/////////////////////////////////////////////////////////////////////////////
-// Name: clipbrd.cpp
+// Name: gtk/clipbrd.cpp
// Purpose:
// Author: Robert Roebling
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling
-// Licence: wxWindows licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
#include "wx/clipbrd.h"
+#if wxUSE_CLIPBOARD
+
+#include "wx/dataobj.h"
+#include "wx/utils.h"
+#include "wx/log.h"
+
+#include <glib.h>
+#include <gdk/gdk.h>
+#include <gtk/gtk.h>
+
//-----------------------------------------------------------------------------
-// data
+// thread system
//-----------------------------------------------------------------------------
-wxClipboard *wxTheClipboard = (wxClipboard*) NULL;
+#if wxUSE_THREADS
+extern void wxapp_install_thread_wakeup();
+extern void wxapp_uninstall_thread_wakeup();
+#endif
+
+//-----------------------------------------------------------------------------
+// data
+//-----------------------------------------------------------------------------
-GdkAtom g_textAtom = 0;
GdkAtom g_clipboardAtom = 0;
GdkAtom g_targetsAtom = 0;
+// the trace mask we use with wxLogTrace() - call
+// wxLog::AddTraceMask(TRACE_CLIPBOARD) to enable the trace messages from here
+// (there will be a *lot* of them!)
+static const wxChar *TRACE_CLIPBOARD = _T("clipboard");
+
//-----------------------------------------------------------------------------
// reminder
//-----------------------------------------------------------------------------
/* The contents of a selection are returned in a GtkSelectionData
- structure. selection/target identify the request.
+ 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
GdkAtom selection;
GdkAtom target;
GdkAtom type;
- gint format;
+ gint format;
guchar *data;
- gint length;
+ gint length;
};
*/
//-----------------------------------------------------------------------------
static void
-targets_selection_received( GtkWidget *WXUNUSED(widget),
- GtkSelectionData *selection_data,
- wxClipboard *clipboard )
+targets_selection_received( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+#if (GTK_MINOR_VERSION > 0)
+ guint32 WXUNUSED(time),
+#endif
+ 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 ( wxTheClipboard && selection_data->length > 0 )
{
- if (atoms[i] == clipboard->m_targetRequested)
+ /* make sure we got the data in the correct form */
+ GdkAtom type = selection_data->type;
+ if ( type != GDK_SELECTION_TYPE_ATOM )
{
- clipboard->m_formatSupported = TRUE;
- return;
+ if ( strcmp(gdk_atom_name(type), "TARGETS") )
+ {
+ wxLogTrace( TRACE_CLIPBOARD,
+ _T("got unsupported clipboard target") );
+
+ clipboard->m_waiting = FALSE;
+ return;
+ }
+ }
+
+#ifdef __WXDEBUG__
+ wxDataFormat clip( selection_data->selection );
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("selection received for targets, clipboard %s"),
+ clip.GetId().c_str() );
+#endif // __WXDEBUG__
+
+ // 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++)
+ {
+ wxDataFormat format( atoms[i] );
+
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("selection received for targets, format %s"),
+ format.GetId().c_str() );
+
+ if (format == clipboard->m_targetRequested)
+ {
+ clipboard->m_waiting = FALSE;
+ clipboard->m_formatSupported = TRUE;
+ return;
+ }
}
}
- return;
+ clipboard->m_waiting = FALSE;
}
//-----------------------------------------------------------------------------
// "selection_received" for the actual data
//-----------------------------------------------------------------------------
-static void
-selection_received( GtkWidget *WXUNUSED(widget),
- GtkSelectionData *selection_data,
- wxClipboard *clipboard )
+static void
+selection_received( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+#if (GTK_MINOR_VERSION > 0)
+ guint32 WXUNUSED(time),
+#endif
+ wxClipboard *clipboard )
{
- if (!wxTheClipboard) return;
-
+ if (!wxTheClipboard)
+ {
+ clipboard->m_waiting = FALSE;
+ return;
+ }
+
wxDataObject *data_object = clipboard->m_receivedData;
-
- if (!data_object) return;
-
- if (selection_data->length <= 0) return;
-
- // make sure we got the data in the correct format
-
- if (data_object->m_formatAtom != selection_data->target) return;
-
- // make sure we got the data in the correct form (selection type).
