{"id":628,"date":"2021-12-15T15:44:00","date_gmt":"2021-12-15T07:44:00","guid":{"rendered":"https:\/\/closer.cclo.idv.tw\/?p=628"},"modified":"2022-10-26T12:22:54","modified_gmt":"2022-10-26T04:22:54","slug":"%e5%9c%a8-wxwidgets-%e4%b8%ad%e5%9f%b7%e8%a1%8c%e7%b9%81%e9%87%8d%e5%b7%a5%e4%bd%9c%e6%99%82%e4%b8%8d%e8%ae%93-ui-%e5%87%8d%e7%b5%90%e7%9a%84%e4%bd%9c%e6%b3%95","status":"publish","type":"post","link":"https:\/\/blog.cclo.idv.tw\/?p=628","title":{"rendered":"\u5728 wxWidgets \u4e2d\u57f7\u884c\u7e41\u91cd\u5de5\u4f5c\u6642\u4e0d\u8b93 UI \u51cd\u7d50\u7684\u4f5c\u6cd5"},"content":{"rendered":"\n

\u6211\u60f3\u8981\u7528 wxWidgets \u5beb\u4e00\u500b\u7a0b\u5f0f\uff0c\u80fd\u5920\u6383\u7784\u6574\u500b\u76ee\u9304\u7d50\u69cb\uff0c\u7136\u5f8c\u628a\u4e0d\u9700\u8981\u7684\u6a94\u6848\u522a\u6389\u3002\u6383\u7784\u9019\u4ef6\u4e8b\u60c5\u53ef\u4ee5\u7528\u905e\u8ff4\u4f86\u505a\uff1a<\/p>\n\n\n

void<\/span> MainFrame::RecursiveClean<\/span>(const<\/span> wxString& dirname)<\/span> <\/span>{\n<\/span><\/span>  wxDir dir<\/span>(dirname)<\/span><\/span>;\n<\/span><\/span>  if<\/span> (!dir.IsOpened()) {\n<\/span><\/span>    return<\/span>;\n<\/span><\/span>  }\n<\/span><\/span>  wxString name;\n<\/span><\/span>  wxFileName fn<\/span>(dirname, \"\"<\/span>)<\/span><\/span>;\n<\/span><\/span>  bool<\/span> found = dir.GetFirst(&name);\n<\/span><\/span>  while<\/span> (found) {\n<\/span><\/span>    wxString fullpath = fn.GetPathWithSep() + name;\n<\/span><\/span>    if<\/span> (wxDirExists(fullpath)) {\n<\/span><\/span>      if<\/span> (delete_folder_patterns_.Match(name)) {\n<\/span><\/span>        \/\/ ...delete folder...<\/span>\n<\/span><\/span>      } else<\/span> {\n<\/span><\/span>        RecursiveClean(fullpath);\n<\/span><\/span>      }\n<\/span><\/span>    } else<\/span> if<\/span> (wxFileExists(fullpath)) {\n<\/span><\/span>      if<\/span> (delete_file_patterns_.Match(name)) {\n<\/span><\/span>        \/\/ ...delete file...<\/span>\n<\/span><\/span>      }\n<\/span><\/span>    }\n<\/span><\/span>    found = dir.GetNext(&name);\n<\/span><\/span>  }\n<\/span><\/span>}\n<\/span><\/span><\/code><\/span>Code language:<\/span> C++<\/span> (<\/span>cpp<\/span>)<\/span><\/small><\/pre>\n\n\n
\u4f46\u6383\u7784\u7684\u904e\u7a0b\u5f88\u82b1\u6642\u9593\u3002\u5982\u679c\u6211\u5011\u5c31\u76f4\u63a5\u9019\u6a23\u786c\u5e79\uff0c\u5728\u6383\u7784\u7684\u904e\u7a0b\u4e2d\uff0cwxWidgets \u5c31\u6c92\u6709\u8fa6\u6cd5\u8655\u7406\u4e8b\u4ef6\uff0c\u5c0e\u81f4\u6574\u500b UI \u5c31\u6703\u505c\u5728\u90a3\u908a\u6c92\u6709\u53cd\u61c9\u3002\u6240\u4ee5\u6211\u5011\u8981\u60f3\u500b\u65b9\u6cd5\u53bb\u89e3\u6c7a\u3002<\/p>\n\n\n\n\n\n\n\n
\u5229\u7528 wxEVT_IDLE<\/code><\/h2>\n<\/div>\n\n\n\n
