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VisualizationGraphRenderingDelegate.cpp
332 lines | 12.0 KiB | text/x-c | CppLexer
/ gui / src / Visualization / VisualizationGraphRenderingDelegate.cpp
Alexandre Leroux
Creates a delegate offering methods for rendering a graph
r480 #include "Visualization/VisualizationGraphRenderingDelegate.h"
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Refactoring handling of axes properties (2)...
r916 #include "Visualization/AxisRenderingUtils.h"
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Handles double click on color scale...
r1002 #include "Visualization/ColorScaleEditor.h"
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Handles rendering of plottables (3)...
r919 #include "Visualization/PlottablesRenderingUtils.h"
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Uses SciQlop color scale in graphs
r1009 #include "Visualization/SqpColorScale.h"
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Passes directly GraphWidget in delegate...
r725 #include "Visualization/VisualizationGraphWidget.h"
Alexandre Leroux
Creates a delegate offering methods for rendering a graph
r480 #include "Visualization/qcustomplot.h"
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Uses the same time spec (UTC) as axis for tooltips on graph
r490 #include <Common/DateUtils.h>
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Adds button on plot overlay to show/hide x-axis properties
r729 #include <Data/IDataSeries.h>
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Adds title and close items in plot overlay
r726 #include <SqpApplication.h>
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Inits tracers and timer...
r482 namespace {
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Adds button on plot overlay to show/hide x-axis properties
r729 /// Name of the axes layer in QCustomPlot
const auto AXES_LAYER = QStringLiteral("axes");
/// Icon used to show x-axis properties
const auto HIDE_AXIS_ICON_PATH = QStringLiteral(":/icones/down.png");
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Adds title and close items in plot overlay
r726 /// Name of the overlay layer in QCustomPlot
const auto OVERLAY_LAYER = QStringLiteral("overlay");
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Adds button on plot overlay to show/hide x-axis properties
r729 /// Pixmap used to show x-axis properties
const auto SHOW_AXIS_ICON_PATH = QStringLiteral(":/icones/up.png");
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Tooltip for spectrograms (1)...
r1024 /// Tooltip format for graphs
const auto GRAPH_TOOLTIP_FORMAT = QStringLiteral("key: %1\nvalue: %2");
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Tooltip for spectrograms (4)...
r1027 /// Tooltip format for colormaps
const auto COLORMAP_TOOLTIP_FORMAT = QStringLiteral("x: %1\ny: %2\nvalue: %3");
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Show tracers method (1)...
r483
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Shifts tooltip to mouse
r578 /// Offset used to shift the tooltip of the mouse
const auto TOOLTIP_OFFSET = QPoint{20, 20};
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Uses Qt tooltips instead of QCPTextItem...
r576 /// Tooltip display rectangle (the tooltip is hidden when the mouse leaves this rectangle)
const auto TOOLTIP_RECT = QRect{10, 10, 10, 10};
/// Timeout after which the tooltip is displayed
const auto TOOLTIP_TIMEOUT = 500;
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Inits tracers and timer...
r482
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Sets tracers' styles
r485 void initPointTracerStyle(QCPItemTracer &tracer) noexcept
{
tracer.setInterpolating(false);
Alexandre Leroux
Replaces "Plus" cursor by "Circle" cursor
r577 tracer.setStyle(QCPItemTracer::tsCircle);
tracer.setSize(3);
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Sets tracers' styles
r485 tracer.setPen(QPen(Qt::black));
tracer.setBrush(Qt::black);
Display of selection zones on a graph
r1044 tracer.setSelectable(false);
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Sets tracers' styles
r485 }
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Adds button on plot overlay to show/hide x-axis properties
r729 QPixmap pixmap(const QString &iconPath) noexcept
{
return QIcon{iconPath}.pixmap(QSize{16, 16});
}
Alexandre Leroux
Adds title and close items in plot overlay
r726 void initClosePixmapStyle(QCPItemPixmap &pixmap) noexcept
{
// Icon
pixmap.setPixmap(
sqpApp->style()->standardIcon(QStyle::SP_TitleBarCloseButton).pixmap(QSize{16, 16}));
// Position
pixmap.topLeft->setType(QCPItemPosition::ptAxisRectRatio);
pixmap.topLeft->setCoords(1, 0);
pixmap.setClipToAxisRect(false);
// Can be selected
pixmap.setSelectable(true);
}
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Adds button on plot overlay to show/hide x-axis properties
r729 void initXAxisPixmapStyle(QCPItemPixmap &itemPixmap) noexcept
{
// Icon
itemPixmap.setPixmap(pixmap(HIDE_AXIS_ICON_PATH));
// Position
itemPixmap.topLeft->setType(QCPItemPosition::ptAxisRectRatio);
itemPixmap.topLeft->setCoords(0, 1);
itemPixmap.setClipToAxisRect(false);
// Can be selected
itemPixmap.setSelectable(true);
}
Alexandre Leroux
Adds title and close items in plot overlay
r726 void initTitleTextStyle(QCPItemText &text) noexcept
{
// Font and background styles
text.setColor(Qt::gray);
text.setBrush(Qt::white);
// Position
text.setPositionAlignment(Qt::AlignTop | Qt::AlignLeft);
text.position->setType(QCPItemPosition::ptAxisRectRatio);
text.position->setCoords(0.5, 0);
Display of selection zones on a graph
r1044 text.setSelectable(false);
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Adds title and close items in plot overlay
r726 }
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Tooltip for spectrograms (3)...
