自绘QTreeView，添加QPushbutton，并用样式设置按钮，进行美化

#include<QPainter> #include<QMouseEvent> #include <QHeaderView> #include"MyTableView.h" #include <QStyledItemDelegate> #include <QMessageBox> #ifndef NDEBUG #include<QDebug> #endif MyTableView::MyTableView(QWidget * parent) :QTableView(parent) { delegate=new MyItemDelegate; pushbuttondelegate = new PushbuttonDelegate(this); model=new MyStandardItemModel; model->setRowCount(6); model->setColumnCount(8); this->setStyleSheet("QTableView::item:selected{color:black;background:rgb(255,247,205);}"); this->setModel(model); QItemSelectionModel *selectionModel=new QItemSelectionModel(model); this->setSelectionModel(selectionModel); connect(selectionModel,SIGNAL(selectionChanged(QItemSelection,QItemSelection)),this,SLOT(selectionChanged(QItemSelection,QItemSelection))); this->setItemDelegateForColumn(0, delegate); this->setItemDelegateForColumn(1, pushbuttondelegate); this->resizeColumnsToContents(); this->resizeRowsToContents(); this->verticalHeader()->setVisible(false); this->setShowGrid(true); this->setSelectionBehavior(QAbstractItemView::SelectRows); this->setEditTriggers(QAbstractItemView::NoEditTriggers); this->setSelectionMode(QAbstractItemView::ExtendedSelection); this->setMouseTracking(true); this->setFocusPolicy(Qt::NoFocus); //去除选中虚线框 for(int i = 0 ; i < 8; i++) { this->setColumnWidth(i,120); } this->resize(675,250); } void MyTableView::selectionChanged(const QItemSelection &selected,const QItemSelection &deselected) { QTableView::selectionChanged(selected,deselected); delegate->selectedlist.clear(); QItemSelectionModel *selections = selectionModel(); delegate->selectedlist = selections->selectedIndexes(); } void MyTableView::rowClicked(const QModelIndex &index) { int column = index.column(); if(column == 1) QMessageBox::information(NULL,"提示",QString::number(column)); } MyItemDelegate::MyItemDelegate(QObject * parent) :QStyledItemDelegate(parent) { favouritePixmap=QPixmap(":/favourite.png"); notFavouritePixmap=QPixmap(":/no-favourite.png"); } void MyItemDelegate::paint(QPainter * painter, const QStyleOptionViewItem & option, const QModelIndex & index) const { QStyledItemDelegate::paint(painter, option, index); QPixmap star; for(int i=0; i<selectedlist.size(); i++) { if(selectedlist.at(i).row() == index.row()) { star=favouritePixmap; break; } } if(star.isNull()) star=notFavouritePixmap; int height=star.height(); QRect rect=option.rect; int x= 4; int y=rect.y()+rect.height()/2-height/2; painter->drawPixmap(x,y,star); QString str_index = QString::number(index.row()+1); QRect textrect(23,y+2,50,20); painter->drawText(textrect,str_index); } bool MyItemDelegate::editorEvent(QEvent * event, QAbstractItemModel * model, const QStyleOptionViewItem & /*option*/, const QModelIndex & index) { return false; } PushbuttonDelegate::PushbuttonDelegate(QWidget * parent) :QStyledItemDelegate(parent), m_PushButton(new QPushButton()) { m_parent = (MyTableView *)parent; b_clicked = false; currentBtn = 0; } PushbuttonDelegate::~PushbuttonDelegate() { } void PushbuttonDelegate::paint(QPainter * painter, const QStyleOptionViewItem & option, const QModelIndex & index) const { QStyleOptionViewItem viewOption(option); initStyleOption(&viewOption, index); if (option.state.testFlag(QStyle::State_HasFocus)) viewOption.state = viewOption.state ^ QStyle::State_HasFocus; QStyledItemDelegate::paint(painter, viewOption, index); QStyleOptionButton *opt = m_btns.value(index); if(!opt) { opt = new QStyleOptionButton(); } opt->state |= QStyle::State_Enabled; QString str_text = "信息未处理"; opt->text = str_text; QFont font = m_parent->font(); QFontMetrics fontmetr(font); int m_width= fontmetr.width(str_text); QRect rectbtn = QRect(option.rect.x()+(option.rect.width()-m_width)/2, option.rect.y()+8, m_width, 15); opt->rect = rectbtn; (const_cast<PushbuttonDelegate*>(this))->m_btns.insert(index, opt); QWidget *pWidget = m_PushButton.data(); QApplication::style()->drawControl(QStyle::CE_PushButton, opt, painter, pWidget); } bool PushbuttonDelegate::editorEvent(QEvent * event, QAbstractItemModel * model, const QStyleOptionViewItem & /*option*/, const QModelIndex & index) { QMouseEvent *mouse_event = static_cast<QMouseEvent*>(event); // 还原鼠标样式 QApplication::restoreOverrideCursor(); switch (event->type()) { case QEvent::MouseMove: { if(index.isValid()) { QStyleOptionButton* movetBtn = m_btns.value(index); if(movetBtn->rect.contains(mouse_event->pos())) { QApplication::setOverrideCursor(Qt::PointingHandCursor); } } break; } case QEvent::MouseButtonPress: { if(mouse_event->button() == Qt::LeftButton && !b_clicked) { currentBtn = m_btns.value(index); if(currentBtn->rect.contains(mouse_event->pos())) b_clicked = true; } break; } case QEvent::MouseButtonRelease: { if(mouse_event->button() == Qt::LeftButton && b_clicked) { QStyleOptionButton *newBtn = m_btns.value(index); if(newBtn == currentBtn && newBtn->rect.contains(mouse_event->pos())) { QMessageBox::information(NULL,"提示","按钮已响应"); } b_clicked = false; currentBtn = 0; } break; } default: break; } return false; } QVariant MyStandardItemModel::data( const QModelIndex & index, int role) const { int column=index.column(); if(role==Qt::DisplayRole && column>1) return column+1; else if(role==Qt::DisplayRole && column<=1) return ""; return QStandardItemModel::data(index,role); } QVariant MyStandardItemModel::headerData(int section, Qt::Orientation orientation, int role) const { if(section==0 && orientation==Qt::Horizontal) { if(role==Qt::DisplayRole) return "序号"; } return QStandardItemModel::headerData(section,orientation,role); }