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Fix cut off tick labels in radial scale (#5848)

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Fix the issue that the topmost tick label and the bottom of the chart area are cut off with a radial scale.
This commit is contained in:
Akihiko Kusanagi 2018-11-28 15:35:15 +08:00 committed by Simon Brunel
parent bbca2fc789
commit d6ac7d8a80
8 changed files with 51 additions and 34 deletions
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35
src/scales/scale.radialLinear.js
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@ -79,6 +79,16 @@ module.exports = function(Chart) {
};
}
function getTickFontSize(scale) {
var opts = scale.options;
var tickOpts = opts.ticks;
if (tickOpts.display && opts.display) {
return helpers.valueOrDefault(tickOpts.fontSize, globalDefaults.defaultFontSize);
}
return 0;
}
function measureLabelSize(ctx, fontSize, label) {
if (helpers.isArray(label)) {
return {
@ -145,6 +155,7 @@ module.exports = function(Chart) {
*/
var plFont = getPointLabelFontOptions(scale);
var paddingTop = getTickFontSize(scale) / 2;
// Get maximum radius of the polygon. Either half the height (minus the text width) or half the width.
// Use this to calculate the offset + change. - Make sure L/R protrusion is at least 0 to stop issues with centre points
@ -194,6 +205,11 @@ module.exports = function(Chart) {
}
}
if (paddingTop && -paddingTop < furthestLimits.t) {
furthestLimits.t = -paddingTop;
furthestAngles.t = 0;
}
scale.setReductions(largestPossibleRadius, furthestLimits, furthestAngles);
}
@ -201,9 +217,10 @@ module.exports = function(Chart) {
* Helper function to fit a radial linear scale with no point labels
*/
function fit(scale) {
var largestPossibleRadius = Math.min(scale.height / 2, scale.width / 2);
scale.drawingArea = Math.round(largestPossibleRadius);
scale.setCenterPoint(0, 0, 0, 0);
var paddingTop = getTickFontSize(scale) / 2;
var largestPossibleRadius = Math.min((scale.height - paddingTop) / 2, scale.width / 2);
scale.drawingArea = Math.floor(largestPossibleRadius);
scale.setCenterPoint(0, 0, paddingTop, 0);
}
function getTextAlignForAngle(angle) {
@ -341,8 +358,8 @@ module.exports = function(Chart) {
// Set the unconstrained dimension before label rotation
me.width = me.maxWidth;
me.height = me.maxHeight;
me.xCenter = Math.round(me.width / 2);
me.yCenter = Math.round(me.height / 2);
me.xCenter = Math.floor(me.width / 2);
me.yCenter = Math.floor(me.height / 2);
var minSize = helpers.min([me.height, me.width]);
var tickFontSize = helpers.valueOrDefault(tickOpts.fontSize, globalDefaults.defaultFontSize);
@ -416,8 +433,8 @@ module.exports = function(Chart) {
radiusReductionBottom = numberOrZero(radiusReductionBottom);
me.drawingArea = Math.min(
Math.round(largestPossibleRadius - (radiusReductionLeft + radiusReductionRight) / 2),
Math.round(largestPossibleRadius - (radiusReductionTop + radiusReductionBottom) / 2));
Math.floor(largestPossibleRadius - (radiusReductionLeft + radiusReductionRight) / 2),
Math.floor(largestPossibleRadius - (radiusReductionTop + radiusReductionBottom) / 2));
me.setCenterPoint(radiusReductionLeft, radiusReductionRight, radiusReductionTop, radiusReductionBottom);
},
setCenterPoint: function(leftMovement, rightMovement, topMovement, bottomMovement) {
@ -427,8 +444,8 @@ module.exports = function(Chart) {
var maxTop = topMovement + me.drawingArea;
var maxBottom = me.height - bottomMovement - me.drawingArea;
me.xCenter = Math.round(((maxLeft + maxRight) / 2) + me.left);
me.yCenter = Math.round(((maxTop + maxBottom) / 2) + me.top);
me.xCenter = Math.floor(((maxLeft + maxRight) / 2) + me.left);
me.yCenter = Math.floor(((maxTop + maxBottom) / 2) + me.top);
},
getIndexAngle: function(index) {

