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Fixing list tile size in the presence of a large subtitle (#17580)

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Take into account the subtitle height when adjusting the height of the widget. Added a test.
This commit is contained in:
Greg Spencer 2018-05-14 15:51:12 -07:00 committed by GitHub
parent 52246c048d
commit a25bbc7bfc
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 45 additions and 30 deletions
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35
packages/flutter/lib/src/material/list_tile.dart
View file

@ -443,11 +443,11 @@ class ListTile extends StatelessWidget {
);
}
const EdgeInsets _kDefaultContentPadding = const EdgeInsets.symmetric(horizontal: 16.0);
const EdgeInsets _defaultContentPadding = const EdgeInsets.symmetric(horizontal: 16.0);
final TextDirection textDirection = Directionality.of(context);
final EdgeInsets resolvedContentPadding = contentPadding?.resolve(textDirection)
?? tileTheme?.contentPadding?.resolve(textDirection)
?? _kDefaultContentPadding;
?? _defaultContentPadding;
return new InkWell(
onTap: enabled ? onTap : null,
@ -529,8 +529,11 @@ class _RenderListTile extends RenderBox {
_isThreeLine = isThreeLine,
_textDirection = textDirection;
static const double _kMinLeadingWidth = 40.0;
static const double _kTitleGap = 16.0; // between the titles and the leading/trailing widgets
static const double _minLeadingWidth = 40.0;
// The horizontal gap between the titles and the leading/trailing widgets
static const double _horizontalTitleGap = 16.0;
// The minimum padding on the top and bottom of the title and subtitle widgets.
static const double _minVerticalPadding = 4.0;
final Map<_ListTileSlot, RenderBox> slotToChild = <_ListTileSlot, RenderBox>{};
final Map<RenderBox, _ListTileSlot> childToSlot = <RenderBox, _ListTileSlot>{};
@ -664,7 +667,7 @@ class _RenderListTile extends RenderBox {
@override
double computeMinIntrinsicWidth(double height) {
final double leadingWidth = leading != null
? math.max(leading.getMinIntrinsicWidth(height), _kMinLeadingWidth) + _kTitleGap
? math.max(leading.getMinIntrinsicWidth(height), _minLeadingWidth) + _horizontalTitleGap
: 0.0;
return leadingWidth
+ math.max(_minWidth(title, height), _minWidth(subtitle, height))
@ -674,7 +677,7 @@ class _RenderListTile extends RenderBox {
@override
double computeMaxIntrinsicWidth(double height) {
final double leadingWidth = leading != null
? math.max(leading.getMaxIntrinsicWidth(height), _kMinLeadingWidth) + _kTitleGap
? math.max(leading.getMaxIntrinsicWidth(height), _minLeadingWidth) + _horizontalTitleGap
: 0.0;
return leadingWidth
+ math.max(_maxWidth(title, height), _maxWidth(subtitle, height))
@ -746,10 +749,10 @@ class _RenderListTile extends RenderBox {
final Size trailingSize = _layoutBox(trailing, looseConstraints);
final double titleStart = hasLeading
? math.max(_kMinLeadingWidth, leadingSize.width) + _kTitleGap
? math.max(_minLeadingWidth, leadingSize.width) + _horizontalTitleGap
: 0.0;
final BoxConstraints textConstraints = looseConstraints.tighten(
width: tileWidth - titleStart - (hasTrailing ? trailingSize.width + _kTitleGap : 0.0),
width: tileWidth - titleStart - (hasTrailing ? trailingSize.width + _horizontalTitleGap : 0.0),
);
final Size titleSize = _layoutBox(title, textConstraints);
final Size subtitleSize = _layoutBox(subtitle, textConstraints);
@ -770,7 +773,7 @@ class _RenderListTile extends RenderBox {
double titleY;
double subtitleY;
if (!hasSubtitle) {
tileHeight = math.max(_defaultTileHeight, titleSize.height);
tileHeight = math.max(_defaultTileHeight, titleSize.height + 2.0 * _minVerticalPadding);
titleY = (tileHeight - titleSize.height) / 2.0;
} else {
titleY = titleBaseline - _boxBaseline(title);
@ -787,11 +790,13 @@ class _RenderListTile extends RenderBox {
}
// If the title or subtitle overflow tileHeight then punt: title
// and subtitle are arranged in a column, tileHeight = column height.
if (titleY < 0.0 || subtitleY > tileHeight) {
tileHeight = titleSize.height + subtitleSize.height;
titleY = 0.0;
subtitleY = titleSize.height;
// and subtitle are arranged in a column, tileHeight = column height plus
// _minVerticalPadding on top and bottom.
if (titleY < _minVerticalPadding ||
(subtitleY + subtitleSize.height + _minVerticalPadding) > tileHeight) {
tileHeight = titleSize.height + subtitleSize.height + 2.0 * _minVerticalPadding;
titleY = _minVerticalPadding;
subtitleY = titleSize.height + _minVerticalPadding;
}
}
@ -802,7 +807,7 @@ class _RenderListTile extends RenderBox {
case TextDirection.rtl: {
if (hasLeading)
_positionBox(leading, new Offset(tileWidth - leadingSize.width, leadingY));
final double titleX = hasTrailing ? trailingSize.width + _kTitleGap : 0.0;
final double titleX = hasTrailing ? trailingSize.width + _horizontalTitleGap : 0.0;
_positionBox(title, new Offset(titleX, titleY));
if (hasSubtitle)
_positionBox(subtitle, new Offset(titleX, subtitleY));

