src/gtk/textentry.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/textentry.cpp
   3 // Purpose:     wxTextEntry implementation for wxGTK
   4 // Author:      Vadim Zeitlin
   5 // Created:     2007-09-24
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2007 Vadim Zeitlin <vadim@wxwindows.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 // for compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #if wxUSE_TEXTCTRL || wxUSE_COMBOBOX
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/window.h"
  30     #include "wx/textctrl.h"
  31 #endif //WX_PRECOMP
  32
  33 #include "wx/textentry.h"
  34
  35 #include "wx/gtk/private.h"
  36
  37 // ============================================================================
  38 // signal handlers implementation
  39 // ============================================================================
  40
  41 extern "C"
  42 {
  43
  44 // "insert_text" handler for GtkEntry
  45 static void
  46 wx_gtk_insert_text_callback(GtkEditable *editable,
  47                             const gchar * WXUNUSED(new_text),
  48                             gint WXUNUSED(new_text_length),
  49                             gint * WXUNUSED(position),
  50                             wxTextEntry *text)
  51 {
  52     // we should only be called if we have a max len limit at all
  53     GtkEntry *entry = GTK_ENTRY (editable);
  54
  55     wxCHECK_RET( entry->text_max_length, _T("shouldn't be called") );
  56
  57     // check that we don't overflow the max length limit
  58     //
  59     // FIXME: this doesn't work when we paste a string which is going to be
  60     //        truncated
  61     if ( entry->text_length == entry->text_max_length )
  62     {
  63         // we don't need to run the base class version at all
  64         g_signal_stop_emission_by_name (editable, "insert_text");
  65
  66         text->SendMaxLenEvent();
  67     }
  68 }
  69
  70 } // extern "C"
  71
  72 // ============================================================================
  73 // wxTextEntry implementation
  74 // ============================================================================
  75
  76 // ----------------------------------------------------------------------------
  77 // text operations
  78 // ----------------------------------------------------------------------------
  79
  80 void wxTextEntry::WriteText(const wxString& value)
  81 {
  82     GtkEditable * const edit = GetEditable();
  83
  84     // remove the selection if there is one and suppress the text change event
  85     // generated by this: we only want to generate one event for this change,
  86     // not two
  87     {
  88         EventsSuppressor noevents(this);
  89         gtk_editable_delete_selection(edit);
  90     }
  91
  92     // insert new text at the cursor position
  93     gint len = gtk_editable_get_position(edit);
  94     gtk_editable_insert_text
  95     (
  96         edit,
  97         wxGTK_CONV_FONT(value, GetEditableWindow()->GetFont()),
  98         -1,     // text: length: compute it using strlen()
  99         &len    // will be updated to position after the text end
 100     );
 101
 102     // and move cursor to the end of new text
 103     gtk_editable_set_position(edit, len);
 104 }
 105
 106 wxString wxTextEntry::GetValue() const
 107 {
 108     const wxGtkString value(gtk_editable_get_chars(GetEditable(), 0, -1));
 109
 110     return wxGTK_CONV_BACK_FONT(value, GetEditableWindow()->GetFont());
 111 }
 112
 113 void wxTextEntry::Remove(long from, long to)
 114 {
 115     gtk_editable_delete_text(GetEditable(), from, to);
 116 }
 117
 118 // ----------------------------------------------------------------------------
 119 // clipboard operations
 120 // ----------------------------------------------------------------------------
 121
 122 void wxTextEntry::Copy()
 123 {
 124     gtk_editable_copy_clipboard(GetEditable());
 125 }
 126
 127 void wxTextEntry::Cut()
 128 {
 129     gtk_editable_cut_clipboard(GetEditable());
 130 }
 131
 132 void wxTextEntry::Paste()
 133 {
 134     gtk_editable_paste_clipboard(GetEditable());
 135 }
 136
 137 // ----------------------------------------------------------------------------
 138 // undo/redo
 139 // ----------------------------------------------------------------------------
 140
 141 void wxTextEntry::Undo()
 142 {
 143     // TODO: not implemented
 144 }
 145
 146 void wxTextEntry::Redo()
