Not able to draw lines inside QPaintEvent

NIXIN

Refer the code below

draw.h

#ifndef DRAW_H
#define DRAW_H

#include <QWidget>
#include <QPainter>
#include <QLabel>
#include <QDebug>

namespace Ui {
class Draw;
}

class Draw : public QWidget
{
Q_OBJECT

public:
explicit Draw(QWidget *parent = 0);
~Draw();

void line();
void paintEvent(QPaintEvent *e);
void drawLabel();

int flag = 0;

private slots:
void on_pushButton_clicked();

private:
Ui::Draw *ui;
};

#endif // DRAW_H

draw.cpp

#include "draw.h"
#include "ui_draw.h"

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

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

void Draw::paintEvent(QPaintEvent *e)
{
QPainter *painter = new QPainter(this);
if(flag == 1)
{
painter->setPen(QPen(Qt::black, 1));
painter->drawLine(20, 50, 70, 50);
painter->drawLine(120, 50, 170, 50);
drawLabel();
}
}

void Draw::drawLabel()
{
QLabel *label = new QLabel(this);
label->setStyleSheet("border: 1px solid black");
label->setGeometry(70, 40, 50, 20);
label->show();
}

void Draw::on_pushButton_clicked()
{
flag = 1;
}

main.cpp

#include "draw.h"
#include <QApplication>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Draw w;
w.show();

return a.exec();

}

I am trying to draw a label between two lines, when a push button is clicked. but when I am clicking the pushbutton I am seeing only label, the two lines are missing. Please help me to achieve this.

Jan-Willem

Try this:

void Draw::on_pushButton_clicked()
{
    flag = 1;
    update();
}

NIXIN

Thanx, it really solved my problem