diff layer/LayerFactory.h @ 0:fc9323a41f5a

start base : Sonic Visualiser sv1-1.0rc1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layer/LayerFactory.h	Fri May 11 09:08:14 2007 +0000
@@ -0,0 +1,91 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Visualiser
+    An audio file viewer and annotation editor.
+    Centre for Digital Music, Queen Mary, University of London.
+    This file copyright 2006 Chris Cannam.
+    
+    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 included with this distribution for more information.
+*/
+
+#ifndef _LAYER_FACTORY_H_
+#define _LAYER_FACTORY_H_
+
+#include <QString>
+#include <set>
+
+class Layer;
+class Model;
+
+class LayerFactory
+{
+public:
+    enum LayerType {
+
+	// Standard layers
+	Waveform,
+	Spectrogram,
+	TimeRuler,
+	TimeInstants,
+	TimeValues,
+	Notes,
+	Text,
+	Colour3DPlot,
+        Spectrum,
+        Slice,
+
+	// Layers with different initial parameters
+	MelodicRangeSpectrogram,
+	PeakFrequencySpectrogram,
+
+	// Not-a-layer-type
+	UnknownLayer = 255
+    };
+
+    static LayerFactory *getInstance();
+    
+    virtual ~LayerFactory();
+
+    typedef std::set<LayerType> LayerTypeSet;
+    LayerTypeSet getValidLayerTypes(Model *model);
+    LayerTypeSet getValidEmptyLayerTypes();
+
+    LayerType getLayerType(const Layer *);
+
+    Layer *createLayer(LayerType type);
+
+    QString getLayerPresentationName(LayerType type);
+
+    bool isLayerSliceable(const Layer *);
+
+    void setModel(Layer *layer, Model *model);
+    Model *createEmptyModel(LayerType type, Model *baseModel);
+
+    int getChannel(Layer *layer);
+    void setChannel(Layer *layer, int channel);
+
+    QString getLayerIconName(LayerType);
+    QString getLayerTypeName(LayerType);
+    LayerType getLayerTypeForName(QString);
+
+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);
+	if (!model) return false;
+	layer->setModel(model);
+	return true;
+    }
+
+    static LayerFactory *m_instance;
+};
+
+#endif
+