/*
* SpeedBumpScreen.java
*
* Copyright � 1998-2011 Research In Motion Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Note: For the sake of simplicity, this sample application may not leverage
* resource bundles and resource strings. However, it is STRONGLY recommended
* that application developers make use of the localization features available
* within the BlackBerry development platform to ensure a seamless application
* experience across a variety of languages and geographies. For more information
* on localizing your application, please refer to the BlackBerry Java Development
* Environment Development Guide associated with this release.
*/
package com.rim.samples.device.ui.uitoolkitdemo;
import net.rim.device.api.system.Bitmap;
import net.rim.device.api.system.Display;
import net.rim.device.api.ui.Adjustment;
import net.rim.device.api.ui.Color;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.ScrollView;
import net.rim.device.api.ui.component.BitmapField;
import net.rim.device.api.ui.container.HorizontalFieldManager;
import net.rim.device.api.ui.container.MainScreen;
/**
* This class demonstrates how the Adjustment class can be used to create
* "speed bumps" within a Manager. Three bitmaps, each representing a "page",
* are added to a scrollable horizontal manager. An Adjustment object is used to
* control the amount of horizontal movement required before the manager will
* actually scroll to the adjacent page.
*/
public final class SpeedBumpScreen extends MainScreen {
private static final int ARC_WIDTH = 80;
private static final int ARC_HEIGHT = 80;
private static final int ROUND_RECT_WIDTH_PAD = 20;
private static final int ROUND_RECT_HEIGHT_PAD = 40;
/**
* Creates a new SpeedBumpScreen object
*/
public SpeedBumpScreen() {
super(ScrollView.NO_VERTICAL_SCROLL);
setTitle("Speed Bump Screen");
final int displayWidth = Display.getWidth();
final int displayHeight = Display.getHeight();
// Create scrollable manager to contain pages
final HorizontalFieldManager manager =
new HorizontalFieldManager(ScrollView.HORIZONTAL_SCROLL);
// Create three pages inside the manager
for (int i = 0; i < 3; i++) {
final Bitmap bitmap = new Bitmap(displayWidth, displayHeight);
final Graphics g = Graphics.create(bitmap);
g.setBackgroundColor(Color.BLACK);
g.clear();
g.setColor(Color.ALICEBLUE);
g.fillRoundRect(10, 10, displayWidth - ROUND_RECT_WIDTH_PAD,
displayHeight - ROUND_RECT_HEIGHT_PAD, ARC_WIDTH,
ARC_HEIGHT);
g.setColor(Color.DARKGRAY);
g.drawText(Integer.toString(i), displayWidth / 2, displayHeight / 2);
final BitmapField field = new BitmapField(bitmap);
manager.add(field);
}
// Initialize Adjustment
final Adjustment adjustment = manager.getHorizontalAdjustment();
adjustment.setPageSize(displayWidth);
// Set page step so that pages must be moved 1/4 of their
// width for the screen to scroll to the adjacent page.
adjustment.setPageStep(Display.getWidth() / 4);
add(manager);
}
}