r1026 /**
* Returns the cell index (x or y) of a colormap according to the coordinate passed in parameter.
* This method handles the fact that a colormap axis can be logarithmic or linear.
* @param colormap the colormap for which to calculate the index
* @param coord the coord to convert to cell index
* @param xCoord calculates the x index if true, calculates y index if false
* @return the cell index
*/
int colorMapCellIndex(const QCPColorMap &colormap, double coord, bool xCoord)
{
// Determines the axis of the colormap according to xCoord, and whether it is logarithmic or not
auto isLogarithmic = (xCoord ? colormap.keyAxis() : colormap.valueAxis())->scaleType()
== QCPAxis::stLogarithmic;
if (isLogarithmic) {
// For a logarithmic axis we can't use the conversion method of colormap, so we calculate
// the index manually based on the position of the coordinate on the axis
// Gets the axis range and the number of values between range bounds to calculate the step
// between each value of the range
auto range = xCoord ? colormap.data()->keyRange() : colormap.data()->valueRange();
auto nbValues = (xCoord ? colormap.data()->keySize() : colormap.data()->valueSize()) - 1;
auto valueStep
= (std::log10(range.upper) - std::log10(range.lower)) / static_cast<double>(nbValues);
// According to the coord position, calculates the closest index in the range
return std::round((std::log10(coord) - std::log10(range.lower)) / valueStep);
}
else {
// For a linear axis, we use the conversion method of colormap
int index;
if (xCoord) {
colormap.data()->coordToCell(coord, 0., &index, nullptr);
}
else {
colormap.data()->coordToCell(0., coord, nullptr, &index);
}
return index;
}
}
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Inits tracers and timer...
r482 } // namespace
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Creates a delegate offering methods for rendering a graph
r480 struct VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegatePrivate {
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Passes directly GraphWidget in delegate...
r725 explicit VisualizationGraphRenderingDelegatePrivate(VisualizationGraphWidget &graphWidget)
: m_Plot{graphWidget.plot()},
m_PointTracer{new QCPItemTracer{&m_Plot}},
m_TracerTimer{},
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r726 m_ClosePixmap{new QCPItemPixmap{&m_Plot}},
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Adds button on plot overlay to show/hide x-axis properties
r729 m_TitleText{new QCPItemText{&m_Plot}},
m_XAxisPixmap{new QCPItemPixmap{&m_Plot}},
m_ShowXAxis{true},
Alexandre Leroux
Handles axes properties for spectrograms...
r920 m_XAxisLabel{},
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Uses SciQlop color scale in graphs
r1009 m_ColorScale{SqpColorScale{m_Plot}}
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Inits tracers and timer...
r482 {
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Sets tracers' styles
r485 initPointTracerStyle(*m_PointTracer);
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Inits tracers and timer...
r482
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Uses Qt tooltips instead of QCPTextItem...
r576 m_TracerTimer.setInterval(TOOLTIP_TIMEOUT);
Alexandre Leroux
Inits tracers and timer...
