File indexing completed on 2024-04-28 17:06:04

 /*
     SPDX-FileCopyrightText: 2018-2020 Shie Erlich <krusader@users.sourceforge.net>
     SPDX-FileCopyrightText: 2018-2020 Rafi Yanai <krusader@users.sourceforge.net>
     SPDX-FileCopyrightText: 2018-2022 Krusader Krew <https://krusader.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "krhistorycombobox.h"
 
 // QtCore
 #include <QEvent>
 // QtGui
 #include <QKeyEvent>
 // QtWidgets
 #include <QAbstractItemView>
 
 /**
  *  A KrHistoryComboBox event filter that e.g. deletes the current item when Shift+Del is pressed
  *  There was more information in https://doc.qt.io/qt-5/qobject.html#installEventFilter,
  *  https://forum.qt.io/post/160618 and
  *  https://stackoverflow.com/questions/17820947/remove-items-from-qcombobox-from-ui/52459337#52459337
  */
 class KHBoxEventFilter : public QObject
 {
     Q_OBJECT
 
 public:
     explicit KHBoxEventFilter(QObject *parent = nullptr)
         : QObject(parent)
     {
     }
 
 protected:
     bool eventFilter(QObject *obj, QEvent *event) override;
 };
 
 bool KHBoxEventFilter::eventFilter(QObject *obj, QEvent *event)
 {
     if (event->type() == QEvent::KeyPress) {
         auto keyEvent = static_cast<QKeyEvent *>(event);
         if (keyEvent->modifiers() == Qt::ShiftModifier && keyEvent->key() == Qt::Key::Key_Delete) {
             auto comboBox = qobject_cast<KHistoryComboBox *>(obj);
             if (comboBox != nullptr) {
                 QString entryToDelete = comboBox->currentText();
                 // Delete the current item
                 comboBox->removeItem(comboBox->currentIndex());
                 // The item has to be deleted also from the completion list
                 comboBox->completionObject()->removeItem(entryToDelete);
                 return true;
             }
         }
     }
     // Perform the usual event processing
     return QObject::eventFilter(obj, event);
 }
 
 /**
  *  An event filter for the popup list of a KrHistoryComboBox, e.g. it deletes the current
  *  item when the user presses Shift+Del
  */
 class KHBoxListEventFilter : public QObject
 {
     Q_OBJECT
 
 public:
     explicit KHBoxListEventFilter(QObject *parent = nullptr)
         : QObject(parent)
     {
     }
 
 protected:
     bool eventFilter(QObject *obj, QEvent *event) override;
 };
 
 bool KHBoxListEventFilter::eventFilter(QObject *obj, QEvent *event)
 {
     if (event->type() == QEvent::KeyPress) {
         auto keyEvent = static_cast<QKeyEvent *>(event);
         if (keyEvent->modifiers() == Qt::ShiftModifier && keyEvent->key() == Qt::Key::Key_Delete) {
             auto itemView = qobject_cast<QAbstractItemView *>(obj);
             if (itemView->model() != nullptr) {
                 QString entryToDelete = itemView->currentIndex().data().toString();
                 // Delete the current item from the popup list
                 itemView->model()->removeRow(itemView->currentIndex().row());
                 // The item has to be deleted also from the completion list of the KHistoryComboBox
                 if (itemView->parent() != nullptr) {
                     auto comboBox = qobject_cast<KHistoryComboBox *>(itemView->parent()->parent());
                     if (comboBox != nullptr) {
                         comboBox->completionObject()->removeItem(entryToDelete);
                         return true;
                     }
                 }
             }
         }
     }
     // Perform the usual event processing
     return QObject::eventFilter(obj, event);
 }
 
 #include "krhistorycombobox.moc" // required for class definitions with Q_OBJECT macro in implementation files
 
 KrHistoryComboBox::KrHistoryComboBox(bool useCompletion, QWidget *parent)
     : KHistoryComboBox(useCompletion, parent)
 {
     installEventFilter(new KHBoxEventFilter(this));
 
     QAbstractItemView *itemView = view();
     if (itemView != nullptr)
         itemView->installEventFilter(new KHBoxListEventFilter(this));
 }