Handle event based on interaction with item?

I'm working on an auto-drop script just for personal use, and I'm trying to work out how I want to select which items in my inventory to drop.  Currently, my script listens for Ctrl-F, and selects the item that's selected in the inventory, if one is selected.  In my opinion, this feels clunky.
 
Is it possible to listen for an interaction between the player and an item, and to handle an event based on the interaction?  I'm thinking of being able to hold Ctrl and "examine" an item in the inventory to select it, rather than toggling a state (selecting an item), pressing a hotkey, and then toggling again (deselecting the item).
 
I had the idea to keep track of each different item in the inventory (i.e. HashMap<String, ItemDefinition>), storing its "examine" text, and listening for a message similar to one that's stored, but as far as I can tell that would be massively inefficient and a pain to keep up with.
 
In other words, is there a method that would perform as if  onInteract(ItemInteractEvent e)?  TIA!

For reference, my handling code now (spoiler'd to prevent massive post)

@Override
public void onStart() {
    // add custom key listener
    this.getBot().getCanvas().addKeyListener(new com.github.chaoticweg.DropAll.KeyListener());
}

// ...

public void selectNewItem() {
    String newItem = this.getInventory().getSelectedItemName();
    if (newItem == null) newItem = "";

    selectedItem = newItem; // selectedItem declared above in class
    this.getInventory().deselectItem();
}

private boolean armed = false;
private DropAll script;

public KeyListener(DropAll script) {
    this.script = script;
}

@Override
public void keyTyped(KeyEvent e) {
    // do nothing
}

@Override
public void keyPressed(KeyEvent e) {
    if (e.getKeyCode() == KeyEvent.VK_CONTROL)
        armed = true;
    if (e.getKeyCode() == KeyEvent.VK_F)
        script.selectNewItem();
}

@Override
public void keyReleased(KeyEvent e) {
    if (e.getKeyCode() == KeyEvent.VK_CONTROL)
        armed = false;
}