r482 m_TracerTimer.setSingleShot(true);
Alexandre Leroux
Adds title and close items in plot overlay
r726
// Inits "close button" in plot overlay
m_ClosePixmap->setLayer(OVERLAY_LAYER);
initClosePixmapStyle(*m_ClosePixmap);
Alexandre Leroux
Calls 'close graph' action when selecting close item in overlay
r727
// Connects pixmap selection to graph widget closing
Fix the close button on the graphs and multi selection in the same graph
r1054 QObject::connect(&m_Plot, &QCustomPlot::itemClick,
[&graphWidget, this](auto item, auto mouseEvent) {
if (item == m_ClosePixmap) {
Alexandre Leroux
Calls 'close graph' action when selecting close item in overlay
r727 graphWidget.close();
}
});
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Adds title and close items in plot overlay
r726 // Inits graph name in plot overlay
m_TitleText->setLayer(OVERLAY_LAYER);
m_TitleText->setText(graphWidget.name());
initTitleTextStyle(*m_TitleText);
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Adds button on plot overlay to show/hide x-axis properties
r729
// Inits "show x-axis button" in plot overlay
m_XAxisPixmap->setLayer(OVERLAY_LAYER);
initXAxisPixmapStyle(*m_XAxisPixmap);
// Connects pixmap selection to graph x-axis showing/hiding
Fix the close button on the graphs and multi selection in the same graph
r1054 QObject::connect(&m_Plot, &QCustomPlot::itemClick, [this](auto item, auto mouseEvent) {
if (m_XAxisPixmap == item) {
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Adds button on plot overlay to show/hide x-axis properties
r729 // Changes the selection state and refreshes the x-axis
m_ShowXAxis = !m_ShowXAxis;
Fix the close button on the graphs and multi selection in the same graph
r1054 this->updateXAxisState();
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Adds button on plot overlay to show/hide x-axis properties
r729 m_Plot.layer(AXES_LAYER)->replot();
// Deselects the x-axis pixmap and updates icon
m_XAxisPixmap->setPixmap(
pixmap(m_ShowXAxis ? HIDE_AXIS_ICON_PATH : SHOW_AXIS_ICON_PATH));
m_Plot.layer(OVERLAY_LAYER)->replot();
}
});
}
/// Updates state of x-axis according to the current selection of x-axis pixmap
/// @remarks the method doesn't call plot refresh
void updateXAxisState() noexcept
{
m_Plot.xAxis->setTickLabels(m_ShowXAxis);
m_Plot.xAxis->setLabel(m_ShowXAxis ? m_XAxisLabel : QString{});
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Inits tracers and timer...
r482 }
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r480
QCustomPlot &m_Plot;
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Inits tracers and timer...
r482 QCPItemTracer *m_PointTracer;
QTimer m_TracerTimer;
Alexandre Leroux
Adds title and close items in plot overlay
r726 QCPItemPixmap *m_ClosePixmap; /// Graph's close button
QCPItemText *m_TitleText; /// Graph's title
Alexandre Leroux
Adds button on plot overlay to show/hide x-axis properties
r729 QCPItemPixmap *m_XAxisPixmap;
bool m_ShowXAxis; /// X-axis properties are shown or hidden
QString m_XAxisLabel;
Alexandre Leroux
Uses SciQlop color scale in graphs
r1009 SqpColorScale m_ColorScale; /// Color scale used for some types of graphs (as spectrograms)
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Creates a delegate offering methods for rendering a graph
r480 };
Alexandre Leroux
Passes directly GraphWidget in delegate...
r725 VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegate(
VisualizationGraphWidget &graphWidget)
: impl{spimpl::make_unique_impl<VisualizationGraphRenderingDelegatePrivate>(graphWidget)}
Alexandre Leroux
Creates a delegate offering methods for rendering a graph
r480 {
}
Alexandre Leroux
Creates method that will display a tooltip and a tracer with data point information after a while
r481
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Handles double click on color scale...
r1002 void VisualizationGraphRenderingDelegate::onMouseDoubleClick(QMouseEvent *event) noexcept
{
// Opens color scale editor if color scale is double clicked
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Uses static_cast instead of dynamic_cast
r1029 auto colorScale = static_cast<QCPColorScale *>(impl->m_Plot.layoutElementAt(event->pos()));
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Calls plot refresh when the editor is closed
r1013 if (impl->m_ColorScale.m_Scale == colorScale) {
if (ColorScaleEditor{impl->m_ColorScale}.exec() == QDialog::Accepted) {
impl->m_Plot.replot();
}
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Handles double click on color scale...
r1002 }
}
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Creates method that will display a tooltip and a tracer with data point information after a while
r481 void VisualizationGraphRenderingDelegate::onMouseMove(QMouseEvent *event) noexcept
{
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Inits tracers and timer...
r482 // Cancels pending refresh
impl->m_TracerTimer.disconnect();
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r576 // Reinits tracers
impl->m_PointTracer->setGraph(nullptr);
impl->m_PointTracer->setVisible(false);
impl->m_Plot.replot();
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Tooltip for spectrograms (1)...
r1024 QString tooltip{};
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r576 // Gets the graph under the mouse position
auto eventPos = event->pos();
if (auto graph = qobject_cast<QCPGraph *>(impl->m_Plot.plottableAt(eventPos))) {
auto mouseKey = graph->keyAxis()->pixelToCoord(eventPos.x());
auto graphData = graph->data();
// Gets the closest data point to the mouse
auto graphDataIt = graphData->findBegin(mouseKey);
if (graphDataIt != graphData->constEnd()) {
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Tooltip for spectrograms (1)...
r1024 // Sets tooltip
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Uses Qt tooltips instead of QCPTextItem...
