--- /dev/null
+/**
+ * @license
+ * Copyright 2011 Robert Konigsberg (konigsberg@google.com)
+ * MIT-licensed (http://opensource.org/licenses/MIT)
+ */
+
+/**
+ * @fileoverview The default interaction model for Dygraphs. This is kept out
+ * of dygraph.js for better navigability.
+ * @author Robert Konigsberg (konigsberg@google.com)
+ */
+
+/*jshint globalstrict: true */
+/*global Dygraph:false */
+"use strict";
+
+/**
+ * A collection of functions to facilitate build custom interaction models.
+ * @class
+ */
+Dygraph.Interaction = {};
+
+/**
+ * Called in response to an interaction model operation that
+ * should start the default panning behavior.
+ *
+ * It's used in the default callback for "mousedown" operations.
+ * Custom interaction model builders can use it to provide the default
+ * panning behavior.
+ *
+ * @param {Event} event the event object which led to the startPan call.
+ * @param {Dygraph} g The dygraph on which to act.
+ * @param {Object} context The dragging context object (with
+ * dragStartX/dragStartY/etc. properties). This function modifies the
+ * context.
+ */
+Dygraph.Interaction.startPan = function(event, g, context) {
+ var i, axis;
+ context.isPanning = true;
+ var xRange = g.xAxisRange();
+ context.dateRange = xRange[1] - xRange[0];
+ context.initialLeftmostDate = xRange[0];
+ context.xUnitsPerPixel = context.dateRange / (g.plotter_.area.w - 1);
+
+ if (g.attr_("panEdgeFraction")) {
+ var maxXPixelsToDraw = g.width_ * g.attr_("panEdgeFraction");
+ var xExtremes = g.xAxisExtremes(); // I REALLY WANT TO CALL THIS xTremes!
+
+ var boundedLeftX = g.toDomXCoord(xExtremes[0]) - maxXPixelsToDraw;
+ var boundedRightX = g.toDomXCoord(xExtremes[1]) + maxXPixelsToDraw;
+
+ var boundedLeftDate = g.toDataXCoord(boundedLeftX);
+ var boundedRightDate = g.toDataXCoord(boundedRightX);
+ context.boundedDates = [boundedLeftDate, boundedRightDate];
+
+ var boundedValues = [];
+ var maxYPixelsToDraw = g.height_ * g.attr_("panEdgeFraction");
+
+ for (i = 0; i < g.axes_.length; i++) {
+ axis = g.axes_[i];
+ var yExtremes = axis.extremeRange;
+
+ var boundedTopY = g.toDomYCoord(yExtremes[0], i) + maxYPixelsToDraw;
+ var boundedBottomY = g.toDomYCoord(yExtremes[1], i) - maxYPixelsToDraw;
+
+ var boundedTopValue = g.toDataYCoord(boundedTopY, i);
+ var boundedBottomValue = g.toDataYCoord(boundedBottomY, i);
+
+ boundedValues[i] = [boundedTopValue, boundedBottomValue];
+ }
+ context.boundedValues = boundedValues;
+ }
+
+ // 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.
+ // We can't store data directly in g.axes_, because it does not belong to us
+ // and could change out from under us during a pan (say if there's a data
+ // update).
+ context.is2DPan = false;
+ context.axes = [];
+ for (i = 0; i < g.axes_.length; i++) {
+ axis = g.axes_[i];
+ var axis_data = {};
+ var yRange = g.yAxisRange(i);
+ // TODO(konigsberg): These values should be in |context|.
+ // In log scale, initialTopValue, dragValueRange and unitsPerPixel are log scale.
+ var logscale = g.attributes_.getForAxis("logscale", i);
+ if (logscale) {
+ axis_data.initialTopValue = Dygraph.log10(yRange[1]);
+ axis_data.dragValueRange = Dygraph.log10(yRange[1]) - Dygraph.log10(yRange[0]);
+ } else {
+ axis_data.initialTopValue = yRange[1];
+ axis_data.dragValueRange = yRange[1] - yRange[0];
+ }
+ axis_data.unitsPerPixel = axis_data.dragValueRange / (g.plotter_.area.h - 1);
+ context.axes.push(axis_data);
+
+ // While calculating axes, set 2dpan.
+ if (axis.valueWindow || axis.valueRange) context.is2DPan = true;
+ }
+};
+
+/**
+ * Called in response to an interaction model operation that
+ * responds to an event that pans the view.
