/**
* Copyright (c) 2013 Nokia Corporation. All rights reserved. Nokia and Nokia
* Connecting People are registered trademarks of Nokia Corporation. Oracle and
* Java are trademarks or registered trademarks of Oracle and/or its affiliates.
* Other product and company names mentioned herein may be trademarks or trade
* names of their respective owners. See LICENSE.TXT for license information.
*/
package com.nokia.example.musicexplorer.ui;
import javax.microedition.lcdui.CustomItem;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import org.tantalum.Task;
import org.tantalum.util.L;
import com.nokia.mid.ui.DirectGraphics;
import com.nokia.mid.ui.DirectUtils;
import com.nokia.example.musicexplorer.data.ApiCache;
import com.nokia.example.musicexplorer.data.model.AlbumModel;
import com.nokia.example.musicexplorer.data.model.ArtistModel;
import com.nokia.example.musicexplorer.data.model.GenericProductModel;
import com.nokia.example.musicexplorer.settings.Placeholders;
import com.nokia.example.musicexplorer.settings.ThumbnailSizes;
/**
* Displays ArtistModel info: thumbnail, artist name, genre, etc.
*/
public class ListItem extends CustomItem {
private static final int POINTER_JITTER = 10;
private static final String THUMBNAIL_SIZE = ThumbnailSizes.SIZE_50X50;
private static final int LIST_ITEM_SIDE = 50;
private static final int LIST_ITEM_WIDTH = 230;
private static final int LIST_ITEM_HEIGHT = LIST_ITEM_SIDE;
private static final int TEXT_OFFSET_X = LIST_ITEM_SIDE + 5;
private static final int TEXT_OFFSET_Y = 16;
private static final int TITLE_COLOR_HEX_RGB = 0x2AA7CC;
private static final int TEXT_COLOR_HEX_RGB = 0x4C4C4C;
private static final int HIGHLIGHT_COLOR_HEX_ARGB = 0x88FFFFFF;
public String thumbnailSize;
protected ViewManager viewManager;
private String text;
private int width;
private int height;
private Image thumbnail;
private int lastX;
private int lastY;
private boolean pointerActive;
private boolean pointerEnabled = true;
private GenericProductModel model;
private String albumOrTrackAmountText = "";
private Task getThumbnailTask;
/**
* Constructor.
* @param viewManager
* @param model
*/
public ListItem(ViewManager viewManager,
GenericProductModel model) {
this();
this.viewManager = viewManager;
this.model = model;
this.height = ListItem.LIST_ITEM_HEIGHT;
this.width = ListItem.LIST_ITEM_WIDTH;
}
/**
* Private default constructor.
*/
private ListItem() {
super(null);
}
public void sizeChanged(int w, int h) {
}
public void pointerPressed(int x, int y) {
if (pointerEnabled) {
this.lastX = x;
this.lastY = y;
this.pointerActive = true;
}
}
/**
* Detect if pointer gets dragged outside of the item's bounds.
*/
public void pointerDragged(int x, int y) {
if (pointerEnabled
&& !(Math.abs(x - lastX) < ListItem.POINTER_JITTER
&& Math.abs(y - lastY) < ListItem.POINTER_JITTER)) {
pointerActive = false;
}
}
/**
* If pointer is still inside bounds then select it.
*/
public void pointerReleased(int x, int y) {
if (pointerEnabled && pointerActive) {
pointerReleaseAction();
}
pointerActive = false;
repaint(); // Called to de-highlight
}
public String toString() {
return "ListItem: " + this.text;
}
protected int getMinContentHeight() {
return height;
}
protected int getMinContentWidth() {
return width;
}
protected int getPrefContentHeight(int arg0) {
return height;
}
protected int getPrefContentWidth(int arg0) {
return width;
}
/**
* @see javax.microedition.lcdui.CustomItem#paint(Graphics, int, int)
*/
public void paint(Graphics graphics, int width, int height) {
paint(graphics, 0, 0, width, height);
}
public void setThumbnail(Image thumbnail) {
this.thumbnail = thumbnail;
}
/**
* For convenience. Paints this item in the given position.
*
* @param graphics The Graphics instance.
* @param x The X coordinate of the item.
* @param y The Y coordinate of the item.
*/
public void paintXY(Graphics graphics, int x, int y) {
paint(graphics, x, y, width, height);
}
public void disablePointer() {
this.pointerEnabled = false;
}
public void setAlbumOrTrackAmountText(String text) {
this.albumOrTrackAmountText = text;
repaint();
}
/**
* For convenience.
