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Code Issues Releases Wiki Activity

feat: disable refresh on tab switch

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This commit is contained in:
Rongjian Zhang 2019-09-24 20:35:37 +08:00
parent d5363f613e
commit 09c1ded405
1 changed files with 49 additions and 12 deletions
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61
lib/scaffolds/tab.dart
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@ -9,15 +9,15 @@ class TabScaffold<T> extends StatefulWidget {
final Widget title;
final Widget Function(T payload) bodyBuilder;
final Future<T> Function(int activeTab) onRefresh;
final Widget Function(T payload) trailingBuilder;
final List<String> tabs;
final Widget Function(T payload) trailingBuilder;
TabScaffold({
@required this.title,
@required this.bodyBuilder,
@required this.onRefresh,
@required this.tabs,
this.trailingBuilder,
this.tabs,
});
@override
@ -26,10 +26,41 @@ class TabScaffold<T> extends StatefulWidget {
class _TabScaffoldState<T> extends State<TabScaffold<T>> {
bool _loading;
T _payload;
T _payload0;
T _payload1;
T _payload2;
String _error = '';
int _activeTab = 0;
T _getPayload(int selected) {
switch (selected) {
case 0:
return _payload0;
case 1:
return _payload1;
case 2:
return _payload2;
default:
throw '';
}
}
T get _payload => _getPayload(_activeTab);
set _payload(T v) {
switch (_activeTab) {
case 0:
_payload0 = v;
break;
case 1:
_payload1 = v;
break;
case 2:
_payload2 = v;
break;
}
}
@override
void initState() {
super.initState();
@ -46,16 +77,13 @@ class _TabScaffoldState<T> extends State<TabScaffold<T>> {
}
}
Future<void> _refresh([int activeTab]) async {
Future<void> _refresh() async {
try {
setState(() {
_error = '';
_loading = true;
if (activeTab != null) {
_activeTab = activeTab;
}
});
_payload = await widget.onRefresh(activeTab);
_payload = await widget.onRefresh(_activeTab);
} catch (err) {
_error = err.toString();
throw err;
@ -68,6 +96,15 @@ class _TabScaffoldState<T> extends State<TabScaffold<T>> {
}
}
Future<void> _switch(int selected)async {
setState(() {
_activeTab = selected;
});
if (_getPayload(selected) == null) {
await _refresh();
}
}
Widget _buildTrailing() {
if (_payload == null || widget.trailingBuilder == null) return null;
@ -87,14 +124,14 @@ class _TabScaffoldState<T> extends State<TabScaffold<T>> {
return CupertinoPageScaffold(
navigationBar: CupertinoNavigationBar(
middle: DefaultTextStyle(
style: TextStyle(),
style: TextStyle(fontSize: 16),
child: CupertinoSegmentedControl(
groupValue: _activeTab,
onValueChanged: _refresh,
onValueChanged: _switch,
children: widget.tabs.asMap().map((key, text) => MapEntry(
key,
Padding(
padding: const EdgeInsets.symmetric(horizontal: 4),
padding: const EdgeInsets.symmetric(horizontal: 8),
child: Text(text),
))),
),
@ -118,7 +155,7 @@ class _TabScaffoldState<T> extends State<TabScaffold<T>> {
title: widget.title,
actions: _buildActions(),
bottom: TabBar(
onTap: _refresh,
onTap: _switch,
tabs: widget.tabs
.map((text) => Tab(text: text.toUpperCase()))
.toList(),