r576 auto key = formatValue(graphDataIt->key, *graph->keyAxis());
auto value = formatValue(graphDataIt->value, *graph->valueAxis());
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Tooltip for spectrograms (1)...
r1024 tooltip = GRAPH_TOOLTIP_FORMAT.arg(key, value);
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r576
// Displays point tracer
impl->m_PointTracer->setGraph(graph);
impl->m_PointTracer->setGraphKey(graphDataIt->key);
impl->m_PointTracer->setLayer(
impl->m_Plot.layer("main")); // Tracer is set on top of the plot's main layer
impl->m_PointTracer->setVisible(true);
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Show tracers method (2)...
r484 impl->m_Plot.replot();
Alexandre Leroux
Tooltip for spectrograms (1)...
r1024 }
}
else if (auto colorMap = qobject_cast<QCPColorMap *>(impl->m_Plot.plottableAt(eventPos))) {
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r1025 // Gets x and y coords
auto x = colorMap->keyAxis()->pixelToCoord(eventPos.x());
auto y = colorMap->valueAxis()->pixelToCoord(eventPos.y());
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Tooltip for spectrograms (3)...
r1026
// Calculates x and y cell indexes, and retrieves the underlying value
auto xCellIndex = colorMapCellIndex(*colorMap, x, true);
auto yCellIndex = colorMapCellIndex(*colorMap, y, false);
auto value = colorMap->data()->cell(xCellIndex, yCellIndex);
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Tooltip for spectrograms (4)...
r1027 // Sets tooltips
tooltip = COLORMAP_TOOLTIP_FORMAT.arg(formatValue(x, *colorMap->keyAxis()),
formatValue(y, *colorMap->valueAxis()),
formatValue(value, *colorMap->colorScale()->axis()));
Alexandre Leroux
Tooltip for spectrograms (1)...
r1024 }
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Inits tracers and timer...
r482
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Tooltip for spectrograms (1)...
r1024 if (!tooltip.isEmpty()) {
// Starts timer to show tooltip after timeout
auto showTooltip = [tooltip, eventPos, this]() {
QToolTip::showText(impl->m_Plot.mapToGlobal(eventPos) + TOOLTIP_OFFSET, tooltip,
&impl->m_Plot, TOOLTIP_RECT);
};
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r576
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Tooltip for spectrograms (1)...
r1024 QObject::connect(&impl->m_TracerTimer, &QTimer::timeout, showTooltip);
impl->m_TracerTimer.start();
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Uses Qt tooltips instead of QCPTextItem...
r576 }
Alexandre Leroux
Creates method that will display a tooltip and a tracer with data point information after a while
r481 }
Alexandre Leroux
Shows/hides plot overlay when entering/leaving graph
r728
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Updates sqp color scale thresholds (2)...
r1020 void VisualizationGraphRenderingDelegate::onPlotUpdated() noexcept
{
// Updates color scale bounds
impl->m_ColorScale.updateDataRange();
impl->m_Plot.replot();
}
Alexandre Leroux
Refactoring handling of axes properties (2)...
r916 void VisualizationGraphRenderingDelegate::setAxesProperties(
std::shared_ptr<IDataSeries> dataSeries) noexcept
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r729 {
// Stores x-axis label to be able to retrieve it when x-axis pixmap is unselected
Alexandre Leroux
Refactoring handling of axes properties (2)...
r916 impl->m_XAxisLabel = dataSeries->xAxisUnit().m_Name;
Alexandre Leroux
Adds button on plot overlay to show/hide x-axis properties
r729
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Refactoring handling of axes properties (2)...
r916 auto axisHelper = IAxisHelperFactory::create(dataSeries);
Alexandre Leroux
Uses SciQlop color scale in graphs
r1009 axisHelper->setProperties(impl->m_Plot, impl->m_ColorScale);
Alexandre Leroux
Adds button on plot overlay to show/hide x-axis properties
r729
// Updates x-axis state
impl->updateXAxisState();
impl->m_Plot.layer(AXES_LAYER)->replot();
}
Alexandre Leroux
Handles rendering of plottables (3)...
r919 void VisualizationGraphRenderingDelegate::setPlottablesProperties(
std::shared_ptr<IDataSeries> dataSeries, PlottablesMap &plottables) noexcept
{
auto plottablesHelper = IPlottablesHelperFactory::create(dataSeries);
plottablesHelper->setProperties(plottables);
}
Alexandre Leroux
Shows/hides plot overlay when entering/leaving graph
r728 void VisualizationGraphRenderingDelegate::showGraphOverlay(bool show) noexcept
{
auto overlay = impl->m_Plot.layer(OVERLAY_LAYER);
overlay->setVisible(show);
overlay->replot();
}