tableWidget添加按钮，添加下拉框，控件合并拆分

#include "mainwindow.h" #include <QHeaderView> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) { /* 设置主窗体的大小与位置 */ this->setGeometry(0, 0, 800, 480); /* 实例化 */ tableWidget = new QTableWidget(this); /* 设置tableWidget表居中 */ setCentralWidget(tableWidget); /* 设置列数 */ tableWidget->setColumnCount(4); /* 设置行数 */ tableWidget->setRowCount(1); /* 设置列宽 */ tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch); //x先自适应宽度 tableWidget->horizontalHeader()->setSectionResizeMode(0, QHeaderView::ResizeToContents); //然后设置要根据内容使用宽度的列 /* 使用标签设置水平标题标签 */ tableWidget->setHorizontalHeaderLabels(QStringList()<<"温度（℃）"<<"时间（S）"<<"按钮"<<"下拉框" ); /* 设置选中背景色 */ tableWidget->setStyleSheet("selection-background-color:lightblue;"); /* 开启交替行背景色 */ tableWidget->setAlternatingRowColors(true); /* 设置整行选中的方式 */ tableWidget->setSelectionBehavior(QAbstractItemView::SelectRows); /* 设置为可以选中多个目标,按ctrl键 */ tableWidget->setSelectionMode(QAbstractItemView::ExtendedSelection); /* 按行填写内容并设置每个单元格格式 */ for (int row = 0; row < tableWidget->rowCount() ; row++) { /* 填写单元格内容 */ tableWidget->setItem(row,0,new QTableWidgetItem("20")); tableWidget->setItem(row,1,new QTableWidgetItem("10")); /* 设置文本居中对齐 */ tableWidget->item(row,0)->setTextAlignment(Qt::AlignCenter); tableWidget->item(row,1)->setTextAlignment(Qt::AlignCenter); /* 获取原有字体设置 */ QFont font = tableWidget->item(row,0) ->font(); /* 设置为粗体 */ font.setBold(true); /* 字体大小 */ font.setPointSize(12); /* 字体颜色 */ tableWidget->item(row,0)->setTextColor(Qt::red); /* 设置字体 */ tableWidget->item(row,0)->setFont(font); } /* 打开右键菜单 */ tableWidget->setContextMenuPolicy(Qt::CustomContextMenu); /* 添加按钮 */ m_menu = new QMenu(this); m_actionAdd = new QAction("添加",m_menu); connect(m_actionAdd,&QAction::triggered,this,&MainWindow::slotAdd); /* 删除按钮 */ m_actionDel = new QAction("删除",m_menu); connect(m_actionDel,&QAction::triggered,this,&MainWindow::slotDel); /* 清空按钮 */ m_actionEmpty = new QAction("清空",m_menu); connect(m_actionEmpty,&QAction::triggered,this,&MainWindow::sloEmpty); /* 添加添加按钮 */ m_menu->addAction(m_actionAdd); /* 添加删除按钮 */ m_menu->addAction(m_actionDel); /* 添加清空按钮 */ m_menu->addAction(m_actionEmpty); connect(tableWidget,&QTableWidget::customContextMenuRequested,this,&MainWindow::slotPopMenu); QPushButton *pushButton = new QPushButton(); pushButton->setText("BT1"); tableWidget->setCellWidget(0, 2, pushButton); connect(pushButton, SIGNAL(clicked()), this,SLOT(pushButton_Clicked())); QComboBox *combox = new QComboBox(tableWidget); combox->addItem("combox1"); combox->addItem("combox2"); //选择box2 combox->setCurrentIndex(1); //添加到表格中 tableWidget->setCellWidget(0, 3, combox); //链接信号槽 connect(combox, SIGNAL(currentIndexChanged(int)), this, SLOT(comboxchange())); // 实时获得结 } //按钮改名 void MainWindow::pushButton_Clicked( ){ /* 获取选中行号 */ int row = tableWidget->currentRow(); //声明一个widget 再降widget转为QPushButton QWidget *widget = tableWidget->cellWidget(row, 2); QPushButton *btn = (QPushButton *)widget; btn->setText("BUTTTON-" + QString::number(row)); } //该行的按钮名 void MainWindow::comboxchange(){ /* 获取选中行号 */ int row = tableWidget->currentRow(); if(row<0) return; QWidget *widget = tableWidget->cellWidget(row, 3); QComboBox *combox = (QComboBox *)widget; if(combox->currentText() == "combox1") { //清空表格内容 及控件 tableWidget->clear(); //合并单元格 if(row<tableWidget->rowCount()) { tableWidget->setSpan( row , 2, tableWidget->rowCount() - 1, 1); tableWidget->setSpan( row , 3, tableWidget->rowCount() - 1, 1); } //重新添加控件 注意row为选中行 for(int i=0 ;i<=row;i++) { QPushButton *pushButton = new QPushButton(); pushButton->setText("BTN"); tableWidget->setCellWidget(i, 2, pushButton); connect(pushButton, SIGNAL(clicked()), this,SLOT(pushButton_Clicked())); QComboBox *combox = new QComboBox(tableWidget); combox->addItem("combox1"); combox->addItem("combox2"); combox->setCurrentIndex(1); tableWidget->setCellWidget(i, 3, combox); connect(combox, SIGNAL(currentIndexChanged(int)), this, SLOT(comboxchange())); // 实时获得结 if(i==row) combox->setCurrentIndex(0); } }else{ //拆分 tableWidget->clearSpans(); for(int i=0 ;i< tableWidget->rowCount() ;i++) { QPushButton *pushButton = new QPushButton(); pushButton->setText("BTN"); tableWidget->setCellWidget(i, 2, pushButton); connect(pushButton, SIGNAL(clicked()), this,SLOT(pushButton_Clicked())); QComboBox *combox = new QComboBox(tableWidget); combox->addItem("combox1"); combox->addItem("combox2"); combox->setCurrentIndex(1); tableWidget->setCellWidget(i, 3, combox); connect(combox, SIGNAL(currentIndexChanged(int)), this, SLOT(comboxchange())); // 实时获得结 } } } /* 添加单元格 */ void MainWindow::slotAdd() { /* 获取选中行号 */ int row = tableWidget->currentRow(); /* 当没有任何选中目标时row返回值为-1 */ /* 这是将在第一行添加 */ if(row<0) row=0; /* 在选中行号位置添加新行 */ tableWidget->insertRow(row); /* 添加内容 */ tableWidget->setItem(row,0,new QTableWidgetItem("20")); tableWidget->setItem(row,1,new QTableWidgetItem("10")); /* 文字水平居中 */ /* 如需字体格式参上 */ tableWidget->item(row,0)->setTextAlignment(Qt::AlignCenter); tableWidget->item(row,1)->setTextAlignment(Qt::AlignCenter); //添加按钮 QPushButton *pushButton = new QPushButton(); pushButton->setText("BTN"); tableWidget->setCellWidget(row, 2, pushButton); connect(pushButton, SIGNAL(clicked()), this,SLOT(pushButton_Clicked())); //添加combox QComboBox *combox = new QComboBox(tableWidget); combox->addItem("combox1"); combox->addItem("combox2"); //选择box2 combox->setCurrentIndex(1); //添加到表格中 tableWidget->setCellWidget(row, 3, combox); //链接信号槽 connect(combox, SIGNAL(currentIndexChanged(int)), this, SLOT(comboxchange())); // 实时获得结 } /* 删除单元格 */ void MainWindow::slotDel() { /* 获取总行数 */ int row = tableWidget->currentRow(); /* 当没有任何选中目标时row返回值为-1 */ if(row>0) tableWidget->removeRow(row); } /* 清空单元格 */ void MainWindow::sloEmpty() { /* 获取总行数 */ int row = tableWidget->rowCount(); for(;row>=0;row--) tableWidget->removeRow(row); } /* 右键弹窗位置 */ void MainWindow::slotPopMenu(const QPoint &pos) { m_menu->exec(tableWidget->mapToGlobal(pos)); } MainWindow::~MainWindow() { }