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代码实现制作QT表格

时间：2021-07-01 10:21:17 帮助过：28人阅读

本文主要为大家分享一篇代码实现制作QT表格的请求方法，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过来看看吧，希望能帮助到大家。

一、简介

QTableWidget是QT对话框设计中常用的显示数据表格的控件，QTableWidget单元格数据是QTableWidgetItem对象来实现的，整个表格都需要用逐个单元格对象QTableWidgetItem构建起来。


二、详解

1、代码

（1）table.h

  1. #ifndef TABLE_H  
#define TABLE_H  
#include <QtGui>  
  
class Table : public QTableWidget  
{  
    Q_OBJECT  
public:  
    Table(QWidget *parent = 0);  
    ~Table();  
    void setColumnValue(const int &columnSum, const QStringList &header);   //set header value  
    void setHeaderWidth(const int &index, const int &width);    //set header and column widhth for each index  
    void setHeaderHeight(const int &height);                    //set header height  
  
    void addRowValue(const int &height, const QStringList &value, const QIcon &fileIcon);  
    void setRowH(const int &index, const int &height);  
    void setItemFixed(bool flag);  
    bool getSelectedRow(QList<int> &rowList);  
      
protected:  
    void contextMenuEvent(QContextMenuEvent *event);  
    QModelIndex moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers);  
    void keyPressEvent(QKeyEvent *event);  
  
private:  
    void createActions();  
      
private slots:  
    void slotItemEntered(QTableWidgetItem *item);  
    void slotActionRename();  
    void slotItemSelectionChanged();  
      
private:  
    int tableWidth;  
    int tableHeight;  
    QList<int>rowHeghtList;  
    QList<int>rowWidthList;  
      
    QMenu *popMenu;  
    QAction *actionName;  
    QAction *actionSize;  
    QAction *actionType;  
    QAction *actionDate;  
    QAction *actionOpen;  
    QAction *actionDownload;  
    QAction *actionFlush;  
    QAction *actionDelete;  
    QAction *actionRename;  
    QAction *actionCreateFolder;  
    QTableWidgetItem *rightClickedItem;  
    QMap<QTableWidgetItem *, QString>fileMap;  
    bool dupFlag;  
};  
  
// custom item delegate class  
class NoFocusDelegate : public QStyledItemDelegate  
{  
protected:  
    void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const;  
};  
#endif // TABLE_H

（2）table.cpp


  1. #include "table.h"  
  
Table::Table(QWidget *parent)  
    : QTableWidget(parent)  
    , rightClickedItem(NULL)  
    , dupFlag(false)  
{  
    rowHeghtList.clear();  
    rowWidthList.clear();  
    fileMap.clear();  
    this->setMouseTracking(true);  
    //setWindowTitle(tr("table"));  
    horizontalHeader()->setDefaultSectionSize(100);  
    verticalHeader()->setDefaultSectionSize(30);    //设置默认行高  
    tableWidth = 100;  
    tableHeight = 30;  
    horizontalHeader()->setClickable(false);    //设置表头不可点击（默认点击后进行排序  
  
    QFont font = horizontalHeader()->font();    //设置表头字体加粗  
    font.setBold(true);  
    horizontalHeader()->setFont(font);  
    horizontalHeader()->setStretchLastSection(true);    //设置充满表宽度  
    horizontalHeader()->setMovable(false);              //表头左右互换  
    //verticalHeader()->setResizeMode(QHeaderView::ResizeToContents);  
  
    setFrameShape(QFrame::NoFrame);      //设置无边框  
    //setShowGrid(false);                //设置不显示格子线  
    verticalHeader()->setVisible(false); //设置垂直头不可见  
    setSelectionMode(QAbstractItemView::ExtendedSelection);  //可多选（Ctrl、Shift、  Ctrl+A都可以）  
    setSelectionBehavior(QAbstractItemView::SelectRows);  //设置选择行为时每次选择一行  
    setEditTriggers(QAbstractItemView::NoEditTriggers); //设置不可编辑  
  
