This document describes a Javabean that allows displaying a Jslider component in an Oracle Forms application. The Javabean handles displaying the slider, setting properties like background color, and firing events when the slider value changes. It provides methods to initialize the slider, set properties like value, and get the current value. The sample Forms application demonstrates using the bean by initializing slider properties and handling value change events.

1. Jslider - Francois Degrelle
Oracle Forms – Javabean
A Jslider in your application
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1. Purpose
This bean allows to display a Jslider component in your Forms application.
2. The Javabean
package oracle.forms.fd;
import java.awt.*;
import java.awt.event.*;
import java.util.StringTokenizer;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import oracle.forms.ui.CustomEvent;
import oracle.forms.ui.VBean;
import oracle.forms.handler.IHandler;
import oracle.forms.properties.ID;
/**
* A javabean to display Sliders in Forms
*
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2. Jslider - Francois Degrelle
* @author Francois Degrelle
* @version 1.0
*/
public class Slider extends VBean implements ChangeListener
{
public final static ID SetBG = ID.registerProperty("SETBGCOLOR");
public final static ID SetFG = ID.registerProperty("SETFGCOLOR");
public final static ID ValueChanged = ID.registerProperty("VALUECHANGED");
public final static ID SetBounds = ID.registerProperty("SETBOUNDS");
public final static ID SetValue = ID.registerProperty("SETVALUE");
public final static ID GetValue = ID.registerProperty("GETVALUE");
private IHandler m_handler;
static int iValue = 0 ; // current value variable
protected JSlider slide ; // Slider pointer
protected Color BGcolor, FGcolor ; // Slider colors
public Slider()
{
super();
// create a new JSlider
slide = new JSlider();
slide.addChangeListener(this);
slide.setPaintTrack(true);
slide.setPaintTicks(true);
slide.setPaintLabels(true);
add(slide);
}
// Fires when the JSlider is modified
public void stateChanged(ChangeEvent e) {
JSlider source = (JSlider)e.getSource();
if (!source.getValueIsAdjusting()) {
iValue = (int)source.getValue();
// Dispatch event
CustomEvent ce = new CustomEvent(m_handler, ValueChanged);
dispatchCustomEvent(ce);
}
}
public void init(IHandler handler)
{
m_handler = handler;
super.init(handler);
}
public boolean setProperty(ID property, Object value)
{
if (property == SetBG) // Set the background color
{
String color = value.toString().trim();
System.out.println("BG="+color) ;
int c=0, i=0, r=0, g=0, b=0 ;
StringTokenizer st = new StringTokenizer(color,",");
while (st.hasMoreTokens()) {
c = new Integer((String)st.nextToken()).intValue() ;
if( i == 0) r = c;
if( i == 1 ) g = c ;
if( i == 2 ) b = c ;
i++;
}
BGcolor = new Color(r,g,b);
slide.setBackground(BGcolor);
return true;
}
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3. Jslider - Francois Degrelle
else if (property == SetFG) // Set the foreground color
{
String color = value.toString().trim();
System.out.println("FG="+color) ;
int c=0, i=0, r=0, g=0, b=0 ;
StringTokenizer st = new StringTokenizer(color,",");
while (st.hasMoreTokens()) {
c = new Integer((String)st.nextToken()).intValue() ;
if( i == 0) r = c;
if( i == 1 ) g = c ;
if( i == 2 ) b = c ;
i++ ;
}
FGcolor = new Color(r,g,b);
slide.setForeground(FGcolor);
return true;
}
else if (property == SetBounds) // Set the properties
{
String sBounds = value.toString().trim();
int c=0, i=1 ;
StringTokenizer st = new StringTokenizer(sBounds,",");
while (st.hasMoreTokens()) {
if( i == 1)
{
if ( st.nextToken().equals("H"))
slide.setOrientation(JSlider.HORIZONTAL);
else
slide.setOrientation(JSlider.VERTICAL);
}
else
{
c = new Integer((String)st.nextToken()).intValue() ;
if( i == 2) slide.setMinimum(c);
if( i == 3 ) slide.setMaximum(c);
if( i == 4 ) slide.setMajorTickSpacing(c);
if( i == 5 ) slide.setMinorTickSpacing(c);
}
i++;
}
return true;
}
else if (property == SetValue) // Set the current value
{
slide.setValue(new Integer((String)value).intValue() );
return true;
}
else
{
return super.setProperty(property, value);
}
}
/**
* Get the current value
**/
public Object getProperty(ID pId)
{
if (pId == GetValue)
{
return "" + iValue ;
}
else
{
return super.getProperty(pId);
}
}
}
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4. Jslider - Francois Degrelle
3. Forms configuration
Copy the Slider.jar file in the /forms/java directory
Edit the /forms/server/formsweb.cfg file to add the jar file to the archive_jini variable
archive_jini=f90all_jinit.jar,……, Slider.jar
4. How to implement this bean in your own form
Open your form
Add a Javabean component to any block
Set its Implementation class property to oracle.forms.fd.Slider
Eventually, set the Backgroud and/or the foreground color
5. The properties that can be sent to the bean
The background color of the slider
Set_Custom_Property( BEAN_NAME, BEAN_NUMBER, 'SETBGCOLOR', 'rgb_color' ) ;
e.g.
