build method
- BuildContext context
override
Describes the part of the user interface represented by this widget.
The framework calls this method when this widget is inserted into the tree in a given BuildContext and when the dependencies of this widget change (e.g., an InheritedWidget referenced by this widget changes). This method can potentially be called in every frame and should not have any side effects beyond building a widget.
The framework replaces the subtree below this widget with the widget returned by this method, either by updating the existing subtree or by removing the subtree and inflating a new subtree, depending on whether the widget returned by this method can update the root of the existing subtree, as determined by calling Widget.canUpdate.
Typically implementations return a newly created constellation of widgets that are configured with information from this widget's constructor and from the given BuildContext.
The given BuildContext contains information about the location in the tree at which this widget is being built. For example, the context provides the set of inherited widgets for this location in the tree. A given widget might be built with multiple different BuildContext arguments over time if the widget is moved around the tree or if the widget is inserted into the tree in multiple places at once.
The implementation of this method must only depend on:
- the fields of the widget, which themselves must not change over time, and
- any ambient state obtained from the
contextusing BuildContext.dependOnInheritedWidgetOfExactType.
If a widget's build method is to depend on anything else, use a StatefulWidget instead.
See also:
- StatelessWidget, which contains the discussion on performance considerations.
Implementation
@override
Widget build(BuildContext context) {
final style = Theme.of(context).style;
return GetBuilder(
key: const Key('AccountsView'),
init: AccountsController(Get.find(), Get.find()),
builder: (AccountsController c) {
return Obx(() {
final Widget header;
final List<Widget> children;
final List<Widget> bottom = [];
switch (c.stage.value) {
case AccountsViewStage.signInWithPassword:
header = ModalPopupHeader(
text: 'label_sign_in_with_password'.l10n,
onBack: () => c.stage.value = AccountsViewStage.signIn,
);
children = [
const SizedBox(height: 12),
ReactiveTextField(
key: const Key('UsernameField'),
state: c.login,
label: 'label_sign_in_input'.l10n,
),
const SizedBox(height: 16),
ReactiveTextField(
key: const ValueKey('PasswordField'),
state: c.password,
label: 'label_password'.l10n,
obscure: c.obscurePassword.value,
onSuffixPressed: c.obscurePassword.toggle,
treatErrorAsStatus: false,
trailing: SvgIcon(
c.obscurePassword.value
? SvgIcons.visibleOff
: SvgIcons.visibleOn,
),
),
const SizedBox(height: 25),
Obx(() {
final bool enabled =
!c.login.isEmpty.value &&
!c.password.isEmpty.value &&
c.signInTimeout.value == 0 &&
!c.password.status.value.isLoading;
return PrimaryButton(
key: const Key('LoginButton'),
title:
c.signInTimeout.value == 0
? 'btn_sign_in'.l10n
: 'label_wait_seconds'.l10nfmt({
'for': c.signInTimeout.value,
}),
onPressed: enabled ? c.password.submit : null,
);
}),
const SizedBox(height: 16),
];
break;
case AccountsViewStage.signIn:
header = ModalPopupHeader(
text: 'label_sign_in'.l10n,
onBack: () => c.stage.value = AccountsViewStage.add,
);
children = [
SignButton(
key: const Key('PasswordButton'),
title: 'btn_password'.l10n,
onPressed:
() =>
c.stage.value = AccountsViewStage.signInWithPassword,
icon: const SvgIcon(SvgIcons.password),
padding: const EdgeInsets.only(left: 1),
),
const SizedBox(height: 25 / 2),
const SizedBox(height: 16),
];
break;
case AccountsViewStage.signUpWithEmailCode:
header = ModalPopupHeader(
text: 'label_sign_up'.l10n,
onBack: () => c.stage.value = AccountsViewStage.add,
);
children = [
Text.rich(
'label_sign_up_code_email_sent'
.l10nfmt({'text': c.email.text})
.parseLinks([], style.fonts.medium.regular.primary),
style: style.fonts.medium.regular.onBackground,