- // if so, copy data to target object
-
- switch (data_object->GetFormat())
+
+ if (!data_object)
+ {
+ clipboard->m_waiting = FALSE;
+ return;
+ }
+
+ if (selection_data->length <= 0)
+ {
+ clipboard->m_waiting = FALSE;
+ return;
+ }
+
+ wxDataFormat format( selection_data->target );
+
+ /* make sure we got the data in the correct format */
+ if (!data_object->IsSupportedFormat( format ) )
+ {
+ clipboard->m_waiting = FALSE;
+ return;
+ }
+
+ /* make sure we got the data in the correct form (selection type).
+ if so, copy data to target object */
+ if (selection_data->type != GDK_SELECTION_TYPE_STRING)
{
- case wxDF_TEXT:
- {
- if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;
-
- wxTextDataObject *text_object = (wxTextDataObject *) data_object;
-
- wxString text = (const char*) selection_data->data;
-
- text_object->SetText( text );
-
- break;
- }
-
- case wxDF_BITMAP:
- {
- if (selection_data->type != GDK_SELECTION_TYPE_BITMAP) return;
-
- return;
-
- break;
- }
-
- case wxDF_PRIVATE:
- {
- if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;
-
- wxPrivateDataObject *private_object = (wxPrivateDataObject *) data_object;
-
- private_object->SetData( (const char*) selection_data->data, (size_t) selection_data->length );
-
- break;
- }
-
- default:
- {
- return;
- }
+ clipboard->m_waiting = FALSE;
+ return;
}
-
+
+ data_object->SetData( format, (size_t) selection_data->length, (const char*) selection_data->data );
+
wxTheClipboard->m_formatSupported = TRUE;
+ clipboard->m_waiting = FALSE;
}
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
static gint
-selection_clear( GtkWidget *WXUNUSED(widget), GdkEventSelection *WXUNUSED(event) )
+selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event )
{
if (!wxTheClipboard) return TRUE;
-
- // the clipboard is no longer in our hands. we have to delete the
- // clipboard data.
-
- wxTheClipboard->m_dataObjects.Clear();
-
+
+ if (event->selection == GDK_SELECTION_PRIMARY)
+ {
+ wxTheClipboard->m_ownsPrimarySelection = FALSE;
+ }
+ else
+ if (event->selection == g_clipboardAtom)
+ {
+ wxTheClipboard->m_ownsClipboard = FALSE;
+ }
+ else
+ {
+ wxTheClipboard->m_waiting = FALSE;
+ return FALSE;
+ }
+
+ if ((!wxTheClipboard->m_ownsPrimarySelection) &&
+ (!wxTheClipboard->m_ownsClipboard))
+ {
+ /* the clipboard is no longer in our hands. we can the delete clipboard data. */
+ if (wxTheClipboard->m_data)
+ {
+ wxLogTrace(TRACE_CLIPBOARD, wxT("wxClipboard will get cleared" ));
+
+ delete wxTheClipboard->m_data;
+ wxTheClipboard->m_data = (wxDataObject*) NULL;
+ }
+ }
+
+ wxTheClipboard->m_waiting = FALSE;
return TRUE;
}
//-----------------------------------------------------------------------------
static void
-selection_handler( GtkWidget *WXUNUSED(widget), GtkSelectionData *selection_data, gpointer WXUNUSED(data) )
+selection_handler( GtkWidget *WXUNUSED(widget),
+ GtkSelectionData *selection_data,
+ guint WXUNUSED(info),
+ guint WXUNUSED(time),
+ gpointer WXUNUSED(data) )
{
if (!wxTheClipboard) return;
-
- wxNode *node = wxTheClipboard->m_dataObjects.First();
-
- while (node)
+
+ if (!wxTheClipboard->m_data) return;
+
+ wxDataObject *data = wxTheClipboard->m_data;
+
+ wxDataFormat format( selection_data->target );
+
+ if (!data->IsSupportedFormat( format )) return;
+
+ /* this will fail for composite formats */
+ if (format.GetType() == wxDF_TEXT)
{
- wxDataObject *data_object = (wxDataObject *)node->Data();
-
- if (data_object->m_formatAtom != selection_data->target)
- {
- node = node->Next();
- break;
- }
-
- switch (data_object->GetFormat())
- {
- case wxDF_TEXT:
- {
- wxTextDataObject *text_object = (wxTextDataObject*) data_object;
-
- wxString text = text_object->GetText();
-
- char *s = WXSTRINGCAST text;
- int len = (int) text.Length();
-
- gtk_selection_data_set(
- selection_data,
- GDK_SELECTION_TYPE_STRING,
- 8*sizeof(gchar),
- (unsigned char*) s,
- len );
-
- break;
- }
-
- case wxDF_BITMAP:
- {
- // wxBitmapDataObject *private_object = (wxBitmapDataObject*) data_object;
-
- // how do we do that ?
-
- break;
- }
-
- case wxDF_PRIVATE:
- {
- wxPrivateDataObject *private_object = (wxPrivateDataObject*) data_object;
-
- if (private_object->GetDataSize() == 0) return;
-
- gtk_selection_data_set(
- selection_data,
- GDK_SELECTION_TYPE_STRING,
- 8*sizeof(gchar),
- (unsigned char*) private_object->GetData(),
- (int) private_object->GetDataSize() );
- }
-
- default:
- break;
- }
-
- node = node->Next();
+ wxTextDataObject *text_object = (wxTextDataObject*) data;
+ wxString text( text_object->GetText() );
+
+#if wxUSE_UNICODE
+ const wxWX2MBbuf s = text.mbc_str();
+ int len = strlen(s);
+#else // more efficient in non-Unicode
+ const char *s = text.c_str();
+ int len = (int) text.Length();
+#endif
+ gtk_selection_data_set(
+ selection_data,
+ GDK_SELECTION_TYPE_STRING,
+ 8*sizeof(gchar),
+ (unsigned char*) (const char*) s,
+ len );
+
+ return;
}
+
+ int size = data->GetDataSize( format );
+
+ if (size == 0) return;
+
+ char *d = new char[size];
+
+ data->GetDataHere( selection_data->target, (void*) d );
+
+ gtk_selection_data_set(
+ selection_data,
+ GDK_SELECTION_TYPE_STRING,
+ 8*sizeof(gchar),
+ (unsigned char*) d,
+ size );
}
//-----------------------------------------------------------------------------
{
m_open = FALSE;
- m_dataObjects.DeleteContents( TRUE );
-
+ m_ownsClipboard = FALSE;
+ m_ownsPrimarySelection = FALSE;
+
+ m_data = (wxDataObject*) NULL;
m_receivedData = (wxDataObject*) NULL;
+ /* we use m_targetsWidget to query what formats are available */
+
+ m_targetsWidget = gtk_window_new( GTK_WINDOW_POPUP );
+ gtk_widget_realize( m_targetsWidget );
+
+ gtk_signal_connect( GTK_OBJECT(m_targetsWidget),
+ "selection_received",
+ GTK_SIGNAL_FUNC( targets_selection_received ),
+ (gpointer) this );
+
+ /* we use m_clipboardWidget to get and to offer data */
+
m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
gtk_widget_realize( m_clipboardWidget );
- gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
+ gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
+ "selection_received",
+ GTK_SIGNAL_FUNC( selection_received ),
+ (gpointer) this );
+
+ gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
"selection_clear_event",
- GTK_SIGNAL_FUNC( selection_clear ),
- (gpointer) NULL );
-
+ GTK_SIGNAL_FUNC( selection_clear_clip ),
+ (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_formatSupported = FALSE;
m_targetRequested = 0;
