1 /* |
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2 * Copyright (c) 2002 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: Define CCalcHistory class. This class is handled historical |
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15 * line of the calculator. |
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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 // INCLUDE FILES |
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22 #include "CalcEditline.h" |
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23 #include "CalcHistory.h" |
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24 |
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25 // LOCAL CONSTANTS AND MACROS |
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26 |
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27 |
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28 // ================= MEMBER FUNCTIONS ======================= |
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29 |
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30 // C++ default constructor can NOT contain any code, that |
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31 // might leave. |
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32 // |
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33 CCalcHistory::CCalcHistory(): |
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34 iNewestIndex(KCalcMaxHistoryLines - 1) |
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35 { |
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36 iHistory[iNewestIndex].AllClear(); |
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37 } |
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38 |
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39 // Destructor |
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40 CCalcHistory::~CCalcHistory() |
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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 |
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46 // Assignment operator |
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47 // This inplementation depends on how to have history data. |
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48 // Refer to description of member data, CCalcHistory.h |
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49 // |
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50 const TCalcEditLine& CCalcHistory::operator[] |
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51 (TInt aIndex) // Get (aIndex + 1)th latest history line |
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52 { |
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53 TInt lineIndex(iNewestIndex - aIndex); |
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54 |
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55 if ( lineIndex < 0 ) |
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56 { |
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57 lineIndex += KCalcMaxHistoryLines; |
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58 } |
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59 |
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60 return iHistory[lineIndex]; |
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61 } |
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62 |
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63 // --------------------------------------------------------- |
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64 // CCalcHistory::Count |
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65 // Return count of histoical lines. |
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66 // (other items were commented in a header). |
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67 // --------------------------------------------------------- |
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68 // |
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69 TInt CCalcHistory::Count() const |
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70 { |
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71 return iCount; |
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72 } |
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73 |
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74 // --------------------------------------------------------- |
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75 // CCalcHistory::Add |
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76 // This inplementation depends on how to have history data. |
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77 // Refer to description of member data, CCalcHistory.h |
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78 // (other items were commented in a header). |
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79 // --------------------------------------------------------- |
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80 // |
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81 void CCalcHistory::Add |
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82 (const TCalcEditLine aLine) |
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83 { |
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84 if ( iNewestIndex == (KCalcMaxHistoryLines - 1) ) |
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85 { |
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86 iNewestIndex = 0; |
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87 } |
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88 else |
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89 { |
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90 iNewestIndex++; |
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91 } |
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92 |
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93 if ( iCount < KCalcMaxHistoryLines ) |
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94 { |
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95 iCount++; |
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96 } |
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97 |
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98 iHistory[iNewestIndex] = aLine; |
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99 } |
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100 |
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101 // --------------------------------------------------------- |
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102 // CCalcHistory::ClearHistory |
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103 // Clear calculation history. |
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104 // (other items were commented in a header). |
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105 // --------------------------------------------------------- |
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106 // |
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107 void CCalcHistory::ClearHistory() |
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108 { |
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109 iCount = 0; |
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110 iNewestIndex = KCalcMaxHistoryLines - 1; |
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111 for (TInt cnt(0); cnt < KCalcMaxHistoryLines; cnt++) |
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112 { |
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113 iHistory[cnt].AllClear(); |
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114 } |
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115 } |
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116 |
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117 |
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118 // --------------------------------------------------------- |
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119 // CCalcHistory::NotifyChangeDecimal |
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120 // Call when decimal separator is changed. |
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121 // (other items were commented in a header). |
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122 // --------------------------------------------------------- |
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123 // |
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124 void CCalcHistory::NotifyChangeDecimal(TChar aOld, TChar aNew) |
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125 { |
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126 for (TInt cnt(0); cnt < iCount; cnt++) |
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127 { |
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128 iHistory[cnt].ChangeDecimal(aOld, aNew); |
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129 } |
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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 // End of File |
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