 147 {
 148     // TODO: not implemented
 149 }
 150
 151 bool wxTextEntry::CanUndo() const
 152 {
 153     return false;
 154 }
 155
 156 bool wxTextEntry::CanRedo() const
 157 {
 158     return false;
 159 }
 160
 161 // ----------------------------------------------------------------------------
 162 // insertion point
 163 // ----------------------------------------------------------------------------
 164
 165 void wxTextEntry::SetInsertionPoint(long pos)
 166 {
 167     gtk_editable_set_position(GetEditable(), pos);
 168 }
 169
 170 long wxTextEntry::GetInsertionPoint() const
 171 {
 172     return gtk_editable_get_position(GetEditable());
 173 }
 174
 175 long wxTextEntry::GetLastPosition() const
 176 {
 177     // this can't be implemented for arbitrary GtkEditable so only do it for
 178     // GtkEntries
 179     GtkEntry * const entry = GTK_ENTRY(GetEditable());
 180
 181     return entry ? entry->text_length : - 1;
 182 }
 183
 184 // ----------------------------------------------------------------------------
 185 // selection
 186 // ----------------------------------------------------------------------------
 187
 188 void wxTextEntry::SetSelection(long from, long to)
 189 {
 190     gtk_editable_select_region(GetEditable(), from, to);
 191 }
 192
 193 void wxTextEntry::GetSelection(long *from, long *to) const
 194 {
 195     gint start, end;
 196     if ( gtk_editable_get_selection_bounds(GetEditable(), &start, &end) )
 197     {
 198         // the output must always be in order, although in GTK+ it isn't
 199         if ( start > end )
 200         {
 201             gint tmp = start;
 202             start = end;
 203             end = tmp;
 204         }
 205     }
 206     else // no selection
 207     {
 208         // for compatibility with MSW return the empty selection at cursor
 209         start =
 210         end = GetInsertionPoint();
 211     }
 212
 213     if ( from )
 214         *from = start;
 215
 216     if ( to )
 217         *to = end;
 218 }
 219
 220 // ----------------------------------------------------------------------------
 221 // editable status
 222 // ----------------------------------------------------------------------------
 223
 224 bool wxTextEntry::IsEditable() const
 225 {
 226     return gtk_editable_get_editable(GetEditable());
 227 }
 228
 229 void wxTextEntry::SetEditable(bool editable)
 230 {
 231     gtk_editable_set_editable(GetEditable(), editable);
 232 }
 233
 234 // ----------------------------------------------------------------------------
 235 // max text length
 236 // ----------------------------------------------------------------------------
 237
 238 void wxTextEntry::SetMaxLength(unsigned long len)
 239 {
 240     GtkEntry * const entry = GTK_ENTRY(GetEditable());
 241     if ( !entry )
 242         return;
 243
 244     gtk_entry_set_max_length(entry, len);
 245
 246     // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if we had
 247     // tried to enter more text than allowed by max text length and the text
 248     // wasn't really changed
 249     //
 250     // to detect this and generate TEXT_MAXLEN event instead of TEXT_CHANGED
 251     // one in this case we also catch "insert_text" signal
 252     //
 253     // when max len is set to 0 we disconnect our handler as it means that we
 254     // shouldn't check anything any more
 255     if ( len )
 256     {
 257         g_signal_connect
 258         (
 259             entry,
 260             "insert_text",
 261             G_CALLBACK(wx_gtk_insert_text_callback),
 262             this
 263         );
 264     }
 265     else // no max length
 266     {
 267         g_signal_handlers_disconnect_by_func
 268         (
 269             entry,
 270             (gpointer)wx_gtk_insert_text_callback,
 271             this
 272         );
 273     }
 274 }
 275
 276 void wxTextEntry::SendMaxLenEvent()
 277 {
 278     // remember that the next changed signal is to be ignored to avoid
 279     // generating a dummy wxEVT_COMMAND_TEXT_UPDATED event
 280     //IgnoreNextTextUpdate();
 281
 282     wxWindow * const win = const_cast<wxWindow *>(GetEditableWindow());
 283     wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, win->GetId());
 284     event.SetEventObject(win);
 285     event.SetString(GetValue());
 286     win->GetEventHandler()->ProcessEvent(event);
 287 }
 288
 289 #endif // wxUSE_TEXTCTRL || wxUSE_COMBOBOX