+ *
+ * It's used in the default callback for "mousemove" operations.
+ * Custom interaction model builders can use it to provide the default
+ * panning behavior.
+ *
+ * @param {Event} event the event object which led to the movePan call.
+ * @param {Dygraph} g The dygraph on which to act.
+ * @param {Object} context The dragging context object (with
+ * dragStartX/dragStartY/etc. properties). This function modifies the
+ * context.
+ */
+Dygraph.Interaction.movePan = function(event, g, context) {
+ context.dragEndX = g.dragGetX_(event, context);
+ context.dragEndY = g.dragGetY_(event, context);
+
+ var minDate = context.initialLeftmostDate -
+ (context.dragEndX - context.dragStartX) * context.xUnitsPerPixel;
+ if (context.boundedDates) {
+ minDate = Math.max(minDate, context.boundedDates[0]);
+ }
+ var maxDate = minDate + context.dateRange;
+ if (context.boundedDates) {
+ if (maxDate > context.boundedDates[1]) {
+ // Adjust minDate, and recompute maxDate.
+ minDate = minDate - (maxDate - context.boundedDates[1]);
+ maxDate = minDate + context.dateRange;
+ }
+ }
+
+ g.dateWindow_ = [minDate, maxDate];
+
+ // y-axis scaling is automatic unless this is a full 2D pan.
+ if (context.is2DPan) {
+
+ var pixelsDragged = context.dragEndY - context.dragStartY;
+
+ // Adjust each axis appropriately.
+ for (var i = 0; i < g.axes_.length; i++) {
+ var axis = g.axes_[i];
+ var axis_data = context.axes[i];
+ var unitsDragged = pixelsDragged * axis_data.unitsPerPixel;
+
+ var boundedValue = context.boundedValues ? context.boundedValues[i] : null;
+
+ // In log scale, maxValue and minValue are the logs of those values.
+ var maxValue = axis_data.initialTopValue + unitsDragged;
+ if (boundedValue) {
+ maxValue = Math.min(maxValue, boundedValue[1]);
+ }
+ var minValue = maxValue - axis_data.dragValueRange;
+ if (boundedValue) {
+ if (minValue < boundedValue[0]) {
+ // Adjust maxValue, and recompute minValue.
+ maxValue = maxValue - (minValue - boundedValue[0]);
+ minValue = maxValue - axis_data.dragValueRange;
+ }
+ }
+ var logscale = g.attributes_.getForAxis("logscale", i);
+ if (logscale) {
+ axis.valueWindow = [ Math.pow(Dygraph.LOG_SCALE, minValue),
+ Math.pow(Dygraph.LOG_SCALE, maxValue) ];
+ } else {
+ axis.valueWindow = [ minValue, maxValue ];
+ }
+ }
+ }
+
+ g.drawGraph_(false);
+};
+
+/**
+ * Called in response to an interaction model operation that
+ * responds to an event that ends panning.
+ *
+ * It's used in the default callback for "mouseup" operations.
+ * Custom interaction model builders can use it to provide the default
+ * panning behavior.
+ *
+ * @param {Event} event the event object which led to the endPan call.
+ * @param {Dygraph} g The dygraph on which to act.
+ * @param {Object} context The dragging context object (with
+ * dragStartX/dragStartY/etc. properties). This function modifies the
+ * context.
+ */
+Dygraph.Interaction.endPan = function(event, g, context) {
+ context.dragEndX = g.dragGetX_(event, context);
+ context.dragEndY = g.dragGetY_(event, context);
+
+ var regionWidth = Math.abs(context.dragEndX - context.dragStartX);
+ var regionHeight = Math.abs(context.dragEndY - context.dragStartY);
+
+ if (regionWidth < 2 && regionHeight < 2 &&
+ g.lastx_ !== undefined && g.lastx_ != -1) {
+ Dygraph.Interaction.treatMouseOpAsClick(g, event, context);
+ }
+
+ // TODO(konigsberg): mouseup should just delete the
+ // context object, and mousedown should create a new one.
+ context.isPanning = false;
+ context.is2DPan = false;
+ context.initialLeftmostDate = null;
+ context.dateRange = null;
+ context.valueRange = null;
+ context.boundedDates = null;
+ context.boundedValues = null;
+ context.axes = null;
+};
+
+/**
+ * Called in response to an interaction model operation that
+ * responds to an event that starts zooming.
+ *
+ * It's used in the default callback for "mousedown" operations.
