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Line.java
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Line.java
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package com.bjut.model;
import com.baidu.frontia.demo.R;
import android.annotation.SuppressLint;
import android.graphics.Canvas;
import android.graphics.DashPathEffect;
import android.graphics.Paint;
import android.graphics.PathEffect;
public class Line extends Element {
public Line(int color, int land) {
super();
setColor(color);
setLand(land);
// changed = false;
}
@Override
protected Object clone() throws CloneNotSupportedException {
// TODO Auto-generated method stub
Line line = new Line(getColor(), getLand());
line.setPointStart((PointF) pointStart.clone());
line.setPointEnd((PointF) pointEnd.clone());
return line;
}
@SuppressLint("ResourceAsColor")
@Override
public void draw(Canvas canvas, Paint paint) {
// TODO Auto-generated method stub
paint.setColor(getColor());
paint.setStrokeWidth(getLand());
if (isDash()) {
paint.setStrokeWidth(7);
PathEffect effects = new DashPathEffect(new float[] { 1, 2, 4, 8 },
1);
paint.setPathEffect(effects);
paint.setColor(R.color.gray);
}
canvas.drawLine(pointStart.x, pointStart.y, pointEnd.x, pointEnd.y,
paint);
if (isDash()) {
paint.setPathEffect(null);
paint.setStrokeWidth(getLand());
paint.setColor(getColor());
}
}
@Override
void rotate(double angle) {
float centerX = (getPointStart().x + getPointEnd().x) / 2;
float centerY = (getPointStart().y + getPointEnd().y) / 2;
float p2x = 0f, p2y = 0f;
PointF p1 = null;
// for PointStart
p1 = getPointStart();
p2x = (float) (centerX + (p1.x - centerX) * Math.cos(angle) - (p1.y - centerY)
* Math.sin(angle));
p2y = (float) (centerY + (p1.y - centerY) * Math.cos(angle) + (p1.x - centerX)
* Math.sin(angle));
setPointStart(new PointF(p2x, p2y));
// for PointEnd
p1 = getPointEnd();
p2x = (float) (centerX + (p1.x - centerX) * Math.cos(angle) - (p1.y - centerY)
* Math.sin(angle));
p2y = (float) (centerY + (p1.y - centerY) * Math.cos(angle) + (p1.x - centerX)
* Math.sin(angle));
setPointEnd(new PointF(p2x, p2y));
return;
}
@Override
void zoom(double rate) {
float centerX = (getPointStart().x + getPointEnd().x) / 2;
float centerY = (getPointStart().y + getPointEnd().y) / 2;
float p2x = 0f, p2y = 0f;
PointF p1 = null;
// for PointStart
p1 = getPointStart();
p2x = (float) (centerX + (p1.x - centerX) * rate);
p2y = (float) (centerY + (p1.y - centerY) * rate);
setPointStart(new PointF(p2x, p2y));
// for PointEnd
p1 = getPointEnd();
p2x = (float) (centerX + (p1.x - centerX) * rate);
p2y = (float) (centerY + (p1.y - centerY) * rate);
setPointEnd(new PointF(p2x, p2y));
}
@Override
public void move(float lengthX, float lengthY) {
// TODO 自动生成的方法存根
// getPointStart().x = getPointStart().x+lengthX;
// getPointStart().y = getPointStart().y+lengthY;
this.pointStart.x = this.pointStart.x + lengthX;
this.pointStart.y = this.pointStart.y + lengthY;
this.pointEnd.x = this.pointEnd.x + lengthX;
this.pointEnd.y = this.pointEnd.y + lengthY;
}
public boolean isSelected(Point p) {
// TODO Auto-generated method stub
PointF pStart = new PointF(pointStart.x, pointStart.y);
PointF pEnd = new PointF(pointEnd.x, pointEnd.y);
float maxX, maxY, minX, minY;
if (pStart.x > pEnd.x) {
maxX = pStart.x;
minX = pEnd.x;
} else {
maxX = pEnd.x;
minX = pStart.x;
}
if (pStart.y > pEnd.y) {
maxY = pStart.y;
minY = pEnd.y;
} else {
maxY = pEnd.y;
minY = pStart.y;
}
if (!(p.x > minX - 10 && p.x < maxX + 10 && p.y > minY - 10 && p.y < maxY + 10)) {
return false;
} else {
double k = (double) (pEnd.y - pStart.y) / (pEnd.x - pStart.x);
double b1 = (double) (pStart.y - k * pStart.x);
double result = p.x * k + b1;
if (result - 25 <= p.y && p.y <= result + 25) {
return true;
} else {
return false;
}
}
}
// }
@Override
void unSelected() {
System.out.println("line unselected");
}
}