QTfrontend/ui/widget/HistoryLineEdit.h
author Wuzzy <Wuzzy2@mail.ru>
Wed, 25 Oct 2017 23:09:41 +0200
changeset 12763 ad67a3804981
parent 11046 47a8c19ecb60
permissions -rw-r--r--
Fix sometimes ammo schemes not being saved after changing before an ammo scheme got deleted in session This was because the bool isDeleting is not initialized, so its initial value is unpredictable. Which means there's chance it starts with true, confusing the frontend.
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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) 2004-2015 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  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