鼠标键盘xml动作文件的加载过程_利用xml控制鼠标-优快云博客

本文链接：https://blog.youkuaiyun.com/fofu33/article/details/46300941

本文详细介绍了XBMC（Kodi）启动时如何加载keyboard.xml文件，以及解析XML中如VolumeUp等按键动作的过程。通过Debug Print，我们关注到加载特殊路径下的keyboard.xml。接着，文章深入到MapWindowActions函数，解析XML节点，匹配XBMCKEYTABLE结构体，找到对应的vkey值。在MapAction方法中，将buttonCode和action映射，例如ACTION_VOLUME_UP。整个过程揭示了XBMC如何处理不同输入设备的控制指令。

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在xbmc初次启动中我们说到CApplication::CreateGUI()中的加载按键定义文件，这里我们拿keyboard.xml举例

bool CButtonTranslator::Load(bool AlwaysLoad)
{
  m_translatorMap.clear();

  // Directories to search for keymaps. They're applied in this order,
  // so keymaps in profile/keymaps/ override e.g. system/keymaps
  static const char* DIRS_TO_CHECK[] = {
    "special://xbmc/system/keymaps/",
    "special://masterprofile/keymaps/",
    "special://profile/keymaps/"
  };
  for (unsigned int dirIndex = 0; dirIndex < ARRAY_SIZE(DIRS_TO_CHECK); ++dirIndex)
  {
    if (XFILE::CDirectory::Exists(DIRS_TO_CHECK[dirIndex]))
    {
      CFileItemList files;
      XFILE::CDirectory::GetDirectory(DIRS_TO_CHECK[dirIndex], files, ".xml");
      // Sort the list for filesystem based priorities, e.g. 01-keymap.xml, 02-keymap-overrides.xml
      files.Sort(SortByFile, SortOrderAscending);
      for(int fileIndex = 0; fileIndex<files.Size(); ++fileIndex)
      {
        if (!files[fileIndex]->m_bIsFolder)
          success |= LoadKeymap(files[fileIndex]->GetPath());
      }

      // Load mappings for any HID devices we have connected
      std::list<std::string>::iterator it;
      for (it = m_deviceList.begin(); it != m_deviceList.end(); it++)
      {
        std::string devicedir = DIRS_TO_CHECK[dirIndex];
        devicedir.append(*it);
        devicedir.append("/");
        if( XFILE::CDirectory::Exists(devicedir) )
        {
          CFileItemList files;
          XFILE::CDirectory::GetDire