Qt 自定义Model和自定义Delegate

#include "mydelegate.h" #include <QtWidgets> int m_indexflush = -1; MyDelegate::MyDelegate(QObject*parent):QStyledItemDelegate(parent) { close_hightlight_index = -1; } void MyDelegate::paint(QPainter * painter, const QStyleOptionViewItem & option, const QModelIndex & index) const { QString picstr = index.data(Qt::DecorationRole).toString(); if(picstr.isEmpty()) return; QPixmap pixmap(picstr); QRect rect = option.rect; QRect picrect; picrect = QRect(rect.left()+(rect.width()-pixmap.width())/2,rect.top()+(rect.height()-pixmap.height())/2,pixmap.width(),pixmap.height()); painter->drawPixmap(picrect,pixmap); painter->save(); if( option.state&QStyle::State_MouseOver || (m_indexflush == index.row())) { painter->setPen(QPen(Qt::lightGray)); painter->drawRect(rect.left(),rect.top(),rect.width()-1,rect.height()-1); if(close_hightlight_index == index.row()) { QPixmap closepic("F:\\myproj\\QML\\TestListModel_Update\\close.png"); QRect closerect = QRect(rect.left()+rect.width()-closepic.width()-1,rect.top()+1,closepic.width(),closepic.height()); painter->drawPixmap(closerect,closepic); } else { QPixmap closepic("F:\\myproj\\QML\\TestListModel_Update\\close_a.png"); QRect closerect = QRect(rect.left()+rect.width()-closepic.width()-1,rect.top()+1,closepic.width(),closepic.height()); painter->drawPixmap(closerect,closepic); } m_indexflush = -1; } else { } painter->restore(); } bool MyDelegate::editorEvent(QEvent * event, QAbstractItemModel * model, const QStyleOptionViewItem & option, const QModelIndex & index) { QRect rect = option.rect; QPixmap closepic("F:\\myproj\\QML\\TestListModel_Update\\close.png"); QRect closerect = QRect(rect.left()+rect.width()-closepic.width()-1,rect.top()+1,closepic.width(),closepic.height()); QMouseEvent *mouseevent = static_cast<QMouseEvent*>(event); if(!mouseevent) return false; if(mouseevent->type() == QEvent::MouseButtonRelease && closerect.contains(mouseevent->pos())) { m_indexflush = index.row(); emit signal_deleteclick(index); } if(mouseevent->type() == QEvent::MouseMove) { if(closerect.contains(mouseevent->pos()) ) { close_hightlight_index = index.row(); emit signal_mousemovedel(index); } else { close_hightlight_index = -1; emit signal_mousemovedel(QModelIndex()); } qDebug()<<close_hightlight_index; } return QStyledItemDelegate::editorEvent(event,model,option,index); }