docs/latex/wx/combobox.tex

   1 \section{\class{wxComboBox}}\label{wxcombobox}
   2
   3 A combobox is like a combination of an edit control and a listbox. It can be
   4 displayed as static list with editable or read-only text field; or a drop-down list with
   5 text field; or a drop-down list without a text field.
   6
   7 A combobox permits a single selection only. Combobox items are numbered from zero.
   8
   9 \wxheading{Derived from}
  10
  11 \helpref{wxControlWithItems}{wxcontrolwithitems}\\
  12 \helpref{wxControl}{wxcontrol}\\
  13 \helpref{wxWindow}{wxwindow}\\
  14 \helpref{wxEvtHandler}{wxevthandler}\\
  15 \helpref{wxObject}{wxobject}
  16
  17 \wxheading{Include files}
  18
  19 <wx/combobox.h>
  20
  21 \wxheading{Window styles}
  22
  23 \begin{twocollist}\itemsep=0pt
  24 \twocolitem{\windowstyle{wxCB\_SIMPLE}}{Creates a combobox with a permanently displayed list. Windows only. }
  25 \twocolitem{\windowstyle{wxCB\_DROPDOWN}}{Creates a combobox with a drop-down list.}
  26 \twocolitem{\windowstyle{wxCB\_READONLY}}{Same as wxCB\_DROPDOWN but only the
  27 strings specified as the combobox choices can be selected, it is impossible to
  28 select (even from a program) a string which is not in the choices list.}
  29 \twocolitem{\windowstyle{wxCB\_SORT}}{Sorts the entries in the list alphabetically.}
  30 \end{twocollist}
  31
  32 See also \helpref{window styles overview}{windowstyles}.
  33
  34 \wxheading{Event handling}
  35
  36 \twocolwidtha{7cm}
  37 \begin{twocollist}\itemsep=0pt
  38 \twocolitem{{\bf EVT\_COMBOBOX(id, func)}}{Process a wxEVT\_COMMAND\_COMBOBOX\_SELECTED event,
  39 when an item on the list is selected.}
  40 \twocolitem{{\bf EVT\_TEXT(id, func)}}{Process a wxEVT\_COMMAND\_TEXT\_UPDATED event,
  41 when the combobox text changes.}
  42 \end{twocollist}
  43
  44 \wxheading{See also}
  45
  46 \helpref{wxListBox}{wxlistbox}, \helpref{wxTextCtrl}{wxtextctrl}, \helpref{wxChoice}{wxchoice},
  47 \rtfsp\helpref{wxCommandEvent}{wxcommandevent}
  48
  49 \latexignore{\rtfignore{\wxheading{Members}}}
  50
  51 \membersection{wxComboBox::wxComboBox}\label{wxcomboboxconstr}
  52
  53 \func{}{wxComboBox}{\void}
  54
  55 Default constructor.
  56
  57 \func{}{wxComboBox}{\param{wxWindow*}{ parent}, \param{wxWindowID}{ id},\rtfsp
  58 \param{const wxString\& }{value = ``"}, \param{const wxPoint\&}{ pos = wxDefaultPosition}, \param{const wxSize\&}{ size = wxDefaultSize},\rtfsp
  59 \param{int}{ n}, \param{const wxString }{choices[]},\rtfsp
  60 \param{long}{ style = 0}, \param{const wxValidator\& }{validator = wxDefaultValidator}, \param{const wxString\& }{name = ``comboBox"}}
  61
  62 Constructor, creating and showing a combobox.
  63
  64 \wxheading{Parameters}
  65
  66 \docparam{parent}{Parent window. Must not be NULL.}
  67
  68 \docparam{id}{Window identifier. A value of -1 indicates a default value.}
  69
  70 \docparam{value}{Initial selection string. An empty string indicates no selection.}
  71
  72 \docparam{pos}{Window position.}
  73
  74 \docparam{size}{Window size. If the default size (-1, -1) is specified then the window is sized
  75 appropriately.}
  76
  77 \docparam{n}{Number of strings with which to initialise the control.}
  78
  79 \docparam{choices}{An array of strings with which to initialise the control.}
  80
  81 \docparam{style}{Window style. See \helpref{wxComboBox}{wxcombobox}.}
  82
  83 \docparam{validator}{Window validator.}
  84
  85 \docparam{name}{Window name.}
  86
  87 \wxheading{See also}
  88
  89 \helpref{wxComboBox::Create}{wxcomboboxcreate}, \helpref{wxValidator}{wxvalidator}
