QTableView 添加QCheckbox 并实现全选和批量删除

最新推荐文章于 2025-03-24 11:27:42 发布

司马香炉

最新推荐文章于 2025-03-24 11:27:42 发布

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分类专栏： Qt

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QTableView 添加QCheckbox
本文主要功能是：在QTableview 中添加QCheckBox ，并能实现大小自适应，全选按钮的变化（点击全选，可以使 QtableView 中的所有的 Qcheckbox 都选择，任何一个子QCheckBox 变化都会影响全选按钮），以及批量删除的功能，代码不是很优化！！！

上代码
NatiavIsolationDilog .h

#ifndef NATIAVISOLATIONDILOG_H
#define NATIAVISOLATIONDILOG_H

#include <QWidget>
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QLabel>
#include <QTableView>
#include <QCheckBox>
#include <QPushButton>
#include <QStandardItem>
#include <QStandardItemModel>

//隔离弹窗
class NatiavIsolationDilog : public QWidget
{
    Q_OBJECT
public:
    explicit NatiavIsolationDilog(QWidget *parent = nullptr);

    void initGUI();   //界面初始化
    QHBoxLayout *initTableWidget();   //初始化中间tableview布局
    void loadData();//加载数据

protected:
    void resizeEvent(QResizeEvent *event);
signals:

public slots:
    void slot_checkAll(int status);  //全选
    void slot_delteTrust();  //移除信任
    void slot_tCheckItem();   //table表的单选

private:
    QCheckBox *m_checkBoxAll;     //全选框
    QPushButton  *m_pBLog;      //移除隔离按钮
    QStandardItemModel *m_itemmodel;
    QTableView *m_tableView;
};

#endif // NATIAVISOLATIONDILOG_H

NatiavIsolationDilog .cpp

#include "natiavisolationdilog.h"

#include <QDebug>
#include <QTime>
#include <QHeaderView>

NatiavIsolationDilog::NatiavIsolationDilog(QWidget *parent)
    : QWidget(parent)
{
    this->resize(520, 520);
    this->setMinimumSize(QSize(520, 520));
    this->setMaximumSize(QSize(520, 520));

    m_checkBoxAll = new QCheckBox(this);    //全选
    m_pBLog = new QPushButton(this);   //按钮
    m_itemmodel = new  QStandardItemModel;
    initGUI(); //界面初始化

    //全选开启三态
    m_checkBoxAll->setCheckState(Qt::CheckState::PartiallyChecked);
    m_checkBoxAll->setCheckState(Qt::CheckState::Unchecked);  //设置全选初始
    connect(m_checkBoxAll, &QCheckBox::stateChanged, this, &NatiavIsolationDilog::slot_checkAll);
    connect(m_pBLog, &QPushButton::clicked, this, &NatiavIsolationDilog::slot_delteTrust);

    loadData();  //加载数据
}

void NatiavIsolationDilog::initGUI()
{
    QVBoxLayout *mainlayout=new  QVBoxLayout(this);   //主布局
    mainlayout->setContentsMargins(20,0,20,0);      //边距离
    QLabel *label_title = new QLabel(tr("隔离区"));   //标题
    label_title->setAlignment(Qt::AlignCenter);
    mainlayout->addWidget(label_title);

    //tableview
    QWidget *CenterWidget = new QWidget;
    CenterWidget->setFixedHeight(400);
    CenterWidget->setMinimumWidth(473);
    CenterWidget->setLayout(initTableWidget());
    mainlayout->addWidget(CenterWidget,Qt::AlignBottom | Qt::AlignHCenter);

    //全选框
    m_checkBoxAll->setText(tr("全选"));
    mainlayout->addWidget(m_checkBoxAll);

    // 按钮
    QWidget *horizontalWidget = new QWidget;
    QHBoxLayout  *horizontalLayout = new QHBoxLayout();
    QSpacerItem *horizontalSpacer_2 = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
    horizontalLayout->addItem(horizontalSpacer_2);
    m_pBLog->setText(tr("删除隔离"));
    m_pBLog->setMinimumSize(QSize(140, 36));
    m_pBLog->setMaximumSize(QSize(140, 37));
    horizontalLayout->addWidget(m_pBLog);
    QSpacerItem   *horizontalSpacer = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
    horizontalLayout->addItem(horizontalSpacer);
    horizontalWidget->setLayout(horizontalLayout);
    mainlayout->addWidget(horizontalWidget);
}


 //初始化中间tableview布局
QHBoxLayout *NatiavIsolationDilog::initTableWidget()
{
    QHBoxLayout *layout = new QHBoxLayout;
    layout->setMargin(0);
    layout->setSpacing(0);

    //行高   列头去掉
    m_tableView = new QTableView;
    m_tableView->setSelectionBehavior(QAbstractItemView::SelectRows);
    m_tableView->setSelectionMode(QAbstractItemView::NoSelection);  //单选
    m_tableView->setEditTriggers(QAbstractItemView::NoEditTriggers);   //不可以编辑
    m_tableView->setFrameShape(QTableView::NoFrame);   //形状
    m_tableView->setShowGrid(false);   //栅格
    m_tableView->setSortingEnabled(true);   //排序
    m_itemmodel->clear();
    m_tableView->verticalHeader()->setVisible(false);
    m_tableView->verticalHeader()->setDefaultSectionSize(60);

    // 连接表格与模型
    m_tableView->setModel(m_itemmodel);

