildInserted = 70, ChildRemoved = 71, LayoutHint = 72, ShowWindowRequest = 73, WindowBlocked = 74, WindowUnblocked = 75, ActivateControl = 80, DeactivateControl = 81, ContextMenu = 82, IMStart = 83, IMCompose = 84, IMEnd = 85, Accessibility = 86, TabletMove = 87, LocaleChange = 88, LanguageChange = 89, LayoutDirectionChange = 90, Style = 91, TabletPress = 92, TabletRelease = 93, OkRequest = 94, HelpRequest = 95, WindowStateChange = 96, IconDrag = 97, User = 1000, MaxUser = 65535 }< / li >
< li class = fn > < a href = "#TQEvent" > < b > TQEvent< / b > < / a > ( Type type )< / li >
< li class = fn > virtual < a href = "#~TQEvent" > < b > ~TQEvent< / b > < / a > ()< / li >
< li class = fn > Type < a href = "#type" > < b > type< / b > < / a > () const< / li >
< li class = fn > bool < a href = "#spontaneous" > < b > spontaneous< / b > < / a > () const< / li >
< / ul >
< hr > < a name = "details" > < / a > < h2 > Detailed Description< / h2 >
The TQEvent class is the base class of all
event classes. Event objects contain event parameters.
< p >
< p > TQt's main event loop (< a href = "ntqapplication.html#exec" > TQApplication::exec< / a > ()) fetches native window
system events from the event queue, translates them into TQEvents
and sends the translated events to TQObjects.
< p > In general, events come from the underlying window system
(< a href = "#spontaneous" > spontaneous< / a > () returns TRUE) but it is also possible to manually
send events using < a href = "ntqapplication.html#sendEvent" > TQApplication::sendEvent< / a > () and
< a href = "ntqapplication.html#postEvent" > TQApplication::postEvent< / a > () (spontaneous() returns FALSE).
< p > TQObjects receive events by having their < a href = "tqobject.html#event" > TQObject::event< / a > () function
called. The function can be reimplemented in subclasses to
customize event handling and add additional event types;
< a href = "ntqwidget.html#event" > TQWidget::event< / a > () is a notable example. By default, events are
dispatched to event handlers like < a href = "tqobject.html#timerEvent" > TQObject::timerEvent< / a > () and
< a href = "ntqwidget.html#mouseMoveEvent" > TQWidget::mouseMoveEvent< / a > (). < a href = "tqobject.html#installEventFilter" > TQObject::installEventFilter< / a > () allows an
object to intercept events destined for another object.
< p > The basic TQEvent contains only an event type parameter.
Subclasses of TQEvent contain additional parameters that describe
the particular event.
< p > < p > See also < a href = "tqobject.html#event" > TQObject::event< / a > (), < a href = "tqobject.html#installEventFilter" > TQObject::installEventFilter< / a > (), < a href = "ntqwidget.html#event" > TQWidget::event< / a > (), < a href = "ntqapplication.html#sendEvent" > TQApplication::sendEvent< / a > (), < a href = "ntqapplication.html#postEvent" > TQApplication::postEvent< / a > (), < a href = "ntqapplication.html#processEvents" > TQApplication::processEvents< / a > (), < a href = "environment.html" > Environment Classes< / a > , and < a href = "events.html" > Event Classes< / a > .
< hr > < h2 > Member Type Documentation< / h2 >
< h3 class = fn > < a name = "Type-enum" > < / a > TQEvent::Type< / h3 >
< p > This enum type defines the valid event types in TQt. The event
types and the specialized classes for each type are these:
< ul >
< li > < tt > TQEvent::None< / tt > - Not an event.
< li > < tt > TQEvent::Accessibility< / tt > - Accessibility information is requested
< li > < tt > TQEvent::Timer< / tt > - Regular timer events, < a href = "qtimerevent.html" > TQTimerEvent< / a > .
< li > < tt > TQEvent::MouseButtonPress< / tt > - Mouse press, < a href = "qmouseevent.html" > TQMouseEvent< / a > .
< li > < tt > TQEvent::MouseButtonRelease< / tt > - Mouse release, < a href = "qmouseevent.html" > TQMouseEvent< / a > .
< li > < tt > TQEvent::MouseButtonDblClick< / tt > - Mouse press again, < a href = "qmouseevent.html" > TQMouseEvent< / a > .
< li > < tt > TQEvent::MouseMove< / tt > - Mouse move, < a href = "qmouseevent.html" > TQMouseEvent< / a > .
< li > < tt > TQEvent::KeyPress< / tt > - Key press (including Shift, for example), < a href = "qkeyevent.html" > TQKeyEvent< / a > .