  90
  91 \pythonnote{The wxComboBox constructor in wxPython reduces the {\tt n}
  92 and {\tt choices} arguments are to a single argument, which is
  93 a list of strings.}
  94
  95 \perlnote{In wxPerl there is just an array reference in place of {\tt n}
  96 and {\tt choices}.}
  97
  98 \membersection{wxComboBox::\destruct{wxComboBox}}
  99
 100 \func{}{\destruct{wxComboBox}}{\void}
 101
 102 Destructor, destroying the combobox.
 103
 104 \membersection{wxComboBox::Create}\label{wxcomboboxcreate}
 105
 106 \func{bool}{Create}{\param{wxWindow*}{ parent}, \param{wxWindowID}{ id},\rtfsp
 107 \param{const wxString\& }{value = ``"}, \param{const wxPoint\&}{ pos = wxDefaultPosition}, \param{const wxSize\&}{ size = wxDefaultSize},\rtfsp
 108 \param{int}{ n}, \param{const wxString }{choices[]},\rtfsp
 109 \param{long}{ style = 0}, \param{const wxValidator\& }{validator = wxDefaultValidator}, \param{const wxString\& }{name = ``comboBox"}}
 110
 111 Creates the combobox for two-step construction. Derived classes
 112 should call or replace this function. See \helpref{wxComboBox::wxComboBox}{wxcomboboxconstr}\rtfsp
 113 for further details.
 114
 115 \membersection{wxComboBox::Copy}\label{wxcomboboxcopy}
 116
 117 \func{void}{Copy}{\void}
 118
 119 Copies the selected text to the clipboard.
 120
 121 \membersection{wxComboBox::Cut}\label{wxcomboboxcut}
 122
 123 \func{void}{Cut}{\void}
 124
 125 Copies the selected text to the clipboard and removes the selection.
 126
 127 \membersection{wxComboBox::GetInsertionPoint}\label{wxcomboboxgetinsertionpoint}
 128
 129 \constfunc{long}{GetInsertionPoint}{\void}
 130
 131 Returns the insertion point for the combobox's text field.
 132
 133 \membersection{wxComboBox::GetLastPosition}\label{wxcomboboxgetlastposition}
 134
 135 \constfunc{long}{GetLastPosition}{\void}
 136
 137 Returns the last position in the combobox text field.
 138
 139 \membersection{wxComboBox::GetValue}\label{wxcomboboxgetvalue}
 140
 141 \constfunc{wxString}{GetValue}{\void}
 142
 143 Returns the current value in the combobox text field.
 144
 145 \membersection{wxComboBox::Paste}\label{wxcomboboxpaste}
 146
 147 \func{void}{Paste}{\void}
 148
 149 Pastes text from the clipboard to the text field.
 150
 151 \membersection{wxComboBox::Replace}\label{wxcomboboxreplace}
 152
 153 \func{void}{Replace}{\param{long}{ from}, \param{long}{ to}, \param{const wxString\& }{text}}
 154
 155 Replaces the text between two positions with the given text, in the combobox text field.
 156
 157 \wxheading{Parameters}
 158
 159 \docparam{from}{The first position.}
 160
 161 \docparam{to}{The second position.}
 162
 163 \docparam{text}{The text to insert.}
 164
 165 \membersection{wxComboBox::Remove}\label{wxcomboboxremove}
 166
 167 \func{void}{Remove}{\param{long}{ from}, \param{long}{ to}}
 168
 169 Removes the text between the two positions in the combobox text field.
 170
 171 \wxheading{Parameters}
 172
 173 \docparam{from}{The first position.}
 174
 175 \docparam{to}{The last position.}
 176
 177 \membersection{wxComboBox::SetInsertionPoint}\label{wxcomboboxsetinsertionpoint}
 178
 179 \func{void}{SetInsertionPoint}{\param{long}{ pos}}
 180
 181 Sets the insertion point in the combobox text field.
 182
 183 \wxheading{Parameters}
 184
 185 \docparam{pos}{The new insertion point.}
 186
 187 \membersection{wxComboBox::SetInsertionPointEnd}\label{wxcomboboxsetinsertionpointend}
 188
 189 \func{void}{SetInsertionPointEnd}{\void}
 190
 191 Sets the insertion point at the end of the combobox text field.
 192
 193 \membersection{wxComboBox::SetSelection}\label{wxcomboboxsetselection}
 194
 195 \func{void}{SetSelection}{\param{long}{ from}, \param{long}{ to}}
 196
 197 Selects the text between the two positions, in the combobox text field.
 198
 199 \wxheading{Parameters}
 200
 201 \docparam{from}{The first position.}
 202
 203 \docparam{to}{The second position.}
 204
 205 \pythonnote{This method is called {\tt SetMark} in wxPython, {\tt SetSelection}
 206 name is kept for
 207 \helpref{wxControlWithItems::SetSelection}{wxcontrolwithitemssetselection}.}
 208
 209 \membersection{wxComboBox::SetValue}\label{wxcomboboxsetvalue}
 210
 211 \func{void}{SetValue}{\param{const wxString\& }{text}}
 212
 213 Sets the text for the combobox text field.
 214
 215 {\bf NB:} For a combobox with {\tt wxCB\_READONLY} style the string must be in
 216 the combobox choices list, otherwise the call to SetValue() is ignored.
 217
 218 \wxheading{Parameters}
 219
 220 \docparam{text}{The text to set.}
 221
 222