ZK Developer's Reference/UI Patterns/Grid's Columns and Hflex

This section introduce the usage of ZK auto sizing APIs, all of these can apply to following components :

Listbox Listhead Listheader

Grid Columns Column

Tree Treecols Treecol

Use Cases

Here we take grid with column as an example, showing some use case about how to use the right way to display the data.

Data Length : Short

<syntax lang='xml' high='12,13,14,15,16'> <zk>

	<zscript><![CDATA[
	String[] msgs2 = {
 			"Application Developer's Perspective",
 			"Server+client Fusion architecture",
 			"Component Developer's Perspective",
 			"Execution Flow of Loading a Page",
			"Execution Flow of Serving an Ajax Request",
 			"When to Send an Ajax Request"  	
	};
	]]></zscript>

<listbox width="800px">

		<listhead>
			<listheader label="Product" />
			<listheader label="Description" />
			<listheader label="Comment" />
		</listhead>
		<listitem>

<listcell><label value="${msgs2[0]}"></label></listcell>

			<listcell><label value="${msgs2[1]}"></label></listcell>
			<listcell><label value="${msgs2[2]}"></label></listcell>
		</listitem>
		<listitem>
			<listcell><label value="${msgs2[3]}"></label></listcell>
			<listcell><label value="${msgs2[4]}"></label></listcell>
			<listcell><label value="${msgs2[5]}"></label></listcell>
		</listitem>

</listbox> <zk> </syntax>

Proportional Width

In this case, the default data component will show the data correctly, width proportional width 1 : 1 : 1

Sure you can use the hflex we have mentioned in previous section.

<syntax lang='xml' start="13"> <listhead>

			<listheader label="Product" hflex="1"/>
			<listheader label="Description" hflex="2"/>
			<listheader label="Comment" hflex="1" />
	</listhead>

</syntax>

Minimum Flexibility

In the cases of hflex=min, if you your content fill the whole data component, you can use span=true

<syntax lang='xml' start="2" high='5,8'>

       <zscript><![CDATA[
	String[] msgs2 = {
 			"Application Developer's Perspective",
 			"Very Short Text",
			"Server+client Fusion architecture",
			"Execution Flow of Serving an Ajax Request",
			"Very Short Text",
			"When to Send an Ajax Request (Addition Text )"
 	};
       ]]></zscript>

</syntax>

• Origional

<syntax lang='xml' start="13"> <listhead>

			<listheader label="Product" hflex="min"/>
			<listheader label="Description" hflex="min"/>
			<listheader label="Comment" hflex="min" />
	</listhead>

</syntax>

• Set span=true

<syntax lang='xml' start="12" high='12'>

   <listbox width="800px" span='true'>

<listhead>

			<listheader label="Product" hflex="min"/>
			<listheader label="Description" hflex="min"/>
			<listheader label="Comment" hflex="min" />
	</listhead>

</syntax>

Data Length : Long

<syntax lang='xml' start="2" high='5,8'>

       <zscript><![CDATA[
       String[] msgs2 = {
 			"Application Developer's Perspective", 

"Very Long Long Long Long Long Long Long Long Long Long Text",

			"Server+client Fusion architecture",
			"Execution Flow of Serving an Ajax Request",
			"Very Long Long Long Long Long Long Long Long Long Long Text",
			"When to Send an Ajax Request" 
       };
       ]]></zscript>

</syntax>

Version History

Version	Date	Content
5.0.6-FL	02/15/2011	New specification of auto-sizing