QT5---QTableWidget简单应用之文件浏览器

来源：互联网发布：桨战船知乎编辑：程序博客网时间：2024/06/06 01:25

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。
这里写图片描述

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);}

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