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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file GUI/View/Device/DistributionPlot.cpp
//! @brief Implements class DistributionPlot.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "GUI/View/Device/DistributionPlot.h"
#include "Base/Util/Assert.h"
#include "GUI/Model/Beam/DistributionItems.h"
#include "GUI/View/Info/CautionSign.h"
#include "Param/Distrib/Distributions.h"
#include "Param/Distrib/ParameterSample.h"
DistributionPlot::DistributionPlot(QWidget* parent)
: QWidget(parent)
, m_qcp(new QCustomPlot)
, m_dist_item(nullptr)
, m_label(new QLabel)
, m_reset_action(new QAction(this))
, m_caution_sign(new CautionSign(this))
{
setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
m_reset_action->setText("Reset View");
connect(m_reset_action, &QAction::triggered, this, &DistributionPlot::resetView);
m_label->setAlignment(Qt::AlignVCenter | Qt::AlignLeft);
auto* mainLayout = new QVBoxLayout;
mainLayout->addWidget(m_qcp, 1);
mainLayout->addWidget(m_label);
m_qcp->setAttribute(Qt::WA_NoMousePropagation, false);
setLayout(mainLayout);
connect(m_qcp, &QCustomPlot::mousePress, this, &DistributionPlot::onMousePress);
connect(m_qcp, &QCustomPlot::mouseMove, this, &DistributionPlot::onMouseMove);
}
void DistributionPlot::setDistItem(DistributionItem* distItem)
{
ASSERT(distItem);
if (m_dist_item == distItem)
return;
m_dist_item = distItem;
plotItem();
}
void DistributionPlot::plotItem()
{
init_plot();
if (!m_dist_item->is<DistributionDeltaItem>()) {
try {
plot_distributions();
} catch (const std::exception& ex) {
init_plot();
QString message = QString("Wrong parameters\n\n") + (QString::fromStdString(ex.what()));
m_caution_sign->setCautionMessage(message);
}
}
m_qcp->replot();
}
//! Generates label with current mouse position.
void DistributionPlot::onMouseMove(QMouseEvent* event)
{
QPoint point = event->pos();
double xPos = m_qcp->xAxis->pixelToCoord(point.x());
double yPos = m_qcp->yAxis->pixelToCoord(point.y());
if (m_qcp->xAxis->range().contains(xPos) && m_qcp->yAxis->range().contains(yPos)) {
QString text = QString("[x:%1, y:%2]").arg(xPos).arg(yPos);
m_label->setText(text);
}
}
void DistributionPlot::onMousePress(QMouseEvent* event)
{
if (event->button() == Qt::RightButton) {
QPoint point = event->globalPos();
QMenu menu;
menu.addAction(m_reset_action);
menu.exec(point);
}
}
//! Reset zoom range to initial state.
void DistributionPlot::resetView()
{
m_qcp->xAxis->setRange(m_x_range);
m_qcp->yAxis->setRange({0, 1.1});
m_qcp->replot();
}
//! Clears all plottables, resets axes to initial state.
void DistributionPlot::init_plot()
{
m_caution_sign->clear();
m_qcp->clearGraphs();
m_qcp->clearItems();
m_qcp->clearPlottables();
m_qcp->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom | QCP::iSelectAxes | QCP::iSelectLegend
| QCP::iSelectPlottables);
m_qcp->yAxis->setLabel("probability");
m_qcp->yAxis->setTickLabels(false);
m_qcp->xAxis2->setVisible(true);
m_qcp->yAxis2->setVisible(true);
m_qcp->xAxis2->setTickLabels(false);
m_qcp->yAxis2->setTickLabels(false);
m_qcp->xAxis2->setTicks(false);
m_qcp->yAxis2->setTicks(false);
m_qcp->yAxis->setRange({0, 1.1});
setPlotRange({-1, 1});
}
void DistributionPlot::plot_distributions()
{
ASSERT(!m_dist_item->is<DistributionDeltaItem>());
auto distrib = m_dist_item->createDistribution();
//... Plot function graph
std::vector<std::pair<double, double>> graph = distrib->plotGraph();
double max_y = 0;
for (auto& i : graph)
max_y = std::max(max_y, i.second);
QVector<double> xFunc(graph.size());
QVector<double> yFunc(graph.size());
for (size_t i = 0; i < graph.size(); ++i) {
xFunc[i] = graph[i].first;
yFunc[i] = graph[i].second / max_y;
}
setPlotRange({xFunc.first(), xFunc.last()});
m_qcp->addGraph();
m_qcp->graph(0)->setData(xFunc, yFunc);
//... Plot bars to represent weighted sampling points
std::vector<ParameterSample> samples = distrib->distributionSamples();
size_t N = samples.size();
max_y = 0;
for (size_t i = 0; i < N; ++i)
max_y = std::max(max_y, samples[i].weight);
QVector<double> xBar(N);
QVector<double> yBar(N);
for (size_t i = 0; i < N; ++i) {
xBar[i] = samples[i].value;
yBar[i] = samples[i].weight / max_y;
}
// use rational function to set bar width:
// - at low N, a constant fraction of the plot range
// - at large N, decreasing with N^-1
double barWidth = (xFunc.last() - xFunc.first()) / (30 + 3 * N * N / (10 + N));
auto* bars = new QCPBars(m_qcp->xAxis, m_qcp->yAxis);
bars->setWidth(barWidth);
bars->setData(xBar, yBar);
}
void DistributionPlot::setPlotRange(const std::pair<double, double>& xRange)
{
m_x_range = QCPRange(xRange.first, xRange.second);
m_qcp->xAxis->setRange(m_x_range);
}
void DistributionPlot::plotVerticalLine(double xMin, double yMin, double xMax, double yMax,
const QColor& color)
{
auto* line = new QCPItemLine(m_qcp);
QPen pen(color, 1, Qt::DashLine);
line->setPen(pen);
line->setSelectable(true);
line->start->setCoords(xMin, yMin);
line->end->setCoords(xMax, yMax);
}
void DistributionPlot::setXAxisName(const QString& xAxisName)
{
m_qcp->xAxis->setLabel(xAxisName);
}
void DistributionPlot::setShowMouseCoords(bool b)
{
m_label->setVisible(b);
}
|
