118 lines
3.5 KiB
C++
118 lines
3.5 KiB
C++
#include "PlotRectItem.h"
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#include <QPainter>
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#include <QwtScaleMap>
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PlotRectItem::PlotRectItem(const QString &title)
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: QwtPlotItem(), m_isHovered(false), m_hasPeakData(false)
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,m_selectionType(""), m_selectionIndex(-1)
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{
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setTitle(title);
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setZ(1000);
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// 初始化普通状态画笔：红色虚线，线宽2
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m_normalPen = QPen(Qt::red, 2, Qt::DashLine);
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// 初始化悬停状态画笔：红色实线，线宽2
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m_hoverPen = QPen(Qt::red, 2, Qt::SolidLine);
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m_brush = QBrush(QColor(255, 0, 0, 30));
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}
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void PlotRectItem::setRect(const QRectF &rect) {
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m_rect = rect;
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itemChanged(); // 触发重绘
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}
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void PlotRectItem::setPen(const QPen &pen) {
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m_normalPen = pen;
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// 同步悬停画笔的颜色和宽度，仅改变线型
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m_hoverPen = pen;
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m_hoverPen.setStyle(Qt::SolidLine);
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itemChanged();
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}
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void PlotRectItem::setBrush(const QBrush &brush) {
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m_brush = brush;
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itemChanged();
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}
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//设置悬停状态
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void PlotRectItem::setHovered(bool hovered) {
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if (m_isHovered != hovered) {
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m_isHovered = hovered;
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itemChanged(); // 触发重绘
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}
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}
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//获取悬停状态
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bool PlotRectItem::isHovered() const {
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return m_isHovered;
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}
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//获取矩形区域
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QRectF PlotRectItem::rect() const {
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return m_rect;
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}
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void PlotRectItem::setPeakData(double center, double fwhm, double area, double baseline)
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{
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m_hasPeakData = true;
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m_peakCenter = center;
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m_fwhm = fwhm;
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m_peakArea = area;
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m_baseline = baseline;
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itemChanged(); // 触发重绘
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}
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void PlotRectItem::draw(QPainter *painter,
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const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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const QRectF &) const {
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const int x1 = xMap.transform(m_rect.left());
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const int x2 = xMap.transform(m_rect.right());
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const int y1 = yMap.transform(m_rect.top());
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const int y2 = yMap.transform(m_rect.bottom());
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const QRect rect(QPoint(x1, y1), QPoint(x2, y2));
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painter->save();
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// 根据悬停状态选择画笔
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painter->setPen(m_isHovered ? m_hoverPen : m_normalPen);
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painter->setBrush(m_brush);
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painter->drawRect(rect);
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painter->restore();
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if (m_hasPeakData) {
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painter->save();
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painter->setRenderHint(QPainter::TextAntialiasing);
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// 构建文本内容
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QString text = QString("峰位: %1 keV\n"
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"FWHM: %2\n"
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"面积: %3\n"
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"本底: %4")
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.arg(m_peakCenter, 0, 'f', 2)
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.arg(m_fwhm, 0, 'f', 2)
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.arg(m_peakArea, 0, 'f', 2)
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.arg(m_baseline, 0, 'f', 2);
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// 计算文本位置：矩形右上角 + 偏移量
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QPoint textPos(x2 + 10, y2);
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// 绘制半透明背景框（增强可读性）
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QFont font = painter->font();
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font.setPointSize(9); // 稍微小一点
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painter->setFont(font);
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QFontMetrics fm(font);
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QRect textRect = fm.boundingRect(QRect(0, 0, 1, 1), Qt::AlignLeft, text);
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textRect.moveTopLeft(textPos);
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textRect.adjust(-5, -3, 5, 3); // 增加边距
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painter->fillRect(textRect, QColor(255, 255, 255, 220)); // 白底微透
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painter->setPen(Qt::black);
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painter->drawText(textRect, Qt::AlignLeft, text);
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painter->restore();
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}
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}
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QRectF PlotRectItem::boundingRect() const {
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return m_rect;
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}
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