/**
* PictureScrollFieldDemoScreen.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.picturescrollfielddemo;
import net.rim.device.api.system.Bitmap;
import net.rim.device.api.ui.Color;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.FieldChangeListener;
import net.rim.device.api.ui.Screen;
import net.rim.device.api.ui.TouchEvent;
import net.rim.device.api.ui.Touchscreen;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.CheckboxField;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.component.ObjectChoiceField;
import net.rim.device.api.ui.component.SeparatorField;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.decor.BackgroundFactory;
import net.rim.device.api.ui.extension.component.PictureScrollField;
import net.rim.device.api.ui.extension.component.PictureScrollField.HighlightStyle;
import net.rim.device.api.ui.extension.component.PictureScrollField.ScrollEntry;
/**
* The main screen class for the the Picture Scroll Field Demo application
*/
public final class PictureScrollFieldDemoScreen extends MainScreen implements
FieldChangeListener {
private static final String CALL_OUT_TEXT = "Call-out ";
private static final int NUM_ENTRIES = 4;
private final PictureScrollField _pictureScrollField;
private boolean _overlap;
private final CheckboxField _centerLensCheckBox;
private final CheckboxField _overlapCheckBox;
private final ObjectChoiceField _choiceField;
private final Bitmap[] _bitmaps;
/**
* Creates a new PictureScrollFieldDemoScreen object
*/
public PictureScrollFieldDemoScreen() {
setTitle("Picture Scroll Field Demo");
// Initialize an array of Bitmaps
_bitmaps = new Bitmap[NUM_ENTRIES];
_bitmaps[0] = Bitmap.getBitmapResource("berry.jpg");
_bitmaps[1] = Bitmap.getBitmapResource("logo_blue.jpg");
_bitmaps[2] = Bitmap.getBitmapResource("logo_black.jpg");
_bitmaps[3] = Bitmap.getBitmapResource("building.jpg");
// Initialize an array of scroll entries
final ScrollEntry[] entries = new ScrollEntry[NUM_ENTRIES];
entries[0] =
new ScrollEntry(_bitmaps[0], "BlackBerry", CALL_OUT_TEXT + 1);
entries[1] =
new ScrollEntry(_bitmaps[1], "Blue logo", CALL_OUT_TEXT + 2);
entries[2] =
new ScrollEntry(_bitmaps[2], "Black logo", CALL_OUT_TEXT + 3);
entries[3] =
new ScrollEntry(_bitmaps[3], "Building", CALL_OUT_TEXT + 4);
// Initialize the picture scroll field
_pictureScrollField = new PictureScrollField(150, 100);
_pictureScrollField.setData(entries, 0);
_pictureScrollField.setHighlightStyle(HighlightStyle.ILLUMINATE);
_pictureScrollField.setHighlightBorderColor(Color.RED);
_pictureScrollField.setBackground(BackgroundFactory
.createSolidBackground(Color.LIGHTBLUE));
_pictureScrollField.setLabelsVisible(true);
_pictureScrollField.setLensShrink(0.4f);
add(_pictureScrollField);
// Initialize a choice field for highlight style selection
final String[] choices =
new String[] { "No highlight", "Illuminate",
"Illuminate with round border",
"Illuminate with square border", "Square border",
"Magnify lens", "Shrink lens",
"Illuminate with magnify lens",
"Illuminate with shrink lens" };
add(new SeparatorField());
add(new LabelField("Select highlight style", Field.FIELD_HCENTER));
_choiceField =
new ObjectChoiceField("", choices, HighlightStyle.ILLUMINATE,
Field.FIELD_HCENTER);
_choiceField.setChangeListener(this);
add(_choiceField);
