HarmonyOS 是否可以提供使用CAPI进行自定义组件的demo

demo示例代码:

#include <functional>
#include "ArkUI/native_interface.h"
#include "ArkUI/native_node.h"
#include "ArkUI/native_type.h"
#include "drawing_canvas.h"
#include "drawing_color.h"
#include "drawing_path.h"
#include "drawing_pen.h"
#include "drawing_types.h"
struct UserCallback {
  std::function<void(ArkUI_NodeCustomEvent* event)> callback;
};
class ArkUINativeModule {
  public:
    ArkUINativeModule()
  {
  OH_ArkUI_QueryModuleInterface(ARKUI_NATIVE_NODE, ArkUI_NativeNodeAPI_1, nodeApi_);
  // 统一入口函数处理事件。
  nodeApi_->registerNodeCustomEventReceiver([](ArkUI_NodeCustomEvent* event) {
  auto* userData = reinterpret_cast<UserCallback*>(OH_ArkUI_NodeCustomEvent_GetUserData(event));
  userData->callback(event);
});
}
~ArkUINativeModule()
{
  nodeApi_->unregisterNodeCustomEventReceiver();
}
static ArkUINativeModule* GetInstance()
{
  static ArkUINativeModule nativeModule;
  return &nativeModule;
}
ArkUI_NativeNodeAPI_1* GetNodeAPI()
{
  return nodeApi_;
}
private:
  ArkUI_NativeNodeAPI_1* nodeApi_ = nullptr;
};
class MyBadge {
  public:
    MyBadge()
  {
  nativeModule_ = ArkUINativeModule::GetInstance()->GetNodeAPI();
  handle_ = nativeModule_->createNode(ARKUI_NODE_CUSTOM);
  userCallback_ = new UserCallback();
  // 设置自定义回调。
  userCallback_->callback = [this](ArkUI_NodeCustomEvent* event) {
  auto type = OH_ArkUI_NodeCustomEvent_GetEventType(event);
  switch (type) {
case ARKUI_NODE_CUSTOM_EVENT_ON_MEASURE:
OnMeasure(event);
break;
  case ARKUI_NODE_CUSTOM_EVENT_ON_LAYOUT:
  OnLayout(event);
  break;
  case ARKUI_NODE_CUSTOM_EVENT_ON_FOREGROUND_DRAW:
  OnForegroundDraw(event);
  break;
  default:
    break;
}
};
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