New wxDataObject, DnD and Clipboard code
A few more minor fixes git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1194 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robert Roebling
@@ -57,26 +57,26 @@ targets_selection_received( GtkWidget *WXUNUSED(widget),
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GtkSelectionData *selection_data,
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wxClipboard *clipboard )
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{
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if (!wxTheClipboard) return;
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if (!wxTheClipboard) return;
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if (selection_data->length <= 0) return;
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if (selection_data->length <= 0) return;
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// make sure we got the data in the correct form
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if (selection_data->type != GDK_SELECTION_TYPE_ATOM) return;
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// make sure we got the data in the correct form
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if (selection_data->type != GDK_SELECTION_TYPE_ATOM) return;
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// the atoms we received, holding a list of targets (= formats)
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GdkAtom *atoms = (GdkAtom *)selection_data->data;
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// the atoms we received, holding a list of targets (= formats)
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GdkAtom *atoms = (GdkAtom *)selection_data->data;
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for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
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{
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if (atoms[i] == clipboard->m_targetRequested)
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{
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clipboard->m_formatSupported = TRUE;
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return;
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}
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}
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for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
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{
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if (atoms[i] == clipboard->m_targetRequested)
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{
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clipboard->m_formatSupported = TRUE;
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return;
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}
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}
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return;
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return;
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}
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//-----------------------------------------------------------------------------
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@@ -88,20 +88,63 @@ selection_received( GtkWidget *WXUNUSED(widget),
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GtkSelectionData *selection_data,
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wxClipboard *clipboard )
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{
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if (!wxTheClipboard) return;
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if (!wxTheClipboard) return;
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if (selection_data->length <= 0) return;
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wxDataObject *data_object = clipboard->m_receivedData;
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if (!data_object) return;
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if (selection_data->length <= 0) return;
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size_t size = (size_t) selection_data->length;
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// make sure we got the data in the correct form
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if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;
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clipboard->m_receivedSize = size;
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clipboard->m_receivedData = new char[size+1];
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memcpy( clipboard->m_receivedData, selection_data->data, size);
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// make sure we got the data in the correct format
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if (data_object->m_formatAtom != selection_data->target) return;
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// make sure we got the data in the correct form (selection type).
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// if so, copy data to target object
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switch (data_object->GetFormat())
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{
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case wxDF_TEXT:
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{
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if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;
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wxTextDataObject *text_object = (wxTextDataObject *) data_object;
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wxString text = (const char*) selection_data->data;
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text_object->SetText( text );
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break;
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}
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case wxDF_BITMAP:
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{
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if (selection_data->type != GDK_SELECTION_TYPE_BITMAP) return;
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return;
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break;
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}
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case wxDF_PRIVATE:
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{
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if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;
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wxPrivateDataObject *private_object = (wxPrivateDataObject *) data_object;
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private_object->SetData( (const char*) selection_data->data, (size_t) selection_data->length );
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break;
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}
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default:
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{
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return;
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}
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}
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wxTheClipboard->m_formatSupported = TRUE;
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}
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//-----------------------------------------------------------------------------
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@@ -111,14 +154,14 @@ selection_received( GtkWidget *WXUNUSED(widget),
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static gint
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selection_clear( GtkWidget *WXUNUSED(widget), GdkEventSelection *WXUNUSED(event) )
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{
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if (!wxTheClipboard) return TRUE;
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if (!wxTheClipboard) return TRUE;
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/* the clipboard is no longer in our hands. we can delete the
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* clipboard data. I hope I got that one right... */
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// the clipboard is no longer in our hands. we have to delete the
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// clipboard data.
