Label

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Label

Employment/Purpose

A label component represents a piece of text.

Example

ZKComRef Label.PNG

 <window title="Label Demo" >
 <grid>
     <rows>
         <row>Label(normal): <label id="lb1"/></row>
         <row>Label(color): <label id="lb2" style="color:red"/></row>
         <row>Label(font): <label id="lb3" style="font-weight:bold"/></row>
         <row>Label(size): <label id="lb4" style="font-size:14pt"/></row>
         <row>Label(maxlength): <label id="lb5" maxlength="5"/></row>
         <row>Label(pre): <label id="lb6" pre="true"/></row>
         <row>input:
             <textbox id="txt" rows="2"><attribute name="onChange">
                     lb1.value=self.value;
                     lb2.value=self.value;
                     lb3.value=self.value;
                     lb4.value=self.value;
                     lb5.value=self.value;
                     lb6.value=self.value;
             </attribute></textbox>
         </row>
     </rows>
 </grid>
 </window>

You can control how a label is displayed with the style, pre and maxlength Properties.

For example, if you specify pre to be true, all white spaces, such as new line, space and tab, are preserved.


[For ZK3 users]

The specification of display behavior about pre, maxlength, and multiline is slightly different in ZK3. Please refer to ZK - Form and Inputs.

A label component represents a piece of text.

FormAndInput 1.png

<window border="normal"> 
	Hello World
</window>

If you want to add an attribute to a label, it has to be written as follows:

FormAndInput 2.png

<window border="normal">
	<label style="color: red" value="Hello World" />
</window>

Tip: ZUML is XML, not HTML, so it doesn't accept &nbsp;. However, you can use &#160; instead.

Properties

Pre, Hyphen, Maxlength and Multiline

[since 5.0.0]

You can control how a label is displayed using the pre, multiline and maxlength properties. For example, if you specify pre to be true, all white spaces, such as new lines, spaces and tabs, are preserved.

pre
multiline
maxlenth
Description
true
any
any
All white spaces are preserved, including new lines, spaces and tabs.
false
true
any
New lines are preserved.
false
false
positive
The label only show its value up to the length of "maxlength".
false
false
0
The label is displayed regularly.

ZKComRef Label Text ZK5.png

<window border="normal" width="300px">
	<vbox id="result">
		<label id="lb1" pre="true"></label>
		<separator bar="true"/>
		<label id="lb2" multiline="false" />
		<separator bar="true"/>
		<label id="lb3" maxlength="10" />
		<zscript><![CDATA[
			lb1.value = "    this   thing   has   spaces.\nnext line.";
			lb2.value = "    this   thing   no   space.\nnext line.";
			lb3.value = "    this is more than 10 chars.";
		]]></zscript>
	</vbox>
</window>
[For ZK3 users]

This displaying rule is slightly different in ZK3.

pre
maxlenth
hyphen
Description
false
positive
false
Truncated the characters that exceeds the specified maxlength.
any
positive
true
If the length of a line exceeds maxlength, the line is hyphenated.
true
any
false
maxlength is ignored.
any
0
any
hyphen is ignored.

FormAndInput 3.png

 
<window border="normal" width="100px">
	<vbox id="result">
	</vbox>
	<zscript><![CDATA[
		String[] s = {"this is 9", "this is ten more to show",
			"this framework", "performance is everything"};
    	for (int j = 0; j < s.length; ++j) {
			Label l = new Label(s[j]);
			l.maxlength = 9;
			l.hyphen = true;
			l.parent = result;
		}
    ]]>
    </zscript>
</window>

The multiline property is similar to the pre property, except it only preserves new lines and white space at the beginning of each line.

Supported Events

Name
Event Type
None None

Supported Children

*NONE

Use Cases

Version Description Example Location
     

Version History

Last Update : 2010/11/26


Version Date Content
     



Last Update : 2010/11/26

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