Merge branch 'zxw/support_editor_dragdrop' of github.com:Unity-Technologies/com.unity.uiwidgets into zxw/support_editor_dragdrop

Author: zhuxingwei

com.unity.uiwidgets/Runtime/Plugins/x86_64/libUIWidgets.dll

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:74a8add2eb68589ffdde29bf411e53530415b618aaeee9a55fce80ad937aa4d9
-size 11260928
+oid sha256:31f3c8fade90589311b6ede144e1618ccfcc94e8d4692a0cdf07628b345d2aa2
+size 11260416

engine/src/shell/platform/unity/windows/uiwidgets_panel.cc

@@ -433,6 +433,32 @@ void UIWidgetsPanel::OnScroll(float x, float y, float px, float py) {
   }
 }
 
+void UIWidgetsPanel::OnDragUpdateInEditor(float x, float y)
+{
+  if (process_events_) {
+    UIWidgetsPointerEvent event = {};
+    event.x = x;
+    event.y = y;
+    SetEventPhaseFromCursorButtonState(&event);
+    event.signal_kind = UIWidgetsPointerSignalKind::kUIWidgetsPointerSignalKindEditorDragUpdate;
+
+    SendPointerEventWithData(event);
+  }
+}
+
+void UIWidgetsPanel::OnDragReleaseInEditor(float x, float y)
+{
+  if (process_events_) {
+    UIWidgetsPointerEvent event = {};
+    event.x = x;
+    event.y = y;
+    SetEventPhaseFromCursorButtonState(&event);
+    event.signal_kind = UIWidgetsPointerSignalKind::kUIWidgetsPointerSignalKindEditorDragRelease;
+
+    SendPointerEventWithData(event);
+  }
+}
+
 static uint64_t ConvertToUIWidgetsButton(int button) {
   switch (button) {
     case -1:
@@ -569,4 +595,21 @@ UIWIDGETS_API(void)
 UIWidgetsPanel_onScroll(UIWidgetsPanel* panel, float x, float y, float px, float py) {
   panel->OnScroll(x, y, px, py);
 }
+
+UIWIDGETS_API(void)
+UIWidgetsPanel_onDragUpdateInEditor(UIWidgetsPanel* panel, float x, float y) {
+  if (!panel->NeedUpdateByEditorLoop()) {
+    return;
+  }
+  panel->OnDragUpdateInEditor(x, y);
+}
+
+UIWIDGETS_API(void)
+UIWidgetsPanel_onDragReleaseInEditor(UIWidgetsPanel* panel, float x, float y) {
+  if (!panel->NeedUpdateByEditorLoop()) {
+    return;
+  }
+  panel->OnDragReleaseInEditor(x, y);
+}
+
 }  // namespace uiwidgets

engine/src/shell/platform/unity/windows/uiwidgets_panel.h

@@ -69,6 +69,11 @@ class UIWidgetsPanel : public fml::RefCountedThreadSafe<UIWidgetsPanel> {
 
   void OnMouseLeave();
 
+  void OnDragUpdateInEditor(float x, float y);
+
+  void OnDragReleaseInEditor(float x, float y);
+
+
   bool NeedUpdateByPlayerLoop();
 
   bool NeedUpdateByEditorLoop();