\u5176\u5be6\u6700\u7d42\u6975\u7684\u65b9\u6cd5\u61c9\u8a72\u662f\u628a\u6383\u7784\u653e\u5230\u53e6\u4e00\u500b thread \u53bb\u505a\uff1b\u4f46\u5149\u662f\u60f3\u5230 thread \u4e4b\u9593\u8981\u600e\u9ebc\u59a5\u5584\u50b3\u905e\u8a0a\u606f\u5c31\u982d\u76ae\u767c\u9ebb\u3002\u6240\u4ee5\u5c31\u60f3\u8aaa\u5148\u8a66\u8457\u5728 wxIdleEvent<\/code> \u7684 handler \u88e1\u9762\u505a\u3002<\/p>\n\n\n\n
wxWidgets \u7684\u7cfb\u7d71\u5728\u6c92\u6709\u5176\u4ed6\u4e8b\u4ef6\u8981\u8655\u7406\u7684\u6642\u5019\uff0c\u5c31\u6703\u9001\u51fa wxIdleEvent<\/code>\u3002\u4f46\u9810\u8a2d\u7684\u884c\u70ba\uff0c\u662f\u300c\u5f9e busy \u8b8a\u6210 idle\u300d\u6642\uff0c\u624d\u6703\u9001\u4e00\u6b21 event\uff0c\u800c\u4e0d\u6703\u9023\u7e8c\u9001\u51fa\u3002\u6240\u4ee5\uff0c\u5982\u679c\u6211\u5011\u5e0c\u671b wxWidgets \u6301\u7e8c\u9001\u51fa\u7684\u8a71\uff0c\u53ef\u4ee5\u5728 wxIdleEvent<\/code> \u7684 handler \u88e1\uff0c\u547c\u53eb wxIdleEvent::RequestMore()<\/code>\uff0c\u9019\u6a23 wxWidgets \u5c31\u6703\u518d\u9001\u51fa\u4e0b\u4e00\u500b wxIdleEvent<\/code>\u3002<\/p>\n\n\n\n
\u53e6\u5916\uff0c\u70ba\u4e86\u8981\u628a\u63a7\u5236\u6b0a\u9084\u7d66\u7cfb\u7d71\uff0c\u6211\u5011\u5fc5\u9808\u8981\u628a\u4efb\u52d9\u7d30\u5207\uff1a\u6bcf\u4e00\u6b21\u547c\u53eb wxIdleEvent<\/code> \u7684 handler \u7684\u6642\u5019\uff0c\u53ea\u57f7\u884c\u4efb\u52d9\u7684\u4e00\u5c0f\u90e8\u4efd\u5c31\u7d50\u675f\u51fd\u5f0f\uff0c\u8b93 wxWidgets \u6709\u6a5f\u6703\u8655\u7406\u5176\u4ed6\u7684\u4e8b\u4ef6\u3002\u901a\u5e38\u9019\u6703\u662f\u6700\u7d2f\u7684\u5de5\u4f5c\u3002\u5982\u679c\u539f\u672c\u7684\u4efb\u52d9\u662f\u4ee5\u8ff4\u5708\u65b9\u5f0f\u57f7\u884c\u9084\u597d\uff1b\u50cf\u73fe\u5728\u9019\u500b\u4f8b\u5b50\uff0c\u7528\u5230\u905e\u8ff4\uff0c\u5c31\u6709\u9ede\u9ebb\u7169\u4e86\u3002<\/p>\n\n\n\n
\u6211\u4f7f\u7528\u7684\u65b9\u6cd5\uff0c\u662f\u5229\u7528 std::vector<\/code> \u6a21\u64ec stack\uff0c\u8a18\u9304\u6b63\u5728\u8655\u7406\u7684\u76ee\u9304\u3002Stack \u7684\u6700\u4e0a\u5c64\u662f\u76ee\u524d\u6b63\u5728\u8655\u7406\u7684\u76ee\u9304\u3002\u7576\u7a0b\u5f0f\u5728\u9019\u500b\u76ee\u9304\u4e2d\u6383\u5230\u5b50\u76ee\u9304\u3001\u8981\u5f80\u88e1\u9762\u6df1\u5165\u6642\uff0c\u5c31\u628a\u8981\u8655\u7406\u7684\u76ee\u9304\u518d\u5f80 stack \u4e0a\u5c64\u585e\uff1b\u7b49\u5230\u6700\u4e0a\u5c64\u7684\u76ee\u9304\u90fd\u8655\u7406\u5b8c\u4e86\uff0c\u5c31\u628a\u5b83 pop \u51fa\u4f86\uff0c\u7e7c\u7e8c\u8655\u7406\u524d\u4e00\u5c64\u76ee\u9304\u3002\u5176\u5be6\u76f8\u7576\u65bc\u6a21\u64ec\u905e\u8ff4\u7684\u884c\u70ba\u3002<\/p>\n\n\n\n
Pseudo code \u5982\u4e0b\uff1a <\/p>\n\n\n
