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1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: src/common/lboxcmn.cpp
3 // Purpose: wxListBox class methods common to all platforms
4 // Author: Vadim Zeitlin
5 // Modified by:
6 // Created: 22.10.99
7 // RCS-ID: $Id$
8 // Copyright: (c) wxWidgets team
9 // Licence: wxWindows licence
10 ///////////////////////////////////////////////////////////////////////////////
11
12 // ============================================================================
13 // declarations
14 // ============================================================================
15
16 // ----------------------------------------------------------------------------
17 // headers
18 // ----------------------------------------------------------------------------
19
20 // For compilers that support precompilation, includes "wx.h".
21 #include "wx/wxprec.h"
22
23 #ifdef __BORLANDC__
24 #pragma hdrstop
25 #endif
26
27 #if wxUSE_LISTBOX
28
29 #include "wx/listbox.h"
30
31 #ifndef WX_PRECOMP
32 #include "wx/dynarray.h"
33 #include "wx/arrstr.h"
34 #endif
35
36 #include "wx/log.h"
37
38 // ============================================================================
39 // implementation
40 // ============================================================================
41
42 wxListBoxBase::~wxListBoxBase()
43 {
44 // this destructor is required for Darwin
45 }
46
47 // ----------------------------------------------------------------------------
48 // selection
49 // ----------------------------------------------------------------------------
50
51 bool wxListBoxBase::SetStringSelection(const wxString& s, bool select)
52 {
53 const int sel = FindString(s);
54 if ( sel == wxNOT_FOUND )
55 return false;
56
57 SetSelection(sel, select);
58
59 return true;
60 }
61
62 void wxListBoxBase::DeselectAll(int itemToLeaveSelected)
63 {
64 if ( HasMultipleSelection() )
65 {
66 wxArrayInt selections;
67 GetSelections(selections);
68
69 size_t count = selections.GetCount();
70 for ( size_t n = 0; n < count; n++ )
71 {
72 int item = selections[n];
73 if ( item != itemToLeaveSelected )
74 Deselect(item);
75 }
76 }
77 else // single selection
78 {
79 int sel = GetSelection();
80 if ( sel != wxNOT_FOUND && sel != itemToLeaveSelected )
81 {
82 Deselect(sel);
83 }
84 }
85 }
86
87 void wxListBoxBase::UpdateOldSelections()
88 {
89 if (HasFlag(wxLB_MULTIPLE) || HasFlag(wxLB_EXTENDED))
90 GetSelections( m_oldSelections );
91 }
92
93 static void LBSendEvent( wxCommandEvent &event, wxListBoxBase *listbox, int item )
94 {
95 event.SetInt( item );
96 event.SetString( listbox->GetString( item ) );
97 if ( listbox->HasClientObjectData() )
98 event.SetClientObject( listbox->GetClientObject(item) );
99 else if ( listbox->HasClientUntypedData() )
100 event.SetClientData( listbox->GetClientData(item) );
101 listbox->HandleWindowEvent( event );
102 }
103
104 void wxListBoxBase::CalcAndSendEvent()
105 {
106 wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, GetId());
107 event.SetEventObject( this );
108
109 wxArrayInt selections;
110 GetSelections(selections);
111
112 if ( selections.empty() && m_oldSelections.empty() )
113 {
114 // nothing changed, just leave
115 return;
116 }
117
118 const size_t countSel = selections.size(),
119 countSelOld = m_oldSelections.size();
120 if ( countSel == countSelOld )
121 {
122 bool changed = false;
123 for ( size_t idx = 0; idx < countSel; idx++ )
124 {
125 if (selections[idx] != m_oldSelections[idx])
126 {
127 changed = true;
128 break;
129 }
130 }
131
132 // nothing changed, just leave
133 if ( !changed )
134 return;
135 }
136
137 int item = wxNOT_FOUND;
138 if ( selections.empty() )
139 {
140 // indicate that this is a deselection
141 event.SetExtraLong(0);
142 item = m_oldSelections[0];
143 }
144 else // we [still] have some selections
145 {
146 // Now test if any new item is selected
147 bool any_new_selected = false;
148 for ( size_t idx = 0; idx < countSel; idx++ )
149 {
150 item = selections[idx];
151 if ( m_oldSelections.Index(item) == wxNOT_FOUND )
152 {
153 any_new_selected = true;
154 break;
155 }
156 }
157
158 if ( any_new_selected )
159 {
160 // indicate that this is a selection
161 event.SetExtraLong(1);
162 }
163 else // no new items selected
164 {
165 // Now test if any new item is deselected
166 bool any_new_deselected = false;
167 for ( size_t idx = 0; idx < countSelOld; idx++ )
168 {
169 item = m_oldSelections[idx];
170 if ( selections.Index(item) == wxNOT_FOUND )
171 {
172 any_new_deselected = true;
173 break;
174 }
175 }
176
177 if ( any_new_deselected )
178 {
179 // indicate that this is a selection
180 event.SetExtraLong(0);
181 }
182 else
183 {
184 item = wxNOT_FOUND; // this should be impossible
185 }
186 }
187 }
188
189 wxASSERT_MSG( item != wxNOT_FOUND,
190 "Logic error in wxListBox selection event generation code" );
191
192 m_oldSelections = selections;
193
194 LBSendEvent(event, this, item);
195 }
196
197 // ----------------------------------------------------------------------------
198 // misc
199 // ----------------------------------------------------------------------------
200
201 void wxListBoxBase::Command(wxCommandEvent& event)
202 {
203 SetSelection(event.GetInt(), event.GetExtraLong() != 0);
204 (void)ProcessEvent(event);
205 }
206
207 // ----------------------------------------------------------------------------
208 // SetFirstItem() and such
209 // ----------------------------------------------------------------------------
210
211 void wxListBoxBase::SetFirstItem(const wxString& s)
212 {
213 int n = FindString(s);
214
215 wxCHECK_RET( n != wxNOT_FOUND, wxT("invalid string in wxListBox::SetFirstItem") );
216
217 DoSetFirstItem(n);
218 }
219
220 void wxListBoxBase::AppendAndEnsureVisible(const wxString& s)
221 {
222 Append(s);
223 EnsureVisible(GetCount() - 1);
224 }
225
226 void wxListBoxBase::EnsureVisible(int WXUNUSED(n))
227 {
228 // the base class version does nothing (the only alternative would be to
229 // call SetFirstItem() but this is probably even more stupid)
230 }
231
232 #endif // wxUSE_LISTBOX