import javax.microedition.lcdui.Graphics; //导入方法依赖的package包/类
public void draw(Graphics g) {
g.setColor(255, 255, 255);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(200, 200, 200);
int baseLineY;
if (signal.baseLineY() >= 0) {
baseLineY = (int) ((signal.baseLineY() / (double) signal.maxAltitude()) * (getHeight() / 2));
} else {
baseLineY = (int) ((Math.abs(signal.baseLineY()) / signal.maxAltitude()) * (getHeight() / 2));
baseLineY = -baseLineY;
}
baseLineY = this.getHeight() / 2 - baseLineY;
g.drawLine(0, baseLineY, getWidth(), baseLineY);
for (int i = 0; i < signal.highPoints().length; i++) {
if (signal.highPoints()[i] > offset && signal.highPoints()[i] < offset + getWidth()) {
int highPointY;
if (signal.get(signal.highPoints()[i]) >= 0) {
highPointY = (int) ((signal.get(signal.highPoints()[i]) / (double) signal.maxAltitude()) * (getHeight() / 2));
} else {
highPointY = (int) ((Math.abs(signal.get(signal.highPoints()[i])) / signal.maxAltitude()) * (getHeight() / 2));
highPointY = -highPointY;
}
highPointY = this.getHeight() / 2 - highPointY;
g.setColor(0, 0, 255);
g.drawLine(signal.highPoints()[i] - offset, highPointY, signal.highPoints()[i] - offset, baseLineY);
System.out.println(">>>>> " + signal.highPoints()[i] + ", " + highPointY + ", " + baseLineY);
}
}
System.out.println("===============");
int pixelsPerStep = (int) ((1 / 40.0) / signal.timeBetweenValues());
int numberOfSteps = signal.size() / pixelsPerStep;
for (int i = 1; i <= numberOfSteps; i++) {
if (i * pixelsPerStep > offset && i * pixelsPerStep < offset + getWidth()) {
g.setColor(249, 230, 213);
g.drawLine(i * pixelsPerStep - offset, 0, i * pixelsPerStep - offset, getHeight());
}
}
for (int i = 1; i <= getHeight() / pixelsPerStep; i++) {
g.setColor(249, 230, 213);
g.drawLine(0, i * pixelsPerStep, getWidth(), i * pixelsPerStep);
}
g.setColor(0, 0, 0);
g.drawLine(0, getHeight() / 2, getWidth(), getHeight() / 2);
for (int i = 1; i <= numberOfSteps / 20; i++) {
if (i * 20 * pixelsPerStep > offset && i * 20 * pixelsPerStep < offset + getWidth()) {
g.setColor(0, 0, 0);
g.fillRect(i * 20 * pixelsPerStep - offset - 2, getHeight() / 2 - 4, 4, 8);
}
}
int lastX = -1;
int lastY = -1;
g.setColor(255, 0, 0);
for (int x = 0; x < getWidth(); x++) {
int newX = x + offset;
if (newX >= 0 && newX <= signal.size()) {
int y;
if (signal.get(newX) >= 0) {
y = (int) ((signal.get(newX) / (double) signal.maxAltitude()) * (getHeight() / 2));
} else {
y = (int) ((Math.abs(signal.get(newX)) / signal.maxAltitude()) * (getHeight() / 2));
y = -y;
}
y = this.getHeight() / 2 - y;
if (lastX < 0) {
g.fillRect(x, y, 2, 2);
} else {
g.drawLine(lastX, lastY, x, y);
}
lastX = x;
lastY = y;
}
}
}