+ * Custom interaction model builders can use it to provide the default
+ * zooming behavior.
+ *
+ * @param {Event} event the event object which led to the startZoom call.
+ * @param {Dygraph} g The dygraph on which to act.
+ * @param {Object} context The dragging context object (with
+ * dragStartX/dragStartY/etc. properties). This function modifies the
+ * context.
+ */
+Dygraph.Interaction.startZoom = function(event, g, context) {
+ context.isZooming = true;
+ context.zoomMoved = false;
+};
+
+/**
+ * Called in response to an interaction model operation that
+ * responds to an event that defines zoom boundaries.
+ *
+ * It's used in the default callback for "mousemove" operations.
+ * Custom interaction model builders can use it to provide the default
+ * zooming behavior.
+ *
+ * @param {Event} event the event object which led to the moveZoom call.
+ * @param {Dygraph} g The dygraph on which to act.
+ * @param {Object} context The dragging context object (with
+ * dragStartX/dragStartY/etc. properties). This function modifies the
+ * context.
+ */
+Dygraph.Interaction.moveZoom = function(event, g, context) {
+ context.zoomMoved = true;
+ context.dragEndX = g.dragGetX_(event, context);
+ context.dragEndY = g.dragGetY_(event, context);
+
+ var xDelta = Math.abs(context.dragStartX - context.dragEndX);
+ var yDelta = Math.abs(context.dragStartY - context.dragEndY);
+
+ // drag direction threshold for y axis is twice as large as x axis
+ context.dragDirection = (xDelta < yDelta / 2) ? Dygraph.VERTICAL : Dygraph.HORIZONTAL;
+
+ g.drawZoomRect_(
+ context.dragDirection,
+ context.dragStartX,
+ context.dragEndX,
+ context.dragStartY,
+ context.dragEndY,
+ context.prevDragDirection,
+ context.prevEndX,
+ context.prevEndY);
+
+ context.prevEndX = context.dragEndX;
+ context.prevEndY = context.dragEndY;
+ context.prevDragDirection = context.dragDirection;
+};
+
+/**
+ * @param {Dygraph} g
+ * @param {Event} event
+ * @param {Object} context
+ */
+Dygraph.Interaction.treatMouseOpAsClick = function(g, event, context) {
+ var clickCallback = g.attr_('clickCallback');
+ var pointClickCallback = g.attr_('pointClickCallback');
+
+ var selectedPoint = null;
+
+ // Find out if the click occurs on a point. This only matters if there's a
+ // pointClickCallback.
+ if (pointClickCallback) {
+ var closestIdx = -1;
+ var closestDistance = Number.MAX_VALUE;
+
+ // check if the click was on a particular point.
+ for (var i = 0; i < g.selPoints_.length; i++) {
+ var p = g.selPoints_[i];
+ var distance = Math.pow(p.canvasx - context.dragEndX, 2) +
+ Math.pow(p.canvasy - context.dragEndY, 2);
+ if (!isNaN(distance) &&
+ (closestIdx == -1 || distance < closestDistance)) {
+ closestDistance = distance;
+ closestIdx = i;
+ }
+ }
+
+ // Allow any click within two pixels of the dot.
+ var radius = g.attr_('highlightCircleSize') + 2;
+ if (closestDistance <= radius * radius) {
+ selectedPoint = g.selPoints_[closestIdx];
+ }
+ }
+
+ if (selectedPoint) {
+ pointClickCallback(event, selectedPoint);
+ }
+
+ // TODO(danvk): pass along more info about the points, e.g. 'x'
+ if (clickCallback) {
+ clickCallback(event, g.lastx_, g.selPoints_);
+ }
+};
+
+/**
+ * Called in response to an interaction model operation that
+ * responds to an event that performs a zoom based on previously defined
+ * bounds..
+ *
+ * It's used in the default callback for "mouseup" operations.
+ * Custom interaction model builders can use it to provide the default
+ * zooming behavior.
+ *
+ * @param {Event} event the event object which led to the endZoom call.
+ * @param {Dygraph} g The dygraph on which to end the zoom.
+ * @param {Object} context The dragging context object (with
+ * dragStartX/dragStartY/etc. properties). This function modifies the
+ * context.