Set_Custom_Property('BLK.ITEM_BEAN', 1, 'SETBGCOLOR', '255,0,255' ) ;
Information about the background property
If the background color of the bean is not setted, we use the canvas background color property.
If the canvas background color property is not setted, we have to know what colorscheme is currently in
use
There is a package in the SLIDER.FMB module that store the RGB values for each colorscheme
-- Colorscheme RGB values --
GC$Teal Varchar2(15) := '115,142,140' ;
GC$Titanium Varchar2(15) := '99,101,99' ;
GC$Red Varchar2(15) := '156,130,123' ;
GC$Khaki Varchar2(15) := '140,142,123' ;
GC$Blue Varchar2(15) := '90,117,148' ;
GC$Olive Varchar2(15) := '107,113,99' ;
GC$Purple Varchar2(15) := '123,113,140' ;
GC$Blaf Varchar2(15) := '247,247,231' ;
-- Current colorscheme --
GC$CurScheme Varchar2(15) := '' ;
In the case of the use of a colorscheme, you have to indicate it as soon as possible (in a When-New-
Form-Instance trigger)
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5. Jslider - Francois Degrelle
-- ColorScheme used ? --
PKG_SLIDER.GC$CurScheme := PKG_SLIDER.GC$Blaf ;
In this example, i used the blaf colorscheme
The foreground color of the slider
Set_Custom_Property( BEAN_NAME, BEAN_NUMBER, 'SETFGCOLOR', 'rgb_color' ) ;
e.g.
Set_Custom_Property('BLK.ITEM_BEAN', 1, 'SETFGCOLOR', '0,0,0' ) ;
The properties of the slider
Set_Custom_Property( BEAN_NAME, BEAN_NUMBER, 'SETBOUNDS', PROPERTIES ) ;
Where properties are:
Orientation : could be H for a horizontal slider or V for a vertical slider
Max Value : the maximum value for the slider
Min Value : the minimum value for the slider
MajorTick : distance betwwen each principal graduations
MinorTick : distance betwwen each secondary graduations
e.g.
Set_Custom_Property('BLK.ITEM_BEAN', 1, 'SETBOUNDS', ' H,0,10,2,1 ' ) ;
The current value of the slider
Set_Custom_Property( BEAN_NAME, BEAN_NUMBER, 'SETVALUE', 'value' ) ;
e.g.
Set_Custom_Property('BLK.ITEM_BEAN', 1, 'SETVALUE', '5' ) ;
6. The properties that can be read from the bean
The current value of the slider
CHAR := Get_Custom_Property( BEAN_NAME, BEAN_NUMBER, 'GETVALUE' ) ;
e.g.
