TAGCLOUD

The TAGCLOUD control represents a collection of tags. A tag is a keyword assigned to an information resource (picture, video clip or others). In a tag cloud, the tags are mainly shown by their popularity.

The following topics are covered below:


Example

Tagcloud

As you can see, different tags can be added to a tag cloud. They differ by their popularity. The most popular tags are those with a bigger font size.

The XML layout definition is:

<itr>
   <tagcloud tagcloudprop="tagCloud"
          width="300" height="350"
          borderstyle="dotted" borderwidth="1px"
          bordercolor="#0000FF" backgroundcolor="#E6E6FA"
          textcolor="#0000FF">
   </tagcloud>
</itr>

The tag cloud can be customized by defining a background color. Use the Style Sheet Editor to apply your own style.

The Java code of the adapter is:

public classTagcloudAdapter
    extends Adapter
{
    /** sub class TAGCLOUDInfo to react on click events*/
    public class MyTagcloudInfo extends TAGCLOUDInfo
    {
      public void trigger()
      {
        outputMessage(MT_SUCCESS, getSelectedTagName());
      }
    }

    // property >tagCloud<
    MyTagcloudInfo m_tagCloud=new MyTagcloudInfo();
    public MyTagcloudInfo getTagCloud() { return m_tagCloud; }

    /** called on page load*/
    public void init()
    {
        m_tagCloud.addTag("computer");
        m_tagCloud.addTag("technology");
        m_tagCloud.addTag("java", TAGCLOUDInfo.TAGPOPULARITY_5_VERYBIG);
        m_tagCloud.addTag("books");
        m_tagCloud.addTag("drinks");
        m_tagCloud.addTag("music", TAGCLOUDInfo.TAGPOPULARITY_4_BIG);
        m_tagCloud.addTag("people");
        m_tagCloud.addTag("germany", TAGCLOUDInfo.TAGPOPULARITY_4_BIG);
        m_tagCloud.addTag("summer", TAGCLOUDInfo.TAGPOPULARITY_4_BIG);
        m_tagCloud.addTag("flowers");
        m_tagCloud.addTag("kids", TAGCLOUDInfo.TAGPOPULARITY_2_SMALL);
        m_tagCloud.addTag("holiday");
        m_tagCloud.addTag("semantic", TAGCLOUDInfo.TAGPOPULARITY_4_BIG);
        m_tagCloud.addTag("micro", TAGCLOUDInfo.TAGPOPULARITY_2_SMALL);
        m_tagCloud.addTag("birthday");

        . . .

        . . .
    }
}

A tag cloud is bound to a TAGCLOUDInfo object. Using this object you can add tags with different popularities. All tags with the same popularity have their own stylesheet class. You can also remove tags and get the last tag which has been selected by the user. When you want to react on click events, you can override the trigger() function of the TAGCLOUDInfo object and add specific code.

Properties

Basic
tagcloudprop

Name of the adapter property that represents the control on server side.

Return type must be "TAGCLOUDInfo".

Obligatory  
width

Width of the control.

There are three possibilities to define the width:

(A) You do not define a width at all. In this case the width of the control will either be a default width or - in case of container controls - it will follow the width that is occupied by its content.

(B) Pixel sizing: just input a number value (e.g. "100").

(C) Percentage sizing: input a percantage value (e.g. "50%"). Pay attention: percentage sizing will only bring up correct results if the parent element of the control properly defines a width this control can reference. If you specify this control to have a width of 50% then the parent element (e.g. an ITR-row) may itself define a width of "100%". If the parent element does not specify a width then the rendering result may not represent what you expect.

Optional

100

120

140

160

180

200

50%

100%

height

Height of the control.

There are three possibilities to define the height:

(A) You do not define a height at all. As consequence the control will be rendered with its default height. If the control is a container control (containing) other controls then the height of the control will follow the height of its content.

(B) Pixel sizing: just input a number value (e.g. "20").

(C) Percentage sizing: input a percantage value (e.g. "50%"). Pay attention: percentage sizing will only bring up correct results if the parent element of the control properly defines a height this control can reference. If you specify this control to have a height of 50% then the parent element (e.g. an ITR-row) may itself define a height of "100%". If the parent element does not specify a width then the rendering result may not represent what you expect.

Optional

100

150

200

250

300

250

400

50%

100%

borderstyle

Choose the style the controls border.

Optional

solid

double

groove

dotted

dashed

inset

outset

ridge

hidden

borderwidth

Border size of control in pixels. Specify "0" not to render

any border at all.

Optional

thin

medium

thick

1px

2px

5px

10px

bordercolor

Sets the border color of the control.

Optional

#FF0000

#00FF00

#0000FF

#FFFFFF

#808080

#000000

backgroundcolor

Sets the background color of the control.

Optional

#FF0000

#00FF00

#0000FF

#FFFFFF

#808080

#000000

textcolor

Sets the text color of the control.

Optional

#FF0000

#00FF00

#0000FF

#FFFFFF

#808080

#000000