Code
protected int getTargetTabIndex(Point glassPt) {
int count = getTabCount();
if (count == 0) {
return -1;
}
Point tabPt = SwingUtilities.convertPoint(glassPane, glassPt, this);
boolean isHorizontal = isTopBottomTabPlacement(getTabPlacement());
for (int i = 0; i < count; ++i) {
Rectangle r = getBoundsAt(i);
// First half.
if (isHorizontal) {
r.width = r.width / 2 + 1;
} else {
r.height = r.height / 2 + 1;
}
if (r.contains(tabPt)) {
return i;
}
// Second half.
if (isHorizontal) {
r.x += r.width;
} else {
r.y += r.height;
}
if (r.contains(tabPt)) {
return i + 1;
}
}
Rectangle r = getBoundsAt(getTabCount() - 1);
r.translate(r.width * d.x / 2, r.height * d.y / 2);
return r.contains(tabPt) ? getTabCount() : -1;
}
private void convertTab(int prev, int next) {
if (next < 0 || prev == next) {
return;
}
Component cmp = getComponentAt(prev);
Component tab = getTabComponentAt(prev);
String str = getTitleAt(prev);
Icon icon = getIconAt(prev);
String tip = getToolTipTextAt(prev);
boolean flg = isEnabledAt(prev);
int tgtindex = prev > next ? next : next - 1;
remove(prev);
insertTab(str, icon, cmp, tip, tgtindex);
setEnabledAt(tgtindex, flg);
// When you drag'n'drop a disabled tab, it finishes enabled and selected.
// pointed out by dlorde
if (flg) {
setSelectedIndex(tgtindex);
}
// I have a component in all tabs (jlabel with an X to close the tab)
// and when i move a tab the component disappear.
// pointed out by Daniel Dario Morales Salas
setTabComponentAt(tgtindex, tab);
}
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