QTfrontend/ui/widget/HistoryLineEdit.h
author unc0rr
Sun, 02 Dec 2012 01:25:11 +0400
changeset 8178 8bd087478b48
parent 6952 7f70f37bbf08
child 9080 9b42757d7e71
permissions -rw-r--r--
Fix QSettings problems: - Reopen file in ReadOnly mode if it was open in ReadWrite mode and is being read. This is needed for stupid QSettings which opens file in ReadWrite mode just to call readAll() on it. - Implement setSize(0)
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2006-2007 Igor Ulyanov <iulyanov@gmail.com>
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 * Copyright (c) 2004-2012 Andrey Korotaev <unC0Rr@gmail.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; version 2 of the License
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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 Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 */
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/**
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 * @file
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 * @brief HistoryLineEdit class definition
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 */
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#ifndef HEDGEWARS_HISTORYLINEEDIT
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#define HEDGEWARS_HISTORYLINEEDIT
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#include <QStringList>
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#include <QString>
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#include <QLineEdit>
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#include <QKeyEvent>
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class QLineEdit;
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/**
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 * @brief <code>QLineEdit</code> that features a history of previous contents,
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 *        re-selectable using the arrow keys.
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 *
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 * @author sheepluva
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 * @since 0.9.17
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 */
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class HistoryLineEdit : public QLineEdit
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{
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        Q_OBJECT
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    public:
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        /**
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        * @brief Class constructor.
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        * @param parent parent QWidget.
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        * @param maxHistorySize maximum amount of history entries kept.
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        */
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        HistoryLineEdit(QWidget * parent = 0, int maxHistorySize = 64);
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        /**
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        * @brief Class destructor.
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        */
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        ~HistoryLineEdit();
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        /**
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         * @brief Appends current text to history (if not only whitespaces);
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         */
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        void rememberCurrentText();
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        /**
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         * @brief Forget all history.
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         */
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        void reset();
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    public slots:
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        /**
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         * @brief Clears the contents.
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         */
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        void clear();
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    protected:
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        /**
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         * @brief Overrides method of parent class.
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         * Arrow keys are used for navigating the history.
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         *
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         * All other keys are forwarded to the parent's method.
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         *
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         * @param event the key event.
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         */
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        virtual void keyPressEvent(QKeyEvent * event);
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    private:
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        int m_maxHistorySize; ///< the maximum allowed size for the history
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        int m_curHistEntryIdx; ///< the index of the displayed used entry
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        QStringList * m_history; ///< history of previous inputs
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        /**
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         * @brief Navigates content history in the desired direction.
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         *
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         * Note: no wrap-around on purpose (so that holding down/up will get the
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         * the user to the respective end rather than into an endless cycle :P)
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         *
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         * @param isGoingUp true: next older entry, false: next more recent entry.
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         */
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        void navigateHistory(bool isGoingUp);
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};
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#endif // HEDGEWARS_HISTORYLINEEDIT