如何在质数中有多于一列的复选框 [英] how to have more than one column of checkboxes in primefaces
问题描述
我需要使用primefaces数据表来做一个用户权限网格.对于每一行:第一列是类名,第二列是两个子类之一的许可复选框.第三列是允许其他子类使用的复选框.第2列和第3列的标题必须具有子类标题以及一个复选框,该切换将切换该子类中的所有其他复选框.我想我可以在滚动面板中并排使用两个或三个数据表,但是在将复选框的文本列在复选框左侧时出现了问题(它想放在顶部).
我尝试过的另一件事是为每个子类的每一行都具有一个selectbooleancheckbox,然后为列标题复选框提供了一个侦听器,该复选框遍历列表中的每个项目并相应地设置了值.我这里的问题是,当我更新数据表时,所有复选框都停留在已检查"状态.
I need to do a user permissions grid hopefully using a primefaces datatable. For each row: Column one is a class name, Column two is a checkbox for permission for one of two subclasses. Column three is a checkbox for permission for the other subclass. The headers of columns two and three must have the subclass title plus a checkbox, the toggles all the other checkboxes in that subclass. I think I can use two or three datatables side by side inside a scrollpanel but I'm having issues lining up the column text to the left of the checkbox (it wants to go on top).
Another thing I tried was to just have a selectbooleancheckbox for each row for each subclass and then have a listener for the column header checkbox that iterates through each item in the list and set the value accordingly. The issue I have here is that when I update the datatable, then all the checkboxes get stuck in the 'checked' state.
这是我的网格:---------------------------------------- |
This is what my grid: ----------------------------------------|
此表可能有'n'行.
有人能给我指出我想做的事的例子吗?
Does anyone have examples of what I want to do that they can point me to?
谢谢
推荐答案
首先,请确保您具有可以将复选框绑定到其中的某种模型.例如:
To start of, make sure you have some kind of model where you can bind the checkboxes to. For example:
public class MyObject {
private String name;
private boolean bool1;
private boolean bool2;
// Add getters and setters
public MyObject(String name, boolean bool1, boolean bool2) {
this.name = name;
this.bool1 = bool1;
this.bool2 = bool2;
}
}
然后,在您的bean中添加一个布尔值列表,以将复选框的状态存储在标头中:
Then, in your bean add a list of booleans to store the state of the checkboxes in the header:
private List<MyObject> myObjects = new ArrayList<>();
private List<Boolean> headerChecks = new ArrayList<>();
// Add getter and setter
@PostConstruct
private void init() {
myObjects.add(new MyObject("Object 1", false, true));
myObjects.add(new MyObject("Object 2", false, false));
myObjects.add(new MyObject("Object 3", true, true));
headerChecks.add(false);
headerChecks.add(false);
}
现在,在复选框列标题中有一个带有侦听器的复选框.在侦听器中,设置该列所有复选框的状态.然后仅更新列中的复选框.为此,我使用了选择器选择具有特定元素的元素类别: @(.bool1)
.
Now, in the checkbox column header have a checkbox with a listener. In the listener set the state of all checkboxes of that column. Then update only the checkboxes in the column. To do so I've used a selector selecting elements with a specific class: @(.bool1)
.
<p:column>
<f:facet name="header">
<p:selectBooleanCheckbox id="bool1" value="#{myBean.headerChecks[0]}">
<p:ajax listener="#{myBean.headerClickListener}"
update="@(.bool1)"/>
</p:selectBooleanCheckbox>
<p:outputLabel for="bool1" value="Bool 1"/>
</f:facet>
<p:selectBooleanCheckbox value="#{item.bool1}" styleClass="bool1"/>
</p:column>
在侦听器中,设置了相应行复选框的状态:
In listener the state of the corresponding row checkboxes is set:
public void headerClickListener(AjaxBehaviorEvent event) {
for (MyObject myObject : myObjects) {
if (event.getComponent().getId().equals("bool1")) {
myObject.setBool1(headerChecks.get(0));
}
if (event.getComponent().getId().equals("bool2")) {
myObject.setBool2(headerChecks.get(1));
}
}
}
完整表格:
<p:dataTable id="dataTable" value="#{myBean.myObjects}" var="item">
<p:column headerText="Name">
<h:outputText value="#{item.name}"/>
</p:column>
<p:column>
<f:facet name="header">
<p:selectBooleanCheckbox id="bool1" value="#{myBean.headerChecks[0]}">
<p:ajax listener="#{myBean.headerClickListener}"
update="@(.bool1)"/>
</p:selectBooleanCheckbox>
<p:outputLabel for="bool1" value="Bool 1"/>
</f:facet>
<p:selectBooleanCheckbox value="#{item.bool1}" styleClass="bool1"/>
</p:column>
<p:column>
<f:facet name="header">
<p:selectBooleanCheckbox id="bool2" value="#{myBean.headerChecks[1]}">
<p:ajax listener="#{myBean.headerClickListener}"
update="@(.bool2)"/>
</p:selectBooleanCheckbox>
<p:outputLabel for="bool2" value="Bool 2"/>
</f:facet>
<p:selectBooleanCheckbox value="#{item.bool2}" styleClass="bool2"/>
</p:column>
</p:dataTable>
请注意,这一切都是相当湿的.您可能想稍微塞满东西.
Please note that this is all quite WET. You might want to DRY stuff up a bit.
结果:
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