+
+ m_usePrimary = FALSE;
}
wxClipboard::~wxClipboard()
{
- Clear();
-
+ Clear();
+
if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
+ if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget );
}
void wxClipboard::Clear()
{
- if (m_dataObjects.GetCount())
- {
+ if (m_data)
+ {
+#if wxUSE_THREADS
+ /* disable GUI threads */
+ wxapp_uninstall_thread_wakeup();
+#endif
+
/* 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 (gdk_selection_owner_get( g_clipboardAtom) == m_clipboardWidget->window)
+ if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
+ {
+ m_waiting = TRUE;
+
+ gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom,
+ (guint32) GDK_CURRENT_TIME );
+
+ while (m_waiting) gtk_main_iteration();
+ }
+
+ if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
{
- gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME );
+ m_waiting = TRUE;
+
+ gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY,
+ (guint32) GDK_CURRENT_TIME );
+
+ while (m_waiting) gtk_main_iteration();
+ }
+
+ if (m_data)
+ {
+ delete m_data;
+ m_data = (wxDataObject*) NULL;
}
-
- m_dataObjects.Clear();
+
+#if wxUSE_THREADS
+ /* re-enable GUI threads */
+ wxapp_install_thread_wakeup();
+#endif
}
-
+
m_targetRequested = 0;
-
m_formatSupported = FALSE;
}
bool wxClipboard::Open()
{
- wxCHECK_MSG( !m_open, FALSE, "clipboard already open" );
-
+ wxCHECK_MSG( !m_open, FALSE, wxT("clipboard already open") );
+
m_open = TRUE;
-
+
return TRUE;
}
bool wxClipboard::SetData( wxDataObject *data )
{
- wxCHECK_MSG( data, FALSE, "data is invalid" );
-
- wxNode *node = m_dataObjects.First();
-
- while (node)
- {
- wxDataObject *d = (wxDataObject*)node->Data();
-
- if (d->GetFormat() == data->GetFormat())
- {
- m_dataObjects.DeleteNode( node );
-
- break;
- }
-
- node = node->Next();
- }
-
- m_dataObjects.Append( data );
-
- wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
-
- if (data->GetFormat() == wxDF_PRIVATE)
+ wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
+
+ wxCHECK_MSG( data, FALSE, wxT("data is invalid") );
+
+ Clear();
+
+ return AddData( data );
+}
+
+bool wxClipboard::AddData( wxDataObject *data )
+{
+ wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
+
+ wxCHECK_MSG( data, FALSE, wxT("data is invalid") );
+
+ /* we can only store one wxDataObject */
+ Clear();
+
+ m_data = data;
+
+ /* get formats from wxDataObjects */
+ wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
+ m_data->GetAllFormats( array );
+
+ /* primary selection or clipboard */
+ GdkAtom clipboard = m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
+ : g_clipboardAtom;
+
+
+ for (size_t i = 0; i < m_data->GetFormatCount(); i++)
{
- wxPrivateDataObject* pd = (wxPrivateDataObject*) data;
-
- wxCHECK_MSG( !pd->GetId().IsEmpty(), FALSE, "private clipboard format requires ID string" );
-
- data->m_formatAtom = GetTargetAtom( data->GetFormat(), pd->GetId() );
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("wxClipboard now supports atom %s"),
+ array[i].GetId().c_str() );
+
+ gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
+ clipboard,
+ array[i],
+ 0 ); /* what is info ? */
}
+
+ delete[] array;
+
+ gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
