diff options
Diffstat (limited to 'windows/runner')
| -rw-r--r-- | windows/runner/CMakeLists.txt | 40 | ||||
| -rw-r--r-- | windows/runner/Runner.rc | 121 | ||||
| -rw-r--r-- | windows/runner/flutter_window.cpp | 71 | ||||
| -rw-r--r-- | windows/runner/flutter_window.h | 33 | ||||
| -rw-r--r-- | windows/runner/main.cpp | 43 | ||||
| -rw-r--r-- | windows/runner/resource.h | 16 | ||||
| -rw-r--r-- | windows/runner/resources/app_icon.ico | bin | 0 -> 33772 bytes | |||
| -rw-r--r-- | windows/runner/runner.exe.manifest | 20 | ||||
| -rw-r--r-- | windows/runner/utils.cpp | 65 | ||||
| -rw-r--r-- | windows/runner/utils.h | 19 | ||||
| -rw-r--r-- | windows/runner/win32_window.cpp | 288 | ||||
| -rw-r--r-- | windows/runner/win32_window.h | 102 |
12 files changed, 818 insertions, 0 deletions
diff --git a/windows/runner/CMakeLists.txt b/windows/runner/CMakeLists.txt new file mode 100644 index 0000000..394917c --- /dev/null +++ b/windows/runner/CMakeLists.txt @@ -0,0 +1,40 @@ +cmake_minimum_required(VERSION 3.14) +project(runner LANGUAGES CXX) + +# Define the application target. To change its name, change BINARY_NAME in the +# top-level CMakeLists.txt, not the value here, or `flutter run` will no longer +# work. +# +# Any new source files that you add to the application should be added here. +add_executable(${BINARY_NAME} WIN32 + "flutter_window.cpp" + "main.cpp" + "utils.cpp" + "win32_window.cpp" + "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc" + "Runner.rc" + "runner.exe.manifest" +) + +# Apply the standard set of build settings. This can be removed for applications +# that need different build settings. +apply_standard_settings(${BINARY_NAME}) + +# Add preprocessor definitions for the build version. +target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION=\"${FLUTTER_VERSION}\"") +target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION_MAJOR=${FLUTTER_VERSION_MAJOR}") +target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION_MINOR=${FLUTTER_VERSION_MINOR}") +target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION_PATCH=${FLUTTER_VERSION_PATCH}") +target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION_BUILD=${FLUTTER_VERSION_BUILD}") + +# Disable Windows macros that collide with C++ standard library functions. +target_compile_definitions(${BINARY_NAME} PRIVATE "NOMINMAX") + +# Add dependency libraries and include directories. Add any application-specific +# dependencies here. +target_link_libraries(${BINARY_NAME} PRIVATE flutter flutter_wrapper_app) +target_link_libraries(${BINARY_NAME} PRIVATE "dwmapi.lib") +target_include_directories(${BINARY_NAME} PRIVATE "${CMAKE_SOURCE_DIR}") + +# Run the Flutter tool portions of the build. This must not be removed. +add_dependencies(${BINARY_NAME} flutter_assemble) diff --git a/windows/runner/Runner.rc b/windows/runner/Runner.rc new file mode 100644 index 0000000..ba7f872 --- /dev/null +++ b/windows/runner/Runner.rc @@ -0,0 +1,121 @@ +// Microsoft Visual C++ generated resource script. +// +#pragma code_page(65001) +#include "resource.h" + +#define APSTUDIO_READONLY_SYMBOLS +///////////////////////////////////////////////////////////////////////////// +// +// Generated from the TEXTINCLUDE 2 resource. +// +#include "winres.h" + +///////////////////////////////////////////////////////////////////////////// +#undef APSTUDIO_READONLY_SYMBOLS + +///////////////////////////////////////////////////////////////////////////// +// English (United States) resources + +#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU) +LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US + +#ifdef APSTUDIO_INVOKED +///////////////////////////////////////////////////////////////////////////// +// +// TEXTINCLUDE +// + +1 TEXTINCLUDE +BEGIN + "resource.h\0" +END + +2 TEXTINCLUDE +BEGIN + "#include ""winres.h""\r\n" + "\0" +END + +3 