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1 /* |
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2 * Copyright (c) 2006 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: |
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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 #ifndef _C_GLXDATASOURCETASKMDE_H_ |
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21 #define _C_GLXDATASOURCETASKMDE_H_ |
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22 |
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23 /** |
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24 * @author Simon Brooks, Alex Birkett |
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25 */ |
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26 |
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27 // INCLUDES |
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28 #include <e32cmn.h> |
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29 #include <glxdatasource.h> |
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30 #include <glxdatasourcetask.h> |
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31 #include <glxfilterproperties.h> |
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32 #include <mdccommon.h> |
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33 #include <mdequery.h> |
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34 #include <mglxtnthumbnailcreatorclient.h> |
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35 #include <mpxfilter.h> |
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36 |
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37 // FORWARD DECLARATIONS |
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38 class CGlxDataSourceMde; |
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39 class CGlxRequest; |
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40 class CGlxtnThumbnailCreator; |
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41 class CMdEObjectDef; |
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42 class CMdEObjectQuery; |
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43 class CMdESession; |
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44 |
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45 |
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46 /** |
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47 * Query types supported by subclasses of CGlxDataSourceTaskMde |
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48 */ |
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49 enum TGlxQueryType |
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50 { |
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51 EContainerFirstItemQuery, // CGlxDataSourceTaskMdeThumbnail+ |
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52 EIdListQuery, // GlxDataSourceTaskMdeIdList |
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53 EAttributeQuery, // CGlxDataSourceTaskMdeAttribute |
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54 ELocationAttributeQuery, // CGlxDataSourceTaskMdeAttribute |
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55 EImageVideoQuery, // CGlxDataSourceTaskMdeAttribute (but should be general) |
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56 ECommandRemoveFromContainer, // CGlxDataSourceTaskMdeCommand |
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57 ECommandAddToContainer, // CGlxDataSourceTaskMdeCommand |
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58 ECommandRemoveLocation, // CGlxDataSourceTaskMdeCommand |
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59 ECommandAddContainer, // CGlxDataSourceTaskMdeCommand adds a container |
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60 ECommandDeleteContainers, // CGlxDataSourceTaskMdeCommand deletes containers objects |
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61 ECommandDeleteItems, // CGlxDataSourceTaskMdeCommand deletes containers objects |
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62 ECommandRenameContainer, |
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63 ECommandRename |
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64 }; |
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65 |
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66 /** |
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67 * CGlxDataSourceTaskMde class |
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68 * Base class for mde tasks: provides task generic functionality. |
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69 */ |
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70 NONSHARABLE_CLASS(CGlxDataSourceTaskMde) : public CGlxDataSourceTask, public MMdEQueryObserver |
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71 { |
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72 public: |
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73 /** |
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74 * Constructor. |
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75 * @param aRequest request to be executed. |
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76 * @param aObserver observer to be informed when task has completed. |
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77 * @param aDataSource data source to be used by this object. |
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78 */ |
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79 CGlxDataSourceTaskMde(CGlxRequest* aRequest, MGlxDataSourceRequestObserver& aObserver, |
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80 CGlxDataSource* aDataSource); |
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81 |
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82 /** |
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83 * Destructor. |
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84 */ |
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85 ~CGlxDataSourceTaskMde(); |
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86 |
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87 /** |
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88 * Second stage constructor |
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89 */ |
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90 virtual void ConstructL(); |
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91 |
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92 protected: // to be implemented by deriving classes |
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93 /** |
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94 * See @ref CGlxDataSourceTask::ExecuteRequestL |
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95 */ |
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96 virtual void ExecuteRequestL() = 0; |
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97 |
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98 /** |
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99 * Must be implemented by deriving classes. To handle query completion |
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100 * @param aQuery Query that has been completed. |
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101 */ |
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102 virtual void DoHandleQueryCompletedL(CMdEQuery& aQuery) = 0; |
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103 |
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104 /** |
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105 * Optionally implemented by deriving classes. Used if the deriving class has |
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106 * to run more than one query. Should start the next query or call HandleRequestComplete() |
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107 * if no futher queries are required to be run. If the deriving class only has a single query, |
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108 * HandleRequestComplete() can be called from DoHandleQueryCompletedL() |
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109 */ |
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110 virtual void DoNextQueryL() {} |
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111 |
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112 public: // From CGlxDataSourceTask |
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113 /** |
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114 * See @ref CGlxDataSourceTask::CancelRequest |
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115 */ |
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116 void CancelRequest(); |
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117 |
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118 private: // from MMdEQueryObserver |
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119 /** |
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120 * See @ref MMdEQueryObserver::HandleQueryNewResults |
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121 */ |
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122 void HandleQueryNewResults( CMdEQuery& aQuery, |
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123 TInt aFirstNewItemIndex, |
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124 TInt aNewItemCount ); |
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125 /** |
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126 * See @ref MMdEQueryObserver::HandleQueryNewResults |
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127 */ |
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128 void HandleQueryNewResults( CMdEQuery& aQuery, |
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129 TInt aNewObjectItemCount, |
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130 TInt aNewRelationItemCount, |
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131 TInt aNewEventItemCount); |
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132 /** |
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133 * See @ref MMdEQueryObserver::HandleQueryCompleted |
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134 */ |
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135 void HandleQueryCompleted( CMdEQuery& aQuery, TInt aError); |
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136 |
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137 protected: |
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138 |
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139 /** |
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140 * Returns a pointer to the CGlxDataSourceMde object passed in on instantiation. |
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141 * @return a pointer to the CGlxDataSourceMde object passed in on instantiation. |
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142 */ |
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143 CGlxDataSourceMde* DataSource(); |
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144 |
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145 void AddMonthFilterL(const TGlxMediaId& aContainerId, TGlxFilterProperties& aFilterProperties); |
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146 |
