wxClipboard *wxTheClipboard = (wxClipboard*) NULL;
+GdkAtom g_textAtom = 0;
+GdkAtom g_clipboardAtom = 0;
+GdkAtom g_targetsAtom = 0;
+
//-----------------------------------------------------------------------------
-// functions
+// reminder
//-----------------------------------------------------------------------------
-void wxInitClipboard()
+/* The contents of a selection are returned in a GtkSelectionData
+ structure. selection/target identify the request.
+ type specifies the type of the return; if length < 0, and
+ the data should be ignored. This structure has object semantics -
+ no fields should be modified directly, they should not be created
+ directly, and pointers to them should not be stored beyond the duration of
+ a callback. (If the last is changed, we'll need to add reference
+ counting)
+
+struct _GtkSelectionData
{
- if (wxTheClipboard) delete wxTheClipboard;
- wxTheClipboard = new wxClipboard();
+ GdkAtom selection;
+ GdkAtom target;
+ GdkAtom type;
+ gint format;
+ guchar *data;
+ gint length;
+};
+
+*/
+
+//-----------------------------------------------------------------------------
+// "selection_received" for targets
+//-----------------------------------------------------------------------------
+
+static void
+targets_selection_received( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+ wxClipboard *clipboard )
+{
+ if (!wxTheClipboard) return;
+
+ if (selection_data->length <= 0) return;
+
+ // make sure we got the data in the correct form
+ if (selection_data->type != GDK_SELECTION_TYPE_ATOM) return;
+
+ // the atoms we received, holding a list of targets (= formats)
+ GdkAtom *atoms = (GdkAtom *)selection_data->data;
+
+ for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
+ {
+ if (atoms[i] == clipboard->m_targetRequested)
+ {
+ clipboard->m_formatSupported = TRUE;
+ return;
+ }
+ }
+
+ return;
}
-void wxDoneClipboard()
+//-----------------------------------------------------------------------------
+// "selection_received" for the actual data
+//-----------------------------------------------------------------------------
+
+static void
+selection_received( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+ wxClipboard *clipboard )
{
- if (wxTheClipboard) delete wxTheClipboard;
- wxTheClipboard = (wxClipboard*) NULL;
+ if (!wxTheClipboard) return;
+
+ if (selection_data->length <= 0) return;
+
+ size_t size = (size_t) selection_data->length;
+
+ // make sure we got the data in the correct form
+ if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;
+
+ clipboard->m_receivedSize = size;
+
+ clipboard->m_receivedData = new char[size+1];
+
+ memcpy( clipboard->m_receivedData, selection_data->data, size);
}
//-----------------------------------------------------------------------------
-// "selection_received"
+// "selection_clear"
//-----------------------------------------------------------------------------
-/*
-static void selection_received( GtkWidget *widget, GtkSelectionData *selection_data, gpointer data )
+static gint
+selection_clear( GtkWidget *WXUNUSED(widget), GdkEventSelection *WXUNUSED(event) )
{
+ if (!wxTheClipboard) return TRUE;
+
+ /* the clipboard is no longer in our hands. we can delete the
+ * clipboard data. I hope I got that one right... */
+
+ wxTheClipboard->SetData( (wxDataObject*) NULL );
+
+ return TRUE;
}
+
+//-----------------------------------------------------------------------------
+// selection handler for supplying data
+//-----------------------------------------------------------------------------
+
+static void
+selection_handler( GtkWidget *WXUNUSED(widget), GtkSelectionData *selection_data, gpointer WXUNUSED(data) )
+{
+ if (!wxTheClipboard) return;
+
+ wxDataObject *data_object = wxTheClipboard->m_data;
+
+ if (!data_object) return;
+
+ if (data_object->GetDataSize() == 0) return;
+
+
+
+ gint len = data_object->GetDataSize();
+ guchar *bin_data = (guchar*) malloc( len );
+ data_object->GetDataHere( (void*)bin_data );
+
+ if (selection_data->target == GDK_TARGET_STRING)
+ {
+ gtk_selection_data_set(
+ selection_data, GDK_SELECTION_TYPE_STRING, 8*sizeof(gchar), bin_data, len );
+ }
+/*
+ else if (selection_data->target == g_textAtom)
+ {
+ gtk_selection_data_set(
+ selection_data, g_textAtom, 8*sizeof(gchar), bin_data, len );
+ }
*/
+ free( bin_data );
+}
//-----------------------------------------------------------------------------
// wxClipboard
wxClipboard::wxClipboard()
{
- m_data = (wxDataObject*)NULL;
+ m_data = (wxDataObject*) NULL;
+
m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
gtk_widget_realize( m_clipboardWidget );
+
+ gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
+ "selection_clear_event",
+ GTK_SIGNAL_FUNC( selection_clear ),
+ (gpointer) NULL );
+
+ if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
+ if (!g_textAtom) g_textAtom = gdk_atom_intern( "TEXT", FALSE );
+ if (!g_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE);
+
+ m_receivedData = (char*)NULL;
+ m_receivedSize = 0;
+ m_formatSupported = FALSE;
+ m_targetRequested = 0;
}
wxClipboard::~wxClipboard()
{
- if (m_data) delete m_data;
+ Clear();
+
if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
}
+void wxClipboard::Clear()
+{
+ /* As we have data we also own the clipboard. Once we no longer own
+ it, clear_selection is called which will set m_data to zero */
+
+ if (m_data)
+ {
+ if (gdk_selection_owner_get( g_clipboardAtom) == m_clipboardWidget->window)
+ {
+ gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME );
+ }
+
+ delete m_data;
+ m_data = (wxDataObject*) NULL;
+ }
+
+ m_receivedSize = 0;
+
+ if (m_receivedData)
+ {
+ delete[] m_receivedData;
+ m_receivedData = (char*) NULL;
+ }
+
+ m_targetRequested = 0;
+
+ m_formatSupported = FALSE;
+}
+
void wxClipboard::SetData( wxDataObject *data )
{
+ Clear();
+
+/*
+ GTK 1.0.X cannot remove a target from a widget so if a widget
+ at first offers text and then a bitmap (and no longer text) to
+ the clipboard, we seem too have to delete it.
