{"action":"created","comment":{"url":"https://api.github.com/repos/flutter/flutter/pulls/comments/44298584","id":44298584,"diff_hunk":"@@ -14,7 +14,52 @@ import 'material.dart';\n \n const Duration _kBottomSheetDuration = const Duration(milliseconds: 200);\n const double _kMinFlingVelocity = 700.0;\n-const double _kFlingVelocityScale = 1.0 / 300.0;\n+const double _kCloseProgressThreshold = 0.5;\n+\n+class _BottomSheetDragController extends StatelessComponent {\n+  _BottomSheetDragController({\n+    Key key,\n+    this.performance,\n+    this.child,\n+    this.childHeight\n+  }) : super(key: key);\n+\n+  final Performance performance;\n+  final Widget child;\n+  final double childHeight;\n+\n+  bool get _dismissUnderway => performance.direction == AnimationDirection.reverse;\n+\n+  void _handleDragUpdate(double delta) {\n+    if (_dismissUnderway)\n+      return;\n+    performance.progress -= delta / (childHeight ?? delta);\n+  }\n+\n+  void _handleDragEnd(Offset velocity, BuildContext context) {\n+    if (_dismissUnderway)\n+      return;\n+    if (velocity.dy > _kMinFlingVelocity)\n+      performance.fling(velocity: -velocity.dy / childHeight).then((dynamic value) {\n+        Navigator.of(context).pop(value);","path":"packages/flutter/lib/src/material/bottom_sheet.dart","position":32,"original_position":32,"commit_id":"9cb8188a0c6eeb99b9518d72df35e58faa6c5615","original_commit_id":"9cb8188a0c6eeb99b9518d72df35e58faa6c5615","user":{"login":"abarth","id":112007,"avatar_url":"https://avatars.githubusercontent.com/u/112007?v=3","gravatar_id":"","url":"https://api.github.com/users/abarth","html_url":"https://github.com/abarth","followers_url":"https://api.github.com/users/abarth/followers","following_url":"https://api.github.com/users/abarth/following{/other_user}","gists_url":"https://api.github.com/users/abarth/gists{/gist_id}","starred_url":"https://api.github.com/users/abarth/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/abarth/subscriptions","organizations_url":"https://api.github.com/users/abarth/orgs","repos_url":"https://api.github.com/users/abarth/repos","events_url":"https://api.github.com/users/abarth/events{/privacy}","received_events_url":"https://api.github.com/users/abarth/received_events","type":"User","site_admin":false},"body":"Actually, I don't think we need to call pop here.  Because we're using TransitionRoute, the TransitionRoute will be watching this performance and call `pop` for us when we reach the end of the animation.","created_at":"2015-11-09T16:52:14Z","updated_at":"2015-11-09T16:52:14Z","html_url":"https://github.com/flutter/flutter/pull/62#discussion_r44298584","pull_request_url":"https://api.github.com/repos/flutter/flutter/pulls/62","_links":{"self":{"href":"https://api.github.com/repos/flutter/flutter/pulls/comments/44298584"},"html":{"href":"https://github.com/flutter/flutter/pull/62#discussion_r44298584"},"pull_request":{"href":"https://api.github.com/repos/flutter/flutter/pulls/62"}}},"pull_request":{"url":"https://api.github.com/repos/flutter/flutter/pulls/62","id":50145004,"html_url":"https://github.com/flutter/flutter/pull/62","diff_url":"https://github.com/flutter/flutter/pull/62.diff","patch_url":"https://github.com/flutter/flutter/pull/62.patch","issue_url":"https://api.github.com/repos/flutter/flutter/issues/62","number":62,"state":"open","locked":false,"title":"Support drag-to-dismiss in persistent bottom sheets","user":{"login":"HansMuller","id":1377460,"avatar_url":"https://avatars.githubusercontent.com/u/1377460?v=3","gravatar_id":"","url":"https://api.github.com/users/HansMuller","html_url":"https://github.com/HansMuller","followers_url":"https://api.github.com/users/HansMuller/followers","following_url":"https://api.github.com/users/HansMuller/following{/other_user}","gists_url":"https://api.github.com/users/HansMuller/gists{/gist_id}","starred_url":"https://api.github.com/users/HansMuller/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/HansMuller/subscriptions","organizations_url":"https://api.github.com/users/HansMuller/orgs","repos_url":"https://api.github.com/users/HansMuller/repos","events_url":"https://api.github.com/users/HansMuller/events{/privacy}","received_events_url":"https://api.github.com/users/HansMuller/received_events","type":"User","site_admin":false},"body":"Flinging a persistent bottom sheet downwards dismisses it, per the Material spec.