1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "variantbardataproxy.h"
VariantBarDataProxy::VariantBarDataProxy() :
QBarDataProxy()
{
}
VariantBarDataProxy::VariantBarDataProxy(VariantDataSet *newSet,
VariantBarDataMapping *mapping) :
QBarDataProxy()
{
setDataSet(newSet);
setMapping(mapping);
}
VariantBarDataProxy::~VariantBarDataProxy()
{
delete m_dataSet;
}
void VariantBarDataProxy::setDataSet(VariantDataSet *newSet)
{
if (!m_dataSet.isNull())
QObject::disconnect(m_dataSet.data(), 0, this, 0);
m_dataSet = newSet;
if (!m_dataSet.isNull()) {
QObject::connect(m_dataSet.data(), &VariantDataSet::itemsAdded, this,
&VariantBarDataProxy::handleItemsAdded);
QObject::connect(m_dataSet.data(), &VariantDataSet::dataCleared, this,
&VariantBarDataProxy::handleDataCleared);
}
resolveDataSet();
}
VariantDataSet *VariantBarDataProxy::dataSet()
{
return m_dataSet.data();
}
void VariantBarDataProxy::setMapping(VariantBarDataMapping *mapping)
{
if (!m_mapping.isNull())
QObject::disconnect(m_mapping.data(), &VariantBarDataMapping::mappingChanged, this,
&VariantBarDataProxy::handleMappingChanged);
m_mapping = mapping;
if (!m_mapping.isNull())
QObject::connect(m_mapping.data(), &VariantBarDataMapping::mappingChanged, this,
&VariantBarDataProxy::handleMappingChanged);
resolveDataSet();
}
VariantBarDataMapping *VariantBarDataProxy::mapping()
{
return m_mapping.data();
}
void VariantBarDataProxy::handleItemsAdded(int index, int count)
{
Q_UNUSED(index);
Q_UNUSED(count);
// Resolve new items
resolveDataSet();
}
void VariantBarDataProxy::handleDataCleared()
{
// Data cleared, reset array
resetArray(0);
}
void VariantBarDataProxy::handleMappingChanged()
{
resolveDataSet();
}
// Resolve entire dataset into QBarDataArray.
//! [0]
void VariantBarDataProxy::resolveDataSet()
{
// If we have no data or mapping, or the categories are not defined, simply clear the array
if (m_dataSet.isNull() || m_mapping.isNull() || !m_mapping->rowCategories().size()
|| !m_mapping->columnCategories().size()) {
resetArray(0);
return;
}
const VariantDataItemList &itemList = m_dataSet->itemList();
int rowIndex = m_mapping->rowIndex();
int columnIndex = m_mapping->columnIndex();
int valueIndex = m_mapping->valueIndex();
const QStringList &rowList = m_mapping->rowCategories();
const QStringList &columnList = m_mapping->columnCategories();
// Sort values into rows and columns
typedef QHash<QString, float> ColumnValueMap;
QHash <QString, ColumnValueMap> itemValueMap;
foreach (const VariantDataItem *item, itemList) {
itemValueMap[item->at(rowIndex).toString()][item->at(columnIndex).toString()]
= item->at(valueIndex).toReal();
}
// Create a new data array in format the parent class understands
QBarDataArray *newProxyArray = new QBarDataArray;
foreach (QString rowKey, rowList) {
QBarDataRow *newProxyRow = new QBarDataRow(columnList.size());
for (int i = 0; i < columnList.size(); i++)
(*newProxyRow)[i].setValue(itemValueMap[rowKey][columnList.at(i)]);
newProxyArray->append(newProxyRow);
}
// Finally, reset the data array in the parent class
resetArray(newProxyArray);
}
//! [0]
|