    setStyleSheet("selection-background-color:lightblue;");  //设置选中背景色  
    //horizontalHeader()->setStyleSheet("QHeaderView::section{background:skyblue;}"); //设置表头背景色  
    //setStyleSheet("background: rgb(56,56,56);alternate-background-color:rgb(48,51,55);selection-background-color:qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 rgb(56,56,56),stop:1 rgb(76,76,76));"); //设置选中背景色  
    horizontalHeader()->setStyleSheet("QHeaderView::section{background-color: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 rgba(134, 245, 99, 255),stop:0.5 rgba(134, 148, 99, 255),stop:1 rgba(115, 87, 128, 255));color:rgb(25, 70, 100);padding-left: 1px;border: 1px solid #FFFF00;}"); //设置表头背景色  
    setAlternatingRowColors(true);  
  
    //setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);  
    //setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);  
    //设置水平、垂直滚动条样式  
    horizontalScrollBar()->setStyleSheet("QScrollBar{background:transparent; height:12px;}"  
                                         "QScrollBar::handle{background:lightgray; border:2px solid transparent; border-radius:5px;}"  
                                         "QScrollBar::handle:hover{background:gray;}"  
                                         "QScrollBar::sub-line{background:transparent;}"  
                                         "QScrollBar::add-line{background:transparent;}");  
  
    verticalScrollBar()->setStyleSheet("QScrollBar{background:transparent; width:12px;}"  
                                       "QScrollBar::handle{background:lightgray; border:2px solid transparent; border-radius:5px;}"  
                                       "QScrollBar::handle:hover{background:gray;}"  
                                       "QScrollBar::sub-line{background:transparent;}"  
                                       "QScrollBar::add-line{background:transparent;}");  
  
    // set the item delegate to your table widget  
    setItemDelegate(new NoFocusDelegate());             //虚线边框去除  
    //setFocusPolicy(Qt::NoFocus);   //去除选中虚线框  
    horizontalHeader()->setHighlightSections(false);    //点击表时不对表头行光亮（获取焦点）  
  
    createActions();  
    setItemFixed(false);  
    connect(this, SIGNAL(itemEntered(QTableWidgetItem*)), this , SLOT(slotItemEntered(QTableWidgetItem*)));  
    connect(this, SIGNAL(itemSelectionChanged()), this , SLOT(slotItemSelectionChanged()));  
    //this->resize(600, 600);  
}  
  
Table::~Table()  
{  
  
}  
  
void Table::setColumnValue(const int &columnSum, const QStringList &header)  
{  
    setColumnCount(columnSum);                //设置列数  
    this->setHorizontalHeaderLabels(header);  //设置列的标签  
}  
  
void Table::setHeaderWidth(const int &index, const int &width)  
{  
    horizontalHeader()->resizeSection(index,width);  
    if (rowWidthList.count() <= index + 1) {  
      rowWidthList.append(width);  
    }  
    else {  
      rowWidthList[index+1] = width;  
    }  
    tableWidth = 0;  
    for(int index = 0; index < rowWidthList.count(); index++)  
       tableWidth += rowWidthList.at(index);  
    resize(tableWidth, tableHeight);  
}  
  
void Table::setHeaderHeight(const int &height)  
{  
    horizontalHeader()->setFixedHeight(height);        //设置表头的高度  
    if (rowHeghtList.isEmpty()) {  
      rowHeghtList.append(height);  
    }  
    else {  
      rowHeghtList[0] = height;  
    }  
    tableHeight = 0;  
    for(int index = 0; index < rowHeghtList.count(); index++)  
       tableHeight += rowHeghtList.at(index);  
    resize(tableWidth, tableHeight);  
}  
  
