wxWidgets/docs/latex/wx/cmdevent.tex

\section{\class{wxCommandEvent}}\label{wxcommandevent}

This event class contains information about command events, which originate from a variety of
simple controls. More complex controls, such as \helpref{wxTreeCtrl}{wxtreectrl}, have separate command event classes.

\wxheading{Derived from}

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

\wxheading{Include files}

<wx/event.h>

\wxheading{Library}

\helpref{wxCore}{librarieslist}

\wxheading{Event table macros}

To process a menu command event, use these event handler macros to direct input to member
functions that take a wxCommandEvent argument.

\twocolwidtha{7cm}
\begin{twocollist}\itemsep=0pt
\twocolitem{{\bf EVT\_COMMAND(id, event, func)}}{Process a command, supplying the window identifier,
command event identifier, and member function.}
\twocolitem{{\bf EVT\_COMMAND\_RANGE(id1, id2, event, func)}}{Process a command for a range
of window identifiers, supplying the minimum and maximum window identifiers,
command event identifier, and member function.}
\twocolitem{{\bf EVT\_BUTTON(id, func)}}{Process a wxEVT\_COMMAND\_BUTTON\_CLICKED command,
which is generated by a wxButton control.}
\twocolitem{{\bf EVT\_CHECKBOX(id, func)}}{Process a wxEVT\_COMMAND\_CHECKBOX\_CLICKED command,
which is generated by a wxCheckBox control.}
\twocolitem{{\bf EVT\_CHOICE(id, func)}}{Process a wxEVT\_COMMAND\_CHOICE\_SELECTED command,
which is generated by a wxChoice control.}
\twocolitem{{\bf EVT\_COMBOBOX(id, func)}}{Process a wxEVT\_COMMAND\_COMBOBOX\_SELECTED command,
which is generated by a wxComboBox control.}
\twocolitem{{\bf EVT\_LISTBOX(id, func)}}{Process a wxEVT\_COMMAND\_LISTBOX\_SELECTED command,
which is generated by a wxListBox control.}
\twocolitem{{\bf EVT\_LISTBOX\_DCLICK(id, func)}}{Process a wxEVT\_COMMAND\_LISTBOX\_DOUBLECLICKED command,
which is generated by a wxListBox control.}
\twocolitem{{\bf EVT\_MENU(id, func)}}{Process a wxEVT\_COMMAND\_MENU\_SELECTED command,
which is generated by a menu item.}
\twocolitem{{\bf EVT\_MENU\_RANGE(id1, id2, func)}}{Process a wxEVT\_COMMAND\_MENU\_RANGE command,
which is generated by a range of menu items.}
\twocolitem{{\bf EVT\_CONTEXT\_MENU(func)}}{Process the event generated
when the user has requested a popup menu to appear by pressing a special
keyboard key (under Windows) or by right clicking the mouse.}
\twocolitem{{\bf EVT\_RADIOBOX(id, func)}}{Process a wxEVT\_COMMAND\_RADIOBOX\_SELECTED command,
which is generated by a wxRadioBox control.}
\twocolitem{{\bf EVT\_RADIOBUTTON(id, func)}}{Process a wxEVT\_COMMAND\_RADIOBUTTON\_SELECTED command,
which is generated by a wxRadioButton control.}
\twocolitem{{\bf EVT\_SCROLLBAR(id, func)}}{Process a wxEVT\_COMMAND\_SCROLLBAR\_UPDATED command,
which is generated by a wxScrollBar control. This is provided for compatibility only;
more specific scrollbar event macros should be used instead (see \helpref{wxScrollEvent}{wxscrollevent}).}
\twocolitem{{\bf EVT\_SLIDER(id, func)}}{Process a wxEVT\_COMMAND\_SLIDER\_UPDATED command,
which is generated by a wxSlider control.}
\twocolitem{{\bf EVT\_TEXT(id, func)}}{Process a wxEVT\_COMMAND\_TEXT\_UPDATED command,
which is generated by a wxTextCtrl control.}
\twocolitem{{\bf EVT\_TEXT\_ENTER(id, func)}}{Process a wxEVT\_COMMAND\_TEXT\_ENTER command,
which is generated by a wxTextCtrl control. Note that you must use
wxTE\_PROCESS\_ENTER flag when creating the control if you want it to generate
such events.}
\twocolitem{{\bf EVT\_TEXT\_MAXLEN(id, func)}}{Process a wxEVT\_COMMAND\_TEXT\_MAXLEN command,
which is generated by a wxTextCtrl control when the user tries to enter more
characters into it than the limit previously set with 
\helpref{SetMaxLength}{wxtextctrlsetmaxlength}.}
\twocolitem{{\bf EVT\_TOGGLEBUTTON(id, func)}}{Process a wxEVT\_COMMAND\_TOGGLEBUTTON\_CLICKED event.}
\twocolitem{{\bf EVT\_TOOL(id, func)}}{Process a wxEVT\_COMMAND\_TOOL\_CLICKED event
(a synonym for wxEVT\_COMMAND\_MENU\_SELECTED). Pass the id of the tool.}
\twocolitem{{\bf EVT\_TOOL\_RANGE(id1, id2, func)}}{Process a wxEVT\_COMMAND\_TOOL\_CLICKED event
for a range of identifiers. Pass the ids of the tools.}
\twocolitem{{\bf EVT\_TOOL\_RCLICKED(id, func)}}{Process a wxEVT\_COMMAND\_TOOL\_RCLICKED event.
Pass the id of the tool.}
\twocolitem{{\bf EVT\_TOOL\_RCLICKED\_RANGE(id1, id2, func)}}{Process a wxEVT\_COMMAND\_TOOL\_RCLICKED event
for a range of ids. Pass the ids of the tools.}
\twocolitem{{\bf EVT\_TOOL\_ENTER(id, func)}}{Process a wxEVT\_COMMAND\_TOOL\_ENTER event.
Pass the id of the toolbar itself. The value of wxCommandEvent::GetSelection is the tool id, or -1 if the mouse cursor has moved off a tool.}
\twocolitem{{\bf EVT\_COMMAND\_LEFT\_CLICK(id, func)}}{Process a wxEVT\_COMMAND\_LEFT\_CLICK command,
which is generated by a control (Windows 95 and NT only).}
\twocolitem{{\bf EVT\_COMMAND\_LEFT\_DCLICK(id, func)}}{Process a wxEVT\_COMMAND\_LEFT\_DCLICK command,
which is generated by a control (Windows 95 and NT only).}
\twocolitem{{\bf EVT\_COMMAND\_RIGHT\_CLICK(id, func)}}{Process a wxEVT\_COMMAND\_RIGHT\_CLICK command,
which is generated by a control (Windows 95 and NT only).}
\twocolitem{{\bf EVT\_COMMAND\_SET\_FOCUS(id, func)}}{Process a wxEVT\_COMMAND\_SET\_FOCUS command,
which is generated by a control (Windows 95 and NT only).}
\twocolitem{{\bf EVT\_COMMAND\_KILL\_FOCUS(id, func)}}{Process a wxEVT\_COMMAND\_KILL\_FOCUS command,
which is generated by a control (Windows 95 and NT only).}
\twocolitem{{\bf EVT\_COMMAND\_ENTER(id, func)}}{Process a wxEVT\_COMMAND\_ENTER command,
which is generated by a control.}
\end{twocollist}%

\latexignore{\rtfignore{\wxheading{Members}}}

\membersection{wxCommandEvent::wxCommandEvent}\label{wxcommandeventctor}

\func{}{wxCommandEvent}{\param{WXTYPE}{ commandEventType = 0}, \param{int}{ id = 0}}

Constructor.

\membersection{wxCommandEvent::Checked}\label{wxcommandeventchecked}

\constfunc{bool}{Checked}{\void}

Deprecated, use \helpref{IsChecked}{wxcommandeventischecked} instead.

\membersection{wxCommandEvent::GetClientData}\label{wxcommandeventgetclientdata}

\func{void*}{GetClientData}{\void}

Returns client data pointer for a listbox or choice selection event
(not valid for a deselection).

\membersection{wxCommandEvent::GetClientObject}\label{wxcommandeventgetclientobject}

\func{wxClientData *}{GetClientObject}{\void}

Returns client object pointer for a listbox or choice selection event
(not valid for a deselection).

\membersection{wxCommandEvent::GetExtraLong}\label{wxcommandeventgetextralong}

\func{long}{GetExtraLong}{\void}

Returns extra information dependant on the event objects type.
If the event comes from a listbox selection, it is a boolean
determining whether the event was a selection (true) or a
deselection (false). A listbox deselection only occurs for
multiple-selection boxes, and in this case the index and string values
are indeterminate and the listbox must be examined by the application.

\membersection{wxCommandEvent::GetInt}\label{wxcommandeventgetint}

\func{int}{GetInt}{\void}

Returns the integer identifier corresponding to a listbox, choice or
radiobox selection (only if the event was a selection, not a
deselection), or a boolean value representing the value of a checkbox.

\membersection{wxCommandEvent::GetSelection}\label{wxcommandeventgetselection}

\func{int}{GetSelection}{\void}

Returns item index for a listbox or choice selection event (not valid for
a deselection).

\membersection{wxCommandEvent::GetString}\label{wxcommandeventgetstring}

\func{wxString}{GetString}{\void}

Returns item string for a listbox or choice selection event (not valid for
a deselection).

\membersection{wxCommandEvent::IsChecked}\label{wxcommandeventischecked}

\constfunc{bool}{IsChecked}{\void}

This method can be used with checkbox and menu events: for the checkboxes, the
method returns {\tt true} for a selection event and {\tt false} for a
deselection one. For the menu events, this method indicates if the menu item
just has become checked or unchecked (and thus only makes sense for checkable
menu items).

Notice that this method can \emph{not} be used with 
\helpref{wxCheckListBox}{wxchecklistbox} currently.


\membersection{wxCommandEvent::IsSelection}\label{wxcommandeventisselection}

\func{bool}{IsSelection}{\void}

For a listbox or similar event, returns true if it is a selection, false if it
is a deselection.

\membersection{wxCommandEvent::SetClientData}\label{wxcommandeventsetclientdata}

\func{void}{SetClientData}{\param{void*}{ clientData}}

Sets the client data for this event.

\membersection{wxCommandEvent::SetClientObject}\label{wxcommandeventsetclientobject}

\func{void}{SetClientObject}{\param{wxClientData*}{ clientObject}}

Sets the client object for this event. The client object is \emph{not} owned by the event
object and the event object will not delete the client object in its destructor.
The client object must be owned and deleted by another object (e.g. a control)
that has longer life time than the event object.

\membersection{wxCommandEvent::SetExtraLong}\label{wxcommandeventsetextralong}

\func{void}{SetExtraLong}{\param{long}{ extraLong}}

Sets the {\bf m\_extraLong} member.

\membersection{wxCommandEvent::SetInt}\label{wxcommandeventsetint}

\func{void}{SetInt}{\param{int}{ intCommand}}

Sets the {\bf m\_commandInt} member.

\membersection{wxCommandEvent::SetString}\label{wxcommandeventsetstring}

\func{void}{SetString}{\param{const wxString\&}{ string}}

Sets the {\bf m\_commandString} member.