75 lines
3.1 KiB
C++
75 lines
3.1 KiB
C++
#ifndef RUNNER_FLUTTER_WINDOW_H_
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#define RUNNER_FLUTTER_WINDOW_H_
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#include <flutter/dart_project.h>
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#include <flutter/flutter_view_controller.h>
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#include <flutter/method_channel.h>
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#include <memory>
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#include "win32_window.h"
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// A window that does nothing but host a Flutter view.
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class FlutterWindow : public Win32Window {
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public:
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// Creates a new FlutterWindow hosting a Flutter view running |project|.
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explicit FlutterWindow(const flutter::DartProject& project);
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virtual ~FlutterWindow();
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protected:
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// Win32Window:
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bool OnCreate() override;
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void OnDestroy() override;
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LRESULT MessageHandler(HWND window, UINT const message, WPARAM const wparam,
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LPARAM const lparam) noexcept override;
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private:
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// The project to run.
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flutter::DartProject project_;
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// The Flutter instance hosted in this window.
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std::unique_ptr<flutter::FlutterViewController> flutter_controller_;
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// Windows platform MethodChannel for theme control.
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std::unique_ptr<flutter::MethodChannel<>> platform_channel_;
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// 窗口控制 MethodChannel（窗口大小预设菜单等）
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std::unique_ptr<flutter::MethodChannel<>> window_control_channel_;
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// 弹出原生窗口大小预设菜单（TrackPopupMenuEx）
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// 返回 true 表示用户选择了某个尺寸，false 表示用户取消了菜单
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bool ShowWindowSizeMenu(HWND hwnd);
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// Subclass ID for the Flutter child window (WM_NCHITTEST → HTTRANSPARENT)
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static const UINT_PTR kChildSubclassId = 12345;
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// Subclass callback: forward title-bar hit-test to parent window so the
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// parent can return HTCAPTION and Windows performs native modal dragging.
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static LRESULT CALLBACK ChildWndProc(HWND hwnd, UINT message,
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WPARAM wparam, LPARAM lparam,
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UINT_PTR subclass_id,
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DWORD_PTR ref_data);
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// ============================================================
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// 原生拖拽状态：SC_MOVE 模态循环期间绕过插件链 + 子窗口消息拦截
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//
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// 根因（经 v1~v8 验证）：
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// 1. 手动 SetWindowPos 拖拽不触发 DWM "live drag" 优化
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// 2. 完全禁用 Mica 能解决卡顿（v8 验证），但临时禁用 Mica（v4~v7）失败
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// 3. v4~v7 失败的原因：EnterSizeMove 遗漏了 SetWindowCompositionAttribute
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// (ACCENT_DISABLED) 调用——这是 flutter_acrylic 的 setEffect(disabled)
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// 能立即禁用 Mica 的关键。仅靠 DwmSetWindowAttribute 是异步的，不生效。
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//
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// 修复（v9）：
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// - WM_NCLBUTTONDOWN(HTCAPTION) 时调用 EnterSizeMove 禁用 Mica
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// （现在包含 SetWindowCompositionAttribute(ACCENT_DISABLED)，能立即生效）
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// - SWP_FRAMECHANGED 强制 DWM 同步应用变更
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// - DefWindowProc 进入 SC_MOVE 模态循环
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// - DefWindowProc 返回后调用 ExitSizeMove 恢复 Mica + SWP_FRAMECHANGED
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// - 模态循环期间绕过插件链 + 子窗口消息拦截（v8）
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// ============================================================
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static bool is_in_native_drag_;
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};
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#endif // RUNNER_FLUTTER_WINDOW_H_
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