#include <QApplication>
#include <QMainWindow>
#include <QDateTime>
#include <QChartView>
#include <QLineSeries>
QT_CHARTS_USE_NAMESPACE
int main(int argc, char **argv) {
QApplication application(argc, argv);
auto *series01 = new QLineSeries();
series01->setName("line01");
...
auto *series02 = new QLineSeries();
series02->setName("line02");
...
auto *chart = new QChart();
chart->legend()->hide();
chart->addSeries(series01);
chart->addSeries(series02);
series01->setUseOpenGL(true);
chart->createDefaultAxes();
chart->setTitle(QStringLiteral("Qt line chart example"));
auto *view = new QChartView(chart, nullptr);
view->setRenderHint(QPainter::Antialiasing);
view->resize(1000, 600);
view->show();
return QApplication::exec();
}
當前折線圖如下所示：
如何為這兩行顯示它們各自的名稱？
你只需要顯示他們的名字，顏色需要對應，位置和形狀不需要。
uj5u.com熱心網友回復：
這是因為你隱藏了 legend
#include <QApplication>
#include <QMainWindow>
#include <QDateTime>
#include <QChartView>
#include <QLineSeries>
QT_CHARTS_USE_NAMESPACE
int main(int argc, char **argv)
{
QApplication application(argc, argv);
auto *series01 = new QLineSeries();
series01->setName("line01");
series01->append(0, 0);
series01->append(2, 5.5);
series01->append(3.2, 8);
series01->append(8, 9);
series01->append(11, 4);
auto *series02 = new QLineSeries();
series02->setName("line02");
series02->append(0, 0);
series02->append(1.5, 2);
series02->append(4, 4);
series02->append(6, 6);
series02->append(7.5, 8);
series02->append(7.5, 1);
series02->append(8.1, 5);
auto *chart = new QChart();
// chart->legend()->hide();
chart->addSeries(series01);
chart->addSeries(series02);
series01->setUseOpenGL(true);
chart->createDefaultAxes();
chart->setTitle(QStringLiteral("Qt line chart example"));
auto *view = new QChartView(chart, nullptr);
view->setRenderHint(QPainter::Antialiasing);
view->resize(1000, 600);
view->show();
return QApplication::exec();
}
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