Java Development

[bwei]

I need to make a customed ListField which has variable height rows

for example

1  This is first row of the list  

     line1:

     line2

2  This is second row of the list    

    line1

    line2

    line3

3 This is second row of the list  

    line1

.......
 

Thanks very much for your help.


bwei

[rafo]

There is no way, except of creating your own ListField implementation.

[rab]

You can use  the method: setRowHeight(index, rowHeight); to set row heights.

Most of my ListFields are customized by extending the  ObjectListField.

The setRowHeight() can be called during the  drawListRow() or when you add elements ... (depending on your app)

Rab

[bwei]

Hi Rab,

Thanks very much.

I know the following method which sets the height of each row in the list field.

public void setRowHeight(int rowHeight)

 It looks like setRowHeight(index, rowHeight) is undocument method.I am wondering if it is safe to use this method. 

[MSohm]

Methods not listed in the JavaDocs should not be used.  These methods can change or be removed at any time.

[simon_hain]

the native mail application uses this function to resize the list elements if you set the font size to a high value.

[KarlH]

My doc version (Blackberry JDE 4.3.0 API Specification) documents that method, so is it an older version that doesn't document it, or is it removed in a newer version?

[peter_strange]

Interesting, my 4.3 JDE does not include it....

Can you paste in the javadoc description for us all to have a look at?

[KarlH]

file:///C:/Program%20Files/Research%20In%20Motion/BlackBerry%20JDE%204.3.0/docs/api/index.html

net.rim.device.api.ui.component
Class ListField

java.lang.Object
  |
  +--net.rim.device.api.ui.Field
        |
        +--net.rim.device.api.ui.component.ListField

All Implemented Interfaces: AccessibleContext, IComponent, InputMethodListener, VariableRowHeightProvider

Direct Known Subclasses: ObjectListField

...clip...

setRowHeight

public void setRowHeight(int rowHeight)

Sets the height of each row in the list field.

Parameters: rowHeight - Height of each row in the list field. Specifying ROW_HEIGHT_FONT will use the height of the font for this field. If this parameter is negative, it indicates the row height is in multiples of the height of the font for this field.

Throws: IllegalArgumentException - If invalid row height parameter (if zero, or too small proper display of current font).

Am I just lucky, or what??

[simon_hain]

that's the standard method.
the interesting one is setRowHeight(index, rowHeight), which allows to set the height of each row independantly.
and it is not documented, as so many helpful features.