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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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15 class TaskController
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16 {
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17 object m_lock;
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18 string m_message;
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19 bool m_cancelled;
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20
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21 float m_current;
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22 float m_max;
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23
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24 public event EventHandler<ValueEventArgs<string>> MessageUpdated;
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25 public event EventHandler<ValueEventArgs<float>> ProgressUpdated;
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26 public event EventHandler<ProgressInitEventArgs> ProgressInit;
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27
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28 public TaskController()
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29 {
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30 m_lock = new Object();
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31 }
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32
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33 public string Message
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34 {
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35 get
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36 {
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37 lock (m_lock)
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38 return m_message;
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39 }
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40 set
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41 {
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42 lock (m_lock)
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43 {
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44 m_message = value;
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45 OnMessageUpdated();
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46 }
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47 }
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48 }
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49
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50 public float CurrentProgress
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51 {
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52 get
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53 {
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54 lock (m_lock)
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55 return m_current;
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56 }
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57 set
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58 {
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59 lock (m_lock)
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60 {
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61 var prev = m_current;
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62 m_current = value;
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63 if (m_current >= m_max)
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64 m_current = m_max;
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65 if (m_current != prev)
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66 OnProgressUpdated();
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67 }
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68 }
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69 }
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70
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71 public void InitProgress(float current, float max, string message)
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72 {
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73 if (max < 0)
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74 throw new ArgumentOutOfRangeException("max");
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75 if (current < 0 || current > max)
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76 throw new ArgumentOutOfRangeException("current");
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77
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78 lock(m_lock) {
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79 m_current = current;
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80 m_max = max;
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81 m_message = message;
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82 OnProgressInit();
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83 }
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84 }
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85
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86 protected virtual void OnMessageUpdated()
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87 {
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88 var temp = MessageUpdated;
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89 if (temp != null)
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90 {
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91 temp(this, new ValueEventArgs<string>(m_message));
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92 }
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93 }
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94
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95 protected virtual void OnProgressUpdated()
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96 {
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97 var temp = ProgressUpdated;
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98 if (temp != null)
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99 {
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100 temp(this,new ValueEventArgs<float>(m_current));
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101 }
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102 }
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103
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104 protected virtual void OnProgressInit()
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105 {
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106 var temp = ProgressInit;
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107 if (temp != null)
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108 {
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109 temp(this, new ProgressInitEventArgs(m_current,m_max, m_message));
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110 }
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111 }
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112 }
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113 }
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