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[Plot] Pan with alt-key

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While alt is held, treat drag gestures in a plot area
as a pan, WTD-1273.
This commit is contained in:
Victor Woeltjen 2015-06-20 11:19:56 -07:00
parent 215d3ffd72
commit 53f712b506
1 changed files with 49 additions and 3 deletions
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52
platform/features/plot/src/SubPlot.js
View File

@ -56,6 +56,8 @@ define(
domainOffset,
mousePosition,
marqueeStart,
panStart,
panStartBounds,
hoverCoordinates,
isHovering = false;
@ -155,6 +157,25 @@ define(
tickGenerator.generateRangeTicks(RANGE_TICKS);
}
function updatePan() {
var start, current, delta, nextOrigin;
// Clear the previous panning pan-zoom state
panZoomStack.popPanZoom();
// Calculate what the new resulting pan-zoom should be
start = mousePositionToDomainRange(panStart);
current = mousePositionToDomainRange(mousePosition);
delta = [ current[0] - start[0], current[1] - start[1] ];
nextOrigin = [
panStartBounds.origin[0] - delta[0],
panStartBounds.origin[1] - delta[1]
];
// ...and push a new one at the current mouse position
panZoomStack.pushPanZoom(nextOrigin, panStartBounds.dimensions);
}
// Perform a marquee zoom.
function marqueeZoom(start, end) {
@ -246,14 +267,34 @@ define(
if (marqueeStart) {
updateMarqueeBox();
}
if (panStart) {
updatePan();
updateDrawingBounds();
}
},
/**
* Initiate a marquee zoom action.
* @param $event the mouse event
*/
startMarquee: function ($event) {
mousePosition = marqueeStart = toMousePosition($event);
updateMarqueeBox();
mousePosition = toMousePosition($event);
if (event.altKey) {
// Start panning
panStart = mousePosition;
panStartBounds = panZoomStack.getPanZoom();
// We're starting a pan, so add this back as a
// state on the stack; it will get replaced
// during the pan.
panZoomStack.pushPanZoom(
panStartBounds.origin,
panStartBounds.dimensions
);
$event.preventDefault();
} else {
// Start marquee zooming
marqueeStart = mousePosition;
updateMarqueeBox();
}
},
/**
* Complete a marquee zoom action.
@ -267,6 +308,11 @@ define(
updateMarqueeBox();
updateDrawingBounds();
}
if (panStart) {
// End panning
panStart = undefined;
panStartBounds = undefined;
}
},
/**
* Update the drawing bounds, marquee box, and
@ -311,4 +357,4 @@ define(
return SubPlot;
}
);
);