Java-yan.rar_applet

package myClass; import java.awt.*; public class myGraphics { double PI; public void drawLine(Graphics g, int x0, int y0, int x, int y, String str, Color color, Font font) { Color oldcolor = g.getColor(); Font oldfont = g.getFont(); g.drawLine(x0, y0, x, y); g.setColor(color); g.setFont(font); if(x > x0) g.drawString(str, (x0 + x + 20) / 2, (y0 + y) / 2); else g.drawString(str, ((x0 + x) - 20) / 2, (y0 + y) / 2); g.setColor(oldcolor); g.setFont(oldfont); } public void drawAngleline(Graphics g, int x0, int y0, int len, double angle) { int x = x0 + (int)((double)len * Math.cos(angle)); int y = y0 + (int)((double)len * Math.sin(angle)); g.drawLine(x0, y0, x, y); } public void drawArrow(Graphics g, int x0, int y0, int x, int y) { Font font1 = new Font("Dialog", 1, 15); drawArrow(g, x0, y0, x, y, " ", Color.black, font1); } public void drawArrow(Graphics g, int x0, int y0, int x, int y, String str, Color color, Font font) { int s = 8; double a = PI / 12D; Color oldcolor = g.getColor(); Font oldfont = g.getFont(); double angle = angleOfline(x0, y0, x, y); g.drawLine(x0, y0, x, y); if(angle <= PI / 2D) { drawAngleline(g, x, y, s, (PI / 2D + angle) - a); drawAngleline(g, x, y, s, PI / 2D + angle + a); } else { drawAngleline(g, x, y, s, angle - PI / 2D - a); drawAngleline(g, x, y, s, (angle - PI / 2D) + a); } g.setColor(color); g.setFont(font); if(x > x0) g.drawString(str, (x0 + x + 20) / 2, (y0 + y) / 2); else g.drawString(str, ((x0 + x) - 20) / 2, (y0 + y) / 2); g.setColor(oldcolor); g.setFont(oldfont); } public void drawArrow(Graphics g, int x0, int y0, int len, double angle) { Font font1 = new Font("Dialog", 1, 15); drawArrow(g, x0, y0, len, angle, " ", Color.black, font1); } public void drawArrow(Graphics g, int x0, int y0, int len, double angle, String str, Color color, Font font) { int s = 8; double a = PI / 12D; Color oldcolor = g.getColor(); Font oldfont = g.getFont(); drawAngleline(g, x0, y0, len, angle); int x = x0 + (int)((double)len * Math.cos(angle)); int y = y0 + (int)((double)len * Math.sin(angle)); if(angle <= PI / 2D) { drawAngleline(g, x, y, s, (PI / 2D + angle) - a); drawAngleline(g, x, y, s, PI / 2D + angle + a); g.setColor(color); g.setFont(font); g.drawString(str, x, y + 15); } else { drawAngleline(g, x, y, s, angle - PI / 2D - a); drawAngleline(g, x, y, s, (angle - PI / 2D) + a); g.setColor(color); g.setFont(font); g.drawString(str, x, y - 10); } g.setColor(oldcolor); g.setFont(oldfont); } public void drawCircle(Graphics g, int x, int y, int r, int startAngle, int arcAngle) { g.drawArc(x - r, y - r, 2 * r, 2 * r, startAngle, arcAngle); } public void drawMarrow(Graphics g, int x0, int y0, int len, double angle, String str, Color color, Font font) { int s = 8; double a = PI / 12D; Color oldcolor = g.getColor(); Font oldfont = g.getFont(); drawAnglemline(g, x0, y0, len, angle); int x = x0 + (int)((double)len * Math.cos(angle)); int y = y0 + (int)((double)len * Math.sin(angle)); if(angle <= PI / 2D) { drawAngleline(g, x, y, s, (PI / 2D + angle) - a); drawAngleline(g, x, y, s, PI / 2D + angle + a); g.setColor(color); g.setFont(font); g.drawString(str, x, y + 15); } else { drawAngleline(g, x, y, s, angle - PI / 2D - a); drawAngleline(g, x, y, s, (angle - PI / 2D) + a); g.setColor(color); g.setFont(font); g.drawString(str, x, y - 10); } g.setColor(oldcolor); g.setFont(oldfont); } public void drawFillarrow(Graphics g, int x0, int y0, double angle) { int s = 10; int x[] = new int[3]; int y[] = new int[3]; double a = PI / 12D; Color oldcolor = g.getColor(); g.setColor(Color.red); x[0] = x0; y[0] = y0; if(angle <= PI / 2D) { x[1] = x[0] + (int)((double)s * Math.cos((PI / 2D + angle) - a)); y[1] = y[0] + (int)((double)s * Math.sin((PI / 2D + angle) - a)); x[2] = x[0] + (int)((double)s * Math.cos(PI / 2D + angle + a)); y[2] = y[0] + (int)((double)s * Math.sin(PI / 2D + angle + a)); } else { x[1] = x[0] + (int)((double)s * Math.cos(angle - PI / 2D - a)); y[1] = y[0] + (int)((double)s * Math.sin(angle - PI / 2D - a)); x[2] = x[0] + (int)((double)s * Math.cos((angle - PI / 2D) + a)); y[2] = y[0] + (int)((double)s * Math.sin((angle - PI / 2D) + a)); } g.fillPolygon(x, y, 3); g.setColor(oldcolor); } public void drawMline(Graphics g, int x0, int y0, int x, int y,double step) { double m1 = Math.sqrt((x - x0) * (x - x0) + (y - y0) * (y - y0)); int num = (int)(m1 / step); int x1 = x0; int y1 = y0; for(int i = 0; i < num; i++) { int x2 = x0 + (int)Math.round((double)(step * (i + 1) * (x - x0)) / m1); int y2 = y0 + (int)Math.round((double)(step * (i + 1) * (y - y0)) / m1); if(i % 2 == 0) g.drawLine(x1, y1, x2, y2); x1 = x2; y1 = y2; } } public void drawAnglemline(Graphics g, int x0, int y0, int len, double angle) { int x = x0 + (int)((double)len * Math.cos(angle)); int y = y0 + (int)((double)len * Math.sin(angle)); // drawMline(g, x0, y0, x, y); } public double angleOfline(int x0, int y0, int x, int y) { double s = Math.sqrt((x - x0) * (x - x0) + (y - y0) * (y - y0)); double angle = Math.acos((double)(x - x0) / s); if(y >= y0) return angle; else return PI - angle; } public double angleOfoval(int x, int y, int x0, int y0, int a, int b) { double s = Math.sqrt(Math.pow(b, 4D) * (double)(x - x0) * (double)(x - x0) + Math.pow(a, 4D) * (double)(y - y0) * (double)(y - y0)); double angle = Math.acos((double)(a * a * (y - y0)) / s); if(x >= x0) return PI - angle; else return angle; } public myGraphics() { PI = 6.2831852000000001D; } public void fillCircle(Graphics g, int x0, int y0, int r, Color color) { Color oldcolor = g.getColor(); g.setColor(color); g.fillArc(x0 - r, y0 - r, 2 * r, 2 * r, 0, 360); g.setColor(oldcolor); } public void fillCircle(Graphics g, int x0, int y0,int l, int r, Color color1,Color color2,double angle) { Color oldcolor = g.getColor(); int x1=x0-(int)(r+l*Math.cos(angle)); int y1=y0-(int)(r+l*Math.sin(angle)); g.setColor(color1); g.fillOval(x1,y1,2*r,2*r); g.setColor(oldcolor); } public void Bar(Graphics g,int x,int y,int w,int h,int type) { if (type==0) g.setColor(Color.white); if (type==1) g.setColor(Color.black); g.drawLine(x,y,x+w,y); g.drawLine(x,y,x,y+h); if (type==1) g.setColor(Color.white); if (type==0) g.setColor(Color.black); g.drawLine(x+w,y,x+w,y+h); g.draw