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1 | \section{\class{wxChoice}}\label{wxchoice} | |
2 | ||
3 | A choice item is used to select one of a list of strings. Unlike a | |
4 | listbox, only the selection is visible until the user pulls down the | |
5 | menu of choices. | |
6 | ||
7 | \wxheading{Derived from} | |
8 | ||
9 | \helpref{wxControlWithItems}{wxcontrolwithitems}\\ | |
10 | \helpref{wxControl}{wxcontrol}\\ | |
11 | \helpref{wxWindow}{wxwindow}\\ | |
12 | \helpref{wxEvtHandler}{wxevthandler}\\ | |
13 | \helpref{wxObject}{wxobject} | |
14 | ||
15 | \wxheading{Include files} | |
16 | ||
17 | <wx/choice.h> | |
18 | ||
19 | \wxheading{Window styles} | |
20 | ||
21 | There are no special styles for wxChoice. | |
22 | ||
23 | See also \helpref{window styles overview}{windowstyles}. | |
24 | ||
25 | \wxheading{Event handling} | |
26 | ||
27 | \twocolwidtha{7cm} | |
28 | \begin{twocollist}\itemsep=0pt | |
29 | \twocolitem{{\bf EVT\_CHOICE(id, func)}}{Process a wxEVT\_COMMAND\_CHOICE\_SELECTED event, | |
30 | when an item on the list is selected.} | |
31 | \end{twocollist} | |
32 | ||
33 | \wxheading{See also} | |
34 | ||
35 | \helpref{wxListBox}{wxlistbox}, \helpref{wxComboBox}{wxcombobox}, | |
36 | \rtfsp\helpref{wxCommandEvent}{wxcommandevent} | |
37 | ||
38 | \latexignore{\rtfignore{\wxheading{Members}}} | |
39 | ||
40 | ||
41 | \membersection{wxChoice::wxChoice}\label{wxchoicector} | |
42 | ||
43 | \func{}{wxChoice}{\void} | |
44 | ||
45 | Default constructor. | |
46 | ||
47 | \func{}{wxChoice}{\param{wxWindow *}{parent}, \param{wxWindowID}{ id},\rtfsp | |
48 | \param{const wxPoint\& }{pos}, \param{const wxSize\&}{ size},\rtfsp | |
49 | \param{int}{ n}, \param{const wxString }{choices[]},\rtfsp | |
50 | \param{long}{ style = 0}, \param{const wxValidator\& }{validator = wxDefaultValidator}, \param{const wxString\& }{name = ``choice"}} | |
51 | ||
52 | \func{}{wxChoice}{\param{wxWindow *}{parent}, \param{wxWindowID}{ id},\rtfsp | |
53 | \param{const wxPoint\& }{pos}, \param{const wxSize\&}{ size},\rtfsp | |
54 | \param{const wxArrayString\& }{choices},\rtfsp | |
55 | \param{long}{ style = 0}, \param{const wxValidator\& }{validator = wxDefaultValidator}, \param{const wxString\& }{name = ``choice"}} | |
56 | ||
57 | Constructor, creating and showing a choice. | |
58 | ||
59 | \wxheading{Parameters} | |
60 | ||
61 | \docparam{parent}{Parent window. Must not be NULL.} | |
62 | ||
63 | \docparam{id}{Window identifier. A value of -1 indicates a default value.} | |
64 | ||
65 | \docparam{pos}{Window position.} | |
66 | ||
67 | \docparam{size}{Window size. If the default size (-1, -1) is specified then the choice is sized | |
68 | appropriately.} | |
69 | ||
70 | \docparam{n}{Number of strings with which to initialise the choice control.} | |
71 | ||
72 | \docparam{choices}{An array of strings with which to initialise the choice control.} | |
73 | ||
74 | \docparam{style}{Window style. See \helpref{wxChoice}{wxchoice}.} | |
75 | ||
76 | \docparam{validator}{Window validator.} | |
77 | ||
78 | \docparam{name}{Window name.} | |
79 | ||
80 | \wxheading{See also} | |
81 | ||
82 | \helpref{wxChoice::Create}{wxchoicecreate}, \helpref{wxValidator}{wxvalidator} | |
83 | ||
84 | \pythonnote{The wxChoice constructor in wxPython reduces the {\tt n} | |
