drawcanvas.java

几个不错的手机程序例子

/*
 * DrawCanvas.java
 *
 * Copyright 2001 SkyArts. All Rights Reserved.
 */
import javax.microedition.lcdui.*;

/**
 * 变换Font的种类来描绘的Canvas类
 *
 * @author  Hideki Yonekawa
 * @version 1.0
 */
class DrawCanvas extends Canvas {
	/** 进行描绘的方法 */
	protected void paint(Graphics g) {
		//将背景涂白
		g.setColor(0x00FFFFFF);
		g.fillRect(0, 0, getWidth(), getHeight());

		//将颜色指定为黑色
		g.setColor(0x00000000);

		int drawY = 0;
		Font font = Font.getDefaultFont();
		//以默认字体来描绘文字
		g.drawString("Default", 0, drawY, Graphics.TOP|Graphics.LEFT);

		//加上描绘Font高度的Y坐标
		drawY = drawY + font.getHeight();
		//取得Font，设定至Graphics
		font = Font.getFont(Font.FACE_PROPORTIONAL, Font.STYLE_PLAIN, Font.SIZE_MEDIUM);
		g.setFont(font);
		//以Proportional、Plain、Medium字体来描绘文字
		g.drawString("Prop Plain Midium", 0, drawY, Graphics.TOP|Graphics.LEFT);

		//加上描绘Font高度的Y坐标
		drawY = drawY + font.getHeight();
		//取得Font，设定至Graphics
		font = Font.getFont(Font.FACE_MONOSPACE, Font.STYLE_BOLD, Font.SIZE_LARGE);
		g.setFont(font);
		//以Monospace、Bold、Large字体来描绘文字
		g.drawString("Mono Bold Large", 0, drawY, Graphics.TOP|Graphics.LEFT);

		//加上描绘Font高度的Y坐标
		drawY = drawY + font.getHeight();
		//取得Font，设定至Graphics
		font = Font.getFont(Font.FACE_PROPORTIONAL,
							Font.STYLE_BOLD | Font.STYLE_ITALIC,
							Font.SIZE_MEDIUM);
		g.setFont(font);
		//以Proportional、Bold|Italic、Medium字体来描绘文字
		g.drawString("Prop Bold|Italic Midium", 0, drawY, Graphics.TOP|Graphics.LEFT);

		//加上描绘Font高度的Y坐标
		drawY = drawY + font.getHeight();
		//取得Font，设定至Graphics
		font = Font.getFont(Font.FACE_SYSTEM,
							Font.STYLE_BOLD | Font.STYLE_ITALIC | Font.STYLE_UNDERLINED,
							Font.SIZE_SMALL);
		g.setFont(font);
		//System、Bold|Italic|Underline、Small字体来描绘文字
		g.drawString("System Bold|Italic|Under Small", 0, drawY, Graphics.TOP|Graphics.LEFT);

		//加上描绘Font高度的Y坐标
		drawY = drawY + font.getHeight();
		//取得Font，设定至Graphics
		font = Font.getFont(Font.FACE_SYSTEM,
							Font.STYLE_PLAIN | Font.STYLE_UNDERLINED,
							Font.SIZE_MEDIUM);
		g.setFont(font);
		//以System、Plain|Underline、Medium字体来描绘文字
		g.drawString("System Plain|Under Midium", 0, drawY, Graphics.TOP|Graphics.LEFT);
	}
}