Signature

Signature

• Demonstration: Signature
• Java API: Signature
• JavaScript API: Slider
• Style Guide: Signature

Employment/Purpose

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.

Example

  <signature id="s" height="100px" width="400px" style="border: 1px solid black;"'/>

Undo Save Clear

 [Since 8.6.0]

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.

Toolbar

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.

penSize penColor backgroundColor

 [Since 8.6.0]
 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.

Knob Mold

 [Since 8.6.0]

Set the mold property to "knob" will enable knob slider. So the slider can act as a normal knob. The knob can controlled by wheel, drag, click and enter a value to the input element.

  <slider mold="knob" mold="knob" minpos="0.0" maxpos="100.0" curpos="40.0" step="1"/>

AngelArc & strokeWidth

 [Since 8.6.0]

AngelArc & strokeWidth are properties only for knob mold. Set the angelArc property with a double for the angle of the knob slider. Set the strokeWidth property with a double for the stroke width of the knob.

  <slider mold="knob" mold="knob" minpos="0.0" maxpos="100.0" curpos="40.0" step="1" strokeWidth="20" angelArc="270"/>

Supported Events

Name	Event Type
onScroll	Event: ScrollEvent Denotes the content of a scrollable component has been scrolled by the user.
onScrolling	Event: ScrollEvent Denotes that the user is scrolling a scrollable component. Notice that the component's content (at the server) won't be changed until onScroll is received. Thus, you have to invoke the getPos method in the ScrollEvent class to retrieve the temporary position.

• Inherited Supported Events: XulElement

Supported Molds

Available molds of a component are defined in lang.xml embedded in zul.jar.

Name	Snapshot
default
sphere
scale
knob

[Since 7.0.0] [mold knob Since 8.6.0]

the scale mold is deprecated because designs are changed.

Supported Children

*None

Use Cases

Version	Description	Example Location

Version History

Version	Date	Content
5.0.4	August 2010	Slider.setPageIncrement(int) is supported.
5.0.4	August 2010	Slider support for clicking to increment or decrement
7.0.1	January 2014	Slider support minimal position and decimal mode