void Table::addRowValue(const int &height, const QStringList &value, const QIcon &fileIcon)  
{  
    int row_count = rowCount();    //获取表单行数  
    insertRow(row_count);          //插入新行  
    setRowHeight(row_count, height);  
    for (int index = 0; index < columnCount(); index++) {  
        QTableWidgetItem *item = new QTableWidgetItem;  
        if (index == 0) {  
            item->setIcon(fileIcon);  
            item->setTextAlignment(Qt::AlignVCenter | Qt::AlignLeft);  
            fileMap.insert(item, value.at(index));  
        }  
        else {  
            item->setTextAlignment(Qt::AlignCenter);  
        }  
        item->setText(value.at(index));  
        setItem(row_count, index, item);  
    }  
    rowHeghtList.append(height);  
    tableHeight += height;   
    resize(tableWidth, tableHeight);  
}  
  
  
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);  
}  
  
void Table::setRowH(const int &index, const int &height)  
{  
  setRowHeight(index, height);  
  if (rowHeghtList.count() <= index + 1) {  
    rowHeghtList.append(height);  
  }  
  else {  
    rowHeghtList[index+1] = height;  
  }  
  tableHeight = 0;  
  for(int index = 0; index < rowHeghtList.count(); index++)  
     tableHeight += rowHeghtList.at(index);  
  resize(tableWidth, tableHeight);  
}  
  
void Table::createActions()  
{  
  popMenu = new QMenu();  
  actionName = new QAction(this);  
  actionSize = new QAction(this);  
  actionType = new QAction(this);  
  actionDate = new QAction(this);  
  actionOpen = new QAction(this);     
  actionDownload = new QAction(this);  
  actionFlush = new QAction(this);  
  actionDelete = new QAction(this);  
  actionRename = new QAction(this);  
  actionCreateFolder = new QAction(this);  
     
  actionOpen->setText(tr("打开"));  
  actionDownload->setText(tr("下载"));  
  actionFlush->setText(tr("刷新"));  
  actionDelete->setText(tr("删除"));  
  actionRename->setText(tr("重命名"));  
  actionCreateFolder->setText(tr("新建文件夹"));  
  actionName->setText(tr("名称"));  
  actionSize->setText(tr("大小"));  
  actionType->setText(tr("项目类型"));  
  actionDate->setText(tr("修改日期"));  
       
  actionFlush->setShortcut(QKeySequence::Refresh);  
  connect(actionRename, SIGNAL(triggered()), this, SLOT(slotActionRename()));  
}  
  
void Table::contextMenuEvent(QContextMenuEvent *event)  
{  
  popMenu->clear();  
  QPoint point = event->pos();  
  rightClickedItem = this->itemAt(point);  
  if(rightClickedItem != NULL) {  
    popMenu->addAction(actionDownload);  
    popMenu->addAction(actionFlush);  
    popMenu->addSeparator();  
    popMenu->addAction(actionDelete);  
    popMenu->addAction(actionRename);  
    popMenu->addSeparator();  
    popMenu->addAction(actionCreateFolder);  
    QMenu *sortStyle = popMenu->addMenu(tr("排序"));  
    sortStyle->addAction(actionName);  
    sortStyle->addAction(actionSize);  
    sortStyle->addAction(actionType);  
    sortStyle->addAction(actionDate);  
          
    popMenu->exec(QCursor::pos());  
    event->accept();  
  }  
}  
  
QModelIndex Table::moveCursor(QAbstractItemView::CursorAction cursorAction, Qt::KeyboardModifiers modifiers)  
{  
    //重写移动光标事件，当存在编辑项的时候，让光标永远位于当前项（编辑项）,否则返回父类  
    if(rightClickedItem && rightClickedItem->row() >= 0) {  
        return currentIndex();  
    }  
    else {  
       return QTableWidget::moveCursor(cursorAction, modifiers);  
    }  
}  
  
  
void Table::keyPressEvent(QKeyEvent *event)  
{  
    if (event->key() == Qt::Key_Return || event->key() == Qt::Key_Enter) {  
        QTableWidgetItem *item = currentItem();  
        if (item) {  
            closePersistentEditor(item);  
            openPersistentEditor(item);  
            slotItemSelectionChanged();  
            dupFlag = false;  
        }  
    }  
}  
  
