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28 | ****************************************************************************/ |
29 | |
30 | #include "variantbardataproxy.h" |
31 | |
32 | using namespace QtDataVisualization; |
33 | |
34 | VariantBarDataProxy::VariantBarDataProxy() : |
35 | QBarDataProxy() |
36 | { |
37 | } |
38 | |
39 | VariantBarDataProxy::VariantBarDataProxy(VariantDataSet *newSet, |
40 | VariantBarDataMapping *mapping) : |
41 | QBarDataProxy() |
42 | { |
43 | setDataSet(newSet); |
44 | setMapping(mapping); |
45 | } |
46 | |
47 | VariantBarDataProxy::~VariantBarDataProxy() |
48 | { |
49 | delete m_dataSet; |
50 | } |
51 | |
52 | void VariantBarDataProxy::setDataSet(VariantDataSet *newSet) |
53 | { |
54 | if (!m_dataSet.isNull()) |
55 | QObject::disconnect(sender: m_dataSet.data(), signal: 0, receiver: this, member: 0); |
56 | |
57 | m_dataSet = newSet; |
58 | |
59 | if (!m_dataSet.isNull()) { |
60 | QObject::connect(sender: m_dataSet.data(), signal: &VariantDataSet::itemsAdded, receiver: this, |
61 | slot: &VariantBarDataProxy::handleItemsAdded); |
62 | QObject::connect(sender: m_dataSet.data(), signal: &VariantDataSet::dataCleared, receiver: this, |
63 | slot: &VariantBarDataProxy::handleDataCleared); |
64 | } |
65 | resolveDataSet(); |
66 | } |
67 | |
68 | VariantDataSet *VariantBarDataProxy::dataSet() |
69 | { |
70 | return m_dataSet.data(); |
71 | } |
72 | |
73 | void VariantBarDataProxy::setMapping(VariantBarDataMapping *mapping) |
74 | { |
75 | if (!m_mapping.isNull()) |
76 | QObject::disconnect(sender: m_mapping.data(), signal: &VariantBarDataMapping::mappingChanged, receiver: this, |
77 | slot: &VariantBarDataProxy::handleMappingChanged); |
78 | |
79 | m_mapping = mapping; |
80 | |
81 | if (!m_mapping.isNull()) |
82 | QObject::connect(sender: m_mapping.data(), signal: &VariantBarDataMapping::mappingChanged, receiver: this, |
83 | slot: &VariantBarDataProxy::handleMappingChanged); |
84 | |
85 | resolveDataSet(); |
86 | } |
87 | |
88 | VariantBarDataMapping *VariantBarDataProxy::mapping() |
89 | { |
90 | return m_mapping.data(); |
91 | } |
92 | |
93 | void VariantBarDataProxy::handleItemsAdded(int index, int count) |
94 | { |
95 | Q_UNUSED(index) |
96 | Q_UNUSED(count) |
97 | |
98 | // Resolve new items |
99 | resolveDataSet(); |
100 | } |
101 | |
102 | void VariantBarDataProxy::handleDataCleared() |
103 | { |
104 | // Data cleared, reset array |
105 | resetArray(newArray: 0); |
106 | } |
107 | |
108 | void VariantBarDataProxy::handleMappingChanged() |
109 | { |
110 | resolveDataSet(); |
111 | } |
112 | |
113 | // Resolve entire dataset into QBarDataArray. |
114 | //! [0] |
115 | void VariantBarDataProxy::resolveDataSet() |
116 | { |
117 | // If we have no data or mapping, or the categories are not defined, simply clear the array |
118 | if (m_dataSet.isNull() || m_mapping.isNull() || !m_mapping->rowCategories().size() |
119 | || !m_mapping->columnCategories().size()) { |
120 | resetArray(newArray: 0); |
121 | return; |
122 | } |
123 | const VariantDataItemList &itemList = m_dataSet->itemList(); |
124 | |
125 | int rowIndex = m_mapping->rowIndex(); |
126 | int columnIndex = m_mapping->columnIndex(); |
127 | int valueIndex = m_mapping->valueIndex(); |
128 | const QStringList &rowList = m_mapping->rowCategories(); |
129 | const QStringList &columnList = m_mapping->columnCategories(); |
130 | |
131 | // Sort values into rows and columns |
132 | typedef QHash<QString, float> ColumnValueMap; |
133 | QHash <QString, ColumnValueMap> itemValueMap; |
134 | foreach (const VariantDataItem *item, itemList) { |
135 | itemValueMap[item->at(i: rowIndex).toString()][item->at(i: columnIndex).toString()] |
136 | = item->at(i: valueIndex).toReal(); |
137 | } |
138 | |
139 | // Create a new data array in format the parent class understands |
140 | QBarDataArray *newProxyArray = new QBarDataArray; |
141 | foreach (QString rowKey, rowList) { |
142 | QBarDataRow *newProxyRow = new QBarDataRow(columnList.size()); |
143 | for (int i = 0; i < columnList.size(); i++) |
144 | (*newProxyRow)[i].setValue(itemValueMap[rowKey][columnList.at(i)]); |
145 | newProxyArray->append(t: newProxyRow); |
146 | } |
147 | |
148 | // Finally, reset the data array in the parent class |
149 | resetArray(newArray: newProxyArray); |
150 | } |
151 | //! [0] |
152 | |