*/
protected void paint(Graphics graphics, int x, int y, int width, int height) {
graphics.setColor(TEXT_COLOR_HEX_RGB);
// Paints the first two rows of text.
if (this.model instanceof ArtistModel) {
paintArtistDetails(graphics, x, y);
} else if (this.model instanceof AlbumModel) {
paintAlbumDetails(graphics, x, y);
}
// Paints the third row of text if it is set.
paintAlbumOrTrackAmountText(graphics, x, y);
if (thumbnail != null) {
graphics.drawImage(thumbnail, x, y, Graphics.TOP | Graphics.LEFT);
} else {
// Paint a placeholder image if thumbnail is not yet loaded
Placeholders.paint(graphics, model, x, y, Graphics.TOP | Graphics.LEFT);
// Begin loading thumbnail image
getThumbnail();
}
if(pointerActive) {
paintHighlight(graphics, x, y);
}
}
protected void paintHighlight(Graphics graphics, int x, int y) {
int originalColor = graphics.getColor(); // Save color
DirectGraphics directGraphics =
DirectUtils.getDirectGraphics(graphics);
directGraphics.setARGBColor(HIGHLIGHT_COLOR_HEX_ARGB);
graphics.fillRect(
x,
y,
ListItem.LIST_ITEM_SIDE,
ListItem.LIST_ITEM_SIDE);
graphics.setColor(originalColor); // Restore original color
}
/**
* Paints the third row of text if the text is set.
* @param graphics
* @param x
* @param y
*/
protected void paintAlbumOrTrackAmountText(
Graphics graphics, int x, int y) {
if (this.albumOrTrackAmountText.length() > 0) {
graphics.setFont(
Font.getFont(
Font.FACE_SYSTEM,
Font.STYLE_ITALIC,
Font.SIZE_SMALL));
graphics.drawString(
this.albumOrTrackAmountText,
x + ListItem.TEXT_OFFSET_X,
y + ListItem.TEXT_OFFSET_Y * 2,
Graphics.TOP | Graphics.LEFT);
}
}
protected void paintArtistDetails(Graphics graphics, int x, int y) {
// Paint artist's name.
graphics.setFont(
Font.getFont(
Font.FACE_SYSTEM,
Font.STYLE_BOLD,
Font.SIZE_SMALL));
graphics.setColor(TITLE_COLOR_HEX_RGB);
graphics.drawString(
this.model.name,
x + ListItem.TEXT_OFFSET_X,
y,
Graphics.TOP | Graphics.LEFT);
// Paint the genre(s).
graphics.setFont(
Font.getFont(
Font.FACE_SYSTEM,
Font.STYLE_PLAIN,
Font.SIZE_SMALL));
graphics.setColor(TEXT_COLOR_HEX_RGB);
graphics.drawString(
this.model.getGenres(),
x + ListItem.TEXT_OFFSET_X,
y + ListItem.TEXT_OFFSET_Y,
Graphics.TOP | Graphics.LEFT);
}
protected void paintAlbumDetails(Graphics graphics, int x, int y) {
// Paint album's name.
graphics.setFont(
Font.getFont(
Font.FACE_SYSTEM,
Font.STYLE_BOLD,
Font.SIZE_SMALL));
graphics.setColor(TITLE_COLOR_HEX_RGB);
graphics.drawString(
this.model.name,
x + ListItem.TEXT_OFFSET_X,
y,
Graphics.TOP | Graphics.LEFT);
// Paint performers.
graphics.setFont(
Font.getFont(
Font.FACE_SYSTEM,
Font.STYLE_PLAIN,
Font.SIZE_SMALL));
graphics.setColor(TEXT_COLOR_HEX_RGB);
graphics.drawString(
((AlbumModel) this.model).getPerformerNames(),
x + ListItem.TEXT_OFFSET_X,
y + ListItem.TEXT_OFFSET_Y,
Graphics.TOP | Graphics.LEFT);
}
/**
* Currently opens only an artist view.
*/
private void pointerReleaseAction() {
if (this.model instanceof ArtistModel) {
ArtistView artistView = new ArtistView(
viewManager,
(ArtistModel) this.model);
// Artist view is added to view manager by using addtoStack().
viewManager.addToStack(artistView);
}
else if (this.model instanceof AlbumModel) {
AlbumView albumView = new AlbumView(
viewManager,
(AlbumModel) this.model,
true);
viewManager.showView(albumView);
}
}
private void getThumbnail() {
// Checks if task is already triggered
if (this.thumbnail == null && this.getThumbnailTask == null) {
try {
this.getThumbnailTask = ApiCache.getImage(
this.model.getThumbnailUrl(ListItem.THUMBNAIL_SIZE),
new PlaceImageTask(this));
} catch (Exception e) {
L.e("No thumbnail available or not loaded yet for item",
this.toString(), e);
}
}
}
public class PlaceImageTask extends Task {
private ListItem item;
public PlaceImageTask(ListItem item) {
super(Task.NORMAL_PRIORITY);
this.item = item;
}
public Object exec(Object thumbnail) {
if (thumbnail instanceof Image) {
this.item.setThumbnail((Image) thumbnail);
this.item.repaint();
}
return thumbnail;
}
}
}