这篇文章主要介绍“GoJs中的动画怎么使用”的相关知识，小编通过实际案例向大家展示操作过程，操作方法简单快捷，实用性强，希望这篇“GoJs中的动画怎么使用”文章能帮助大家解决问题。

GoJs动画的使用

在

gojs

Diagram

AnimationManager

Animation

AnimationTrigger

使用默认的动画

默认的动画包括

Default

AnimateLocations

//data
nodes:[
{ key: "1", color: "#99FFFF",text:"三国",figure:"Rectangle" },
{ key: "1-1", color: "#FF0000",text:"魏",figure:"Circle" },
{ key: "1-2", color: "#FFFF66",text:"蜀",figure:"Circle"},
{ key: "1-3", color: "#0000FF",text:"吴",figure:"Circle" },
],
links:[
{
  from:"1",
  to:"1-1"
},
{
  from:"1",
  to:"1-2"
},
{
  from:"1",
  to:"1-3"
},
]
//methods
Default(){
    this.myDiagram.animationManager.initialAnimationStyle = go.AnimationManager.Default;
    this.myDiagram.model = go.Model.fromJSON(this.myDiagram.model.toJSON());
},
AnimateLocations(){
    this.myDiagram.animationManager.initialAnimationStyle = go.AnimationManager.AnimateLocations;
    this.myDiagram.model = go.Model.fromJSON(this.myDiagram.model.toJSON());
},

默认动画只需要修改

animationManager.initialAnimationStyle

通过AnimationTrigger修改属性动画

this.myDiagram.nodeTemplate =
    $$(go.Node, "Vertical",
    { selectionAdorned: false,selectionChanged: this.onSelectionChanged }, 
    $$(go.Shape, "Circle",
        { width: 30, height: 30,name:"ICON" },
        new go.AnimationTrigger('stroke'),
        new go.AnimationTrigger('fill'),
        new go.Binding("figure", "figure"),
      ),
    $$(go.TextBlock, 
        new go.Binding("text", "text")),
   );
   this.myDiagram.model = new go.GraphLinksModel(this.nodes, this.links);
},
animateTrigger(){
    this.myDiagram.commit(function(diag) {
        diag.nodes.each(function(node){
            node.elt(0).stroke = go.Brush.randomColor();
            node.elt(0).fill = go.Brush.randomColor();
        })
    });
}

如果给节点的绘图属性进行修改的过程中添加动画的话，则需要在属性的配置下面通过

new go.AnimationTrigger

animateTrigger

删除节点的动画

在节点的删除过程中可以添加一个动画，但是节点删除之后画布中就不存在节点了。因此在删除的时候需要拷贝一下节点的信息，对拷贝的节点对象通过

Animation.add

SelectionDeleting

this.myDiagram.addDiagramListener('SelectionDeleting', function(e) {
    e.subject.each(function(part) {
        if (!(part instanceof go.Node)) return;
        let animation = new go.Animation();
        let deletePart = part.copy();
        animation.add(deletePart, "scale", deletePart.scale, 0.01);
        animation.add(deletePart, "angle", deletePart.angle, 360);
        animation.addTemporaryPart(deletePart, myDiagram);
        animation.start();
    });
});

提示性的回弹动画

在很多场景中需要对操作过程有一个反馈，因此提供了一些提示性的回弹动画，比如缩小之后恢复原样，放大之后恢复原样的过程。代码示例如下

//Html
<button @click="angle">angle</button>
<button @click="position">position</button>
<button @click="zoomOut">zoomOut</button>
<button @click="zoomIn">zoomIn</button>
//methods
angle(){
    this.myDiagram.animationManager.stopAnimation(true);
    let animation = new go.Animation();
    this.myDiagram.nodes.each(function(node) {
        animation.add(node, "angle", node.angle, Math.random() * 90);
    });
    animation.start(); 
},
position(){
        this.myDiagram.animationManager.stopAnimation(true);
        let animation = new go.Animation();
        animation.reversible = true; 
        animation.add(this.myDiagram, "position", this.myDiagram.position, this.myDiagram.position.copy().offset(200, 15));
        animation.duration = 700;
        animation.start(); 
},
zoomOut(){
        this.myDiagram.animationManager.stopAnimation(true);
        let animation = new go.Animation();
        animation.reversible = true; 
        animation.add(this.myDiagram, "scale", this.myDiagram.scale, 0.2);
        animation.start(); 
},
zoomIn(){
        this.myDiagram.animationManager.stopAnimation(true);
        let animation = new go.Animation();
        animation.reversible = true; 
        animation.add(this.myDiagram, "scale", this.myDiagram.scale, 4);
        animation.start(); 
}

通过创建动画实例，然后通过

animation.add

angle、position、scale

animationManager.stopAnimation

zoomOut