用Applet写的菜单程序 machine

用Applet写的菜单程序 machine(5) curMenuItem = curMenu = -1;
repaint();
return true;
}

public boolean mouseEnter(Event evt, int x, int y) {
return mouseMove(evt, x, y);
}

public boolean mouseDown(Event evt, int x, int y) {
try {
String u = null;

if (curMenuItem >= 0 && itemUrl[curMenu].length > 0) {
u = itemUrl[curMenu][curMenuItem];
} else if (curMenu >= 0) {
u = url[curMenu];
}
if (u != null) {
URL url = new URL (getDocumentBase(), u);

if (getParameter("target") != null) {
getAppletContext().showDocument(url, getParameter("target")
); } else {
getAppletContext().showDocument(url);
}
}
} catch (Exception e) {
e.printStackTrace();
}
return true;
}

public boolean mouseMove(Event evt, int x, int y) {
if (curMenu >= 0) {
int sm = inMenu(menuItemRect, x, y);

if (curMenuItem != sm) {
curMenuItem = sm;
repaint();
}
if (sm >= 0) {
return true;
}
curMenu = -1;
}

int m = inMenu(hitArea, x, y);
if (m != curMenu) {
curMenu = m;


// A new menu is now active so compute menuItemRect.
if (m >= 0) {
// Minimum width
int maxWidth = 50;
int maxHeight = 0;

menuItemRect = new Rectangle[item[curMenu].length];
for (int i=0; i String[] line = parse(item[curMenu][i], "^");

for (int j=0; j int w = fm.stringWidth(line[j]);
if (w > maxWidth) {
maxWidth = w;
}
}

menuItemRect[i] = new Rectangle();
menuItemRect[i].height =
parse(item[curMenu][i], "^").length * fm.getHeight()
+ 2 * marginV;
maxHeight += menuItemRect[i].height;
}

// Determine domain of submenus

// Add one extra pixel for the left edge.
maxWidth += 2 * marginH + 1;
if (down[m]) {
y = Math.max(0, Math.min(size().height-maxHeight-1,
dstPt[curMenu].y + srcRect[curMenu].height-1));