File indexing completed on 2024-05-19 05:42:25

 #include <ct_lvtqtd_removedelegate.h>
 
 /*
 // Copyright 2023 Codethink Ltd <codethink@codethink.co.uk>
 // SPDX-License-Identifier: Apache-2.0
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 */
 
 #include <QApplication>
 #include <QDebug>
 #include <QModelIndex>
 #include <QMouseEvent>
 #include <QPainter>
 #include <QStyleOptionViewItem>
 
 namespace Codethink::lvtqtd {
 struct RemoveDelegate::Private { };
 
 RemoveDelegate::RemoveDelegate(QObject *parent):
     QStyledItemDelegate(parent), d(std::make_unique<RemoveDelegate::Private>())
 {
 }
 
 RemoveDelegate::~RemoveDelegate() noexcept = default;
 
 void RemoveDelegate::paint(QPainter *painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
 {
     QStyledItemDelegate::paint(painter, option, index);
     if (!index.isValid()) {
         return;
     }
 
     /////////////////////////////////////////////////////////////////
     //     I have a Rect on the QComboBox like this:
     //     ########################
     //     # TEXT HERE            #
     //     ########################
     //
     //     and I want to put a button on the right side of the box,
     //     since I want the button to be a square, I use the height
     //     dimensions for it.
     //     This will generate a button like
     //
     //     ####
     //     #  #
     //     ####
     //
     //    now I need to tell the painter where to paint this.
     //    For this, I get the option.rect (that gives me the full rect)
     //    the new X of this rect will be the starting point of this button,
     //    that's x() + (width() - buttonWidth()) - but the buttonWidth is
     //    the same as the rect.height()
     //    So I end up with
     //
     //    #########################
     //    # TEXT HERE          #  #
     //    #########################
     ////////////////////////////////////////////////////////////////////
 
     QRect rect = option.rect.adjusted(1, 1, -1, -1);
     rect.setX(rect.x() + rect.width() - rect.height());
     rect.setWidth(rect.height());
 
     QStyleOptionButton opt;
     opt.state |= QStyle::State_Enabled;
     opt.rect = rect;
     opt.text = QStringLiteral("X");
     QApplication::style()->drawControl(QStyle::CE_PushButton, &opt, painter, nullptr);
 }
 
 bool RemoveDelegate::editorEvent(QEvent *event,
                                  QAbstractItemModel *model,
                                  const QStyleOptionViewItem& option,
                                  const QModelIndex& index)
 {
     if (event->type() == QEvent::MouseButtonPress || event->type() == QEvent::MouseButtonDblClick) {
         auto *mouseEvent = dynamic_cast<QMouseEvent *>(event);
         const auto pos = mouseEvent->localPos().toPoint();
 
         QRect rect = option.rect.adjusted(1, 1, -1, -1);
         rect.setX(rect.x() + rect.width() - rect.height());
         rect.setWidth(rect.height());
 
         if (rect.contains(pos)) {
             model->removeRow(index.row());
             return true; // event is handled.
         }
     }
 
     return QStyledItemDelegate::editorEvent(event, model, option, index);
 }
 } // namespace Codethink::lvtqtd