add(new SeparatorField());
// Initialize a check box for toggling the center lens
_centerLensCheckBox =
new CheckboxField("Enable center lens", false,
Field.FIELD_HCENTER);
_centerLensCheckBox.setChangeListener(this);
add(_centerLensCheckBox);
// Initialize a check box for overlapping images
_overlapCheckBox =
new CheckboxField("Overlap images", false, Field.FIELD_HCENTER);
_overlapCheckBox.setChangeListener(this);
add(_overlapCheckBox);
}
/**
* @see MainScreen#onSavePrompt()
*/
protected boolean onSavePrompt() {
// Suppress the save dialog
return true;
}
/**
* @see Screen#navigationClick(int, int)
*/
protected boolean navigationClick(final int status, final int time) {
if (_pictureScrollField.isFocus()) {
if (Touchscreen.isSupported()) {
UiApplication.getUiApplication().pushScreen(
new PinchScreen(_bitmaps[_pictureScrollField
.getCurrentImageIndex()]));
} else {
Dialog.inform("You selected item "
+ _pictureScrollField.getCurrentImageIndex());
}
return true;
}
return super.navigationClick(status, time);
}
/**
* @see Screen#touchEvent(TouchEvent)
*/
protected boolean touchEvent(final TouchEvent message) {
if (message.getEvent() == TouchEvent.CLICK) {
if (_pictureScrollField.isFocus()) {
if (Touchscreen.isSupported()) {
UiApplication.getUiApplication().pushScreen(
new PinchScreen(_bitmaps[_pictureScrollField
.getCurrentImageIndex()]));
} else {
Dialog.inform("You selected item "
+ _pictureScrollField.getCurrentImageIndex());
}
return true;
}
}
return super.touchEvent(message);
}
/**
* @see FieldChangeListener#fieldChanged(Field, int)
*/
public void fieldChanged(final Field field, final int context) {
if (field == _choiceField) {
// Set the highlight style
final int index = _choiceField.getSelectedIndex();
switch (index) {
case HighlightStyle.NO_HIGHLIGHT:
_pictureScrollField
.setHighlightStyle(HighlightStyle.NO_HIGHLIGHT);
break;
case HighlightStyle.ILLUMINATE:
_pictureScrollField
.setHighlightStyle(HighlightStyle.ILLUMINATE);
break;
case HighlightStyle.ILLUMINATE_WITH_ROUND_BORDER:
_pictureScrollField
.setHighlightStyle(HighlightStyle.ILLUMINATE_WITH_ROUND_BORDER);
break;
case HighlightStyle.ILLUMINATE_WITH_SQUARE_BORDER:
_pictureScrollField
.setHighlightStyle(HighlightStyle.ILLUMINATE_WITH_SQUARE_BORDER);
break;
case HighlightStyle.SQUARE_BORDER:
_pictureScrollField
.setHighlightStyle(HighlightStyle.SQUARE_BORDER);
break;
case HighlightStyle.MAGNIFY_LENS:
_pictureScrollField
.setHighlightStyle(HighlightStyle.MAGNIFY_LENS);
break;
case HighlightStyle.SHRINK_LENS:
_pictureScrollField
.setHighlightStyle(HighlightStyle.SHRINK_LENS);
break;
case HighlightStyle.ILLUMINATE_WITH_MAGNIFY_LENS:
_pictureScrollField
.setHighlightStyle(HighlightStyle.ILLUMINATE_WITH_MAGNIFY_LENS);
break;
case HighlightStyle.ILLUMINATE_WITH_SHRINK_LENS:
_pictureScrollField
.setHighlightStyle(HighlightStyle.ILLUMINATE_WITH_SHRINK_LENS);
break;
}
_pictureScrollField.setFocus();
} else if (field == _centerLensCheckBox) {
// Enable/disable the lens
_pictureScrollField.setCenteredLens(!_pictureScrollField
.hasCenteredLens());
} else if (field == _overlapCheckBox) {
// Toggle overlapping
if (_overlap) {
_pictureScrollField.setImageDistance(150);
_overlap = false;
} else {
_pictureScrollField.setImageDistance(100);
_overlap = true;
}
}
_pictureScrollField.setFocus();
}
}