#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QMouseEvent>
#include <QDebug>
#include "my_qlabel.h"
#include<QTimer>
int px;
int py;
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
tmrTimer = new QTimer(this);
connect(tmrTimer,SIGNAL(timeout()),this,SLOT(showthepositionofmouse()));
tmrTimer->start(20);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::showthepositionofmouse()
{
ui->plainTextEdit->appendPlainText(QString(" x , y = ")+QString::number(px)+QString::number(py));
}
void my_qlabel::mousePressEvent(QMouseEvent *event)
{
if (event->button()==Qt::RightButton){
px = event->x();
py = event->y();
}
}
我想显示鼠标点击的位置,我ui->plainTextEdit->appendPlainText(QString(" x , y = ")+QString::number(px)+QString::number(py));
用来显示这个位置。虽然我点击鼠标,它只显示x,y = 0 0
。为什么?