qt多线程显示图片.rar

#include "widget.h" #include "ui_widget.h" Widget::Widget(QWidget *parent) : QWidget(parent) , ui(new Ui::Widget) { ui->setupUi(this); ui->pBStart->setEnabled(true); ui->pBPause->setEnabled(false); ui->pBEnd->setEnabled(false); ui->label->setScaledContents(true); ui->label_2->setScaledContents(true); for(int i=0;i<threadNum;i++) { thread[i].setThreadID(i); connect(&thread[i],SIGNAL(pictureNumber(int,int)),this,SLOT(getPicture(int ,int))); } } Widget::~Widget() { delete ui; } void Widget::getPicture(int num,int threadID) { QPixmap temp; QString path="pictures/"; path+=QString::number(num+1); path=path+".png"; temp.load(path); if(threadID==0) ui->label->setPixmap(temp); if(threadID==1) ui->label_2->setPixmap(temp); } void Widget::on_pBStart_clicked() { qDebug()<<"the begin"; for(int i=0;i<threadNum;i++) { thread[i].start(); thread[i].threadBegin(); } ui->pBStart->setEnabled(false); ui->pBPause->setEnabled(true); ui->pBEnd->setEnabled(true); } void Widget::on_pBPause_clicked() { for(int i=0;i<threadNum;i++) { thread[i].threadPause(); } QString text; if(ui->pBPause->text()==QString::fromLocal8Bit("暂停")) text=QString::fromLocal8Bit("继续"); else if(ui->pBPause->text()==QString::fromLocal8Bit("继续")) text=QString::fromLocal8Bit("暂停"); ui->pBPause->setText(text); } void Widget::on_pBEnd_clicked() { for(int i=0;i<threadNum;i++) { thread[i].threadStop(); } ui->pBStart->setEnabled(true); ui->pBEnd->setEnabled(false); ui->pBPause->setEnabled(false); } void Widget::closeEvent(QCloseEvent *event) { for(int i=0;i<threadNum;i++) { thread[i].threadStop(); if(thread[i].isRunning()) { thread[i].threadStop(); thread[i].wait(); } } event->accept(); }