+ "selection_get",
+ GTK_SIGNAL_FUNC(selection_handler),
+ (gpointer) NULL );
+
+#if wxUSE_THREADS
+ /* disable GUI threads */
+ wxapp_uninstall_thread_wakeup();
+#endif
+
+ /* Tell the world we offer clipboard data */
+ bool res = (gtk_selection_owner_set( m_clipboardWidget,
+ clipboard,
+ (guint32) GDK_CURRENT_TIME ));
+
+ if (m_usePrimary)
+ m_ownsPrimarySelection = res;
else
- {
- data->m_formatAtom = GetTargetAtom( data->GetFormat() );
- }
-
- // Add handlers if someone requests data
-
- gtk_selection_add_handler( m_clipboardWidget,
- g_clipboardAtom,
- data->m_formatAtom,
- selection_handler,
- NULL );
-
- // Tell the world we offer clipboard data
-
- if (!gtk_selection_owner_set( m_clipboardWidget,
- g_clipboardAtom,
- GDK_CURRENT_TIME ))
- {
- return FALSE;
- }
-
- return TRUE;
+ m_ownsClipboard = res;
+
+#if wxUSE_THREADS
+ /* re-enable GUI threads */
+ wxapp_install_thread_wakeup();
+#endif
+
+ return res;
}
void wxClipboard::Close()
{
- wxCHECK_RET( m_open, "clipboard not open" );
-
+ wxCHECK_RET( m_open, wxT("clipboard not open") );
+
m_open = FALSE;
}
-bool wxClipboard::IsSupportedFormat( wxDataFormat format, const wxString &id )
+bool wxClipboard::IsOpened() const
{
- m_targetRequested = GetTargetAtom( format, id );
-
- if (m_targetRequested == 0) return FALSE;
-
- // add handler for target (= format) query
-
- gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
- "selection_received",
- GTK_SIGNAL_FUNC( targets_selection_received ),
- (gpointer) this );
-
- m_formatSupported = FALSE;
-
- // perform query. this will set m_formatSupported to
- // TRUE if m_targetRequested is supported
-
- 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;
+ return m_open;
}
-bool wxClipboard::GetData( wxDataObject *data )
+bool wxClipboard::IsSupported( const wxDataFormat& format )
{
- wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
-
- m_receivedData = data;
-
- wxCHECK_MSG( m_receivedData, FALSE, "invalid data object" );
-
- if (m_receivedData->GetFormat() == wxDF_PRIVATE)
- {
- wxPrivateDataObject* pd = (wxPrivateDataObject*) m_receivedData;
-
- wxCHECK_MSG( !pd->GetId().IsEmpty(), FALSE, "private clipboard format requires ID string" );
-
- m_targetRequested = GetTargetAtom( m_receivedData->GetFormat(), pd->GetId() );
- }
- else
- {
- m_targetRequested = GetTargetAtom( m_receivedData->GetFormat() );
- }
-
- data->m_formatAtom = m_targetRequested;
-
- wxCHECK_MSG( m_targetRequested, FALSE, "unsupported clipboard format" );
-
+ /* reentrance problems */
+ if (m_waiting) return FALSE;
+
+ /* store requested format to be asked for by callbacks */
+ m_targetRequested = format;
+
+#if 0
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("wxClipboard:IsSupported: requested format: %s"),
+ format.GetId().c_str() );
+#endif
+
+ wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
+
m_formatSupported = 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 );
-
- wxCHECK_MSG( m_formatSupported, FALSE, "error retrieving data from clipboard" );
-
+
+ /* perform query. this will set m_formatSupported to
+ TRUE if m_targetRequested is supported.
+ also, we have to wait for the "answer" from the
+ clipboard owner which is an asynchronous process.
