x axis log scale.

[dygraphs.git] / auto_tests / tests / to_dom_coords.js

diff --git a/auto_tests/tests/to_dom_coords.js b/auto_tests/tests/to_dom_coords.js
index 3def1ef..70518a1 100644 (file)
--- a/auto_tests/tests/to_dom_coords.js
+++ b/auto_tests/tests/to_dom_coords.js
@@ -6,16 +6,16 @@
 
 var ToDomCoordsTestCase = TestCase("to-dom-coords");
 
-var _origFunc = Dygraph.getContext;
+ToDomCoordsTestCase._origFunc = Dygraph.getContext;
 ToDomCoordsTestCase.prototype.setUp = function() {
   document.body.innerHTML = "<div id='graph'></div>";
   Dygraph.getContext = function(canvas) {
-    return new Proxy(_origFunc(canvas));
+    return new Proxy(ToDomCoordsTestCase._origFunc(canvas));
   }
 };
 
 ToDomCoordsTestCase.prototype.tearDown = function() {
-  Dygraph.getContext = _origFunc;
+  Dygraph.getContext = ToDomCoordsTestCase._origFunc;
 };
 
 // Checks that toDomCoords and toDataCoords are inverses of one another.
@@ -34,10 +34,16 @@ ToDomCoordsTestCase.prototype.checkForInverses = function(g) {
 
 ToDomCoordsTestCase.prototype.testPlainChart = function() {
   var opts = {
-    drawXAxis: false,
-    drawYAxis: false,
-    drawXGrid: false,
-    drawYGrid: false,
+    axes : {
+      x : {
+        drawAxis : false,
+        drawGrid : false,
+      },
+      y : {
+        drawAxis : false,
+        drawGrid : false,
+      }
+    },
     rightGap: 0,
     valueRange: [0, 100],
     dateWindow: [0, 100],
@@ -165,3 +171,102 @@ ToDomCoordsTestCase.prototype.testAxisTickSize = function() {
   assertEquals([200, 0], g.toDomCoords(0, 100));
   assertEquals([500, 386], g.toDomCoords(100, 0));
 }
+
+ToDomCoordsTestCase.prototype.testChartLogarithmic_YAxis = function() {
+  var opts = {
+    rightGap: 0,
+    valueRange: [1, 4],
+    dateWindow: [0, 10],
+    width: 400,
+    height: 400,
+    colors: ['#ff0000'],
+    axes: {
+      x: {
+        drawGrid: false,
+        drawAxis: false
+      },
+      y: {
+        drawGrid: false,
+        drawAxis: false,
+        logscale: true
+      }
+    }
+  }
+
+  var graph = document.getElementById("graph");
+  g = new Dygraph(graph, [ [1,1], [4,4] ], opts);
+
+  var epsilon = 1e-8;
+  assertEqualsDelta([0, 4], g.toDataCoords(0, 0), epsilon);
+  assertEqualsDelta([0, 1], g.toDataCoords(0, 400), epsilon);
+  assertEqualsDelta([10, 4], g.toDataCoords(400, 0), epsilon);
+  assertEqualsDelta([10, 1], g.toDataCoords(400, 400), epsilon);
+  assertEqualsDelta([10, 2], g.toDataCoords(400, 200), epsilon);
+  
+  assertEquals([0, 0], g.toDomCoords(0, 4));
+  assertEquals([0, 400], g.toDomCoords(0, 1));
+  assertEquals([400, 0], g.toDomCoords(10, 4));
+  assertEquals([400, 400], g.toDomCoords(10, 1));
+  assertEquals([400, 200], g.toDomCoords(10, 2));
+}
+
+ToDomCoordsTestCase.prototype.testChartLogarithmic_XAxis = function() {
+  var opts = {
+    rightGap: 0,
+    valueRange: [1, 1000],
+    dateWindow: [1, 1000],
+    width: 400,
+    height: 400,
+    colors: ['#ff0000'],
+    axes: {
+      x: {
+        drawGrid: false,
+        drawAxis: false,
+        logscale: true
+      },
+      y: {
+        drawGrid: false,
+        drawAxis: false
+      }
+    }
+  }
+
+  var graph = document.getElementById("graph");
+  g = new Dygraph(graph, [ [1,1], [10, 10], [100,100], [1000,1000] ], opts);
+
+  var epsilon = 1e-8;
+  assertEqualsDelta(1, g.toDataXCoord(0), epsilon);
+  assertEqualsDelta(5.623413251903489, g.toDataXCoord(100), epsilon);
+  assertEqualsDelta(31.62277660168378, g.toDataXCoord(200), epsilon);
+  assertEqualsDelta(177.8279410038921, g.toDataXCoord(300), epsilon);
+  assertEqualsDelta(1000, g.toDataXCoord(400), epsilon);
+
+  assertEqualsDelta(0, g.toDomXCoord(1), epsilon);
+  assertEqualsDelta(3.6036036036036037, g.toDomXCoord(10), epsilon);
+  assertEqualsDelta(39.63963963963964, g.toDomXCoord(100), epsilon);
+  assertEqualsDelta(400, g.toDomXCoord(1000), epsilon);
+
+  assertEqualsDelta(0, g.toPercentXCoord(1), epsilon);
+  assertEqualsDelta(0.3333333333, g.toPercentXCoord(10), epsilon);
+  assertEqualsDelta(0.6666666666, g.toPercentXCoord(100), epsilon);
+  assertEqualsDelta(1, g.toPercentXCoord(1000), epsilon);
+ 
+  // Now zoom in and ensure that the methods return reasonable values.
+  g.updateOptions({dateWindow: [ 10, 100 ]});
+
+  assertEqualsDelta(10, g.toDataXCoord(0), epsilon);
+  assertEqualsDelta(17.78279410038923, g.toDataXCoord(100), epsilon);
+  assertEqualsDelta(31.62277660168379, g.toDataXCoord(200), epsilon);
+  assertEqualsDelta(56.23413251903491, g.toDataXCoord(300), epsilon);
+  assertEqualsDelta(100, g.toDataXCoord(400), epsilon);
+
+  assertEqualsDelta(-40, g.toDomXCoord(1), epsilon);
+  assertEqualsDelta(0, g.toDomXCoord(10), epsilon);
+  assertEqualsDelta(400, g.toDomXCoord(100), epsilon);
+  assertEqualsDelta(4400, g.toDomXCoord(1000), epsilon);
+
+  assertEqualsDelta(-1, g.toPercentXCoord(1), epsilon);
+  assertEqualsDelta(0, g.toPercentXCoord(10), epsilon);
+  assertEqualsDelta(1, g.toPercentXCoord(100), epsilon);
+  assertEqualsDelta(2, g.toPercentXCoord(1000), epsilon);
+}
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