documentation for window ids allocation and wxIdManager (patch 1870570)

[wxWidgets.git] / docs / latex / wx / keyevent.tex

diff --git a/docs/latex/wx/keyevent.tex b/docs/latex/wx/keyevent.tex
index a76d181b19d64670a4e331ae3bd1449088d28b24..1366c835a6f5e2e76377fefab379585c65437661 100644 (file)
--- a/docs/latex/wx/keyevent.tex
+++ b/docs/latex/wx/keyevent.tex
@@ -28,7 +28,7 @@ as well.
 Although in this simple case it is clear that the correct key code could be
 found in the key down event handler by checking the value returned by
 \helpref{ShiftDown()}{wxkeyeventshiftdown}, in general you should use
 Although in this simple case it is clear that the correct key code could be
 found in the key down event handler by checking the value returned by
 \helpref{ShiftDown()}{wxkeyeventshiftdown}, in general you should use

-{\tt EVT\_CHAR} for this as for non alphanumeric keys the translation is
+{\tt EVT\_CHAR} for this as for non-alphanumeric keys the translation is

 keyboard-layout dependent and can only be done properly by the system itself.
 
 Another kind of translation is done when the control key is pressed: for
 keyboard-layout dependent and can only be done properly by the system itself.
 
 Another kind of translation is done when the control key is pressed: for


@@ -41,7 +41,7 @@ running the \helpref{text}{sampletext} wxWidgets sample and pressing some keys
 in any of the text controls shown in it.
 
 {\bf Note:} If a key down ({\tt EVT\_KEY\_DOWN}) event is caught and
 in any of the text controls shown in it.
 
 {\bf Note:} If a key down ({\tt EVT\_KEY\_DOWN}) event is caught and

-the event handler does not call {\tt event.Skip()} then the coresponding
+the event handler does not call {\tt event.Skip()} then the corresponding

 char event ({\tt EVT\_CHAR}) will not happen.  This is by design and
 enables the programs that handle both types of events to be a bit
 simpler.
 char event ({\tt EVT\_CHAR}) will not happen.  This is by design and
 enables the programs that handle both types of events to be a bit
 simpler.


@@ -56,12 +56,17 @@ key event function, otherwise menu shortcuts may cease to work under Windows.
 
 \wxheading{Derived from}
 
 
 \wxheading{Derived from}
 

-\helpref{wxEvent}{wxevent}
+\helpref{wxEvent}{wxevent}\\
+\helpref{wxObject}{wxobject}

 
 \wxheading{Include files}
 
 <wx/event.h>
 
 
 \wxheading{Include files}
 
 <wx/event.h>
 

+\wxheading{Library}
+
+\helpref{wxCore}{librarieslist}
+

 \wxheading{Event table macros}
 
 To process a key event, use these event handler macros to direct input to member
 \wxheading{Event table macros}
 
 To process a key event, use these event handler macros to direct input to member


@@ -79,80 +84,102 @@ functions that take a wxKeyEvent argument.
 \latexignore{\rtfignore{\wxheading{Members}}}
 
 
 \latexignore{\rtfignore{\wxheading{Members}}}
 
 

-\membersection{wxKeyEvent::m\_altDown}
+\membersection{wxKeyEvent::m\_altDown}\label{wxkeyeventmaltdown}

 
 \member{bool}{m\_altDown}
 
 
 \member{bool}{m\_altDown}
 

+\textbf{Deprecated: } Please use \helpref{GetModifiers}{wxkeyeventgetmodifiers}
+instead!
+

 true if the Alt key is pressed down.
 
 
 true if the Alt key is pressed down.
 
 

-\membersection{wxKeyEvent::m\_controlDown}
+\membersection{wxKeyEvent::m\_controlDown}\label{wxkeyeventmcontroldown}

 
 \member{bool}{m\_controlDown}
 
 
 \member{bool}{m\_controlDown}
 

+\textbf{Deprecated: } Please use \helpref{GetModifiers}{wxkeyeventgetmodifiers}
+instead!
+

 true if control is pressed down.
 
 
 true if control is pressed down.
 