40
packages/flutter/test/material/list_tile_test.dart
View file

@ -56,8 +56,9 @@ void main() {
const double leftPadding = 10.0;
const double rightPadding = 20.0;
Widget buildFrame({ bool dense: false, bool isTwoLine: false, bool isThreeLine: false, double textScaleFactor: 1.0 }) {
Widget buildFrame({ bool dense: false, bool isTwoLine: false, bool isThreeLine: false, double textScaleFactor: 1.0, double subtitleScaleFactor }) {
hasSubtitle = isTwoLine || isThreeLine;
subtitleScaleFactor ??= textScaleFactor;
return new MaterialApp(
home: new MediaQuery(
data: new MediaQueryData(
@ -69,7 +70,7 @@ void main() {
child: new ListTile(
leading: new Container(key: leadingKey, width: 24.0, height: 24.0),
title: const Text('title'),
subtitle: hasSubtitle ? const Text('subtitle') : null,
subtitle: hasSubtitle ? new Text('subtitle', textScaleFactor: subtitleScaleFactor) : null,
trailing: new Container(key: trailingKey, width: 24.0, height: 24.0),
dense: dense,
isThreeLine: isThreeLine,
@ -91,6 +92,7 @@ void main() {
double left(String text) => tester.getTopLeft(find.text(text)).dx;
double top(String text) => tester.getTopLeft(find.text(text)).dy;
double bottom(String text) => tester.getBottomLeft(find.text(text)).dy;
double height(String text) => tester.getRect(find.text(text)).height;
double leftKey(Key key) => tester.getTopLeft(find.byKey(key)).dx;
double rightKey(Key key) => tester.getTopRight(find.byKey(key)).dx;
@ -98,7 +100,7 @@ void main() {
double heightKey(Key key) => tester.getSize(find.byKey(key)).height;
// ListTiles are contained by a SafeArea defined like this:
// SafeArea(top: false, bottom: false, minimim: contentPadding)
// SafeArea(top: false, bottom: false, minimum: contentPadding)
// The default contentPadding is 16.0 on the left and right.
void testHorizontalGeometry() {
expect(leftKey(leadingKey), math.max(16.0, leftPadding));
@ -111,9 +113,15 @@ void main() {
}
void testVerticalGeometry(double expectedHeight) {
expect(tester.getSize(find.byType(ListTile)), new Size(800.0, expectedHeight));
if (hasSubtitle)
final Rect tileRect = tester.getRect(find.byType(ListTile));
expect(tileRect.size, new Size(800.0, expectedHeight));
expect(top('title'), greaterThanOrEqualTo(tileRect.top));
if (hasSubtitle) {
expect(top('subtitle'), greaterThanOrEqualTo(bottom('title')));
expect(bottom('subtitle'), lessThan(tileRect.bottom));
} else {
expect(top('title'), equals(tileRect.top + (tileRect.height - height('title')) / 2.0));
}
expect(heightKey(trailingKey), 24.0);
}
@ -150,35 +158,40 @@ void main() {
await tester.pumpWidget(buildFrame(textScaleFactor: 4.0));
testChildren();
testHorizontalGeometry();
testVerticalGeometry(64.0);
testVerticalGeometry(72.0);
await tester.pumpWidget(buildFrame(dense: true, textScaleFactor: 4.0));
testChildren();
testHorizontalGeometry();
testVerticalGeometry(64.0);
testVerticalGeometry(72.0);
await tester.pumpWidget(buildFrame(isTwoLine: true, textScaleFactor: 4.0));
testChildren();
testHorizontalGeometry();
testVerticalGeometry(120.0);
testVerticalGeometry(128.0);
// Make sure that the height of a large subtitle is taken into account.
await tester.pumpWidget(buildFrame(isTwoLine: true, textScaleFactor: 0.5, subtitleScaleFactor: 4.0));
testChildren();
testHorizontalGeometry();
testVerticalGeometry(72.0);
await tester.pumpWidget(buildFrame(isTwoLine: true, dense: true, textScaleFactor: 4.0));
testChildren();
testHorizontalGeometry();
testVerticalGeometry(120.0);
testVerticalGeometry(128.0);
await tester.pumpWidget(buildFrame(isThreeLine: true, textScaleFactor: 4.0));
testChildren();
testHorizontalGeometry();
testVerticalGeometry(120.0);
testVerticalGeometry(128.0);
await tester.pumpWidget(buildFrame(isThreeLine: true, dense: true, textScaleFactor: 4.0));
testChildren();
testHorizontalGeometry();
testVerticalGeometry(120.0);
testVerticalGeometry(128.0);
});
testWidgets('ListTile geometry (RTL)', (WidgetTester tester) async {
const double leftPadding = 10.0;
const double rightPadding = 20.0;
@ -477,7 +490,6 @@ void main() {
expect(right('L'), 790.0); // 800 - contentPadding.start
});
testWidgets('ListTileTheme wide leading Widget', (WidgetTester tester) async {
const Key leadingKey = const ValueKey<String>('L');
@ -544,7 +556,5 @@ void main() {
expect(tester.getBottomLeft(find.byKey(leadingKey)), const Offset(800.0 - 56.0, 52.0));
expect(right('title'), 800.0 - 72.0);
expect(right('subtitle'), 800.0 - 72.0);
});
}