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147 void AddMonthFilterL(CMdEObject* aMonth, TGlxFilterProperties& aFilterProperties); |
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148 |
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149 /** |
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150 * Set query contditions by container id and filter properties. |
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151 * @param aLogicCondition logic condition to add conditions to |
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152 * @param aContainerId Id of the container |
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153 * @param aContainerIsLeft. This should be set to to ETrue if the container is on the left side of the releation, or |
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154 * EFalse if the container is on the right side of the relation |
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155 * |
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156 */ |
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157 void SetQueryConditionsL(CMdEQuery& aQuery, const TGlxFilterProperties& aFilterProperties, const TGlxMediaId aContainerId, CMdEObjectDef& aObjectDef); |
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158 |
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159 void SetQueryFilterConditionsL(CMdELogicCondition& aLogicCondition, CMdEObjectDef& aObjectDef, const TGlxFilterProperties& aFilterProperties); |
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160 |
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161 void SetSortOrderL(CMdEQuery& aQuery, CMdEObjectDef& aObjectDef, const TGlxFilterProperties& aFilterProperties); |
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162 |
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163 /** |
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164 * Returns the maximum number of items that a query should find. |
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165 * @return Maximum number of results |
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166 */ |
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167 TInt MaxQueryResultsCount(const TGlxFilterProperties& aFilterProperties) const; |
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168 |
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169 /** |
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170 * Removes and destroys the oldest query in iQueries. |
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171 */ |
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172 void RemoveQuery(); |
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173 |
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174 void DoQueryL(CMdEObjectDef& aObjectDef, TBool aIsContent, TGlxQueryType aQueryType, TQueryResultMode aResultMode, const TGlxMediaId& aContainerId); |
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175 |
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176 /** |
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177 * Adds queries for images and or videos to the query queue. The queries will return objects |
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178 * of type image or video that have ids specified by aObjectIds. |
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179 * @param aObjectIds A list of the ids of the required objects. |
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180 * @param aFilterProperties TGlxFilterProperties.iItemType is used to determine if only |
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181 * image or video queries are required if iItemType is not set to EGlxFilterImage or |
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182 * EGlxFitlerVideo a query for images will be queued first followed by a query for videos. |
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183 */ |
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184 void QueueImageVideoObjectQueriesL(const RArray<TItemId>& aObjectIds, const TGlxFilterProperties& aFilterProperties); |
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185 |
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186 /** |
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187 * Adds a query for tag objects that have ids specified by aObjectIds |
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188 * to the query queue. |
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189 * @param aObjectIds A list of the ids of the required objects. |
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190 */ |
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191 void QueueTagObjectQueryL(const RArray<TItemId>& aObjectIds); |
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192 |
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193 /** |
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194 * Adds a query for album objects that have ids specified by aObjectIds |
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195 * to the query queue. |
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196 * @param aObjectIds A list of the ids of the required objects. |
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197 */ |
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198 void QueueAlbumObjectQueryL(const RArray<TItemId>& aObjectIds); |
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199 |
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200 /** |
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201 * Adds a query for "month" objects that have ids specified by aObjectIds |
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202 * to the query queue. |
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203 * @param aObjectIds A list of the ids of the required objects. |
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204 */ |
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205 void QueueMonthObjectQueryL(const RArray<TItemId>& aObjectIds); |
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206 |
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207 /** |
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208 * Adds a query for objects of type specified by aObjectDef |
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209 * that have ids specified by aObjectIds to the query queue. |
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210 * @param aObjectDef type of objects required. |
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211 * @param aObjectIds A list of the ids of the required objects. |
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212 * @param aQueryType The query type. |
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213 */ |
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214 void QueueObjectQueryL(CMdEObjectDef& aObjectDef, |
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215 const RArray<TItemId>& aObjectIds, const TGlxQueryType& aQueryType); |
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216 |
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217 /** |
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218 * Appends a query to the query queue. (the ownership of the query is transferred) |
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219 * @param aQuery query to append to the query queue ownership is transferred to |
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220 * the query queue. It is expected that aQuery is not on the cleanupstack before the |
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221 * call to AppendQueryL is made |
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222 * @param aQueryType the query type. |
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223 */ |
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224 void AppendQueryL(CMdEQuery* aQuery, const TGlxQueryType& aQueryType); |
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225 |
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226 /** |
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227 * Executes the query at ordinal 0 in the |
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228 * query list implementation can be overidden by |
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229 * deriving classes. |
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230 */ |
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231 virtual void ExecuteQueryL(); |
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232 |
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233 private: |
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234 /* |
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235 * Helper function TRAPed and called by HandleQueryCompleted() |
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236 * @param aQuery the query that has been completed |
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237 */ |
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238 void HandleQueryCompletedL(CMdEQuery& aQuery); |
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239 |
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240 /** |
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241 * Removes the observer from any existing queries, cancels and destroys them |
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242 */ |
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243 void DestroyQueries(); |
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244 |
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245 private: |
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246 /** |
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247 * Default namespace def (not owned) |
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248 */ |
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249 CMdENamespaceDef* iDefaultNameSpaceDef; |
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250 |
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251 protected: |
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252 /** |
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253 * Outstanding queries array (owned) |
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254 */ |
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255 RPointerArray <CMdEQuery> iQueries; |
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256 |
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257 /** |
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258 * Query types array (owned) |
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259 */ |
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260 RArray <TGlxQueryType> iQueryTypes; |
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261 |
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262 /** |
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263 * Filter properties |
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264 */ |
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265 TGlxFilterProperties iFilterProperties; |
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266 }; |
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267 |
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268 #endif //_C_GLXDATASOURCETASKMDE_H_ |