mainwindow.cpp

基于qt的串口多线程编程

#include <qlabel.h>     
#include <qpushbutton.h>  
#include <qvbox.h> 
#include <qapplication.h>
#include <qlineedit.h>
#include <qpixmap.h>
#include <qpainter.h>
#include <qimage.h>
#include <qstring.h>
 
 
#include "mainwindow.h"   
#include "serialthread.h"    
 
void MainWindow::paintEvent( QPaintEvent * )
{
    QPainter paint( this );
    paint.drawLine( 0,0,500,500 ); // draw line
        paint.drawPixmap(0,0,*pix);
        }
 
void MainWindow::loadJPEGFile(){
     
     if(!pix->load("/root/serial/bin/1.JPG")){
     //if(!pix->load("circle")){
         setMsgText("Load failed");
        return;
     }
    setMsgText("Load success!");
    update();
         
}
 
void MainWindow::setCounter(int no){
    counter = no;
}
 
void MainWindow::serialOperate(){
  a = new SerialThread(this);
    a->start();
    a->wait();
}
 
MainWindow::MainWindow(QWidget * parent , const char * name)
    :QMainWindow(parent, name)
{
     
        counter = 0;
         
        QVBox *vbox;
        vbox = new QVBox(this);
        vbox->resize(300,150);
        //msg = new QLabel("SERIAL PROGRAMMING",vbox);
        msg = new QLineEdit("SERIAL PROGRAMMING",vbox);
        msg->resize(300,50);
         
        pix = new    QPixmap();              
         
        btn = new QPushButton(vbox);
        btn->setText("GO!");
        QApplication::connect(btn,SIGNAL(clicked()),this,SLOT(serialOperate()));
        btn2LoadImg = new QPushButton(vbox);
        btn2LoadImg->setText("LOAD");
         
        lab = new QLabel("before load jpeg",vbox);
        QApplication::connect(btn2LoadImg,SIGNAL(clicked()),this,SLOT(loadJPEGFile()));
         
        //btn->resize(100,75);
        //vbox->show();
};
 
void MainWindow::setMsgText(char* txt){
        QString msgs(txt);
        QString count = QString::number(counter,10);
        msgs.append(count);
        const     char *re = msgs.ascii ();          
        //strcat(msgs,);
        msg->setText(re);     
};