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1 /* |
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2 * Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Slideshow specific timer class |
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15 * |
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16 */ |
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17 |
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18 |
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19 |
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20 |
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21 // INCLUDES |
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22 #include "shwtimer.h" |
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23 |
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24 #include <glxlog.h> |
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25 #include <glxtracer.h> |
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26 |
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27 // LOCAL CONSTANTS |
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28 namespace |
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29 { |
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30 // how many milliseconds go to microsecond |
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31 const TInt KMultiplyMilli2Micro = 1000; |
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32 } |
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33 |
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34 // DEPENDENCIES |
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35 |
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36 // ----------------------------------------------------------------------------- |
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37 // Constructor. |
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38 // ----------------------------------------------------------------------------- |
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39 inline CShwTimer::CShwTimer() |
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40 : iPaused( EFalse ) // not paused by default |
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41 { |
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42 } |
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43 |
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44 // ----------------------------------------------------------------------------- |
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45 // NewL. |
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46 // ----------------------------------------------------------------------------- |
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47 CShwTimer* CShwTimer::NewL( TInt aPriority ) |
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48 { |
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49 TRACER("CShwTimer::NewL"); |
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50 GLX_LOG_INFO( "CShwTimer::NewL" ); |
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51 CShwTimer* self = new (ELeave) CShwTimer; |
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52 CleanupStack::PushL( self ); |
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53 self->ConstructL( aPriority ); |
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54 CleanupStack::Pop( self ); |
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55 return self; |
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56 } |
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57 |
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58 // ----------------------------------------------------------------------------- |
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59 // ConstructL. |
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60 // ----------------------------------------------------------------------------- |
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61 void CShwTimer::ConstructL( TInt aPriority ) |
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62 { |
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63 TRACER("CShwTimer::ConstructL"); |
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64 GLX_LOG_INFO( "CShwTimer::ConstructL" ); |
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65 iTimer = CPeriodic::NewL( aPriority ); |
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66 } |
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67 |
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68 // ----------------------------------------------------------------------------- |
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69 // Destructor. |
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70 // ----------------------------------------------------------------------------- |
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71 CShwTimer::~CShwTimer() |
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72 { |
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73 TRACER("CShwTimer::~CShwTimer()"); |
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74 GLX_LOG_INFO( "CShwTimer::~CShwTimer" ); |
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75 Cancel(); |
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76 delete iTimer; |
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77 } |
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78 |
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79 // ----------------------------------------------------------------------------- |
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80 // Start. |
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81 // ----------------------------------------------------------------------------- |
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82 void CShwTimer::Start( TInt aDelay, TInt aInterval, TCallBack aCallback ) |
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83 { |
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84 TRACER("CShwTimer::Start"); |
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85 GLX_LOG_INFO( "CShwTimer::Start" ); |
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86 |
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87 // convert millisecond to microseconds |
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88 TTimeIntervalMicroSeconds32 delay = aDelay * KMultiplyMilli2Micro; |
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89 TTimeIntervalMicroSeconds32 interval = aInterval * KMultiplyMilli2Micro; |
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90 |
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91 // remember the callback |
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92 iCallback = aCallback; |
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93 // remember the interval |
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94 iInterval = interval; |
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95 // reset the time left in case start is called during pause |
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96 iTimeLeft = delay; |
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97 |
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98 // No harm in cancelling the timer before start |
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99 iTimer->Cancel(); |
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100 |
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101 // if not paused, start the timer |
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102 if( !iPaused ) |
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103 { |
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104 // Get the current time |
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105 iTimeTimerExpires.HomeTime(); |
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106 // Add the delay to determine the expiry time |
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107 iTimeTimerExpires += iTimeLeft; |
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108 // Start the timer |
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109 iTimer->Start( iTimeLeft, iInterval, iCallback ); |
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110 } |
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111 } |
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112 |
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113 // ----------------------------------------------------------------------------- |
