Question

方案

我在我的骨干应用中的视图包含多个boxes(which are div elements)。当用户单击一个框并按住鼠标按钮500毫秒时，我想在左上角显示一个delete按钮。当用户点击其他任何地方#wrapper时，该delete按钮应隐藏。

问题

因此显示delete按钮不是问题。它确实显示删除按钮，当我点击并按住一秒钟它显示删除按钮半秒然后隐藏。它隐藏是因为我还将click事件添加到其父元素#wrapper，它实际上隐藏了此删除按钮。

问题

那么当我点击并按住子元素#wrapper时，如何阻止父元素box触发点击事件？

这是我的代码

以下是父元素模块的代码

var Boxes = Backbone.View.extend({
    el: '#wrapper',

    events: {
        'click': 'method' //when clicked on wrapper i.e. parent of box trigger method function
    },

    render: function (PaintBoxModel) {
        var paintBoxView = new PaintBoxView({ model: PaintBoxModel });
        this.$el.find('#contents').append(paintBoxView.render().el);
        return this;
    },

    method: function () {
        console.log('method');
        App.Vent.trigger('bodyclicked'); //trigger an event
    }

});

这是子元素的模块

var Box = Backbone.View.extend({
    events: {
        'mousedown': 'mouseHoldDown',
        'mouseup': 'removeMouseHoldDown'
    },

    initialize: function () {
        this.timeoutId = 0;
        App.Vent.on('bodyclicked', this.removeDeleteBtnShadow.bind(this)); //here I am listening to the click event when parent `#wrapper` is clicked
    },

    mouseHoldDown: function () {
        this.timeoutId = setTimeout(this.addDeleteBtnShadow.bind(this), 500);
    },

    removeMouseHoldDown: function () {
        clearTimeout(this.timeoutId);
    },

    addDeleteBtnShadow: function () {
            this.$el.append('<a href="#" class="remove">X</a>');
            this.$el.addClass('is-shadow');
    },

    removeDeleteBtnShadow: function () {
        this.$el.find('.remove').remove();
        this.$el.removeClass('is-shadow');
    }

});

Answer 1

将event作为参数传递并使用.stopPropagation()。

removeMouseHoldDown: function (e) 
{
   e.stopPropagation();
}

Answer 2

我刚刚通过在子函数上添加event.stopPrpagation来解决这个问题。例如 -

var parentView = new Backbone.View.extend({
    ...
    events: {
        "click": "renderSomething"
    },
    renderSomething: function() {
        //some rendering code
    }
});

var childView = new Backbone.View.extend({
    ...
    events: {
        "click": "renderSomething"
    },
    renderSomething: function(event) {
         event.stopPropagation(); //this will stop the event from being propagated to the parent
        //some rendering code
    }
});

单击子元素也会触发其上的click事件

2 个答案: