/**
* Called to create a map the parent of each bookmark.
*
* @param parent top level bookmark.
* @param parentMap map to add children to.
* @param pagenoVector vector of page numbers.
* @param depth object indicating bookmark depth.
*/
protected void mapChildren(
final Bookmark parent,
final Hashtable parentMap,
final Vector pagenoVector,
final Number depth) {
getDepthMap().put(parent, depth);
final int pageno = parent.getPageno();
if (pageno >= 0) {
while (pageno >= pagenoVector.size()) {
pagenoVector.addElement(null);
}
pagenoVector.setElementAt(parent, pageno);
}
final Enumeration e = parent.elements();
if (e.hasMoreElements()) {
final Number childDepth = new Integer(depth.intValue() + 1);
do {
final Bookmark child = (Bookmark) e.nextElement();
parentMap.put(child, parent);
mapChildren(child, parentMap, pagenoVector, childDepth);
} while (e.hasMoreElements());
}
}
/**
* Called to recursively paint the check box for the specified item.
*
* @param item row number
* @param g graphics object to paint.
* @param bookmark to check selected value.
* @return the next row number to paint.
*/
public int paintCheckbox(final int item, final Graphics g, final Bookmark bookmark) {
int nextItem = item + 1;
if (bookmark != null) {
final Rectangle checkboxBounds =
getCheckboxBounds(item, bookmark, getDepthMap().get(bookmark));
final int yCheckboxMidPoint = checkboxBounds.y + (checkboxBounds.height / 2);
final int xCheckboxMidPoint = checkboxBounds.x + (checkboxBounds.width / 2);
final Enumeration e = bookmark.elements();
if (e.hasMoreElements()) {
// clear any lines crossing through the checkbox.
g.clearRect(
checkboxBounds.x, checkboxBounds.y, checkboxBounds.width, checkboxBounds.height);
// draw box around checkbox
g.drawRect(checkboxBounds.x, checkboxBounds.y, checkboxBounds.width, checkboxBounds.height);
// draw dash inside checkbox
g.drawLine(
checkboxBounds.x + 2,
yCheckboxMidPoint,
(checkboxBounds.x + checkboxBounds.width) - 2,
yCheckboxMidPoint);
boolean drawPlus = true;
do {
final Bookmark child = (Bookmark) e.nextElement();
final Bookmark next = getBookmark(nextItem);
if (child != next) {
break;
}
drawPlus = false;
nextItem = paintCheckbox(nextItem, g, child);
} while (e.hasMoreElements());
if (drawPlus) {
g.drawLine(
xCheckboxMidPoint,
checkboxBounds.y + 2,
xCheckboxMidPoint,
(checkboxBounds.y + checkboxBounds.height) - 2);
}
}
}
return nextItem;
}
/**
* Query the maximum image size allowed.
*
* @return the maximum image size allowed.
*/
public Dimension getMaximumSize() {
final Dimension retval = new Dimension();
final Hashtable depthMap = getDepthMap();
int item = 0;
synchronized (getActiveVector()) {
final Enumeration keys = getDepthMap().keys();
while (keys.hasMoreElements()) {
final Bookmark bookmark = (Bookmark) keys.nextElement();
final Rectangle bounds = getTextBounds(item++, bookmark, depthMap.get(bookmark));
final int width = bounds.x + bounds.width;
if (width > retval.width) {
retval.width = width;
}
retval.height = bounds.y + bounds.height;
}
}
retval.width += (2 * getFontMetrics(getFont()).getMaxAdvance());
retval.height += (2 * getFontHeight());
return retval;
}
/**
* Called to recursively paint text and lines for the specified item.
*
* @param item row number
* @param g graphics object to paint.
* @param bookmark to check selected value.
* @return the next row number to paint.
*/
public int paintItem(final int item, final Graphics g, final Bookmark bookmark) {
int nextItem = item + 1;
if (bookmark != null) {
final Rectangle textBounds = getTextBounds(item, bookmark, getDepthMap().get(bookmark));
final int yTextMidPoint = textBounds.y + (textBounds.height / 2);
final Enumeration e = bookmark.elements();
final String displayName = bookmark.getDisplayName();
if (displayName != null) {
g.drawString(displayName, textBounds.x, textBounds.y + textBounds.height);
}
if (e.hasMoreElements()) {
// draw line from checkbox to text
g.drawLine(textBounds.x - getFontWidth(), yTextMidPoint, textBounds.x - 2, yTextMidPoint);
final int xLineToChildren = textBounds.x - (getFontWidth() / 2);
int southLine = yTextMidPoint;
do {
final Bookmark child = (Bookmark) e.nextElement();
final Bookmark next = getBookmark(nextItem);
if (child != next) {
break;
}
southLine = (((2 * nextItem) + 1) * getFontHeight()) / 2;
g.drawLine(xLineToChildren, southLine, textBounds.x - 2, southLine);
nextItem = paintItem(nextItem, g, child);
} while (e.hasMoreElements());
if (southLine > yTextMidPoint) {
g.drawLine(xLineToChildren, yTextMidPoint, xLineToChildren, southLine);
}
} else if (displayName != null) {
g.drawLine(textBounds.x - getFontWidth(), yTextMidPoint, textBounds.x - 2, yTextMidPoint);
}
}
return nextItem;
}
/**
* Check bookmark at the specified row number.
*
* @param item row number.
* @param checked true if checked.
* @param activeVector vector of active bookmarks.
*/
protected void setCheckedItem(final int item, final boolean checked, final Vector activeVector) {
final Bookmark bookmark = getBookmark(item);
if (bookmark.size() > 0) {
final Enumeration e = bookmark.elements();
int i = item + 1;
if (e.hasMoreElements()) {
if (checked) {
do {
final Bookmark child = (Bookmark) e.nextElement();
final Bookmark next = getBookmark(i);
if (next == child) {
break;
}
activeVector.insertElementAt(child, i++);
} while (e.hasMoreElements());
} else {
do {
final Bookmark child = (Bookmark) e.nextElement();
final Bookmark next = getBookmark(i);
if (next != child) {
break;
}
setCheckedItem(i, false);
activeVector.removeElementAt(i);
} while (e.hasMoreElements());
}
}
repaint(20L);
}
}