How to listen to Drawer open/close animation in Flutter
Being new to Flutter, I'm doing a learning exercise by re-creating my existing Android app. However I'm having trouble to produce a 'spinning, growing home icon', which should be animated in sync with the drawer open/close animation.
The desired drawer/home-icon behaviour looks like this:
I made this in Android by implementing
DrawerListener.onDrawerSlide(View drawerView, float slideOffset)
My naive approach to do this in Flutter, is to use a ScaleTransition and a RotationTransition that listen to the same Animation that opens/closes the Drawer.
I can see that ScaffoldState has a DrawerControllerState, but it is private.
final GlobalKey<DrawerControllerState> _drawerKey = new GlobalKey<DrawerControllerState>();
And even if I could somehow access the DrawerControllerState (which I don't know how), I then couldn't access _animationChanged() and _controller because both are private members of DrawerControllerState.
I feel that I'm coming at this in the wrong way, and that there is an better approach that's more natural to Flutter, that I'm unable to see.
Please can anyone describe the Flutter way of implementing this?
dart
flutter flutter-animation asked Nov 15 '18 at 1:51
planktronicplanktronic
213
add a comment |
Being new to Flutter, I'm doing a learning exercise by re-creating my existing Android app. However I'm having trouble to produce a 'spinning, growing home icon', which should be animated in sync with the drawer open/close animation.
The desired drawer/home-icon behaviour looks like this:
I made this in Android by implementing
DrawerListener.onDrawerSlide(View drawerView, float slideOffset)
My naive approach to do this in Flutter, is to use a ScaleTransition and a RotationTransition that listen to the same Animation that opens/closes the Drawer.
I can see that ScaffoldState has a DrawerControllerState, but it is private.
final GlobalKey<DrawerControllerState> _drawerKey = new GlobalKey<DrawerControllerState>();
And even if I could somehow access the DrawerControllerState (which I don't know how), I then couldn't access _animationChanged() and _controller because both are private members of DrawerControllerState.
I feel that I'm coming at this in the wrong way, and that there is an better approach that's more natural to Flutter, that I'm unable to see.
Please can anyone describe the Flutter way of implementing this?
dart
flutter flutter-animation asked Nov 15 '18 at 1:51
planktronicplanktronic
213
github.com/flutter/flutter/issues/14510
– Günter Zöchbauer
Nov 15 '18 at 6:50
add a comment |
Being new to Flutter, I'm doing a learning exercise by re-creating my existing Android app. However I'm having trouble to produce a 'spinning, growing home icon', which should be animated in sync with the drawer open/close animation.
The desired drawer/home-icon behaviour looks like this:
I made this in Android by implementing
DrawerListener.onDrawerSlide(View drawerView, float slideOffset)
My naive approach to do this in Flutter, is to use a ScaleTransition and a RotationTransition that listen to the same Animation that opens/closes the Drawer.
I can see that ScaffoldState has a DrawerControllerState, but it is private.
final GlobalKey<DrawerControllerState> _drawerKey = new GlobalKey<DrawerControllerState>();
And even if I could somehow access the DrawerControllerState (which I don't know how), I then couldn't access _animationChanged() and _controller because both are private members of DrawerControllerState.
I feel that I'm coming at this in the wrong way, and that there is an better approach that's more natural to Flutter, that I'm unable to see.
Please can anyone describe the Flutter way of implementing this?
dart
flutter flutter-animation asked Nov 15 '18 at 1:51
planktronicplanktronic
213
Being new to Flutter, I'm doing a learning exercise by re-creating my existing Android app. However I'm having trouble to produce a 'spinning, growing home icon', which should be animated in sync with the drawer open/close animation.
The desired drawer/home-icon behaviour looks like this:
I made this in Android by implementing
DrawerListener.onDrawerSlide(View drawerView, float slideOffset)
My naive approach to do this in Flutter, is to use a ScaleTransition and a RotationTransition that listen to the same Animation that opens/closes the Drawer.
I can see that ScaffoldState has a DrawerControllerState, but it is private.
final GlobalKey<DrawerControllerState> _drawerKey = new GlobalKey<DrawerControllerState>();
And even if I could somehow access the DrawerControllerState (which I don't know how), I then couldn't access _animationChanged() and _controller because both are private members of DrawerControllerState.
I feel that I'm coming at this in the wrong way, and that there is an better approach that's more natural to Flutter, that I'm unable to see.
Please can anyone describe the Flutter way of implementing this?
dart
flutter flutter-animation dart
flutter flutter-animation asked Nov 15 '18 at 1:51
planktronicplanktronic
213
asked Nov 15 '18 at 1:51
planktronicplanktronic
213
asked Nov 15 '18 at 1:51
planktronicplanktronic
213
asked Nov 15 '18 at 1:51
planktronicplanktronic
213
asked Nov 15 '18 at 1:51
planktronicplanktronic
213
213
github.com/flutter/flutter/issues/14510
– Günter Zöchbauer
Nov 15 '18 at 6:50
add a comment |
github.com/flutter/flutter/issues/14510
– Günter Zöchbauer
Nov 15 '18 at 6:50
github.com/flutter/flutter/issues/14510
– Günter Zöchbauer
Nov 15 '18 at 6:50
github.com/flutter/flutter/issues/14510
– Günter Zöchbauer
Nov 15 '18 at 6:50
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function ()
StackExchange.using("externalEditor", function ()
StackExchange.using("snippets", function ()
StackExchange.snippets.init();
);
);
, "code-snippets");
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "1"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53311323%2fhow-to-listen-to-drawer-open-close-animation-in-flutter%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53311323%2fhow-to-listen-to-drawer-open-close-animation-in-flutter%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
github.com/flutter/flutter/issues/14510
– Günter Zöchbauer
Nov 15 '18 at 6:50