+++ /dev/null
-// Copyright (c) 2013 Google, Inc.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-
-/*global Dygraph:false */
-
-/**
- * @fileoverview Plug-in for providing unzoom-on-hover.
- *
- * @author konigsberg@google.com (Robert Konigsberg)
- */
-Dygraph.Plugins.Unzoom = (function() {
-
- "use strict";
-
- /**
- * Create a new instance.
- *
- * @constructor
- */
- var unzoom = function() {
- this.button_ = null;
-
- // True when the mouse is over the canvas. Must be tracked
- // because the unzoom button state can change even when the
- // mouse-over state hasn't.
- this.over_ = false;
- };
-
- unzoom.prototype.toString = function() {
- return 'Unzoom Plugin';
- };
-
- unzoom.prototype.activate = function(g) {
- return {
- willDrawChart: this.willDrawChart
- };
- };
-
- unzoom.prototype.willDrawChart = function(e) {
- var g = e.dygraph;
-
- if (this.button_ !== null) {
- // short-circuit: show the button only when we're moused over, and zoomed in.
- var showButton = g.isZoomed() && this.over_;
- this.show(showButton);
- return;
- }
-
- this.button_ = document.createElement('button');
- this.button_.innerHTML = 'Reset Zoom';
- this.button_.style.display = 'none';
- this.button_.style.position = 'absolute';
- var area = g.plotter_.area;
- this.button_.style.top = (area.y + 4) + 'px';
- this.button_.style.left = (area.x + 4) + 'px';
- this.button_.style.zIndex = 11;
- var parent = g.graphDiv;
- parent.insertBefore(this.button_, parent.firstChild);
-
- var self = this;
- this.button_.onclick = function() {
- g.resetZoom();
- };
-
- g.addAndTrackEvent(parent, 'mouseover', function() {
- if (g.isZoomed()) {
- self.show(true);
- }
- self.over_ = true;
- });
-
- g.addAndTrackEvent(parent, 'mouseout', function() {
- self.show(false);
- self.over_ = false;
- });
- };
-
- unzoom.prototype.show = function(enabled) {
- this.button_.style.display = enabled ? '' : 'none';
- };
-
- unzoom.prototype.destroy = function() {
- this.button_.parentElement.removeChild(this.button_);
- };
-
- return unzoom;
-
-})();