[QT] custom control - air quality dashboard

【QT】 Custom control - Air quality dashboard

pro file

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = QAirDashboard
TEMPLATE = app


SOURCES += main.cpp\
        qdashboard.cpp

HEADERS  += qdashboard.h

qdashboard.h

#ifndef QDASHBOARD_H
#define QDASHBOARD_H

#include <QWidget>
#include <QPainter>
#include <QFont>
#include <QBrush>
#include <QColor>
#include <QPaintDevice>
#include <QPaintEngine>
#include <QPixmap>
#include <QPainterPath>
#include <QDebug>
#include <QLCDNumber>
#include <QRect>
#include <QRectF>
#include <QPoint>
#include <QPointF>
#include <QLabel>
class QDashboard : public QWidget
{
    Q_OBJECT

public:
    QDashboard(QWidget *parent = 0);
    ~QDashboard();

    void change_color(QColor color);
    void change_color(QColor col