private void componentListKeyReleased(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_componentListKeyReleased
        if(evt.getKeyCode() == KeyEvent.VK_C && evt.isControlDown()){
            this.getDiagramPanel().copySelectedElements();
        }
        if(evt.getKeyCode() == KeyEvent.VK_V && evt.isControlDown()){
            this.getDiagramPanel().pasteSelectedElements(0, 0);
        }
        if(evt.getKeyCode() == KeyEvent.VK_DELETE){
            this.getDiagramPanel().deleteSelectedElements();
        }
    }