+ */
+Dygraph.Interaction.endZoom = function(event, g, context) {
+ context.isZooming = false;
+ context.dragEndX = g.dragGetX_(event, context);
+ context.dragEndY = g.dragGetY_(event, context);
+ var regionWidth = Math.abs(context.dragEndX - context.dragStartX);
+ var regionHeight = Math.abs(context.dragEndY - context.dragStartY);
+
+ if (regionWidth < 2 && regionHeight < 2 &&
+ g.lastx_ !== undefined && g.lastx_ != -1) {
+ Dygraph.Interaction.treatMouseOpAsClick(g, event, context);
+ }
+
+ // The zoom rectangle is visibly clipped to the plot area, so its behavior
+ // should be as well.
+ // See http://code.google.com/p/dygraphs/issues/detail?id=280
+ var plotArea = g.getArea();
+ if (regionWidth >= 10 && context.dragDirection == Dygraph.HORIZONTAL) {
+ var left = Math.min(context.dragStartX, context.dragEndX),
+ right = Math.max(context.dragStartX, context.dragEndX);
+ left = Math.max(left, plotArea.x);
+ right = Math.min(right, plotArea.x + plotArea.w);
+ if (left < right) {
+ g.doZoomX_(left, right);
+ }
+ context.cancelNextDblclick = true;
+ } else if (regionHeight >= 10 && context.dragDirection == Dygraph.VERTICAL) {
+ var top = Math.min(context.dragStartY, context.dragEndY),
+ bottom = Math.max(context.dragStartY, context.dragEndY);
+ top = Math.max(top, plotArea.y);
+ bottom = Math.min(bottom, plotArea.y + plotArea.h);
+ if (top < bottom) {
+ g.doZoomY_(top, bottom);
+ }
+ context.cancelNextDblclick = true;
+ } else {
+ if (context.zoomMoved) g.clearZoomRect_();
+ }
+ context.dragStartX = null;
+ context.dragStartY = null;
+};
+
+/**
+ * @private
+ */
+Dygraph.Interaction.startTouch = function(event, g, context) {
+ event.preventDefault(); // touch browsers are all nice.
+ if (event.touches.length > 1) {
+ // If the user ever puts two fingers down, it's not a double tap.
+ context.startTimeForDoubleTapMs = null;
+ }
+
+ var touches = [];
+ for (var i = 0; i < event.touches.length; i++) {
+ var t = event.touches[i];
+ // we dispense with 'dragGetX_' because all touchBrowsers support pageX
+ touches.push({
+ pageX: t.pageX,
+ pageY: t.pageY,
+ dataX: g.toDataXCoord(t.pageX),
+ dataY: g.toDataYCoord(t.pageY)
+ // identifier: t.identifier
+ });
+ }
+ context.initialTouches = touches;
+
+ if (touches.length == 1) {
+ // This is just a swipe.
+ context.initialPinchCenter = touches[0];
+ context.touchDirections = { x: true, y: true };
+ } else if (touches.length >= 2) {
+ // It's become a pinch!
+ // In case there are 3+ touches, we ignore all but the "first" two.
+
+ // only screen coordinates can be averaged (data coords could be log scale).
+ context.initialPinchCenter = {
+ pageX: 0.5 * (touches[0].pageX + touches[1].pageX),
+ pageY: 0.5 * (touches[0].pageY + touches[1].pageY),
+
+ // TODO(danvk): remove
+ dataX: 0.5 * (touches[0].dataX + touches[1].dataX),
+ dataY: 0.5 * (touches[0].dataY + touches[1].dataY)
+ };
+
+ // Make pinches in a 45-degree swath around either axis 1-dimensional zooms.
+ var initialAngle = 180 / Math.PI * Math.atan2(
+ context.initialPinchCenter.pageY - touches[0].pageY,
+ touches[0].pageX - context.initialPinchCenter.pageX);
+
+ // use symmetry to get it into the first quadrant.
+ initialAngle = Math.abs(initialAngle);
+ if (initialAngle > 90) initialAngle = 90 - initialAngle;
+
+ context.touchDirections = {
+ x: (initialAngle < (90 - 45/2)),
+ y: (initialAngle > 45/2)
+ };
+ }
+
+ // save the full x & y ranges.
+ context.initialRange = {
+ x: g.xAxisRange(),
+ y: g.yAxisRange()
+ };
+};
+
+/**
+ * @private
+ */
+Dygraph.Interaction.moveTouch = function(event, g, context) {
+ // If the tap moves, then it's definitely not part of a double-tap.
