File indexing completed on 2024-04-14 03:54:02

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 2003 Scott Wheeler <wheeler@kde.org>
     SPDX-FileCopyrightText: 2005 Rafal Rzepecki <divide@users.sourceforge.net>
     SPDX-FileCopyrightText: 2006 Hamish Rodda <rodda@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-only
 */
 
 #ifndef KTREEWIDGETSEARCHLINE_H
 #define KTREEWIDGETSEARCHLINE_H
 
 #include <QLineEdit>
 #include <kitemviews_export.h>
 #include <memory>
 
 class QModelIndex;
 class QTreeWidget;
 class QTreeWidgetItem;
 
 /**
  * @class KTreeWidgetSearchLine ktreewidgetsearchline.h KTreeWidgetSearchLine
  *
  * This class makes it easy to add a search line for filtering the items in
  * listviews based on a simple text search.
  *
  * No changes to the application other than instantiating this class with
  * appropriate QTreeWidgets should be needed.
  */
 
 class KITEMVIEWS_EXPORT KTreeWidgetSearchLine : public QLineEdit
 {
     Q_OBJECT
 
     Q_PROPERTY(Qt::CaseSensitivity caseSensitity READ caseSensitivity WRITE setCaseSensitivity NOTIFY caseSensitivityChanged)
     Q_PROPERTY(bool keepParentsVisible READ keepParentsVisible WRITE setKeepParentsVisible NOTIFY keepParentsVisibleChanged)
 
 public:
     /**
      * Constructs a KTreeWidgetSearchLine with \a treeWidget being the QTreeWidget to
      * be filtered.
      *
      * If \a treeWidget is null then the widget will be disabled until listviews
      * are set with setTreeWidget(), setTreeWidgets() or added with addTreeWidget().
      */
     explicit KTreeWidgetSearchLine(QWidget *parent = nullptr, QTreeWidget *treeWidget = nullptr);
 
     /**
      * Constructs a KTreeWidgetSearchLine with \a treeWidgets being the list of
      * pointers to QTreeWidgets to be filtered.
      *
      * If \a treeWidgets is empty then the widget will be disabled until listviews
      * are set with setTreeWidget(), setTreeWidgets() or added with addTreeWidget().
      */
     KTreeWidgetSearchLine(QWidget *parent, const QList<QTreeWidget *> &treeWidgets);
 
     /**
      * Destroys the KTreeWidgetSearchLine.
      */
     ~KTreeWidgetSearchLine() override;
 
     /**
      * Returns true if the search is case sensitive.  This defaults to false.
      *
      * @see setCaseSensitive()
      */
     Qt::CaseSensitivity caseSensitivity() const;
 
     /**
      * Returns the current list of columns that will be searched.  If the
      * returned list is empty all visible columns will be searched.
      *
      * @see setSearchColumns
      */
     QList<int> searchColumns() const;
 
     /**
      * If this is true (the default) then the parents of matched items will also
      * be shown.
      *
      * @see setKeepParentsVisible()
      */
     bool keepParentsVisible() const;
 
     /**
      * Returns the listview that is currently filtered by the search.
      * If there are multiple listviews filtered, it returns 0.
      *
      * @see setTreeWidget(), treeWidgets()
      */
     QTreeWidget *treeWidget() const;
 
     /**
      * Returns the list of pointers to listviews that are currently filtered by
      * the search.
      *
      * @see setTreeWidgets(), addTreeWidget(), treeWidget()
      */
     QList<QTreeWidget *> treeWidgets() const;
 
 Q_SIGNALS:
     /**
      * This signal is emitted whenever an item gets hidden or unhidden due
      * to it not matching or matching the search string.
      */
     void hiddenChanged(QTreeWidgetItem *, bool);
 
     /**
      * This signal is emitted when user finished entering filter text or
      * when he made a pause long enough, after the QTreeWidget items got filtered
      * @param searchString is the text currently entered by the user
      * @since 5.0
      */
     void searchUpdated(const QString &searchString);
 
     void caseSensitivityChanged(Qt::CaseSensitivity caseSensitivity);
     void keepParentsVisibleChanged(bool keepParentsVisible);
 
 public Q_SLOTS:
     /**
      * Adds a QTreeWidget to the list of listviews filtered by this search line.
      * If \a treeWidget is null then the widget will be disabled.
      *
      * @see treeWidget(), setTreeWidgets(), removeTreeWidget()
      */
     void addTreeWidget(QTreeWidget *treeWidget);
 
