量化交易之QT篇 - 绘图设备(QPixmap、QPainter)

// Widget.cpp

#include "Widget.h"
#include "ui_Widget.h"
#include <QPixmap>
#include <QPainter>


Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);

    /*
    QPixmap pix(300, 300);
    pix.fill(Qt::white); // 填充颜色

    // 声明画家
    QPainter painter(&pix);
    painter.setPen(QPen(Qt::green));
    painter.drawEllipse(QPoint(150, 150), 100, 100);

    // 保存
    pix.save("C:/Users/win10/Desktop/test.png");
    */


    /*
    QImage image(300, 300, QImage::Format_RGB32);
    image.fill(Qt::white);

    QPainter painter(&image);
    painter.setPen(Qt::blue);
    painter.drawEllipse(QPoint(150, 150), 100, 100);

    image.save("C:/Users/win10/Desktop/test.png");
    */
}


Widget::~Widget()
{
    delete ui;
}