?? visrectangle.java
字號:
import java.awt.*;
public class visRectangle extends Drawing
{
public visRectangle(int xpt, int ypt)
{
x = xpt; y = ypt;
w = 40; h = 30;
saveAsRect();
}
//-------------------------------------------
public void draw(Graphics g)
{
g.drawRect(x, y, w, h);
if(filled)
{
g.setColor(fillColor);
g.fillRect(x,y,w,h);
}
if (selected)
{
g.setColor(Color.black);
g.fillRect(x+w/2, y-2, 4, 4);
g.fillRect(x-2, y+h/2, 4, 4);
g.fillRect(x+w/2, y+h-2, 4, 4);
g.fillRect(x+w-2, y+h/2, 4, 4);
}
}
}
//===============================================
class rectMemento extends Memento
{
visRectangle rect;
//saved fields- remember internal fields
//of the specified visual rectangle
int x, y, w, h;
public rectMemento(visRectangle r)
{
super(r);
rect = r;
x = rect.x; y = rect.y;
w = rect.w; h = rect.h;
}
//-------------------------------------------
public void restore()
{
//restore the internal state of
//the specified rectangle
rect.x = x; rect.y = y;
rect.h = h; rect.w = w;
}
}
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