Signature"

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= Signature =
 
= Signature =
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{{versionSince| 8.6.0}}
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{{ZK EE}}
  
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*Java API: <javadoc>org.zkoss.zkmax.wgt.Signature</javadoc>
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*Java API: <javadoc>org.zkoss.zkmax.zul.Signature</javadoc>
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*JavaScript API: <javadoc directory="jsdoc">org.zkoss.zkmax.wgt.Signature</javadoc>
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*JavaScript API: <javadoc directory="jsdoc">zkmax.wgt.Signature</javadoc>
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[ ZK EE ]
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[ since 8.6.0 ]
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= Browser Support =
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*This component supports IE10+ and modern browsers.
  
 
= Employment/Purpose =
 
= Employment/Purpose =
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A Signature component represents a signature pad which can let user to take a signature on zk. It supports the desktop and touch-panel device. The Signature widget provides save, undo and clear API, you can save undo and clear the SignaturePad with this API. And Signature also provide a build-in tool bar to control the API.
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Signature components support signature pad on the desktop and mobile browsers. User can customize pen size, pen color, background color etc., it also provides undo, save and clear methods.
  
 
= Example =
 
= Example =
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[[Image:Signaturezkoss.jpg]]
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[[File:Signature.png]]
  
 
<source lang="xml" >
 
<source lang="xml" >
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  <signature id="s" height="100px" width="400px" style="border: 1px solid black;"'/>
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<signature width="600px" height="300px" penColor="white" backgroundColor="#AED6F1" penSize="6"/>
 
</source>
 
</source>
  
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= Undo Save Clear =
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== Buttons ==
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There are 3 buttons when you hover on this component: (from left to right)
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# '''undo''': to remove the last step that was drawn on the signature pad.
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# '''save''': to save the signature image to the server, a user can get the image by listening onSave event.
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# '''clear''': to clear signature pad.
  
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There are some of APIs to control the Signature widget. Undo is removing the last step which was drawn on the signature pad. Save is saving the signature data to the server side as a base64 data type, user can get the image data by getImage() or getSignatureBase64(). Clear is to clear signature pad, and the signature pad would reset to empty.
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= toolbarVisible =
  
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= Toolbar =
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The toolbar contains 3 buttons: undo button, clear button, and save button. They are visible by default. If you can hide them:
  
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The attribute of the tool bar is a boolean value, it controls the visibility of the tool bar, if the value is true, the user can use and see the tool bar, if not, they won't. And the user can customize css by using less, to reset the toolbar's position, size and some other features.
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<source lang="xml">
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<signature toolbarVisible="false"/>
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</source>
  
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= penSize penColor backgroundColor =
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The toolbar buttons only contain icons by default. If you want to show message after icons on the buttons, we provide three attributes: <code>undoLabel</code>, <code>clearLabel</code>, and <code>saveLabel</code>.
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  There are some attributes to control the basic properties of the signature pad. The penSize is the pen size of the signature pad, the penColor is the pen color of the signature pad, and the backgroundColor is the backgroundColor of the signature pad.
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Default:
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[[File:Signature toolbar.png]]
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Customized:
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[[File:Signature toolbar2.png]]
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<source lang="xml">
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<signature undoLabel="Undo" clearLabel="Clear" saveLabel="Save"/>
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</source>
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= Style Attributes =
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There are some attributes to adjust the signature style:
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== penSize==
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the width of a line on the signature, the default is 1.
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== penColor ==
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Can be any color format accepted by context.fillStyle(canvas), defaults to black.
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== backgroundColor==
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Can be any color format accepted by context.fillStyle(canvas), defaults to white.
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== backgroundImage==
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{{versionSince| 9.6.0}}
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Can be any image format accepted by context.drawImage(canvas), defaults to null.
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= BackgroundIncluded =
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{{versionSince |9.6.0}}
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The background color and image will be saved by default.  If you don't want to save the background color and image, please use the following setting.
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<source lang="xml">
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<signature backgroundIncluded="false"/>
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</source>
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== Scanned Paper Form==
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You can load a scanned paper form as a background and save it with a signature.
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[[File:Paper-form.jpg|center]]
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= Saves Signature Image =
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After clicking "Save" button, the component will upload the signature to a server. You can listen <code>onSave</code> to get the uploaded signature and show it with [https://www.zkoss.org/wiki/ZK_Component_Reference/Essential_Components/Image Image]:
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<source lang="xml">
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<signature onSave="image.setContent(event.getMedia())"/>
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<image id="image"/>
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</source>
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== File Size Limit ==
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If you see <code>SizeLimitExceededException</code>, you can adjust max uploading file size by
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[[ZK_Configuration_Reference/zk.xml/The_system-config_Element/The_max-upload-size_Element | file-size-threshold]].
  
 
=Supported Events=
 
=Supported Events=
  
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{| border="1" | width="100%"
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{| class='wikitable' | width="100%"
 
! <center>Name</center>
 
! <center>Name</center>
 
! <center>Event Type</center>
 
! <center>Event Type</center>
 
|-
 
|-
 
| <center>onSave</center>
 
| <center>onSave</center>
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| '''Event:''' <javadoc>org.zkoss.zk.ui.event.Event</javadoc>
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| '''Event:''' <javadoc>org.zkoss.zk.ui.event.UploadEvent</javadoc>
 
When user invoke the save method, the event would be triggered.  
 
When user invoke the save method, the event would be triggered.  
 
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=Version History=
 
=Version History=
 
{{LastUpdated}}
 
{{LastUpdated}}
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{| border='1px' | width="100%"
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{| class='wikitable' | width="100%"
 
! Version !! Date !! Content
 
! Version !! Date !! Content
 
|-
 
|-

Latest revision as of 10:15, 19 September 2022


DocumentationZK Component ReferenceInputSignature
Signature

Signature

Since 8.6.0

  • Available for ZK:
  • http://www.zkoss.org/product/zkhttp://www.zkoss.org/whyzk/zkeeVersion ee.png

Browser Support

  • This component supports IE10+ and modern browsers.

Employment/Purpose

Signature components support signature pad on the desktop and mobile browsers. User can customize pen size, pen color, background color etc., it also provides undo, save and clear methods.

Example

Signature.png 

<signature width="600px" height="300px" penColor="white" backgroundColor="#AED6F1" penSize="6"/>

Buttons

There are 3 buttons when you hover on this component: (from left to right)

  1. undo: to remove the last step that was drawn on the signature pad.
  2. save: to save the signature image to the server, a user can get the image by listening onSave event.
  3. clear: to clear signature pad.

toolbarVisible

The toolbar contains 3 buttons: undo button, clear button, and save button. They are visible by default. If you can hide them: 

<signature toolbarVisible="false"/>

The toolbar buttons only contain icons by default. If you want to show message after icons on the buttons, we provide three attributes: undoLabel, clearLabel, and saveLabel.

Default:

Signature toolbar.png

Customized:

Signature toolbar2.png 

<signature undoLabel="Undo" clearLabel="Clear" saveLabel="Save"/>

Style Attributes

There are some attributes to adjust the signature style:

penSize

the width of a line on the signature, the default is 1.

penColor

Can be any color format accepted by context.fillStyle(canvas), defaults to black.

backgroundColor

Can be any color format accepted by context.fillStyle(canvas), defaults to white.

backgroundImage

Since 9.6.0 Can be any image format accepted by context.drawImage(canvas), defaults to null.

BackgroundIncluded

Since 9.6.0

The background color and image will be saved by default. If you don't want to save the background color and image, please use the following setting. 

<signature backgroundIncluded="false"/>

Scanned Paper Form

You can load a scanned paper form as a background and save it with a signature.

Paper-form.jpg

Saves Signature Image

After clicking "Save" button, the component will upload the signature to a server. You can listen onSave to get the uploaded signature and show it with Image: 

	<signature onSave="image.setContent(event.getMedia())"/>
	<image id="image"/>

File Size Limit

If you see SizeLimitExceededException, you can adjust max uploading file size by file-size-threshold.

Supported Events

Name
Event Type
onSave
 Event: UploadEvent

When user invoke the save method, the event would be triggered.

onClear
 Event: Event

When user invoke the clear method, the event would be triggered.

Version History

Last Update : 2022/09/19


Version Date Content
8.6.0 August 2018



Last Update : 2022/09/19

Copyright © Potix Corporation. This article is licensed under GNU Free Documentation License.


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