mirror of
https://invent.kde.org/system/dolphin
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89 lines
3.2 KiB
C++
89 lines
3.2 KiB
C++
/***************************************************************************
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* Copyright (C) 2008 by Simon St James <kdedevel@etotheipiplusone.com> *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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***************************************************************************/
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#ifndef FOLDEREXPANDER_H
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#define FOLDEREXPANDER_H
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// Needs to be exported as FoldersPanel uses it.
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#include "libdolphin_export.h"
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#include <QObject>
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#include <QPoint>
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class QAbstractItemView;
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class QTreeView;
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class QTimer;
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class QSortFilterProxyModel;
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class QModelIndex;
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/**
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* Grants auto expanding functionality to the provided item view.
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* Qt has its own auto expand mechanism, but this works only
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* for QTreeView. Auto expanding of folders is turned on
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* per default.
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*
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* If the provided view is an instance of the class QTreeView, the
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* expansion of the directory is automatically done on hover. Otherwise
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* the enterDir() signal is emitted and the caller needs to ensure that
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* the requested directory is entered.
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*
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* The FolderExpander becomes a child of the provided view.
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*/
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class LIBDOLPHINPRIVATE_EXPORT FolderExpander : public QObject
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{
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Q_OBJECT
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public:
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FolderExpander(QAbstractItemView* view, QSortFilterProxyModel* proxyModel);
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virtual ~FolderExpander();
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void setEnabled(bool enabled);
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bool enabled() const;
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signals:
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/**
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* Is emitted if the directory \a dirModelIndex should be entered. The
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* signal is not emitted when a QTreeView is used, as the entering of
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* the directory is already provided by expanding the tree node.
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*/
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void enterDir(const QModelIndex& dirModelIndex);
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private slots:
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void viewScrolled();
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void autoExpandTimeout();
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private:
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bool m_enabled;
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QAbstractItemView* m_view;
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QSortFilterProxyModel* m_proxyModel;
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QTimer* m_autoExpandTriggerTimer;
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QPoint m_autoExpandPos;
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static const int AUTO_EXPAND_DELAY = 700;
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/**
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* Watchs the drag/move events for the view to decide
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* whether auto expanding of a folder should be triggered.
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*/
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bool eventFilter(QObject* watched, QEvent* event);
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};
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#endif
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