Qt之QAbstractItemView视图项拖拽

#include "stdafx.h" #include <QtGui/QStandardItemModel> #include <QtWidgets/QLineEdit> #include <QtWidgets/QTableView> #include <QtWidgets/QListWidget> #include <QtWidgets/QPushButton> #include <QtWidgets/QVBoxLayout> #include <QtWidgets/QHBoxLayout> #include "DragList.h" #include "StockItemDelegate.h" #include "StockSortFilterProxyModel.h" #include "StockListWidget.h" #define DropWidgetMaxHeight 170 #define DropWidgetMaxWidth 230 StockTableView::StockTableView(QStandardItemModel * model, QWidget * parent) : QTableView(parent) , currHovered(-1) { m_pSourceModel = model; setMouseTracking(true); } void StockTableView::SetMouseOver(int row) { if (row == currHovered) { return; } StockSortFilterProxyModel * sortModel = static_cast<StockSortFilterProxyModel *>(model()); if (sortModel->rowCount() <= row) { return; } for (int col = 0; col < sortModel->columnCount(); col++) { QModelIndex index = sortModel->index(row, col); if (index.isValid()) { if (QStandardItem * item = m_pSourceModel->itemFromIndex(sortModel->mapToSource(index))) { item->setBackground(QBrush(QColor(43, 92, 151))); } } } if (currHovered != -1) { disableMouseOver(); } currHovered = row; } void StockTableView::disableMouseOver() { StockSortFilterProxyModel * sortModel = static_cast<StockSortFilterProxyModel *>(model()); for (int col = 0; col < sortModel->columnCount(); col++) { QModelIndex index = sortModel->index(currHovered, col); if (index.isValid()) { if (QStandardItem * item = m_pSourceModel->itemFromIndex(sortModel->mapToSource(index))) { item->setBackground(QBrush(QColor(60, 69, 77))); } } } } void StockTableView::mouseMoveEvent(QMouseEvent * event) { int row = rowAt(event->pos().y()); if (row != -1) { StockSortFilterProxyModel * sortModel = static_cast<StockSortFilterProxyModel *>(model()); for (int col = 0; col < sortModel->columnCount(); col++) { QModelIndex index = sortModel->index(currHovered, col); if (index.isValid()) { if (QStandardItem * item = m_pSourceModel->itemFromIndex(sortModel->mapToSource(index))) { item->setBackground(QBrush(QColor(43, 92, 151))); } } } } QTableView::mouseMoveEvent(event); } void StockTableView::leaveEvent(QEvent * event) { disableMouseOver(); return __super::leaveEvent(event); } void StockTableView::mousePressEvent(QMouseEvent * event) { int clickRow = rowAt(event->pos().y()); if (clickRow != -1) { StockSortFilterProxyModel * sortModel = static_cast<StockSortFilterProxyModel *>(model()); { QModelIndex index = sortModel->index(clickRow, 0); if (index.isValid()) { if (QStandardItem * item = m_pSourceModel->itemFromIndex(sortModel->mapToSource(index))) { qDebug() << item->text(); } } } } return __super::mousePressEvent(event); } struct StockListWidgetPrivate { QStandardItemModel * m_pListModel = nullptr; StockSortFilterProxyModel * m_pFilterModel = nullptr; QLineEdit * m_pSearchLineEdit = nullptr; QWidget * m_pTitleWidget = nullptr; QListWidget * m_pStockList = nullptr; StockTableView * m_pStockPreview = nullptr; QWidget * m_pStockPreviewWidget = nullptr; }; StockListWidget::StockListWidget(QWidget * parent) : QWidget(parent) , d_ptr(new StockListWidgetPrivate) { InitializeUI(); setStyleSheet(QString("QWidget#StockListTitle{ background:#1B1D21; }" "QPushButton#StockListSearchButton{border:0px;background:white;}" "QLineEdit#StockListSearchEdit{border:0px;background:white;}" "QWidget#StockPreviewWidget{border:0;}" "QWidget#StockPreviewWidget QTableView{border:0;}")); qApp->installNativeEventFilter(this); } StockListWidget::~StockListWidget() { } void StockListWidget::NativeParentWindowMove() { if (d_ptr->m_pStockPreviewWidget) { d_ptr->m_pStockPreviewWidget->move(d_ptr->m_pTitleWidget->mapToGlobal(QPoint(0, d_ptr->m_pTitleWidget->height() - 