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<!DOCTYPE html>
<!--
Copyright (c) 2015 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<link rel="import" href="/tracing/ui/base/heading.html">
<link rel="import" href="/tracing/ui/base/ui.html">
<link rel="import" href="/tracing/ui/tracks/chart_transform.html">
<link rel="import" href="/tracing/ui/tracks/track.html">
<style>
.chart-track {
height: 30px;
position: relative;
}
</style>
<script>
'use strict';
tr.exportTo('tr.ui.tracks', function() {
/**
* A track that displays a chart.
*
* @constructor
* @extends {Track}
*/
const ChartTrack =
tr.ui.b.define('chart-track', tr.ui.tracks.Track);
ChartTrack.prototype = {
__proto__: tr.ui.tracks.Track.prototype,
decorate(viewport) {
tr.ui.tracks.Track.prototype.decorate.call(this, viewport);
Polymer.dom(this).classList.add('chart-track');
this.series_ = undefined;
this.axes_ = undefined;
// GUID -> {axis: ChartSeriesYAxis, series: [ChartSeries]}.
this.axisGuidToAxisData_ = undefined;
// The maximum top and bottom padding of all series.
this.topPadding_ = undefined;
this.bottomPadding_ = undefined;
this.showYAxisLabels_ = undefined;
this.showGridLines_ = undefined;
this.heading_ = document.createElement('tr-ui-b-heading');
Polymer.dom(this).appendChild(this.heading_);
},
set heading(heading) {
this.heading_.heading = heading;
},
get heading() {
return this.heading_.heading;
},
set tooltip(tooltip) {
this.heading_.tooltip = tooltip;
},
get series() {
return this.series_;
},
/**
* Set the list of chart series to be displayed on this track. The list
* is assumed to be sorted in increasing z-order (i.e. the last series in
* the list will be drawn at the top).
*/
set series(series) {
this.series_ = series;
this.calculateAxisDataAndPadding_();
this.invalidateDrawingContainer();
},
get height() {
return window.getComputedStyle(this).height;
},
set height(height) {
this.style.height = height;
this.invalidateDrawingContainer();
},
get showYAxisLabels() {
return this.showYAxisLabels_;
},
set showYAxisLabels(showYAxisLabels) {
this.showYAxisLabels_ = showYAxisLabels;
this.invalidateDrawingContainer();
},
get showGridLines() {
return this.showGridLines_;
},
set showGridLines(showGridLines) {
this.showGridLines_ = showGridLines;
this.invalidateDrawingContainer();
},
get hasVisibleContent() {
return !!this.series && this.series.length > 0;
},
calculateAxisDataAndPadding_() {
if (!this.series_) {
this.axes_ = undefined;
this.axisGuidToAxisData_ = undefined;
this.topPadding_ = undefined;
this.bottomPadding_ = undefined;
return;
}
const axisGuidToAxisData = {};
let topPadding = 0;
let bottomPadding = 0;
this.series_.forEach(function(series) {
const seriesYAxis = series.seriesYAxis;
const axisGuid = seriesYAxis.guid;
if (!(axisGuid in axisGuidToAxisData)) {
axisGuidToAxisData[axisGuid] = {
axis: seriesYAxis,
series: []
};
if (!this.axes_) this.axes_ = [];
this.axes_.push(seriesYAxis);
}
axisGuidToAxisData[axisGuid].series.push(series);
topPadding = Math.max(topPadding, series.topPadding);
bottomPadding = Math.max(bottomPadding, series.bottomPadding);
}, this);
this.axisGuidToAxisData_ = axisGuidToAxisData;
this.topPadding_ = topPadding;
this.bottomPadding_ = bottomPadding;
},
draw(type, viewLWorld, viewRWorld, viewHeight) {
switch (type) {
case tr.ui.tracks.DrawType.GENERAL_EVENT:
this.drawChart_(viewLWorld, viewRWorld);
break;
}
},
drawChart_(viewLWorld, viewRWorld) {
if (!this.series_) return;
const ctx = this.context();
// Get track drawing parameters.
