Files
bitcoin/src/qt
merge-script dec68f997e Merge bitcoin/bitcoin#35852: scripted-diff: Use inline const(expr) over static constexpr in headers
fab74a0e92 refactor: Use C++14 digit separator for large int literals (MarcoFalke)
fae759be79 scripted-diff: Use inline constexpr over plain constexpr (MarcoFalke)
fa74f58a26 scripted-diff: Use inline const over (static) const (MarcoFalke)
fab1a62c87 refactor: Use inline constexpr for string literals in headers (MarcoFalke)
fa08bbed8d contrib: Adjust generate-seeds.py to write inline constexpr (MarcoFalke)
fad753611b scripted-diff: Use inline constexpr over (static) const (MarcoFalke)
faedb52583 refactor: Make CFeeRate(integral) ctor constexpr (MarcoFalke)
5555d5dcb5 scripted-diff: Use inline constexpr over static constexpr (MarcoFalke)
fa6e1a1e85 refactor: Remove static from constexpr functions in headers (MarcoFalke)

Pull request description:

  Both are fine and this refactor doesn't change any behavior.

  However, `inline constexpr` from C++17 will ensure each symbol has a single address
  across all TU, making the release binary minimally smaller. (For me it is smaller by about 1kB)

ACKs for top commit:
  l0rinc:
    reACK fab74a0e92
  rustaceanrob:
    ACK fab74a0e92
  hebasto:
    ACK fab74a0e92, I have reviewed the code and it looks OK.

Tree-SHA512: 6ec94136c12bcbf696812d0661c9857318a69e367c79fc00b9ca0b4068f269d10e5548d95c9ba2070225308c12d7a54fe8cb8447de7e0979cba99f48892b35f9
2026-08-14 17:29:46 +01:00
..
2025-05-19 16:40:33 +01:00
2025-05-19 16:40:33 +01:00
2026-05-13 20:46:32 +02:00

This directory contains the source code for the Bitcoin Core graphical user interface (GUI). It uses the Qt cross-platform framework.

The current precise version for Qt is specified in qt_details.mk.

Compile and run

See build instructions: Unix, macOS, Windows, FreeBSD, NetBSD, OpenBSD

When following your systems build instructions, make sure to install the Qt dependencies.

To run:

./build/bin/bitcoin-qt

Files and Directories

forms/

  • A directory that contains Designer UI files. These files specify the characteristics of form elements in XML. Qt UI files can be edited with Qt Creator or using any text editor.

locale/

  • Contains translations. They are periodically updated and an effort is made to support as many languages as possible. The process of contributing translations is described in doc/translation_process.md.

res/

  • Contains graphical resources used to enhance the UI experience.

test/

  • Functional tests used to ensure proper functionality of the GUI. Significant changes to the GUI code normally require new or updated tests.

bitcoingui.(h/cpp)

  • Represents the main window of the Bitcoin UI.

*model.(h/cpp)

  • The model. When it has a corresponding controller, it generally inherits from QAbstractTableModel. Models that are used by controllers as helpers inherit from other Qt classes like QValidator.
  • ClientModel is used by the main application bitcoingui and several models like peertablemodel.

*page.(h/cpp)

  • A controller. :NAMEpage.cpp generally includes :NAMEmodel.h and forms/:NAME.page.ui with a similar :NAME.

*dialog.(h/cpp)

  • Various dialogs, e.g. to open a URL. Inherit from QDialog.

paymentserver.(h/cpp)

  • (Deprecated) Used to process BIP21 payment URI requests. Also handles URI-based application switching (e.g. when following a bitcoin:... link from a browser).

walletview.(h/cpp)

  • Represents the view to a single wallet.

Other .h/cpp files

  • UI elements like BitcoinAmountField, which inherit from QWidget.
  • bitcoinstrings.cpp: automatically generated
  • bitcoinunits.(h/cpp): BTC / mBTC / etc. handling
  • callback.h
  • guiconstants.h: UI colors, app name, etc.
  • guiutil.h: several helper functions
  • macdockiconhandler.(h/mm): macOS dock icon handler
  • macnotificationhandler.(h/mm): display notifications in macOS

Contribute

See CONTRIBUTING.md for general guidelines.

Note: Do not change local/bitcoin_en.ts. It is updated automatically.

Using Qt Creator as an IDE

Qt Creator is a powerful tool which packages a UI designer tool (Qt Designer) and a C++ IDE into one application. This is especially useful if you want to change the UI layout.

Download Qt Creator

On Unix and macOS, Qt Creator can be installed through your package manager. Alternatively, you can download a binary from the Qt Website.

Note: If installing from a binary grabbed from the Qt Website: During the installation process, uncheck everything except for Qt Creator.

macOS
brew install qt-creator
Ubuntu & Debian
sudo apt-get install qtcreator

Setup Qt Creator

  1. Make sure you've installed all dependencies specified in your systems build instructions
  2. Follow the compile instructions for your system, adding the -DCMAKE_BUILD_TYPE=Debug build flag
  3. Start Qt Creator. At the start page, do: New -> Import Project -> Import Existing Project
  4. Enter bitcoin-qt as the Project Name and enter the absolute path to src/qt as Location
  5. Check over the file selection, you may need to select the forms directory (necessary if you intend to edit *.ui files)
  6. Confirm the Summary page
  7. In the Projects tab, select Manage Kits...

macOS

  • Under Kits: select the default "Desktop" kit
  • Under Compilers: select "Clang (x86 64bit in /usr/bin)"
  • Under Debuggers: select "LLDB" as debugger (you might need to set the path to your LLDB installation)

Ubuntu & Debian

Note: Some of these options may already be set

  • Under Kits: select the default "Desktop" kit
  • Under Compilers: select "GCC (x86 64bit in /usr/bin)"
  • Under Debuggers: select "GDB" as debugger
  1. While in the Projects tab, ensure that you have the bitcoin-qt executable specified under Run
  • If the executable is not specified: click "Choose...", navigate to build/bin, and select bitcoin-qt
  1. You're all set! Start developing, building, and debugging the Bitcoin Core GUI