Question

在此代码中，

<p:galleria value="#{Bean.images}" var="image" panelWidth="500" panelHeight="313" showCaption="true"
<p:graphicImage value="/images/galleria/#{image}" alt="Image Description for #{image}" title="#{image}"/ 
</p:galleria>

你如何得到selectedImage？如表达的那样

<p:carousel id="carousel" value="#{tableBean.carsSmall}" var="car" itemStyleClass="carItem" headerText="Cars"> 
    <p:graphicImage id="image" value="/images/cars/#{car.manufacturer}.jpg"/>   

    <h:panelGrid columns="2" style="width:100%" cellpadding="5"> 
        <h:outputText value="Model: " /><h:outputText id="model" value="#{car.model}" /> 
    </h:panelGrid> 

    <p:commandLink id="view" update=":form:carDetail" oncomplete="carDialog.show()" title="View Detail"> 
        <h:outputText styleClass="ui-icon ui-icon-search" style="margin:0 auto;" />   
        <f:setPropertyActionListener value="#{car}"   
                target="#{tableBean.selectedCar}" /> 
    </p:commandLink> 
</p:carousel>

Answer 1

假设您在每个当前显示的图片上都有详细信息按钮（将alt属性设置为图像文件名）

<p:galleria value="#{Bean.images}" var="image">
  <p:graphicImage value="/images/galleria/#{image}"/>

  <f:facet name="content"> 
    <p:graphicImage value="/images/galleria/#{image}" alt="#{image}" />
    <span style="position:absolute;right:0;top:0;">
      <p:commandButton styleClass="ui-icon ui-icon-search" onclick="jsCallRemote(this);" />
    </span>
 </f:facet>
</p:galleria>

搜索按钮可以调用js函数传递按钮本身作为提示找到当前图像文件名，然后调用远程命令将文件名作为请求参数传递给它：

<script>
function jsCallRemote(btn) {
    var imageFileName = btn.parentNode.parentNode.getElementsByTagName('img')[0].alt;
    selectImage([{name:'imageFileName', value:imageFileName}]);
}
</script>

<p:remoteCommand name="selectImage" actionListener="#{tableBean.selectImage}" />

bean的方法通过请求参数imageFileName：

进行实际选择

public void selectImage() {
  String fileName = FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("imageFileName");
  // find image by filename...
}

Answer 2

如果您不想打算为每个图像设置一个按钮，则可以利用图库标题来捕获所选的图像标题。此解决方案基于andreea m的答案。

from django import forms
from wagtail.admin.edit_handlers import FieldPanel


class ScheduleCell(models.Model):
    # ... field definitions here ...

    panels = [
        # ...
        FieldPanel('start_time', widget=forms.TextInput),
        FieldPanel('end_time', widget=forms.TextInput),
        # ...
    ]

JS函数

        <p:commandButton action="#{controller.preview}" value="Preview" onclick="checkSelectedImage();" oncomplete="PF('previewDialog').show();"/>

远程命令

      function checkSelectedImage() {
            var caption = document.getElementsByClassName("ui-galleria-caption");
            selectImage([{name:'imageFileName', value:caption[0].getElementsByTagName("h4")[0].innerHTML}]);
        }

如何从中获取所选图像

2 个答案: