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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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25
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15 public class TaskController: IProgressNotifier, ITaskController
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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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25
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25 public event EventHandler Cancelled;
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7
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26 public event EventHandler<ValueEventArgs<string>> MessageUpdated;
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27 public event EventHandler<ValueEventArgs<float>> ProgressUpdated;
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28 public event EventHandler<ProgressInitEventArgs> ProgressInit;
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29
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30 public TaskController()
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31 {
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32 m_lock = new Object();
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33 }
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34
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35 public string Message
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36 {
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37 get
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38 {
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39 lock (m_lock)
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40 return m_message;
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41 }
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42 set
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43 {
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44 lock (m_lock)
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45 {
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46 m_message = value;
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47 OnMessageUpdated();
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48 }
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49 }
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50 }
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51
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52 public float CurrentProgress
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53 {
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54 get
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55 {
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56 lock (m_lock)
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57 return m_current;
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58 }
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59 set
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60 {
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61 lock (m_lock)
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62 {
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63 var prev = m_current;
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64 m_current = value;
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65 if (m_current >= m_max)
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66 m_current = m_max;
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67 if (m_current != prev)
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68 OnProgressUpdated();
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69 }
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70 }
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71 }
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72
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73 public void InitProgress(float current, float max, string message)
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74 {
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75 if (max < 0)
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76 throw new ArgumentOutOfRangeException("max");
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77 if (current < 0 || current > max)
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78 throw new ArgumentOutOfRangeException("current");
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79
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80 lock(m_lock) {
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81 m_current = current;
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82 m_max = max;
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83 m_message = message;
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84 OnProgressInit();
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85 }
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86 }
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87
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25
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88 public bool IsCancelled {
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12
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89 get {
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90 lock (m_lock)
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91 return m_cancelled;
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92 }
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93 }
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94
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95 public bool Cancel() {
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96 lock (m_lock) {
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97 if (!m_cancelled) {
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98 m_cancelled = true;
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99 return true;
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100 } else {
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101 return false;
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102 }
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103 }
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104 }
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105
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25
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106 protected virtual void OnCancelled() {
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107 var temp = Cancelled;
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108 if (temp != null) {
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109 temp(this,new EventArgs());
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110 }
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111 }
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112
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7
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113 protected virtual void OnMessageUpdated()
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114 {
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115 var temp = MessageUpdated;
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116 if (temp != null)
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117 {
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118 temp(this, new ValueEventArgs<string>(m_message));
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119 }
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120 }
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121
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122 protected virtual void OnProgressUpdated()
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123 {
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124 var temp = ProgressUpdated;
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125 if (temp != null)
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126 {
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127 temp(this,new ValueEventArgs<float>(m_current));
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128 }
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129 }
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130
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131 protected virtual void OnProgressInit()
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132 {
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133 var temp = ProgressInit;
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134 if (temp != null)
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135 {
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136 temp(this, new ProgressInitEventArgs(m_current,m_max, m_message));
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137 }
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138 }
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139 }
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140 }
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