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QTableWidget(在我的代码中,ipTable)Item来自test_data.txt。 但test_data.txt文件每3秒钟更改一次。 我想自动刷新表格。自动刷新QTableWidget可能吗?
如何自动更新QTableWidget ..?
这是我的代码。
#include "dialog.h"
#include "ui_dialog.h"
#include "addip.h"
#include <QFile>
Dialog::Dialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::Dialog)
{
ui->setupUi(this);
timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(onTimer()));
timer->start(1000);
setWindowTitle("IP List");
ui->ipTable->setColumnCount(3);
refresh_table();
}
Dialog::~Dialog()
{
delete ui;
}
QStringList Dialog::refresh_table()
{
int field;
QFile file("/home/yein/widget/test_data.txt");
QStringList title;
title << "IP" << "Protocol" << "state";
file.open(QIODevice::ReadOnly);
QTextStream read(&file);
ui->ipTable->clear();
ui->ipTable->setRowCount(0);
ui->ipTable->setHorizontalHeaderLabels(title);
while(!read.atEnd())
{
QString tmp = read.readLine();
QStringList tmpList = tmp.split(",");
ui->ipTable->insertRow(ui->ipTable->rowCount());
field = ui->ipTable->rowCount() - 1;
ui->ipTable->setItem(field, IP, new QTableWidgetItem(tmpList[0]));
ui->ipTable->setItem(field, PROTOCOL, new QTableWidgetItem(tmpList[1]));
ui->ipTable->setItem(field, STATE, new QTableWidgetItem(tmpList[2]));
}
file.close();
return table;
}
void Dialog::on_btnAdd_clicked()
{
QString protocol;
QString IP;
int res;
addIP add(this);
add.setWindowTitle("Add IP");
res = add.exec();
if(res == QDialog::Rejected)
return;
IP = add.getIP();
protocol = add.getProtocol();
qDebug() << "IP :" << " " << IP;
qDebug() << "Protocol : " << " " << protocol;
write_on_file(IP,protocol);
}
void Dialog::write_on_file(QString IP, QString protocol)
{
QFile file("/home/yein/widget/test_data.txt");
file.open(QIODevice::Append);
data[0] = IP;
data[1] = protocol;
data[2] = "0"; // init state 0
QString _str = QString("%1,%2,%3\n")
.arg(data[0])
.arg(data[1])
.arg(data[2]);
qDebug() << _str << " ";
QByteArray str;
str.append(_str);
file.write(str);
file.close();
refresh_table();
}
void Dialog::on_btnClose_clicked()
{
this->close();
}
void Dialog::onTimer()
{
updateRStatusBar();
}
void Dialog::updateRStatusBar()
{
QDateTime local(QDateTime::currentDateTime());
ui->clock->setText(local.toString());
}
谢谢你的回答! –
我在Dialog :: Dialog(QWidget * parent)中添加了这段代码: 它可以工作,但工作一次..我做错了吗? 'watcher = new QFileSystemWatcher(this); (观察者,SIGNAL(fileChanged(const QString&)),this,SLOT(refresh_table())); watcher-> addPath(“/ home/yein/widget/test_data.txt”);' –
它只能用于第一次?你的代码对我来说看起来相当不错。你在更改文件吗?或者你删除它并在某处重新创建它? – Paraboloid87