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1 files changed, 112 insertions, 0 deletions

diff --git a/include/cru/platform/gui/Window.h b/include/cru/platform/gui/Window.h
new file mode 100644
index 00000000..d3f0daad
--- /dev/null
+++ b/include/cru/platform/gui/Window.h
@@ -0,0 +1,112 @@
+#pragma once
+#include "Base.h"
+
+#include "Keyboard.h"
+
+#include "cru/common/Event.h"
+
+#include <string_view>
+
+namespace cru::platform::gui {
+namespace details {
+struct WindowStyleFlagTag;
+}
+
+using WindowStyleFlag = Bitmask<details::WindowStyleFlagTag>;
+
+struct WindowStyleFlags {
+  static constexpr WindowStyleFlag NoCaptionAndBorder{0b1};
+};
+
+enum class WindowVisibilityType { Show, Hide, Minimize };
+
+enum class FocusChangeType { Gain, Lose };
+
+enum class MouseEnterLeaveType { Enter, Leave };
+
+struct NativeMouseButtonEventArgs {
+  MouseButton button;
+  Point point;
+  KeyModifier modifier;
+};
+
+struct NativeMouseWheelEventArgs {
+  // Positive means down. Negative means up.
+  float delta;
+  Point point;
+  KeyModifier modifier;
+  bool horizontal;  // true if horizontal wheel.
+};
+
+struct NativeKeyEventArgs {
+  KeyCode key;
+  KeyModifier modifier;
+};
+
+// Represents a native window, which exposes some low-level events and
+// operations.
+struct INativeWindow : virtual IPlatformResource {
+  virtual void Close() = 0;
+
+  virtual INativeWindow* GetParent() = 0;
+  virtual void SetParent(INativeWindow* parent) = 0;
+
+  virtual WindowStyleFlag GetStyleFlag() = 0;
+  virtual void SetStyleFlag(WindowStyleFlag flag) = 0;
+
+  virtual String GetTitle() = 0;
+  virtual void SetTitle(String title) = 0;
+
+  virtual WindowVisibilityType GetVisibility() = 0;
+  virtual void SetVisibility(WindowVisibilityType visibility) = 0;
+
+  virtual Size GetClientSize() = 0;
+  virtual void SetClientSize(const Size& size) = 0;
+
+  virtual Rect GetClientRect() = 0;
+  virtual void SetClientRect(const Rect& rect) = 0;
+
+  // Get the rect of the window containing frame.
+  // The lefttop of the rect is relative to screen lefttop.
+  virtual Rect GetWindowRect() = 0;
+
+  // Set the rect of the window containing frame.
+  // The lefttop of the rect is relative to screen lefttop.
+  virtual void SetWindowRect(const Rect& rect) = 0;
+
+  virtual bool RequestFocus() = 0;
+
+  // Relative to client lefttop.
+  virtual Point GetMousePosition() = 0;
+
+  virtual bool CaptureMouse() = 0;
+  virtual bool ReleaseMouse() = 0;
+
+  virtual void SetCursor(std::shared_ptr<ICursor> cursor) = 0;
+
+  virtual void SetToForeground() = 0;
+
+  virtual void RequestRepaint() = 0;
+
+  // Remember to call EndDraw on return value and destroy it.
+  virtual std::unique_ptr<graphics::IPainter> BeginPaint() = 0;
+
+  virtual IEvent<std::nullptr_t>* CreateEvent() = 0;
+  virtual IEvent<std::nullptr_t>* DestroyEvent() = 0;
+  virtual IEvent<std::nullptr_t>* PaintEvent() = 0;
+
+  virtual IEvent<WindowVisibilityType>* VisibilityChangeEvent() = 0;
+  virtual IEvent<Size>* ResizeEvent() = 0;
+  virtual IEvent<FocusChangeType>* FocusEvent() = 0;
+
+  virtual IEvent<MouseEnterLeaveType>* MouseEnterLeaveEvent() = 0;
+  virtual IEvent<Point>* MouseMoveEvent() = 0;
+  virtual IEvent<NativeMouseButtonEventArgs>* MouseDownEvent() = 0;
+  virtual IEvent<NativeMouseButtonEventArgs>* MouseUpEvent() = 0;
+  virtual IEvent<NativeMouseWheelEventArgs>* MouseWheelEvent() = 0;
+  virtual IEvent<NativeKeyEventArgs>* KeyDownEvent() = 0;
+  virtual IEvent<NativeKeyEventArgs>* KeyUpEvent() = 0;
+
+  virtual IInputMethodContext* GetInputMethodContext() = 0;
+};
+}  // namespace cru::platform::gui