From 05ef543615a6da3e964653a5126a2a84f41e9b9f Mon Sep 17 00:00:00 2001
From: ChestnutYueyue <952134128@qq.com>
Date: Mon, 16 Feb 2026 09:45:22 +0800
Subject: [PATCH] =?UTF-8?q?refactor(=E8=BE=93=E5=85=A5=E7=B3=BB=E7=BB=9F):?=
 =?UTF-8?q?=20=E9=87=8D=E6=9E=84=E9=94=AE=E7=9B=98=E5=92=8C=E9=BC=A0?=
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将键盘和鼠标事件处理从SDL事件回调移动到独立的update方法
使用SDL_GetKeyboardState和SDL_GetMouseState统一处理输入状态
---
 .../src/platform/backends/sdl2/sdl2_input.cpp | 119 +++++++++---------
 1 file changed, 57 insertions(+), 62 deletions(-)

diff --git a/Extra2D/src/platform/backends/sdl2/sdl2_input.cpp b/Extra2D/src/platform/backends/sdl2/sdl2_input.cpp
index a2f2e0d..14eceb6 100644
--- a/Extra2D/src/platform/backends/sdl2/sdl2_input.cpp
+++ b/Extra2D/src/platform/backends/sdl2/sdl2_input.cpp
@@ -47,6 +47,8 @@ void SDL2Input::update() {
     scrollDelta_ = 0.0f;
     mouseDelta_ = Vec2{0.0f, 0.0f};
     
+    updateKeyboard();
+    updateMouse();
     updateGamepad();
 }
 
@@ -56,66 +58,6 @@ void SDL2Input::setEventCallback(EventCallback callback) {
 
 void SDL2Input::handleSDLEvent(const SDL_Event& event) {
     switch (event.type) {
-        case SDL_KEYDOWN: {
-            int key = event.key.keysym.scancode;
-            if (key >= 0 && key < static_cast<int>(Key::Count)) {
-                if (!keyCurrent_[key]) {
-                    keyCurrent_[key] = true;
-                    
-                    Event e = Event::createKeyPress(
-                        event.key.keysym.sym,
-                        event.key.keysym.scancode,
-                        event.key.keysym.mod
-                    );
-                    dispatchEvent(e);
-                }
-            }
-            break;
-        }
-        
-        case SDL_KEYUP: {
-            int key = event.key.keysym.scancode;
-            if (key >= 0 && key < static_cast<int>(Key::Count)) {
-                keyCurrent_[key] = false;
-                
-                Event e = Event::createKeyRelease(
-                    event.key.keysym.sym,
-                    event.key.keysym.scancode,
-                    event.key.keysym.mod
-                );
-                dispatchEvent(e);
-            }
-            break;
-        }
-        
-        case SDL_MOUSEBUTTONDOWN: {
-            int btn = event.button.button;
-            int idx = btn - 1;
-            if (idx >= 0 && idx < static_cast<int>(Mouse::Count)) {
-                mouseCurrent_[idx] = true;
-                
-                Vec2 pos{static_cast<float>(event.button.x), 
-                        static_cast<float>(event.button.y)};
-                Event e = Event::createMousePress(btn, 0, pos);
-                dispatchEvent(e);
-            }
-            break;
-        }
-        
-        case SDL_MOUSEBUTTONUP: {
-            int btn = event.button.button;
-            int idx = btn - 1;
-            if (idx >= 0 && idx < static_cast<int>(Mouse::Count)) {
-                mouseCurrent_[idx] = false;
-                
-                Vec2 pos{static_cast<float>(event.button.x), 
-                        static_cast<float>(event.button.y)};
-                Event e = Event::createMouseRelease(btn, 0, pos);
-                dispatchEvent(e);
-            }
-            break;
-        }
-        
         case SDL_MOUSEMOTION: {
             Vec2 newPos{static_cast<float>(event.motion.x), 
                        static_cast<float>(event.motion.y)};
@@ -344,12 +286,65 @@ TouchPoint SDL2Input::touchPoint(int index) const {
 }
 
 void SDL2Input::updateKeyboard() {
+    int numKeys = 0;
+    const Uint8* state = SDL_GetKeyboardState(&numKeys);
+    
+    for (int i = 0; i < static_cast<int>(Key::Count) && i < numKeys; ++i) {
+        bool currentState = state[i] != 0;
+        
+        if (currentState != keyCurrent_[i]) {
+            if (currentState && !keyCurrent_[i]) {
+                Event e = Event::createKeyPress(
+                    SDL_GetKeyFromScancode(static_cast<SDL_Scancode>(i)),
+                    i,
+                    SDL_GetModState()
+                );
+                dispatchEvent(e);
+            } else if (!currentState && keyCurrent_[i]) {
+                Event e = Event::createKeyRelease(
+                    SDL_GetKeyFromScancode(static_cast<SDL_Scancode>(i)),
+                    i,
+                    SDL_GetModState()
+                );
+                dispatchEvent(e);
+            }
+        }
+        
+        keyCurrent_[i] = currentState;
+    }
 }
 
 void SDL2Input::updateMouse() {
     int x = 0, y = 0;
-    SDL_GetMouseState(&x, &y);
-    mousePos_ = Vec2{static_cast<float>(x), static_cast<float>(y)};
+    Uint32 state = SDL_GetMouseState(&x, &y);
+    
+    Vec2 newPos{static_cast<float>(x), static_cast<float>(y)};
+    mouseDelta_ = newPos - mousePos_;
+    mousePos_ = newPos;
+    
+    static const int mouseButtons[] = {
+        SDL_BUTTON_LEFT,
+        SDL_BUTTON_MIDDLE,
+        SDL_BUTTON_RIGHT,
+        SDL_BUTTON_X1,
+        SDL_BUTTON_X2
+    };
+    
+    for (int i = 0; i < static_cast<int>(Mouse::Count); ++i) {
+        bool currentState = (state & SDL_BUTTON(mouseButtons[i])) != 0;
+        
+        if (currentState != mouseCurrent_[i]) {
+            if (currentState && !mouseCurrent_[i]) {
+                Event e = Event::createMousePress(mouseButtons[i], 0, mousePos_);
+                dispatchEvent(e);
+            } else if (!currentState && mouseCurrent_[i]) {
+                Event e = Event::createMouseRelease(mouseButtons[i], 0, mousePos_);
+                dispatchEvent(e);
+            }
+        }
+        
+        mouseCurrent_[i] = currentState;
+    }
 }
 
 void SDL2Input::updateGamepad() {