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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 Sonic Visualiser
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5 An audio file viewer and annotation editor.
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6 Centre for Digital Music, Queen Mary, University of London.
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7 This file copyright 2006-2007 Chris Cannam and QMUL.
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8
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9 This program is free software; you can redistribute it and/or
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10 modify it under the terms of the GNU General Public License as
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11 published by the Free Software Foundation; either version 2 of the
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12 License, or (at your option) any later version. See the file
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13 COPYING included with this distribution for more information.
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14 */
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15
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16 #ifndef _IMAGE_MODEL_H_
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17 #define _IMAGE_MODEL_H_
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18
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19 #include "SparseModel.h"
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20 #include "base/XmlExportable.h"
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21 #include "base/RealTime.h"
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22
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23 /**
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24 * Image point type for use in a SparseModel. This represents an
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25 * image, identified by filename, at a given time. The filename can
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26 * be empty, in which case we instead have a space to put an image in.
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27 */
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28
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29 struct ImagePoint : public XmlExportable
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30 {
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31 public:
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32 ImagePoint(long _frame) : frame(_frame) { }
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33 ImagePoint(long _frame, QString _image, QString _label) :
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34 frame(_frame), image(_image), label(_label) { }
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35
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36 int getDimensions() const { return 1; }
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37
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38 long frame;
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39 QString image;
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40 QString label;
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41
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42 void toXml(QTextStream &stream,
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43 QString indent = "",
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44 QString extraAttributes = "") const
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45 {
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46 stream <<
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47 QString("%1<point frame=\"%2\" image=\"%3\" label=\"%4\" %5/>\n")
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48 .arg(indent).arg(frame)
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49 .arg(encodeEntities(image))
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50 .arg(encodeEntities(label))
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51 .arg(extraAttributes);
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52 }
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53
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54 QString toDelimitedDataString(QString delimiter, size_t sampleRate) const
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55 {
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56 QStringList list;
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57 list << RealTime::frame2RealTime(frame, sampleRate).toString().c_str();
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58 list << image;
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59 if (label != "") list << label;
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60 return list.join(delimiter);
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61 }
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62
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63 struct Comparator {
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64 bool operator()(const ImagePoint &p1,
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65 const ImagePoint &p2) const {
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66 if (p1.frame != p2.frame) return p1.frame < p2.frame;
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67 if (p1.label != p2.label) return p1.label < p2.label;
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68 return p1.image < p2.image;
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69 }
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70 };
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71
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72 struct OrderComparator {
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73 bool operator()(const ImagePoint &p1,
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74 const ImagePoint &p2) const {
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75 return p1.frame < p2.frame;
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76 }
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77 };
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78 };
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79
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80
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81 // Make this a class rather than a typedef so it can be predeclared.
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82
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83 class ImageModel : public SparseModel<ImagePoint>
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84 {
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85 public:
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86 ImageModel(size_t sampleRate, size_t resolution, bool notifyOnAdd = true) :
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87 SparseModel<ImagePoint>(sampleRate, resolution, notifyOnAdd)
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88 { }
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89
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90 virtual void toXml(QTextStream &out,
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91 QString indent = "",
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92 QString extraAttributes = "") const
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93 {
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94 SparseModel<ImagePoint>::toXml
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95 (out,
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96 indent,
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97 QString("%1 subtype=\"image\"")
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98 .arg(extraAttributes));
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99 }
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100
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101 /**
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102 * Command to change the image for a point.
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103 */
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104 class ChangeImageCommand : public Command
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105 {
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106 public:
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107 ChangeImageCommand(ImageModel *model,
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108 const ImagePoint &point,
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109 QString newImage,
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110 QString newLabel) :
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111 m_model(model), m_oldPoint(point), m_newPoint(point) {
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112 m_newPoint.image = newImage;
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113 m_newPoint.label = newLabel;
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114 }
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115
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116 virtual QString getName() const { return tr("Edit Image"); }
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117
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118 virtual void execute() {
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119 m_model->deletePoint(m_oldPoint);
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120 m_model->addPoint(m_newPoint);
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121 std::swap(m_oldPoint, m_newPoint);
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122 }
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123
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124 virtual void unexecute() { execute(); }
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125
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126 private:
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127 ImageModel *m_model;
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128 ImagePoint m_oldPoint;
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129 ImagePoint m_newPoint;
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130 };
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131 };
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132
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133
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134 #endif
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135
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136
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137
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