“Qt”+“C++”+QTableWidget控件自定义表头，合并，重写样式

#pragma execution_character_set("utf-8") #include "CustomTableWidget.h" #include <QHeaderView> #include <QDebug> #include <QTextOption> #include <QPainter> #include <QPushButton> #include <QHBoxLayout> #include <QScrollBar> #include <QHeaderView> #define HEADER_ROW_NUM 2 #define HEADER_COLUMN_NUM 15 #define HEADER_HEIGHT 23 #define ROWHEIGHT 30 //行高 C_CustomTableWidget::C_CustomTableWidget(QWidget *parent) : QTableWidget(parent) { initTableWidgetHeaderFrozen(); initTableWidgetContent(); } C_CustomTableWidget::~C_CustomTableWidget() { delete m_pTableWidgetHeaderFrozen; } void C_CustomTableWidget::initTableWidgetContent() { clearContents(); setColumnCount(HEADER_COLUMN_NUM); horizontalHeader()->setVisible(true); // 水平表头可见 int headerHeight = m_pTableWidgetHeaderFrozen->rowHeight(0) + m_pTableWidgetHeaderFrozen->rowHeight(1); // 设置成被m_pTableWidgetHeaderFrozen遮挡住 horizontalHeader()->setFixedHeight(headerHeight); verticalHeader()->setVisible(false); // 表头不可见 // setShowGrid(false); // 网格线不可见 setEditTriggers(QAbstractItemView::NoEditTriggers); // 设置单元格不可编辑 setSelectionMode(QAbstractItemView::SingleSelection); // 单选 setSelectionBehavior(QAbstractItemView::SelectRows); // 选择行 horizontalHeader()->setStretchLastSection(true); // 最后一个单元格扩展 setFocusPolicy(Qt::NoFocus); // 解决选中虚框问题 setFrameShape(QFrame::NoFrame); // 去除边框 setVerticalScrollMode(ScrollPerPixel); setHorizontalScrollMode(ScrollPerPixel); setItemDelegate(new ItemDelegate(1)); // 设置绘画代理（主要在代理中画出来header） } void C_CustomTableWidget::initTableWidgetHeaderFrozen() { m_pTableWidgetHeaderFrozen = new QTableWidget(this); m_pTableWidgetHeaderFrozen->horizontalHeader()->setVisible(false); // 表头不可见 m_pTableWidgetHeaderFrozen->verticalHeader()->setVisible(false); // 表头不可见 m_pTableWidgetHeaderFrozen->setShowGrid(false); // 网格线不可见 m_pTableWidgetHeaderFrozen->setEditTriggers(QAbstractItemView::NoEditTriggers); // 设置单元格不可编辑 m_pTableWidgetHeaderFrozen->horizontalHeader()->setStretchLastSection(true); // 最后一个单元格扩展 m_pTableWidgetHeaderFrozen->setFocusPolicy(Qt::NoFocus); // 解决选中虚框问题 m_pTableWidgetHeaderFrozen->setFrameShape(QFrame::NoFrame); // 去除边框 m_pTableWidgetHeaderFrozen->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); // 隐藏滚动条 m_pTableWidgetHeaderFrozen->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); // m_pTableWidgetHeaderFrozen->setHorizontalScrollMode(ScrollPerPixel); m_pTableWidgetHeaderFrozen->setItemDelegate(new ItemDelegate(0)); // 设置绘画代理（主要在代理中画出来header） viewport()->stackUnder(m_pTableWidgetHeaderFrozen); // 设置窗口层次 m_pTableWidgetHeaderFrozen->setRowCount(HEADER_ROW_NUM); // header 2行 m_pTableWidgetHeaderFrozen->setColumnCount(HEADER_COLUMN_NUM); // header 15列 m_pTableWidgetHeaderFrozen->setRowHeight(0, HEADER_HEIGHT); // 第一行设置高度23px m_pTableWidgetHeaderFrozen->setRowHeight(1, HEADER_HEIGHT); // 第二行设置高度23px for (int nRow = 2; nRow < m_pTableWidgetHeaderFrozen->rowCount(); ++nRow) // 隐藏2行后的行 m_pTableWidgetHeaderFrozen->setRowHidden(nRow, true); //===================设置header内容=================// // 合并单元格 m_pTableWidgetHeaderFrozen->setSpan(0, 0, 2, 1); // 名称 m_pTableWidgetHeaderFrozen->setSpan(0, 1, 1, 6); // 11111 