Inside Bitcoin

1// Copyright (c) 2011-present The Bitcoin Core developers
2// Distributed under the MIT software license, see the accompanying
3// file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5#ifndef BITCOIN_QT_BITCOINAMOUNTFIELD_H
6#define BITCOIN_QT_BITCOINAMOUNTFIELD_H
7
8#include <consensus/amount.h>
9#include <qt/bitcoinunits.h>
10
11#include <QWidget>
12
13class AmountSpinBox;
14
15QT_BEGIN_NAMESPACE
16class QValueComboBox;
17QT_END_NAMESPACE
18
19/** Widget for entering bitcoin amounts.
20  */
21class BitcoinAmountField: public QWidget
22{
23    Q_OBJECT
24
25    // ugly hack: for some unknown reason CAmount (instead of qint64) does not work here as expected
26    // discussion: https://github.com/bitcoin/bitcoin/pull/5117
27    Q_PROPERTY(qint64 value READ value WRITE setValue NOTIFY valueChanged USER true)
28
29public:
30    explicit BitcoinAmountField(QWidget *parent = nullptr);
31
32    CAmount value(bool *value=nullptr) const;
33    void setValue(const CAmount& value);
34
35    /** If allow empty is set to false the field will be set to the minimum allowed value if left empty. **/
36    void SetAllowEmpty(bool allow);
37
38    /** Set the minimum value in satoshis **/
39    void SetMinValue(const CAmount& value);
40
41    /** Set the maximum value in satoshis **/
42    void SetMaxValue(const CAmount& value);
43
44    /** Set single step in satoshis **/
45    void setSingleStep(const CAmount& step);
46
47    /** Make read-only **/
48    void setReadOnly(bool fReadOnly);
49
50    /** Mark current value as invalid in UI. */
51    void setValid(bool valid);
52    /** Perform input validation, mark field as invalid if entered value is not valid. */
53    bool validate();
54
55    /** Change unit used to display amount. */
56    void setDisplayUnit(BitcoinUnit new_unit);
57
58    /** Make field empty and ready for new input. */
59    void clear();
60
61    /** Enable/Disable. */
62    void setEnabled(bool fEnabled);
63
64    /** Qt messes up the tab chain by default in some cases (issue https://bugreports.qt-project.org/browse/QTBUG-10907),
65        in these cases we have to set it up manually.
66    */
67    QWidget *setupTabChain(QWidget *prev);
68
69Q_SIGNALS:
70    void valueChanged();
71
72protected:
73    /** Intercept focus-in event and ',' key presses */
74    bool eventFilter(QObject *object, QEvent *event) override;
75
76private:
77    AmountSpinBox* amount{nullptr};
78    QValueComboBox *unit;
79
80private Q_SLOTS:
81    void unitChanged(int idx);
82
83};
84
85#endif // BITCOIN_QT_BITCOINAMOUNTFIELD_H
86