fontchooser.java

用于移动设备上的java虚拟机源代码

/*
 * @(#)FontChooser.java	1.11 02/07/25 @(#)
 *
 * Copyright (c) 2000-2001 Sun Microsystems, Inc.  All rights reserved.
 * PROPRIETARY/CONFIDENTIAL
 * Use is subject to license terms.
 */

package example.chooser;

import javax.microedition.lcdui.*;

/**
 * A Font chooser.  This screen can be used to
 * choose fonts.  A form is used to select from
 * the various choices for size, style, and face.
 */
public class FontChooser extends Form implements ItemStateListener {
    int face;
    int style;
    int size;

    ChoiceGroup faceChoice;
    ChoiceGroup styleChoice;
    ChoiceGroup sizeChoice;

    /** 
     * Create a new font chooser form.
     * Create each of the form entries
     */
    public FontChooser() {
	super("Choose Attributes");
	faceChoice = new ChoiceGroup("Face", Choice.EXCLUSIVE);
	faceChoice.append("System", null);
	faceChoice.append("Monospace", null);
	faceChoice.append("Proportional", null);
	styleChoice = new ChoiceGroup("Style", Choice.MULTIPLE);
	styleChoice.append("Bold", null);
	styleChoice.append("Italic", null);
	styleChoice.append("Underlined", null);
	sizeChoice = new ChoiceGroup("Size", Choice.EXCLUSIVE);
	sizeChoice.append("Small", null);
	sizeChoice.append("Medium", null);
	sizeChoice.append("Large", null);

	append("Face");
	append(faceChoice);
	append("Style");
	append(styleChoice);
	append("Size");
	append(sizeChoice);
	
	setItemStateListener(this);
    }

    /**
     * Set the Style of font to display.
     * @param style the style to select
     * @see Font#getStyle
     */
    public void setStyle(int style) {
	this.style = style;
    }

    /**
     * Get the style of font currently being displayed.
     * @return the current style being used for text
     * @see Font#getStyle
     */
    public int getStyle() {
	return style;
    }


    /**
     * Set the Face of font to display.
     * @param face the face to select
     * @see Font#getFace
     */
    public void setFace(int face) {
	this.face = face;
    }

    /**
     * Get the face of font currently being displayed.
     * @return the current face of the font
     * @see Font#getFace
     */
    public int getFace() {
	return face;
    }


    /**
     * Set the Size of font to display.
     * @param size of the font to set
     * @see Font#getSize
     */
    public void setSize(int size) {
	this.size = size;
    }

    /**
     * Get the size of font currently being displayed.
     * @return the current size of the font
     * @see Font#getSize
     */
    public int getSize() {
	return size;
    }

    /**
     * Reflect changes in the item states into the states.
     * @param item that to which some change occurred
     */
    public void itemStateChanged(Item item) {
	if (item == faceChoice) {
	    int f = faceChoice.getSelectedIndex();
	    switch (f) {
		case 0: face = Font.FACE_SYSTEM; break;
		case 1: face = Font.FACE_MONOSPACE; break;
		case 2: face = Font.FACE_PROPORTIONAL; break;
	    }
	} else if (item == styleChoice) {
	    style = 0;
	    if (styleChoice.isSelected(0))
		style += Font.STYLE_BOLD;
	    if (styleChoice.isSelected(1))
		style |= Font.STYLE_ITALIC;
	    if (styleChoice.isSelected(2))
		style |= Font.STYLE_UNDERLINED;
	} else if (item == sizeChoice) {
	    int s = sizeChoice.getSelectedIndex();
	    switch (s) {
		case 0: size = Font.SIZE_SMALL; break;
		case 1: size = Font.SIZE_MEDIUM; break;
		case 2: size = Font.SIZE_LARGE; break;
	    }
	}
    }


}