docs/latex/wx/cmdevent.tex

   1 \section{\class{wxCommandEvent}}\label{wxcommandevent}
   2
   3 This event class contains information about command events, which originate from a variety of
   4 simple controls. More complex controls, such as \helpref{wxTreeCtrl}{wxtreectrl}, have separate command event classes.
   5
   6 \wxheading{Derived from}
   7
   8 \helpref{wxEvent}{wxevent}
   9
  10 \wxheading{Include files}
  11
  12 <wx/event.h>
  13
  14 \wxheading{Event table macros}
  15
  16 To process a menu command event, use these event handler macros to direct input to member
  17 functions that take a wxCommandEvent argument.
  18
  19 \twocolwidtha{7cm}
  20 \begin{twocollist}\itemsep=0pt
  21 \twocolitem{{\bf EVT\_COMMAND(id, event, func)}}{Process a command, supplying the window identifier,
  22 command event identifier, and member function.}
  23 \twocolitem{{\bf EVT\_COMMAND\_RANGE(id1, id2, event, func)}}{Process a command for a range
  24 of window identifiers, supplying the minimum and maximum window identifiers,
  25 command event identifier, and member function.}
  26 \twocolitem{{\bf EVT\_BUTTON(id, func)}}{Process a wxEVT\_COMMAND\_BUTTON\_CLICKED command,
  27 which is generated by a wxButton control.}
  28 \twocolitem{{\bf EVT\_CHECKBOX(id, func)}}{Process a wxEVT\_COMMAND\_CHECKBOX\_CLICKED command,
  29 which is generated by a wxCheckBox control.}
  30 \twocolitem{{\bf EVT\_CHOICE(id, func)}}{Process a wxEVT\_COMMAND\_CHOICE\_SELECTED command,
  31 which is generated by a wxChoice control.}
  32 \twocolitem{{\bf EVT\_COMBOBOX(id, func)}}{Process a wxEVT\_COMMAND\_COMBOBOX\_SELECTED command,
  33 which is generated by a wxComboBox control.}
  34 \twocolitem{{\bf EVT\_LISTBOX(id, func)}}{Process a wxEVT\_COMMAND\_LISTBOX\_SELECTED command,
  35 which is generated by a wxListBox control.}
  36 \twocolitem{{\bf EVT\_LISTBOX\_DCLICK(id, func)}}{Process a wxEVT\_COMMAND\_LISTBOX\_DOUBLECLICKED command,
  37 which is generated by a wxListBox control.}
  38 \twocolitem{{\bf EVT\_MENU(id, func)}}{Process a wxEVT\_COMMAND\_MENU\_SELECTED command,
  39 which is generated by a menu item.}
  40 \twocolitem{{\bf EVT\_MENU\_RANGE(id1, id2, func)}}{Process a wxEVT\_COMMAND\_MENU\_RANGE command,
  41 which is generated by a range of menu items.}
  42 \twocolitem{{\bf EVT\_CONTEXT\_MENU(func)}}{Process the event generated
  43 when the user has requested a popup menu to appear by pressing a special
  44 keyboard key (under Windows) or by right clicking the mouse.}
  45 \twocolitem{{\bf EVT\_RADIOBOX(id, func)}}{Process a wxEVT\_COMMAND\_RADIOBOX\_SELECTED command,
  46 which is generated by a wxRadioBox control.}
  47 \twocolitem{{\bf EVT\_RADIOBUTTON(id, func)}}{Process a wxEVT\_COMMAND\_RADIOBUTTON\_SELECTED command,
  48 which is generated by a wxRadioButton control.}
  49 \twocolitem{{\bf EVT\_SCROLLBAR(id, func)}}{Process a wxEVT\_COMMAND\_SCROLLBAR\_UPDATED command,
  50 which is generated by a wxScrollBar control. This is provided for compatibility only;
  51 more specific scrollbar event macros should be used instead (see \helpref{wxScrollEvent}{wxscrollevent}).}
  52 \twocolitem{{\bf EVT\_SLIDER(id, func)}}{Process a wxEVT\_COMMAND\_SLIDER\_UPDATED command,
  53 which is generated by a wxSlider control.}
