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{wxChoice}{wxchoice}\\
  12 \helpref{wxControl}{wxcontrol}\\
  13 \helpref{wxWindow}{wxwindow}\\
  14 \helpref{wxEvtHandler}{wxevthandler}\\
  15 \helpref{wxObject}{wxobject}
  16
  17 \wxheading{Include files}
  18
  19 <wx/combo.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}}{Creates a combo box consisting of a drop-down list and static text item
  27 displaying the current selection.}
  28 \twocolitem{\windowstyle{wxCB\_SORT}}{Sorts the entries in the list alphabetically.}
  29 \end{twocollist}
  30
  31 See also \helpref{window styles overview}{windowstyles}.
  32
  33 \wxheading{Event handling}
  34
  35 \twocolwidtha{7cm}
  36 \begin{twocollist}\itemsep=0pt
  37 \twocolitem{{\bf EVT\_COMBOBOX(id, func)}}{Process a wxEVT\_COMMAND\_COMBOBOX\_SELECTED event,
  38 when an item on the list is selected.}
  39 \twocolitem{{\bf EVT\_TEXT(id, func)}}{Process a wxEVT\_COMMAND\_TEXT\_UPDATED event,
  40 when the combobox text changes.}
  41 \end{twocollist}
  42
  43 \wxheading{See also}
  44
  45 \helpref{wxListBox}{wxlistbox}, \helpref{wxTextCtrl}{wxtextctrl}, \helpref{wxChoice}{wxchoice},
  46 \rtfsp\helpref{wxCommandEvent}{wxcommandevent}
  47
  48 \latexignore{\rtfignore{\wxheading{Members}}}
  49
  50 \membersection{wxComboBox::wxComboBox}\label{wxcomboboxconstr}
  51
  52 \func{}{wxComboBox}{\void}
  53
  54 Default constructor.
  55
  56 \func{}{wxComboBox}{\param{wxWindow*}{ parent}, \param{wxWindowID}{ id},\rtfsp
  57 \param{const wxString\& }{value = ``"}, \param{const wxPoint\&}{ pos = wxDefaultPosition}, \param{const wxSize\&}{ size = wxDefaultSize},\rtfsp
  58 \param{int}{ n}, \param{const wxString }{choices[]},\rtfsp
  59 \param{long}{ style = 0}, \param{const wxValidator\& }{validator = wxDefaultValidator}, \param{const wxString\& }{name = ``comboBox"}}
  60
  61 Constructor, creating and showing a combobox.
  62
  63 \wxheading{Parameters}
  64
  65 \docparam{parent}{Parent window. Must not be NULL.}
  66
  67 \docparam{id}{Window identifier. A value of -1 indicates a default value.}
  68
  69 \docparam{pos}{Window position.}
  70
  71 \docparam{size}{Window size. If the default size (-1, -1) is specified then the window is sized
  72 appropriately.}
  73
  74 \docparam{n}{Number of strings with which to initialise the control.}
  75
  76 \docparam{choices}{An array of strings with which to initialise the control.}
  77
  78 \docparam{style}{Window style. See \helpref{wxComboBox}{wxcombobox}.}
  79
  80 \docparam{validator}{Window validator.}
  81
  82 \docparam{name}{Window name.}
  83
  84 \wxheading{See also}
  85
  86 \helpref{wxComboBox::Create}{wxcomboboxcreate}, \helpref{wxValidator}{wxvalidator}
  87
  88 \pythonnote{The wxComboBox constructor in wxPython reduces the {\tt n}
  89 and {\tt choices} arguments are to a single argument, which is
  90 a list of strings.}
  91
  92
  93 \membersection{wxComboBox::\destruct{wxComboBox}}
  94
  95 \func{}{\destruct{wxComboBox}}{\void}
  96
  97 Destructor, destroying the combobox.
  98
  99 \membersection{wxComboBox::Append}\label{wxcomboboxappend}
 100
 101 \func{void}{Append}{\param{const wxString\& }{item}}
 102
 103 Adds the item to the end of the combobox.
 104
 105 \func{void}{Append}{\param{const wxString\& }{ item}, \param{void* }{clientData}}
 106
 107 Adds the item to the end of the combobox, associating the given data
 108 with the item.
