| icess | 02-27-2009 12:20 AM |
the full code : Code:
package hs.bb;
import net.rim.device.api.system.KeypadListener;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.Font;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.XYRect;
import net.rim.device.api.ui.container.MainScreen;
public class TestScreen extends MainScreen {
public TestScreen() {
this.setTitle("Test Table Field");
String[] header = {"header one","header two","header three"};
String[][] value = {{"value 1 1","value 1 2","value 1 3"},{"value 1 1","value 1 2","value 1 3"},{"value 1 1","value 1 2","value 1 3"},{"value 1 1","value 1 2","value 1 3"},{"value 1 1","value 1 2","value 1 3"},{"value 1 1","value 1 2","value 1 3"},{"value 1 1","value 1 2","value 1 3"},{"value 1 1","value 1 2","value 1 3"},{"value 2 1","value 2 2","value 2 3"},{"value 3 1","value 3 2","value 3 3"}};
TableField st = new TableField(header,value,Field.FOCUSABLE);
add(st);
}
public class TableField extends Field {
private int fontColor = 0x0;
private int focusLineColor = 0xFFFFFF;
private int[] columnWidths;
private Font valueFont;
private Font headerFont;
private int headerColor = 0xFFF000;
private int headerBgColor = 0x444444;
private int headerHeight;
private int selectedRowIndex = -1;
private int selectedColumnIndex = -1;
private String[] headers;
private String[][] values;
private int rowPadding = 3;
private int columnPadding = 3;
private int horizontalPadding = 5;
private int verticalPadding = 5;
private int rowHeight;
private int colNum;
private int rowNum;
public TableField(String[] headers,String[][] values,long style ) {
super(style);
if(headers != null && headers.length > 0) {
this.headers = headers;
headerFont = Font.getDefault();
headerHeight = headerFont.getHeight()+rowPadding;
}
this.values = values;
this.valueFont = Font.getDefault();
rowHeight = this.valueFont.getHeight()+rowPadding;
this.rowNum = values.length;
this.colNum = values[0].length;
int tw = 0;
columnWidths = new int[colNum];
for (int i = 0; i < colNum; i++) {
for (int j = 0; j < rowNum; j++) {
tw = valueFont.getAdvance(values[j][i]);
if(tw > columnWidths[i]) {
columnWidths[i] = tw;
}
}
}
}
protected void layout(int width, int height) {
int pw = getPreferredWidth();
if(pw < width) {
pw = (width - pw)/this.colNum;
for (int i = 0; i < colNum; i++) {
columnWidths[i] += pw;
}
}
setExtent(width, getPreferredHeight());
}
private int xoffset = 0;
protected void paint(Graphics g) {
int x = horizontalPadding;
int y = verticalPadding;
if(headers != null && headers.length > 0) {
if(headerBgColor != -1) {
g.setColor(headerBgColor);
g.fillRect(0, 0, getWidth(), verticalPadding+headerHeight);
}
if(headerColor != -1) {
g.setColor(headerColor);
}
for (int i = 0; i < colNum; i++) {
g.drawText(headers[i], x+xoffset, y);
x += columnWidths[i] + columnPadding;
}
y+= headerHeight;
}
x = horizontalPadding;
if(values != null && values.length > 0) {
if(fontColor != -1) {
g.setColor(fontColor);
}
for (int i = 0; i < colNum; i++) {
int vy = y;
for (int j = 0; j < rowNum; j++) {
g.drawText(values[j][i], x+xoffset, vy);
vy += rowHeight;
}
x+=columnWidths[i]+columnPadding;
}
}
//paint focus row line
if(focusLineColor != -1 && isFocus()) {
g.setColor(focusLineColor);
int fly = y + rowHeight * (selectedRowIndex+1)-rowPadding/2;
g.drawLine(0, fly, getWidth(), fly);
}
g.setColor(fontColor);
g.drawRect(0, 0, getWidth(), getHeight());
}
public void getFocusRect(XYRect rect) {
rect.set(0, verticalPadding+headerHeight+rowHeight*selectedRowIndex, getWidth(), rowHeight);
}
protected int moveFocus(int amount, int status, int time) {
//TODO how to implement this method?
return super.moveFocus(amount, status, time);
}
protected boolean navigationMovement(int dx, int dy, int status, int time) {
if ((status&KeypadListener.STATUS_FOUR_WAY) == KeypadListener.STATUS_FOUR_WAY) {
if (dx > 0) {
xoffset -= 10;
invalidate();
return true;
} else if (dx < 0) {
xoffset += 10;
invalidate();
if(xoffset > 0) {
xoffset = 0;
return true;
}
} else if (dy > 0) {
if(selectedRowIndex < this.rowNum) {
selectedRowIndex ++;
if(selectedRowIndex == rowNum) {
selectedRowIndex = rowNum-1;
return false;
}
invalidate();
return true;
}
} else if (dy < 0) {
if(selectedRowIndex > 0) {
selectedRowIndex --;
if(selectedRowIndex < 0) {
selectedRowIndex = 0;
return false;
}
invalidate();
return true;
}
}
}
return super.navigationMovement(dx, dy, status, time);
}
protected void onFocus(int direction) {
if(selectedRowIndex == -1) {
selectedRowIndex = 0;
}
super.onFocus(direction);
}
protected void onUnfocus() {
super.onUnfocus();
invalidate();
}
public int getPreferredHeight() {
return headerHeight+(rowHeight*rowNum)+(verticalPadding<<1);
}
public int getPreferredWidth() {
int w = 0;
for (int i = 0; i < colNum; i++) {
w += columnWidths[i]+columnPadding;
}
if(w > 0) w -= columnPadding;
w += (horizontalPadding<<1);
return w;
}
}
}
when the selected row is outside the screen , how to scroll the screen to dispaly the row? |