  54 \twocolitem{{\bf EVT\_TEXT(id, func)}}{Process a wxEVT\_COMMAND\_TEXT\_UPDATED command,
  55 which is generated by a wxTextCtrl control.}
  56 \twocolitem{{\bf EVT\_TEXT\_ENTER(id, func)}}{Process a wxEVT\_COMMAND\_TEXT\_ENTER command,
  57 which is generated by a wxTextCtrl control. Note that you must use
  58 wxTE\_PROCESS\_ENTER flag when creating the control if you want it to generate
  59 such events.}
  60 \twocolitem{{\bf EVT\_TEXT\_MAXLEN(id, func)}}{Process a wxEVT\_COMMAND\_TEXT\_MAXLEN command,
  61 which is generated by a wxTextCtrl control when the user tries to enter more
  62 characters into it than the limit previously set with
  63 \helpref{SetMaxLength}{wxtextctrlsetmaxlength}.}
  64 \twocolitem{{\bf EVT\_TOGGLEBUTTON(id, func)}}{Process a wxEVT\_COMMAND\_TOGGLEBUTTON\_CLICKED event.}
  65 \twocolitem{{\bf EVT\_TOOL(id, func)}}{Process a wxEVT\_COMMAND\_TOOL\_CLICKED event
  66 (a synonym for wxEVT\_COMMAND\_MENU\_SELECTED). Pass the id of the tool.}
  67 \twocolitem{{\bf EVT\_TOOL\_RANGE(id1, id2, func)}}{Process a wxEVT\_COMMAND\_TOOL\_CLICKED event
  68 for a range of identifiers. Pass the ids of the tools.}
  69 \twocolitem{{\bf EVT\_TOOL\_RCLICKED(id, func)}}{Process a wxEVT\_COMMAND\_TOOL\_RCLICKED event.
  70 Pass the id of the tool.}
  71 \twocolitem{{\bf EVT\_TOOL\_RCLICKED\_RANGE(id1, id2, func)}}{Process a wxEVT\_COMMAND\_TOOL\_RCLICKED event
  72 for a range of ids. Pass the ids of the tools.}
  73 \twocolitem{{\bf EVT\_TOOL\_ENTER(id, func)}}{Process a wxEVT\_COMMAND\_TOOL\_ENTER event.
  74 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.}
  75 \twocolitem{{\bf EVT\_COMMAND\_LEFT\_CLICK(id, func)}}{Process a wxEVT\_COMMAND\_LEFT\_CLICK command,
  76 which is generated by a control (Windows 95 and NT only).}
  77 \twocolitem{{\bf EVT\_COMMAND\_LEFT\_DCLICK(id, func)}}{Process a wxEVT\_COMMAND\_LEFT\_DCLICK command,
  78 which is generated by a control (Windows 95 and NT only).}
  79 \twocolitem{{\bf EVT\_COMMAND\_RIGHT\_CLICK(id, func)}}{Process a wxEVT\_COMMAND\_RIGHT\_CLICK command,
  80 which is generated by a control (Windows 95 and NT only).}
  81 \twocolitem{{\bf EVT\_COMMAND\_SET\_FOCUS(id, func)}}{Process a wxEVT\_COMMAND\_SET\_FOCUS command,
  82 which is generated by a control (Windows 95 and NT only).}
  83 \twocolitem{{\bf EVT\_COMMAND\_KILL\_FOCUS(id, func)}}{Process a wxEVT\_COMMAND\_KILL\_FOCUS command,
  84 which is generated by a control (Windows 95 and NT only).}
  85 \twocolitem{{\bf EVT\_COMMAND\_ENTER(id, func)}}{Process a wxEVT\_COMMAND\_ENTER command,
  86 which is generated by a control.}
  87 \end{twocollist}%
  88
  89 \latexignore{\rtfignore{\wxheading{Members}}}
  90
  91 \membersection{wxCommandEvent::wxCommandEvent}\label{wxcommandeventctor}
  92
  93 \func{}{wxCommandEvent}{\param{WXTYPE}{ commandEventType = 0}, \param{int}{ id = 0}}
  94
  95 Constructor.
  96
  97 \membersection{wxCommandEvent::Checked}\label{wxcommandeventchecked}
  98
  99 \constfunc{bool}{Checked}{\void}
 100
 101 Deprecated, use \helpref{IsChecked}{wxcommandeventischecked} instead.
 102
 103 \membersection{wxCommandEvent::GetClientData}\label{wxcommandeventgetclientdata}
 104
 105 \func{void*}{GetClientData}{\void}
 106
 107 Returns client data pointer for a listbox or choice selection event
 108 (not valid for a deselection).