const displayTransform = this.viewport.currentDisplayTransform;
const pixelRatio = window.devicePixelRatio || 1;
const bounds = this.getBoundingClientRect();
const highDetails = this.viewport.highDetails;
// Pre-multiply all device-independent pixel parameters with the pixel
// ratio to avoid unnecessary recomputation in the performance-critical
// drawing code.
const width = bounds.width * pixelRatio;
const height = bounds.height * pixelRatio;
const topPadding = this.topPadding_ * pixelRatio;
const bottomPadding = this.bottomPadding_ * pixelRatio;
// Set up clipping.
ctx.save();
ctx.beginPath();
ctx.rect(0, 0, width, height);
ctx.clip();
// TODO(aiolos): Add support for secondary y-axis on right side of chart.
// https://github.com/catapult-project/catapult/issues/3008
// Draw y-axis grid lines.
if (this.axes_) {
if ((this.showGridLines_ || this.showYAxisLabels_) &&
this.axes_.length > 1) {
throw new Error('Only one axis allowed when showing grid lines.');
}
for (const yAxis of this.axes_) {
const chartTransform = new tr.ui.tracks.ChartTransform(
displayTransform, yAxis, width, height,
topPadding, bottomPadding, pixelRatio);
yAxis.draw(
ctx, chartTransform, this.showYAxisLabels_, this.showGridLines_);
}
}
// Draw all series in the increasing z-order.
for (const series of this.series) {
const chartTransform = new tr.ui.tracks.ChartTransform(
displayTransform, series.seriesYAxis, width, height, topPadding,
bottomPadding, pixelRatio);
series.draw(ctx, chartTransform, highDetails);
}
// Stop clipping.
ctx.restore();
},
addEventsToTrackMap(eventToTrackMap) {
// TODO(petrcermak): Consider adding the series to the track map instead
// of the track (a potential performance optimization).
this.series_.forEach(function(series) {
series.points.forEach(function(point) {
point.addToTrackMap(eventToTrackMap, this);
}, this);
}, this);
},
addIntersectingEventsInRangeToSelectionInWorldSpace(
loWX, hiWX, viewPixWidthWorld, selection) {
this.series_.forEach(function(series) {
series.addIntersectingEventsInRangeToSelectionInWorldSpace(
loWX, hiWX, viewPixWidthWorld, selection);
}, this);
},
addEventNearToProvidedEventToSelection(event, offset, selection) {
let foundItem = false;
this.series_.forEach(function(series) {
foundItem = foundItem || series.addEventNearToProvidedEventToSelection(
event, offset, selection);
}, this);
return foundItem;
},
addAllEventsMatchingFilterToSelection(filter, selection) {
// Do nothing.
},
addClosestEventToSelection(worldX, worldMaxDist, loY, hiY,
selection) {
this.series_.forEach(function(series) {
series.addClosestEventToSelection(
worldX, worldMaxDist, loY, hiY, selection);
}, this);
},
/**
* Automatically set the bounds of all axes on this track from the range of
* values of all series (in this track) associated with each of them.
*
* See the description of ChartSeriesYAxis.autoSetFromRange for the optional
* configuration argument flags.
*/
autoSetAllAxes(opt_config) {
for (const axisData of Object.values(this.axisGuidToAxisData_)) {
const seriesYAxis = axisData.axis;
const series = axisData.series;
seriesYAxis.autoSetFromSeries(series, opt_config);
}
},
/**
* Automatically set the bounds of the provided axis from the range of
* values of all series (in this track) associated with it.
*
* See the description of ChartSeriesYAxis.autoSetFromRange for the optional
* configuration argument flags.
*/
autoSetAxis(seriesYAxis, opt_config) {
const series = this.axisGuidToAxisData_[seriesYAxis.guid].series;
seriesYAxis.autoSetFromSeries(series, opt_config);
}
};
return {
ChartTrack,
};
});
</script>
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