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moorhen.java
Archived examples from previous versions of courses example from a Well House Consultants training course
More on Archived examples from previous versions of courses [link]
Source code: moorhen.java Module: J610
--- ARCHIVED EXAMPLE (may not be current) ---
--- See notes at http://www.wellho.net/mouth/2654.html --- import java.applet.*; import java.awt.*; public class moorhen extends Applet { private int basex, basey; Graphics g; // A Graphics object for drawing /** Initialize the button and the Graphics object */ public void init() { g = this.getGraphics(); clear(); } /** Respond to mouse clicks */ public boolean mouseDown(Event e, int x, int y) { basex = x; basey = y; return true; } /** Respond to mouse drags */ public boolean mouseDrag(Event e, int x, int y) { shape(basex,basey,x,y); return true; } /** Respond to key presses */ public boolean keyDown(Event e, int key) { if ((e.id == Event.KEY_PRESS) && (key == 'c')) { clear(); return true; } else return false; } /** convenience method to erase the scribble */ public void clear() { g.setColor(Color.black); g.fillRect(0, 0, bounds().width, bounds().height); } void shape(int x1, int y1, int x2, int y2) { clear(); // g.setColor(Color.yellow); // g.drawLine(basex, basey, x, y); int xpol[] = new int [4]; int ypol[] = new int [4]; int xlow = x1; int xhigh = x2; if (xlow > xhigh) { xlow = x2; xhigh = x1; } int ylow = y1; int yhigh = y2; if (ylow > yhigh) { ylow = y2; yhigh = y1; } g.setColor(Color.yellow); g.fillRect(xlow,ylow,xhigh-xlow,yhigh-ylow); g.setColor(Color.black); g.drawRect(xlow,ylow,xhigh-xlow,yhigh-ylow); xpol[0] = 0; ypol[0] = 0; xpol[1] = bounds().width; ypol[1] = 0; xpol[2] = xhigh; ypol[2] = ylow; xpol[3] = xlow; ypol[3] = ylow; g.setColor(Color.green); g.fillPolygon(xpol,ypol,4); g.setColor(Color.black); g.drawPolygon(xpol,ypol,4); xpol[0] = bounds().width; ypol[0] = bounds().height; xpol[3] = xhigh; ypol[3] = yhigh; g.setColor(Color.pink); g.fillPolygon(xpol,ypol,4); g.setColor(Color.black); g.drawPolygon(xpol,ypol,4); xpol[1] = 0; ypol[1] = bounds().height; xpol[2] = xlow; ypol[2] = yhigh; g.setColor(Color.orange); g.fillPolygon(xpol,ypol,4); g.setColor(Color.black); g.drawPolygon(xpol,ypol,4); xpol[0] = 0; ypol[0] = 0; xpol[3] = xlow; ypol[3] = ylow; g.setColor(Color.magenta); g.fillPolygon(xpol,ypol,4); g.setColor(Color.black); g.drawPolygon(xpol,ypol,4); } } Learn about this subject
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