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51 lines
1.8 KiB
Dart
51 lines
1.8 KiB
Dart
// Copyright 2018 the Charts project authors. Please see the AUTHORS file
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// for details.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import 'package:charts_common/common.dart' as common
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show GraphicsFactory, LineStyle, TextElement, TextStyle;
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import 'package:flutter_web/widgets.dart' show BuildContext, MediaQuery;
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import 'line_style.dart' show LineStyle;
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import 'text_element.dart' show TextElement;
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import 'text_style.dart' show TextStyle;
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class GraphicsFactory implements common.GraphicsFactory {
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final double textScaleFactor;
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GraphicsFactory(BuildContext context,
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{GraphicsFactoryHelper helper = const GraphicsFactoryHelper()})
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: textScaleFactor = helper.getTextScaleFactorOf(context);
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/// Returns a [TextStyle] object.
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@override
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common.TextStyle createTextPaint() => new TextStyle();
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/// Returns a text element from [text] and [style].
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@override
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common.TextElement createTextElement(String text) {
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return new TextElement(text, textScaleFactor: textScaleFactor);
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}
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@override
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common.LineStyle createLinePaint() => new LineStyle();
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}
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/// Wraps the MediaQuery function to allow for testing.
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class GraphicsFactoryHelper {
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const GraphicsFactoryHelper();
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double getTextScaleFactorOf(BuildContext context) =>
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MediaQuery.textScaleFactorOf(context);
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}
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