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8
test/specs/controller.doughnut.tests.js
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@ -195,10 +195,10 @@ describe('Chart.controllers.doughnut', function() {
{c: Math.PI / 8, s: Math.PI, e: Math.PI + Math.PI / 8},
{c: 3 * Math.PI / 8, s: Math.PI + Math.PI / 8, e: Math.PI + Math.PI / 2}
].forEach(function(expected, i) {
expect(meta.data[i]._model.x).toBeCloseToPixel(510);
expect(meta.data[i]._model.y).toBeCloseToPixel(510);
expect(meta.data[i]._model.outerRadius).toBeCloseToPixel(509);
expect(meta.data[i]._model.innerRadius).toBeCloseToPixel(381);
expect(meta.data[i]._model.x).toBeCloseToPixel(511);
expect(meta.data[i]._model.y).toBeCloseToPixel(511);
expect(meta.data[i]._model.outerRadius).toBeCloseToPixel(510);
expect(meta.data[i]._model.innerRadius).toBeCloseToPixel(382);
expect(meta.data[i]._model.circumference).toBeCloseTo(expected.c, 8);
expect(meta.data[i]._model.startAngle).toBeCloseTo(expected.s, 8);
expect(meta.data[i]._model.endAngle).toBeCloseTo(expected.e, 8);

16
test/specs/controller.polarArea.tests.js
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@ -99,13 +99,13 @@ describe('Chart.controllers.polarArea', function() {
expect(meta.data.length).toBe(4);
[
{o: 179, s: -0.5 * Math.PI, e: 0},
{o: 243, s: 0, e: 0.5 * Math.PI},
{o: 177, s: -0.5 * Math.PI, e: 0},
{o: 240, s: 0, e: 0.5 * Math.PI},
{o: 51, s: 0.5 * Math.PI, e: Math.PI},
{o: 0, s: Math.PI, e: 1.5 * Math.PI}
].forEach(function(expected, i) {
expect(meta.data[i]._model.x).toBeCloseToPixel(256);
expect(meta.data[i]._model.y).toBeCloseToPixel(256);
expect(meta.data[i]._model.y).toBeCloseToPixel(259);
expect(meta.data[i]._model.innerRadius).toBeCloseToPixel(0);
expect(meta.data[i]._model.outerRadius).toBeCloseToPixel(expected.o);
expect(meta.data[i]._model.startAngle).toBe(expected.s);
@ -141,9 +141,9 @@ describe('Chart.controllers.polarArea', function() {
chart.update();
expect(meta.data[0]._model.x).toBeCloseToPixel(256);
expect(meta.data[0]._model.y).toBeCloseToPixel(256);
expect(meta.data[0]._model.y).toBeCloseToPixel(259);
expect(meta.data[0]._model.innerRadius).toBeCloseToPixel(0);
expect(meta.data[0]._model.outerRadius).toBeCloseToPixel(179);
expect(meta.data[0]._model.outerRadius).toBeCloseToPixel(177);
expect(meta.data[0]._model).toEqual(jasmine.objectContaining({
startAngle: -0.5 * Math.PI,
endAngle: 0,
@ -183,13 +183,13 @@ describe('Chart.controllers.polarArea', function() {
expect(meta.data.length).toBe(4);
[
{o: 179, s: 0, e: 0.5 * Math.PI},
{o: 243, s: 0.5 * Math.PI, e: Math.PI},
{o: 177, s: 0, e: 0.5 * Math.PI},
{o: 240, s: 0.5 * Math.PI, e: Math.PI},
{o: 51, s: Math.PI, e: 1.5 * Math.PI},
{o: 0, s: 1.5 * Math.PI, e: 2.0 * Math.PI}
].forEach(function(expected, i) {
expect(meta.data[i]._model.x).toBeCloseToPixel(256);
expect(meta.data[i]._model.y).toBeCloseToPixel(256);
expect(meta.data[i]._model.y).toBeCloseToPixel(259);
expect(meta.data[i]._model.innerRadius).toBeCloseToPixel(0);
expect(meta.data[i]._model.outerRadius).toBeCloseToPixel(expected.o);
expect(meta.data[i]._model.startAngle).toBe(expected.s);

