Blackberry JAVA DEVELOPMENT ENVIRONMENT - - CRYPTOGRAPHIC SMART CARD DRIVER - DEVELOPMENT GUIDE Průvodce řešením problémů stáhnout pdf (Strana 31)

1: Creating UIs

package com.rim.samples.docs.custommenu;

import net.rim.device.api.system.*;

import net.rim.device.api.ui.container.*;

import net.rim.device.api.ui.*;

import net.rim.device.api.ui.component.*;

class DiagonalManager extends Manager {

public DiagonalManager(long style) {

super(style);

}

public int getPreferredWidth() {

int width = 0;

int numberOfFields = getFieldCount();

for (int i=0; i<numberOfFields; ++i) {

width += getField(i).getPreferredWidth();

}

return width;

}

public int getPreferredHeight() {

int height = 0;

int numberOfFields = getFieldCount();

for (int i=0; i<numberOfFields; ++i) {

height += getField(i).getPreferredHeight();

}

return height;

}

protected void sublayout(int width, int height) {

int x = 0;

int y = 0;

Field field;

int numberOfFields = getFieldCount();

for (int i=0; i<numberOfFields; ++i) {

field = getField(i);

layoutChild( field, width, height );

setPositionChild(field, x, y);

x += field.getPreferredWidth();

y += field.getPreferredHeight();

}

setExtent(width,height);

}

protected int nextFocus(int direction, boolean alt) {

int index = this.getFieldWithFocusIndex();

if(alt) {

if(direction < 0) {

// action to perform if trackwheel is rolled up

} else {

// action to perform if trackwheel is rolled down

}

if (index == this.getFieldWithFocusIndex()) {

return super.nextFocus(direction, alt);

} else {

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