\r\n\r\nThe showBottomSheet() function now returns a Future, like showModalBottomSheet() does, so that you can discover when it's been dismissed - with navigator.pop() - and with what value.\r\n\r\nFactored the drag gesture handling code into _BottomSheetDragController\r\n\r\nThis CL was https://github.com/flutter/engine/pull/1997","created_at":"2015-11-09T16:37:46Z","updated_at":"2015-11-09T16:52:14Z","closed_at":null,"merged_at":null,"merge_commit_sha":"6d9ed9beed565bf8624f872f5800882c0ab4a03f","assignee":null,"milestone":null,"commits_url":"https://api.github.com/repos/flutter/flutter/pulls/62/commits","review_comments_url":"https://api.github.com/repos/flutter/flutter/pulls/62/comments","review_comment_url":"https://api.github.com/repos/flutter/flutter/pulls/comments{/number}","comments_url":"https://api.github.com/repos/flutter/flutter/issues/62/comments","statuses_url":"https://api.github.com/repos/flutter/flutter/statuses/9cb8188a0c6eeb99b9518d72df35e58faa6c5615","head":{"label":"HansMuller:bottom_sheet_drag","ref":"bottom_sheet_drag","sha":"9cb8188a0c6eeb99b9518d72df35e58faa6c5615","user":{"login":"HansMuller","id":1377460,"avatar_url":"https://avatars.githubusercontent.com/u/1377460?v=3","gravatar_id":"","url":"https://api.github.com/users/HansMuller","html_url":"https://github.com/HansMuller","followers_url":"https://api.github.com/users/HansMuller/followers","following_url":"https://api.github.com/users/HansMuller/following{/other_user}","gists_url":"https://api.github.com/users/HansMuller/gists{/gist_id}","starred_url":"https://api.github.com/users/HansMuller/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/HansMuller/subscriptions","organizations_url":"https://api.github.com/users/HansMuller/orgs","repos_url":"https://api.github.com/users/HansMuller/repos","events_url":"https://api.github.com/users/HansMuller/events{/privacy}","received_events_url":"https://api.github.com/users/HansMuller/received_events","type":"User","site_admin":false},"repo":{"id":45849791,"name":"flutter","full_name":"HansMuller/flutter","owner":{"login":"HansMuller","id":1377460,"avatar_url":"https://avatars.githubusercontent.com/u/1377460?v=3","gravatar_id":"","url":"https://api.github.com/users/HansMuller","html_url":"https://github.com/HansMuller","followers_url":"https://api.github.com/users/HansMuller/followers","following_url":"https://api.github.com/users/HansMuller/following{/other_user}","gists_url":"https://api.github.com/users/HansMuller/gists{/gist_id}","starred_url":"https://api.github.com/users/HansMuller/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/HansMuller/subscriptions","organizations_url":"https://api.github.com/users/HansMuller/orgs","repos_url":"https://api.github.com/users/HansMuller/repos","events_url":"https://api.github.com/users/HansMuller/events{/privacy}","received_events_url":"https://api.github.com/users/HansMuller/received_events","type":"User","site_admin":false},"private":false,"html_url":"https://github.com/HansMuller/flutter","description":"The Flutter framework","fork":true,"url":"https://api.github.com/repos/HansMuller/flutter","forks_url":"https://api.github.com/repos/HansMuller/flutter/forks","keys_url":"https://api.github.com/repos/HansMuller/flutter/keys{/key_id}","collaborators_url":"https://api.github.com/repos/HansMuller/flutter/collaborators{/collaborator}","teams_url":"https://api.github.com/repos/HansMuller/flutter/teams","hooks_url":"https://api.github.com/repos/HansMuller/flutter/hooks","issue_events_url":"https://api.github.com/repos/HansMuller/flutter/issues/events{/number}","events_url":"https://api.github.com/repos/HansMuller/flutter/events","assignees_url":"https://api.github.com/repos/HansMuller/flutter/assignees{/user}","branches_url":"https://api.github.com/repos/HansMuller/flutter/branches{/branch}","tags_url":"https://api.github.com/repos/HansMuller/flutter/tags","blobs_url":"https://api.github.com/repos/HansMuller/flutter/git/blobs{/sha}","git_tags_url":"https://api.github.com/repos/HansMuller/flutter/git/tags{/sha}","git_refs_url":"https://api.github.com/repos/HansMuller/flutter/git