QTableView中的細胞是空的，但標題顯示

Question

我創建了一個代表從Qt的微調框代表實例幾乎複製，我試圖填補一個QTableView中。不過，我收到一個奇怪的問題，表頭顯示，但單元格爲空，無法點擊。

代碼委託：

#include "double_spinbox_delegate.h" 

DoubleSpinBoxDelegate::DoubleSpinBoxDelegate(QObject *parent) : QItemDelegate(parent){} 

QWidget *DoubleSpinBoxDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const{ 
    QDoubleSpinBox *editor = new QDoubleSpinBox(parent); 
    editor->setValue(0); 

// if (index.column() == 0){ 
//  editor->setMinimum(0); 
//  editor->setMaximum(255); 
// } 
// else{ 
//  editor->setMinimum(0); 
//  editor->setMaximum(1); 
// } 

    return editor; 
} 

void DoubleSpinBoxDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const{ 
    double value = index.model()->data(index, Qt::EditRole).toDouble(); 

    QDoubleSpinBox *doubleSpinBox = static_cast<QDoubleSpinBox*>(editor); 
    doubleSpinBox->setValue(value); 
} 

void DoubleSpinBoxDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const{ 
    QDoubleSpinBox *doubleSpinBox = static_cast<QDoubleSpinBox*>(editor); 
    doubleSpinBox->interpretText(); 
    double value = doubleSpinBox->value(); 

    model->setData(index, value, Qt::EditRole); 
} 

void DoubleSpinBoxDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const{ 
    editor->setGeometry(option.rect); 
} 

和我打電話的形式構造

void MainWindow::InitializeColorTable(){ 
    QTableView *tableColor = ui->tableColor; 

    QStandardItemModel *model = new QStandardItemModel(4, 4, ui->tableColor); 
    // QStandardItemModel *model = this->colorTableModel; 
    tableColor->setModel(model); 

    DoubleSpinBoxDelegate delegate; 
    tableColor->setItemDelegate(&delegate); 

    model->setHorizontalHeaderLabels(QStringList() << tr("Value") << tr("R") << tr("G") << tr("B")); 

    for (int row = 0; row < model->rowCount(); ++row){ 
     for (int col = 0; col < model->columnCount(); ++col){ 
      QModelIndex index = model->index(row, col, QModelIndex()); 
      model->setData(index, QVariant((row + 1.0) * (col + 1.0)), Qt::EditRole); 
     } 
    } 
} 

Answer 1

您的委託是在棧上分配的功能，它是在超出範圍後刪除。

DoubleSpinBoxDelegate delegate; 
tableColor->setItemDelegate(&delegate); 

用新的來創建你的委託。