simLive/CustomChartView.cpp at main · Anarxist2004/simLive · GitHub

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#include "stdafx.h"
#include "CustomChartView.h"

void CustomChartView::wheelEvent(QWheelEvent* event)
{
    QChartView::wheelEvent(event);

    // Ïîëó÷àåì òåêóùèå îñè ãðàôèêà
    QValueAxis* axisX = qobject_cast<QValueAxis*>(chart()->axes(Qt::Horizontal).first());
    QValueAxis* axisY = qobject_cast<QValueAxis*>(chart()->axes(Qt::Vertical).first());

    if (axisX && axisY) {
        // Èçìåíåíèå äèàïàçîíà îñåé ïðè ïðîêðóòêå êîëåñèêà ìûøè
        if (event->angleDelta().y() > 0) { // Ïðè ïðîêðóòêå âïåðåä (ìàñøòàáèðóåì ââåðõ)
            axisX->setRange(axisX->min() * 0.9, axisX->max() * 0.9);
            axisY->setRange(axisY->min() * 0.9, axisY->max() * 0.9);
        }
        else { // Ïðè ïðîêðóòêå íàçàä (ìàñøòàáèðóåì âíèç)
            axisX->setRange(axisX->min() * 1.1, axisX->max() * 1.1);
            axisY->setRange(axisY->min() * 1.1, axisY->max() * 1.1);
        }
    }
}

void CustomChartView::mousePressEvent(QMouseEvent* event)
{
    if (event->button() == Qt::LeftButton) {
        m_isDragging = true;
        m_dragStartPos = event->pos();
    }
}
void CustomChartView::mouseMoveEvent(QMouseEvent* event)
{
    if (m_isDragging) {
        // Âû÷èñëÿåì ñìåùåíèå
        int deltaX = event->pos().x() - m_dragStartPos.x();
        int deltaY = event->pos().y() - m_dragStartPos.y();

        // Èçìåíÿåì ïîçèöèþ ãðàôèêà
        chart()->scroll(-deltaX, deltaY);  // Ïåðåìåùåíèå ãðàôèêà âëåâî/âïðàâ

        // Îáíîâëÿåì íà÷àëüíóþ ïîçèöèþ
        m_dragStartPos = event->pos();


    }
    QPointF point = chart()->mapToValue(event->pos());

    // Ïîëó÷àåì çíà÷åíèÿ ïî îñÿì X è Y
    qreal x = point.x();
    qreal yFood = 0;
    qreal yAnimal = 0;

    // Íàõîäèì çíà÷åíèÿ ïî Y äëÿ êàæäîé ñåðèè (ìîæíî äîðàáîòàòü äëÿ íàõîæäåíèÿ áëèæàéøèõ òî÷åê)
    if (seriesCntrFood && seriesCntrFood->count() > 0) {
        qreal minDistFood = std::numeric_limits<qreal>::max();  // Ìèíèìàëüíîå ðàññòîÿíèå
        for (int i = 0; i < seriesCntrFood->count(); ++i) {
            qreal dist = std::abs(seriesCntrFood->at(i).x() - x);
            if (dist < minDistFood) {
                minDistFood = dist;
                yFood = seriesCntrFood->at(i).y();  // Çàïîìèíàåì çíà÷åíèå Y äëÿ áëèæàéøåé òî÷êè
            }
        }
    }

    // Ïîèñê áëèæàéøåé òî÷êè â ñåðèè animal
    if (seriesCntrAnimal && seriesCntrAnimal->count() > 0) {
        qreal minDistAnimal = std::numeric_limits<qreal>::max();  // Ìèíèìàëüíîå ðàññòîÿíèå
        for (int i = 0; i < seriesCntrAnimal->count(); ++i) {
            qreal dist = std::abs(seriesCntrAnimal->at(i).x() - x);
            if (dist < minDistAnimal) {
                minDistAnimal = dist;
                yAnimal = seriesCntrAnimal->at(i).y();  // Çàïîìèíàåì çíà÷åíèå Y äëÿ áëèæàéøåé òî÷êè
            }
        }
    }

    QString tooltipText = QString("X: %1, Food: %2, Animal: %3").arg(x).arg(yFood).arg(yAnimal);
    QToolTip::showText(event->globalPos(), tooltipText);
}
void CustomChartView::mouseReleaseEvent(QMouseEvent* event)
{
    if (event->button() == Qt::LeftButton) {
        m_isDragging = false;
    }
}