Question

我是新的qt c ++。我想绘制一个三角形。但我面临太多错误。它不会重新识别poly和qpoint以及* e 帮帮我PLZ

#include "dialog.h"
#include "ui_dialog.h"
#include <QtCore>
#include <QtGui>
#include <QGraphicsScene>
#include <QGraphicsEllipseItem>
#include<qpainter.h>
#include<QPolygon>
#include<QPoint>
#include<QPainter>
#include<QPaintEvent>

Dialog::Dialog(int a1,int b1,int a2,int b2,int a3,int b3,char t,QWidget *parent):
QDialog(parent),

ui(new Ui::Dialog),
x1(a1),x2(a2),x3(a3),y1(b1),y2(b2),y3(b3),type(t)
{
ui->setupUi(this);
scene = new QGraphicsScene(this);
scene = new QGraphicsScene(this);
ui->graphicsView->setScene(scene);

QBrush redBrush (Qt::red);
QPen blackpen(Qt::black);
blackpen.setWidth(1);
if(type=='c')
    ellipse = scene->addEllipse(0,0,10,10,blackpen,redBrush);
else if(type=='l')
{
    //draw line
}
else
{
    //draw traingle
    paintEvent(QPaintEvent *e);

错误：在此scop中未声明'e' }

}
void Dialog::paintEvent(QPaintEvent *e)
{
QPainter painter(this);

QPolygon poly;
poly «QPoint(100,150);

错误：在程序中迷路'\ 302' poly«; QPoint（120,130）; ^ poly«QPoint（90,130）; poly«QPoint（120,130）;

          QPen linepen;
   linepen.setWidth(8);
   linepen.setColor(Qt::red);
   linepen.setJoinStyle(Qt::MiterJoin);
   painter.setPen(linepen);

   QBrush fillbrush;
   fillbrush.setColor(Qt::red);
   fillbrush.setStyle(Qt::SolidPattern);

   QPainterPath path;
   path.addPolygon(poly);

   painter.drawPolygon(poly);
   painter.fillPath(path,fillbrush);}


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

用qt绘制多边形

0 个答案: