Primefaces签名

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📜 Primefaces签名

📅 最后修改于: 2021-01-08 04:15:40 🧑 作者: Mango

它用于绘制签名作为输入。它提供了一个画布，我们可以在其中绘制签名。它提供了各种选项，例如背景色，前景色，用于自定义的厚度。可以在支持触摸的设备中使用。在JSF应用程序中，我们可以使用组件创建它。它还提供了下表中列出的各种属性。

签名属性

Attribute	Default value	Type	Description
id	null	String	It is used to unique identifier of the component.
rendered	true	Boolean	It is used to specify the rendering of the component.
value	null	Object	It is used to set value of the component.
required	false	Boolean	It is used to mark the component as required.
validator	null	MethodExpr	It is used to set validator.
requiredMessage	null	String	It is used to set message to be displayed when required field validation fails.
widgetVar	null	String	It is a name of the client side widget.
backgroundColor	#ffffff	String	It is used to set background color.
color	#000000	String	It is used to set foreground color.
thickness	2	Integer	It is used to set thickness of the lines.
style	null	String	It is used to set inline CSS of the component.
readonly	false	Boolean	It is used to make component readonly.
guideline	false	Boolean	It is used to set a guildeline.
guidelineColor	#a0a0a0	String	It is used to set color of the guideline.
guidelineOffset	25	String	It is used to set offset of guideline from bottom.
guidelineIndent	10	Boolean	It is used to set guide line indent from the edges.
onchange	null	String	It is used to execute script when signature changed.
base65Value	null	String	Write-only value used to pass the value in base64 to backing bean.

例

在下面的示例中，我们正在实现组件。本示例包含以下文件。

JSF文件

// signature.xhtml





Signature

ManagedBean

// SignatureDemo.java

package com.javatpoint;
import javax.faces.bean.ManagedBean;
@ManagedBean
public class SignatureDemo {
private String signature;
public String getSignature() {
return signature;
}
public void setSignature(String signature) {
this.signature = signature;
}
}

输出：