1.Mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include<qpainter.h>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::setFixedSize ( int w, int h )
{
setFixedSize(400,400);
}
void MainWindow::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event);
QPainter painter(this);
// 设置画笔颜色
painter.setPen(QColor(0,0,0));
// 反走样
painter.setRenderHint(QPainter::Antialiasing, true);
// 设置画笔颜色、宽度
// 设置画刷颜色
painter.setBrush(QColor(Qt::blue));
for(int i=0;i<6;i++)
{
for(int j=0;j<6;j++)
{
painter.drawRect(50+j*50, 50+i*50, 50, 50);
}
}
painter.setPen(QColor(0,0,0));
painter.setBrush(QColor(255, 0, 0));
int xx=(x-50)/50+1;
int yy=(y-50)/50+1;
painter.drawRect(xx*50, yy*50, 50, 50);
}
void MainWindow::mousePressEvent(QMouseEvent *e)
{
x=e->x();
y=e->y();
update();
}
2.MainWindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include<QMouseEvent>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private:
Ui::MainWindow *ui;
void paintEvent(QPaintEvent *event);
void mousePressEvent(QMouseEvent *e);
void setFixedSize(int w, int h);
int x;
int y;
};
#endif // MAINWINDOW_H
windows2017Exam02
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转载自blog.csdn.net/qq_39157144/article/details/80855178
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