m_pTableWidgetHeaderFrozen->setSpan(0, 7, 1, 6); // 22222 m_pTableWidgetHeaderFrozen->setSpan(0, 13, 2, 1); // 33333 m_pTableWidgetHeaderFrozen->setSpan(0, 14, 2, 1); // 44444 // 设置表头内容 m_pTableWidgetHeaderFrozen->setItem(0, 0, new QTableWidgetItem("名称")); m_pTableWidgetHeaderFrozen->setItem(0, 1, new QTableWidgetItem("11111")); m_pTableWidgetHeaderFrozen->setItem(0, 7, new QTableWidgetItem("22222")); m_pTableWidgetHeaderFrozen->setItem(0, 13, new QTableWidgetItem("33333")); m_pTableWidgetHeaderFrozen->setItem(0, 14, new QTableWidgetItem("444444")); QStringList slHeaderLabels; slHeaderLabels << QString("1") << QString("2") << QString("3") << QString("4") << QString("5") << QString("6"); for(int i = 1; i < 7; ++i) { m_pTableWidgetHeaderFrozen->setItem(1, i, new QTableWidgetItem(slHeaderLabels.at(i-1))); } for(int i = 7; i < 13; ++i) { m_pTableWidgetHeaderFrozen->setItem(1, i, new QTableWidgetItem(slHeaderLabels.at(i-7))); } // 连接信号槽,用于滚动条联动 connect(m_pTableWidgetHeaderFrozen->verticalScrollBar(), &QAbstractSlider::valueChanged, verticalScrollBar(), &QAbstractSlider::setValue); connect(verticalScrollBar(), &QAbstractSlider::valueChanged, m_pTableWidgetHeaderFrozen->verticalScrollBar(), &QAbstractSlider::setValue); connect(horizontalScrollBar(), &QScrollBar::valueChanged, m_pTableWidgetHeaderFrozen->horizontalScrollBar(), &QScrollBar::setValue); updateTableWidgetHeaderFrozenGeometry(); // 更新位置 m_pTableWidgetHeaderFrozen->show(); } void C_CustomTableWidget::updateTableWidgetHeaderFrozenGeometry() { m_pTableWidgetHeaderFrozen->setGeometry(frameWidth(), frameWidth(), viewport()->width(), horizontalHeader()->height()); } void C_CustomTableWidget::resizeEvent(QResizeEvent *event) { QTableView::resizeEvent(event); updateTableWidgetHeaderFrozenGeometry(); } QModelIndex C_CustomTableWidget::moveCursor(QAbstractItemView::CursorAction cursorAction, Qt::KeyboardModifiers modifiers) { QModelIndex current = QTableView::moveCursor(cursorAction, modifiers); if (cursorAction == MoveUp && current.row() > 0 && visualRect(current).topLeft().y() < m_pTableWidgetHeaderFrozen->rowHeight(1) ){ const int newValue = verticalScrollBar()->value() + visualRect(current).topLeft().y() - m_pTableWidgetHeaderFrozen->rowHeight(0) - m_pTableWidgetHeaderFrozen->rowHeight(1); verticalScrollBar()->setValue(newValue); } return current; } void C_CustomTableWidget::scrollTo(const QModelIndex &index, QAbstractItemView::ScrollHint hint) { if (index.row() > 0) QTableView::scrollTo(index, hint); } ItemDelegate::ItemDelegate(int type, QObject *parent) : QStyledItemDelegate(parent), m_type(type) { } void ItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const { if(0 == m_type) //header tablewidget { int rowIndex = index.row(); // 行号 int colIndex = index.column(); // 列号 if (rowIndex == 0 || rowIndex == 1) // 前两行作为header { //背景 QColor color; if (rowIndex == 0 && (colIndex == 0 || // 名称 colIndex == 13 || // 33333 colIndex == 14)) // 44444 { color.setRgb(231, 238, 251); } else if ((rowIndex == 0 && colIndex == 1) || // 11111 (rowIndex == 1 && (colIndex == 1 || // 1 colIndex == 2 || // 2 colIndex == 3 || // 3 colIndex == 4 || // 4 colIndex == 5 || // 5 colIndex