< li > < tt > TQEvent::KeyRelease< / tt > - Key release, < a href = "qkeyevent.html" > TQKeyEvent< / a > .
< li > < tt > TQEvent::IMStart< / tt > - The start of input method composition, < a href = "qimevent.html" > TQIMEvent< / a > .
< li > < tt > TQEvent::IMCompose< / tt > - Input method composition is taking place, < a href = "qimevent.html" > TQIMEvent< / a > .
< li > < tt > TQEvent::IMEnd< / tt > - The end of input method composition, < a href = "qimevent.html" > TQIMEvent< / a > .
< li > < tt > TQEvent::FocusIn< / tt > - Widget gains < a href = "focus.html#keyboard-focus" > keyboard focus< / a > , < a href = "qfocusevent.html" > TQFocusEvent< / a > .
< li > < tt > TQEvent::FocusOut< / tt > - Widget loses keyboard focus, < a href = "qfocusevent.html" > TQFocusEvent< / a > .
< li > < tt > TQEvent::Enter< / tt > - Mouse enters widget's boundaries.
< li > < tt > TQEvent::Leave< / tt > - Mouse leaves widget's boundaries.
< li > < tt > TQEvent::Paint< / tt > - Screen update necessary, < a href = "qpaintevent.html" > TQPaintEvent< / a > .
< li > < tt > TQEvent::Move< / tt > - Widget's position changed, < a href = "qmoveevent.html" > TQMoveEvent< / a > .
< li > < tt > TQEvent::Resize< / tt > - Widget's size changed, < a href = "qresizeevent.html" > TQResizeEvent< / a > .
< li > < tt > TQEvent::Show< / tt > - Widget was shown on screen, < a href = "qshowevent.html" > TQShowEvent< / a > .
< li > < tt > TQEvent::Hide< / tt > - Widget was hidden, < a href = "qhideevent.html" > TQHideEvent< / a > .
< li > < tt > TQEvent::ShowToParent< / tt > - A child widget has been shown.
< li > < tt > TQEvent::HideToParent< / tt > - A child widget has been hidden.
< li > < tt > TQEvent::Close< / tt > - Widget was closed (permanently), < a href = "qcloseevent.html" > TQCloseEvent< / a > .
< li > < tt > TQEvent::ShowNormal< / tt > - Widget should be shown normally (obsolete).
< li > < tt > TQEvent::ShowMaximized< / tt > - Widget should be shown maximized (obsolete).
< li > < tt > TQEvent::ShowMinimized< / tt > - Widget should be shown minimized (obsolete).
< li > < tt > TQEvent::ShowFullScreen< / tt > - Widget should be shown full-screen (obsolete).
< li > < tt > TQEvent::ShowWindowRequest< / tt > - Widget's window should be shown (obsolete).
< li > < tt > TQEvent::DeferredDelete< / tt > - The object will be deleted after it has
cleaned up.
< li > < tt > TQEvent::Accel< / tt > - Key press in child for shortcut key handling, < a href = "qkeyevent.html" > TQKeyEvent< / a > .
< li > < tt > TQEvent::Wheel< / tt > - Mouse wheel rolled, < a href = "qwheelevent.html" > TQWheelEvent< / a > .
< li > < tt > TQEvent::ContextMenu< / tt > - Context popup menu, < a href = "qcontextmenuevent.html" > TQContextMenuEvent< / a >
< li > < tt > TQEvent::AccelOverride< / tt > - Key press in child, for overriding shortcut key handling, < a href = "qkeyevent.html" > TQKeyEvent< / a > .
< li > < tt > TQEvent::AccelAvailable< / tt > - internal.
< li > < tt > TQEvent::WindowActivate< / tt > - Window was activated.
< li > < tt > TQEvent::WindowDeactivate< / tt > - Window was deactivated.
< li > < tt > TQEvent::CaptionChange< / tt > - Widget's caption changed.
< li > < tt > TQEvent::IconChange< / tt > - Widget's icon changed.
< li > < tt > TQEvent::ParentFontChange< / tt > - Font of the parent widget changed.
< li > < tt > TQEvent::ApplicationFontChange< / tt > - Default application font changed.
< li > < tt > TQEvent::PaletteChange< / tt > - Palette of the widget changed.
< li > < tt > TQEvent::ParentPaletteChange< / tt > - Palette of the parent widget changed.
< li > < tt > TQEvent::ApplicationPaletteChange< / tt > - Default application palette changed.
< li > < tt > TQEvent::Clipboard< / tt > - Clipboard contents have changed.