/refs{/sha}","trees_url":"https://api.github.com/repos/HansMuller/flutter/git/trees{/sha}","statuses_url":"https://api.github.com/repos/HansMuller/flutter/statuses/{sha}","languages_url":"https://api.github.com/repos/HansMuller/flutter/languages","stargazers_url":"https://api.github.com/repos/HansMuller/flutter/stargazers","contributors_url":"https://api.github.com/repos/HansMuller/flutter/contributors","subscribers_url":"https://api.github.com/repos/HansMuller/flutter/subscribers","subscription_url":"https://api.github.com/repos/HansMuller/flutter/subscription","commits_url":"https://api.github.com/repos/HansMuller/flutter/commits{/sha}","git_commits_url":"https://api.github.com/repos/HansMuller/flutter/git/commits{/sha}","comments_url":"https://api.github.com/repos/HansMuller/flutter/comments{/number}","issue_comment_url":"https://api.github.com/repos/HansMuller/flutter/issues/comments{/number}","contents_url":"https://api.github.com/repos/HansMuller/flutter/contents/{+path}","compare_url":"https://api.github.com/repos/HansMuller/flutter/compare/{base}...{head}","merges_url":"https://api.github.com/repos/HansMuller/flutter/merges","archive_url":"https://api.github.com/repos/HansMuller/flutter/{archive_format}{/ref}","downloads_url":"https://api.github.com/repos/HansMuller/flutter/downloads","issues_url":"https://api.github.com/repos/HansMuller/flutter/issues{/number}","pulls_url":"https://api.github.com/repos/HansMuller/flutter/pulls{/number}","milestones_url":"https://api.github.com/repos/HansMuller/flutter/milestones{/number}","notifications_url":"https://api.github.com/repos/HansMuller/flutter/notifications{?since,all,participating}","labels_url":"https://api.github.com/repos/HansMuller/flutter/labels{/name}","releases_url":"https://api.github.com/repos/HansMuller/flutter/releases{/id}","created_at":"2015-11-09T16:11:46Z","updated_at":"2015-11-09T16:11:50Z","pushed_at":"2015-11-09T16:36:41Z","git_url":"git://github.com/HansMuller/flutter.git","ssh_url":"git@github.com:HansMuller/flutter.git","clone_url":"https://github.com/HansMuller/flutter.git","svn_url":"https://github.com/HansMuller/flutter","homepage":"http://flutter.io","size":91621,"stargazers_count":0,"watchers_count":0,"language":"Dart","has_issues":false,"has_downloads":true,"has_wiki":true,"has_pages":false,"forks_count":0,"mirror_url":null,"open_issues_count":0,"forks":0,"open_issues":0,"watchers":0,"default_branch":"master"}},"base":{"label":"flutter:master","ref":"master","sha":"1cadf1256d5b713c88d257ac5215dbf2f8597c89","user":{"login":"flutter","id":14101776,"avatar_url":"https://avatars.githubusercontent.com/u/14101776?v=3","gravatar_id":"","url":"https://api.github.com/users/flutter","html_url":"https://github.com/flutter","followers_url":"https://api.github.com/users/flutter/followers","following_url":"https://api.github.com/users/flutter/following{/other_user}","gists_url":"https://api.github.com/users/flutter/gists{/gist_id}","starred_url":"https://api.github.com/users/flutter/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/flutter/subscriptions","organizations_url":"https://api.github.com/users/flutter/orgs","repos_url":"https://api.github.com/users/flutter/repos","events_url":"https://api.github.com/users/flutter/events{/privacy}","received_events_url":"https://api.github.com/users/flutter/received_events","type":"Organization","site_admin":false},"repo":{"id":31792824,"name":"flutter","full_name":"flutter/flutter","owner":{"login":"flutter","id":14101776,"avatar_url":"https://avatars.githubusercontent.com/u/14101776?v=3","gravatar_id":"","url":"https://api.github.com/users/flutter","html_url":"https://github.com/flutter","followers_url":"https://api.github.com/users/flutter/followers","following_url":"https://api.github.com/users/flutter/following{/other_user}","gists_url":"https://api.github.com/users/flutter/gists{/gist_id}","starred_url":"https://api.github.com/users/flutter/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/flutter/subscriptions","organizations_url":"https://api.github.com/users/flutter/orgs","repos_url":"https://api.github.com/users/flutter/repos","events_url":"https://api.github.com/users/flutter/events{/privacy}","received_events_url":"https://api.github.com/users/flutter/received_events","type":"Organization","site_admin":false},"private":false,"html_url":"https://github.com/flutter/flutter","description":"The