+ context.startTimeForDoubleTapMs = null;
+
+ var i, touches = [];
+ for (i = 0; i < event.touches.length; i++) {
+ var t = event.touches[i];
+ touches.push({
+ pageX: t.pageX,
+ pageY: t.pageY
+ });
+ }
+ var initialTouches = context.initialTouches;
+
+ var c_now;
+
+ // old and new centers.
+ var c_init = context.initialPinchCenter;
+ if (touches.length == 1) {
+ c_now = touches[0];
+ } else {
+ c_now = {
+ pageX: 0.5 * (touches[0].pageX + touches[1].pageX),
+ pageY: 0.5 * (touches[0].pageY + touches[1].pageY)
+ };
+ }
+
+ // this is the "swipe" component
+ // we toss it out for now, but could use it in the future.
+ var swipe = {
+ pageX: c_now.pageX - c_init.pageX,
+ pageY: c_now.pageY - c_init.pageY
+ };
+ var dataWidth = context.initialRange.x[1] - context.initialRange.x[0];
+ var dataHeight = context.initialRange.y[0] - context.initialRange.y[1];
+ swipe.dataX = (swipe.pageX / g.plotter_.area.w) * dataWidth;
+ swipe.dataY = (swipe.pageY / g.plotter_.area.h) * dataHeight;
+ var xScale, yScale;
+
+ // The residual bits are usually split into scale & rotate bits, but we split
+ // them into x-scale and y-scale bits.
+ if (touches.length == 1) {
+ xScale = 1.0;
+ yScale = 1.0;
+ } else if (touches.length >= 2) {
+ var initHalfWidth = (initialTouches[1].pageX - c_init.pageX);
+ xScale = (touches[1].pageX - c_now.pageX) / initHalfWidth;
+
+ var initHalfHeight = (initialTouches[1].pageY - c_init.pageY);
+ yScale = (touches[1].pageY - c_now.pageY) / initHalfHeight;
+ }
+
+ // Clip scaling to [1/8, 8] to prevent too much blowup.
+ xScale = Math.min(8, Math.max(0.125, xScale));
+ yScale = Math.min(8, Math.max(0.125, yScale));
+
+ var didZoom = false;
+ if (context.touchDirections.x) {
+ g.dateWindow_ = [
+ c_init.dataX - swipe.dataX + (context.initialRange.x[0] - c_init.dataX) / xScale,
+ c_init.dataX - swipe.dataX + (context.initialRange.x[1] - c_init.dataX) / xScale
+ ];
+ didZoom = true;
+ }
+
+ if (context.touchDirections.y) {
+ for (i = 0; i < 1 /*g.axes_.length*/; i++) {
+ var axis = g.axes_[i];
+ var logscale = g.attributes_.getForAxis("logscale", i);
+ if (logscale) {
+ // TODO(danvk): implement
+ } else {
+ axis.valueWindow = [
+ c_init.dataY - swipe.dataY + (context.initialRange.y[0] - c_init.dataY) / yScale,
+ c_init.dataY - swipe.dataY + (context.initialRange.y[1] - c_init.dataY) / yScale
+ ];
+ didZoom = true;
+ }
+ }
+ }
+
+ g.drawGraph_(false);
+
+ // We only call zoomCallback on zooms, not pans, to mirror desktop behavior.
+ if (didZoom && touches.length > 1 && g.attr_('zoomCallback')) {
+ var viewWindow = g.xAxisRange();
+ g.attr_("zoomCallback")(viewWindow[0], viewWindow[1], g.yAxisRanges());
+ }
+};
+
+/**
+ * @private
+ */
+Dygraph.Interaction.endTouch = function(event, g, context) {
+ if (event.touches.length !== 0) {
+ // this is effectively a "reset"
+ Dygraph.Interaction.startTouch(event, g, context);
+ } else if (event.changedTouches.length == 1) {
+ // Could be part of a "double tap"
+ // The heuristic here is that it's a double-tap if the two touchend events
+ // occur within 500ms and within a 50x50 pixel box.
+ var now = new Date().getTime();
+ var t = event.changedTouches[0];
+ if (context.startTimeForDoubleTapMs &&
+ now - context.startTimeForDoubleTapMs < 500 &&
+ context.doubleTapX && Math.abs(context.doubleTapX - t.screenX) < 50 &&
+ context.doubleTapY && Math.abs(context.doubleTapY - t.screenY) < 50) {
+ g.resetZoom();
+ } else {
+ context.startTimeForDoubleTapMs = now;
+ context.doubleTapX = t.screenX;
+ context.doubleTapY = t.screenY;
+ }
+ }
+};
+
+/**
+ * Default interation model for dygraphs. You can refer to specific elements of
+ * this when constructing your own interaction model, e.g.:
+ * g.updateOptions( {
+ * interactionModel: {
+ * mousedown: Dygraph.defaultInteractionModel.mousedown
+ * }
+ * } );
+ */
+Dygraph.Interaction.defaultModel = {
+ // Track the beginning of drag events
+ mousedown: function(event, g, context) {
+ // Right-click should not initiate a zoom.