     /**
      * Removes a QTreeWidget from the list of listviews filtered by this search
      * line. Does nothing if \a treeWidget is 0 or is not filtered by the quick search
      * line.
      *
      * @see listVew(), setTreeWidgets(), addTreeWidget()
      */
     void removeTreeWidget(QTreeWidget *treeWidget);
 
     /**
      * Updates search to only make visible the items that match \a pattern.  If
      * \a s is null then the line edit's text will be used.
      */
     virtual void updateSearch(const QString &pattern = QString());
 
     /**
      * Make the search case sensitive or case insensitive.
      *
      * @see caseSenstivity()
      */
     void setCaseSensitivity(Qt::CaseSensitivity caseSensitivity);
 
     /**
      * When a search is active on a list that's organized into a tree view if
      * a parent or ancesestor of an item is does not match the search then it
      * will be hidden and as such so too will any children that match.
      *
      * If this is set to true (the default) then the parents of matching items
      * will be shown.
      *
      * \warning setKeepParentsVisible(true) does not have the expected effect
      * on items being added to or removed from the view while a search is active.
      * When a new search starts afterwards the behavior will be normal.
      *
      * @see keepParentsVisible
      */
     void setKeepParentsVisible(bool value);
 
     /**
      * Sets the list of columns to be searched.  The default is to search all,
      * visible columns which can be restored by passing \a columns as an empty
      * list.
      * If listviews to be filtered have different numbers or labels of columns
      * this method has no effect.
      *
      * @see searchColumns
      */
     void setSearchColumns(const QList<int> &columns);
 
     /**
      * Sets the QTreeWidget that is filtered by this search line, replacing any
      * previously filtered listviews.  If \a treeWidget is null then the widget will be
      * disabled.
      *
      * @see treeWidget(), setTreeWidgets()
      */
     void setTreeWidget(QTreeWidget *treeWidget);
 
     /**
      * Sets QTreeWidgets that are filtered by this search line, replacing any
      * previously filtered listviews.  If \a treeWidgets is empty then the widget will
      * be disabled.
      *
      * @see treeWidgets(), addTreeWidget(), setTreeWidget()
      */
     void setTreeWidgets(const QList<QTreeWidget *> &treeWidgets);
 
 protected:
     /**
      * Returns true if \a item matches the search \a pattern.  This will be evaluated
      * based on the value of caseSensitive().  This can be overridden in
      * subclasses to implement more complicated matching schemes.
      */
     virtual bool itemMatches(const QTreeWidgetItem *item, const QString &pattern) const;
 
     /**
      * Re-implemented for internal reasons.  API not affected.
      */
     void contextMenuEvent(QContextMenuEvent *) override;
 
     /**
      * Updates search to only make visible appropriate items in \a treeWidget.  If
      * \a treeWidget is null then nothing is done.
      */
     virtual void updateSearch(QTreeWidget *treeWidget);
 
     /**
      * Connects signals of this listview to the appropriate slots of the search
      * line.
      */
     virtual void connectTreeWidget(QTreeWidget *);
 
     /**
      * Disconnects signals of a listviews from the search line.
      */
     virtual void disconnectTreeWidget(QTreeWidget *);
 
     /**
      * Checks columns in all listviews and decides whether choosing columns to
      * filter on makes any sense.
      *
      * Returns false if either of the following is true:
      * * there are no listviews connected,
      * * the listviews have different numbers of columns,
      * * the listviews have only one column,
      * * the listviews differ in column labels.
      *
      * Otherwise it returns true.
      *
      * @see setSearchColumns()
      */
     virtual bool canChooseColumnsCheck();
 
     /**
      * Re-implemented for internal reasons.  API not affected.
      */
     bool event(QEvent *event) override;
 
 private:
     friend class KTreeWidgetSearchLinePrivate;
     std::unique_ptr<class KTreeWidgetSearchLinePrivate> const d;
 
     Q_PRIVATE_SLOT(d, void _k_rowsInserted(const QModelIndex &, int, int) const)
     Q_PRIVATE_SLOT(d, void _k_treeWidgetDeleted(QObject *))
     Q_PRIVATE_SLOT(d, void _k_slotColumnActivated(QAction *))
     Q_PRIVATE_SLOT(d, void _k_slotAllVisibleColumns())
     Q_PRIVATE_SLOT(d, void _k_queueSearch(const QString &))
     Q_PRIVATE_SLOT(d, void _k_activateSearch())
 };
 
 #endif