Initial commit

windows/runner/flutter_window.cpp

@@ -0,0 +1,117 @@
+#include "flutter_window.h"
+#include <flutter/event_channel.h>
+#include <flutter/event_sink.h>
+#include <flutter/event_stream_handler_functions.h>
+#include <flutter/standard_method_codec.h>
+#include <optional>
+
+#include "flutter/generated_plugin_registrant.h"
+
+std::unique_ptr<flutter::EventSink<flutter::EncodableValue>>&& mouseEvents = nullptr;
+
+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());
+
+    //监听鼠标侧键的EventChannel
+    const auto channelName = "pixes/mouse";
+    flutter::EventChannel<> channel2(
+        flutter_controller_->engine()->messenger(), channelName,
+        &flutter::StandardMethodCodec::GetInstance()
+    );
+
+    auto eventHandler = std::make_unique<
+        flutter::StreamHandlerFunctions<flutter::EncodableValue>>(
+    [](
+        const flutter::EncodableValue* arguments,
+        std::unique_ptr<flutter::EventSink<flutter::EncodableValue>>&& events){
+            mouseEvents = std::move(events);
+            return nullptr;
+    },
+    [](const flutter::EncodableValue* arguments)
+        -> std::unique_ptr<flutter::StreamHandlerError<flutter::EncodableValue>> {
+            mouseEvents = nullptr;
+            return nullptr;
+    });
+
+    channel2.SetStreamHandler(std::move(eventHandler));
+
+  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();
+}
+
+void mouse_side_button_listener(unsigned int input)
+{
+    if(mouseEvents != nullptr)
+    {
+        mouseEvents->Success(static_cast<int>(input));
+    }
+}
+
+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.
+    UINT button = GET_XBUTTON_WPARAM(wparam);
+    if (button == XBUTTON1 && message == 528)
+    {
+        mouse_side_button_listener(0);
+    }
+    else if (button == XBUTTON2 && message == 528)
+    {
+        mouse_side_button_listener(1);
+    }
+  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);
+}