18
test/specs/controller.radar.tests.js
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@ -154,10 +154,10 @@ describe('Chart.controllers.radar', function() {
meta.controller.update();
[
{x: 256, y: 117, cppx: 246, cppy: 117, cpnx: 272, cpny: 117},
{x: 464, y: 256, cppx: 464, cppy: 248, cpnx: 464, cpny: 262},
{x: 256, y: 256, cppx: 276.9, cppy: 256, cpnx: 250.4, cpny: 256},
{x: 200, y: 256, cppx: 200, cppy: 259, cpnx: 200, cpny: 245},
{x: 256, y: 116, cppx: 246, cppy: 116, cpnx: 273, cpny: 116},
{x: 466, y: 256, cppx: 466, cppy: 248, cpnx: 466, cpny: 262},
{x: 256, y: 256, cppx: 277, cppy: 256, cpnx: 250.4, cpny: 256},
{x: 200, y: 256, cppx: 200, cppy: 260, cpnx: 200, cpny: 246},
].forEach(function(expected, i) {
expect(meta.data[i]._model.x).toBeCloseToPixel(expected.x);
expect(meta.data[i]._model.y).toBeCloseToPixel(expected.y);
@ -211,8 +211,8 @@ describe('Chart.controllers.radar', function() {
// Since tension is now 0, we don't care about the control points
[
{x: 256, y: 117},
{x: 464, y: 256},
{x: 256, y: 116},
{x: 466, y: 256},
{x: 256, y: 256},
{x: 200, y: 256},
].forEach(function(expected, i) {
@ -270,11 +270,11 @@ describe('Chart.controllers.radar', function() {
}));
expect(meta.data[0]._model.x).toBeCloseToPixel(256);
expect(meta.data[0]._model.y).toBeCloseToPixel(117);
expect(meta.data[0]._model.y).toBeCloseToPixel(116);
expect(meta.data[0]._model.controlPointPreviousX).toBeCloseToPixel(241);
expect(meta.data[0]._model.controlPointPreviousY).toBeCloseToPixel(117);
expect(meta.data[0]._model.controlPointPreviousY).toBeCloseToPixel(116);
expect(meta.data[0]._model.controlPointNextX).toBeCloseToPixel(281);
expect(meta.data[0]._model.controlPointNextY).toBeCloseToPixel(117);
expect(meta.data[0]._model.controlPointNextY).toBeCloseToPixel(116);
expect(meta.data[0]._model).toEqual(jasmine.objectContaining({
radius: 2.2,
backgroundColor: 'rgb(0, 1, 3)',

8
test/specs/scale.radialLinear.tests.js
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@ -349,9 +349,9 @@ describe('Test the radial linear scale', function() {
}
});
expect(chart.scale.drawingArea).toBe(233);
expect(chart.scale.drawingArea).toBe(232);
expect(chart.scale.xCenter).toBe(256);
expect(chart.scale.yCenter).toBe(280);
expect(chart.scale.yCenter).toBe(279);
});
it('should correctly get the label for a given data index', function() {
@ -397,7 +397,7 @@ describe('Test the radial linear scale', function() {
});
expect(chart.scale.getDistanceFromCenterForValue(chart.scale.min)).toBe(0);
expect(chart.scale.getDistanceFromCenterForValue(chart.scale.max)).toBe(233);
expect(chart.scale.getDistanceFromCenterForValue(chart.scale.max)).toBe(232);
expect(chart.scale.getPointPositionForValue(1, 5)).toEqual({
x: 270,
y: 275,
@ -406,7 +406,7 @@ describe('Test the radial linear scale', function() {
chart.scale.options.ticks.reverse = true;
chart.update();
expect(chart.scale.getDistanceFromCenterForValue(chart.scale.min)).toBe(233);
expect(chart.scale.getDistanceFromCenterForValue(chart.scale.min)).toBe(232);
expect(chart.scale.getDistanceFromCenterForValue(chart.scale.max)).toBe(0);
});