+ therefore we set m_waiting = TRUE here and wait
+ until the callback "targets_selection_received"
+ sets it to FALSE */
+
+ m_waiting = TRUE;
+
+ gtk_selection_convert( m_targetsWidget,
+ m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
+ : g_clipboardAtom,
+ g_targetsAtom,
+ (guint32) GDK_CURRENT_TIME );
+
+ while (m_waiting) gtk_main_iteration();
+
+ if (!m_formatSupported) return FALSE;
+
return TRUE;
}
-GdkAtom wxClipboard::GetTargetAtom( wxDataFormat format, const wxString &id )
+bool wxClipboard::GetData( wxDataObject& data )
{
- // What is X representation of that format?
-
- switch (format)
+ wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
+
+ /* get formats from wxDataObjects */
+ wxDataFormat *array = new wxDataFormat[ data.GetFormatCount() ];
+ data.GetAllFormats( array );
+
+ for (size_t i = 0; i < data.GetFormatCount(); i++)
{
- 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
-
- return gdk_atom_intern( WXSTRINGCAST( id ), FALSE );
- }
-
- default:
- {
- return (GdkAtom) 0;
- }
- }
-
- return (GdkAtom) 0;
-}
+ wxDataFormat format( array[i] );
-//-----------------------------------------------------------------------------
-// wxClipboardModule
-//-----------------------------------------------------------------------------
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("wxClipboard::GetData: requested format: %s"),
+ format.GetId().c_str() );
-IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule)
+ /* is data supported by clipboard ? */
-bool wxClipboardModule::OnInit()
-{
- wxTheClipboard = new wxClipboard();
-
- return TRUE;
-}
+ /* store requested format to be asked for by callbacks */
+ m_targetRequested = format;
-void wxClipboardModule::OnExit()
-{
- if (wxTheClipboard) delete wxTheClipboard;
- wxTheClipboard = (wxClipboard*) NULL;
+ wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
+
+ m_formatSupported = FALSE;
+
+ /* perform query. this will set m_formatSupported to
+ TRUE if m_targetRequested is supported.
+ also, we have to wait for the "answer" from the
+ clipboard owner which is an asynchronous process.
+ therefore we set m_waiting = TRUE here and wait
+ until the callback "targets_selection_received"
+ sets it to FALSE */
+
+ m_waiting = TRUE;
+
+ gtk_selection_convert( m_targetsWidget,
+ m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
+ : g_clipboardAtom,
+ g_targetsAtom,
+ (guint32) GDK_CURRENT_TIME );
+
+ while (m_waiting) gtk_main_iteration();
+
+ if (!m_formatSupported) continue;
+
+ /* store pointer to data object to be filled up by callbacks */
+ m_receivedData = &data;
+
+ /* store requested format to be asked for by callbacks */
+ m_targetRequested = format;
+
+ wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
+
+ /* start query */
+ m_formatSupported = FALSE;
+
+ /* ask for clipboard contents. this will set
+ m_formatSupported to TRUE if m_targetRequested
+ is supported.
+ also, we have to wait for the "answer" from the
+ clipboard owner which is an asynchronous process.
+ therefore we set m_waiting = TRUE here and wait
+ until the callback "targets_selection_received"
+ sets it to FALSE */
+
+ m_waiting = TRUE;
+
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("wxClipboard::GetData: format found, start convert") );
+
+ gtk_selection_convert( m_clipboardWidget,
+ m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
+ : g_clipboardAtom,
+ m_targetRequested,
+ (guint32) GDK_CURRENT_TIME );
+
+ while (m_waiting) gtk_main_iteration();
+
+ /* this is a true error as we checked for the presence of such data before */
+ wxCHECK_MSG( m_formatSupported, FALSE, wxT("error retrieving data from clipboard") );
+
+ /* return success */
+ delete[] array;
+ return TRUE;
+ }
+
+ wxLogTrace( TRACE_CLIPBOARD,
+ wxT("wxClipboard::GetData: format not found") );
+
+ /* return failure */
+ delete[] array;
+ return FALSE;
}
+
+#endif
+ // wxUSE_CLIPBOARD
+
projects / wxWidgets.git / blobdiff