 109
 110 \membersection{wxCommandEvent::GetClientObject}\label{wxcommandeventgetclientobject}
 111
 112 \func{wxClientData *}{GetClientObject}{\void}
 113
 114 Returns client object pointer for a listbox or choice selection event
 115 (not valid for a deselection).
 116
 117 \membersection{wxCommandEvent::GetExtraLong}\label{wxcommandeventgetextralong}
 118
 119 \func{long}{GetExtraLong}{\void}
 120
 121 Returns extra information dependant on the event objects type.
 122 If the event comes from a listbox selection, it is a boolean
 123 determining whether the event was a selection (true) or a
 124 deselection (false). A listbox deselection only occurs for
 125 multiple-selection boxes, and in this case the index and string values
 126 are indeterminate and the listbox must be examined by the application.
 127
 128 \membersection{wxCommandEvent::GetInt}\label{wxcommandeventgetint}
 129
 130 \func{int}{GetInt}{\void}
 131
 132 Returns the integer identifier corresponding to a listbox, choice or
 133 radiobox selection (only if the event was a selection, not a
 134 deselection), or a boolean value representing the value of a checkbox.
 135
 136 \membersection{wxCommandEvent::GetSelection}\label{wxcommandeventgetselection}
 137
 138 \func{int}{GetSelection}{\void}
 139
 140 Returns item index for a listbox or choice selection event (not valid for
 141 a deselection).
 142
 143 \membersection{wxCommandEvent::GetString}\label{wxcommandeventgetstring}
 144
 145 \func{wxString}{GetString}{\void}
 146
 147 Returns item string for a listbox or choice selection event (not valid for
 148 a deselection).
 149
 150 \membersection{wxCommandEvent::IsChecked}\label{wxcommandeventischecked}
 151
 152 \constfunc{bool}{IsChecked}{\void}
 153
 154 This method can be used with checkbox and menu events: for the checkboxes, the
 155 method returns {\tt true} for a selection event and {\tt false} for a
 156 deselection one. For the menu events, this method indicates if the menu item
 157 just has become checked or unchecked (and thus only makes sense for checkable
 158 menu items).
 159
 160 \membersection{wxCommandEvent::IsSelection}\label{wxcommandeventisselection}
 161
 162 \func{bool}{IsSelection}{\void}
 163
 164 For a listbox or similar event, returns true if it is a selection, false if it
 165 is a deselection.
 166
 167 \membersection{wxCommandEvent::SetClientData}\label{wxcommandeventsetclientdata}
 168
 169 \func{void}{SetClientData}{\param{void*}{ clientData}}
 170
 171 Sets the client data for this event.
 172
 173 \membersection{wxCommandEvent::SetClientObject}\label{wxcommandeventsetclientobject}
 174
 175 \func{void}{SetClientObject}{\param{wxClientData*}{ clientObject}}
 176
 177 Sets the client object for this event. The client object is \emph{not} owned by the event
 178 object and the event object will not delete the client object in its destructor.
 179 The client object must be owned and deleted by another object (e.g. a control)
 180 that has longer life time than the event object.
 181
 182 \membersection{wxCommandEvent::SetExtraLong}\label{wxcommandeventsetextralong}
 183
 184 \func{void}{SetExtraLong}{\param{long}{ extraLong}}
 185
 186 Sets the {\bf m\_extraLong} member.
 187
 188 \membersection{wxCommandEvent::SetInt}\label{wxcommandeventsetint}
 189
 190 \func{void}{SetInt}{\param{int}{ intCommand}}
 191
 192 Sets the {\bf m\_commandInt} member.
 193
 194 \membersection{wxCommandEvent::SetString}\label{wxcommandeventsetstring}
 195
 196 \func{void}{SetString}{\param{const wxString\&}{ string}}
 197
 198 Sets the {\bf m\_commandString} member.
 199