85 | and {\tt choices} arguments are to a single argument, which is | |
86 | a list of strings.} | |
87 | ||
88 | \perlnote{In wxPerl there is just an array reference in place of {\tt n} | |
89 | and {\tt choices}.} | |
90 | ||
91 | ||
92 | \membersection{wxChoice::\destruct{wxChoice}}\label{wxchoicedtor} | |
93 | ||
94 | \func{}{\destruct{wxChoice}}{\void} | |
95 | ||
96 | Destructor, destroying the choice item. | |
97 | ||
98 | ||
99 | \membersection{wxChoice::Create}\label{wxchoicecreate} | |
100 | ||
101 | \func{bool}{Create}{\param{wxWindow *}{parent}, \param{wxWindowID}{ id},\rtfsp | |
102 | \param{const wxPoint\& }{pos}, \param{const wxSize\&}{ size},\rtfsp | |
103 | \param{int}{ n}, \param{const wxString }{choices[]},\rtfsp | |
104 | \param{long}{ style = 0}, \param{const wxValidator\& }{validator = wxDefaultValidator},\rtfsp | |
105 | \param{const wxString\& }{name = ``choice"}} | |
106 | ||
107 | \func{bool}{Create}{\param{wxWindow *}{parent}, \param{wxWindowID}{ id},\rtfsp | |
108 | \param{const wxPoint\& }{pos}, \param{const wxSize\&}{ size},\rtfsp | |
109 | \param{const wxArrayString\& }{choices},\rtfsp | |
110 | \param{long}{ style = 0}, \param{const wxValidator\& }{validator = wxDefaultValidator},\rtfsp | |
111 | \param{const wxString\& }{name = ``choice"}} | |
112 | ||
113 | Creates the choice for two-step construction. See \helpref{wxChoice::wxChoice}{wxchoicector}. | |
114 | ||
115 | ||
116 | \membersection{wxChoice::Delete}\label{wxchoicedelete} | |
117 | ||
118 | \func{void}{Delete}{\param{int }{n}} | |
119 | ||
120 | Deletes the item with the given index from the control. | |
121 | ||
122 | \wxheading{Parameters} | |
123 | ||
124 | \docparam{n}{The item to delete.} | |
125 | ||
126 | ||
127 | \membersection{wxChoice::GetColumns}\label{wxchoicegetcolumns} | |
128 | ||
129 | \constfunc{int}{GetColumns}{\void} | |
130 | ||
131 | Gets the number of columns in this choice item. | |
132 | ||
133 | \wxheading{Remarks} | |
134 | ||
135 | This is implemented for Motif only and always returns $1$ for the other | |
136 | platforms. | |
137 | ||
138 | ||
139 | \membersection{wxChoice::GetCurrentSelection}\label{wxchoicegetcurrentselection} | |
140 | ||
141 | \constfunc{int}{GetCurrentSelection}{\void} | |
142 | ||
143 | Unlike \helpref{GetSelection}{wxcontrolwithitemsgetselection} which only | |
144 | returns the accepted selection value, i.e. the selection in the control once | |
145 | the user closes the dropdown list, this function returns the current selection. | |
146 | That is, while the dropdown list is shown, it returns the currently selected | |
147 | item in it. When it is not shown, its result is the same as for the other | |
148 | function. | |
149 | ||
150 | \newsince{2.6.2} (before this version | |
151 | \helpref{GetSelection}{wxcontrolwithitemsgetselection} itself behaved like | |
152 | this). | |
153 | ||
154 | ||
155 | \membersection{wxChoice::SetColumns}\label{wxchoicesetcolumns} | |
156 | ||
157 | \func{void}{SetColumns}{\param{int}{ n = 1}} | |
158 | ||
159 | Sets the number of columns in this choice item. | |
160 | ||
161 | \wxheading{Parameters} | |
162 | ||
163 | \docparam{n}{Number of columns.} | |
164 | ||
165 | \wxheading{Remarks} | |
166 | ||
167 | This is implemented for Motif only and doesn't do anything under other | |
168 | platforms. | |
169 |