Version 4.2.6 for Mainframes (Update)
 —  Natural for Ajax  —

CHECKBOX

The CHECKBOX control displays a check box. It represents a boolean value in the application.

The following topics are covered below:


Properties

Basic
valueprop

Name of the adapter parameter that represents the control in the adapter.

Obligatory  
comment

Comment without any effect on rendering and behaviour. The comment is shown in the layout editor's tree view.

Optional  
Appearance
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%

displayonly

If set to true, the FIELD will not be accessible for input. It is just used as an output field.

Optional

true

false

align

Horizontal alignment of control in its column.

Each control is "packaged" into a column. The column itself is part of a row (e.g. ITR or TR). Sometimes the size of the column is bigger than the size of the control itself. In this case the "align" property specifies the position of the control inside the column. In most cases you do not require the align control to be explicitly defined because the size of the column around the controls exactly is sized in the same way as the contained control.

If you want to directly control the alignment of text: in most text based controls there is an explicit property "textalign" in which you align the control's contained text.

Optional

left

center

right

valign

Vertical alignment of control in its column.

Each control is "packaged" into a column. The column itself is part of a row (e.g. ITR or TR). Sometimtes the size of the column is bigger than the size of the control. In this case the "align" property specify the position of the control inside the column.

Optional

top

middle

bottom

colspan

Column spanning of control.

If you use TR table rows then you may sometimes want to control the number of columns your control occupies. By default it is "1" - but you may want to define the control to span over more than one columns.

The property only makes sense in table rows that are snychronized within one container (i.e. TR, STR table rows). It does not make sense in ITR rows, because these rows are explicitly not synched.

Optional

1

2

3

4

5

50

int-value

rowspan

Row spanning of control.

If you use TR table rows then you may sometimes want to control the number of rows your control occupies. By default it is "1" - but you may want to define the control two span over more than one columns.

The property only makes sense in table rows that are snychronized within one container (i.e. TR, STR table rows). It does not make sense in ITR rows, because these rows are explicitly not synched.

Optional

1

2

3

4

5

50

int-value

invisiblemode

If the visibility of the control is determined dynamically by an adapter property then there are two rendering modes if the visibility is "false":

(1) "invisible": the control is not visible.

(2) "disabled": the control is deactivated: it is "grayed" and does not show any roll over effects any more.

Optional

invisible

cleared

tabindex

Index that defines the tab order of the control. Controls are selected in increasing index order and in source order to resolve duplicates.

Optional

-1

0

1

2

5

10

32767

Label
name

Text that is displayed inside the control. Please do not specify the name when using the multi language management - but specify a "textid" instead.

Optional  
textid

Multi language dependent text that is displayed inside the control. The "textid" is translated into a corresponding string at runtime.

Do not specify a "name" inside the control if specifying a "textid".

Optional  
hdistpixelwidth

Witdh of the distance between checkbox and label in pixel.

Optional  
labelstyle

CSS style definition that is directly passed into this control.

With the style you can individually influence the rendering of the control. You can specify any style sheet expressions. Examples are:

border: 1px solid #FF0000

background-color: #808080

You can combine expressions by appending and separating them with a semicolon.

Sometimes it is useful to have a look into the generated HTML code in order to know where direct style definitions are applied. Press right mouse-button in your browser and select the "View source" or "View frame's source" function.

Optional

background-color: #FF0000

color: #0000FF

font-weight: bold

Binding
valueprop (already explained above)    
displayprop

Name of the adapter parameter that dynamically passes information whether the field is displayonly(true) or not (false).

Optional  
statusprop

Name of the adapter parameter that dynamically passes information how the control should be rendered and how it should act. Use DISPLAYPROP to dynamically define whether the field is displayonly.

Optional  
flush

Flushing behaviour of the input control.

By default an input into the control is registered within the browser client - and communicated to the server adapter object when a user e.g. presses a button. By using the FLUSH property you can change this behaviour.

Setting FLUSH to "server" means that directly after changing the input a synchronization with the server adapter is triggered. As consequence you directly can react inside your adapter logic onto the change of the corresponding value. - Please be aware of that during the synchronization always all changed properties - also the ones that were changed before - are transferred to the adapter object, not only the one that triggered the synchonization.

Setting FLUSH to "screen" means that the changed value is populated inside the page. You use this option if you have redundant usage of the same property inside one page and if you want to pass one changed value to all its representaion directly after changing the value.

Optional

screen

server

flushmethod

When the data synchronization of the control is set to FLUSH="server" then you can specify an explicit event to be sent when the user updates the content of the control. By doing so you can distinguish on the server side from which control the flush of data was triggered.

Optional  
Online Help
helpid

Help id that is passed to the online help management in case the user presses F1 on the control.

Optional  
title

Text that is shown as tooltip for the control.

Either specify the text "hard" by using this TITLE property - or use the TITLETEXTID in order to define a language dependent literal.

Optional  
titletextid

Text ID that is passed to the multi lanaguage management - representing the tooltip text that is used for the control.

Optional  
Miscellaneous
testtoolid

Use this attribute to assign a fixed control identifier that can be later on used within your test tool in order to do the object identification

Optional  

Typically, the CHECKBOX is followed by a LABEL control naming the displayed check box. In the LABEL definition, set the property asplaintext to "true".

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