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Plot: show x and y values on a tooltip when hovering over the plot

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See issue #3186
This commit is contained in:
mgrojo
2022-12-27 00:35:20 +01:00
parent c0adfe43c5
commit ce176be2b4
2 changed files with 44 additions and 8 deletions
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49
src/PlotDock.cpp
View File

@@ -21,6 +21,9 @@
#include <QElapsedTimer>
#endif
#include <QMouseEvent>
#include <QLocale>
static int random_number(int from, int to)
{
#if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
@@ -37,7 +40,8 @@ PlotDock::PlotDock(QWidget* parent)
m_currentTableSettings(nullptr),
m_showLegend(false),
m_stackedBars(false),
m_fixedFormat(false)
m_fixedFormat(false),
m_xtype(QVariant::Invalid)
{
ui->setupUi(this);
@@ -55,6 +59,7 @@ PlotDock::PlotDock(QWidget* parent)
// connect slots that takes care that when an axis is selected, only that direction can be dragged and zoomed:
connect(ui->plotWidget, &QCustomPlot::mousePress, this, &PlotDock::mousePress);
connect(ui->plotWidget, &QCustomPlot::mouseWheel, this, &PlotDock::mouseWheel);
connect(ui->plotWidget, &QCustomPlot::mouseMove, this, &PlotDock::mouseMove);
// Enable: click on items to select them, Ctrl+Click for multi-selection, mouse-wheel for zooming and mouse drag for
// changing the visible range.
@@ -300,12 +305,12 @@ void PlotDock::updatePlot(SqliteTableModel* model, BrowseDataTableSettings* sett
// regain the model column index and the datatype
// right now datatype is only important for X axis (Y is always numeric)
int x = xitem->data(PlotColumnField, Qt::UserRole).toInt();
unsigned int xtype = xitem->data(PlotColumnType, Qt::UserRole).toUInt();
m_xtype = xitem->data(PlotColumnType, Qt::UserRole).toUInt();
ui->plotWidget->xAxis->setTickLabelRotation(0);
// check if we have a x axis with datetime data
switch (xtype) {
switch (m_xtype) {
case QVariant::Date: {
QSharedPointer<QCPAxisTickerDateTime> ticker(new QCPAxisTickerDateTime);
ticker->setDateTimeFormat("yyyy-MM-dd");
@@ -379,7 +384,7 @@ void PlotDock::updatePlot(SqliteTableModel* model, BrowseDataTableSettings* sett
// NULL values produce gaps in the linear graphs. We use NaN values in
// that case as required by QCustomPlot.
// Bar plots will display the configured string for NULL values.
if(xtype == QVariant::String) {
if(m_xtype == QVariant::String) {
xdata[j] = j+1;
labels << model->data(model->index(j, x), Qt::DisplayRole).toString();
} else
@@ -387,7 +392,7 @@ void PlotDock::updatePlot(SqliteTableModel* model, BrowseDataTableSettings* sett
} else {
// convert x type axis if it's datetime
switch (xtype) {
switch (m_xtype) {
case QVariant::DateTime:
case QVariant::Date: {
QString s = model->data(model->index(j, x)).toString();
@@ -441,8 +446,8 @@ void PlotDock::updatePlot(SqliteTableModel* model, BrowseDataTableSettings* sett
}
// Line type and point shape are not supported by the String X type (Bars)
ui->comboLineType->setEnabled(xtype != QVariant::String);
ui->comboPointShape->setEnabled(xtype != QVariant::String);
ui->comboLineType->setEnabled(m_xtype != QVariant::String);
ui->comboPointShape->setEnabled(m_xtype != QVariant::String);
// WARN: ssDot is removed
int shapeIdx = ui->comboPointShape->currentIndex();
@@ -455,7 +460,7 @@ void PlotDock::updatePlot(SqliteTableModel* model, BrowseDataTableSettings* sett
// When it is not sorted by x, we draw a curve, so the order selected by the user in the table or in the query is
// respected. In this case the line will have loops and only None and Line is supported as line style.
// TODO: how to make the user aware of this without disturbing.
if (xtype == QVariant::String) {
if (m_xtype == QVariant::String) {
for(size_t y_ind = 0; y_ind < 2; y_ind++)
{
@@ -905,6 +910,34 @@ void PlotDock::mousePress()
}
}
void PlotDock::mouseMove(QMouseEvent* event)
{
double x = ui->plotWidget->xAxis->pixelToCoord(event->pos().x());
double y = ui->plotWidget->yAxis->pixelToCoord(event->pos().y());
QString xLabel;
switch (m_xtype) {
case QVariant::Date:
xLabel = QDateTime::fromMSecsSinceEpoch(static_cast<qint64>(x*1000.0)).toString("yyyy-MM-dd, ");
break;
case QVariant::Time:
xLabel = QDateTime::fromMSecsSinceEpoch(static_cast<qint64>(x*1000.0), Qt::UTC).toString("hh:mm:ss, ");
break;
case QVariant::DateTime:
xLabel = QDateTime::fromMSecsSinceEpoch(static_cast<qint64>(x*1000.0)).toString("yyyy-MM-dd hh:mm:ss, ");
break;
case QVariant::String:
// In this case, only the y value is displayed
xLabel = QString("y=");
break;
default:
xLabel = QLocale().toString(x) + ", ";
}
ui->plotWidget->setToolTip(xLabel + QLocale().toString(y));
}
void PlotDock::mouseWheel()
{
// Allow user to reset the plot

3
src/PlotDock.h
View File

@@ -12,6 +12,7 @@ class QMenu;
class QPrinter;
class QTreeWidgetItem;
class QCPAxis;
class QMouseEvent;
class SqliteTableModel;
struct BrowseDataTableSettings;
@@ -100,6 +101,7 @@ private:
Palette m_graphPalette;
std::vector<QCPAxis *> yAxes;
std::vector<int> PlotColumnY;
unsigned int m_xtype;
/*!
* \brief guessdatatype try to parse the first 10 rows and decide the datatype
@@ -120,6 +122,7 @@ private slots:
void selectionChanged();
void mousePress();
void mouseWheel();
void mouseMove(QMouseEvent* event);
void copy();
void toggleLegendVisible(bool visible);
void toggleStackedBars(bool stacked);