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wxTheClipboard->SetData( (wxDataObject*) NULL );
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wxTheClipboard->m_dataObjects.Clear();
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return TRUE;
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return TRUE;
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}
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//-----------------------------------------------------------------------------
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@@ -128,33 +171,70 @@ selection_clear( GtkWidget *WXUNUSED(widget), GdkEventSelection *WXUNUSED(event)
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static void
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selection_handler( GtkWidget *WXUNUSED(widget), GtkSelectionData *selection_data, gpointer WXUNUSED(data) )
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{
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if (!wxTheClipboard) return;
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if (!wxTheClipboard) return;
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wxDataObject *data_object = wxTheClipboard->m_data;
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if (!data_object) return;
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if (data_object->GetDataSize() == 0) return;
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gint len = data_object->GetDataSize();
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guchar *bin_data = (guchar*) malloc( len );
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data_object->GetDataHere( (void*)bin_data );
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if (selection_data->target == GDK_TARGET_STRING)
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{
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gtk_selection_data_set(
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selection_data, GDK_SELECTION_TYPE_STRING, 8*sizeof(gchar), bin_data, len );
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}
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/*
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else if (selection_data->target == g_textAtom)
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{
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gtk_selection_data_set(
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selection_data, g_textAtom, 8*sizeof(gchar), bin_data, len );
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}
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*/
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free( bin_data );
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wxNode *node = wxTheClipboard->m_dataObjects.First();
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while (node)
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{
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wxDataObject *data_object = (wxDataObject *)node->Data();
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if (data_object->m_formatAtom != selection_data->target)
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{
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node = node->Next();
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break;
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}
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switch (data_object->GetFormat())
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{
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case wxDF_TEXT:
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{
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wxTextDataObject *text_object = (wxTextDataObject*) data_object;
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wxString text = text_object->GetText();
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char *s = WXSTRINGCAST text;
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int len = (int) text.Length();
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gtk_selection_data_set(
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selection_data,
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GDK_SELECTION_TYPE_STRING,
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8*sizeof(gchar),
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(unsigned char*) s,
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len );
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break;
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}
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case wxDF_BITMAP:
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{
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// wxBitmapDataObject *private_object = (wxBitmapDataObject*) data_object;
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// how do we do that ?
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break;
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}
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case wxDF_PRIVATE:
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{
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wxPrivateDataObject *private_object = (wxPrivateDataObject*) data_object;
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if (private_object->GetDataSize() == 0) return;
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gtk_selection_data_set(
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selection_data,
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GDK_SELECTION_TYPE_STRING,
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8*sizeof(gchar),
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(unsigned char*) private_object->GetData(),
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(int) private_object->GetDataSize() );
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}
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default:
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break;
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}
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node = node->Next();
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}
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}
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//-----------------------------------------------------------------------------
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@@ -165,185 +245,222 @@ IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
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wxClipboard::wxClipboard()
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{
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m_data = (wxDataObject*) NULL;
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m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
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gtk_widget_realize( m_clipboardWidget );
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m_open = FALSE;
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gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
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"selection_clear_event",
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GTK_SIGNAL_FUNC( selection_clear ),
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(gpointer) NULL );
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if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
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if (!g_textAtom) g_textAtom = gdk_atom_intern( "TEXT", FALSE );
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if (!g_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE);
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m_dataObjects.DeleteContents( TRUE );
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m_receivedData = (char*)NULL;
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m_receivedSize = 0;
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m_formatSupported = FALSE;
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m_targetRequested = 0;
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m_receivedData = (wxDataObject*) NULL;
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m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
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gtk_widget_realize( m_clipboardWidget );
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gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
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"selection_clear_event",
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GTK_SIGNAL_FUNC( selection_clear ),
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(gpointer) NULL );
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if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
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if (!g_textAtom) g_textAtom = gdk_atom_intern( "TEXT", FALSE );
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if (!g_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE);
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m_formatSupported = FALSE;
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m_targetRequested = 0;
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}
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wxClipboard::~wxClipboard()
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{
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Clear();
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Clear();
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if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
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if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
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}
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void wxClipboard::Clear()
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{
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/* As we have data we also own the clipboard. Once we no longer own
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it, clear_selection is called which will set m_data to zero */
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if (m_dataObjects.GetCount())
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{
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/* As we have data we also own the clipboard. Once we no longer own
