Roll Observatory packages and add a roll script

charted/lib/charts/chart_theme.dart

-//
-// Copyright 2014 Google Inc. All rights reserved.
-//
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file or at
-// https://developers.google.com/open-source/licenses/bsd
-//
-
-part of charted.charts;
-
-/// Theme used to render the chart area, specifically colors and axes.
-///
-/// Typical implementations of ChartTheme also implement theme interfaces
-/// used by the renderers, tooltips, legends and any other behaviors.
-abstract class ChartTheme {
-  static ChartTheme current = new QuantumChartTheme();
-
-  /// Column/series when it is disabled, possibly because another is active
-  static const int STATE_INACTIVE = 0;
-
-  /// Column/Series that is normal
-  static const int STATE_NORMAL = 1;
-
-  /// Column/series that is active, possibly by a click
-  static const int STATE_ACTIVE = 2;
-
-  /// Color that can be used for key.
-  /// For a given input key, the output is always the same.
-  String getColorForKey(key, [int state]);
-
-  /// Markup for filters that is added to all chart elements. These filters
-  /// can be referenced using url() in values returned by [getFilterForState].
-  String filters;
-
-  /// Returns any filters that must be applied based on the element's state
-  String getFilterForState(int state);
-
-  /// Color for overflow and other items.
-  /// For example, the collect all bucket used by pie-chart.
-  String getOtherColor([int state]);
-
-  /// Width of the separator between two chart elements.
-  /// Used to separate pies in pie-chart, bars in grouped and stacked charts.
-  int get defaultSeparatorWidth => 1;
-
-  /// Stroke width used by all shapes.
-  int get defaultStrokeWidth => 2;
-
-  /// Default font for computation of text metrics
-  String get defaultFont;
-
-  /// Easing function for the transition
-  EasingFunction  get transitionEasingType => Transition.defaultEasingType;
-
-  /// Easing mode for the transition
-  EasingModeFunction get transitionEasingMode => Transition.defaultEasingMode;
-
-  /// Total duration of the transition in milli-seconds
-  int get transitionDurationMilliseconds => 250;
-
-  /// Theme passed to the measure axes - only used by cartesian charts
-  ChartAxisTheme getMeasureAxisTheme([Scale scale]) => null;
-
-  /// Theme passed to the dimension axes - only used by cartesian charts
-  ChartAxisTheme getDimensionAxisTheme([Scale scale]) => null;
-
-  /// Padding around the rendered chart. Defaults to 10px in all directions
-  AbsoluteRect get padding => const AbsoluteRect(10, 10, 10, 10);
-}
-
-abstract class ChartAxisTheme {
-  /// Treshold for tick length.  Setting [axisTickSize] <= [FILL_RENDER_AREA]
-  /// will make the axis span the entire height/width of the rendering area.
-  static const int FILL_RENDER_AREA = SMALL_INT_MIN;
-
-  /// Number of ticks displayed on the axis - only used when an axis is
-  /// using a quantitative scale.
-  int get axisTickCount;
-
-  /// Size of ticks on the axis. When [measureTickSize] <= [FILL_RENDER_AREA],
-  /// the painted tick will span complete height/width of the rendering area.
-  int get axisTickSize;
-
-  /// Space between axis and label for dimension axes
-  int get axisTickPadding;
-
-  /// Space between the first tick and the measure axes.
-  /// Only used on charts that don't have renderers that use "bands" of space
-  /// on the dimension axes
-  ///
-  /// Represented as a percentage of space between two consecutive ticks. The
-  /// space between two consecutive ticks is also known as the segment size.
-  double get axisOuterPadding;
-
-  /// Space between the two bands in the chart.
-  /// Only used on charts that have renderers that use "bands" of space on the
-  /// dimension axes.
-  ///
-  /// Represented as a percentage of space between two consecutive ticks. The
-  /// space between two consecutive ticks is also known as the segment size.
-  double get axisBandInnerPadding;
-
-  /// Space between the first band and the measure axis.
-  /// Only used on charts that have renderers that use "bands" of space on the
-  /// dimension axes.
-  ///
-  /// Represented as a percentage of space between two consecutive ticks. The
-  /// space between two consecutive ticks is also known as the segment size.
-  double get axisBandOuterPadding;
-
-  /// When set to true, the vertical axes resize to fit the labels.
-  bool get verticalAxisAutoResize => true;
-
-  /// Width of vertical axis when it is not resizing automatically. If
-  /// [autoResizeAxis] is set to true, [verticalAxisWidth] will be used as the
-  /// maximum width of the vertical axis.
-  ///
-  /// Height of vertical axis is automatically computed based on height of the
-  /// visualization.
-  int get verticalAxisWidth => 200;
-
-  /// Height of horizontal axis. Width of horizontal axis is automatically
-  /// computed based on width of the visualization.
-  int get horizontalAxisHeight => 200;
-
-  /// Font used by axis ticks. When specified, axis uses efficient off-screen
-  /// computation of text metrics.
-  ///
-  /// Font string must be of the following form:
-  ///   "bold italic 16px Roboto"
-  ///   "bold 16px Roboto"
-  ///   "italic 16px Roboto"
-  ///   "16px Roboto"
-  ///
-  /// When not specified, SVGTextElement's metrics API will be used.
-  String get ticksFont => null;
-}