Initial import from SVN

ui/audio/FilterWidget.hpp

@@ -0,0 +1,46 @@
+#ifndef FILTER_WIDGET_HPP
+#define FILTER_WIDGET_HPP
+
+#include <boost/foreach.hpp>
+#include <string>
+#include <list>
+
+#include <Wt/WSignal>
+#include <Wt/WContainerWidget>
+
+#include "database/SqlQuery.hpp"
+
+class FilterWidget : public Wt::WContainerWidget {
+
+	public:
+
+		struct Constraint {
+			WhereClause	where;		// WHERE SQL clause
+		};
+
+		FilterWidget(Wt::WContainerWidget* parent = 0) : Wt::WContainerWidget(parent) {}
+		virtual ~FilterWidget() {}
+
+		// Refresh filter Widget using constraints created by parent filters
+		virtual void refresh(const Constraint& constraint) = 0;
+
+		// Update constraints for child filters
+		virtual void getConstraint(Constraint& constraint) = 0;
+
+		// Emitted when a constraint has changed
+		Wt::Signal<void>& update() { return _update; };
+
+	protected:
+
+		void emitUpdate()	{ _update.emit(); }
+
+	private:
+
+		Wt::Signal<void> _update;
+};
+
+
+
+
+
+#endif