Adding static button in a drop-down list
Hi all
I add a list to verticalFieldManager with vertical scrolling function, and in the same crib from the bottom, I need to add a button (after clicking on the button I have to go on the other screen).
Here, my problem is that whenever I scroll the list, the button does not scroll, it should look like the button on the top of the display to scroll and the list in the background. But whenever I scroll the list, list a scroll at the bottom of button.
For more information, I add a screenshot, please find the attachment.
I'd have a play with this, the thought took a little more time than I expected and there are a few "curve balls.
In any case, here's some code that can do what you want. There's some stuff in there, but see how you get on the revision of the code and the doc and the items I gave you to, to see if you can understand what is happening.
Tested on OS 6.0 Simulator 9800, not on anything else.
package mypackage;
import java.util.Vector;
import net.rim.device.api.system.Display;
import net.rim.device.api.ui.Color;
import net.rim.device.api.ui.Font;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.Manager;
import net.rim.device.api.ui.ScrollChangeListener;
import net.rim.device.api.ui.TouchEvent;
import net.rim.device.api.ui.XYRect;
import net.rim.device.api.ui.component.ButtonField;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.component.ListField;
import net.rim.device.api.ui.component.ListFieldCallback;
import net.rim.device.api.ui.component.SeparatorField;
import net.rim.device.api.ui.component.Status;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.container.VerticalFieldManager;
public class StaticButtonTestScreen extends MainScreen implements ListFieldCallback{
private static int NUMBER_OF_ROWS_TO_ADD = 50;
private static int NUMBER_OF_COLUMNS_TO_DISPLAY = 6;
private Vector _listElements = new Vector();
// We use a pretty crude method to supply the items to be displayed
private ListField _listField;
private int _requiredColumnWidth;
StaticButtonTestScreen(){
//! how wide will we make the columns?
Font ourFont = this.getFont();
_requiredColumnWidth = ourFont.getAdvance(" column 8 ");
//! this example has fixed column widths. They do not have to be. Fixed is just simple to demonstrate.
this.add(new LabelField("Above ListField", LabelField.FOCUSABLE));
this.add(new SeparatorField());
//! Add the ListField to a HorizontalFieldMaanger that can scroll horizontally.
//! It is this that does the scrolling for us.
StaticButtonManager myMan = new StaticButtonManager();
//! Note the overridden methods in our ListField.
_listField = new ListField() {
//! OVerride layout so that you get the ListField defined the width that you want.
protected void layout(int maxWidth, int maxHeight) {
int requiredWidth = Math.min(maxWidth, this.getPreferredWidth());
super.layout(requiredWidth, maxHeight);
}
};
VerticalFieldManager vfm = new VerticalFieldManager(Manager.VERTICAL_SCROLLBAR | Manager.VERTICAL_SCROLL);
// Put ListField in here so that it scrolls
_listField.setCallback(this);
_listField.setSize(NUMBER_OF_ROWS_TO_ADD);
// setSearchable(true) so a key stroke will invoke indexOfList(). Try it
_listField.setSearchable(true);
for(int count = 0; count < NUMBER_OF_ROWS_TO_ADD; ++count) {
String listItem = Integer.toString(count) + ".";
_listElements.insertElementAt(listItem, count);
}
vfm.add(_listField);
myMan.add(vfm);
ButtonField bf = new SpecialButtonField("test");
myMan.add(bf);
this.add(myMan);
this.add(new SeparatorField());
this.add(new LabelField("Below ListField", LabelField.FOCUSABLE));
}
// Following methods are required by the ListFieldCallback interface
public void drawListRow(ListField listField, Graphics graphics, int index, int y, int width) {
int columnWidth = width/NUMBER_OF_COLUMNS_TO_DISPLAY;
//! Use the width that we have, not the width we requested.
