より「エレガントな」ソリューションを探している場合に備えて、オンラインで便利なリソースを見つけました。参考のためにここに投稿していますが、HtmlComponent がその役割を果たします。
import com.sun.lwuit.Font;
/** A class supporting word wrap for MIDP. */
public class WordWrap {
Font font;
int width;
String txt;
int pos;
/**
* Initializes the WordWrap object with the given Font, the text string
* to be wrapped, and the target width.
*
* @param font: The Font to be used to calculate the character widths.
* @param txt: The text string to be wrapped.
* @param width: The line width.
*/
public WordWrap (Font font, String txt, int width) {
this.font = font;
this.txt = txt;
this.width = width;
}
/**
* returns the next line break position. If no text is left, -1 is returned.
*/
public int next () {
int i = pos;
int len = txt.length ();
if (pos >= len) return -1;
int start = pos;
while (true) {
while (i < len && txt.charAt (i) > ' ')
i++;
int w = font.stringWidth (txt.substring (start, i));
if (pos == start) {
if (w > width) {
while (font.stringWidth (txt.substring (start, --i)) > width)
{ }
pos = i;
break;
}
}
if (w <= width) pos = i;
if (w > width || i >= len || txt.charAt(i) == '\n') break;
i++;
}
return pos >= len ? pos : ++pos;
}
}
import com.sun.lwuit.Button;
import com.sun.lwuit.Component;
import com.sun.lwuit.Container;
import com.sun.lwuit.Display;
import com.sun.lwuit.Label;
import com.sun.lwuit.events.ActionListener;
import com.sun.lwuit.events.FocusListener;
import com.sun.lwuit.geom.Dimension;
import com.sun.lwuit.layouts.BoxLayout;
import com.sun.lwuit.plaf.Border;
import com.sun.lwuit.plaf.Style;
/**
*
* @author rubycube
*/
public class WrapList extends Container {
private Button hiddenButton;
private int id;
public WrapList(String text, int containerID) {
id = containerID;
this.setLayout(new BoxLayout(BoxLayout.Y_AXIS));
this.setFocusable(false);
final Style thisContainerStyle = this.getStyle();
Border thisContainerBorder = Border.createRoundBorder(20, 20, 0xcccccc);
thisContainerStyle.setBorder(thisContainerBorder);
hiddenButton = new Button(" ");
hiddenButton.setPreferredSize(new Dimension(1, 1));
Style style = hiddenButton.getStyle();
style.setBgTransparency(0, false);
style.setBorder(Border.createEmpty());
FocusListener hiddenButtonFL = new FocusListener() {
public void focusGained(Component cmp) {
WrapList parentContainer = ((WrapList) (cmp.getParent()));
Border parentContainerBorder = Border.createRoundBorder(20, 20, 0xff6600);
Style parentContainerStyle = parentContainer.getStyle();
parentContainerStyle.setBorder(parentContainerBorder);
parentContainerStyle.setBgColor(0xff9900);
parentContainerStyle.setBgTransparency(50);
parentContainer.repaint();
}
public void focusLost(Component cmp) {
WrapList parentContainer = ((WrapList) (cmp.getParent()));
Border parentContainerBorder = Border.createRoundBorder(20, 20, 0xcccccc);
Style parentContainerStyle = parentContainer.getStyle();
parentContainerStyle.setBorder(parentContainerBorder);
parentContainerStyle.setBgTransparency(0);
parentContainer.repaint();
}
};
hiddenButton.addFocusListener(hiddenButtonFL);
Label l = new Label(text);
l.setSelectedStyle(thisContainerStyle);
//l.setUnselectedStyle(thisContainerStyle);
WordWrap ww = new WordWrap(l.getStyle().getFont(), text, (Display.getInstance().getDisplayWidth() - 10));
int si = 0;
int ei = 0;
while (true) {
int np = ww.next();
if (np == -1) {
break;
} else {
si = ei;
ei = np;
}
String lineText = text.substring(si, ei);
Label line = new Label(lineText);
line.setEndsWith3Points(false);
this.addComponent(line);
}
this.addComponent(hiddenButton);
}
public void addActionListener(ActionListener actionlistener) {
hiddenButton.addActionListener(actionlistener);
}
/**
* @return the id
*/
public int getId() {
return id;
}
/**
* @param id the id to set
*/
public void setId(int id) {
this.id = id;
}
}