 

-\membersection{wxKeyEvent::m\_keyCode}
+\membersection{wxKeyEvent::m\_keyCode}\label{wxkeyeventmkeycode}

 
 \member{long}{m\_keyCode}
 
 
 \member{long}{m\_keyCode}
 

+\textbf{Deprecated: } Please use \helpref{GetKeyCode}{wxkeyeventgetkeycode}
+instead!
+

 Virtual keycode. See \helpref{Keycodes}{keycodes} for a list of identifiers.
 
 
 Virtual keycode. See \helpref{Keycodes}{keycodes} for a list of identifiers.
 
 

-\membersection{wxKeyEvent::m\_metaDown}
+\membersection{wxKeyEvent::m\_metaDown}\label{wxkeyeventmmetadown}

 
 \member{bool}{m\_metaDown}
 
 
 \member{bool}{m\_metaDown}
 

+\textbf{Deprecated: } Please use \helpref{GetModifiers}{wxkeyeventgetmodifiers}
+instead!
+

 true if the Meta key is pressed down.
 
 
 true if the Meta key is pressed down.
 
 

-\membersection{wxKeyEvent::m\_shiftDown}
+\membersection{wxKeyEvent::m\_shiftDown}\label{wxkeyeventmshiftdown}

 
 \member{bool}{m\_shiftDown}
 
 
 \member{bool}{m\_shiftDown}
 

+\textbf{Deprecated: } Please use \helpref{GetModifiers}{wxkeyeventgetmodifiers}
+instead!
+

 true if shift is pressed down.
 
 
 true if shift is pressed down.
 
 

-\membersection{wxKeyEvent::m\_x}
+\membersection{wxKeyEvent::m\_x}\label{wxkeyeventmx}

 
 \member{int}{m\_x}
 
 
 \member{int}{m\_x}
 

+\textbf{Deprecated: } Please use \helpref{GetX}{wxkeyeventgetx} instead!
+

 X position of the event.
 
 
 X position of the event.
 
 

-\membersection{wxKeyEvent::m\_y}
+\membersection{wxKeyEvent::m\_y}\label{wxkeyeventmy}

 
 \member{int}{m\_y}
 
 
 \member{int}{m\_y}
 

+\textbf{Deprecated: } Please use \helpref{GetY}{wxkeyeventgety} instead!
+

 Y position of the event.
 
 
 Y position of the event.
 
 

-\membersection{wxKeyEvent::wxKeyEvent}
+\membersection{wxKeyEvent::wxKeyEvent}\label{wxkeyeventctor}

 
 \func{}{wxKeyEvent}{\param{WXTYPE}{ keyEventType}}
 
 Constructor. Currently, the only valid event types are wxEVT\_CHAR and wxEVT\_CHAR\_HOOK.
 
 
 
 \func{}{wxKeyEvent}{\param{WXTYPE}{ keyEventType}}
 
 Constructor. Currently, the only valid event types are wxEVT\_CHAR and wxEVT\_CHAR\_HOOK.
 
 

-\membersection{wxKeyEvent::AltDown}
+\membersection{wxKeyEvent::AltDown}\label{wxkeyeventaltdown}

 
 \constfunc{bool}{AltDown}{\void}
 
 Returns true if the Alt key was down at the time of the key event.
 
 
 \constfunc{bool}{AltDown}{\void}
 
 Returns true if the Alt key was down at the time of the key event.
 

+Notice that \helpref{GetModifiers}{wxkeyeventgetmodifiers} is easier to use
+correctly than this function so you should consider using it in new code.
+