void Table::slotItemSelectionChanged()  
{  
    //关闭编辑项  
    if (rightClickedItem && dupFlag == false) {  
        int editRow = rightClickedItem->row();  
        QTableWidgetItem *item = this->item(editRow, 0);  
        QMap<QTableWidgetItem *, QString>::iterator it;  
        for (it = fileMap.begin(); it != fileMap.end(); ++it) {  
            if (it.key() != item) {  
                if (it.value() == item->text()) {  
                    dupFlag = true;  
                }  
            }  
        }  
        if (dupFlag == false) {  
            this->closePersistentEditor(item);  
            rightClickedItem = NULL;  
        }  
        else {  
            QMessageBox::critical(this,tr("错误提示"),tr("文件重名"), tr("确定"));  
            setCurrentItem(item);  
        }  
    }  
    else {  
        dupFlag = false;  
    }  
}  
  
void Table::setItemFixed(bool flag)  
{  
  if (flag == true)  
      horizontalHeader()->setResizeMode(QHeaderView::Fixed);  
  else  
      horizontalHeader()->setResizeMode(QHeaderView::Interactive);  
}  
  
bool Table::getSelectedRow(QList<int> &rowList)  
{  
    //多选并获取所选行  
    QList<QTableWidgetItem *> items = this->selectedItems();  
    int itemCount = items.count();  
    if(itemCount <= 0) {  
        return false;  
    }  
    for (int index = 0; index < itemCount; index++) {  
        int itemRow = this->row(items.at(index));  
        rowList.append(itemRow);  
    }  
    return  true;  
}  
  
void Table::slotItemEntered(QTableWidgetItem *item)  
{  
  if(!item)  
    return;  
  QString name = item->text();  
  if (name.isEmpty())  
    return;  
  QToolTip::showText(QCursor::pos(), name);  
}  
  
void Table::slotActionRename()  
{  
    //获得当前节点并获取编辑名称  
    if (rightClickedItem) {  
        int editRow = rightClickedItem->row();  
        QTableWidgetItem *item = this->item(editRow, 0);   //编辑的行号及第一列  
        this->setCurrentCell(editRow, 0);  
        this->openPersistentEditor(item);                  //打开编辑项  
        this->editItem(item);  
    }  
}

（3）tablewidget.h

  1. #ifndef TABLEWIDGET_H  
#define TABLEWIDGET_H  
#include "table.h"  
  
class TableWidget : public QWidget  
{  
    Q_OBJECT  
  
public:  
    TableWidget(QWidget *parent = 0);  
    ~TableWidget();  
  
private:  
    bool ScanFile(const QString & path);  
  
private:  
    Table *table;  
};  
  
#endif // TABLEWIDGET_H

（4）tablewidget.cpp


  1. #include "tablewidget.h"  
  
TableWidget::TableWidget(QWidget *parent)  
    : QWidget(parent)  
{  
    QTextCodec*codec = QTextCodec::codecForName("utf8");  
    QTextCodec::setCodecForLocale(codec);  
    QTextCodec::setCodecForCStrings(codec);  
    QTextCodec::setCodecForTr(codec);  
    setWindowTitle(tr("文件浏览"));  
    table = new Table(this);  
  
    QStringList header;  
    header<<tr("文件名")<<tr("最后更改日期")<<tr("类型")<<tr("大小");  
    table->setColumnValue(4, header);  
  
    table->setHeaderWidth(0, 200);  
    table->setHeaderWidth(1, 150);  
    table->setHeaderWidth(2, 100);  
    table->setHeaderWidth(3, 100);  
    table->setHeaderHeight(30);  
    //table->setRowH(0, 200);  
    ScanFile(QApplication::applicationDirPath());  
//    table->setRowHeight(46);  
    resize(800, 800);  
}  
  
