From 991ee18148b815a95c8a59a91eb0c9263311aa7a Mon Sep 17 00:00:00 2001
From: lixianjing <xianjimli@hotmail.com>
Date: Thu, 28 Nov 2024 18:25:25 +0800
Subject: [PATCH] forward SDL_TouchFingerEvent to window(touch_event_t)

---
 docs/changes.md               |  1 +
 src/base/events.c             | 26 +++++++++++
 src/base/events.h             | 84 +++++++++++++++++++++++++++++++++++
 src/main_loop/main_loop_sdl.c | 47 +++++++++++++++++++-
 4 files changed, 157 insertions(+), 1 deletion(-)

diff --git a/docs/changes.md b/docs/changes.md
index f999e0c620..55489b6673 100644
--- a/docs/changes.md
+++ b/docs/changes.md
@@ -3,6 +3,7 @@
 2024/11/28
   * 增加函数 bitmap\_set\_dirty/bitmap\_is\_dirty
   * 重构bitmap，用bitmap\_init\_ex 实现bitmap\_create\_ex
+  * 将SDL_TouchFingerEvent转发到top windows
 
 2024/11/26
   * 增加tab\_button\_group删除tab\_button和对应page的函数(感谢智明提供补丁)
diff --git a/src/base/events.c b/src/base/events.c
index fbed5a2de4..c21262b99e 100644
--- a/src/base/events.c
+++ b/src/base/events.c
@@ -487,6 +487,32 @@ event_t* system_event_init(system_event_t* event, void* target, void* sdl_event)
   return (event_t*)event;
 }
 
+touch_event_t* touch_event_cast(event_t* event) {
+  return_value_if_fail(event != NULL, NULL);
+  return_value_if_fail(
+      event->type == EVT_TOUCH_DOWN || event->type == EVT_TOUCH_UP || event->type == EVT_TOUCH_MOVE,
+      NULL);
+  return_value_if_fail(event->size == sizeof(touch_event_t), NULL);
+
+  return (touch_event_t*)event;
+}
+
+event_t* touch_event_init(touch_event_t* event, uint32_t type, void* target, int64_t touch_id,
+                          int64_t finger_id, float x, float y, float pressure) {
+  return_value_if_fail(event != NULL, NULL);
+  memset(event, 0x00, sizeof(touch_event_t));
+
+  event->e = event_init(type, target);
+  event->e.size = sizeof(*event);
+  event->touch_id = touch_id;
+  event->finger_id = finger_id;
+  event->x = x;
+  event->y = y;
+  event->pressure = pressure;
+
+  return (event_t*)event;
+}
+
 ui_load_event_t* ui_load_event_cast(event_t* event) {
   return_value_if_fail(event != NULL, NULL);
   return_value_if_fail(event->type == EVT_UI_LOAD, NULL);
diff --git a/src/base/events.h b/src/base/events.h
index 14b53eb420..914642164b 100644
--- a/src/base/events.h
+++ b/src/base/events.h
@@ -535,6 +535,21 @@ typedef enum _event_type_t {
    * UI加载完成事件(event_t)。
    */
   EVT_UI_LOAD,
+  /**
+   * @const EVT_TOUCH_DOWN
+   * 触摸按下事件名(touch_event_t)。
+   */
+  EVT_TOUCH_DOWN,
+  /**
+   * @const EVT_TOUCH_MOVE
+   * 触摸移动事件名(touch_event_t)。
+   */
+  EVT_TOUCH_MOVE,
+  /**
+   * @const EVT_TOUCH_UP
+   * 触摸抬起事件名(touch_event_t)。
+   */
+  EVT_TOUCH_UP,
   /**
    * @const EVT_REQ_START
    * event queue其它请求编号起始值。
@@ -1309,6 +1324,75 @@ system_event_t* system_event_cast(event_t* event);
  */
 event_t* system_event_init(system_event_t* event, void* target, void* sdl_event);
 
