QT5---QTableWidget简单应用之文件浏览器

  实现下面这个简单的文件浏览功能，常用的QTableWidget设置都用到了。

基本设置

    ui->tableWidget->setColumnCount(5);                               //设置表格列数
    ui->tableWidget->horizontalHeader()->setStretchLastSection(true); //设置表格是否充满，即行位不留空
    ui->tableWidget->setSelectionBehavior(QAbstractItemView::SelectRows);//设置鼠标选择行为：一个单元格/一行/一列
    ui->tableWidget->horizontalHeader()->setFixedHeight(35);          //设置表头高度

    /*设置表头单元格内容*/
    QStringList header;
    header<<tr("File Name")<<tr("Size")<<tr("Double Click to Decode") << "Double Click to Close"<< tr("Decode Process");
    ui->tableWidget->setHorizontalHeaderLabels(header);
    /*设置表头字体加粗*/
    QFont font = ui->tableWidget->horizontalHeader()->font();
    font.setBold(true);
    ui->tableWidget->horizontalHeader()->setFont(font);
    ui->tableWidget->setFrameShape(QFrame::NoFrame);                  //设置无边框
    ui->tableWidget->verticalHeader()->hide();                        //设置垂直的头部隐藏，不隐藏默认会显示列表数字
    ui->tableWidget->horizontalHeader()->resizeSection(0,150);        //设置第0列的宽度为150px
    ui->tableWidget->setItemDelegate(new NoFocusDelegate());          //设置鼠标行时，不显示单元格虚框，NoFocusDelegate类实现如附录
    ui->tableWidget->setMouseTracking(true);                          //设置鼠标捕捉，不设置，如鼠标进入等动作检测不到
    ui->tableWidget->setStyleSheet("selection-background-color:lightblue;");//设置行选中时背景颜色
    ui->tableWidget->horizontalHeader()->setStyleSheet("QHeaderView::section{background:greenyellow;}");//表头背景颜色
    /*信号槽，单元格双击*/
    connect(ui->tableWidget, SIGNAL(cellDoubleClicked(int,int)),
            this, SLOT(sdlog2Decode(int,int)));
    /*信号槽，鼠标进入单元格*/
    connect(ui->tableWidget,SIGNAL(itemEntered(QTableWidgetItem*)),
            this,SLOT(itemEnteredHover(QTableWidgetItem *)));

    /*添加构件到单元格，如按钮，进度条等*/
    QProgressBar *pgbar = new QProgressBar(ui->tableWidget);
    pgbar->setTextVisible(false);       
    ui->tableWidget->setCellWidget(row,column,pgbar);                      //替换当前widget

    /*设置单元格背景颜色*/
    QTableWidgetItem *itemtemp = ui->tableWidget->item(row, col);     
    itemtemp->setBackgroundColor(QColor(255,255,255,255));

    ui->tableWidget->removeCellWidget(row,col);                            //移除单元格中的构件
    ui->tableWidget->removeRow(row);                                       //移除表格某一行
    int col = ui->tableWidget->columnCount();                              //获取表格列数
    int row = ui->tableWidget->rowCount();                                 //获取行数

    /*插入第row行，以两列为例*/
    ui->tableWidget->insertRow(row);
    QTableWidgetItem *Item1 = new QTableWidgetItem("hello1");
    Item1->setTextAlignment(Qt::AlignCenter | Qt::AlignVCenter);
    Item1->setFlags(Item1->flags() ^ Qt::ItemIsEditable);
    QTableWidgetItem *Item2 = new QTableWidgetItem("hello2");              //设置单元格内容
    Item2->setTextAlignment(Qt::AlignCenter | Qt::AlignVCenter);           //设置单元格内容对其方式
    Item2->setFlags(Item2->flags() ^ Qt::ItemIsEditable);                  //设置单元格是否可编辑
    ui->tableWidget->setItem(row, 0, Item1);
    ui->tableWidget->setItem(row, 1, Item2);

    /*设置各种文件icon*/
    QFileInfo info;
    QFile file(currentDir.absoluteFilePath(filesname));
    info = QFileInfo(filesname);
    qint64 size = info.size();
    QFileIconProvider icon_provider;
    QIcon icon = icon_provider.icon(info);
    QTableWidgetItem *fileNameItem = new QTableWidgetItem(info.filePath());
    fileNameItem->setIcon(icon);
    fileNameItem->setTextAlignment(Qt::AlignCenter | Qt::AlignVCenter);
    fileNameItem->setFlags(fileNameItem->flags() ^ Qt::ItemIsEditable);

附录程序

NoFocusDelegate.h

#ifndef NoFocusDelegate_H
#define NoFocusDelegate_H
#include <QPainter>
#include <QStyledItemDelegate>
class NoFocusDelegate :public QStyledItemDelegate
{
public:
    NoFocusDelegate();
    ~NoFocusDelegate();
protected:
     void paint(QPainter* painter, const QStyleOptionViewItem & option, const QModelIndex &index) const;
};
#endif // SETHIGHLIGHTSECTIONS_H

NoFocusDelegate.cpp

#include "NoFocusDelegate.h"
NoFocusDelegate::NoFocusDelegate()
{
}
NoFocusDelegate::~NoFocusDelegate()
{
}
void NoFocusDelegate::paint(QPainter* painter, const QStyleOptionViewItem & option, const QModelIndex &index) const
{
   QStyleOptionViewItem itemOption(option);
   if (itemOption.state & QStyle::State_HasFocus)
   {
      itemOption.state = itemOption.state ^ QStyle::State_HasFocus;
   }
   QStyledItemDelegate::paint(painter, itemOption, index);
}