104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
#include "ledindicator.h"
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#include <QPainter>
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#include <QRadialGradient>
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#include <QFontMetrics>
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#include "global.h"
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QSize LedIndicator::sizeHint() const
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{
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QFont f = font();
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f.setPixelSize(m_textPx);
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const QFontMetrics fm(f);
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// 宽度 = 文字起点(圆点区 + 左侧 10px) + 文字宽度 + 右侧 10px
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const int w = textLeft() + fm.horizontalAdvance(m_text) + 10;
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return QSize(w, 52); // 高度与构造函数 setFixedHeight(52) 一致
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}
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LedIndicator::LedIndicator(const QString& text, QWidget* parent)
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: QWidget(parent), m_text(text)
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{
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setFixedHeight(52);
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setAttribute(Qt::WA_TranslucentBackground);
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}
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void LedIndicator::setState(State s)
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{
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m_state = s;
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bool needBlink = (s == RedBlink || s == YellowBlink);
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if (needBlink && !m_blink) {
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m_blink = new QTimer(this);
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m_blink->setInterval(500);
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connect(m_blink, &QTimer::timeout, this, [this]() {
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m_on = !m_on;
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update();
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});
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m_blink->start();
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m_on = true;
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} else if (!needBlink && m_blink) {
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m_blink->stop();
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delete m_blink;
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m_blink = nullptr;
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m_on = true;
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}
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update();
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}
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void LedIndicator::setText(const QString& t)
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{
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m_text = t;
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updateGeometry(); // 文字变了，重新按新宽度请求布局
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update();
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}
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void LedIndicator::paintEvent(QPaintEvent*)
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{
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QPainter p(this);
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p.setRenderHint(QPainter::Antialiasing);
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// 中心圆点颜色
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QColor color = QColor(C::DISABLED); // 灰
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switch (m_state) {
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case Green: color = QColor(C::SUCCESS); break;
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case Red: color = QColor(C::DANGER); break;
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case Yellow: color = QColor(C::WARNING); break;
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case RedBlink: color = QColor(C::DANGER); break;
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case YellowBlink: color = QColor(C::WARNING); break;
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default: color = QColor(C::DISABLED); break;
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}
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// 闪烁：40% 透明度
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if ((m_state == RedBlink || m_state == YellowBlink) && !m_on)
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color.setAlpha(102);
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const QPointF c(m_radius + 8, height() / 2.0);
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// 外发光
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if (color.alpha() > 0) {
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QRadialGradient glow(c, m_radius + 8);
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QColor g = color; g.setAlpha(color.alpha() / 3);
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QColor g0 = g; g0.setAlpha(0);
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glow.setColorAt(0.0, g);
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glow.setColorAt(1.0, g0);
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p.setPen(Qt::NoPen);
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p.setBrush(glow);
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p.drawEllipse(c, m_radius + 8, m_radius + 8);
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}
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// 圆形主体（径向渐变）
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QRadialGradient grad(c + QPointF(-m_radius / 3.0, -m_radius / 3.0), m_radius * 1.6);
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QColor hi = color.lighter(130);
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grad.setColorAt(0.0, hi);
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grad.setColorAt(1.0, color);
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p.setBrush(grad);
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p.setPen(QPen(QColor(C::BORDER), 1));
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p.drawEllipse(c, m_radius, m_radius);
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// 文字
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p.setPen(QColor(C::TEXT));
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QFont f = p.font();
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f.setPixelSize(m_textPx);
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p.setFont(f);
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const QRectF textRect(textLeft(), 0, width() - textLeft() - 10, height());
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p.drawText(textRect, Qt::AlignLeft | Qt::AlignVCenter, m_text);
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}
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