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META-INF.assets.rjzjh.zrender.graphic.Style.js Maven / Gradle / Ivy
/**
* @module zrender/graphic/Style
*/
define(function (require) {
var STYLE_COMMON_PROPS = [
['shadowBlur', 0], ['shadowOffsetX', 0], ['shadowOffsetY', 0], ['shadowColor', '#000'],
['lineCap', 'butt'], ['lineJoin', 'miter'], ['miterLimit', 10]
];
// var SHADOW_PROPS = STYLE_COMMON_PROPS.slice(0, 4);
// var LINE_PROPS = STYLE_COMMON_PROPS.slice(4);
var Style = function (opts) {
this.extendFrom(opts);
};
Style.prototype = {
constructor: Style,
/**
* @type {string}
*/
fill: '#000000',
/**
* @type {string}
*/
stroke: null,
/**
* @type {number}
*/
opacity: 1,
/**
* @type {Array.}
*/
lineDash: null,
/**
* @type {number}
*/
lineDashOffset: 0,
/**
* @type {number}
*/
shadowBlur: 0,
/**
* @type {number}
*/
shadowOffsetX: 0,
/**
* @type {number}
*/
shadowOffsetY: 0,
/**
* @type {number}
*/
lineWidth: 1,
/**
* If stroke ignore scale
* @type {Boolean}
*/
strokeNoScale: false,
// Bounding rect text configuration
// Not affected by element transform
/**
* @type {string}
*/
text: null,
/**
* @type {string}
*/
textFill: '#000',
/**
* @type {string}
*/
textStroke: null,
/**
* 'inside', 'left', 'right', 'top', 'bottom'
* [x, y]
* @type {string|Array.}
* @default 'inside'
*/
textPosition: 'inside',
/**
* @type {string}
*/
textBaseline: null,
/**
* @type {string}
*/
textAlign: null,
/**
* @type {string}
*/
textVerticalAlign: null,
/**
* @type {number}
*/
textDistance: 5,
/**
* @type {number}
*/
textShadowBlur: 0,
/**
* @type {number}
*/
textShadowOffsetX: 0,
/**
* @type {number}
*/
textShadowOffsetY: 0,
/**
* @param {CanvasRenderingContext2D} ctx
*/
bind: function (ctx, el, prevEl) {
var style = this;
var prevStyle = prevEl && prevEl.style;
var firstDraw = !prevStyle;
for (var i = 0; i < STYLE_COMMON_PROPS.length; i++) {
var prop = STYLE_COMMON_PROPS[i];
var styleName = prop[0];
if (firstDraw || style[styleName] !== prevStyle[styleName]) {
ctx[styleName] = style[styleName] || prop[1];
}
}
if ((firstDraw || style.fill !== prevStyle.fill)) {
ctx.fillStyle = style.fill;
}
if ((firstDraw || style.stroke !== prevStyle.stroke)) {
ctx.strokeStyle = style.stroke;
}
if ((firstDraw || style.opacity !== prevStyle.opacity)) {
ctx.globalAlpha = style.opacity == null ? 1 : style.opacity;
}
if (this.hasStroke()) {
var lineWidth = style.lineWidth;
ctx.lineWidth = lineWidth / (
(this.strokeNoScale && el && el.getLineScale) ? el.getLineScale() : 1
);
}
},
hasFill: function () {
var fill = this.fill;
return fill != null && fill !== 'none';
},
hasStroke: function () {
var stroke = this.stroke;
return stroke != null && stroke !== 'none' && this.lineWidth > 0;
},
/**
* Extend from other style
* @param {zrender/graphic/Style} otherStyle
* @param {boolean} overwrite
*/
extendFrom: function (otherStyle, overwrite) {
if (otherStyle) {
var target = this;
for (var name in otherStyle) {
if (otherStyle.hasOwnProperty(name)
&& (overwrite || ! target.hasOwnProperty(name))
) {
target[name] = otherStyle[name];
}
}
}
},
/**
* Batch setting style with a given object
* @param {Object|string} obj
* @param {*} [obj]
*/
set: function (obj, value) {
if (typeof obj === 'string') {
this[obj] = value;
}
else {
this.extendFrom(obj, true);
}
},
/**
* Clone
* @return {zrender/graphic/Style} [description]
*/
clone: function () {
var newStyle = new this.constructor();
newStyle.extendFrom(this, true);
return newStyle;
},
createLinearGradient: function (ctx, obj, rect) {
// var size =
var x = obj.x * rect.width + rect.x;
var x2 = obj.x2 * rect.width + rect.x;
var y = obj.y * rect.height + rect.y;
var y2 = obj.y2 * rect.height + rect.y;
var canvasGradient = ctx.createLinearGradient(x, y, x2, y2);
return canvasGradient;
},
createRadialGradient: function (ctx, obj, rect) {
var width = rect.width;
var height = rect.height;
var min = Math.min(width, height);
var x = obj.x * width + rect.x;
var y = obj.y * height + rect.y;
var r = obj.r * min;
var canvasGradient = ctx.createRadialGradient(x, y, 0, x, y, r);
return canvasGradient;
},
getGradient: function (ctx, obj, rect) {
var method = obj.type === 'radial' ? 'createRadialGradient' : 'createLinearGradient';
var canvasGradient = this[method](ctx, obj, rect);
var colorStops = obj.colorStops;
for (var i = 0; i < colorStops.length; i++) {
canvasGradient.addColorStop(
colorStops[i].offset, colorStops[i].color
);
}
return canvasGradient;
}
};
var styleProto = Style.prototype;
for (var i = 0; i < STYLE_COMMON_PROPS.length; i++) {
var prop = STYLE_COMMON_PROPS[i];
if (!(prop[0] in styleProto)) {
styleProto[prop[0]] = prop[1];
}
}
return Style;
});