Flutter framework","fork":false,"url":"https://api.github.com/repos/flutter/flutter","forks_url":"https://api.github.com/repos/flutter/flutter/forks","keys_url":"https://api.github.com/repos/flutter/flutter/keys{/key_id}","collaborators_url":"https://api.github.com/repos/flutter/flutter/collaborators{/collaborator}","teams_url":"https://api.github.com/repos/flutter/flutter/teams","hooks_url":"https://api.github.com/repos/flutter/flutter/hooks","issue_events_url":"https://api.github.com/repos/flutter/flutter/issues/events{/number}","events_url":"https://api.github.com/repos/flutter/flutter/events","assignees_url":"https://api.github.com/repos/flutter/flutter/assignees{/user}","branches_url":"https://api.github.com/repos/flutter/flutter/branches{/branch}","tags_url":"https://api.github.com/repos/flutter/flutter/tags","blobs_url":"https://api.github.com/repos/flutter/flutter/git/blobs{/sha}","git_tags_url":"https://api.github.com/repos/flutter/flutter/git/tags{/sha}","git_refs_url":"https://api.github.com/repos/flutter/flutter/git/refs{/sha}","trees_url":"https://api.github.com/repos/flutter/flutter/git/trees{/sha}","statuses_url":"https://api.github.com/repos/flutter/flutter/statuses/{sha}","languages_url":"https://api.github.com/repos/flutter/flutter/languages","stargazers_url":"https://api.github.com/repos/flutter/flutter/stargazers","contributors_url":"https://api.github.com/repos/flutter/flutter/contributors","subscribers_url":"https://api.github.com/repos/flutter/flutter/subscribers","subscription_url":"https://api.github.com/repos/flutter/flutter/subscription","commits_url":"https://api.github.com/repos/flutter/flutter/commits{/sha}","git_commits_url":"https://api.github.com/repos/flutter/flutter/git/commits{/sha}","comments_url":"https://api.github.com/repos/flutter/flutter/comments{/number}","issue_comment_url":"https://api.github.com/repos/flutter/flutter/issues/comments{/number}","contents_url":"https://api.github.com/repos/flutter/flutter/contents/{+path}","compare_url":"https://api.github.com/repos/flutter/flutter/compare/{base}...{head}","merges_url":"https://api.github.com/repos/flutter/flutter/merges","archive_url":"https://api.github.com/repos/flutter/flutter/{archive_format}{/ref}","downloads_url":"https://api.github.com/repos/flutter/flutter/downloads","issues_url":"https://api.github.com/repos/flutter/flutter/issues{/number}","pulls_url":"https://api.github.com/repos/flutter/flutter/pulls{/number}","milestones_url":"https://api.github.com/repos/flutter/flutter/milestones{/number}","notifications_url":"https://api.github.com/repos/flutter/flutter/notifications{?since,all,participating}","labels_url":"https://api.github.com/repos/flutter/flutter/labels{/name}","releases_url":"https://api.github.com/repos/flutter/flutter/releases{/id}","created_at":"2015-03-06T22:54:58Z","updated_at":"2015-11-09T13:08:14Z","pushed_at":"2015-11-09T16:37:46Z","git_url":"git://github.com/flutter/flutter.git","ssh_url":"git@github.com:flutter/flutter.git","clone_url":"https://github.com/flutter/flutter.git","svn_url":"https://github.com/flutter/flutter","homepage":"http://flutter.io","size":91621,"stargazers_count":2129,"watchers_count":2129,"language":"Dart","has_issues":true,"has_downloads":true,"has_wiki":true,"has_pages":false,"forks_count":191,"mirror_url":null,"open_issues_count":20,"forks":191,"open_issues":20,"watchers":2129,"default_branch":"master"}},"_links":{"self":{"href":"https://api.github.com/repos/flutter/flutter/pulls/62"},"html":{"href":"https://github.com/flutter/flutter/pull/62"},"issue":{"href":"https://api.github.com/repos/flutter/flutter/issues/62"},"comments":{"href":"https://api.github.com/repos/flutter/flutter/issues/62/comments"},"review_comments":{"href":"https://api.github.com/repos/flutter/flutter/pulls/62/comments"},"review_comment":{"href":"https://api.github.com/repos/flutter/flutter/pulls/comments{/number}"},"commits":{"href":"https://api.github.com/repos/flutter/flutter/pulls/62/commits"},"statuses":{"href":"https://api.github.com/repos/flutter/flutter/statuses/9cb8188a0c6eeb99b9518d72df35e58faa6c5615"}}}}