//! There is a chance that they might be different, though I suspect this would only
//! be seen during development when perhaps changes have not be made consistently.
int xpos = 0;
// First column test data supplied from program
String suppliedData = (String) this.get(listField, index);
graphics.setColor(Color.BLACK);
graphics.drawText(suppliedData, xpos, y);
xpos += columnWidth;
// Dummy up the other columns.....
graphics.setColor(Color.RED);
for ( int i = 1; i < NUMBER_OF_COLUMNS_TO_DISPLAY; i++ ) {
graphics.drawText("c" + Integer.toString(i), xpos, y);
xpos += columnWidth;
}
}
public Object get(ListField listField, int index) {
return _listElements.elementAt(index);
}
//! In theory, the "framework" can call this, so it should return the same
//! value as the overridden getPreferredWidth(). But my testing suggests this is
//! is actually never called. But for consistency, set it correctly!
public int getPreferredWidth(ListField litfield) {
return _requiredColumnWidth * NUMBER_OF_COLUMNS_TO_DISPLAY;
}
// People don't know how to use this, so I'm coding this up as an example
// In the sample code you can use the digits to find things...
public int indexOfList(ListField listField, String prefix, int start) {
// Search from where we currently are forward.
for ( int i = start; i < _listElements.size(); i++ ) {
String element = (String) this.get(listField, i);
if ( element != null && prefix != null ) {
// Just being careful
if ( element.startsWith(prefix) ) {
return i;
}
}
}
// Not found, search from beginning to where we are currently
for ( int i = 0; i < start; i++ ) {
String element = (String) this.get(listField, i);
if ( element != null && prefix != null ) {
// Just being careful
if ( element.startsWith(prefix) ) {
return i;
}
}
}
// Didn't find it, don't move....
return start;
}
// Special Manager so that we can overlay the Fields
// and because the standard optimised paint does not
// cope with this, we need to invalidate() the Field on scroll to get
// it repainted.
// We also have a bit of work around
class StaticButtonManager extends Manager implements ScrollChangeListener {
// Implement ScrollChangeListener so tha on a scroll, we repaint
// because the default action is optimised and does not cope
// with the overlaid Fields.
boolean scrollListenerSet = false;
SpecialButtonField bf = null;
XYRect ourExtent = new XYRect();
public StaticButtonManager() {
super(Manager.NO_VERTICAL_SCROLL | Manager.USE_ALL_HEIGHT);
}
// Override paintBackground just so we can see the extent of this Manager
// Not necessary, just done to make it easier to see.
public void paintBackground(Graphics g) {
int currentBackgroundColor = g.getBackgroundColor();
try {
g.setBackgroundColor(0X00CCCCCC);
g.clear();
} finally {
g.setBackgroundColor(currentBackgroundColor);
}
}
// Only expect two Fields
// 1) A VFM which will scroll to handle the ListField
// 2) A button that we will stuck at the bottom right
protected void sublayout(int maxWidth, int maxHeight) {
maxHeight = Display.getHeight()/2;
// Set the Height that the ListField will use when scrolling.
if ( this.getFieldCount() != 2 ) {
throw new RuntimeException("Incorrect number of Fields added");
}
VerticalFieldManager listFieldManager = (VerticalFieldManager) this.getField(0);
if ( !scrollListenerSet ) {
scrollListenerSet = true;
listFieldManager.setScrollListener(this);
}
super.layoutChild(listFieldManager, maxWidth, maxHeight);
super.setPositionChild(listFieldManager, 0, 0);
if ( listFieldManager.getHeight() < maxHeight ) {
maxHeight = listFieldManager.getHeight();
}
bf = (SpecialButtonField) this.getField(1);
super.layoutChild(bf, maxWidth, maxHeight);
super.setPositionChild(bf, maxWidth - bf.getWidth(), maxHeight - bf.getHeight());
setExtent(maxWidth, maxHeight);
}
public void scrollChanged(Manager manager, int newHorizontalScroll, int newVerticalScroll) {
this.invalidate(); // repaint everything....
