目录
1.简介
2.效果图
3.重点讲解
4.源码
源码下载地址
/download/Redboy_Crazy/12289546
1.简介
本文主要介绍了如何在QTableWidget表格的单元格中添加和删除控件，内容包含动态效果图、重点讲解和源码，读者们可以方便查看学习和交流。
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2.效果图
运行效果图
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3.重点讲解
1） 通过以下语句，我们可以在指定单元格中设置我们期望的控件（如示例中的勾选框、下拉框、按钮、旋钮框等）；ui->tableWidget->setCellWidget(row, col, wdgAdd);
２）单元格中删除控件的语句如下：
ui->tableWidget->removeCellWidget(row, col);
从下面的代码片段及实际运行打印信息发现，以上remove仅仅是把控件从单元格中移除，但是并未delete释放掉，需要主动释放避免内存泄漏，大家使用中请注意该问题；
QWidget *wdgPre = ui->tableWidget->cellWidget(row, col); //之前的控件QString strMsg = tabPosInfo;if( nullptr != wdgPre ){qDebug() << "removeCellWidget at(" << row << "," << col << ")";ui->tableWidget->removeCellWidget(row, col);QString objN = wdgPre->objectName();delete wdgPre;wdgPre = nullptr;strMsg += QString("移除控件\"%1\",").arg(objN);}ui->tableWidget->setCellWidget(row, col, wdgAdd);strMsg += QString("添加控件\"%1\"").arg(txt);ui->plainTextEdit->appendPlainText(strMsg);
打印信息截图：
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4.源码
widget.hwidget.cppwidget.h
#ifndef WIDGET_H#define WIDGET_H#include <QWidget>namespace Ui {class Widget;}class Widget : public QWidget{Q_OBJECTpublic:explicit Widget(QWidget *parent = nullptr);~Widget();enum CellWidgetType {CWT_CheckBox, // 勾选框CWT_SpinBox, // 旋钮CWT_PushButton, // 按钮CWT_ComboBox, // 下拉框};private slots:void on_btnAddCellWdg_clicked();void on_tableWidget_cellClicked(int row, int column);private:void initData(); // 初始化数据void initForm(); //初始化窗体private:Ui::Widget *ui;QHash<int, QString> m_hashIdxType; // <索引, 控件名称>};#endif // WIDGET_H
widget.cpp
#include "widget.h"#include "ui_widget.h"#include <QCheckBox>#include <QPushButton>#include <QComboBox>#include <QSpinBox>#include <QDebug>Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget){ui->setupUi(this);initData();initForm();}Widget::~Widget(){delete ui;}void Widget::initData(){m_hashIdxType.insert(CWT_CheckBox, "勾选框");m_hashIdxType.insert(CWT_SpinBox, "旋钮");m_hashIdxType.insert(CWT_PushButton, "按钮");m_hashIdxType.insert(CWT_ComboBox, "下拉框");}void Widget::initForm(){{int count = 3;QString strPre("列");QStringList headerLabs;for(int i=0; i<count; i++){QString lab = strPre + QString::number(i+1);headerLabs.append(lab);}ui->tableWidget->setColumnCount(count);ui->tableWidget->setHorizontalHeaderLabels(headerLabs);ui->spinBoxCol->setRange(1, count);}{int count = 10;QString strPre("行");QStringList headerLabs;for(int i=0; i<count; i++){QString lab = strPre + QString::number(i+1);headerLabs.append(lab);}ui->tableWidget->setRowCount(count);ui->tableWidget->setVerticalHeaderLabels(headerLabs);ui->spinBoxRow->setRange(1, count);}QStringList listType = m_hashIdxType.values();ui->comboBox->addItems(listType);}void Widget::on_btnAddCellWdg_clicked(){int row = ui->spinBoxRow->value();int col = ui->spinBoxCol->value();QString tabPosInfo = QString("单元格(行%1列%2)").arg(row).arg(col);QString tabPos = QString("%1%2").arg(row).arg(col);QString strTypeName = ui->comboBox->currentText();int curIdx = m_hashIdxType.key(strTypeName);QString txt = strTypeName + tabPos;QWidget *wdgAdd = nullptr;switch (curIdx) {case CWT_CheckBox:{QCheckBox *chkBox = new QCheckBox(txt);chkBox->setChecked(true);wdgAdd = chkBox;break;}case CWT_SpinBox:{QSpinBox *spinBox = new QSpinBox;QString strVal = QString("%1%2").arg(row).arg(col);spinBox->setValue(strVal.toInt());wdgAdd = spinBox;break;}case CWT_PushButton:{wdgAdd = new QPushButton(txt);break;}case CWT_ComboBox:{QComboBox *cBox = new QComboBox;cBox->addItem(txt);wdgAdd = cBox;break;}default:break;}if( nullptr != wdgAdd ){row--; // 转换为tab中真实的行col--; // 转换为tab中真实的列wdgAdd->setObjectName(txt);QWidget *wdgPre = ui->tableWidget->cellWidget(row, col); //之前的控件QString strMsg = tabPosInfo;if( nullptr != wdgPre ){qDebug() << "removeCellWidget at(" << row << "," << col << ")";ui->tableWidget->removeCellWidget(row, col);QString objN = wdgPre->objectName();delete wdgPre;wdgPre = nullptr;strMsg += QString("移除控件\"%1\",").arg(objN);}ui->tableWidget->setCellWidget(row, col, wdgAdd);strMsg += QString("添加控件\"%1\"").arg(txt);ui->plainTextEdit->appendPlainText(strMsg);}}void Widget::on_tableWidget_cellClicked(int row, int column){ui->spinBoxCol->setValue(column+1);ui->spinBoxRow->setValue(row+1);}
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加油，向未来！GO~
Come on！
