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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: LandmarksUi Content File - |
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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 |
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22 |
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23 |
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24 |
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25 // INCLUDE FILES |
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26 #include "CLmkSelectorCache.h" |
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27 #include "CLmkUiItemBase.h" |
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28 #include "CLmkListProviderBase.h" |
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29 #include <lmkerrors.h> |
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30 |
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31 |
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32 // CONSTANTS |
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33 /// Unnamed namespace for local definitions |
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34 namespace { |
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35 |
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36 const TInt KMaxCacheArraySize( 10 ); |
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37 #if defined(_DEBUG) |
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38 _LIT( KPanicMsg, "CLmkSelectorCache" ); |
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39 |
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40 void Panic( TPanicCode aReason ) |
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41 { |
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42 User::Panic( KPanicMsg, aReason ); |
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43 } |
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44 #endif |
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45 } // namespace |
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46 |
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47 // ============================ MEMBER FUNCTIONS =============================== |
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48 |
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49 // ----------------------------------------------------------------------------- |
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50 // CLmkSelectorCache::CLmkSelectorCache |
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51 // C++ default constructor can NOT contain any code, that |
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52 // might leave. |
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53 // ----------------------------------------------------------------------------- |
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54 // |
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55 CLmkSelectorCache::CLmkSelectorCache( CLmkListProviderBase& aListProvider ) |
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56 : iListProvider( aListProvider ) |
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57 { |
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58 } |
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59 |
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60 // ----------------------------------------------------------------------------- |
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61 // CLmkSelectorCache::ConstructL |
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62 // Symbian 2nd phase constructor can leave. |
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63 // ----------------------------------------------------------------------------- |
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64 // |
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65 void CLmkSelectorCache::ConstructL() |
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66 { |
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67 iListProvider.AddObserverL( *this ); |
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68 } |
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69 |
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70 // ----------------------------------------------------------------------------- |
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71 // CLmkSelectorCache::NewL |
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72 // Two-phased constructor. |
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73 // ----------------------------------------------------------------------------- |
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74 // |
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75 CLmkSelectorCache* CLmkSelectorCache::NewL( |
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76 CLmkListProviderBase& aListProvider ) |
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77 { |
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78 CLmkSelectorCache* self = new( ELeave ) CLmkSelectorCache( aListProvider ); |
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79 |
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80 CleanupStack::PushL( self ); |
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81 self->ConstructL(); |
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82 CleanupStack::Pop(); |
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83 |
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84 return self; |
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85 } |
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86 |
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87 // ---------------------------------------------------- |
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88 // CLmkSelectorCache::~CLmkSelectorCache |
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89 // ---------------------------------------------------- |
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90 // |
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91 CLmkSelectorCache::~CLmkSelectorCache() |
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92 { |
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93 iListProvider.RemoveObserver(*this); |
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94 iItemList.ResetAndDestroy(); |
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95 iItemList.Close(); |
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96 } |
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97 |
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98 // ----------------------------------------------------------------------------- |
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99 // CLmkSelectorCache::ItemAtL |
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100 // Cache takes the ownership of item, therefore it receives a pointer, |
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101 // but passes a reference to the lb model |
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102 // ----------------------------------------------------------------------------- |
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103 // |
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104 CLmkUiItemBase& CLmkSelectorCache::ItemAtL( TInt aIndex ) |
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105 { |
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106 __ASSERT_DEBUG( aIndex >= 0, Panic( KLmkPanicInvalidIndex ) ); |
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107 TInt count = iItemList.Count(); |
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108 for ( TInt i( 0 ); i < count; ++i ) |
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109 { |
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110 if ( aIndex == iItemList[i]->iIndex ) |
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111 { |
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112 CLinkedItem* tmp = iItemList[i]; |
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113 CleanupStack::PushL( tmp ); |
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114 iItemList.Remove( i ); |
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115 User::LeaveIfError( iItemList.Insert( tmp, 0 ) ); |
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116 CleanupStack::Pop( tmp ); |
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117 return *(iItemList[0]->iPtr); |
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118 } |
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119 } |
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120 __ASSERT_DEBUG( iListProvider.ItemCount() > aIndex , |
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121 Panic(KLmkPanicInvalidIndex) ); |
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122 CLinkedItem* tmp = new(ELeave) CLinkedItem(); |
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123 CleanupStack::PushL( tmp ); |
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124 tmp->iIndex = aIndex; |
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125 tmp->iPtr = iListProvider.ItemAtL( aIndex ); |
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126 User::LeaveIfError( iItemList.Insert( tmp, 0 ) ); |
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127 CleanupStack::Pop(); // tmp |
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128 |
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129 if ( iItemList.Count() > KMaxCacheArraySize ) |
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130 { |
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131 delete iItemList[KMaxCacheArraySize]; |
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132 iItemList.Remove( KMaxCacheArraySize ); |
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133 } |
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134 return *( iItemList[0]->iPtr ); |
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135 } |
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136 |
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137 // ----------------------------------------------------------------------------- |
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138 // CLmkSelectorCache::ItemCount |
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139 // ?implementation_description |
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140 // (other items were commented in a header). |
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141 // ----------------------------------------------------------------------------- |
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142 // |
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143 TInt CLmkSelectorCache::ItemCount() const |
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144 { |
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145 // dummy implementation: |
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146 return iListProvider.ItemCount(); |
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147 } |
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148 |
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149 // ----------------------------------------------------------------------------- |
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150 // CLmkSelectorCache::HandleListProviderEventL |
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151 // ?implementation_description |
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152 // (other items were commented in a header). |
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153 // ----------------------------------------------------------------------------- |
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154 // |
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155 void CLmkSelectorCache::HandleListProviderEvent( |
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156 TLmkListProviderEventType /*aEvent*/ ) |
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157 { |
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158 iItemList.ResetAndDestroy(); |
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159 } |
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160 |
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161 // ---------------------------------------------------- |
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162 // CLmkSelectorCache::HandleListProviderError |
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163 // ---------------------------------------------------- |
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164 // |
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165 void CLmkSelectorCache::HandleListProviderError( TInt /*aError*/ ) |
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166 { |
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167 iItemList.ResetAndDestroy(); |
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168 } |
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169 |
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170 // ---------------------------------------------------- |
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171 // CLmkSelectorCache::CLinkedItem |
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172 // ---------------------------------------------------- |
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173 // |
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174 CLmkSelectorCache::CLinkedItem::CLinkedItem() |
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175 { |
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176 } |
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177 |
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178 // ---------------------------------------------------- |
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179 // CLmkSelectorCache::~CLinkedItem |
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180 // ---------------------------------------------------- |
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181 // |
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182 CLmkSelectorCache::CLinkedItem::~CLinkedItem() |
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183 { |
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184 delete this->iPtr; |
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185 } |
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186 |
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187 |
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188 // End of File |