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8903653453
Also restored the blue line that appears below focused Input text. R=ianh@google.com Review URL: https://codereview.chromium.org/1194113002.
91 lines
2.3 KiB
Dart
91 lines
2.3 KiB
Dart
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import '../painting/text_style.dart';
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import '../theme/colors.dart';
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import '../theme/typography.dart' as typography;
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import '../widgets/basic.dart';
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import 'editable_string.dart';
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import 'editable_text.dart';
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import 'keyboard.dart';
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typedef void ValueChanged(value);
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class Input extends Component {
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Input({String key,
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this.placeholder,
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this.onChanged,
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this.focused})
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: super(key: key, stateful: true) {
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_editableValue = new EditableString(
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text: _value,
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onUpdated: _handleTextUpdated
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);
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}
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static final TextStyle _placeholderStyle = typography.black.caption;
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String placeholder;
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ValueChanged onChanged;
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bool focused = false;
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void syncFields(Input source) {
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placeholder = source.placeholder;
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onChanged = source.onChanged;
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focused = source.focused;
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}
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String _value = '';
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bool _isAttachedToKeyboard = false;
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EditableString _editableValue;
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void _handleTextUpdated() {
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scheduleBuild();
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if (_value != _editableValue.text) {
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_value = _editableValue.text;
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if (onChanged != null)
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onChanged(_value);
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}
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}
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Widget build() {
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if (focused && !_isAttachedToKeyboard) {
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keyboard.show(_editableValue.stub);
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_isAttachedToKeyboard = true;
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}
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List<Widget> textChildren = <Widget>[];
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if (placeholder != null && _value.isEmpty) {
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textChildren.add(new Text(placeholder, style: _placeholderStyle));
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}
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textChildren.add(
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new EditableText(value: _editableValue, focused: focused)
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);
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Border focusHighlight = new Border(bottom: new BorderSide(
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color: focused ? Blue[400] : Grey[200],
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width: focused ? 2.0 : 1.0
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));
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// TODO(hansmuller): white-space: pre, height: 1.2em.
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Container input = new Container(
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child: new Stack(textChildren),
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padding: const EdgeDims.only(left: 8.0, right: 8.0, bottom: 12.0),
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decoration: new BoxDecoration(border: focusHighlight)
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);
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return new Listener(
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child: input,
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onPointerDown: (_) => keyboard.showByRequest()
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);
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}
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void didUnmount() {
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if (_isAttachedToKeyboard)
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keyboard.hide();
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super.didUnmount();
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}
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}
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