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it, clear_selection is called which will set m_data to zero */
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if (m_data)
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{
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if (gdk_selection_owner_get( g_clipboardAtom) == m_clipboardWidget->window)
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if (gdk_selection_owner_get( g_clipboardAtom) == m_clipboardWidget->window)
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{
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gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME );
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}
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m_dataObjects.Clear();
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}
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m_targetRequested = 0;
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m_formatSupported = FALSE;
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}
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bool wxClipboard::Open()
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{
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wxCHECK_MSG( !m_open, FALSE, "clipboard already open" );
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m_open = TRUE;
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return TRUE;
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}
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bool wxClipboard::SetData( wxDataObject *data )
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{
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wxCHECK_MSG( data, FALSE, "data is invalid" );
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m_dataObjects.Append( data );
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wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
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if (data->GetFormat() == wxDF_PRIVATE)
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{
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gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME );
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wxPrivateDataObject* pd = (wxPrivateDataObject*) data;
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wxCHECK_MSG( !pd->GetId().IsEmpty(), FALSE, "private clipboard format requires ID string" );
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data->m_formatAtom = GetTargetAtom( data->GetFormat(), pd->GetId() );
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}
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else
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{
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data->m_formatAtom = GetTargetAtom( data->GetFormat() );
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}
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// Add handlers if someone requests data
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gtk_selection_add_handler( m_clipboardWidget,
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g_clipboardAtom,
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data->m_formatAtom,
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selection_handler,
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NULL );
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// Tell the world we offer clipboard data
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if (!gtk_selection_owner_set( m_clipboardWidget,
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g_clipboardAtom,
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GDK_CURRENT_TIME ))
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{
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return FALSE;
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}
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return TRUE;
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}
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void wxClipboard::Close()
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{
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wxCHECK_RET( m_open, "clipboard not open" );
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m_open = FALSE;
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}
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bool wxClipboard::IsSupportedFormat( wxDataFormat format, const wxString &id )
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{
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m_targetRequested = GetTargetAtom( format, id );
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if (m_targetRequested == 0) return FALSE;
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// add handler for target (= format) query
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gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
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"selection_received",
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GTK_SIGNAL_FUNC( targets_selection_received ),
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(gpointer) this );
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m_formatSupported = FALSE;
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// perform query. this will set m_formatSupported to
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// TRUE if m_targetRequested is supported
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gtk_selection_convert( m_clipboardWidget,
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g_clipboardAtom,
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g_targetsAtom,
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GDK_CURRENT_TIME );
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gtk_signal_disconnect_by_func( GTK_OBJECT(m_clipboardWidget),
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GTK_SIGNAL_FUNC( targets_selection_received ),
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(gpointer) this );
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if (!m_formatSupported) return FALSE;
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return TRUE;
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}
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bool wxClipboard::GetData( wxDataObject *data )
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{
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wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
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m_receivedData = data;
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wxCHECK_MSG( m_receivedData, FALSE, "invalid data object" );
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if (m_receivedData->GetFormat() == wxDF_PRIVATE)
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{
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wxPrivateDataObject* pd = (wxPrivateDataObject*) m_receivedData;
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wxCHECK_MSG( !pd->GetId().IsEmpty(), FALSE, "private clipboard format requires ID string" );
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m_targetRequested = GetTargetAtom( m_receivedData->GetFormat(), pd->GetId() );
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}
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else
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{
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m_targetRequested = GetTargetAtom( m_receivedData->GetFormat() );
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}
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delete m_data;
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m_data = (wxDataObject*) NULL;
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}
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data->m_formatAtom = m_targetRequested;
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m_receivedSize = 0;
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wxCHECK_MSG( m_targetRequested, FALSE, "unsupported clipboard format" );
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if (m_receivedData)
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{
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delete[] m_receivedData;
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m_receivedData = (char*) NULL;
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}
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m_formatSupported = FALSE;
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m_targetRequested = 0;
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gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
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"selection_received",
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GTK_SIGNAL_FUNC( selection_received ),
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(gpointer) this );
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gtk_selection_convert( m_clipboardWidget,
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g_clipboardAtom,
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m_targetRequested,
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GDK_CURRENT_TIME );
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m_formatSupported = FALSE;
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gtk_signal_disconnect_by_func( GTK_OBJECT(m_clipboardWidget),
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GTK_SIGNAL_FUNC( selection_received ),
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(gpointer) this );
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wxCHECK_MSG( m_formatSupported, FALSE, "error retrieving data from clipboard" );
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return TRUE;
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}
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void wxClipboard::SetData( wxDataObject *data )
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GdkAtom wxClipboard::GetTargetAtom( wxDataFormat format, const wxString &id )
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{
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Clear();
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// What is X representation of that format?
