Harmony port: touch event

Author: Jack253-png

src/core/ohos/SDL_ohos.c

@@ -1,3 +1,4 @@
+#include "SDL3/SDL_events.h"
 #include "SDL_internal.h"
 #include <EGL/egl.h>
 #include <EGL/eglplatform.h>
@@ -14,6 +15,7 @@
 #include "SDL_ohos.h"
 #include <ace/xcomponent/native_interface_xcomponent.h>
 #include "../../video/ohos/SDL_ohosvideo.h"
+#include "../../video/ohos/SDL_ohostouch.h"
 #include "SDL3/SDL_mutex.h"
 #include "../../video/ohos/SDL_ohoskeyboard.h"
 
@@ -355,10 +357,51 @@ static void onKeyEvent(OH_NativeXComponent *component, void *window)
     }
 }
 
+static void onNativeTouch(OH_NativeXComponent *component, void *window)
+{
+    OH_NativeXComponent_TouchEvent touchEvent;
+    OH_NativeXComponent_TouchPointToolType toolType = OH_NATIVEXCOMPONENT_TOOL_TYPE_UNKNOWN;
+
+    OHOS_LockPage();
+    OH_NativeXComponent_GetTouchEvent(component, window, &touchEvent);
+    OH_NativeXComponent_GetTouchPointToolType(component, 0, &toolType);
+
+    for (int i = 0; i < touchEvent.numPoints; i++)
+    {
+        SDL_OHOSTouchEvent e;
+        e.timestamp = touchEvent.timeStamp;
+        e.deviceId = touchEvent.deviceId;
+        e.fingerId = touchEvent.touchPoints[i].id;
+        e.area = touchEvent.touchPoints[i].size;
+        e.x = touchEvent.touchPoints[i].x / (float)wid;
+        e.y = touchEvent.touchPoints[i].y / (float)hei;
+        e.p = touchEvent.touchPoints[i].force;
+
+        switch (touchEvent.touchPoints[i].type) {
+            case OH_NATIVEXCOMPONENT_DOWN:
+                e.type = SDL_EVENT_FINGER_DOWN;
+                break;
+            case OH_NATIVEXCOMPONENT_MOVE:
+                e.type = SDL_EVENT_FINGER_MOTION;
+                break;
+            case OH_NATIVEXCOMPONENT_UP:
+                e.type = SDL_EVENT_FINGER_UP;
+                break;
+            case OH_NATIVEXCOMPONENT_CANCEL:
+            case OH_NATIVEXCOMPONENT_UNKNOWN:
+                e.type = SDL_EVENT_FINGER_CANCELED;
+                break;
+        }
+
+        OHOS_OnTouch(e);
+    }
+}
+static void OnDispatchTouchEventCB(OH_NativeXComponent *component, void *window)
+{
+    onNativeTouch(component, window);
+}
 // TODO
-static void onNativeTouch(OH_NativeXComponent *component, void *window) {}
 static void onNativeMouse(OH_NativeXComponent *component, void *window) {}
-static void OnDispatchTouchEventCB(OH_NativeXComponent *component, void *window) {}
 static void OnHoverEvent(OH_NativeXComponent *component, bool isHover) {}
 static void OnFocusEvent(OH_NativeXComponent *component, void *window) {}
 static void OnBlurEvent(OH_NativeXComponent *component, void *window) {}

src/core/ohos/SDL_ohos.h

@@ -1,7 +1,6 @@
 #ifndef SDL_OHOS_H
 #define SDL_OHOS_H
 
-#include "SDL3/SDL_mutex.h"
 #include "SDL3/SDL_video.h"
 #include "video/SDL_sysvideo.h"
 #include <native_window/external_window.h>
@@ -19,4 +18,15 @@ typedef struct SDL_VideoData {
     int      isPausing;
 } SDL_VideoData;
 
+typedef struct SDL_OHOSTouchEvent {
+    int64_t deviceId;
+    int32_t fingerId;
+    int type;
+    float x;
+    float y;
+    float p;
+    float area;
+    int64_t timestamp;
+} SDL_OHOSTouchEvent;
+
 #endif

src/video/ohos/SDL_ohostouch.c

@@ -0,0 +1,31 @@
+#include "../../core/ohos/SDL_ohos.h"
+#include "SDL3/SDL_events.h"
+#include "SDL3/SDL_touch.h"
+#include "events/SDL_events_c.h"
+void OHOS_OnTouch(SDL_OHOSTouchEvent event)
+{
+    if (SDL_AddTouch(event.deviceId, SDL_TOUCH_DEVICE_DIRECT, "") < 0)
+    {
+        SDL_Log("Cannot add touch");
+        return;
+    }
+
+    switch (event.type) {
+        case SDL_EVENT_FINGER_DOWN: {
+            SDL_SendTouch(event.timestamp, event.deviceId, event.fingerId, NULL, SDL_EVENT_FINGER_DOWN, event.x, event.y, event.p);
+            break;
+        }
+        case SDL_EVENT_FINGER_MOTION: {
+            SDL_SendTouchMotion(event.timestamp, event.deviceId, event.fingerId, NULL, event.x, event.y, event.p);
+            break;
+        }
+        case SDL_EVENT_FINGER_UP: {
+            SDL_SendTouch(event.timestamp, event.deviceId, event.fingerId, NULL, SDL_EVENT_FINGER_UP, event.x, event.y, event.p);
+            break;
+        }
+        case SDL_EVENT_FINGER_CANCELED: {
+            SDL_SendTouch(event.timestamp, event.deviceId, event.fingerId, NULL, SDL_EVENT_FINGER_CANCELED, event.x, event.y, event.p);
+            break;
+        }
+    }
+}

src/video/ohos/SDL_ohostouch.h

@@ -0,0 +1,9 @@
+#ifndef SDL_OHOSTOUCH_H
+#define SDL_OHOSTOUCH_H
+
+#include "SDL_internal.h"
+#include "../../core/ohos/SDL_ohos.h"
+
+void OHOS_OnTouch(SDL_OHOSTouchEvent event);
+
+#endif