class MyFrame::wxFrame<\/span>()<\/span> <\/span>{\n  std<\/span>::vector<\/span><Directory> stack<\/span>;\n  \/\/....<\/span>\n  void<\/span> ProcessSingleItem<\/span>(void<\/span>)<\/span><\/span>;\n  void<\/span> OnIdle<\/span>(wxIdleEvent& evt)<\/span><\/span>;\n}\n\nvoid<\/span> MyFrame::OnIdle<\/span>(wxIdleEvent& evt)<\/span> <\/span>{\n  if<\/span> (ProcessSingleItem()) {\n    Unbind(wxEVT_IDLE, &CleanStatusDialog::OnIdle, this<\/span>);\n  } else<\/span> {\n    \/\/ Add this for more performance<\/span>\n    evt.RequestMore();\n  }\n}\n\n\/\/ Returns true if scanning task is done.<\/span>\nvoid<\/span> MyFrame::ProcessSingleItem<\/span>(void<\/span>)<\/span> <\/span>{\n  if<\/span> (stack<\/span>.empty()) {\n    return<\/span> true<\/span>;\n  }\n\n  wxString item_name;\n  Directory& top = stack<\/span>.back();\n  bool<\/span> found = top.FindNextItem(&item_name);\n\n  if<\/span> (found) {\n    wxString full_path = top.GetName() + item_name;\n    if<\/span> (is_dir(full_path)) {\n      if<\/span> (delete_folder_patterns_.Match(full_path)) {\n        \/\/ ...delete folder...<\/span>\n      } else<\/span> {\n        Directory new_dir = Directory(full_path);\n        stack<\/span>.push_back(new_dir);\n      }\n    } else<\/span> if<\/span> (is_file(fullpath)) {\n      if<\/span> (delete_file_patterns_.Match(full_path)) {\n        \/\/ ...delete file...<\/span>\n      }\n    }\n  } else<\/span> {\n    stack<\/span>.pop_back();\n  }\n\n  return<\/span> false<\/span>;\n}<\/code><\/span>Code language:<\/span> C++<\/span> (<\/span>cpp<\/span>)<\/span><\/small><\/pre>\n\n\n
\u4e4b\u6240\u4ee5\u7528 pseudo code \u5448\u73fe\u3001\u800c\u4e14\u7528 Directory<\/code> \u9019\u500b\u300c\u5047\u7684\u300dclass \u800c\u4e0d\u662f\u76f4\u63a5\u7528 wxDir<\/code>\uff0c\u662f\u56e0\u70ba\u9084\u6709\u5e7e\u500b\u5be6\u4f5c\u4e0a\u7684\u554f\u984c\u8981\u89e3\u6c7a\uff1a<\/p>\n
    \n
  1. wxDir<\/code> \u7269\u4ef6\u7121\u6cd5\u88ab\u8907\u88fd\uff08\u5b83\u7684 copy constructor \u88ab\u96b1\u85cf\u8d77\u4f86\u4e86\uff09\uff0c\u6240\u4ee5\u7121\u6cd5\u76f4\u63a5\u7528 std::vector<\/code> \u5132\u5b58\u7ba1\u7406\u3002\u89e3\u6c7a\u7684\u65b9\u6cd5\u662f\u6539\u5b58\u6307\u6a19\uff0c\u4e5f\u5c31\u662f\u628a stack<\/code> \u7684\u578b\u5225\u6539\u6210 std::vector<wxDir*><\/code>\uff0c\u6216\u662f std::vector<std::unique_ptr<wxDir>><\/code>\u3002<\/li>\n
  2. \u5982\u679c\u7b2c\u4e00\u9ede\u662f\u63a1\u7528 unique_ptr<wxDir><\/code> \u7684\u8a71\uff0c\u90a3\u5728\u547c\u53eb std::vector<>::push_back()<\/code> \u7684\u6642\u5019\uff0c\u8981\u4f7f\u7528 std::move()<\/code>\u3002\u4f8b\u5982\uff1a
    auto new_dir = make_unique<wxDir>(full_path);\nstack.push_back(move(new_dir));\n<\/code><\/pre>\n<\/li>\n
  3. \u7576\u6211\u5011\u60f3\u900f\u904e wxDir<\/code> \u53d6\u5f97\u76ee\u9304\u4e2d\u7684\u6a94\u6848\uff08\u6216\u5b50\u76ee\u9304\uff09\u7684\u540d\u7a31\u6642\uff0c\u6211\u5011\u4e00\u958b\u59cb\u5fc5\u9808\u5148\u7528 wxDir::GetFirst()<\/code> \u53d6\u5f97\u7b2c\u4e00\u500b\u6a94\u540d\uff0c\u7136\u5f8c\u6539\u7528 wxDir::GetNext()<\/code> \u4f9d\u6b21\u53d6\u5f97\u5f8c\u9762\u7684\u6a94\u540d\u3002\u56e0\u6b64\u6211\u5011\u5fc5\u9808\u6709\u984d\u5916\u7684\u6a5f\u5236\u8a18\u9304\u9019\u662f\u4e0d\u662f\u7b2c\u4e00\u6b21\u547c\u53eb\u3002<\/li>\n
  4. \u5982\u679c\u65b0\u7684 wxDir<\/code> \u7269\u4ef6\u5efa\u7acb\u5931\u6557\u7684\u8a71\uff0c\u61c9\u8a72\u8981\u80fd\u7acb\u5373\u7d42\u6b62\u6574\u500b\u6383\u7784\u5de5\u4f5c\u3002<\/li>\n<\/ol>\n<\/div>\n\n\n\n
    <\/p>\n\n\n\n
    \u4f7f\u7528 wxThread \u57f7\u884c\u6383\u7784\u4efb\u52d9<\/h2>\n\n\n\n
     wxWidgets \u63d0\u4f9b\u4e86\u5169\u7a2e\u4e0d\u540c\u7684 thread \u6a21\u578b\uff1adetached\uff08\u9810\u8a2d\uff09\u548c joinable\u3002\u6211\u63a1\u7528 detached thread \u4f86\u5be6\u4f5c\u3002\u4e0d\u904e detached thread \u5728\u4f7f\u7528\u4e0a\u6709\u5e7e\u500b\u9700\u8981\u6ce8\u610f\u7684\u5730\u65b9\uff1a<\/p>\n\n\n\n
    1. Sub thread \u5728\u57f7\u884c\u7d50\u675f\u5f8c\u6703\u81ea\u6211\u92b7\u6bc0\uff08\u4e5f\u5c31\u662f\u81ea\u5df1 delete<\/code> \u81ea\u5df1\uff09\u3002\u96d6\u7136\u597d\u8655\u662f\u4e0d\u7528 main thread \u64cd\u5fc3\uff0c\u4f46\u82e5\u662f\u6211\u5011\u9700\u8981\u5728 main thread \u4e2d\u4fdd\u7559\u4e00\u4efd\u6307\u5411\u9019\u500b thread \u7684\u6307\u6a19\uff0c\u90a3\u6211\u5011\u5c31\u5fc5\u9808\u975e\u5e38\u5c0f\u5fc3\uff0c\u56e0\u70ba\u9019\u500b\u6307\u6a19\u96a8\u6642\u53ef\u80fd\u56e0\u70ba thread \u5df2\u7d93\u57f7\u884c\u7d50\u675f\u800c\u5931\u6548\u3002
      \u6211\u5011\u7684\u89e3\u6c7a\u65b9\u6cd5\uff0c\u662f\u8b93 sub thread \u4e5f\u4fdd\u7559\u4e00\u4efd\u6307\u5411 parent \u7684\u6307\u6a19\uff0c\u7136\u5f8c\u5728 thread \u7684\u89e3\u69cb\u5f0f\u4e2d\uff0c\u60f3\u8fa6\u6cd5\u60f3\u81ea\u5df1\u7684\u6307\u6a19\u6e05\u70ba nullptr<\/code>\u3002<\/li>
    2. \u7576 main thread \u60f3\u8981\u900f\u904e thread \u7684\u6307\u6a19\u53bb\u5b58\u53d6\u6642\uff08\u4f8b\u5982\u53bb\u547c\u53eb wxThread::Delete()<\/code>\uff0c\u901a\u77e5 thread \u5fc5\u9808\u63d0\u524d\u7d50\u675f\uff09\uff0c\u5fc5\u9808\u8981\u7528 critical section \u4fdd\u8b77\u597d\uff0c\u5426\u5247\u53ef\u80fd\u6703\u767c\u751f data racing \u7684\u554f\u984c\u3002<\/li>
    3. Sub thread \u8981\u50b3\u905e\u8a0a\u606f\u7d66 main thread\uff0c\u53ef\u4ee5\u5229\u7528
      1.  wxEvtHandler::QueueEvent()<\/code> \u50b3\u905e\u6a19\u6e96\uff08\u6216\u81ea\u5b9a\u7fa9\uff09\u7684\u4e8b\u4ef6\uff0c\u6709\u8cc7\u6599\u7684\u8a71\u53ef\u4ee5\u653e\u5728\u4e8b\u4ef6\u7269\u4ef6\u7684\u6b04\u4f4d\u4e2d\u3002\u4f46\u8981\u7279\u5225\u5c0f\u5fc3 wxString<\/code> \u7269\u4ef6\uff0c\u56e0\u70ba wxString<\/code> \u5167\u90e8\u4f7f\u7528 reference count \u6280\u8853\uff0c\u4e26\u4e0d\u7b26\u5408 thread-safe \u7684\u898f\u7bc4\u3002<\/li>
