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module/radio/component/Electricity.cpp

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+#include "Electricity.h"
+#include <QPainter>
+
+Electricity::Electricity(QWidget *parent) : QWidget(parent) {
+}
+
+void Electricity::paintEvent(QPaintEvent *event) {
+    QPainter painter(this);
+    painter.fillRect(rect(), Qt::red);
+    painter.end();
+}