PJC, Set_Custom_Property problem

Question

I'm trying to use a PJC in a multi-record block to set the colour of a field depending on the data, but have run into a problem.
I can't find documentation for Set_Custom_Property but I always assumed that the second parameter referred to the record in the dataset, like in Set_Item_Instance_Property. It appears that the parameter might actually refer to the row in the physical block (unless my code's wrong), so setting the property for 'record' 11 in a block with 10 rows displayed gives a FRM-40741 error (unable to locate record <no> on block <block name>). Setting the colour of the 9th row is OK but when the data scrolls the colour stays put.
Does anyone know for sure what the parameters are, or have any decent documentation for pjc-related stuff, especially API's (google displays only 20 results for "oracle forms ui vtextfield")?
The code:package pjcs;
import oracle.forms.ui.VTextField;
import oracle.forms.properties.ID;
import java.awt.Color;
public class ColorTextItem extends VTextField {
  public static final ID FG_COLOR = ID.registerProperty("FG_COLOR");
  public static final ID BG_COLOR = ID.registerProperty("BG_COLOR");
  public ColorTextItem() {
    super();
  // expects r,g,b values separated by commas
  public Color getColor(String colourValue) {
    try{
      int r,g,b;
      int rPos, gPos;
      rPos = colourValue.indexOf(",");
      gPos = colourValue.indexOf(",", rPos + 1);
      if (rPos < 1 || gPos < 1 || gPos + 1 == colourValue.length()) {
        throw new Exception("Invalid colour");
      r = Integer.parseInt(colourValue.substring(0, rPos));
      g = Integer.parseInt(colourValue.substring(rPos + 1, gPos));
      b = Integer.parseInt(colourValue.substring(gPos + 1));
      if (r < 0 || r > 255 || g < 0 || g > 255 || b < 0 || b > 255) {
        throw new Exception("Invalid colour");
      return new Color(r,g,b);
    } catch(Exception e) {
      return new Color(0,0,0);
  public boolean setProperty(ID id, Object value) {
    if (id == FG_COLOR)
      this.setForeground(getColor(value.toString()));
      return true;
    if (id == BG_COLOR)
      this.setBackground(getColor(value.toString()));
      return true;
    return super.setProperty(id,value);
}This thread is for PJCs, please post any alternative solutions to the colours problem here:
Re: Colours controlled by user.

Answer 1

I can't find documentation for Set_Custom_Property
but I always assumed that the second parameter
referred to the record in the dataset, like in
Set_Item_Instance_Property. I can't find anything specific for it - other than the PJC info in forms help. (Serach on SET_CUSTOM_PROPERTY in the SEARCH tab).
Are there any Oracle PJC demos that do this?
It appears that the
parameter might actually refer to the row in the
physical block (unless my code's wrong), so setting
the property for 'record' 11 in a block with 10 rows
displayed gives a FRM-40741 error (unable to locate
record <no> on block <block name>). Setting the
colour of the 9th row is OK but when the data scrolls
the colour stays put.Ok - I would expect this. Your setting the field, not the record.
I would think that some sort of trigger that goes through the data
in the block that is displayed on the screen everytime the scroll bar
changes would then update current view with your code. I think
you'd have to catch cursor down/up too..and maybe a few others.
Does anyone know for sure what the parameters are, or
have any decent documentation for pjc-related stuff,
especially API's (google displays only 20 results for
"oracle forms ui vtextfield")?Not sure what depth of information you are looking for - but this might be a start:
Start up Oracle JDeveloper.
File->New, Client Tier->Java Beans, Item->PJC, Next
Extends->orace.forms.ui.vTextField, OK
Right click, class editor, then properties
This shows all the properites, and then you can display the inherited fields.