 109
 110 \wxheading{Parameters}
 111
 112 \docparam{item}{The string to add.}
 113
 114 \docparam{clientData}{Client data to associate with the item.}
 115
 116 \membersection{wxComboBox::Clear}\label{wxcomboboxclear}
 117
 118 \func{void}{Clear}{\void}
 119
 120 Clears all strings from the combobox.
 121
 122 \membersection{wxComboBox::Create}\label{wxcomboboxcreate}
 123
 124 \func{bool}{Create}{\param{wxWindow*}{ parent}, \param{wxWindowID}{ id},\rtfsp
 125 \param{const wxString\& }{value = ``"}, \param{const wxPoint\&}{ pos = wxDefaultPosition}, \param{const wxSize\&}{ size = wxDefaultSize},\rtfsp
 126 \param{int}{ n}, \param{const wxString }{choices[]},\rtfsp
 127 \param{long}{ style = 0}, \param{const wxValidator\& }{validator = wxDefaultValidator}, \param{const wxString\& }{name = ``comboBox"}}
 128
 129 Creates the combobox for two-step construction. Derived classes
 130 should call or replace this function. See \helpref{wxComboBox::wxComboBox}{wxcomboboxconstr}\rtfsp
 131 for further details.
 132
 133 \membersection{wxComboBox::Copy}\label{wxcomboboxcopy}
 134
 135 \func{void}{Copy}{\void}
 136
 137 Copies the selected text to the clipboard.
 138
 139 \membersection{wxComboBox::Cut}\label{wxcomboboxcut}
 140
 141 \func{void}{Cut}{\void}
 142
 143 Copies the selected text to the clipboard and removes the selection.
 144
 145 \membersection{wxComboBox::Delete}\label{wxcomboboxdelete}
 146
 147 \func{void}{Delete}{\param{int}{ n}}
 148
 149 Deletes an item from the combobox.
 150
 151 \wxheading{Parameters}
 152
 153 \docparam{n}{The item to delete, starting from zero.}
 154
 155 \membersection{wxComboBox::FindString}\label{wxcomboboxfindstring}
 156
 157 \func{int}{FindString}{\param{const wxString\& }{string}}
 158
 159 Finds a choice matching the given string.
 160
 161 \wxheading{Parameters}
 162
 163 \docparam{string}{The item to find.}
 164
 165 \wxheading{Return value}
 166
 167 The position if found, or -1 if not found.
 168
 169 \membersection{wxComboBox::GetClientData}\label{wxcomboboxgetclientdata}
 170
 171 \constfunc{void*}{GetClientData}{\param{int}{ n}}
 172
 173 Returns a pointer to the client data associated with the given item (if any).
 174
 175 \wxheading{Parameters}
 176
 177 \docparam{n}{An item, starting from zero.}
 178
 179 \wxheading{Return value}
 180
 181 A pointer to the client data, or NULL if the item was not found.
 182
 183 \membersection{wxComboBox::GetInsertionPoint}\label{wxcomboboxgetinsertionpoint}
