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7
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1 using System;
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2 using System.Collections.Generic;
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3 using System.Linq;
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4 using System.Text;
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5 using System.Threading;
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6
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7 namespace Implab
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8 {
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9 /// <summary>
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10 /// This class allows to interact with asyncronuos task.
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11 /// </summary>
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12 /// <remarks>
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13 /// Members of this object are thread safe.
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14 /// </remarks>
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12
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15 class TaskController: IProgressNotifier, ITaskController, ICancellable
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7
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16 {
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10
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17 readonly object m_lock;
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18 string m_message;
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19
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20 float m_current;
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21 float m_max;
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22
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12
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23 bool m_cancelled;
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24
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7
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25 public event EventHandler<ValueEventArgs<string>> MessageUpdated;
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26 public event EventHandler<ValueEventArgs<float>> ProgressUpdated;
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27 public event EventHandler<ProgressInitEventArgs> ProgressInit;
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28
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29 public TaskController()
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30 {
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31 m_lock = new Object();
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32 }
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33
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34 public string Message
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35 {
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36 get
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37 {
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38 lock (m_lock)
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39 return m_message;
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40 }
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41 set
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42 {
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43 lock (m_lock)
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44 {
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45 m_message = value;
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46 OnMessageUpdated();
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47 }
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48 }
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49 }
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50
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51 public float CurrentProgress
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52 {
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53 get
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54 {
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55 lock (m_lock)
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56 return m_current;
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57 }
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58 set
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59 {
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60 lock (m_lock)
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61 {
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62 var prev = m_current;
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63 m_current = value;
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64 if (m_current >= m_max)
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65 m_current = m_max;
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66 if (m_current != prev)
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67 OnProgressUpdated();
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68 }
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69 }
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70 }
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71
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72 public void InitProgress(float current, float max, string message)
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73 {
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74 if (max < 0)
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75 throw new ArgumentOutOfRangeException("max");
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76 if (current < 0 || current > max)
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77 throw new ArgumentOutOfRangeException("current");
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78
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79 lock(m_lock) {
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80 m_current = current;
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81 m_max = max;
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82 m_message = message;
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83 OnProgressInit();
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84 }
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85 }
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86
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12
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87 public bool Cancelled {
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88 get {
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89 lock (m_lock)
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90 return m_cancelled;
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91 }
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92 }
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93
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94 public bool Cancel() {
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95 lock (m_lock) {
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96 if (!m_cancelled) {
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97 m_cancelled = true;
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98 return true;
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99 } else {
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100 return false;
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101 }
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102 }
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103 }
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104
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7
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105 protected virtual void OnMessageUpdated()
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106 {
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107 var temp = MessageUpdated;
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108 if (temp != null)
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109 {
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110 temp(this, new ValueEventArgs<string>(m_message));
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111 }
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112 }
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113
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114 protected virtual void OnProgressUpdated()
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115 {
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116 var temp = ProgressUpdated;
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117 if (temp != null)
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118 {
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119 temp(this,new ValueEventArgs<float>(m_current));
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120 }
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121 }
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122
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123 protected virtual void OnProgressInit()
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124 {
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125 var temp = ProgressInit;
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126 if (temp != null)
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127 {
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128 temp(this, new ProgressInitEventArgs(m_current,m_max, m_message));
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129 }
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130 }
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131 }
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132 }
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