43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
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#ifndef DRAGQCPTEXT_H
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#define DRAGQCPTEXT_H
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#include "qcustomplot.h"
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class DraggableText : public QCPItemText {
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public:
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DraggableText(QCustomPlot *parentPlot) : QCPItemText(parentPlot) {
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///setClipToAxis(false); // 允许拖出轴范围
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}
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protected:
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QPointF clickPos; // 记录鼠标点击位置
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bool isDragging = false; // 是否正在拖动
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void mousePressEvent(QMouseEvent *event, const QPointF &pos) {
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QCPItemText::mousePressEvent(event, pos);
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if (event->button() == Qt::RightButton) {
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clickPos = pos; // 记录点击位置
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}
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}
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void mouseMoveEvent(QMouseEvent *event, const QPointF &pos) override {
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QCPItemText::mouseMoveEvent(event, pos);
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if (isDragging) {
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double dx = pos.x() - clickPos.x();
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double dy = pos.y() - clickPos.y();
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position->setCoords(position->coords().x() + dx, position->coords().y() + dy);
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}
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}
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void mouseReleaseEvent(QMouseEvent *event, const QPointF &pos) override {
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QCPItemText::mouseReleaseEvent(event, pos);
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if (event->button() == Qt::RightButton) {
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isDragging = false;
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}
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}
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};
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#endif // DRAGQCPTEXT_H
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