comparison data/model/ImageModel.h @ 302:726b32522e3f

* Phase 1 of an image layer.

+/* -*- 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 2006-2007 Chris Cannam and QMUL.
+    
+    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 _IMAGE_MODEL_H_
+#define _IMAGE_MODEL_H_
+
+#include "SparseModel.h"
+#include "base/XmlExportable.h"
+#include "base/RealTime.h"
+
+/**
+ * Image point type for use in a SparseModel.  This represents an
+ * image, identified by filename, at a given time.  The filename can
+ * be empty, in which case we instead have a space to put an image in.
+ */
+
+struct ImagePoint : public XmlExportable
+{
+public:
+    ImagePoint(long _frame) : frame(_frame) { }
+    ImagePoint(long _frame, QString _image, QString _label) :
+        frame(_frame), image(_image), label(_label) { }
+
+    int getDimensions() const { return 1; }
+    
+    long frame;
+    QString image;
+    QString label;
+    
+    QString toXmlString(QString indent = "",
+			QString extraAttributes = "") const
+    {
+	return QString("%1<point frame=\"%2\" image=\"%3\" label=\"%4\" %5/>\n")
+	    .arg(indent).arg(frame)
+            .arg(encodeEntities(image))
+            .arg(encodeEntities(label))
+            .arg(extraAttributes);
+    }
+
+    QString toDelimitedDataString(QString delimiter, size_t sampleRate) const
+    {
+        QStringList list;
+        list << RealTime::frame2RealTime(frame, sampleRate).toString().c_str();
+        list << image;
+        list << label;
+        return list.join(delimiter);
+    }
+
+    struct Comparator {
+	bool operator()(const ImagePoint &p1,
+			const ImagePoint &p2) const {
+	    if (p1.frame != p2.frame) return p1.frame < p2.frame;
+            if (p1.label != p2.label) return p1.label < p2.label;
+	    return p1.image < p2.image;
+	}
+    };
+    
+    struct OrderComparator {
+	bool operator()(const ImagePoint &p1,
+			const ImagePoint &p2) const {
+	    return p1.frame < p2.frame;
+	}
+    };
+};
+
+
+// Make this a class rather than a typedef so it can be predeclared.
+
+class ImageModel : public SparseModel<ImagePoint>
+{
+public:
+    ImageModel(size_t sampleRate, size_t resolution, bool notifyOnAdd = true) :
+	SparseModel<ImagePoint>(sampleRate, resolution, notifyOnAdd)
+    { }
+
+    virtual void toXml(QTextStream &out,
+                       QString indent = "",
+                       QString extraAttributes = "") const
+    {
+        SparseModel<ImagePoint>::toXml
+	    (out, 
+             indent,
+	     QString("%1 subtype=\"image\"")
+	     .arg(extraAttributes));
+    }
+
+    /**
+     * Command to change the image for a point.
+     */
+    class ChangeImageCommand : public Command
+    {
+    public:
+        ChangeImageCommand(ImageModel *model,
+                           const ImagePoint &point,
+                           QString newImage,
+                           QString newLabel) :
+	    m_model(model), m_oldPoint(point), m_newPoint(point) {
+	    m_newPoint.image = newImage;
+            m_newPoint.label = newLabel;
+	}
+
+	virtual QString getName() const { return tr("Edit Image"); }
+
+	virtual void execute() { 
+	    m_model->deletePoint(m_oldPoint);
+	    m_model->addPoint(m_newPoint);
+	    std::swap(m_oldPoint, m_newPoint);
+	}
+
+	virtual void unexecute() { execute(); }
+
+    private:
+	ImageModel *m_model;
+	ImagePoint m_oldPoint;
+	ImagePoint m_newPoint;
+    };
+};
+
+
+#endif
+
+
+