Why TextButtonDelegate::createEditor not be called ?

[Tricoffee]

// TextButtonDelegate.cpp file
#include "TextButtonDelegate.h"
#include <QAbstractItemView>
#include <QEvent>
TextButtonDelegate::TextButtonDelegate(QObject* parent) : QStyledItemDelegate(parent)
{
    //installEventFilter(this);
    //setEditTriggers(QAbstractItemView::AllEditTriggers);
}
void TextButtonDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    //qDebug() << "void TextButtonDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const ";
    // draw text
    QString displayedText = option.fontMetrics.elidedText(index.data(Qt::DisplayRole).toString(), Qt::ElideRight, option.rect.width());
    painter->drawText(option.rect, displayedText);
    // draw addButton
    QPixmap addButtonPixmap(":/XVisual/images/bold.png");
    int addButtonX = option.rect.right() - 60;
    int addButtonY = option.rect.center().y() - addButtonPixmap.height() / 2;
    painter->drawPixmap(addButtonX, addButtonY, addButtonPixmap);
    // draw deleteButton
    QPixmap deleteButtonPixmap(":/XVisual/images/delete.png");
    int deleteButtonX = option.rect.right() - 20;
    int deleteButtonY = option.rect.center().y() - deleteButtonPixmap.height() / 2;
    painter->drawPixmap(deleteButtonX, deleteButtonY, deleteButtonPixmap);
    QStyledItemDelegate::paint(painter, option, index);
}
QWidget* TextButtonDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    qDebug() << "Creating editor for item:" << index.data(Qt::DisplayRole).toString();
    QWidget* editor = new QWidget(parent);
    QHBoxLayout* layout = new QHBoxLayout();
    layout->setContentsMargins(0, 0, 0, 0);
    QLabel* label = new QLabel(index.data(Qt::DisplayRole).toString(), editor);
    QPushButton* addButton = new QPushButton("+", editor);
    addButton->setProperty("itemText", index.data(Qt::DisplayRole).toString());
    QPushButton* deleteButton = new QPushButton("-", editor);
    deleteButton->setProperty("itemText", index.data(Qt::DisplayRole).toString());
    layout->addWidget(label);
    layout->addWidget(addButton);
    layout->addWidget(deleteButton);
    editor->setLayout(layout);
    return editor;
}
void TextButtonDelegate::setEditorData(QWidget* editor, const QModelIndex& index) const
{
    // You can set data for the editor if needed
}
void TextButtonDelegate::setModelData(QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const
{
    // You can set model data if needed
}
void TextButtonDelegate::updateEditorGeometry(QWidget* editor, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    editor->setGeometry(option.rect);
}
bool TextButtonDelegate::editorEvent(QEvent* event, QAbstractItemModel* model, const QStyleOptionViewItem& option, const QModelIndex& index)
{
    Q_UNUSED(model);
    if (event->type() == QEvent::MouseButtonPress)
    {
        return true;
    }
    return false;
}
// CustomComboBox.cpp file
#include "CustomComboBox.h"
#include <QAbstractItemView>
CustomComboBox::CustomComboBox(QWidget* parent) : QComboBox(parent)
{
    // Set to editable state
    setEditable(true);
    // Get the underlying QAbstractItemView object
    QAbstractItemView* itemView = view();
    // Set edit triggers
    if (itemView)
    {
        //qDebug() << "itemView ------- CustomComboBox::CustomComboBox(QWidget* parent) : QComboBox(parent) ";
        itemView->setEditTriggers(QAbstractItemView::DoubleClicked | QAbstractItemView::SelectedClicked);
    }
    // Create TextButtonDelegate
    textButtonDelegate = new TextButtonDelegate();
    // Create a standard item model
    model = new QStandardItemModel();
    // Set the model for the combo box
    setModel(model);
    // Set size policy
    setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
    // Set delegate
    setItemDelegate(textButtonDelegate);
}
void CustomComboBox::setupItem(const QString &text)
{
    item = new QStandardItem(text);
    item->setFlags(item->flags() | Qt::ItemIsEditable);  // Add the ItemIsEditable flag
    // Add the item to the model
    model->appendRow(item);
    // Set data for the item
    model->setData(model->index(model->rowCount() - 1, 0), text, Qt::DisplayRole);
}
// main.cpp file
#include <QApplication>
#include <QMainWindow>
#include <QWidget>
#include <QHBoxLayout>
#include "CustomComboBox.h"
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    // Create the main window
    QMainWindow* mainWindow = new QMainWindow();
    // Create a QWidget as the central widget of the main window
    QWidget* widget = new QWidget();
    // Create CustomComboBox
    CustomComboBox* customComboBox = new CustomComboBox();
    // Add items
    for (int i = 1; i <= 5; ++i)
    {
        customComboBox->setupItem("Item " + QString::number(i));
    }
    // Create a horizontal layout
    QHBoxLayout* layout = new QHBoxLayout(widget);
    layout->addWidget(customComboBox);
    // Set the layout as the layout of the central widget
    widget->setLayout(layout);
    // Set the central widget of the main window
    mainWindow->setCentralWidget(widget);
    // Set the size and title of the main window
    mainWindow->setGeometry(100, 100, 400, 200);
    mainWindow->setWindowTitle("CustomComboBox Demo");
    // Show the main window
    mainWindow->show();
    // Run the application event loop
    return app.exec();
}

[SGaist]

Hi,

AFAIK, the selection model's currentChanged signal is connected for the combo box to work so it might just be that your edit triggers are shorted by this.

Note that editing the content of a QComboBox dropdown would be pretty counter intuitive. What is your goal with that paradigm ?