      2. wxWidgets 3.0 \u4e4b\u5f8c\u63d0\u4f9b\u4e86 wxEvtHandler::CallAfter()<\/code> \u9019\u500b\u51fd\u5f0f\uff0c\u53ef\u4ee5\u76f4\u63a5\u50b3\u5165\u6210\u54e1\u51fd\u5f0f\u7684\u6307\u6a19\uff08\u4ee5\u53ca\u7c21\u55ae\u7684\u53c3\u6578\uff09\u3001\u6216\u662f\u51fd\u5f0f\u7269\u4ef6\u3002\u7b49\u5230\u63a7\u5236\u6b0a\u56de\u5230 main thread \u6642\uff0cmain thread \u624d\u6703\u53bb\u57f7\u884c\u9019\u500b\u6210\u54e1\u51fd\u5f0f\u3002<\/li><\/ol><\/li><\/ol>\n\n\n\n
        Thread \u9019\u500b\u4e3b\u984c\u5be6\u5728\u662f\u592a\u9f90\u5927\u3002\u518d\u627e\u6642\u9593\u5beb\u53e6\u4e00\u7bc7\u6587\u7ae0\u4f86\u8a0e\u8ad6\u597d\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
        \u5beb GUI \u7684\u7a0b\u5f0f\u6642\uff0c\u5982\u679c\u8981\u9577\u6642\u9593\u57f7\u884c\u7e41\u91cd\u7684\u5de5\u4f5c\uff0c\u5f88\u5bb9\u6613\u8b93 GUI \u51cd\u7d50\u6c92\u6709\u53cd\u61c9\u3002\u5982\u679c\u4f60\u7528\u7684 GUI framework \u662f wxWidgets \u7684\u8a71\uff0c\u6709\u4e00\u4e9b\u53ef\u4ee5\u5617\u8a66\u7684 workaround…<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[13],"tags":[25,63,64,62],"table_tags":[],"class_list":["post-628","post","type-post","status-publish","format-standard","hentry","category--computer-science","tag-concurrency","tag-gui","tag-windows","tag-wxwidgets"],"aioseo_notices":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/blog.cclo.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/628","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.cclo.idv.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.cclo.idv.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.cclo.idv.tw\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.cclo.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=628"}],"version-history":[{"count":19,"href":"https:\/\/blog.cclo.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/628\/revisions"}],"predecessor-version":[{"id":676,"href":"https:\/\/blog.cclo.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/628\/revisions\/676"}],"wp:attachment":[{"href":"https:\/\/blog.cclo.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=628"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.cclo.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=628"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.cclo.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=628"},{"taxonomy":"table_tags","embeddable":true,"href":"https:\/\/blog.cclo.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftable_tags&post=628"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}