2))); } } void StockListWidget::moveEvent(QMoveEvent * event) { NativeParentWindowMove(); return __super::moveEvent(event); } bool StockListWidget::nativeEventFilter(const QByteArray & eventType, void * message, long * result) { if (eventType == "windows_generic_MSG" || eventType == "windows_dispatcher_MSG") { MSG * pMsg = reinterpret_cast<MSG *>(message); if (pMsg->message == WM_MOVE) { NativeParentWindowMove(); } } return false; } void StockListWidget::InitializeUI() { QWidget * backgroundWidget = new QWidget; QVBoxLayout * mainLayout = new QVBoxLayout; backgroundWidget->setObjectName(QStringLiteral("StockListBg")); mainLayout->setSpacing(0); mainLayout->setMargin(0); //水平编辑框 d_ptr->m_pTitleWidget = new QWidget; QHBoxLayout * titleLayout = new QHBoxLayout; QPushButton * searchButton = new QPushButton; d_ptr->m_pSearchLineEdit = new QLineEdit; d_ptr->m_pSearchLineEdit->installEventFilter(this); connect(d_ptr->m_pSearchLineEdit, &QLineEdit::textChanged, this, [this](const QString & text){ if (d_ptr->m_pFilterModel) { d_ptr->m_pFilterModel->SetFilterContext(text); } if (d_ptr->m_pStockPreviewWidget) { d_ptr->m_pStockPreviewWidget->move(d_ptr->m_pTitleWidget->mapToGlobal(QPoint(0, d_ptr->m_pTitleWidget->height()))); int rowHeight = d_ptr->m_pStockPreview->rowHeight(0); int rowCount = d_ptr->m_pFilterModel->rowCount(); d_ptr->m_pStockPreviewWidget->setFixedHeight(rowHeight * rowCount > DropWidgetMaxHeight ? DropWidgetMaxHeight : rowHeight * rowCount); d_ptr->m_pStockPreviewWidget->show(); } }); connect(d_ptr->m_pSearchLineEdit, &QLineEdit::editingFinished, this, [this]{ if (d_ptr->m_pStockPreviewWidget) { d_ptr->m_pStockPreviewWidget->setVisible(false); } }); d_ptr->m_pSearchLineEdit->setPlaceholderText(QStringLiteral("缩小检索范围")); d_ptr->m_pTitleWidget->setObjectName(QStringLiteral("StockListTitle")); searchButton->setObjectName(QStringLiteral("StockListSearchButton")); d_ptr->m_pSearchLineEdit->setObjectName(QStringLiteral("StockListSearchEdit")); d_ptr->m_pTitleWidget->setFixedHeight(25); titleLayout->setSpacing(0); titleLayout->setContentsMargins(10, 2, 10, 2); searchButton->setFixedSize(16, 16); titleLayout->addWidget(searchButton); titleLayout->addWidget(d_ptr->m_pSearchLineEdit, 1); d_ptr->m_pTitleWidget->setLayout(titleLayout); mainLayout->addWidget(d_ptr->m_pTitleWidget); //已选个股列表 d_ptr->m_pStockList = new DragList; mainLayout->addWidget(d_ptr->m_pStockList, 1); backgroundWidget->setLayout(mainLayout); QVBoxLayout * fwLayout = new QVBoxLayout; fwLayout->setSpacing(0); fwLayout->setMargin(0); fwLayout->addWidget(backgroundWidget); setLayout(fwLayout); //初始化搜索个股列表 d_ptr->m_pStockPreviewWidget = new QWidget(this); QVBoxLayout * previewLayout = new QVBoxLayout; d_ptr->m_pListModel = new QStandardItemModel; d_ptr->m_pStockPreview = new StockTableView(d_ptr->m_pListModel); d_ptr->m_pFilterModel = new StockSortFilterProxyModel; d_ptr->m_pStockPreviewWidget->setObjectName(QStringLiteral("StockPreviewWidget")); d_ptr->m_pStockPreview->horizontalHeader()->setVisible(false); d_ptr->m_pStockPreview->verticalHeader()->setVisible(false); d_ptr->m_pStockPreview->setShowGrid(false); d_ptr->m_pStockPreview->horizontalHeader()->setStretchLastSection(true); d_ptr->m_pStockPreview->setMouseTracking(true); d_ptr->m_pStockPreview->installEventFilter(this); previewLayout->setSpacing(0); previewLayout->setMargin(0); previewLayout->addWidget(d_ptr->m_pStockPreview); d_ptr->m_pStockPreviewWidget->setLayout(previewLayout); QStandardItemModel model(100, 2); for (int row = 0; row < 100; ++row) { for (int column = 0; column < 2; ++column) { QStandardItem * item = new QStandardItem(QString::number(ro