< li > < tt > TQEvent::SockAct< / tt > - Socket activated, used to implement < a href = "ntqsocketnotifier.html" > TQSocketNotifier< / a > .
< li > < tt > TQEvent::DragEnter< / tt > - A drag-and-drop enters widget, < a href = "qdragenterevent.html" > TQDragEnterEvent< / a > .
< li > < tt > TQEvent::DragMove< / tt > - A drag-and-drop is in progress, < a href = "qdragmoveevent.html" > TQDragMoveEvent< / a > .
< li > < tt > TQEvent::DragLeave< / tt > - A drag-and-drop leaves widget, < a href = "qdragleaveevent.html" > TQDragLeaveEvent< / a > .
< li > < tt > TQEvent::Drop< / tt > - A drag-and-drop is completed, < a href = "qdropevent.html" > TQDropEvent< / a > .
< li > < tt > TQEvent::DragResponse< / tt > - Internal event used by TQt on some platforms.
< li > < tt > TQEvent::ChildInserted< / tt > - Object gets a child, < a href = "qchildevent.html" > TQChildEvent< / a > .
< li > < tt > TQEvent::ChildRemoved< / tt > - Object loses a child, < a href = "qchildevent.html" > TQChildEvent< / a > .
< li > < tt > TQEvent::LayoutHint< / tt > - Widget child has changed layout properties.
< li > < tt > TQEvent::ActivateControl< / tt > - Internal event used by TQt on some platforms.
< li > < tt > TQEvent::DeactivateControl< / tt > - Internal event used by TQt on some platforms.
< li > < tt > TQEvent::LanguageChange< / tt > - The application translation changed, < a href = "ntqtranslator.html" > TQTranslator< / a >
< li > < tt > TQEvent::LayoutDirectionChange< / tt > - The direction of layouts changed
< li > < tt > TQEvent::LocaleChange< / tt > - The system locale changed
< li > < tt > TQEvent::Quit< / tt > - Reserved.
< li > < tt > TQEvent::Create< / tt > - Reserved.
< li > < tt > TQEvent::Destroy< / tt > - Reserved.
< li > < tt > TQEvent::Reparent< / tt > - Reserved.
< li > < tt > TQEvent::Speech< / tt > - Reserved for speech input.
< li > < tt > TQEvent::TabletMove< / tt > - A Wacom Tablet Move Event.
< li > < tt > TQEvent::Style< / tt > - Internal use only
< li > < tt > TQEvent::TabletPress< / tt > - A Wacom Tablet Press Event
< li > < tt > TQEvent::TabletRelease< / tt > - A Wacom Tablet Release Event
< li > < tt > TQEvent::OkRequest< / tt > - Internal event used by TQt on some platforms.
< li > < tt > TQEvent::HelpRequest< / tt > - Internal event used by TQt on some platforms.
< li > < tt > TQEvent::IconDrag< / tt > - Internal event used by TQt on some platforms when proxy icon is dragged.
< li > < tt > TQEvent::WindowStateChange< / tt > - The window's state, i.e. minimized,
maximized or full-screen, has changed. See < a href = "ntqwidget.html#windowState" > TQWidget::windowState< / a > ().
< li > < tt > TQEvent::WindowBlocked< / tt > - The window is modally blocked
< li > < tt > TQEvent::WindowUnblocked< / tt > - The window leaves modal blocking
< li > < tt > TQEvent::User< / tt > - User defined event.
< li > < tt > TQEvent::MaxUser< / tt > - Last user event id.
< / ul > < p > User events should have values between User and MaxUser inclusive.
< hr > < h2 > Member Function Documentation< / h2 >
< h3 class = fn > < a name = "TQEvent" > < / a > TQEvent::TQEvent ( < a href = "ntqevent.html#Type-enum" > Type< / a > type )
< / h3 >
< p > Contructs an event object of type < em > type< / em > .
< h3 class = fn > < a name = "~TQEvent" > < / a > TQEvent::~TQEvent ()< tt > [virtual]< / tt >
< / h3 >
Destroys the event. If it was < a href = "ntqapplication.html#postEvent" > posted< / a > ,
it will be removed from the list of events to be posted.
< h3 class = fn > bool < a name = "spontaneous" > < / a > TQEvent::spontaneous () const
< / h3 >
< p > Returns TRUE if the event originated outside the application, i.e.
it is a system event; otherwise returns FALSE.
< h3 class = fn > < a href = "ntqevent.html#Type-enum" > Type< / a > < a name = "type" > < / a > TQEvent::type () const
< / h3 >
< p > Returns the event type.
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