+*/
+
+ if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
+
+ m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
+ gtk_widget_realize( m_clipboardWidget );
+
if (m_data) delete m_data;
m_data = data;
+ if (!m_data) return;
+
+ if (!gtk_selection_owner_set( m_clipboardWidget,
+ g_clipboardAtom,
+ GDK_CURRENT_TIME))
+ {
+ delete m_data;
+ m_data = (wxDataObject*) NULL;
+ return;
+ }
+
+ switch (m_data->GetPreferredFormat())
+ {
+ case wxDF_TEXT:
+ gtk_selection_add_handler( m_clipboardWidget,
+ g_clipboardAtom,
+ // g_textAtom,
+ GDK_TARGET_STRING,
+ selection_handler,
+ NULL );
+ break;
+ default:
+ break;
+ }
}
-void *wxClipboard::GetData( wxDataFormat format, size_t *length )
+bool wxClipboard::IsSupportedFormat( wxDataFormat format )
{
- if (!IsAvailable(format))
+ m_targetRequested = 0;
+
+ if (format == wxDF_TEXT)
{
- if (length) *length = 0;
- return NULL;
+// m_targetRequested = g_textAtom;
+ m_targetRequested = GDK_TARGET_STRING;
}
- return NULL;
+
+ if (m_targetRequested == 0) return FALSE;
+
+ gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
+ "selection_received",
+ GTK_SIGNAL_FUNC( targets_selection_received ),
+ (gpointer) this );
+
+ m_formatSupported = FALSE;
+
+ gtk_selection_convert( m_clipboardWidget,
+ g_clipboardAtom,
+ g_targetsAtom,
+ GDK_CURRENT_TIME );
+
+ gtk_signal_disconnect_by_func( GTK_OBJECT(m_clipboardWidget),
+ GTK_SIGNAL_FUNC( targets_selection_received ),
+ (gpointer) this );
+
+ if (!m_formatSupported) return FALSE;
+
+ return TRUE;
}
-bool wxClipboard::IsAvailable( wxDataFormat WXUNUSED(format) )
+bool wxClipboard::ObtainData( wxDataFormat format )
{
- return FALSE;
+ m_receivedSize = 0;
+
+ if (m_receivedData)
+ {
+ delete[] m_receivedData;
+ m_receivedData = (char*) NULL;
+ }
+
+ m_targetRequested = 0;
+
+ if (format == wxDF_TEXT)
+ {
+// m_targetRequested = g_textAtom;
+ m_targetRequested = GDK_TARGET_STRING;
+ }
+
+ if (m_targetRequested == 0) return FALSE;
+
+ gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
+ "selection_received",
+ GTK_SIGNAL_FUNC( selection_received ),
+ (gpointer) this );
+
+ gtk_selection_convert( m_clipboardWidget,
+ g_clipboardAtom,
+ m_targetRequested,
+ GDK_CURRENT_TIME );
+
+ gtk_signal_disconnect_by_func( GTK_OBJECT(m_clipboardWidget),
+ GTK_SIGNAL_FUNC( selection_received ),
+ (gpointer) this );
+
+ if (m_receivedSize == 0) return FALSE;
+
+ return TRUE;
+}
+
+size_t wxClipboard::GetDataSize() const
+{
+ return m_receivedSize;
+}
+
+void wxClipboard::GetDataHere( void *data ) const
+{
+ memcpy(data, m_receivedData, m_receivedSize );
+}
+
+//-----------------------------------------------------------------------------
+// wxClipboardModule
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule)
+
+bool wxClipboardModule::OnInit()
+{
+ wxTheClipboard = new wxClipboard();
+
+ return TRUE;
+}
+
+void wxClipboardModule::OnExit()
+{
+ if (wxTheClipboard) delete wxTheClipboard;
+ wxTheClipboard = (wxClipboard*) NULL;
}
projects / wxWidgets.git / blobdiff