| 1 | /** |
| 2 | * @fileoverview Test cases for resizing. |
| 3 | * |
| 4 | * @author konigsberg@google.com (Robert Konigsberg) |
| 5 | */ |
| 6 | describe("resize", function() { |
| 7 | |
| 8 | var data = |
| 9 | "X,Y\n" + |
| 10 | "1,100\n" + |
| 11 | "2,200\n" + |
| 12 | "3,300\n" + |
| 13 | "4,400\n" + |
| 14 | "5,300\n" + |
| 15 | "6,100\n"; |
| 16 | |
| 17 | beforeEach(function() { |
| 18 | document.body.innerHTML = "<div id='graph'></div>"; |
| 19 | }); |
| 20 | |
| 21 | afterEach(function() { |
| 22 | }); |
| 23 | |
| 24 | it('testResizeMaintainsMouseOperations', function() { |
| 25 | document.body.innerHTML = |
| 26 | '<div id="graph" style="width: 640px; height: 480px;"></div>' + |
| 27 | '</div>'; |
| 28 | var graph = document.getElementById("graph"); |
| 29 | |
| 30 | var callbackCount = 0; |
| 31 | var callback = function() { |
| 32 | callbackCount++; |
| 33 | } |
| 34 | |
| 35 | // Strum the mouse along the y-coordinate y, from 0 to x2. These are DOM values. |
| 36 | var strum = function(g, y, x2) { |
| 37 | DygraphOps.dispatchMouseDown_Point(g, 0, y); |
| 38 | for (var x = 0; x < x2; x++) { |
| 39 | DygraphOps.dispatchMouseMove_Point(g, x, y); |
| 40 | } |
| 41 | DygraphOps.dispatchMouseUp_Point(g, x2 - 1, y); |
| 42 | } |
| 43 | |
| 44 | var g = new Dygraph(graph, data, {highlightCallback: callback}); |
| 45 | |
| 46 | strum(g, 300, 640); |
| 47 | assert.equal(6, callbackCount); |
| 48 | |
| 49 | document.getElementById("graph").style.width = "500px"; |
| 50 | g.resize(); |
| 51 | |
| 52 | callbackCount = 0; |
| 53 | strum(g, 300, 500); |
| 54 | assert.equal(6, callbackCount); |
| 55 | }); |
| 56 | |
| 57 | /** |
| 58 | * Tests that a graph created in a not-displayed div works as expected |
| 59 | * if the graph options include height and width. Resize not needed. |
| 60 | */ |
| 61 | it('testHiddenDivWithSizedGraph', function() { |
| 62 | var div = document.getElementById("graph"); |
| 63 | |
| 64 | div.style.display = 'none'; |
| 65 | var g = new Dygraph(div, data, {width: 400, height: 300}); |
| 66 | div.style.display = ''; |
| 67 | |
| 68 | var area = g.getArea(); |
| 69 | assert.isTrue(area.w > 0); |
| 70 | assert.isTrue(area.h > 0); |
| 71 | }); |
| 72 | |
| 73 | /** |
| 74 | * Tests that a graph created in a not-displayed div with |
| 75 | * CSS-specified size but no graph height or width options works as |
| 76 | * expected. The user needs to call resize() on it after displaying |
| 77 | * it. |
| 78 | */ |
| 79 | it('testHiddenDivWithResize', function() { |
| 80 | var div = document.getElementById("graph"); |
| 81 | |
| 82 | div.style.display = 'none'; |
| 83 | div.style.width = '400px'; |
| 84 | div.style.height = '300px'; |
| 85 | |
| 86 | // Setting strokeWidth 3 removes any ambiguitiy from the pixel sampling |
| 87 | // request, below. |
| 88 | var g = new Dygraph(div, data, {strokeWidth: 3}); |
| 89 | div.style.display = ''; |
| 90 | |
| 91 | g.resize(); |
| 92 | var area = g.getArea(); |
| 93 | assert.isTrue(area.w > 0); |
| 94 | assert.isTrue(area.h > 0); |
| 95 | |
| 96 | // Regression test: check that graph remains visible after no-op resize. |
| 97 | g.resize(); |
| 98 | var x = Math.floor(g.toDomXCoord(2)); |
| 99 | var y = Math.floor(g.toDomYCoord(200)); |
| 100 | assert.deepEqual([0, 128, 128, 255], Util.samplePixel(g.hidden_, x, y), |
| 101 | "Unexpected grid color found at pixel: x: " + x + " y: " + y); |
| 102 | }); |
| 103 | |
| 104 | }); |