Svgjs使用手册.docx
- 文档编号:2259172
- 上传时间:2022-10-28
- 格式:DOCX
- 页数:25
- 大小:30.55KB
Svgjs使用手册.docx
《Svgjs使用手册.docx》由会员分享,可在线阅读,更多相关《Svgjs使用手册.docx(25页珍藏版)》请在冰豆网上搜索。
Svgjs使用手册
Svg.js使用手册
简介:
SVG.js是一个轻量级的JavaScript库,允许你轻松操作SVG和定义动画。
SVG(ScalableVectorGraphics,可缩放矢量图形)是基于XML、用于描述二维矢量图形的一种图形格式。
SVG由W3C制定,是一个开放标准。
SVG.js中包含了大量用于定义动画的方法,如移动、缩放、旋转、倾斜等,具体可参阅相关演示。
SVG.js中的一些亮点:
∙易读的简洁的语法
∙非常轻量,gzip压缩版只有5k
∙针对大小、位置、颜色等的动画元素
∙模块化结构,轻松扩展
∙各种实用插件
∙各种形状类型间拥有统一的API.
∙元素可以绑定事件,包括触摸事件
∙完全支持不透明蒙版
∙元素组
∙动态渐变
∙填充模式
∙完整的文档记录
使用说明:
CreateaSVGdocument
Usethe SVG() functiontocreateaSVGdocumentwithinagivenhtmlelement:
vardraw=SVG('canvas').size(300,300)
varrect=draw.rect(100,100).attr({fill:
'#f06'})
Thefirstargumentcaneitherbeanidoftheelementortheselectedelementitself.Thiswillgeneratethefollowingoutput:
//www.w3.org/2000/svg"version="1.1"xmlns: xlink="http: //www.w3.org/1999/xlink"width="300"height="300">
Bydefaultthesvgcanvasfollowsthedimensionsofitsparent,inthiscase #canvas:
vardraw=SVG('canvas').size('100%','100%')
CheckingforSVGsupport
Bydefaultthislibraryassumestheclient'sbrowsersupportsSVG.Youcantestsupportasfollows:
if(SVG.supported){
vardraw=SVG('canvas')
varrect=draw.rect(100,100)
}else{
alert('SVGnotsupported')
}
ViewBox
The viewBox attributeofan
draw.viewbox(0,0,297,210)
Alternativelyyoucanalsosupplyanobjectasthefirstargument:
draw.viewbox({x:
0,y:
0,width:
297,height:
210})
Withoutanyargumentsaninstanceof SVG.ViewBox willbereturned:
varbox=draw.viewbox()
Butthebestthingaboutthe viewbox() methodisthatyoucangetthezoomoftheviewbox:
varbox=draw.viewbox()
varzoom=box.zoom
Ifthesizeoftheviewboxequalsthesizeofthesvgcanvas,thezoomvaluewillbe1.
Nestedsvg
Withthisfeatureyoucannestsvgdocumentswithineachother.Nestedsvgdocumentshaveexactlythesamefeaturesasthemain,top-levelsvgdocument:
varnested=draw.nested()
varrect=nested.rect(200,200)
Thisfunctionalityrequiresthenested.jsmodulewhichisincludedinthedefaultdistribution.
SVGdocument
Svg.jsalsoworksoutsideoftheHTMLDOM,insideanSVGdocumentforexample:
xmlversion="1.0"encoding="utf-8"?
>
//www.w3.org/2000/svg"xmlns: xlink="http: //www.w3.org/1999/xlink"version="1.1"> href="svg.min.js"> [CDATA[ vardraw=SVG('viewport') draw.rect(100,100).animate().fill('#f03').move(100,100) ]]> Elements Rect Rectshavetwoarguments,their width and height: varrect=draw.rect(100,100) Ellipse Ellipses,likerects,havetwoarguments,their width and height: varellipse=draw.ellipse(200,100) Circle Theonlyargumentnecessaryforacircleisthediameter: varcircle=draw.circle(100) Notethatthisgeneratesan Line Thelineelementalwaystakesfourarguments, x1, y1, x2 and y2: varline=draw.line(0,0,100,150).stroke({width: 1}) Polyline Thepolylineelementdefinesasetofconnectedstraightlinesegments.Typically,polylineelementsdefineopenshapes: //polyline('x,yx,yx,y') varpolyline=draw.polyline('0,0100,5050,100').fill('none').stroke({width: 1}) Polylinestringsconsistofalistofpointsseparatedbyspaces: x,yx,yx,y. Asanalternativeanarrayofpointswillworkaswell: //polyline([[x,y],[x,y],[x,y]]) varpolyline=draw.polyline([[0,0],[100,50],[50,100]]).fill('none').stroke({width: 1}) Polylinescanbeupdatedusingthe plot() method: polyline.plot([[0,0],[100,50],[50,100],[150,50],[200,50]]) The plot() methodcanalsobeanimated: polyline.animate(3000).plot([[0,0],[100,50],[50,100],[150,50],[200,50],[250,100],[300,50],[350,50]]) Polygon Thepolygonelement,unlikethepolylineelement,definesaclosedshapeconsistingofasetofconnectedstraightlinesegments: //polygon('x,yx,yx,y') varpolygon=draw.polygon('0,0100,5050,100').fill('none').stroke({width: 1}) Polygonstringsareexactlythesameaspolylinestrings.Thereisnoneedtoclosetheshapeasthefirstandlastpointwillbeconnectedautomatically. Path Thepathstringissimilartothepolygonstringbutmuchmorecomplexinordertosupportcurves: //path('pathdata') varpath=draw.path('M10,20L30,40') Formoredetailsonpathdatastrings,pleaserefertotheSVGdocumentation: http: //www.w3.org/TR/SVG/paths.html#PathData Notethatpathswillalwaysbepositionedatx=0,y=0oncreation.Thisistomaketheunified move() apipossible.Svg.jsassumesyouarecreatingapathtomoveitafterwards.Ifyouneedtoconstantl
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- Svgjs 使用手册