// Author: Robert Roebling
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling
-// Licence: wxWindows licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
#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_clipboardAtom = 0;
GdkAtom g_targetsAtom = 0;
//-----------------------------------------------------------------------------
/* 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 )
{
- char *name = gdk_atom_name (atoms[i]);
- if (name) printf( "Format available: %s.\n", name );
-
- 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;
+ clipboard->m_waiting = FALSE;
return;
}
+
+/*
+ wxDataFormat clip( selection_data->selection );
+ wxLogDebug( wxT("selection received for targets, clipboard %s"), clip.GetId().c_str() );
+*/
+
+ // 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] );
+
+/*
+ wxLogDebug( 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->GetFormat().GetAtom() != 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().GetType())
+
+ if (!data_object)
{
- 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;
}
-
+
+ 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)
+ {
+ 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;
}
//-----------------------------------------------------------------------------
selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event )
{
if (!wxTheClipboard) return TRUE;
-
+
if (event->selection == GDK_SELECTION_PRIMARY)
{
wxTheClipboard->m_ownsPrimarySelection = 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 clipboard data. */
-
- if (wxTheClipboard->m_dataBroker)
- {
- delete wxTheClipboard->m_dataBroker;
- wxTheClipboard->m_dataBroker = (wxDataBroker*) NULL;
- }
+ /* the clipboard is no longer in our hands. we can the delete clipboard data. */
+ if (wxTheClipboard->m_data)
+ {
+ wxLogDebug( 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;
-
- if (!wxTheClipboard->m_dataBroker) return;
-
- wxNode *node = wxTheClipboard->m_dataBroker->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->GetFormat().GetAtom() != selection_data->target)
- {
- node = node->Next();
- break;
- }
-
- switch (data_object->GetFormat().GetType())
- {
- 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->GetSize() == 0) return;
-
- gtk_selection_data_set(
- selection_data,
- GDK_SELECTION_TYPE_STRING,
- 8*sizeof(gchar),
- (unsigned char*) private_object->GetData(),
- (int) private_object->GetSize() );
- }
-
- 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_ownsClipboard = FALSE;
m_ownsPrimarySelection = FALSE;
- m_dataBroker = (wxDataBroker*) NULL;
-
+ 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_clip ),
- (gpointer) NULL );
-
+ GTK_SIGNAL_FUNC( selection_clear_clip ),
+ (gpointer) NULL );
+
if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", 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_dataBroker)
- {
+ 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)
{
- gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME );
+ 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, GDK_SELECTION_PRIMARY, 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;
}
-
- if (m_dataBroker)
- {
- delete m_dataBroker;
- m_dataBroker = (wxDataBroker*) NULL;
- }
+
+#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( m_open, FALSE, "clipboard not open" );
-
- wxCHECK_MSG( data, FALSE, "data is invalid" );
-
+ 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, "clipboard not open" );
-
- wxCHECK_MSG( data, FALSE, "data is invalid" );
-
- /* if clipboard has been cleared before, create new data broker */
-
- if (!m_dataBroker) m_dataBroker = new wxDataBroker();
-
- /* add new data to list of offered data objects */
-
- m_dataBroker->Add( data );
-
- /* get native format id of new data object */
-
- GdkAtom format = data->GetFormat().GetAtom();
-
- wxCHECK_MSG( format, FALSE, "data has invalid format" );
-
- /* This should happen automatically, but to be on the safe side */
-
- m_ownsClipboard = FALSE;
- m_ownsPrimarySelection = FALSE;
-
- /* Add handlers if someone requests data */
-
+ wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
-#if (GTK_MINOR_VERSION > 0)
+ wxCHECK_MSG( data, FALSE, wxT("data is invalid") );
+
+ /* we can only store one wxDataObject */
+ Clear();
- gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
- GDK_SELECTION_PRIMARY,
- format,
- 0 ); /* what is info ? */
-
- gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
- g_clipboardAtom,
- format,
- 0 ); /* what is info ? */
-
- gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
+ 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++)
+ {
+ wxLogDebug( 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 );
-
-#else
-
- gtk_selection_add_handler( m_clipboardWidget,
- g_clipboardAtom,
- format,
- selection_handler,
- (gpointer) NULL );
-
- gtk_selection_add_handler( m_clipboardWidget,
- GDK_SELECTION_PRIMARY,
- format,
- selection_handler,
- (gpointer) NULL );
+ 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 */
-
- if (!gtk_selection_owner_set( m_clipboardWidget,
- g_clipboardAtom,
- GDK_CURRENT_TIME ))
- {
- return FALSE;
- }
- m_ownsClipboard = TRUE;
-
- if (!gtk_selection_owner_set( m_clipboardWidget,
- GDK_SELECTION_PRIMARY,
- GDK_CURRENT_TIME ))
- {
- return FALSE;
- }
- m_ownsPrimarySelection = TRUE;
-
- return TRUE;
+ bool res = (gtk_selection_owner_set( m_clipboardWidget,
+ clipboard,
+ (guint32) GDK_CURRENT_TIME ));
+
+ if (m_usePrimary)
+ m_ownsPrimarySelection = res;
+ else
+ 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::IsSupported( wxDataFormat format )
+bool wxClipboard::IsOpened() const
{
- wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
-
- /* store requested format to be asked for by callbacks */
-
- m_targetRequested = format.GetAtom();
-
- wxCHECK_MSG( m_targetRequested, FALSE, "invalid clipboard format" );
-
- /* 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;
-}
-
-bool wxClipboard::GetData( wxDataObject *data )
+ return m_open;
+}
+
+bool wxClipboard::IsSupported( const wxDataFormat& format )
{
- wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
-
- /* is data supported by clipboard ? */
-
- if (!IsSupported( data->GetFormat() )) return FALSE;
-
- /* store pointer to data object to be filled up by callbacks */
-
- m_receivedData = data;
-
+ /* reentrance problems */
+ if (m_waiting) return FALSE;
+
/* store requested format to be asked for by callbacks */
-
- m_targetRequested = data->GetFormat().GetAtom();
-
- wxCHECK_MSG( m_targetRequested, FALSE, "invalid clipboard format" );
-
- /* start query */
-
- m_formatSupported = FALSE;
-
- gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
- "selection_received",
- GTK_SIGNAL_FUNC( selection_received ),
- (gpointer) this );
+ m_targetRequested = format;
- /* ask for clipboard contents */
+/*
+ wxLogDebug( wxT("wxClipboard:IsSupported: requested format: %s"), format.GetId().c_str() );
+*/
- 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_targetRequested, FALSE, wxT("invalid clipboard format") );
- /* this is a true error as we checked for the presence of such data before */
+ m_formatSupported = FALSE;
- wxCHECK_MSG( m_formatSupported, FALSE, "error retrieving data from clipboard" );
-
- return TRUE;
-}
+ /* 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 */
-//-----------------------------------------------------------------------------
-// wxClipboardModule
-//-----------------------------------------------------------------------------
+ m_waiting = TRUE;
-IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule)
+ 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;
-bool wxClipboardModule::OnInit()
-{
- wxTheClipboard = new wxClipboard();
-
return TRUE;
}
-void wxClipboardModule::OnExit()
+bool wxClipboard::GetData( wxDataObject& data )
{
- if (wxTheClipboard) delete wxTheClipboard;
- wxTheClipboard = (wxClipboard*) NULL;
+ 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++)
+ {
+ wxDataFormat format( array[i] );
+
+ wxLogDebug( wxT("wxClipboard::GetData: requested format: %s"), format.GetId().c_str() );
+
+ /* is data supported by clipboard ? */
+
+ /* store requested format to be asked for by callbacks */
+ m_targetRequested = format;
+
+ 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;
+
+ wxLogDebug( 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;
+ }
+
+ wxLogDebug( wxT("wxClipboard::GetData: format not found") );
+
+ /* return failure */
+ delete[] array;
+ return FALSE;
}
#endif
-
// wxUSE_CLIPBOARD
projects / wxWidgets.git / blobdiff