 184
 185 \constfunc{long}{GetInsertionPoint}{\void}
 186
 187 Returns the insertion point for the combobox's text field.
 188
 189 \membersection{wxComboBox::GetLastPosition}\label{wxcomboboxgetlastposition}
 190
 191 \constfunc{long}{GetLastPosition}{\void}
 192
 193 Returns the last position in the combobox text field.
 194
 195 \membersection{wxComboBox::GetSelection}\label{wxcomboboxgetselection}
 196
 197 \constfunc{int}{GetSelection}{\void}
 198
 199 Gets the position of the selected string, or -1 if there is no selection.
 200
 201 \membersection{wxComboBox::GetString}\label{wxcomboboxgetstring}
 202
 203 \constfunc{wxString}{GetString}{\param{int}{ n}}
 204
 205 Returns the string at position {\it n}.
 206
 207 \wxheading{Parameters}
 208
 209 \docparam{n}{The item position, starting from zero.}
 210
 211 \wxheading{Return value}
 212
 213 The string if the item is found, otherwise the empty string.
 214
 215 \membersection{wxComboBox::GetStringSelection}\label{wxcomboboxgetstringselection}
 216
 217 \constfunc{wxString}{GetStringSelection}{\void}
 218
 219 Gets the selected string.
 220
 221 \membersection{wxComboBox::GetValue}\label{wxcomboboxgetvalue}
 222
 223 \constfunc{wxString}{GetValue}{\void}
 224
 225 Returns the current value in the combobox text field.
 226
 227 \membersection{wxComboBox::Number}\label{wxcomboboxnumber}
 228
 229 \constfunc{int}{Number}{\void}
 230
 231 Returns the number of items in the combobox list.
 232 %TODO: make this GetNumber or GetCount?
 233
 234 \membersection{wxComboBox::Paste}\label{wxcomboboxpaste}
 235
 236 \func{void}{Paste}{\void}
 237
 238 Pastes text from the clipboard to the text field.
 239
 240 \membersection{wxComboBox::Replace}\label{wxcomboboxreplace}
 241
 242 \func{void}{Replace}{\param{long}{ from}, \param{long}{ to}, \param{const wxString\& }{text}}
 243
 244 Replaces the text between two positions with the given text, in the combobox text field.
 245
 246 \wxheading{Parameters}
 247
 248 \docparam{from}{The first position.}
 249
 250 \docparam{to}{The second position.}
 251
 252 \docparam{text}{The text to insert.}
 253
 254 \membersection{wxComboBox::Remove}\label{wxcomboboxremove}
 255
 256 \func{void}{Remove}{\param{long}{ from}, \param{long}{ to}}
 257
 258 Removes the text between the two positions in the combobox text field.
 259
 260 \wxheading{Parameters}
 261
 262 \docparam{from}{The first position.}
 263
 264 \docparam{to}{The last position.}
 265
 266 \membersection{wxComboBox::SetClientData}\label{wxcomboboxsetclientdata}
 267
 268 \func{void}{SetClientData}{\param{int}{ n}, \param{void* }{data}}
 269
 270 Associates the given client data pointer with the given item.
 271
 272 \wxheading{Parameters}
 273
 274 \docparam{n}{The zero-based item.}
 275
 276 \docparam{data}{The client data.}
 277
 278 \membersection{wxComboBox::SetInsertionPoint}\label{wxcomboboxsetinsertionpoint}
 279
 280 \func{void}{SetInsertionPoint}{\param{long}{ pos}}
 281
 282 Sets the insertion point in the combobox text field.
 283
 284 \wxheading{Parameters}
 285
 286 \docparam{pos}{The new insertion point.}
 287
 288 \membersection{wxComboBox::SetInsertionPointEnd}\label{wxcomboboxsetinsertionpointend}
 289
 290 \func{void}{SetInsertionPointEnd}{\void}
 291
 292 Sets the insertion point at the end of the combobox text field.
 293
 294 \membersection{wxComboBox::SetSelection}\label{wxcomboboxsetselection}
 295
 296 \func{void}{SetSelection}{\param{int}{ n}}
 297
 298 Selects the given item in the combobox list. This does not cause a
 299 wxEVT\_COMMAND\_COMBOBOX\_SELECTED event to get emitted.
 300
 301 \func{void}{SetSelection}{\param{long}{ from}, \param{long}{ to}}
 302
 303 Selects the text between the two positions, in the combobox text field.
 304
 305 \wxheading{Parameters}
 306
 307 \docparam{n}{The zero-based item to select.}
 308
 309 \docparam{from}{The first position.}
 310
 311 \docparam{to}{The second position.}
 312
 313 \pythonnote{The second form of this method is called {\tt SetMark} in
 314 wxPython.}
 315
 316 \membersection{wxComboBox::SetValue}\label{wxcomboboxsetvalue}
 317
 318 \func{void}{SetValue}{\param{const wxString\& }{text}}
 319
 320 Sets the text for the combobox text field.
 321
 322 \wxheading{Parameters}
 323
 324 \docparam{text}{The text to set.}
 325
 326