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[Plot] Avoid displaying bad labels

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Avoid displaying bad labels for tick marks, or in the
coordinates shown on hover. Done in the context of
refactoring to support WTD-625.
This commit is contained in:
Victor Woeltjen
2014-12-12 15:03:47 -08:00
parent b1158ce230
commit 662412a31d
4 changed files with 26 additions and 10 deletions
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22
platform/features/plot/src/SubPlot.js
View File

@ -33,6 +33,7 @@ define(
domainOffset,
mousePosition,
marqueeStart,
hoverCoordinates,
isHovering = false;
// Utility, for map/forEach loops. Index 0 is domain,
@ -43,6 +44,11 @@ define(
formatter.formatDomainValue)(v);
}
// Utility function for filtering out empty strings.
function isNonEmpty(v) {
return typeof v === 'string' && v !== "";
}
// Converts from pixel coordinates to domain-range,
// to interpret mouse gestures.
function mousePositionToDomainRange(mousePosition) {
@ -79,6 +85,16 @@ define(
return [ position[0] - domainOffset, position[1] ];
}
// Update the currnet hover coordinates
function updateHoverCoordinates() {
hoverCoordinates = mousePosition &&
mousePositionToDomainRange(mousePosition)
.map(formatValue)
.filter(isNonEmpty)
.join(", ");
}
// Update the drawable marquee area to reflect current
// mouse position (or don't show it at all, if no marquee
// zoom is in progress)
@ -191,10 +207,7 @@ define(
* coordinates over which the mouse is hovered
*/
getHoverCoordinates: function () {
return mousePosition ?
mousePositionToDomainRange(
mousePosition
).map(formatValue) : [];
return hoverCoordinates;
},
/**
* Handle mouse movement over the chart area.
@ -203,6 +216,7 @@ define(
hover: function ($event) {
isHovering = true;
mousePosition = toMousePosition($event);
updateHoverCoordinates();
if (marqueeStart) {
updateMarqueeBox();
}