}
/*
* Might be needed, comment out code just in case
public int getFieldAtLocation(int x, int y) {
if ( x >= this.getWidth() - bf.getWidth() &&
y >= this.getHeight() - bf.getHeight() ) {
return 1;
}
return super.getFieldAtLocation(x, y);
}
*/
// Just used to allow the user to use the trackpad to go horizontally and select the button.
// Not really needed
protected boolean navigationMovement(int dx, int dy, int status, int time) {
boolean buttonInFocus = bf.isFocus();
if ( dx > 0 && !buttonInFocus ) {
bf.setFocus();
return true;
} else
if ( dx < 0 && buttonInFocus ) {
this.getField(0).setFocus();
return true;
}
return super.navigationMovement(dx, dy, status, time);
}
// Because the Button keeps moving in relation t the manager
// and the manager does not expect this,
// We have to check the touch location ourselves
protected boolean touchEvent(TouchEvent message) {
int x = message.getX( 1 );
int y = message.getY( 1 );
getExtent(ourExtent);
if( x < 0 || y < 0 || x > ourExtent.width || y > ourExtent.height ) {
// Outside the field
return false;
}
if ( x >= ourExtent.width - bf.getWidth() &&
y >= ourExtent.height - bf.getHeight() ) {
bf.onClick();
return true;
}
return false;
}
}
// Special Button so that the Button can be clicked from the
// Manager's touchEvent
class SpecialButtonField extends ButtonField {
public SpecialButtonField(String label) {
super(label);
}
protected boolean navigationClick( int status, int time ) {
onClick();
return true;
}
public void onClick() {
Status.show("Clicked: " + Integer.toString(_listField.getSelectedIndex()));
}
}
}
Tags: BlackBerry Developers
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on the other
{
_logger.info ("reset fields: CompID =" + uiComp.getId ());
}
Pass the component inside the uniforms, UIXForm, UIXSubform, UIXRegion, UIXPopup, RichCarousel
or RichPanelCollection that contains the components to reset
getTextIDLOV () .setValue (null);
ResetUtils.reset (uiComp);
}
---
Using this code Iam able to clear the entrance to the text box but can not clear previously selected items from the drop-down lists when the reset button is clicked
Can anyone please help on this issue.
It's simple, you can set GenerateIsNullClauseForBindVars = "false" in the viewCriteria who created in EmployeeView
After doing that it will fill the list of employees only after the Department selection
Again check the enclosed application
Ashish
-
Help adding textfield with drop-down list selects
I have a PDF with a drop-down list field called "SoftwareList" with a default value of "Select the software" and a text field called 'SelectedSoftware '. You can freely type in the text field to communicate your needs, or choose the menu drop-down. I want to add in the text field, which is selected in the drop-down list each time. I had the following script to fix this as a custom text field calculation script:
If (this.getField("SoftwareList").value! = "Select software")
{
this.getField("SelectedSoftware").value += this.getField("SoftwareList").value + «»
}
The problem I have is that it will continue to add to the text box with everything that was selected last in the drop-down list when you click on other fields in the form, such as check boxes. I tried this put on different actions both at the key sequence in the Properties tab of format, but did not work there. I added the following line, which helped, but it is still a click of the addition until it changes, duplicate the last pick:
this.getField("SoftwareList").value = "select the software."
Appreciate help with this.
I would like to use the script validation custom from the drop-down list. You can use something like this:
If (event.value! = 'Select Software') this.getField("SelectedSoftware").value += event.value + ",";
To ensure that the update as soon as a selection is made to check the option to validate the selected value immediately under properties of the menu drop down, tab Options.
-
Data from the field drop-down list does not clear when the reset button is activated
Acrobat Pro XI
All field boxes are checked in the tab properties of the button actions... but when I click on the reset button of the form I created only the data in clear text fields, not any of the data that has been selected in a drop-down list. What I am doing wrong?
The 'rest shape' command returns the fields to their default values. If this
value is not empty, that's what he'll be back.
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