如何给JointJS元素一个删除工具? [英] How to give JointJS elements a remove tool?
问题描述
是有一个简单的方法可以让用户删除用户界面中的元素?
在我的项目中,我定义了一个自定义形状 - toolElement
- 封装了此行为,然后根据需要将其扩展为其他自定义形状。
完整披露:
这是一个jsfiddle显示它的工作原理: http://jsfiddle.net/kj4bqczd/3/ $ b $ toolElement
定义如下:
pre $ joint.shapes.tm.toolElement = joint.shapes.basic.Generic.extend({
toolMarkup:['< g class =element-工具>',
'& lt; g class =element-tool-remove>< circle fill =redr =11/>',
'< path transform =scale(.8)translate -16,-16)d =M24.778,21.419 19.276,15.917 24.777,10.415 21.949,7.585 16.447,13.087 10.945,7.585 8.117,10.415 13.618,15.917 8.116,21.419 10.946,24.248 16.447,18.746 21.948,24.248z />',
'< title>从模型< / title>',
'< / g>',
'< / g>' .join(''),
默认值:joint.util.deepSupplement({
attrs:{
text:{'font-weight':400,'font-size ':'small',fill:'black','text-anchor':'middle','ref-x':.5,'ref-y':.5,'y-alignment':'middle'} ,
},
},joint.shapes.basic.Generic.prototype.defaults)
});
如果您需要其他工具以及删除按钮,则可以添加更多标记。
删除行为封装在自定义视图中:
joint.shapes.tm .ToolElementView = joint.dia.ElementView.extend({
initialize:function(){
joint.dia.ElementView.prototype.initialize.apply(this,arguments) ;
},
render:function(){
joint.dia.ElementView.prototype.render.apply(this,arguments);
this.renderTools();
this.update();
return this;
},
renderTools:function() {
var toolMarkup = this.model.toolMarkup || this.model.get('toolMarkup');
if(toolMarkup){
var nodes = V(toolMarkup);
V(this.el).append(nodes);
}
return this;
} ,
指针lick:function(evt,x,y){
this._dx = x;
this._dy = y;
this._action ='';
var className = evt.target.parentNode.getAttribute('class');
switch(className){
case'element-tool-remove':
this.model.remove();
return;
休息;
默认值:
}
joint.dia.CellView.prototype.pointerclick.apply(this,arguments);
},
});
然后,您可以扩展这些来制作自定义形状。在我的项目中,我正在做数据流图,这里是 Process
形状的定义:
joint.shapes.tm.Process = joint.shapes.tm.toolElement.extend({
markup:'< g class =rotating>< g class =scalable>< circle class =element-process/>< title class =tooltip/>< / g>< text />< / g>',
默认值:joint.util.deepSupplement({
类型:'tm.Process',
attrs:{$ b $'.element-process':{'stroke- width':1,r:30,stroke:'black',transform:'translate(30,30)'},
text:{ref:'.element-process'}
},
size:{width:100,height:100}
},joint.shapes.tm.toolElement.prototype.defaults)
});
and view:
joint.shapes.tm.ProcessView = joint.shapes.tm.ToolElementView;
显示并隐藏工具标记,具体取决于元素是否使用CSS高亮显示。如果你喜欢,你可以在悬停时做同样的事情(如链接):
.element .element-tools {
display:none;
cursor:pointer
}
.element.highlighted .element-tools {
display:inline;
}
渲染时,看起来像这样(注意:在我的例子中,另一个按钮在工具中,而不仅仅是删除 - 这就是绿色的人字形按钮。我从上面的代码示例中删除了它,以使它们更简单):
当元素没有突出显示:
突出显示时:
然后,我可以通过扩展toolElement来轻松定义其他形状。以下是数据存储的数据流图形:
和外部角色:
In JointJS, links come with a handy responsive tool for removing links (when you hover over the link, an "x" appears, and clicking it removes the link). Elements, on the other hand, have a remove() method in the API, but don't have the UI "x" to expose that method to users.
Is there a straightforward way to give users the ability to delete elements in the UI?
In my project I define a custom shape - toolElement
- that encapsulates this behaviour and then extend this with other custom shapes as required.
Full disclosure: This technique leans heavily on the jointjs code for links - I just adapted it :o)
Here is a jsfiddle showing it working:
http://jsfiddle.net/kj4bqczd/3/
The toolElement
is defined like this:
joint.shapes.tm.toolElement = joint.shapes.basic.Generic.extend({
toolMarkup: ['<g class="element-tools">',
'<g class="element-tool-remove"><circle fill="red" r="11"/>',
'<path transform="scale(.8) translate(-16, -16)" d="M24.778,21.419 19.276,15.917 24.777,10.415 21.949,7.585 16.447,13.087 10.945,7.585 8.117,10.415 13.618,15.917 8.116,21.419 10.946,24.248 16.447,18.746 21.948,24.248z"/>',
'<title>Remove this element from the model</title>',
'</g>',
'</g>'].join(''),
defaults: joint.util.deepSupplement({
attrs: {
text: { 'font-weight': 400, 'font-size': 'small', fill: 'black', 'text-anchor': 'middle', 'ref-x': .5, 'ref-y': .5, 'y-alignment': 'middle' },
},
}, joint.shapes.basic.Generic.prototype.defaults)
});
You can add more markup if you need other tools as well as the remove button.
The remove behaviour is encapsulated in a custom view:
joint.shapes.tm.ToolElementView = joint.dia.ElementView.extend({
initialize: function() {
joint.dia.ElementView.prototype.initialize.apply(this, arguments);
},
render: function () {
joint.dia.ElementView.prototype.render.apply(this, arguments);
this.renderTools();
this.update();
return this;
},
renderTools: function () {
var toolMarkup = this.model.toolMarkup || this.model.get('toolMarkup');
if (toolMarkup) {
var nodes = V(toolMarkup);
V(this.el).append(nodes);
}
return this;
},
pointerclick: function (evt, x, y) {
this._dx = x;
this._dy = y;
this._action = '';
var className = evt.target.parentNode.getAttribute('class');
switch (className) {
case 'element-tool-remove':
this.model.remove();
return;
break;
default:
}
joint.dia.CellView.prototype.pointerclick.apply(this, arguments);
},
});
You can then extend these to make your custom shapes. In my project, I am doing data flow diagrams and here is the definition of the Process
shape:
joint.shapes.tm.Process = joint.shapes.tm.toolElement.extend({
markup: '<g class="rotatable"><g class="scalable"><circle class="element-process"/><title class="tooltip"/></g><text/></g>',
defaults: joint.util.deepSupplement({
type: 'tm.Process',
attrs: {
'.element-process': { 'stroke-width': 1, r: 30, stroke: 'black', transform: 'translate(30, 30)' },
text: { ref: '.element-process'}
},
size: { width: 100, height: 100 }
}, joint.shapes.tm.toolElement.prototype.defaults)
});
and view:
joint.shapes.tm.ProcessView = joint.shapes.tm.ToolElementView;
I show and hide the tool markup, depending whether the element is highlighted using CSS. You could do the same when hovering (like the links do) if you like:
.element .element-tools {
display: none;
cursor: pointer
}
.element.highlighted .element-tools {
display: inline;
}
When rendered, it looks like this (note: in my case, I have another button in the tools, not just the remove - that is what the green chevron button is. I removed this from the code samples above to make them simpler):
When the element is not highlighted:
When it is highlighted:
I can then define other shapes really easily by extending toolElement. Here are the data flow diagram shapes for data stores:
and external actors:
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