 
 \membersection{wxKeyEvent::CmdDown}\label{wxkeyeventcmddown}
 
 \constfunc{bool}{CmdDown}{\void}
 
 
 \membersection{wxKeyEvent::CmdDown}\label{wxkeyeventcmddown}
 
 \constfunc{bool}{CmdDown}{\void}
 

-"Cmd" is a pseudo key which is the same as Control for PC and Unix platforms
-but the special "Apple" (a.k.a as "Command") key under Macs: it makes often
-sense to use it instead of, say, ControlDown() because Cmd key is used for the
-same thing under Mac as Ctrl elsewhere (but Ctrl still exists, just not used
-for this purpose under Mac). So for non-Mac platforms this is the same as 
-\helpref{ControlDown()}{wxkeyeventcontroldown} and under Mac this is the same
-as \helpref{MetaDown()}{wxkeyeventmetadown}.
+\textsc{Cmd} is a pseudo key which is the same as Control for PC and Unix
+platforms but the special \textsc{Apple} (a.k.a as \textsc{Command}) key under
+Macs: it makes often sense to use it instead of, say, ControlDown() because Cmd
+key is used for the same thing under Mac as Ctrl elsewhere (but Ctrl still
+exists, just not used for this purpose under Mac). So for non-Mac platforms
+this is the same as \helpref{ControlDown()}{wxkeyeventcontroldown} and under
+Mac this is the same as \helpref{MetaDown()}{wxkeyeventmetadown}.

 
 
 \membersection{wxKeyEvent::ControlDown}\label{wxkeyeventcontroldown}
 
 
 \membersection{wxKeyEvent::ControlDown}\label{wxkeyeventcontroldown}


@@ -161,17 +188,56 @@ as \helpref{MetaDown()}{wxkeyeventmetadown}.
 
 Returns true if the control key was down at the time of the key event.
 
 
 Returns true if the control key was down at the time of the key event.
 

+Notice that \helpref{GetModifiers}{wxkeyeventgetmodifiers} is easier to use
+correctly than this function so you should consider using it in new code.
+

 
 

-\membersection{wxKeyEvent::GetKeyCode}
+\membersection{wxKeyEvent::GetKeyCode}\label{wxkeyeventgetkeycode}

 
 \constfunc{int}{GetKeyCode}{\void}
 
 Returns the virtual key code. ASCII events return normal ASCII values,
 while non-ASCII events return values such as {\bf WXK\_LEFT} for the
 
 \constfunc{int}{GetKeyCode}{\void}
 
 Returns the virtual key code. ASCII events return normal ASCII values,
 while non-ASCII events return values such as {\bf WXK\_LEFT} for the

-left cursor key. See \helpref{Keycodes}{keycodes} for a full list of the virtual key codes.
+left cursor key. See \helpref{Keycodes}{keycodes} for a full list of
+the virtual key codes.
+
+Note that in Unicode build, the returned value is meaningful only if the
+user entered a character that can be represented in current locale's default
+charset. You can obtain the corresponding Unicode character using
+\helpref{GetUnicodeKey}{wxkeyeventgetunicodekey}.

 
 
 
 

-\membersection{wxKeyEvent::GetPosition}
+\membersection{wxKeyEvent::GetModifiers}\label{wxkeyeventgetmodifiers}
+
+\constfunc{int}{GetModifiers}{\void}
+
+Return the bitmask of modifier keys which were pressed when this event
+happened. See \helpref{key modifier constants}{keymodifiers} for the full list
+of modifiers.
+
+Notice that this function is easier to use correctly than, for example, 
+\helpref{ControlDown}{wxkeyeventcontroldown} because when using the latter you
+also have to remember to test that none of the other modifiers is pressed:
+
+\begin{verbatim}
+    if ( ControlDown() && !AltDown() && !ShiftDown() && !MetaDown() )
+        ... handle Ctrl-XXX ...
+\end{verbatim}
+
+and forgetting to do it can result in serious program bugs (e.g. program not
+working with European keyboard layout where \textsc{AltGr} key which is seen by
+the program as combination of \textsc{Ctrl} and \textsc{Alt} is used). On the
+other hand, you can simply write
+
+\begin{verbatim}
+    if ( GetModifiers() == wxMOD_CONTROL )
+        ... handle Ctrl-XXX ...
+\end{verbatim}
+
+with this function.
+
+
+\membersection{wxKeyEvent::GetPosition}\label{wxkeyeventgetposition}

 
 \constfunc{wxPoint}{GetPosition}{\void}
 
 
 \constfunc{wxPoint}{GetPosition}{\void}
 


@@ -180,7 +246,7 @@ left cursor key. See \helpref{Keycodes}{keycodes} for a full list of the virtual
 Obtains the position (in client coordinates) at which the key was pressed.
 
