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代码实现制作QT表格

零到壹度
零到壹度asal
2018-03-30 13:30:155846semak imbas

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, &#39;f&#39;, 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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