),
const SizedBox(height: 16),
Align(
alignment: Alignment.centerLeft,
child: Obx(() {
return Text(
c.resendEmailTimeout.value == 0
? 'label_did_not_receive_code'.l10n
: 'label_code_sent_again'.l10n,
style: style.fonts.medium.regular.onBackground,
);
}),
),
Align(
alignment: Alignment.centerLeft,
child: Obx(() {
final bool enabled = c.resendEmailTimeout.value == 0;
return WidgetButton(
onPressed: enabled ? c.resendEmail : null,
child: Text(
enabled
? 'btn_resend_code'.l10n
: 'label_wait_seconds'.l10nfmt({
'for': c.resendEmailTimeout.value,
}),
style:
enabled
? style.fonts.medium.regular.primary
: style.fonts.medium.regular.onBackground,
),
);
}),
),
const SizedBox(height: 25),
ReactiveTextField(
key: const Key('EmailCodeField'),
state: c.emailCode,
label: 'label_confirmation_code'.l10n,
type: TextInputType.number,
),
const SizedBox(height: 25),
Obx(() {
final bool enabled =
!c.emailCode.isEmpty.value &&
c.codeTimeout.value == 0 &&
!c.emailCode.status.value.isLoading;
return PrimaryButton(
key: const Key('Proceed'),
title:
c.codeTimeout.value == 0
? 'btn_send'.l10n
: 'label_wait_seconds'.l10nfmt({
'for': c.codeTimeout.value,
}),
onPressed: enabled ? c.emailCode.submit : null,
);
}),
const SizedBox(height: 16),
];
break;
case AccountsViewStage.signUpWithEmail:
header = ModalPopupHeader(
text: 'label_sign_up'.l10n,
onBack: () {
c.stage.value = AccountsViewStage.signUp;
c.email.unsubmit();
},
);
children = [
ReactiveTextField(
state: c.email,
label: 'label_email'.l10n,
hint: 'example@domain.com',
style: style.fonts.normal.regular.onBackground,
treatErrorAsStatus: false,
),
const SizedBox(height: 25),
Center(
child: Obx(() {
final bool enabled = !c.email.isEmpty.value;
return OutlinedRoundedButton(
onPressed: enabled ? c.email.submit : null,
color: style.colors.primary,
maxWidth: double.infinity,
child: Text(
'btn_proceed'.l10n,
style:
enabled
? style.fonts.medium.regular.onPrimary
: style.fonts.medium.regular.onBackground,
),
);
}),
),
const SizedBox(height: 16),
];
break;
case AccountsViewStage.signUp:
header = ModalPopupHeader(
text: 'label_sign_up'.l10n,
onBack: () => c.stage.value = AccountsViewStage.add,
);
children = [
SignButton(
title: 'btn_email'.l10n,
icon: const SvgIcon(SvgIcons.email),
onPressed:
() => c.stage.value = AccountsViewStage.signUpWithEmail,
),
const SizedBox(height: 25 / 2),
const SizedBox(height: 16),
];
break;
case AccountsViewStage.add:
header = ModalPopupHeader(
text: 'label_add_account'.l10n,
onBack: () => c.stage.value = AccountsViewStage.accounts,
);
children = [
Center(
child: Obx(() {
final bool enabled = c.authStatus.value.isSuccess;
return OutlinedRoundedButton(
key: const Key('StartButton'),
maxWidth: 290,
height: 46,
leading: Transform.translate(
offset: const Offset(4, 0),
child: const SvgIcon(SvgIcons.guest),
),
onPressed:
enabled
? () {
Navigator.of(context).pop();
c.register();
}
: () {},
child: Text('btn_guest'.l10n),
);
}),
),
const SizedBox(height: 15),
Center(
child: OutlinedRoundedButton(
key: const Key('SignUpButton'),
maxWidth: 290,
height: 46,
leading: Transform.translate(
offset: const Offset(3, 0),
child: const SvgIcon(SvgIcons.register),
),
onPressed: () => c.stage.value = AccountsViewStage.signUp,
child: Text('btn_sign_up'.l10n),
),
),
const SizedBox(height: 15),
Center(
child: OutlinedRoundedButton(
key: const Key('SignInButton'),
maxWidth: 290,
height: 46,
leading: Transform.translate(
offset: const Offset(4, 0),
child: const SvgIcon(SvgIcons.enter),
),
onPressed: () => c.stage.value = AccountsViewStage.signIn,
child: Text('btn_sign_in'.l10n),
),
),
const SizedBox(height: 16),
];
break;
case AccountsViewStage.accounts:
header = ModalPopupHeader(text: 'label_accounts'.l10n);
children = [];
for (final e in c.accounts) {
children.add(
Obx(() {
final MyUser myUser = e.value;
final bool expired = !c.sessions.containsKey(myUser.id);
final bool active = c.me == myUser.id;
return ContactTile(
key: Key('Account_${e.value.id}'),
myUser: myUser,
// TODO: Prompt to sign in to the non-[authorized].