TableWidget::~TableWidget()  
{  
  
}  
  
//Qt实现遍历文件夹和文件目录  
bool TableWidget::ScanFile(const QString &path)  
{  
    QDir dir(path);  
    if (!dir.exists())  
        return false;  
//    dir.setFilter(QDir::Dirs | QDir::Files | QDir::NoSymLinks | QDir::NoDotAndDotDot);  
//    QFileInfoList list = dir.entryInfoList();  
//    //QStringList list = dir.entryList();  
//    for(int index = 0; index < list.count(); index++) {  
//        QFileInfo fileInfo = list.at(index);  
//        if (fileInfo.isDir()) {  
//            ScanFile(fileInfo.filePath());  
//        }  
//        else {  
//            qDebug() << "----------" << fileInfo.absoluteFilePath();  
//        }  
//    }  
    QDirIterator dirIterator(path, QDir::Dirs | QDir::Files | QDir::NoSymLinks| QDir::NoDotAndDotDot, QDirIterator::Subdirectories);  
    while(dirIterator.hasNext()) {  
        dirIterator.next();  
        QFileInfo fileInfo = dirIterator.fileInfo();  
        QString filePath = fileInfo.absoluteFilePath();  
        QFileIconProvider iconProvider;  
        QIcon icon;  
        if (fileInfo.isDir()) {          //获取指定文件图标  
            icon = iconProvider.icon(QFileIconProvider::Folder);  
        }  
        else {  
            icon = iconProvider.icon(fileInfo);  
        }  
        QFileIconProvider icon_provider;  
        QString typeFile = icon_provider.type(fileInfo);  
        table->addRowValue(30, QStringList()<< filePath <<fileInfo.lastModified().toString("yyyy-MM-dd hh:mm:ss")  
                                            <<typeFile<<QString::number(fileInfo.size()/1024.0, 'f', 2)+"KB", icon);  
    }  
    return true;  
  
}

（5）main.cpp

  1. #include "tablewidget.h"  
#include <QApplication>  
  
int main(int argc, char *argv[])  
{  
    QApplication a(argc, argv);  
    TableWidget w;  
    w.show();  
  
    return a.exec();  
}


（6）运行结果


（7）总结
根据网上博客修改了：鼠标点击的选项会出现虚框、创建右键菜单、获取文件图标类型、右键编辑时Tab键的处理和重命名文件重名后表格更新的、递归扫描文件夹。

2、QTableWidget控件属性

一、禁止编辑表格
在默认情况下，表格里的字符是可以更改的。
比如双击一个单元格，就可以修改原来的内容，如果想禁止用户的这种操作，让这个表格对用户只读，可以这样：

  1. ui.qtablewidget->setEditTriggers(QAbstractItemView::NoEditTriggers);

二、设置表格为选择整行

  1. /*设置表格为整行选中*/  
ui.qtablewidget->setSelectionBehavior(QAbstractItemView::SelectRows);

三、设置单个选中和多个选中
单个选中意味着每次只可以选中一个单元格，多个就是相当于可以选择”一片“那种模式。

  1. /*设置允许多个选中*/   
ui.qtablewidget->setSelectionMode(QAbstractItemView::ExtendedSelection);

四、表格表头的显示与隐藏
对于水平或垂直方向的表头，如果不想显示可以用以下方式进行（隐藏/显示）设置：

  1. ui.qtablewidget->verticalHeader()->setVisible(true);    
ui.qtablewidget->horizontalHeader()->setVisible(false);

五、设置具体单元格中字体的对齐方式

  1. ui.qtablewidget->item(0, 0)->setTextAlignment(Qt::AlignHCenter);

六、设置具体单元格中字体格式

  1. ui.qtablewidget->item(1, 0)->setBackgroundColor(QColor(0,60,10));     
ui.qtablewidget->item(1, 0)->setTextColor(QColor(200,111,100));  
ui.qtablewidget->item(1, 0)->setFont(QFont("Helvetica"));

七、设置具体单元格的值

  1. ui.qtablewidget->setItem(1, 0, new QTableWidgetItem(str));

