comparison layer/LayerFactory.h @ 0:2a4f26e85b4c

initial import

+/* -*- c-basic-offset: 4 -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    A waveform viewer and audio annotation editor.
+    Chris Cannam, Queen Mary University of London, 2005
+    
+    This is experimental software.  Not for distribution.
+*/
+
+#ifndef _LAYER_FACTORY_H_
+#define _LAYER_FACTORY_H_
+
+#include <QString>
+#include <set>
+
+class Layer;
+class View;
+class Model;
+
+class LayerFactory
+{
+public:
+    enum LayerType {
+
+	// Standard layers
+	Waveform,
+	Spectrogram,
+	TimeRuler,
+	TimeInstants,
+	TimeValues,
+	Colour3DPlot,
+
+	// Layers with different initial parameters
+	MelodicRangeSpectrogram,
+
+	// Not-a-layer-type
+	UnknownLayer = 255
+    };
+
+    static LayerFactory *instance();
+    
+    virtual ~LayerFactory();
+
+    typedef std::set<LayerType> LayerTypeSet;
+    LayerTypeSet getValidLayerTypes(Model *model);
+
+    LayerType getLayerType(Layer *);
+
+    Layer *createLayer(LayerType type, View *view,
+		       Model *model = 0, int channel = -1);
+
+    QString getLayerPresentationName(LayerType type);
+
+    void setModel(Layer *layer, Model *model);
+
+protected:
+    template <typename LayerClass, typename ModelClass>
+    bool trySetModel(Layer *layerBase, Model *modelBase) {
+	LayerClass *layer = dynamic_cast<LayerClass *>(layerBase);
+	if (!layer) return false;
+	ModelClass *model = dynamic_cast<ModelClass *>(modelBase);
+	layer->setModel(model);
+	return true;
+    }
+
+    static LayerFactory *m_instance;
+};
+
+#endif
+