add drag and drop onto app icon (dock etc.) support for MacOS platform.

custom_widgets/yacreader_flow_config_widget.h

@@ -0,0 +1,19 @@
+#ifndef YACREADER_FLOW_CONFIG_WIDGET_H
+#define YACREADER_FLOW_CONFIG_WIDGET_H
+
+#include <QWidget>
+
+class QRadioButton;
+
+class YACReaderFlowConfigWidget : public QWidget
+{
+	Q_OBJECT
+public:
+	QRadioButton *radio1; 
+	QRadioButton *radio2;
+	QRadioButton *radio3;
+
+	YACReaderFlowConfigWidget(QWidget * parent = 0);
+};
+
+#endif // YACREADER_FLOW_CONFIG_WIDGET_H