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| 1 // | |
| 2 // Copyright 2014 Google Inc. All rights reserved. | |
| 3 // | |
| 4 // Use of this source code is governed by a BSD-style | |
| 5 // license that can be found in the LICENSE file or at | |
| 6 // https://developers.google.com/open-source/licenses/bsd | |
| 7 // | |
| 8 | |
| 9 part of charted.charts; | |
| 10 | |
| 11 /// | |
| 12 /// Renders the chart on a CartesianArea. | |
| 13 /// | |
| 14 abstract class CartesianRenderer extends ChartRenderer { | |
| 15 /// Returns extent of the series. This extent is used by [ChartArea] to | |
| 16 /// set the output range of the corresponding scale/axis of the series. | |
| 17 /// | |
| 18 /// Extent has valid values only if [prepare] was already called. | |
| 19 Extent get extent; | |
| 20 | |
| 21 /// Returns extent of a given row. | |
| 22 Extent extentForRow(Iterable row); | |
| 23 | |
| 24 /// Indicates if this renderer uses range "band" on any of the dimension | |
| 25 /// axis. Band is space taken on the dimension axis (if more than a point). | |
| 26 /// | |
| 27 /// Examples: | |
| 28 /// A bar chart takes up space (width of the bar) on the dimension axis. | |
| 29 /// A line chart does not take any space | |
| 30 Iterable<int> get dimensionsUsingBand; | |
| 31 | |
| 32 /// Hint for padding between two bands that [ChartArea] will use for layout. | |
| 33 /// This getter is called only for renderers that have [dimensionsUsingBand] | |
| 34 /// set to non-empty list. | |
| 35 double get bandInnerPadding; | |
| 36 | |
| 37 /// Hint for padding before first and after the last bands | |
| 38 /// This getter is called only for renderers that have [dimensionsUsingBand] | |
| 39 /// set to non-empty list. | |
| 40 double get bandOuterPadding; | |
| 41 | |
| 42 /// Render series data on the passed [host]. | |
| 43 /// Draw will not be successful if [prepare] was not already called. | |
| 44 void draw(Element host, {Future schedulePostRender}); | |
| 45 } | |
| 46 | |
| 47 /// | |
| 48 /// Renders layout visualization on a LayoutArea | |
| 49 /// | |
| 50 abstract class LayoutRenderer extends ChartRenderer { | |
| 51 /// Create a layout/visualization from the data. Layout will not be successful | |
| 52 /// if [prepare] was not already called. | |
| 53 Iterable<ChartLegendItem> layout(Element host, {Future schedulePostRender}); | |
| 54 } | |
| 55 | |
| 56 /// | |
| 57 /// Common interface for all renderers in Charted | |
| 58 /// | |
| 59 abstract class ChartRenderer extends ChartRendererBehaviorSource { | |
| 60 /// Name of the renderer. | |
| 61 /// The name can only include chars that are allowed in the CSS for selectors. | |
| 62 String get name; | |
| 63 | |
| 64 /// Prepare the chart for rendering. | |
| 65 /// - [area] represents the [ChartArea] on which the chart is rendered. | |
| 66 /// - [series] represents the [ChartSeries] that is rendered | |
| 67 bool prepare(ChartArea area, ChartSeries series); | |
| 68 | |
| 69 /// Clears DOM created by this renderer and releases | |
| 70 /// references to passed objects. | |
| 71 void dispose(); | |
| 72 } | |
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Chromium Code Reviews
Issue 1400473008:
Roll Observatory packages and add a roll script (Closed)
Base URL: git@github.com:dart-lang/observatory_pub_packages.git@master