* @fileoverview The default interaction model for Dygraphs. This is kept out
* of dygraph.js for better navigability.
* @author Robert Konigsberg (konigsberg@google.com)
*/
* @fileoverview The default interaction model for Dygraphs. This is kept out
* of dygraph.js for better navigability.
* @author Robert Konigsberg (konigsberg@google.com)
*/
* dragStartX/dragStartY/etc. properties). This function modifies the context.
*/
Dygraph.Interaction.startPan = function(event, g, context) {
* dragStartX/dragStartY/etc. properties). This function modifies the context.
*/
Dygraph.Interaction.startPan = function(event, g, context) {
context.isPanning = true;
var xRange = g.xAxisRange();
context.dateRange = xRange[1] - xRange[0];
context.isPanning = true;
var xRange = g.xAxisRange();
context.dateRange = xRange[1] - xRange[0];
var yExtremes = axis.extremeRange;
var boundedTopY = g.toDomYCoord(yExtremes[0], i) + maxYPixelsToDraw;
var yExtremes = axis.extremeRange;
var boundedTopY = g.toDomYCoord(yExtremes[0], i) + maxYPixelsToDraw;
// Record the range of each y-axis at the start of the drag.
// If any axis has a valueRange or valueWindow, then we want a 2D pan.
context.is2DPan = false;
// Record the range of each y-axis at the start of the drag.
// If any axis has a valueRange or valueWindow, then we want a 2D pan.
context.is2DPan = false;
var yRange = g.yAxisRange(i);
// TODO(konigsberg): These values should be in |context|.
// In log scale, initialTopValue, dragValueRange and unitsPerPixel are log scale.
var yRange = g.yAxisRange(i);
// TODO(konigsberg): These values should be in |context|.
// In log scale, initialTopValue, dragValueRange and unitsPerPixel are log scale.
var pixelsDragged = context.dragEndY - context.dragStartY;
var unitsDragged = pixelsDragged * axis.unitsPerPixel;
var pixelsDragged = context.dragEndY - context.dragStartY;
var unitsDragged = pixelsDragged * axis.unitsPerPixel;
var boundedValue = context.boundedValues ? context.boundedValues[i] : null;
// In log scale, maxValue and minValue are the logs of those values.
var boundedValue = context.boundedValues ? context.boundedValues[i] : null;
// In log scale, maxValue and minValue are the logs of those values.
var regionHeight = Math.abs(context.dragEndY - context.dragStartY);
if (regionWidth < 2 && regionHeight < 2 &&
var regionHeight = Math.abs(context.dragEndY - context.dragStartY);
if (regionWidth < 2 && regionHeight < 2 &&
var p = g.selPoints_[i];
var distance = Math.pow(p.canvasx - context.dragEndX, 2) +
Math.pow(p.canvasy - context.dragEndY, 2);
var p = g.selPoints_[i];
var distance = Math.pow(p.canvasx - context.dragEndX, 2) +
Math.pow(p.canvasy - context.dragEndY, 2);
var regionHeight = Math.abs(context.dragEndY - context.dragStartY);
if (regionWidth < 2 && regionHeight < 2 &&
var regionHeight = Math.abs(context.dragEndY - context.dragStartY);
if (regionWidth < 2 && regionHeight < 2 &&
g.doZoomY_(Math.min(context.dragStartY, context.dragEndY),
Math.max(context.dragStartY, context.dragEndY));
} else {
g.doZoomY_(Math.min(context.dragStartY, context.dragEndY),
Math.max(context.dragStartY, context.dragEndY));
} else {
var regionHeight = Math.abs(context.dragEndY - context.dragStartY);
if (regionWidth < 2 && regionHeight < 2 &&
var regionHeight = Math.abs(context.dragEndY - context.dragStartY);
if (regionWidth < 2 && regionHeight < 2 &&