Flutter OHOS flutter_custom_cursor(自定义光标)

flutter_custom_cursor

该插件允许直接从内存缓冲区创建/设置自定义鼠标光标。

使用

1.先注册自定义光标

// register this cursor
cursorName = await CursorManager.instance.registerCursor(CursorData()
  ..name = "test"
  ..buffer =
  Platform.isWindows ? memoryCursorDataRawBGRA : memoryCursorDataRawPNG
  ..height = img.height
  ..width = img.width
  ..hotX = 0
  ..hotY = 0);

cacheName注意，该函数将返回一个字符串registerCursor，可用于将此游标设置为系统或者删除此游标。

2.设置自定义光标

我们已经实现了FlutterCustomMemoryImageCursor类，它是 的子类MouseCursor。该类将自动为您设置内存光标。保持简单。

MouseRegion(
  cursor: FlutterCustomMemoryImageCursor(key: cursorName),
  child: Row(
children: [
  Text("Memory image here", style: style),
],
  ),
),

3.删除光标

await CursorManager.instance.deleteCursor("cursorName");

鸿蒙OS代码

创建光标

createCustomCursor(name: string, buffer: ArrayBufferLike, hotX: number, hotY: number): string | null {
try {
  let imgSource = image.createImageSource(buffer)
  let customCursor: CustomCursor = {
pixelMap: imgSource.createPixelMapSync(), focusX: hotX, focusY: hotY
  }
  this.caches.set(name, customCursor)
} catch (e) {
  Log.e(TAG, "Catch: createCustomCursor Error : " + JSON.stringify(e));
  return null
}
return name
  }

设置光标

setCustomCursor(name: string): boolean {
try {
  if (!this.caches.has(name)) {
return false
  }
  let cursor = this.caches.get(name)
  if (cursor != undefined) {
pointer.setCustomCursorSync(
  this.mainWindow?.getWindowProperties().id,
  cursor.pixelMap,
  cursor.focusX,
  cursor.focusY)
  } else {
return false
  }
} catch (e) {
  Log.i(TAG, "Catch: setCustomCursor Error : " + JSON.stringify(e));
  return false
}
return true
  }

删除

deleteCustomCursor(name: string): boolean {
if (!this.caches.has(name)) {
  return false
}
try {
  this.caches.get(name)?.pixelMap.release()
  this.caches.delete(name)
} catch (e) {
  Log.i(TAG, "Catch: deleteCustomCursor Error : " + JSON.stringify(e));
  return false
}
return true
  }