sdl add event dispatch logic.

2 files changed, 51 insertions, 0 deletions

diff --git a/src/platform/gui/sdl/UiApplication.cpp b/src/platform/gui/sdl/UiApplication.cpp
index c876ad19..d2275a37 100644
--- a/src/platform/gui/sdl/UiApplication.cpp
+++ b/src/platform/gui/sdl/UiApplication.cpp
@@ -11,6 +11,7 @@
 #include <algorithm>
 #include <chrono>
 #include <functional>
+#include <optional>
 
 namespace cru::platform::gui::sdl {
 SdlUiApplication::SdlUiApplication(graphics::IGraphicsFactory* graphics_factory,
@@ -48,6 +49,8 @@ int SdlUiApplication::Run() {
       break;
     }
 
+    DispatchEvent(event);
+
     delete_later_pool_.Clean();
   }
 
@@ -153,4 +156,44 @@ long long SdlUiApplication::SetTimer(std::chrono::milliseconds milliseconds,
   PostEmptyEvent();
   return timers_.Add(std::move(action), milliseconds, repeat);
 }
+
+namespace {
+std::optional<SDL_WindowID> GetEventWindowId(const SDL_Event& event) {
+  switch (event.type) {
+    case SDL_EVENT_WINDOW_MOVED:
+    case SDL_EVENT_WINDOW_RESIZED:
+    case SDL_EVENT_WINDOW_SHOWN:
+    case SDL_EVENT_WINDOW_HIDDEN:
+    case SDL_EVENT_WINDOW_MINIMIZED:
+    case SDL_EVENT_WINDOW_FOCUS_GAINED:
+    case SDL_EVENT_WINDOW_FOCUS_LOST:
+    case SDL_EVENT_WINDOW_MOUSE_ENTER:
+    case SDL_EVENT_WINDOW_MOUSE_LEAVE:
+    case SDL_EVENT_WINDOW_DESTROYED:
+      return event.window.windowID;
+    case SDL_EVENT_MOUSE_BUTTON_DOWN:
+    case SDL_EVENT_MOUSE_BUTTON_UP:
+      return event.button.windowID;
+    case SDL_EVENT_MOUSE_WHEEL:
+      return event.wheel.windowID;
+    case SDL_EVENT_KEY_DOWN:
+    case SDL_EVENT_KEY_UP:
+      return event.key.windowID;
+    default:
+      return std::nullopt;
+  }
+}
+}  // namespace
+
+bool SdlUiApplication::DispatchEvent(const SDL_Event& event) {
+  if (auto window_id = GetEventWindowId(event)) {
+    for (auto window : windows_) {
+      if (window->sdl_window_id_ == *window_id && window->HandleEvent(&event)) {
+        return true;
+      }
+    }
+  }
+  return false;
+}
+
 }  // namespace cru::platform::gui::sdl
diff --git a/src/platform/gui/sdl/Window.cpp b/src/platform/gui/sdl/Window.cpp
index b0fcded4..3ab8cf4d 100644
--- a/src/platform/gui/sdl/Window.cpp
+++ b/src/platform/gui/sdl/Window.cpp
@@ -18,6 +18,8 @@ namespace cru::platform::gui::sdl {
 
 SdlWindow::SdlWindow(SdlUiApplication* application)
     : application_(application),
+      sdl_window_(nullptr),
+      sdl_window_id_(0),
       client_rect_(100, 100, 400, 200),
       parent_(nullptr) {
   application->RegisterWindow(this);
@@ -214,6 +216,11 @@ void SdlWindow::DoCreateWindow() {
     throw SdlException("Failed to create window.");
   }
 
+  sdl_window_id_ = SDL_GetWindowID(sdl_window_);
+  if (sdl_window_id_ == 0) {
+    throw SdlException("Failed to get ID of created window.");
+  }
+
   CreateEvent_.Raise(nullptr);
 
   CheckSdlReturn(
@@ -309,6 +316,7 @@ bool SdlWindow::HandleEvent(const SDL_Event* event) {
       VisibilityChangeEvent_.Raise(WindowVisibilityType::Hide);
       DestroyEvent_.Raise(nullptr);
       sdl_window_ = nullptr;
+      sdl_window_id_ = 0;
       return true;
     }
     case SDL_EVENT_MOUSE_BUTTON_DOWN: {