    //item项
    QStandardItem *standaritem0 = new QStandardItem(tr("隔离文件"));
    standaritem0->setTextAlignment(Qt::AlignLeft | Qt::AlignVCenter);
    QStandardItem *standaritem1 = new QStandardItem(tr("添加时间"));
    standaritem1->setTextAlignment(Qt::AlignLeft | Qt::AlignVCenter);

    m_itemmodel->setHorizontalHeaderItem(0, standaritem0);
    m_itemmodel->setHorizontalHeaderItem(1, standaritem1);
    m_tableView->setColumnWidth(0, 340);
    m_tableView->setColumnWidth(1, 136);

    layout->addWidget(m_tableView);
    return layout;
}

void NatiavIsolationDilog::loadData()
{
    for (int i = 0; i < 5; i++) {
        QList<QStandardItem *> itemLst;
        QStandardItem *item1 = new QStandardItem;
        QStandardItem *item2 = new QStandardItem;
        itemLst << item1 << item2;

        m_itemmodel->appendRow(itemLst);
        QWidget *pwidget= new QWidget;
        QHBoxLayout *hlayout=new QHBoxLayout;
        hlayout->setAlignment(Qt::AlignLeft);
        QVBoxLayout *vlayout=new QVBoxLayout;
        QCheckBox *chebox = new QCheckBox;
        chebox->setObjectName("singleCheck");
        hlayout->addWidget(chebox);
  //      addSpacing(10);
        QLabel *f_name = new QLabel(tr("文件名%1").arg(i));   //文件名
        QLabel *f_path = new QLabel(tr("文件路径"));   //文件名
        vlayout->addWidget(f_name);
        vlayout->addWidget(f_path);
        hlayout->addLayout(vlayout);
        pwidget->setLayout(hlayout);

        connect(chebox, &QCheckBox::clicked, this, &NatiavIsolationDilog::slot_tCheckItem);
        m_tableView->setIndexWidget(m_itemmodel->index(i, 0), pwidget);
        m_itemmodel->setItem(i, 1, new QStandardItem(QString(tr("时间"))));
    }
}

//自适应
void NatiavIsolationDilog::resizeEvent(QResizeEvent *event)
{
    Q_UNUSED(event);
    int height = m_tableView->indexWidget(m_itemmodel->index(0, 0))->size().height();
    for (int i = 0; i < m_itemmodel->rowCount(); i++) {
        m_tableView->setRowHeight(i, height);
    }
}

//全选
void NatiavIsolationDilog::slot_checkAll(int status)
{
    int count=m_itemmodel->rowCount();
    for(int i=0;i<count;i++)
    {
        QWidget *widget= m_tableView->indexWidget(m_itemmodel->index(i,0));
        QCheckBox *check =widget->findChild<QCheckBox *>("singleCheck");
        switch (status) {
        case 0:
            check->setCheckState(Qt::CheckState::Unchecked);
            break;
        case 1:
            //check->setCheckState(Qt::CheckState::PartiallyChecked);
            break;
        case 2:
            check->setCheckState(Qt::CheckState::Checked);
            break;
        }
    }
}

//删除隔离
void NatiavIsolationDilog::slot_delteTrust()
{
    int count=m_itemmodel->rowCount();   //总行数
    QMap<int, int> rowMap;    //选中状态的map
    for(int i=0;i<count;i++){
        QWidget *widget= m_tableView->indexWidget(m_itemmodel->index(i,0));
        QCheckBox *check =widget->findChild<QCheckBox *>("singleCheck");
        int status=check->checkState();    //按钮的状态
        switch (status) {
            case 0:
            rowMap.insert(i,0);
            break;
        case 1:
            break;
        case 2:
            rowMap.insert(i,1);    //如果是选中状态移除
            break;
        }
    }
    int key;
    int value;
    QMapIterator<int, int> rowMapIterator(rowMap);
    rowMapIterator.toBack();
    while (rowMapIterator.hasPrevious())
    {
        rowMapIterator.previous();
        key = rowMapIterator.key();
        value=rowMapIterator.value();
        if(value==1){
            m_itemmodel->removeRow(key);
        }
    }
}

//table 单选对象
void NatiavIsolationDilog::slot_tCheckItem()
{
    int count=m_itemmodel->rowCount();   //总行数
    QMap<int, int> rowMap;    //选中状态的map
    for(int i=0;i<count;i++){
        QWidget *widget= m_tableView->indexWidget(m_itemmodel->index(i,0));
        QCheckBox *check =widget->findChild<QCheckBox *>("singleCheck");
        int status=check->checkState();    //按钮的状态
        switch (status) {
            case 0:
            rowMap.insert(i,0);
            break;
        case 1:
            break;
        case 2:
            rowMap.insert(i,1);    //如果是选中状态移除
            break;
        }
    }

    int tcount=0;   //打沟的数量
    int fcount=0;   //不打沟的数量
    QMapIterator<int, int> rowMapIterator(rowMap);
    rowMapIterator.toBack();
    while (rowMapIterator.hasPrevious())
    {
        int value;
        rowMapIterator.previous();
        value = rowMapIterator.value();
        if(value==0){
            fcount++;
        }else if(value==1){
            tcount++;
        }
    }

    //根据数量判断  全选状态
    if(tcount==count){
        m_checkBoxAll->setCheckState(Qt::CheckState::Checked);
    }else if (fcount==count) {
        m_checkBoxAll->setCheckState(Qt::CheckState::Unchecked);
    }else {
        m_checkBoxAll->setCheckState(Qt::CheckState::PartiallyChecked);
    }
}

man.cpp

#include <QApplication>
#include "natiavisolationdilog.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    NatiavIsolationDilog dialog;
    dialog.show();

    return a.exec();
}