TEXTINCLUDE +BEGIN + "\r\n" + "\0" +END + +#endif // APSTUDIO_INVOKED + + +///////////////////////////////////////////////////////////////////////////// +// +// Icon +// + +// Icon with lowest ID value placed first to ensure application icon +// remains consistent on all systems. +IDI_APP_ICON ICON "resources\\app_icon.ico" + + +///////////////////////////////////////////////////////////////////////////// +// +// Version +// + +#if defined(FLUTTER_VERSION_MAJOR) && defined(FLUTTER_VERSION_MINOR) && defined(FLUTTER_VERSION_PATCH) && defined(FLUTTER_VERSION_BUILD) +#define VERSION_AS_NUMBER FLUTTER_VERSION_MAJOR,FLUTTER_VERSION_MINOR,FLUTTER_VERSION_PATCH,FLUTTER_VERSION_BUILD +#else +#define VERSION_AS_NUMBER 1,0,0,0 +#endif + +#if defined(FLUTTER_VERSION) +#define VERSION_AS_STRING FLUTTER_VERSION +#else +#define VERSION_AS_STRING "1.0.0" +#endif + +VS_VERSION_INFO VERSIONINFO + FILEVERSION VERSION_AS_NUMBER + PRODUCTVERSION VERSION_AS_NUMBER + FILEFLAGSMASK VS_FFI_FILEFLAGSMASK +#ifdef _DEBUG + FILEFLAGS VS_FF_DEBUG +#else + FILEFLAGS 0x0L +#endif + FILEOS VOS__WINDOWS32 + FILETYPE VFT_APP + FILESUBTYPE 0x0L +BEGIN + BLOCK "StringFileInfo" + BEGIN + BLOCK "040904e4" + BEGIN + VALUE "CompanyName", "com.example" "\0" + VALUE "FileDescription", "openbillsclient" "\0" + VALUE "FileVersion", VERSION_AS_STRING "\0" + VALUE "InternalName", "openbillsclient" "\0" + VALUE "LegalCopyright", "Copyright (C) 2023 com.example. All rights reserved." "\0" + VALUE "OriginalFilename", "openbillsclient.exe" "\0" + VALUE "ProductName", "openbillsclient" "\0" + VALUE "ProductVersion", VERSION_AS_STRING "\0" + END + END + BLOCK "VarFileInfo" + BEGIN + VALUE "Translation", 0x409, 1252 + END +END + +#endif // English (United States) resources +///////////////////////////////////////////////////////////////////////////// + + + +#ifndef APSTUDIO_INVOKED +///////////////////////////////////////////////////////////////////////////// +// +// Generated from the TEXTINCLUDE 3 resource. +// + + +///////////////////////////////////////////////////////////////////////////// +#endif // not APSTUDIO_INVOKED diff --git a/windows/runner/flutter_window.cpp b/windows/runner/flutter_window.cpp new file mode 100644 index 0000000..955ee30 --- /dev/null +++ b/windows/runner/flutter_window.cpp @@ -0,0 +1,71 @@ +#include "flutter_window.h" + +#include <optional> + +#include "flutter/generated_plugin_registrant.h" + +FlutterWindow::FlutterWindow(const flutter::DartProject& project) + : project_(project) {} + +FlutterWindow::~FlutterWindow() {} + +bool FlutterWindow::OnCreate() { + if (!Win32Window::OnCreate()) { + return false; + } + + RECT frame = GetClientArea(); + + // The size here must match the window dimensions to avoid unnecessary surface + // creation / destruction in the startup path. + flutter_controller_ = std::make_unique<flutter::FlutterViewController>( + frame.right - frame.left, frame.bottom - frame.top, project_); + // Ensure that basic setup of the controller was successful. + if (!flutter_controller_->engine() || !flutter_controller_->view()) { + return false; + } + RegisterPlugins(flutter_controller_->engine()); + SetChildContent(flutter_controller_->view()->GetNativeWindow()); + + flutter_controller_->engine()->SetNextFrameCallback([&]() { + this->Show(); + }); + + // Flutter can complete the first frame before the "show window" callback is + // registered. The following call ensures a frame is pending to ensure the + // window is shown. It is a no-op if the first frame hasn't completed yet. + flutter_controller_->ForceRedraw(); + + return true; +} + +void FlutterWindow::OnDestroy() { + if (flutter_controller_) { + flutter_controller_ = nullptr; + } + + Win32Window::OnDestroy(); +} + +LRESULT +FlutterWindow::MessageHandler(HWND hwnd, UINT const message, + WPARAM const wparam, + LPARAM const lparam) noexcept { + // Give Flutter, including plugins, an opportunity to handle window messages. + if (flutter_controller_) { + std::optional<LRESULT> result = + flutter_controller_->HandleTopLevelWindowProc(hwnd, message, wparam, + lparam); + if (result) { + return *result; + } + } + + switch (message) { + case WM_FONTCHANGE: + flutter_controller_->engine()->ReloadSystemFonts(); + break; + } + + return Win32Window::MessageHandler(hwnd, message, wparam, lparam); +} diff --git a/windows/runner/flutter_window.h b/windows/runner/flutter_window.h new file mode 100644 index 0000000..6da0652 --- /dev/null +++ b/windows/runner/flutter_window.h @@ -0,0 +1,33 @@ +#ifndef RUNNER_FLUTTER_WINDOW_H_ +#define RUNNER_FLUTTER_WINDOW_H_ + +#include <flutter/dart_project.h> +#include <flutter/flutter_view_controller.h> + +#include <memory> + +#include "win32_window.h" + +// A window that does nothing but host a Flutter view. +class FlutterWindow : public Win32Window { + public: + // Creates a new FlutterWindow hosting a Flutter view running |project|. + explicit FlutterWindow(const flutter::DartProject& project); + virtual ~FlutterWindow(); + + protected: + // Win32Window: + bool OnCreate() override; + void OnDestroy() override; + LRESULT MessageHandler(HWND window, UINT const message, WPARAM const wparam, + LPARAM const lparam) noexcept override; + + private: + // The project to run. + flutter::DartProject project_; + + // The Flutter instance hosted by this window. + std::unique_ptr<flutter::FlutterViewController> flutter_controller_; +}; + +#endif // RUNNER_FLUTTER_WINDOW_H_ diff --git a/windows/runner/main.cpp b/windows/runner/main.cpp new file mode 100644 index 0000000..159a8c4 --- /dev/null +++ b/windows/runner/main.cpp @@ -0,0 +1,43 @@ +#include <flutter/dart_project.h> +#include <flutter/flutter_view_controller.h> +#include <windows.h> + +#include "flutter_window.h" +#include "utils.h" + +int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev, + _In_ wchar_t *command_line, _In_ int show_command) { + // Attach to console when present (e.g., 'flutter run') or create a + // new console when running with a debugger. + if (!::AttachConsole(ATTACH_PARENT_PROCESS) && ::IsDebuggerPresent()) { + CreateAndAttachConsole(); + } + + // Initialize COM, so that it is available for use in the library and/or + // plugins. + ::CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED); + + flutter::DartProject project(L"data"); + + std::vector<std::string> command_line_arguments = + GetCommandLineArguments(); + + project.set_dart_entrypoint_arguments(std::move(command_line_arguments)); + + FlutterWindow window(project); + Win32Window::Point origin(10, 10); + Win32Window::Size size(1280, 720); + if (!window.Create(L"openbillsclient", origin, size)) { + return EXIT_FAILURE; + } + window.SetQuitOnClose(true); + + ::MSG msg; + while (::GetMessage(&msg, nullptr, 0, 0)) { + ::TranslateMessage(&msg); + ::DispatchMessage(&msg); + } + + ::CoUninitialize(); + return EXIT_SUCCESS; +} diff --git a/windows/runner/resource.h b/windows/runner/resource.h new file mode 100644 index 0000000..66a65d1 --- /dev/null +++ b/windows/runner/resource.h @@ -0,0 +1,16 @@ +//{{NO_DEPENDENCIES}} +// Microsoft Visual C++ generated include file. +// Used by Runner.rc +// +#define IDI_APP_ICON 101 + +// Next default values for new objects +// +#ifdef APSTUDIO_INVOKED +#ifndef APSTUDIO_READONLY_SYMBOLS +#define _APS_NEXT_RESOURCE_VALUE 102 +#define _APS_NEXT_COMMAND_VALUE 40001 +#define _APS_NEXT_CONTROL_VALUE 1001 +#define _APS_NEXT_SYMED_VALUE 101 +#endif +#endif diff --git a/windows/runner/resources/app_icon.ico b/windows/runner/resources/app_icon.ico Binary files differnew file mode 100644 index 0000000..c04e20c --- /dev/null +++ b/windows/runner/resources/app_icon.ico diff --git a/windows/runner/runner.exe.manifest b/windows/runner/runner.exe.manifest new file mode 100644 index 0000000..a42ea76 --- /dev/null +++ b/windows/runner/runner.exe.manifest @@ -0,0 +1,20 @@ +<?xml version="1.0" encoding="UTF-8" standalone="yes"?