qt树型表格，并带有多行表头，超牛

#include <QPainter> #include <QMouseEvent> #include <QIcon> #include <QCursor> #include <QMenu> #include <QAction> #include "HHeaderView.h" #include "HHeaderItemDelegate.h" #include "HHeaderModel.h" #include "DataTreeView.h" HHeaderView* HHeaderView::_Instance = NULL; HHeaderView::HHeaderView(Qt::Orientation orientation, QWidget * parent) : QHeaderView(orientation, parent) { _Instance = this; //设置代理，由代理进行画单元格 HHeaderItemDelegate* delegate = new HHeaderItemDelegate(); setItemDelegate(delegate); connect(this, SIGNAL(sectionResized(int,int,int)), this, SLOT(onSectionResized(int,int,int))); this->setResizeMode(QHeaderView::Interactive); //setCascadingSectionResizes(true); //this->setOffset(-5); this->setMovable(true); setClickable(true); //setMinimumSectionSize(166); //setStretchLastSection(true); //setHighlightSections(true); //setAttribute(Qt::WA_Hover, false); this->setWindowIcon(QIcon("./Resources/logo.ico")); // setDefaultSectionSize(100); _menu = new QMenu(this); _actHideCol = new QAction(this); _actHideCol->setText("隐藏列"); _actHideCol->setIcon(QIcon(":/Resources/scene.svg")); _actsortUp = new QAction(this); _actsortUp->setText("按A->Z排序"); _actsortUp->setIcon(QIcon(":/Resources/scene.svg")); _actSortDown = new QAction(this); _actSortDown->setText("按Z->A排序"); _actSortDown->setIcon(QIcon(":/Resources/scene.svg")); _menu->addAction(_actHideCol); _menu->addAction(_actsortUp); _menu->addAction(_actSortDown); _menu->hide(); } HHeaderView::~HHeaderView() { } int HHeaderView::sectionSizes(int lIndex, int sectionCount) { int width = 0; for(int i = lIndex; i < lIndex + sectionCount; ++i) { width += sectionSize(i); } return width; } QSize HHeaderView::sectionSizeFromContents(int logicalIndex) const { //return QHeaderView::sectionSizeFromContents(logicalIndex); QSize size; int maxWidth = 0; HHeaderModel* model = static_cast<HHeaderModel*> (this->model()); for(int i = 0; i < model->rowCount(QModelIndex()); ++i) { QFont fnt; QStyleOptionHeader opt; initStyleOption(&opt); fnt.setBold(true); opt.text = model->item(i, logicalIndex); opt.fontMetrics = QFontMetrics(fnt); size = style()->sizeFromContents(QStyle::CT_HeaderSection, &opt, QSize(), this); maxWidth = qMax(maxWidth, size.width()); } return QSize(maxWidth + 4, size.height() * model->rowCount(QModelIndex())); //主要是设置高度，宽度这里设指了没有用，需要由headerview的父窗体里设置 } void HHeaderView::paintEvent(QPaintEvent *event) { QPainter painter(viewport()); QMultiMap<int, int> rowSpanList; int cnt = this->count (); int curRow, curCol; HHeaderModel* model = static_cast<HHeaderModel*> (this->model()); for(int row = 0; row < model->rowCount(QModelIndex()); ++row) { for(int col = 0; col < model->columnCount(QModelIndex()); ++col) { curRow = row; curCol = col; QStyleOptionViewItemV4 opt = viewOptions(); QStyleOptionHeader header_opt; initStyleOption(&header_opt); header_opt.textAlignment = Qt::AlignCenter; // header_opt.icon = QIcon("./Resources/logo.ico"); QFont fnt; fnt.setBold(true); header_opt.fontMetrics = QFontMetrics(fnt); opt.fontMetrics = QFontMetrics(fnt); QSize size = style()->sizeFromContents(QStyle::CT_HeaderSection, &header_opt, QSize(), this); // size.setHeight(25); header_opt.position = QStyleOptionHeader::Middle; //判断当前行是否处于鼠标悬停状态 if(_hoverIndex == model->index(row, col, QModelIndex())) { header_opt.state |= QStyle::State_MouseOver; // header_opt.state |= QStyle::State_Active; } opt.text = model->item(row, col); header_opt.text = model->item(row, col); CellSpan span = model->getSpan(row, col); int rowSpan = span._rowSpan; int columnSpan = span._colSpan; if(columnSpan > 1 && rowSpan > 1) {//单元格跨越多列和多行, 不支持，改为多行1列 continue; /*header_opt.rect = QRect(sectionViewportPosition(logicalIndex(col)), row * size.height(), sectionSizes(col, columnSpan), rowSpan * size.height()); opt.rect = header_opt.rect; col += columnSpan - 1; */ } else if(columnSpan > 1) {//单元格跨越多行 header_opt.rect = QRect(sectionViewportPosition(logicalIndex(col)), row * size.height(), sectionSizes(col, columnSpan), size.height()); opt.rect = header_opt.rect; col += columnSpan - 1; } else if(rowSpan > 1) {//单元格跨越多行 header_opt.rect = QRect(sectionViewportPosition(logicalIndex(col)), row * size.height(), sectionSize(logicalIndex(col)), size.height() * rowSpan); opt.rect = header_opt.rect; for(int i = row + 1; i <= rowSpan - 1; ++i) { rowSpanList.insert(i, col); } } else {//正常的单元格 header_opt.rect = QRect(sectionViewportPosition(logicalIndex(col)), row * size.height(), sectionSize(logicalIndex(col)), size.height()); opt.rect = header_opt.rect; } opt.state = header_opt.state; //opt.displayAlignment = Qt::AlignCenter; opt.icon = QIcon("./Resources/logo.ico"); //opt.backgroundBrush = QBrush( QColor(255,0,0)); QMultiMap<int, int>::iterator it = rowSpanList.find(curRow, curCol); if(it == rowSpanList.end()) { //保存当前item的矩形 _itemRectMap[curRow][curCol] = header_opt.rect; itemDelegate()->paint(&painter, opt, model->index(curRow, curCol, QModelIndex())); } else { //如果是跨越多行1列的情况，采用默认的paint } } } } void HHeaderView::onSectionResized(int logicalIndex, int oldSize, int newSize) { if (0 == newSize) {//过滤掉隐藏列导致的resize viewport()->update(); return; } static bool selfEmitFlag = false; if (selfEmitFlag) { return; } int minWidth = 99999; QFontMetrics metrics(this->font()); //获取这列上最小的字体宽度，移动的长度不能大于最小的字体宽度 HHeaderModel* model = static_cast<HHeaderModel*> (this->model()); for(int i = 0; i < model->rowCount(QModelIndex()); ++i) { QString text = model->item(i, logicalIndex); if (text.isEmpty()) continue; int textWidth = metrics.width(text); if (minWidth > textWidth) { minWidth = textWidth; } } if (newSize < minWidth) { selfEmitFlag = true; this->resizeSection(logicalIndex, oldSize); selfEmitFlag = false; } viewport()->update(); } /* int HHeaderView::sectionSizeHint(int logicalIndex) { if (logicalIndex == 0) { return 10; } } */ //算出当前鼠标位置所在的index QModelIndex HHeaderView::indexAt(const QPoint& pos) const { int x = pos.x(); int y = pos.y(); QMap<int, QRect>::Iterator iterCol; QMap<int, QMap<int, QRect> >::Iterator iterRow = _itemRectMap.begin(); for (; iterRow != _itemRectMap.end(); ++iterRow) { for (iterCol = iterRow.value().begin(); iterCol != iterRow.value().end(); ++iterCol) { if(x > it