src/gtk1/clipbrd.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        clipbrd.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "clipbrd.h"
  12 #endif
  13
  14 #include "wx/clipbrd.h"
  15
  16 //-----------------------------------------------------------------------------
  17 // data
  18 //-----------------------------------------------------------------------------
  19
  20 wxClipboard *wxTheClipboard = (wxClipboard*) NULL;
  21
  22 GdkAtom  g_textAtom        = 0;
  23 GdkAtom  g_clipboardAtom   = 0;
  24
  25 //-----------------------------------------------------------------------------
  26 // functions
  27 //-----------------------------------------------------------------------------
  28
  29 void wxInitClipboard()
  30 {
  31   if (wxTheClipboard) delete wxTheClipboard;
  32   wxTheClipboard = new wxClipboard();
  33 }
  34
  35 void wxDoneClipboard()
  36 {
  37   if (wxTheClipboard) delete wxTheClipboard;
  38   wxTheClipboard = (wxClipboard*) NULL;
  39 }
  40
  41 //-----------------------------------------------------------------------------
  42 // "selection_received"
  43 //-----------------------------------------------------------------------------
  44
  45 static void
  46 selection_received( GtkWidget *widget, GtkSelectionData *selection_data, gpointer data )
  47 {
  48 }
  49
  50 //-----------------------------------------------------------------------------
  51 // "selection_clear"
  52 //-----------------------------------------------------------------------------
  53
  54 static gint
  55 selection_clear( GtkWidget *widget, GdkEventSelection *event )
  56 {
  57   /* The clipboard is no longer in our hands. We can delete the
  58    * clipboard data. I hope I got that one right... */
  59
  60   if (!wxTheClipboard) return TRUE;
  61
  62   wxTheClipboard->SetData( (wxDataObject*) NULL );
  63
  64   return TRUE;
  65 }
  66
  67 //-----------------------------------------------------------------------------
  68 // selection handler for supplying data
  69 //-----------------------------------------------------------------------------
  70
  71 static void
  72 selection_handler( GtkWidget *WXUNUSED(widget), GtkSelectionData *selection_data, gpointer WXUNUSED(data) )
  73 {
  74   if (!wxTheClipboard) return;
  75
  76   wxDataObject *data_object = wxTheClipboard->m_data;
  77
  78   if (!data_object) return;
  79
  80   if (data_object->GetDataSize() == 0) return;
  81
  82   gint len = data_object->GetDataSize();
  83   guchar *bin_data = (guchar*) malloc( len );
  84   data_object->GetDataHere( (void*)bin_data );
  85
  86   if (selection_data->target == GDK_SELECTION_TYPE_STRING)
  87   {
  88     gtk_selection_data_set(
  89       selection_data, GDK_SELECTION_TYPE_STRING, 8*sizeof(gchar), bin_data, len );
  90   }
  91   else if (selection_data->target == g_textAtom)
  92   {
  93     gtk_selection_data_set(
  94       selection_data, g_textAtom, 8*sizeof(gchar), bin_data, len );
  95   }
  96   free( bin_data );
  97 }
  98
  99 //-----------------------------------------------------------------------------
 100 // wxClipboard
 101 //-----------------------------------------------------------------------------
 102
 103 IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
 104
 105 wxClipboard::wxClipboard()
 106 {
 107   m_data = (wxDataObject*) NULL;
 108   m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
 109   gtk_widget_realize( m_clipboardWidget );
 110
 111   gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
 112                       "selection_clear_event",
 113                       GTK_SIGNAL_FUNC( selection_clear ),
 114                       (gpointer) NULL );
 115
 116   if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
 117   if (!g_textAtom) g_textAtom = gdk_atom_intern( "TEXT", FALSE );
 118 }
 119
 120 wxClipboard::~wxClipboard()
 121 {
 122   /* As we have data we also own the clipboard. Once we no longer own
 123      it, clear_selection is called which will set m_data to zero */
 124
 125   if (m_data)
 126   {
 127     delete m_data;
 128     gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY, GDK_CURRENT_TIME );
 129   }
 130   if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
 131 }
 132
 133 void wxClipboard::SetData( wxDataObject *data )
 134 {
 135   if (m_data) delete m_data;
 136   m_data = data;
 137   if (!m_data) return;
 138
 139   if (!gtk_selection_owner_set( m_clipboardWidget,
 140                                 g_clipboardAtom,
 141                                 GDK_CURRENT_TIME))
 142   {
 143     delete m_data;
 144     m_data = (wxDataObject*) NULL;
 145     return;
 146   }
 147
 148   switch (m_data->GetPreferredFormat())
 149   {
 150 /*
 151     case wxDF_STRING:
 152       gtk_selection_add_handler( m_clipboardWidget,
 153                                  g_clipboardAtom,
 154                                  GDK_TARGET_STRING,
 155                                  selection_handler,
 156                                  NULL );
 157       break;
 158 */
 159     case wxDF_TEXT:
 160       gtk_selection_add_handler( m_clipboardWidget,
 161                                  g_clipboardAtom,
 162                                  g_textAtom,
 163                                  selection_handler,
 164                                  NULL );
 165       break;
 166     default:
 167       break;
 168   }
 169 }
 170
 171 void *wxClipboard::GetData( wxDataFormat format, size_t *length )
 172 {
 173   if (!IsAvailable(format))
 174   {
 175     if (length) *length = 0;
 176     return NULL;
 177   }
 178   return NULL;
 179 }
 180
 181 bool wxClipboard::IsAvailable( wxDataFormat WXUNUSED(format) )
 182 {
 183   return FALSE;
 184 }