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114 // Cancel. |
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115 // ----------------------------------------------------------------------------- |
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116 void CShwTimer::Cancel() |
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117 { |
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118 TRACER("CShwTimer::Cancel"); |
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119 GLX_LOG_INFO( "CShwTimer::Cancel" ); |
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120 if ( iTimer ) |
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121 { |
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122 iTimer->Cancel(); |
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123 } |
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124 } |
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125 |
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126 // ----------------------------------------------------------------------------- |
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127 // Pause |
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128 // ----------------------------------------------------------------------------- |
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129 void CShwTimer::Pause() |
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130 { |
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131 TRACER("CShwTimer::Pause"); |
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132 GLX_LOG_INFO( "CShwTimer::Pause" ); |
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133 // pause only if not yet paused |
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134 if( !iPaused ) |
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135 { |
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136 iPaused = ETrue; |
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137 // take time left |
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138 iTimeLeft = TimeLeft(); |
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139 //if the iTimeTimerExpires has already elapsed then we get -ve time left.In this case make it zero |
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140 if(iTimeLeft.Int() <= 0) |
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141 { |
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142 iTimeLeft = 0; |
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143 } |
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144 GLX_LOG_INFO1( "CShwTimer::Pause timeleft %d", iTimeLeft.Int() ); |
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145 // and cancel the timer |
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146 iTimer->Cancel(); |
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147 } |
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148 } |
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149 |
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150 // ----------------------------------------------------------------------------- |
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151 // Resume. |
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152 // ----------------------------------------------------------------------------- |
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153 void CShwTimer::Resume() |
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154 { |
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155 TRACER("CShwTimer::Resume"); |
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156 GLX_LOG_INFO( "CShwTimer::Resume" ); |
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157 // resume only if paused |
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158 if( iPaused ) |
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159 { |
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160 iPaused = EFalse; |
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161 // if we had time left |
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162 if( 0 <= iTimeLeft.Int() ) |
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163 { |
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164 GLX_LOG_INFO1( "CShwTimer::Resume timeleft %d", iTimeLeft.Int() ); |
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165 // start again, first for time left and after that with interval |
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166 // NOTE! cant use Start as it takes time as milliseconds in a TInt |
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167 // Get the current time |
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168 iTimeTimerExpires.HomeTime(); |
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169 // Add the delay to determine the expiry time |
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170 iTimeTimerExpires += iTimeLeft; |
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171 // Start the timer |
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172 iTimer->Start( iTimeLeft, iInterval, iCallback ); |
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173 } |
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174 } |
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175 } |
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176 |
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177 // ----------------------------------------------------------------------------- |
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178 // TimeLeft. |
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179 // ----------------------------------------------------------------------------- |
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180 TTimeIntervalMicroSeconds32 CShwTimer::TimeLeft() |
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181 { |
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182 TRACER("CShwTimer::TimeLeft"); |
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183 GLX_LOG_INFO( "CShwTimer::TimeLeft" ); |
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184 |
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185 TTime timeNow; |
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186 timeNow.HomeTime(); |
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187 |
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188 // Difference between time now and the time at which timer should expire |
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189 TTimeIntervalMicroSeconds remainingTime; |
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190 remainingTime = iTimeTimerExpires.MicroSecondsFrom( timeNow ); |
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191 |
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192 TTimeIntervalMicroSeconds32 timeLeft = I64INT( remainingTime.Int64() ); |
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193 |
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194 // In case that 64 bit value is larger than 32 bits, just have the |
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195 // maximum 32 bit value |
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196 if ( remainingTime > KMaxTInt32 ) |
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197 { |
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198 timeLeft = TTimeIntervalMicroSeconds32( KMaxTInt32 ); |
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199 } |
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200 |
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201 return timeLeft; |
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202 } |
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203 |
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204 // ----------------------------------------------------------------------------- |
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205 // IsActive. |
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206 // ----------------------------------------------------------------------------- |
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207 TBool CShwTimer::IsActive() |
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208 { |
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209 TRACER("CShwTimer::IsActive"); |
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210 return iTimer->IsActive(); |
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211 } |