/*
 * This file is part of the Flowee project
 * Copyright (C) 2011-2015 The Bitcoin Core developers
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef FLOWEE_QT_BITCOINAMOUNTFIELD_H
#define FLOWEE_QT_BITCOINAMOUNTFIELD_H

#include "amount.h"

#include <QWidget>

class AmountSpinBox;

QT_BEGIN_NAMESPACE
class QValueComboBox;
QT_END_NAMESPACE

/** Widget for entering bitcoin amounts.
  */
class BitcoinAmountField: public QWidget
{
    Q_OBJECT

    // ugly hack: for some unknown reason int64_t (instead of qint64) does not work here as expected
    // discussion: https://github.com/bitcoin/bitcoin/pull/5117
    Q_PROPERTY(qint64 value READ value WRITE setValue NOTIFY valueChanged USER true)

public:
    explicit BitcoinAmountField(QWidget *parent = 0);

    int64_t value(bool *value=0) const;
    void setValue(const int64_t& value);

    /** Set single step in satoshis **/
    void setSingleStep(const int64_t& step);

    /** Make read-only **/
    void setReadOnly(bool fReadOnly);

    /** Mark current value as invalid in UI. */
    void setValid(bool valid);
    /** Perform input validation, mark field as invalid if entered value is not valid. */
    bool validate();

    /** Change unit used to display amount. */
    void setDisplayUnit(int unit);

    /** Make field empty and ready for new input. */
    void clear();

    /** Enable/Disable. */
    void setEnabled(bool fEnabled);

    /** Qt messes up the tab chain by default in some cases (issue https://bugreports.qt-project.org/browse/QTBUG-10907),
        in these cases we have to set it up manually.
    */
    QWidget *setupTabChain(QWidget *prev);

Q_SIGNALS:
    void valueChanged();

protected:
    /** Intercept focus-in event and ',' key presses */
    bool eventFilter(QObject *object, QEvent *event);

private:
    AmountSpinBox *amount;
    QValueComboBox *unit;

private Q_SLOTS:
    void unitChanged(int idx);

};

#endif