1 files changed, 142 insertions, 0 deletions
diff --git a/libk3b/tools/k3bthreadwidget.cpp b/libk3b/tools/k3bthreadwidget.cpp
new file mode 100644
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--- /dev/null
+++ b/libk3b/tools/k3bthreadwidget.cpp
@@ -0,0 +1,142 @@
+/* 
+ *
+ * $Id: k3bthreadwidget.cpp 619556 2007-01-03 17:38:12Z trueg $
+ * Copyright (C) 2005 Sebastian Trueg <[email protected]>
+ *
+ * This file is part of the K3b project.
+ * Copyright (C) 1998-2007 Sebastian Trueg <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * See the file "COPYING" for the exact licensing terms.
+ */
+
+#include "k3bthreadwidget.h"
+#include "k3bdeviceselectiondialog.h"
+#include <k3bdevice.h>
+
+#include <qevent.h>
+#include <qapplication.h>
+#include <qwaitcondition.h>
+
+
+class K3bThreadWidget::Data
+{
+public:
+  int id;
+  void* data;
+  QWaitCondition con;
+};
+
+
+class K3bThreadWidget::DeviceSelectionEvent : public QCustomEvent
+{
+public:
+  DeviceSelectionEvent( QWidget* parent, const QString& text, int id )
+    : QCustomEvent( QEvent::User + 22 ),
+      m_parent(parent),
+      m_text(text),
+      m_id(id) {
+  }
+
+  QWidget* parent() const { return m_parent; }
+  const QString& text() const { return m_text; }
+  int id() const { return m_id; }
+
+private:
+  QWidget* m_parent;
+  QString m_text;
+  int m_id;
+};
+
+
+K3bThreadWidget* K3bThreadWidget::s_instance = 0;
+
+
+K3bThreadWidget::K3bThreadWidget()
+  : QObject(),
+    m_idCounter(1)
+{
+  m_dataMap.setAutoDelete(true);
+  s_instance = this;
+}
+
+
+K3bThreadWidget::~K3bThreadWidget()
+{
+  s_instance = 0;
+}
+
+
+int K3bThreadWidget::getNewId()
+{
+  // create new data
+  Data* data = new Data;
+  data->id = m_idCounter++;
+  data->data = 0;
+  m_dataMap.insert( data->id, data );
+  return data->id;
+}
+
+
+void K3bThreadWidget::clearId( int id )
+{
+  m_dataMap.remove( id );
+}
+
+
+K3bThreadWidget::Data* K3bThreadWidget::data( int id )
+{
+  return m_dataMap[id];
+}
+
+
+K3bThreadWidget* K3bThreadWidget::instance()
+{
+  if( !s_instance )
+    s_instance = new K3bThreadWidget();
+  return s_instance;
+}
+
+
+// static
+K3bDevice::Device* K3bThreadWidget::selectDevice( QWidget* parent, 
+						  const QString& text )
+{
+  // request a new data set
+  Data* data = K3bThreadWidget::instance()->data( K3bThreadWidget::instance()->getNewId() );
+
+  // inform the instance about the request
+  QApplication::postEvent( K3bThreadWidget::instance(),
+			   new K3bThreadWidget::DeviceSelectionEvent( parent, text, data->id ) );
+
+  // wait for the result to be ready
+  data->con.wait();
+
+  K3bDevice::Device* dev = static_cast<K3bDevice::Device*>( data->data );
+
+  // delete the no longer needed data
+  K3bThreadWidget::instance()->clearId( data->id );
+
+  return dev;
+}
+
+
+void K3bThreadWidget::customEvent( QCustomEvent* e )
+{
+  if( DeviceSelectionEvent* dse = dynamic_cast<DeviceSelectionEvent*>(e) ) {
+    // create dialog
+    K3bDevice::Device* dev = K3bDeviceSelectionDialog::selectDevice( dse->parent(), dse->text() );
+
+    // return it to the thread
+    Data* dat = data( dse->id() );
+    dat->data = static_cast<void*>( dev );
+
+    // wake the thread
+    dat->con.wakeAll();
+  }
+}
+
+#include "k3bthreadwidget.moc"