八、把QTableWidgetItem对象内容转换为QString

  1. QString str =ui.qtablewidget->item(0, 0)->data(Qt::DisplayRole).toString();

九、具体单元格中添加控件

  1. QComboBox *comBox = new QComboBox();  
comBox->addItem("F");  
comBox->addItem("M");  
ui.qtablewidget->setCellWidget(0,3,comBox);

十、合并单元格

  1. //合并单元格的效果  
ui.qtablewidget->setSpan(2, 2, 3, 2);  
//第一个参数：要改变的单元格行数  
//第二个参数：要改变的单元格列数  
//第三个参数：需要合并的行数  
//第四个参数：需要合并的列数

十一、具体单元格中插入图片

  1. ui.qtablewidget->setItem(3, 2, new QTableWidgetItem(QIcon("images/music.png"), "Music"));

十二、设置显示网格

  1. ui.qtablewidget->setShowGrid(true);//显示表格线

十三、设置滚动条

  1. ui.qtablewidget->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);//去掉水平滚动条

十四、设置列标签

  1. //初始化界面  
    QStringList  HStrList;  
    HStrList.push_back(QString("name"));  
    HStrList.push_back(QString("id"));  
    HStrList.push_back(QString("age"));  
    HStrList.push_back(QString("sex"));  
    HStrList.push_back(QString("department"));  
      
  
    //设置行列数(只有列存在的前提下，才可以设置列标签)  
    int HlableCnt = HStrList.count();  
    ui.qtablewidget->setRowCount(10);  
    ui.qtablewidget->setColumnCount(HlableCnt);  
  
    //设置列标签  
    ui.qtablewidget->setHorizontalHeaderLabels(HStrList);

十五、设置行和列的大小设为与内容相匹配

  1. ui.qtablewidget->resizeColumnsToContents();    
ui.qtablewidget->resizeRowsToContents();

十六、设置字体

  1. ui.qtablewidget->setFont(font);   //设置字体

十七、获取某一单元格的内容

  1. QString strText = ui.qtablewidget->item(0, 0)->text();

3、QTableWidget美化

QSS样式表（根据需求修改颜色）：

  1. QTableWidget  
{  
background: rgb(56,56,56);  
alternate-background-color:rgb(48,51,55);  
selection-background-color:qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 rgb(56,56,56),stop:1 rgb(66,66,66));  
}


  1. QHeaderView::section  
{  
background-color: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 rgb(46,46,46),stop:1 rgb(56,56,56));  
color: rgb(210,210,210);  
padding-left: 4px;border: 1px solid #383838;  
}


  1. QScrollBar:vertical  
{  
border: 0px solid grey;  
background: transparent;  
width: 15px;  
margin: 22px 0 22px 0;  
}  
QScrollBar::handle:vertical  
{  
background: qlineargradient(x1:0, y1:0, x2:1, y2:0, stop:0 rgb(46,46,46),stop:1 rgb(66,66,66));  
min-height: 20px;  
}  
QScrollBar::add-line:vertical  
{  
border: 0px solid grey;  
background: rgb(66,66,66);  
height: 20px;  
subcontrol-position: bottom;  
subcontrol-origin: margin;  
}  
QScrollBar::sub-line:vertical  
{  
border: 0px solid grey;  
background: rgb(56,56,56);  
height: 20px;  
subcontrol-position: top;  
subcontrol-origin: margin;  
}  
QScrollBar::up-arrow:vertical, QScrollBar::down-arrow:vertical  
{  
border: 0px solid grey;  
width: 3px;  
height: 3px;  
background: rgb(46,46,46);  
}  
QScrollBar::add-page:vertical, QScrollBar::sub-page:vertical  
{  
background: none;  
}

四、总结

（1）源码中绝大部分的功能都没实现，Table也没进行完整的封装，可根据自己的需求修改代码。
（2）本代码的总结参考了网友的博客，在此感谢。

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