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_INTRO_H
6#define BITCOIN_QT_INTRO_H
7
8#include <qt/freespacechecker.h>
9
10#include <QDialog>
11#include <QMutex>
12#include <QThread>
13
14inline constexpr bool DEFAULT_CHOOSE_DATADIR = false;
15
16namespace interfaces {
17    class Node;
18}
19
20namespace Ui {
21    class Intro;
22}
23
24/** Introduction screen (pre-GUI startup).
25  Allows the user to choose a data directory,
26  in which the wallet and block chain will be stored.
27 */
28class Intro : public QDialog, public FreespaceChecker::PathQuery
29{
30    Q_OBJECT
31
32public:
33    explicit Intro(QWidget *parent = nullptr,
34                   int64_t blockchain_size_gb = 0, int64_t chain_state_size_gb = 0);
35    ~Intro();
36
37    QString getDataDirectory();
38    void setDataDirectory(const QString &dataDir);
39    int64_t getPruneMiB() const;
40
41    /**
42     * Determine data directory. Let the user choose if the current one doesn't exist.
43     * Let the user configure additional preferences such as pruning.
44     *
45     * @returns true if a data directory was selected, false if the user cancelled the selection
46     * dialog.
47     *
48     * @note do NOT call global gArgs.GetDataDirNet() before calling this function, this
49     * will cause the wrong path to be cached.
50     */
51    static bool showIfNeeded(bool& did_show_intro, int64_t& prune_MiB);
52
53Q_SIGNALS:
54    void requestCheck();
55
56public Q_SLOTS:
57    void setStatus(int status, const QString &message, quint64 bytesAvailable);
58
59private Q_SLOTS:
60    void on_dataDirectory_textChanged(const QString &arg1);
61    void on_ellipsisButton_clicked();
62    void on_dataDirDefault_clicked();
63    void on_dataDirCustom_clicked();
64
65private:
66    Ui::Intro *ui;
67    bool m_prune_checkbox_is_default{true};
68    QThread* thread{nullptr};
69    QMutex mutex;
70    bool signalled{false};
71    QString pathToCheck;
72    const int64_t m_blockchain_size_gb;
73    const int64_t m_chain_state_size_gb;
74    //! Total required space (in GB) depending on user choice (prune or not prune).
75    int64_t m_required_space_gb{0};
76    uint64_t m_bytes_available{0};
77    int64_t m_prune_target_gb;
78
79    void startThread();
80    void checkPath(const QString &dataDir);
81    QString getPathToCheck() override;
82    void UpdatePruneLabels(bool prune_checked);
83    void UpdateFreeSpaceLabel();
84
85    friend class FreespaceChecker;
86};
87
88#endif // BITCOIN_QT_INTRO_H
89