+ if (event.button && event.button == 2) return;
+
+ context.initializeMouseDown(event, g, context);
+
+ if (event.altKey || event.shiftKey) {
+ Dygraph.startPan(event, g, context);
+ } else {
+ Dygraph.startZoom(event, g, context);
+ }
+ },
+
+ // Draw zoom rectangles when the mouse is down and the user moves around
+ mousemove: function(event, g, context) {
+ if (context.isZooming) {
+ Dygraph.moveZoom(event, g, context);
+ } else if (context.isPanning) {
+ Dygraph.movePan(event, g, context);
+ }
+ },
+
+ mouseup: function(event, g, context) {
+ if (context.isZooming) {
+ Dygraph.endZoom(event, g, context);
+ } else if (context.isPanning) {
+ Dygraph.endPan(event, g, context);
+ }
+ },
+
+ touchstart: function(event, g, context) {
+ Dygraph.Interaction.startTouch(event, g, context);
+ },
+ touchmove: function(event, g, context) {
+ Dygraph.Interaction.moveTouch(event, g, context);
+ },
+ touchend: function(event, g, context) {
+ Dygraph.Interaction.endTouch(event, g, context);
+ },
+
+ // Temporarily cancel the dragging event when the mouse leaves the graph
+ mouseout: function(event, g, context) {
+ if (context.isZooming) {
+ context.dragEndX = null;
+ context.dragEndY = null;
+ g.clearZoomRect_();
+ }
+ },
+
+ // Disable zooming out if panning.
+ dblclick: function(event, g, context) {
+ if (context.cancelNextDblclick) {
+ context.cancelNextDblclick = false;
+ return;
+ }
+ if (event.altKey || event.shiftKey) {
+ return;
+ }
+ g.resetZoom();
+ }
+};
+
+Dygraph.DEFAULT_ATTRS.interactionModel = Dygraph.Interaction.defaultModel;
+
+// old ways of accessing these methods/properties
+Dygraph.defaultInteractionModel = Dygraph.Interaction.defaultModel;
+Dygraph.endZoom = Dygraph.Interaction.endZoom;
+Dygraph.moveZoom = Dygraph.Interaction.moveZoom;
+Dygraph.startZoom = Dygraph.Interaction.startZoom;
+Dygraph.endPan = Dygraph.Interaction.endPan;
+Dygraph.movePan = Dygraph.Interaction.movePan;
+Dygraph.startPan = Dygraph.Interaction.startPan;
+
+Dygraph.Interaction.nonInteractiveModel_ = {
+ mousedown: function(event, g, context) {
+ context.initializeMouseDown(event, g, context);
+ },
+ mouseup: function(event, g, context) {
+ // TODO(danvk): this logic is repeated in Dygraph.Interaction.endZoom
+ context.dragEndX = g.dragGetX_(event, context);
+ context.dragEndY = g.dragGetY_(event, context);
+ var regionWidth = Math.abs(context.dragEndX - context.dragStartX);
+ var regionHeight = Math.abs(context.dragEndY - context.dragStartY);
+
+ if (regionWidth < 2 && regionHeight < 2 &&
+ g.lastx_ !== undefined && g.lastx_ != -1) {
+ Dygraph.Interaction.treatMouseOpAsClick(g, event, context);
+ }
+ }
+};
+
+// Default interaction model when using the range selector.
+Dygraph.Interaction.dragIsPanInteractionModel = {
+ mousedown: function(event, g, context) {
+ context.initializeMouseDown(event, g, context);
+ Dygraph.startPan(event, g, context);
+ },
+ mousemove: function(event, g, context) {
+ if (context.isPanning) {
+ Dygraph.movePan(event, g, context);
+ }
+ },
+ mouseup: function(event, g, context) {
+ if (context.isPanning) {
+ Dygraph.endPan(event, g, context);
+ }
+ }
+};
Code Review / policy / engine.git / blobdiff