@antv/g2
Version:
the Grammar of Graphics in Javascript
136 lines • 5.74 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.sectorPathUpdate = exports.getArcInfo = void 0;
var tslib_1 = require("tslib");
var g_canvas_1 = require("@antv/g-canvas");
var util_1 = require("@antv/util");
var graphics_1 = require("../../util/graphics");
function getAngle(startPoint, arcPath) {
var _a;
var _b = (0, g_canvas_1.getArcParams)(startPoint, arcPath), startAngle = _b.startAngle, endAngle = _b.endAngle, arcFlag = _b.arcFlag;
if (!(0, util_1.isNumberEqual)(startAngle, -Math.PI * 0.5) && startAngle < -Math.PI * 0.5) {
startAngle += Math.PI * 2;
}
if (!(0, util_1.isNumberEqual)(endAngle, -Math.PI * 0.5) && endAngle < -Math.PI * 0.5) {
endAngle += Math.PI * 2;
}
if (arcPath[5] === 0) {
// 逆时针，需要将 startAngle 和 endAngle 转置，因为 G2 极坐标系为顺时针方向
_a = tslib_1.__read([endAngle, startAngle], 2), startAngle = _a[0], endAngle = _a[1];
}
if ((0, util_1.isNumberEqual)(startAngle, Math.PI * 1.5)) {
startAngle = Math.PI * -0.5;
}
if ((0, util_1.isNumberEqual)(endAngle, Math.PI * -0.5) && arcFlag) {
endAngle = Math.PI * 1.5;
}
return {
startAngle: startAngle,
endAngle: endAngle,
};
}
function getArcStartPoint(path) {
var startPoint;
if (path[0] === 'M' || path[0] === 'L') {
startPoint = [path[1], path[2]];
}
else if (path[0] === 'a' || path[0] === 'A' || path[0] === 'C') {
startPoint = [path[path.length - 2], path[path.length - 1]];
}
return startPoint;
}
/**
* path 存在以下情况
* 1. 饼图不为整圆的 path，命令为 M, L, A, L, Z
* 2. 饼图为整圆的 path，命令为 M, M, A, A, M, Z
* 3. 环图不为整圆的 path，命令为 M, A, L, A, L, Z
* 4. 环图为整圆的 path，命令为 M, A, A, M, A, A, M, Z
* 5. radial-line, 不为整圆时的 path, 命令为 M, A, A, Z
* 6. radial-line, 为整圆时的 path，命令为 M, A, A, A, A, Z
* @param path theta 坐标系下圆弧的 path 命令
*/
function getArcInfo(path) {
var _a;
var startAngle;
var endAngle;
var arcPaths = path.filter(function (command) {
return command[0] === 'A' || command[0] === 'a';
});
if (arcPaths.length === 0) {
return {
startAngle: 0,
endAngle: 0,
radius: 0,
innerRadius: 0,
};
}
var firstArcPathCommand = arcPaths[0];
var lastArcPathCommand = arcPaths.length > 1 ? arcPaths[1] : arcPaths[0];
var firstIndex = path.indexOf(firstArcPathCommand);
var lastIndex = path.indexOf(lastArcPathCommand);
var firstStartPoint = getArcStartPoint(path[firstIndex - 1]);
var lastStartPoint = getArcStartPoint(path[lastIndex - 1]);
var _b = getAngle(firstStartPoint, firstArcPathCommand), firstStartAngle = _b.startAngle, firstEndAngle = _b.endAngle;
var _c = getAngle(lastStartPoint, lastArcPathCommand), lastStartAngle = _c.startAngle, lastEndAngle = _c.endAngle;
if ((0, util_1.isNumberEqual)(firstStartAngle, lastStartAngle) && (0, util_1.isNumberEqual)(firstEndAngle, lastEndAngle)) {
startAngle = firstStartAngle;
endAngle = firstEndAngle;
}
else {
startAngle = Math.min(firstStartAngle, lastStartAngle);
endAngle = Math.max(firstEndAngle, lastEndAngle);
}
var radius = firstArcPathCommand[1];
var innerRadius = arcPaths[arcPaths.length - 1][1];
if (radius < innerRadius) {
_a = tslib_1.__read([innerRadius, radius], 2), radius = _a[0], innerRadius = _a[1];
}
else if (radius === innerRadius) {
innerRadius = 0;
}
return {
startAngle: startAngle,
endAngle: endAngle,
radius: radius,
innerRadius: innerRadius,
};
}
exports.getArcInfo = getArcInfo;
/**
* @ignore
* 饼图更新动画
* @param shape 文本图形
* @param animateCfg
* @param cfg
*/
function sectorPathUpdate(shape, animateCfg, cfg) {
var toAttrs = cfg.toAttrs, coordinate = cfg.coordinate;
var path = toAttrs.path || [];
var pathCommands = path.map(function (command) { return command[0]; });
if (path.length < 1)
return;
var _a = getArcInfo(path), curStartAngle = _a.startAngle, curEndAngle = _a.endAngle, radius = _a.radius, innerRadius = _a.innerRadius;
var _b = getArcInfo(shape.attr('path')), preStartAngle = _b.startAngle, preEndAngle = _b.endAngle;
var center = coordinate.getCenter();
var diffStartAngle = curStartAngle - preStartAngle;
var diffEndAngle = curEndAngle - preEndAngle;
// 没有 diff 时直接返回最终 attrs，不需要额外动画
if (diffStartAngle === 0 && diffEndAngle === 0) {
shape.attr('path', path);
return;
}
shape.animate(function (ratio) {
var onFrameStartAngle = preStartAngle + ratio * diffStartAngle;
var onFrameEndAngle = preEndAngle + ratio * diffEndAngle;
return tslib_1.__assign(tslib_1.__assign({}, toAttrs), { path:
// hack, 兼容 /examples/bar/basic/demo/radial-line.ts 动画
(0, util_1.isEqual)(pathCommands, ['M', 'A', 'A', 'Z'])
? (0, graphics_1.getArcPath)(center.x, center.y, radius, onFrameStartAngle, onFrameEndAngle)
: (0, graphics_1.getSectorPath)(center.x, center.y, radius, onFrameStartAngle, onFrameEndAngle, innerRadius) });
}, tslib_1.__assign(tslib_1.__assign({}, animateCfg), { callback: function () {
// 将 path 保持原始态，否则会影响 setState() 的动画
shape.attr('path', path);
} }));
}
exports.sectorPathUpdate = sectorPathUpdate;
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