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/*
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GTK 1.0.X cannot remove a target from a widget so if a widget
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at first offers text and then a bitmap (and no longer text) to
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the clipboard, we seem too have to delete it.
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*/
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if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
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m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
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gtk_widget_realize( m_clipboardWidget );
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if (m_data) delete m_data;
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m_data = data;
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if (!m_data) return;
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if (!gtk_selection_owner_set( m_clipboardWidget,
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g_clipboardAtom,
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GDK_CURRENT_TIME))
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{
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delete m_data;
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m_data = (wxDataObject*) NULL;
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return;
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}
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switch (m_data->GetPreferredFormat())
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{
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case wxDF_TEXT:
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gtk_selection_add_handler( m_clipboardWidget,
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g_clipboardAtom,
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// g_textAtom,
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GDK_TARGET_STRING,
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selection_handler,
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NULL );
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break;
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default:
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break;
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}
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}
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bool wxClipboard::IsSupportedFormat( wxDataFormat format )
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{
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m_targetRequested = 0;
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if (format == wxDF_TEXT)
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{
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// m_targetRequested = g_textAtom;
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m_targetRequested = GDK_TARGET_STRING;
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}
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if (m_targetRequested == 0) return FALSE;
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gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
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"selection_received",
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||||
GTK_SIGNAL_FUNC( targets_selection_received ),
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||||
(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::ObtainData( wxDataFormat format )
|
||||
{
|
||||
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 );
|
||||
switch (format)
|
||||
{
|
||||
case wxDF_TEXT:
|
||||
{
|
||||
return GDK_TARGET_STRING;
|
||||
// g_textAtom
|
||||
}
|
||||
|
||||
case wxDF_BITMAP:
|
||||
{
|
||||
return GDK_TARGET_BITMAP;
|
||||
break;
|
||||
}
|
||||
|
||||
case wxDF_PRIVATE:
|
||||
{
|
||||
// we create our own X representation
|
||||
|
||||
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 );
|
||||
return gdk_atom_intern( WXSTRINGCAST( id ), FALSE );
|
||||
}
|
||||
|
||||
default:
|
||||
{
|
||||
return (GdkAtom) 0;
|
||||
}
|
||||
}
|
||||
|
||||
return (GdkAtom) 0;
|
||||
}
|
||||
|
||||
//-----------------------------------------------------------------------------
|
||||
@@ -354,13 +471,13 @@ IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule)
|
||||
|
||||
bool wxClipboardModule::OnInit()
|
||||
{
|
||||
wxTheClipboard = new wxClipboard();
|
||||
wxTheClipboard = new wxClipboard();
|
||||
|
||||
return TRUE;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
void wxClipboardModule::OnExit()
|
||||
{
|
||||
if (wxTheClipboard) delete wxTheClipboard;
|
||||
wxTheClipboard = (wxClipboard*) NULL;
|
||||
if (wxTheClipboard) delete wxTheClipboard;
|
||||
wxTheClipboard = (wxClipboard*) NULL;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user