> +<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0"> + <application xmlns="urn:schemas-microsoft-com:asm.v3"> + <windowsSettings> + <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2</dpiAwareness> + </windowsSettings> + </application> + <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1"> + <application> + <!-- Windows 10 and Windows 11 --> + <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/> + <!-- Windows 8.1 --> + <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/> + <!-- Windows 8 --> + <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/> + <!-- Windows 7 --> + <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/> + </application> + </compatibility> +</assembly> diff --git a/windows/runner/utils.cpp b/windows/runner/utils.cpp new file mode 100644 index 0000000..b2b0873 --- /dev/null +++ b/windows/runner/utils.cpp @@ -0,0 +1,65 @@ +#include "utils.h" + +#include <flutter_windows.h> +#include <io.h> +#include <stdio.h> +#include <windows.h> + +#include <iostream> + +void CreateAndAttachConsole() { + if (::AllocConsole()) { + FILE *unused; + if (freopen_s(&unused, "CONOUT$", "w", stdout)) { + _dup2(_fileno(stdout), 1); + } + if (freopen_s(&unused, "CONOUT$", "w", stderr)) { + _dup2(_fileno(stdout), 2); + } + std::ios::sync_with_stdio(); + FlutterDesktopResyncOutputStreams(); + } +} + +std::vector<std::string> GetCommandLineArguments() { + // Convert the UTF-16 command line arguments to UTF-8 for the Engine to use. + int argc; + wchar_t** argv = ::CommandLineToArgvW(::GetCommandLineW(), &argc); + if (argv == nullptr) { + return std::vector<std::string>(); + } + + std::vector<std::string> command_line_arguments; + + // Skip the first argument as it's the binary name. + for (int i = 1; i < argc; i++) { + command_line_arguments.push_back(Utf8FromUtf16(argv[i])); + } + + ::LocalFree(argv); + + return command_line_arguments; +} + +std::string Utf8FromUtf16(const wchar_t* utf16_string) { + if (utf16_string == nullptr) { + return std::string(); + } + int target_length = ::WideCharToMultiByte( + CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string, + -1, nullptr, 0, nullptr, nullptr) + -1; // remove the trailing null character + int input_length = (int)wcslen(utf16_string); + std::string utf8_string; + if (target_length <= 0 || target_length > utf8_string.max_size()) { + return utf8_string; + } + utf8_string.resize(target_length); + int converted_length = ::WideCharToMultiByte( + CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string, + input_length, utf8_string.data(), target_length, nullptr, nullptr); + if (converted_length == 0) { + return std::string(); + } + return utf8_string; +} diff --git a/windows/runner/utils.h b/windows/runner/utils.h new file mode 100644 index 0000000..3879d54 --- /dev/null +++ b/windows/runner/utils.h @@ -0,0 +1,19 @@ +#ifndef RUNNER_UTILS_H_ +#define RUNNER_UTILS_H_ + +#include <string> +#include <vector> + +// Creates a console for the process, and redirects stdout and stderr to +// it for both the runner and the Flutter library. +void CreateAndAttachConsole(); + +// Takes a null-terminated wchar_t* encoded in UTF-16 and returns a std::string +// encoded in UTF-8. Returns an empty std::string on failure. +std::string Utf8FromUtf16(const wchar_t* utf16_string); + +// Gets the command line arguments passed in as a std::vector<std::string>, +// encoded in UTF-8. Returns an empty std::vector<std::string> on failure. +std::vector<std::string> GetCommandLineArguments(); + +#endif // RUNNER_UTILS_H_ diff --git a/windows/runner/win32_window.cpp b/windows/runner/win32_window.cpp new file mode 100644 index 0000000..60608d0 --- /dev/null +++ b/windows/runner/win32_window.cpp @@ -0,0 +1,288 @@ +#include "win32_window.h" + +#include <dwmapi.h> +#include <flutter_windows.h> + +#include "resource.h" + +namespace { + +/// Window attribute that enables dark mode window decorations. +/// +/// Redefined in case the developer's machine has a Windows SDK older than +/// version 10.0.22000.0. +/// See: https://docs.microsoft.com/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute +#ifndef DWMWA_USE_IMMERSIVE_DARK_MODE +#define DWMWA_USE_IMMERSIVE_DARK_MODE 20 +#endif + +constexpr const wchar_t kWindowClassName[] = L"FLUTTER_RUNNER_WIN32_WINDOW"; + +/// Registry key for app theme preference. +/// +/// A value of 0 indicates apps should use dark mode. A non-zero or missing +/// value indicates apps should use light mode. +constexpr const wchar_t kGetPreferredBrightnessRegKey[] = + L"Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize"; +constexpr const wchar_t kGetPreferredBrightnessRegValue[] = L"AppsUseLightTheme"; + +// The number of Win32Window objects that currently exist. +static int g_active_window_count = 0; + +using EnableNonClientDpiScaling = BOOL __stdcall(HWND hwnd); + +// Scale helper to convert logical scaler values to physical using passed in +// scale factor +int Scale(int source, double scale_factor) { + return static_cast<int>(source * scale_factor); +} + +// Dynamically loads the |EnableNonClientDpiScaling| from the User32 module. +// This API is only needed for PerMonitor V1 awareness mode. +void EnableFullDpiSupportIfAvailable(HWND hwnd) { + HMODULE user32_module = LoadLibraryA("User32.dll"); + if (!user32_module) { + return; + } + auto enable_non_client_dpi_scaling = + reinterpret_cast<EnableNonClientDpiScaling*>( + GetProcAddress(user32_module, "EnableNonClientDpiScaling")); + if (enable_non_client_dpi_scaling != nullptr) { + enable_non_client_dpi_scaling(hwnd); + } + FreeLibrary(user32_module); +} + +} // namespace + +// Manages the Win32Window's window class registration. +class WindowClassRegistrar { + public: + ~WindowClassRegistrar() = default; + + // Returns the singleton registrar instance. + static WindowClassRegistrar* GetInstance() { + if (!instance_) { + instance_ = new WindowClassRegistrar(); + } + return instance_; + } + + // Returns the name of the window class, registering the class if it hasn't + // previously been registered. + const wchar_t* GetWindowClass(); + + // Unregisters the window class. Should only be called if there are no + // instances of the window. + void UnregisterWindowClass(); + + private: + WindowClassRegistrar() = default; + + static WindowClassRegistrar* instance_; + + bool class_registered_ = false; +}; + +WindowClassRegistrar* WindowClassRegistrar::instance_ = nullptr; + +const wchar_t* WindowClassRegistrar::GetWindowClass() { + if (!class_registered_) { + WNDCLASS window_class{}; + window_class.hCursor = LoadCursor(nullptr, IDC_ARROW); + window_class.lpszClassName = kWindowClassName; + window_class.style = CS_HREDRAW | CS_VREDRAW; + window_class.cbClsExtra = 0; + window_class.cbWndExtra = 0; + window_class.hInstance = GetModuleHandle(nullptr); + window_class.hIcon = + LoadIcon(window_class.hInstance, MAKEINTRESOURCE(IDI_APP_ICON)); + window_class.hbrBackground = 0; + window_class.lpszMenuName = nullptr; + window_class.lpfnWndProc = Win32Window::WndProc; + RegisterClass(&window_class); + class_registered_ = true; + } + return kWindowClassName; +} + +void WindowClassRegistrar::UnregisterWindowClass() { + UnregisterClass(kWindowClassName, nullptr); + class_registered_ = false; +} + +Win32Window::Win32Window() { + ++g_active_window_count; +} + +Win32Window::~Win32Window() { + --g_active_window_count; + Destroy(); +} + +bool Win32Window::Create(const std::wstring& title, + const Point& origin, + const Size& size) { + Destroy(); + + const wchar_t* window_class = + WindowClassRegistrar::GetInstance()->GetWindowClass(); + + const POINT target_point = {static_cast<LONG>(origin.x), + static_cast<LONG>(origin.y)}; + HMONITOR monitor = MonitorFromPoint(target_point, MONITOR_DEFAULTTONEAREST); + UINT dpi = FlutterDesktopGetDpiForMonitor(monitor); + double scale_factor = dpi / 96.0; + + HWND window = CreateWindow( + window_class, title.c_str(), WS_OVERLAPPEDWINDOW, + Scale(origin.x, scale_factor), Scale(origin.y, scale_factor), + Scale(size.width, scale_factor), Scale(size.height, scale_factor), + nullptr, nullptr, GetModuleHandle(nullptr), this); + + if (!window) { + return false; + } + + UpdateTheme(window); + + return OnCreate(); +} + +bool Win32Window::Show() { + return ShowWindow(window_handle_, SW_SHOWNORMAL); +} + +// static +LRESULT CALLBACK Win32Window::WndProc(HWND const window, + UINT const message, + WPARAM const wparam, + LPARAM const lparam) noexcept { + if (message == WM_NCCREATE) { + auto window_struct = reinterpret_cast<CREATESTRUCT*>(lparam); + SetWindowLongPtr(window, GWLP_USERDATA, + reinterpret_cast<LONG_PTR>(window_struct->lpCreateParams)); + + auto that = static_cast<Win32Window*>(window_struct->lpCreateParams); + EnableFullDpiSupportIfAvailable(window); + that->window_handle_ = window; + } else if (Win32Window* that = GetThisFromHandle(window)) { + return that->MessageHandler(window, message, wparam, lparam); + } + + return DefWindowProc(window, message, wparam, lparam); +} + +LRESULT +Win32Window::MessageHandler(HWND hwnd, + UINT const message, + WPARAM const wparam, + LPARAM const lparam) noexcept { + switch (message) { + case WM_DESTROY: + window_handle_ = nullptr; + Destroy(); + if (quit_on_close_) { + PostQuitMessage(0); + } + return 0; + + case WM_DPICHANGED: { + auto newRectSize = reinterpret_cast<RECT*>(lparam); + LONG newWidth = newRectSize->right - newRectSize->left; + LONG newHeight = newRectSize->bottom - newRectSize->top; + + SetWindowPos(hwnd, nullptr, newRectSize->left, newRectSize->top, newWidth, + newHeight, SWP_NOZORDER | SWP_NOACTIVATE); + + return 0; + } + case WM_SIZE: { + RECT rect = GetClientArea(); + if (child_content_ != nullptr) { + // Size and position the child window. + MoveWindow(child_content_, rect.left, rect.top, rect.right - rect.left, + rect.bottom - rect.top, TRUE); + } + return 0; + } + + case WM_ACTIVATE: + if (child_content_ != nullptr) { + SetFocus(child_content_); + } + return 0; + + case WM_DWMCOLORIZATIONCOLORCHANGED: + UpdateTheme(hwnd); + return 0; + } + + return DefWindowProc(window_handle_, message, wparam, lparam); +} + +void Win32Window::Destroy() { + OnDestroy(); + + if (window_handle_) { + DestroyWindow(window_handle_); + window_handle_ = nullptr; + } + if (g_active_window_count == 0) { + WindowClassRegistrar::GetInstance()->UnregisterWindowClass(); + } +} + +Win32Window* Win32Window::GetThisFromHandle(HWND const window) noexcept { + return reinterpret_cast<Win32Window*>( + GetWindowLongPtr(window, GWLP_USERDATA)); +} + +void Win32Window::SetChildContent(HWND content) { + child_content_ = content; + SetParent(content, window_handle_); + RECT frame = GetClientArea(); + + MoveWindow(content, frame.left, frame.top, frame.right - frame.left, + frame.bottom - frame.top, true); + + SetFocus(child_content_); +} + +RECT Win32Window::GetClientArea() { + RECT frame; + GetClientRect(window_handle_, &frame); + return frame; +} + +HWND Win32Window::GetHandle() { + return window_handle_; +} + +void Win32Window::SetQuitOnClose(bool quit_on_close) { + quit_on_close_ = quit_on_close; +} + +bool Win32Window::OnCreate() { + // No-op; provided for subclasses. + return true; +} + +void Win32Window::OnDestroy() { + // No-op; provided for subclasses. +} + +void Win32Window::UpdateTheme(HWND const window) { + DWORD light_mode; + DWORD light_mode_size = sizeof(light_mode); + LSTATUS result = RegGetValue(HKEY_CURRENT_USER, kGetPreferredBrightnessRegKey, + kGetPreferredBrightnessRegValue, + RRF_RT_REG_DWORD, nullptr, &light_mode, + &light_mode_size); + + if (result == ERROR_SUCCESS) { + BOOL enable_dark_mode = light_mode == 0; + DwmSetWindowAttribute(window, DWMWA_USE_IMMERSIVE_DARK_MODE, + &enable_dark_mode, sizeof(enable_dark_mode)); + } +} diff --git a/windows/runner/win32_window.h b/windows/runner/win32_window.h new file mode 100644 index 0000000..e901dde --- /dev/null +++ b/windows/runner/win32_window.h @@ -0,0 +1,102 @@ +#ifndef RUNNER_WIN32_WINDOW_H_ +#define RUNNER_WIN32_WINDOW_H_ + +#include <windows.h> + +#include <functional> +#include <memory> +#include <string> + +// A class abstraction for a high DPI-aware Win32 Window. Intended to be +// inherited from by classes that wish to specialize with custom +// rendering and input handling +class Win32Window { + public: + struct Point { + unsigned int x; + unsigned int y; + Point(unsigned int x, unsigned int y) : x(x), y(y) {} + }; + + struct Size { + unsigned int width; + unsigned int height; + Size(unsigned int width, unsigned int height) + : width(width), height(height) {} + }; + + Win32Window(); + virtual ~Win32Window(); + + // Creates a win32 window with |title| that is positioned and sized using + // |origin| and |size|. New windows are created on the default monitor. Window + // sizes are specified to the OS in physical pixels, hence to ensure a + // consistent size this function will scale the inputted width and height as + // as appropriate for the default monitor. The window is invisible until + // |Show| is called. Returns true if the window was created successfully. + bool Create(const std::wstring& title, const Point& origin, const Size& size); + + // Show the current window. Returns true if the window was successfully shown. + bool Show(); + + // Release OS resources associated with window. + void Destroy(); + + // Inserts |content| into the window tree. + void SetChildContent(HWND content); + + // Returns the backing Window handle to enable clients to set icon and other + // window properties. Returns nullptr if the window has been destroyed. + HWND GetHandle(); + + // If true, closing this window will quit the application. + void SetQuitOnClose(bool quit_on_close); + + // Return a RECT representing the bounds of the current client area. + RECT GetClientArea(); + + protected: + // Processes and route salient window messages for mouse handling, + // size change and DPI. Delegates handling of these to member overloads that + // inheriting classes can handle. + virtual LRESULT MessageHandler(HWND window, + UINT const message, + WPARAM const wparam, + LPARAM const lparam) noexcept; + + // Called when CreateAndShow is called, allowing subclass window-related + // setup. Subclasses should return false if setup fails. + virtual bool OnCreate(); + + // Called when Destroy is called. + virtual void OnDestroy(); + + private: + friend class WindowClassRegistrar; + + // OS callback called by message pump. Handles the WM_NCCREATE message which + // is passed when the non-client area is being created and enables automatic + // non-client DPI scaling so that the non-client area automatically + // responds to changes in DPI. All other messages are handled by + // MessageHandler. + static LRESULT CALLBACK WndProc(HWND const window, + UINT const message, + WPARAM const wparam, + LPARAM const lparam) noexcept; + + // Retrieves a class instance pointer for |window| + static Win32Window* GetThisFromHandle(HWND const window) noexcept; + + // Update the window frame's theme to match the system theme. + static void UpdateTheme(HWND const window); + + bool quit_on_close_ = false; + + // window handle for top level window. + HWND window_handle_ = nullptr; + + // window handle for hosted content. + HWND child_content_ = nullptr; +}; + +#endif // RUNNER_WIN32_WINDOW_H_ |