javascript - 实现 Bootstrap 进度条以通知用户类(class)进度

Question

我一直在互联网上寻找如何创建一个进度条，通知用户他们已经完成了多少工作。我理解 HTML 部分，如 Bootstrap's website. 所示但是，我不明白应该如何使用 JavaScript 从 view code api 检索到的用户数据(指示已获取的类和剩余的类)来显示进度用户进度条。

任何帮助/解释(你的思考过程是什么？有关于这方面的好的教程吗？)，这个菜鸟非常感谢!我希望保持最佳实践和表现，因为我仍在学习。谢谢!

我正在查看 Stacks 问题，其中包含 user input更改进度条(不太正确)，time incrementation ，另一个使用 checkboxes改变进度条(重点是这里的JS代码)。

当前使用:Python 2.7、Pyramid(Web 框架)、Boostrap/Jinja2 模板

<小时/>

查看代码:

@view_config(route_name='assessments', request_method='GET', renderer='templates/unique_assessments.jinja2', permission='create')
def view_unique_microseries_group(request):
    logged_in_userid  = authenticated_userid(request)
    if logged_in_userid is None:
        raise HTTPForbidden()

    all_assessments = api.retrieve_assessments() #all assessments in a list

    #url = HTTPSeeOther(location=request.route_url('microseries'))
    return {'logged_in': logged_in_userid, 'all_assessments': all_assessments}


@view_config(route_name='microseries', request_method='GET', renderer='templates/assessments.jinja2', permission='create')
def view_microseries_subseries(request):
    logged_in_userid  = authenticated_userid(request) #Authenticated User
    if logged_in_userid is None:
        raise HTTPForbidden()

    microseries = int(request.matchdict['id']) #grabs class no. from link in assessments
    microseries_list = api.retrieve_assessment(microseries=microseries)
    #print 'microseries_list', microseries_list #prints all the matching number of microseries

    all_assessments = api.retrieve_assessments() #all assessments in a list
    user_results = api.retrieve_assessment_results() #all user results in a list

    completed_assessments = []
    pending_assessments = []

    for assessment in all_assessments:
        if assessment is None: # assumes None
            continue

        found_assessment_result = False
        for result in user_results:
            if result.owner.username == logged_in_userid and result.assessment == assessment:
                found_assessment_result = True # assign Boolean statement
                break # no need to check further

        if found_assessment_result:
            completed_assessments.append(assessment)
        else:
            pending_assessments.append(assessment)

    message = 'Completed'

    return {'completed_assessments': completed_assessments, 'pending_assessments': pending_assessments, 'logged_in': logged_in_userid, 'message': message, 'all_assessments':all_assessments, 'microseries_list': microseries_list}

显示整个类(class)目录的主页 HTML模板:unique_assessments.jinja2

    <!-- Stats Gallery Section with Progress bar in each thumbnail-->
<div class="container">
    <div class= 'gallery'>
        <div class="row">
    <div class="col-sm-8 col-md-3 ">
            <div class="thumbnail">
                <a href="{{request.application_url}}/microseries/1">
                    <img src="{{request.static_url('img.png')}}" alt="Training" class="img-responsive"  style="width: 200px; height: 100px;"/>
                </a>
            <h4>Video Series 1</h4>
            <p class="tag">Contains Episodes 1A-1F </p>
            <div class="progress">
                <div class="progress-bar progress-bar-striped" role="progressbar" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100" style="width: 100%"> 100%
                </div>
            </div>
            <p class="text_column"></p>
        </div>
    </div><!-- /.col-->

  <div class="col-sm-8 col-md-3 ">
        <div class="thumbnail">
        <a href="{{request.application_url}}/microseries/2">
                <img src="{{request.static_url('img.png')}}" alt="Training" class="img-responsive" style="width: 200px; height: 100px;"/>
        </a>
            <h4>Video Series 2</h4>
            <p class="tag">Contains Episodes 2A-2E </p>
            <div class="progress">
                <div class="progress-bar progress-bar-info progress-bar-striped" role="progressbar" aria-valuenow="20" aria-valuemin="0" aria-valuemax="100" style="width: 20%"> 20%
                </div>
            </div>
            <p class="text_column"></p>
        </div>
    </div><!-- /.col-->

  <div class="col-sm-8 col-md-3 ">
        <div class="thumbnail">
            <a href="{{request.application_url}}/microseries/3">
                    <img src="{{request.static_url('img.png')}}" alt="Training" class="img-responsive" style="width: 200px; height: 100px;"/>
                </a>
            <h4>Video Series 3</h4>
            <p class="tag">Contains Episodes 3A-3G </p>
            <div class="progress">
                <div class="progress-bar progress-bar-info progress-bar-striped" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%"> 60%
                </div>
            </div>
            <p class="text_column"></p>
        </div>
    </div><!-- /.col-->

<div class="col-sm-8 col-md-3 ">
        <div class="thumbnail">
            <a href="{{request.application_url}}/microseries/4">
            <img src="{{request.static_url('img.png')}}" alt="Training" class="img-responsive"  style="width: 200px; height: 100px;"/>
        </a>
            <h4>Video Series 4</h4>
            <p class="tag">Contains Episodes 4A-4E </p>
            <div class="progress">
                <div class="progress-bar progress-bar-info progress-bar-striped" role="progressbar" aria-valuenow="80" aria-valuemin="0" aria-valuemax="100" style="width: 80%"> 80%
                </div>
            </div>
            <p class="text_column"></p>
        </div>
    </div><!-- /.col-->

  <div class="col-sm-8 col-md-3 ">
        <div class="thumbnail">
            <a href="{{request.application_url}}/microseries/5">
                <img src="{{request.static_url('img.png')}}" alt="Training" class="img-responsive"  style="width: 200px; height: 100px;"/>
            </a>
            <h4>Video Series 5</h4>
            <p class="tag">Contains Episodes 5A-5G </p>
            <div class="progress">
                <div class="progress-bar progress-bar-info progress-bar-striped" role="progressbar" aria-valuenow="80" aria-valuemin="0" aria-valuemax="100" style="width: 80%"> 80%
                </div>
            </div>
            <p class="text_column"></p>
        </div>
    </div><!-- /.col-->
</div><!-- /.row-->
</div><!-- Gallery Container Ends -->

JS代码:不确定如何让它与来自 View 代码的数据交互

Answer 1

您不需要任何 JavaScript 来显示进度条。当用户更改页面上的某些内容而无需重新加载页面时，您可能需要一些 JavaScript 来更新进度栏，据我所知，这不是您的情况。

进度条基本上是两个嵌套的 div；内部 div 使用 CSS 着色，其宽度设置为其父级宽度的给定百分比。您所需要的只是在模板中生成正确的标记。

<div class="progress">
  <div class="progress-bar" ... style="width: {{course_completion_percent}}%;">
    {{course_completion_percent}}%
  </div>
</div>

(当然，在您的 View 函数中，您需要计算course_completion_percent变量并将其传递给模板)。像这样的事情会做:

course_completion_percent = 100.0 * len(completed_assessments) / len(all_assessments)

return {
    ...
    'course_completion_percent': course_completion_percent,
}