monitor/src/canvas.cpp

#include "canvas.h"
#include <QPainter>

Canvas::Canvas(QWidget *parent)
    : QWidget{parent}
    , m_backgroundColor(Qt::black)
{

}

Canvas::~Canvas()
{

}

const QColor &Canvas::backgroundColor() const
{
    return m_backgroundColor;
}

void Canvas::setBackgroundColor(const QColor &newBackgroundColor)
{
    m_backgroundColor = newBackgroundColor;
}

void Canvas::paintEvent(QPaintEvent *event)
{
    // 绘制背景颜色
    QPainter painter(this);
    painter.fillRect(rect(), m_backgroundColor);
}