onTap:
active
? null
: () async {
if (expired) {
await LoginView.show(
context,
initial: LoginViewStage.signIn,
myUser: myUser,
);
} else {
Navigator.of(context).pop();
await c.switchTo(myUser.id);
}
},
// TODO: Remove, when [MyUser]s will receive their
// updates in real-time.
avatarBuilder:
(_) => AvatarWidget.fromMyUser(
myUser,
radius: AvatarRadius.large,
badge: active,
),
trailing: [
AnimatedButton(
key: const Key('RemoveAccount'),
decorator:
(child) => Padding(
padding: const EdgeInsets.fromLTRB(8, 8, 6, 8),
child: child,
),
onPressed: () async {
final bool? result = await MessagePopup.alert(
'btn_logout'.l10n,
description: [
TextSpan(
style: style.fonts.medium.regular.secondary,
children: [
TextSpan(
text:
'alert_are_you_sure_want_to_log_out1'
.l10n,
),
TextSpan(
style:
style
.fonts
.medium
.regular
.onBackground,
text: '${myUser.name ?? myUser.num}',
),
TextSpan(
text:
'alert_are_you_sure_want_to_log_out2'
.l10n,
),
if (!myUser.hasPassword) ...[
const TextSpan(text: '\n\n'),
TextSpan(
text: 'label_password_not_set'.l10n,
),
],
if (myUser.emails.confirmed.isEmpty &&
myUser.phones.confirmed.isEmpty) ...[
const TextSpan(text: '\n\n'),
TextSpan(
text:
'label_email_or_phone_not_set'.l10n,
),
],
],
),
],
);
if (result == true) {
await c.deleteAccount(myUser.id);
}
},
child:
active
? const SvgIcon(SvgIcons.logoutWhite)
: const SvgIcon(SvgIcons.logout),
),
],
selected: active,
subtitle: [
const SizedBox(height: 5),
if (active)
Text(
'label_active_account'.l10n,
style: style.fonts.small.regular.onPrimary,
)
else if (expired)
Text(
'label_sign_in_required'.l10n,
style: style.fonts.small.regular.danger,
),
// TODO: Uncomment, when [MyUser]s will receive their
// updates in real-time.
// else
// Text(
// myUser.getStatus() ?? '',
// style: style.fonts.small.regular.secondary,
// )
],
);
}),
);
}
children.add(const SizedBox(height: 10));
bottom.addAll([
Padding(
padding: ModalPopup.padding(context),
child: PrimaryButton(
key: const Key('AddAccountButton'),
onPressed: () => c.stage.value = AccountsViewStage.add,
title: 'btn_add_account'.l10n,
),
),
const SizedBox(height: 16),
]);
break;
}
return AnimatedSizeAndFade(
fadeDuration: const Duration(milliseconds: 250),
sizeDuration: const Duration(milliseconds: 250),
child: Column(
key: Key('${c.stage.value.name.capitalizeFirst}Stage'),
mainAxisSize: MainAxisSize.min,
children: [
header,
const SizedBox(height: 13),
Flexible(
child: ListView(
padding: ModalPopup.padding(context),
shrinkWrap: true,
children: children,
),
),
...bottom,
],
),
);
});
},
);
}