QT的汽车仪表盘源码，可编译可运行

#include "form_km.h" #include "ui_form_km.h" Form_KM::Form_KM(QWidget *parent) : QWidget(parent), ui(new Ui::Form_KM) { ui->setupUi(this); ui->label_Scale->setStyleSheet("border-image:url(:/KM/Images/Km/Km_background.png)"); m_pointX = 200; m_pointY = 200; m_degreespeed = 0; m_degreeRotate = 0; } Form_KM::~Form_KM() { delete ui; } void Form_KM::paintEvent(QPaintEvent *) { QImage imagePointer(":/KM/Images/Km/Point.png"); QPainter painter(this); QRect rct(32,39,324,324); painter.translate(m_pointX,m_pointY); painter.rotate(-14+m_degreespeed); painter.translate((0 - m_pointX),(0-m_pointY)); painter.setRenderHint(QPainter::SmoothPixmapTransform,true); painter.drawImage(rct,imagePointer); painter.save(); painter.restore(); } void Form_KM::change_Speed(float temp) { m_degreespeed = temp; update(); }