i have implemented the part of code and wrote the main screen class also then i was able to see a blank screen and not the table here is my code.
---------------------------------------------------------------
/*
* GridFieldManagerDemo.java
*
* © <your company here>, 2003-2008
* Confidential and proprietary.
*/
package GridFieldManager;
import net.rim.device.api.system.*;
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.ui.Manager.*;
import net.rim.device.api.ui.container.MainScreen.*;
/**
*
*/
class GridFieldManagerDemo extends UiApplication
{
public static void main(String args[])
{
GridFieldManagerDemo gfmd = new GridFieldManagerDemo();
gfmd.enterEventDispatcher();
}
public GridFieldManagerDemo()
{
pushScreen(new GridFieldScreen());
}
}
---------------------------------------------------------------------------------------------
/*
* GridFieldScreen.java
*
* © <your company here>, 2003-2008
* Confidential and proprietary.
*/
package GridFieldManager;
import net.rim.device.api.system.*;
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.ui.Manager.*;
import net.rim.device.api.ui.container.MainScreen.*;
/**
*
*/
class GridFieldScreen extends MainScreen
{
private int[] columnWidths;
private int columns;
private int allRowHeight = -1;
public GridFieldScreen()
{
super();
setTitle("GridFieldManagerDemo");
GridFieldManager gfm = new GridFieldManager(10,GridFieldManager.USE_ALL_WIDTH);
//GridFieldManager gfm = new GridFieldManager(2,50,GridFieldManager.USE_ALL_WIDTH);
// GridFieldManager gfm = new GridFieldManager(2,GridFieldManager.USE_ALL_WIDTH);
//gfm.navigationMovement(3,2,1,100);
add(gfm);
}
}
---------------------------------------------------------------------------------
/*
* GridFieldManager.java
*
* © <your company here>, 2003-2008
* Confidential and proprietary.
*/
package GridFieldManager;
import net.rim.device.api.system.*;
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.Manager;
public class GridFieldManager extends Manager {
private int[] columnWidths;
private int columns;
private int allRowHeight = -1;
/**
* Constructs a new GridFieldManager with the specified number of columns.
* Rows will be added as needed to display fields.
* Fields will be added to the grid in the order they are added to this manager,
* filling up each row left-to-right:
*
* For example a 2 column manager:
*
* [Field1][Field2]
* [Field3][Field4]
* [Field5]
*
* Column widths are all equal, and the manager will attempt to use all available width.
* The height of each row will be equal to the height of the tallest Field in that row.
* Field positional styles are respected, so fields that are smaller than the row/column
* they are in can be positioned left, right, top bottom, or centered. They default to top left.
*
* @param columns Number of columns in the grid
* @param style
*/
public GridFieldManager(int columns, long style) {
super(style);
this.columns = columns;
}
public GridFieldManager(int[] columnWidths, long style) {
super(style);
this.columnWidths = columnWidths;
this.columns = columnWidths.length;
}
public GridFieldManager(int[] columnWidths, int rowHeight, long style) {
this(columnWidths, style);
this.allRowHeight = rowHeight;
}
protected boolean navigationMovement(int dx, int dy, int status, int time) {
int focusIndex = getFieldWithFocusIndex();
while(dy > 0) {
focusIndex += columns;
if (focusIndex >= getFieldCount()) {
return false; // Focus moves out of this manager
}
else {
Field f = getField(focusIndex);
if (f.isFocusable()) { // Only move the focus onto focusable fields
f.setFocus();
dy--;
}
}
}
while(dy < 0) {
focusIndex -= columns;
if (focusIndex < 0) {
return false;
}
else {
Field f = getField(focusIndex);
if (f.isFocusable()) {
f.setFocus();
dy++;
}
}
}
while(dx > 0) {
focusIndex ++;
if (focusIndex >= getFieldCount()) {
return false;
}
else {
Field f = getField(focusIndex);
if (f.isFocusable()) {
f.setFocus();
dx--;
}
}
}
while(dx < 0) {
focusIndex --;
if (focusIndex < 0) {
return false;
}
else {
Field f = getField(focusIndex);
if (f.isFocusable()) {
f.setFocus();
dx++;
}
}
}
return true;
}
protected void sublayout(int width, int height) {
int y = 0;
if (columnWidths == null) {
columnWidths = new int[columns];
for(int i = 0; i < columns; i++) {
columnWidths[i] = width/columns;
}
}
Field[] fields = new Field[columnWidths.length];
int currentColumn = 0;
int rowHeight = 0;
for(int i = 0; i < getFieldCount(); i++) {
fields[currentColumn] = getField(i);
layoutChild(fields[currentColumn], columnWidths[currentColumn], height-y);
if (fields[currentColumn].getHeight() > rowHeight) {
rowHeight = fields[currentColumn].getHeight();
}
currentColumn++;
if (currentColumn == columnWidths.length || i == getFieldCount()-1) {
int x = 0;
if (this.allRowHeight >= 0) {
rowHeight = this.allRowHeight;
}
for(int c = 0; c < currentColumn; c++) {
long fieldStyle = fields[c].getStyle();
int fieldXOffset = 0;
long fieldHalign = fieldStyle & Field.FIELD_HALIGN_MASK;
if (fieldHalign == Field.FIELD_RIGHT) {
fieldXOffset = columnWidths[c] - fields[c].getWidth();
}
else if (fieldHalign == Field.FIELD_HCENTER) {
fieldXOffset = (columnWidths[c]-fields[c].getWidth())/2;
}
int fieldYOffset = 0;
long fieldValign = fieldStyle & Field.FIELD_VALIGN_MASK;
if (fieldValign == Field.FIELD_BOTTOM) {
fieldYOffset = rowHeight - fields[c].getHeight();
}
else if (fieldValign == Field.FIELD_VCENTER) {
fieldYOffset = (rowHeight-fields[c].getHeight())/2;
}
setPositionChild(fields[c], x+fieldXOffset, y + fieldYOffset);
x += columnWidths[c];
}
currentColumn = 0;
y += rowHeight;
}
if (y >= height) {
break;
}
}
int totalWidth = 0;
for(int i = 0; i < columnWidths.length; i++) {
totalWidth += columnWidths[i];
}
setExtent(totalWidth, Math.min(y, height));
}
}
----------------------------------------------------------------------------------