Value := Get_Custom_Property('BLK.ITEM_BEAN', 1, 'GETVALUE' ) ;
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6. Jslider - Francois Degrelle
7. The sample dialog
Download the jslider.zip file
Unzip the jslider.zip file
Copy the Slider.jar file in your /forms/java/ directory
Edit your /forms/server/formsweb.cfg file
Open the SLIDER.fmb module (Oracle Forms 10.1.2)
Compile all and run the module
The settings of the slider properties are grouped in the PKG_SLIDER package
PACKAGE PKG_SLIDER IS
-- Colorscheme RGB values --
GC$Teal Varchar2(15) := '115,142,140' ;
GC$Titanium Varchar2(15) := '99,101,99' ;
GC$Red Varchar2(15) := '156,130,123' ;
GC$Khaki Varchar2(15) := '140,142,123' ;
GC$Blue Varchar2(15) := '90,117,148' ;
GC$Olive Varchar2(15) := '107,113,99' ;
GC$Purple Varchar2(15) := '123,113,140' ;
GC$Blaf Varchar2(15) := '247,247,231' ;
-- Current colorscheme --
GC$CurScheme Varchar2(15) := '' ;
PROCEDURE Init_Slider
(
PC$Name IN VARCHAR2,
PN$Num IN PLS_INTEGER,
PC$Bounds IN VARCHAR2
) ;
PROCEDURE Set_Value
(
PC$Name IN VARCHAR2,
PN$Num IN PLS_INTEGER,
PN$Value IN NUMBER
) ;
END;
PACKAGE BODY PKG_SLIDER IS
PROCEDURE Init_Slider
(
PC$Name IN VARCHAR2,
PN$Num IN PLS_INTEGER,
PC$Bounds IN VARCHAR2
)
Is
LC$CVBColor Varchar2(20) := Get_Canvas_Property( Get_Item_Property( PC$Name, ITEM_CANVAS ),
BACKGROUND_COLOR ) ;
LC$CVFColor Varchar2(20) := Get_Canvas_Property( Get_Item_Property( PC$Name,
ITEM_CANVAS ), FOREGROUND_COLOR ) ;
LC$BGColor Varchar2(20) := Get_Item_Property(PC$Name, BACKGROUND_COLOR) ;
LC$FGColor Varchar2(20) := Get_Item_Property(PC$Name, FOREGROUND_COLOR) ;
LC$Color Varchar2(15) ;
Begin
-- BackGround color --
If LC$BGColor is not null Then
LC$Color := Translate( LC$BGColor, '0123456789gbr','0123456789,,' ) ;
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7. Jslider - Francois Degrelle
Set_Custom_Property( PC$Name, PN$Num, 'SETBGCOLOR', LC$Color ) ;
Elsif LC$CVBColor is not null Then
LC$Color := Translate( LC$CVBColor, '0123456789gbr','0123456789,,' ) ;
Set_Custom_Property( PC$Name, PN$Num, 'SETBGCOLOR', LC$Color ) ;
Else
LC$Color := PKG_SLIDER.GC$CurScheme ;
Set_Custom_Property( PC$Name, PN$Num, 'SETBGCOLOR', LC$Color ) ;
End if ;
-- ForeGround color --
If LC$FGColor is not null Then
LC$Color := Translate( LC$FGColor, '0123456789gbr','0123456789,,' ) ;
Set_Custom_Property( PC$Name, PN$Num, 'SETFGCOLOR', LC$Color ) ;
Elsif LC$CVFColor is not null Then
LC$Color := Translate( LC$CVFColor, '0123456789gbr','0123456789,,' ) ;
Set_Custom_Property( PC$Name, PN$Num, 'SETBGCOLOR', LC$Color ) ;
End if ;
-- Bounds --
Set_Custom_Property( PC$Name, PN$Num, 'SETBOUNDS', PC$Bounds ) ;
End ;
-------------------------------------------
-- Set the current value of the Slider --
-------------------------------------------
PROCEDURE Set_Value
(
PC$Name IN VARCHAR2,
PN$Num IN PLS_INTEGER,
PN$Value IN NUMBER
)
IS
BEGIN
-- Initial value --
Set_Custom_Property( PC$Name, PN$Num, 'SETVALUE', To_Char(PN$Value) ) ;
End Set_Value;
END;
So, in the When-New-Form-Instance trigger, you can set the slider settings:
-- ColorScheme used ? --
PKG_SLIDER.GC$CurScheme := PKG_SLIDER.GC$Blaf ;
-- Init the slider properties --
PKG_SLIDER.Init_Slider ( 'BL1.BEAN_SLIDER', 1, 'H,0,10,2,1' ) ;
-- Set current the value --
PKG_SLIDER.Set_Value ( 'BL1.BEAN_SLIDER', 1, 5 ) ;
And get the current value with the When-Custom-Item-Event trigger created on the bean item:
-- Get new value --
:BL1.VAL := Get_Custom_Property( 'BL1.BEAN_SLIDER', 1, 'GETVALUE') ;
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