104             popupSize.width = Math.max(prefSize.width, popupSize.width);
 105         }
 106 
 107         popupSize.width += 10;
 108 
 109         return popupSize;
 110     }
 111 
 112     protected boolean shouldScroll() {
 113         return comboBox.getItemCount() > comboBox.getMaximumRowCount();
 114     }
 115 
 116     protected boolean isPopdown() {
 117         return shouldScroll() || AquaComboBoxUI.isPopdown(comboBox);
 118     }
 119 
 120     @Override
 121     public void show() {
 122         final int startItemCount = comboBox.getItemCount();
 123 




 124         final Rectangle popupBounds = adjustPopupAndGetBounds();
 125         if (popupBounds == null) return; // null means don't show
 126 
 127         comboBox.firePopupMenuWillBecomeVisible();
 128         show(comboBox, popupBounds.x, popupBounds.y);
 129 
 130         // hack for <rdar://problem/4905531> JComboBox does not fire popupWillBecomeVisible if item count is 0
 131         final int afterShowItemCount = comboBox.getItemCount();
 132         if (afterShowItemCount == 0) {
 133             hide();
 134             return;
 135         }
 136 
 137         if (startItemCount != afterShowItemCount) {
 138             final Rectangle newBounds = adjustPopupAndGetBounds();
 139             list.setSize(newBounds.width, newBounds.height);
 140             pack();
 141 
 142             final Point newLoc = comboBox.getLocationOnScreen();
 143             setLocation(newLoc.x + newBounds.x, newLoc.y + newBounds.y);

 104             popupSize.width = Math.max(prefSize.width, popupSize.width);
 105         }
 106 
 107         popupSize.width += 10;
 108 
 109         return popupSize;
 110     }
 111 
 112     protected boolean shouldScroll() {
 113         return comboBox.getItemCount() > comboBox.getMaximumRowCount();
 114     }
 115 
 116     protected boolean isPopdown() {
 117         return shouldScroll() || AquaComboBoxUI.isPopdown(comboBox);
 118     }
 119 
 120     @Override
 121     public void show() {
 122         final int startItemCount = comboBox.getItemCount();
 123 
 124         if (startItemCount == 0) {
 125             return;
 126         }
 127 
 128         final Rectangle popupBounds = adjustPopupAndGetBounds();
 129         if (popupBounds == null) return; // null means don't show
 130 
 131         comboBox.firePopupMenuWillBecomeVisible();
 132         show(comboBox, popupBounds.x, popupBounds.y);
 133 
 134         // hack for <rdar://problem/4905531> JComboBox does not fire popupWillBecomeVisible if item count is 0
 135         final int afterShowItemCount = comboBox.getItemCount();
 136         if (afterShowItemCount == 0) {
 137             hide();
 138             return;
 139         }
 140 
 141         if (startItemCount != afterShowItemCount) {
 142             final Rectangle newBounds = adjustPopupAndGetBounds();
 143             list.setSize(newBounds.width, newBounds.height);
 144             pack();
 145 
 146             final Point newLoc = comboBox.getLocationOnScreen();
 147             setLocation(newLoc.x + newBounds.x, newLoc.y + newBounds.y);