From 93265251d56c91b05f160423077ce95339786f87 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Fri, 30 Oct 2020 13:14:34 +0800
Subject: ...

---
 include/cru/platform/gui/UiApplication.hpp |  4 +++
 include/cru/ui/host/LayoutPaintCycler.hpp  | 39 ++++++++++++++++++++++++++++++
 include/cru/ui/host/WindowHost.hpp         |  8 +++++-
 3 files changed, 50 insertions(+), 1 deletion(-)
 create mode 100644 include/cru/ui/host/LayoutPaintCycler.hpp

(limited to 'include/cru')

diff --git a/include/cru/platform/gui/UiApplication.hpp b/include/cru/platform/gui/UiApplication.hpp
index 6a2eb067..ff947dfc 100644
--- a/include/cru/platform/gui/UiApplication.hpp
+++ b/include/cru/platform/gui/UiApplication.hpp
@@ -67,6 +67,10 @@ class TimerAutoCanceler {
     return *this;
   }
 
+  TimerAutoCanceler& operator=(long long other) {
+    return this->operator=(TimerAutoCanceler(other));
+  }
+
   ~TimerAutoCanceler() { Reset(); }
 
   long long Release() {
diff --git a/include/cru/ui/host/LayoutPaintCycler.hpp b/include/cru/ui/host/LayoutPaintCycler.hpp
new file mode 100644
index 00000000..ed543afa
--- /dev/null
+++ b/include/cru/ui/host/LayoutPaintCycler.hpp
@@ -0,0 +1,39 @@
+#pragma once
+#include "../Base.hpp"
+
+#include "cru/platform/gui/UiApplication.hpp"
+
+#include <chrono>
+
+namespace cru::ui::host {
+class LayoutPaintCycler {
+ public:
+  explicit LayoutPaintCycler(WindowHost* host);
+
+  CRU_DELETE_COPY(LayoutPaintCycler)
+  CRU_DELETE_MOVE(LayoutPaintCycler)
+
+  ~LayoutPaintCycler();
+
+ public:
+  void InvalidateLayout();
+  void InvalidatePaint();
+
+  bool IsLayoutDirty() { return layout_dirty_; }
+
+ private:
+  void OnCycle();
+
+ private:
+  WindowHost* host_;
+
+  platform::gui::TimerAutoCanceler timer_canceler_;
+
+  bool layout_dirty_ = true;
+  bool paint_dirty_ = true;
+
+  std::chrono::steady_clock::time_point last_cycle_time_;
+  std::chrono::steady_clock::duration cycle_threshold_ =
+      std::chrono::milliseconds(1000) / 144;
+};
+}  // namespace cru::ui::host
diff --git a/include/cru/ui/host/WindowHost.hpp b/include/cru/ui/host/WindowHost.hpp
index 77ed937f..81eabb52 100644
--- a/include/cru/ui/host/WindowHost.hpp
+++ b/include/cru/ui/host/WindowHost.hpp
@@ -7,8 +7,11 @@
 #include "../render/Base.hpp"
 
 #include <functional>
+#include <memory>
 
 namespace cru::ui::host {
+class LayoutPaintCycler;
+
 struct AfterLayoutEventArgs {};
 
 // The bridge between control tree and native window.
@@ -43,6 +46,8 @@ class WindowHost : public Object {
   void Relayout();
   void Relayout(const Size& available_size);
 
+  void Repaint();
+
   // Is layout is invalid, wait for relayout and then run the action. Otherwist
   // run it right now.
   void RunAfterLayoutStable(std::function<void()> action);
@@ -125,7 +130,8 @@ class WindowHost : public Object {
 
   platform::gui::INativeWindow* native_window_ = nullptr;
 
-  bool need_layout_ = false;
+  std::unique_ptr<LayoutPaintCycler> layout_paint_cycler_;
+
   Event<AfterLayoutEventArgs> after_layout_event_;
   std::vector<std::function<void()> > after_layout_stable_action_;
 
-- 
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