Angular.js在指令中更新SVG模板

时间:2013-12-10 20:22:21

标签: javascript angularjs svg angularjs-directive angularjs-ng-repeat

不久之前,我问过“Angular.js rendering SVG templates in directives”,我用SVG节点替换渲染模板时角度所产生的DOM节点。我得到了一个响应它,但我意识到我丢失了所有的数据绑定。

请参阅Plunkr(点击更新):http://plnkr.co/edit/HjOpqc?p=preview

如何用SVG节点替换这些DOM节点,并保持角度绑定完整?我尝试使用$ compile使它工作(因为我已经完成了常规的html),但它只是不起作用。

代码:

var svgNS = 'http://www.w3.org/2000/svg';
app.directive('path', ngSvg('path'));
app.directive('g', ngSvg('g'));

function ngSvg(type) {
  return function($timeout, $compile) {
    return {
      restrict: 'E',
      link: function(scope, el, attr) {
        //skip nodes if they are already svg
        if (el[0].namespaceURI === svgNS) {
          return;
        }

        // I would expect the chunk of code below to work,
        // but it does not with ng-repeat

        // var newAttr = {};
        // _.each(el[0].attributes, function(at) {
        //   newAttr[at.nodeName] = at.value;
        // });

        // var path = makeNode(type, el, newAttr);
        // var parent = path.cloneNode(true);

        // $compile(parent)(scope);

        // var children = el.children();
        // $(parent).append(children);

        // $timeout(function() {
        //   el.replaceWith(parent);
        // })


        // this works for rendering, but does not update the svg elements
        // when update is clicked
        $timeout(function() {
          var newAttr = {};
          _.each(el[0].attributes, function(at) {
            newAttr[at.nodeName] = at.value;
          });

          var path = makeNode(type, el, newAttr);
          var parent = path.cloneNode(true);


          var children = el.children();
          $(parent).append(children);
          el.replaceWith(parent);
        });
      }
    }
  }
}

/* Create a shape node with the given settings. */
function makeNode(name, element, settings) {
  // var ns = 'http://www.w3.org/2000/svg';
  var node = document.createElementNS(svgNS, name);
  for (var attribute in settings) {
    var value = settings[attribute];
    if (value !== null && value !== null && !attribute.match(/\$/) &&
      (typeof value !== 'string' || value !== '')) {
      node.setAttribute(attribute, value);
    }
  }
  return node;
}

1 个答案:

答案 0 :(得分:0)

此问题在Angular 1.3中得到解决,这里是一些自定义svg指令的实现,其中包含您期望从Angular指令获得的行为。现在对指令声明有一个特殊要求,如下templateNamespace: 'svg'

另请注意,我正在覆盖某些保留属性,例如,xheight<rect/>相关。要保留对这些内容的更多控制权,您可以使用ng-attr '<rect ng-attr-width="{{ ngWidth }}" />

JSFiddle Link

以下是自定义<rect/><circle/>

app.directive('ngRect', [function () {
    return {
        templateNamespace: 'svg',
        replace: true,
        template: '<rect ng-attr-width="{{ ngWidth }}" ng-attr-height="{{ ngHeight }}" ng-attr-x="{{ ngX }}" ng-attr-y="{{ ngY }}" ng-click="ngRectClick()"/>',
        scope: {
            'ngHeight': '=',
            'ngWidth': '='
        },
        link: function (scope, elem, attrs) {
            scope.ngRectClick = function() {
                console.log(elem);
            }
        }
    }
}]);

app.directive('ngCircle', [function () {
    return {
        templateNamespace: 'svg',
        replace: true,
        template: '<circle ng-attr-cx="{{ ngCx }}" ng-attr-cy="{{ ngCy }}" ng-attr-r="{{ ngR }}" ng-attr-fill="{{ ngFill }}" ng-click="ngCircleClick()"/>',
        scope: {
            'ngCx': '=',
            'ngCy': '=',
            'ngR': '=',
            'ngFill': '='
        },
        link: function (scope, elem, attrs) {
            scope.ngCircleClick = function() {
                console.log(elem);
            }
        }
    }
}]);