+/**
+ * @class touch_event_t
+ * @annotation ["scriptable"]
+ * @parent event_t
+ * 多点触摸事件(目前主要对接 SDL_TouchFingerEvent(SDL_FINGERMOTION/SDL_FINGERDOWN/SDL_FINGERUP))。
+ */
+typedef struct _touch_event_t {
+  event_t e;
+
+  /**
+   * @property {int64_t} touch_id
+   * @annotation ["readable", "scriptable"]
+   * 触摸ID。
+   */
+  int64_t touch_id;
+  /**
+   * @property {int64_t} finger_id
+   * @annotation ["readable", "scriptable"]
+   * 手指ID。
+   */
+  int64_t finger_id;
+  /**
+   * @property {float} x
+   * @annotation ["readable", "scriptable"]
+   * x坐标。
+   */
+  float x;
+  /**
+   * @property {float} y
+   * @annotation ["readable", "scriptable"]
+   * y坐标。
+   */
+  float y;
+  /**
+   * @property {float} pressure
+   * @annotation ["readable", "scriptable"]
+   * 压力。
+   */
+  float pressure;
+
+} touch_event_t;
+
+/**
+ * @method touch_event_cast
+ * @annotation ["cast", "scriptable"]
+ * 把event对象转touch_event_t对象。
+ * @param {event_t*} event event对象。
+ *
+ * @return {touch_event_t*} event 对象。
+ */
+touch_event_t* touch_event_cast(event_t* event);
+
+/**
+ * @method touch_event_init
+ * 初始化事件。
+ * @param {touch_event_t*} event event对象。
+ * @param {uint32_t} type 事件类型。
+ * @param {void*} target 事件目标。
+ * @param {int64_t} touch_id 触摸ID。
+ * @param {int64_t} finger_id 手指ID。
+ * @param {float} x x坐标。
+ * @param {float} y y坐标。
+ * @param {float} pressure 压力。
+ *
+ * @return {event_t*} event对象。
+ */
+event_t* touch_event_init(touch_event_t* event, uint32_t type, void* target, int64_t touch_id,
+                          int64_t finger_id, float x, float y, float pressure);
+
 /**
  * @class ui_load_event_t
  * @annotation ["scriptable"]
diff --git a/src/main_loop/main_loop_sdl.c b/src/main_loop/main_loop_sdl.c
index 1bb83429b7..28e9e649a1 100644
--- a/src/main_loop/main_loop_sdl.c
+++ b/src/main_loop/main_loop_sdl.c
@@ -1,4 +1,4 @@
-/**
+/**
  * File:   main_loop_sdl.c
  * Author: AWTK Develop Team
  * Brief:  sdl2 implemented main_loop interface
@@ -118,6 +118,45 @@ static ret_t main_loop_sdl2_dispatch_multi_gesture_event(main_loop_simple_t* loo
   return RET_OK;
 }
 
+static ret_t main_loop_sdl2_dispatch_touch_event(main_loop_simple_t* loop, SDL_Event* sdl_event) {
+  event_t* e = NULL;
+  touch_event_t event;
+  int type = EVT_TOUCH_DOWN;
+  widget_t* widget = loop->base.wm;
+  SDL_TouchFingerEvent* finger_event = (SDL_TouchFingerEvent*)sdl_event;
+
+  memset(&event, 0x00, sizeof(event));
+  switch (sdl_event->type) {
+    case SDL_FINGERDOWN: {
+      type = EVT_TOUCH_DOWN;
+      break;
+    }
+    case SDL_FINGERUP: {
+      type = EVT_TOUCH_UP;
+      break;
+    }
+    case SDL_FINGERMOTION: {
+      type = EVT_TOUCH_MOVE;
+      break;
+    }
+    default:
+      break;
+  }
+
+  e = touch_event_init(&event, type, widget, finger_event->touchId, finger_event->fingerId,
+                       finger_event->x, finger_event->y, finger_event->pressure);
+
+  if (e != NULL) {
+    widget_t* win = window_manager_get_top_window(widget);
+    widget_dispatch(win, e);
+  }
+
+  log_debug("touch event: type=%d touch_id=% " PRId64 " finger_id=%" PRId64 "  x=%f y=%f\n", type,
+            event.touch_id, event.finger_id, event.x, event.y);
+
+  return RET_OK;
+}
+
 static ret_t main_loop_sdl2_dispatch_mouse_event(main_loop_simple_t* loop, SDL_Event* sdl_event) {
   key_event_t key_event;
   pointer_event_t event;
@@ -317,6 +356,12 @@ ret_t main_loop_sdl2_dispatch(main_loop_simple_t* loop) {
         ret = main_loop_sdl2_dispatch_mouse_event(loop, &event);
         break;
       }
+      case SDL_FINGERDOWN:
+      case SDL_FINGERUP:
+      case SDL_FINGERMOTION: {
+        ret = main_loop_sdl2_dispatch_touch_event(loop, &event);
+        break;
+      }
       case SDL_TEXTINPUT: {
         ret = main_loop_sdl2_dispatch_text_input(loop, &event);
         break;