 
 Obtains the position (in client coordinates) at which the key was pressed.
 
 

-\membersection{wxKeyEvent::GetRawKeyCode}
+\membersection{wxKeyEvent::GetRawKeyCode}\label{wxkeyeventgetrawkeycode}

 
 \constfunc{wxUint32}{GetRawKeyCode}{\void}
 
 
 \constfunc{wxUint32}{GetRawKeyCode}{\void}
 


@@ -191,7 +257,7 @@ which should only be used in advanced applications.
 {\tt\#ifdef wxHAS\_RAW\_KEY\_CODES} to determine if this feature is available.
 
 
 {\tt\#ifdef wxHAS\_RAW\_KEY\_CODES} to determine if this feature is available.
 
 

-\membersection{wxKeyEvent::GetRawKeyFlags}
+\membersection{wxKeyEvent::GetRawKeyFlags}\label{wxkeyeventgetrawkeyflags}

 
 \constfunc{wxUint32}{GetRawKeyFlags}{\void}
 
 
 \constfunc{wxUint32}{GetRawKeyFlags}{\void}
 


@@ -202,7 +268,7 @@ platform-dependent and should only be used in advanced applications.
 {\tt \#ifdef wxHAS\_RAW\_KEY\_CODES} to determine if this feature is available.
 
 
 {\tt \#ifdef wxHAS\_RAW\_KEY\_CODES} to determine if this feature is available.
 
 

-\membersection{wxKeyEvent::GetUnicodeKey}
+\membersection{wxKeyEvent::GetUnicodeKey}\label{wxkeyeventgetunicodekey}

 
 \constfunc{wxChar}{GetUnicodeKey}{\void}
 
 
 \constfunc{wxChar}{GetUnicodeKey}{\void}
 


@@ -212,21 +278,21 @@ This function is only available in Unicode build, i.e. when
 \texttt{wxUSE\_UNICODE} is $1$.
 
 
 \texttt{wxUSE\_UNICODE} is $1$.
 
 

-\membersection{wxKeyEvent::GetX}
+\membersection{wxKeyEvent::GetX}\label{wxkeyeventgetx}

 
 \constfunc{long}{GetX}{\void}
 
 Returns the X position (in client coordinates) of the event.
 
 
 
 \constfunc{long}{GetX}{\void}
 
 Returns the X position (in client coordinates) of the event.
 
 

-\membersection{wxKeyEvent::GetY}
+\membersection{wxKeyEvent::GetY}\label{wxkeyeventgety}

 
 \constfunc{long}{GetY}{\void}
 
 Returns the Y (in client coordinates) position of the event.
 
 
 
 \constfunc{long}{GetY}{\void}
 
 Returns the Y (in client coordinates) position of the event.
 
 

-\membersection{wxKeyEvent::HasModifiers}
+\membersection{wxKeyEvent::HasModifiers}\label{wxkeyeventhasmodifiers}

 
 \constfunc{bool}{HasModifiers}{\void}
 
 
 \constfunc{bool}{HasModifiers}{\void}
 


@@ -244,6 +310,9 @@ be still processed normally).
 
 Returns true if the Meta key was down at the time of the key event.
 
 
 Returns true if the Meta key was down at the time of the key event.
 

+Notice that \helpref{GetModifiers}{wxkeyeventgetmodifiers} is easier to use
+correctly than this function so you should consider using it in new code.
+

 
 \membersection{wxKeyEvent::ShiftDown}\label{wxkeyeventshiftdown}
 
 
 \membersection{wxKeyEvent::ShiftDown}\label{wxkeyeventshiftdown}
 


@@ -251,3 +320,6 @@ Returns true if the Meta key was down at the time of the key event.
 
 Returns true if the shift key was down at the time of the key event.
 
 
 Returns true if the shift key was down at the time of the key event.
 

+Notice that \helpref{GetModifiers}{wxkeyeventgetmodifiers} is easier to use
+correctly than this function so you should consider using it in new code.
+