private void Delete_user_buttonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Delete_user_buttonActionPerformed
        // TODO add your handling code here:

        Hide_buttons();
        int dialogResult = JOptionPane.showConfirmDialog (null, "Nastaviti sa opcijom?","Upozorenje",JOptionPane.YES_NO_OPTION);
         if(dialogResult == JOptionPane.YES_OPTION){

        //obrisati korisnika{}
        // Usermanager.DeleteWhereID("idOfUser",id);
         }

    }//GEN-LAST:event_Delete_user_buttonActionPerformed

    private void Clear_negative_points_buttonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Clear_negative_points_buttonActionPerformed
        // TODO add your handling code here:
        int dialogResult = JOptionPane.showConfirmDialog (null, "Da li ste sigurni da Ĺľelite da anulirate bodove izabranom korisniku?","Upozorenje",JOptionPane.YES_NO_OPTION);
        if(dialogResult == JOptionPane.YES_OPTION){

                 // kod za anuliranje
        		 // Usermanager.resetNegativePoints(id) ; id ?

        }
    }//GEN-LAST:event_Clear_negative_points_buttonActionPerformed

    private void Show_name_of_userActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Show_name_of_userActionPerformed
        // TODO add your handling code here:

        /*treba samo u textfild da upise nadjeno ime za dati ID
        ako nije pronasao, onda ispisuje poruku na ekranu

        if ( UserManager.findUserWithID(User_id.getText()) {
        String x = UserManager.getUsersNameSurnameWithID(User_id.getText()) ;

    	User_name_surname.setText(x);
        User_name_surname.setVisible(true);
    }
    */
        JOptionPane.showMessageDialog(null, "Unešeni ID nije validan", "Upozorenje", JOptionPane.INFORMATION_MESSAGE);


    }//GEN-LAST:event_Show_name_of_userActionPerformed

    private void Show_list_of_borrowed_booksActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Show_list_of_borrowed_booksActionPerformed
        // TODO add your handling code here:
        //treba ispisati listu knjiga sa nazivom i autorom

    	/*if( UserManager.checkID(id)) {
    	BorrowManager bm = new BorrowManager() ;
    	ArrayList<Borrow> borrowList = bm.getBorrowedBooksWithUserID(id) ; // id ?
    	DefaultTableModel dm = (DefaultTableModel)Borrowed_books_table.getModel();

        Object[] data = new Object[2];
        for ( Borrow i : blist ) {
        data[0] = i.getCopy().getBook().getTitle() ;
        //data[1] = i.getCopy().getBook().getAuthors().getAllAuthorsNameAndLastname() ;
         dm.addRow(data) ; // ne radi ako JTable nije defaultno definisan

        }
        dm.fireTableDataChanged();}

    	*/
        JOptionPane.showMessageDialog(null, "Unešeni ID nije validan", "Upozorenje", JOptionPane.INFORMATION_MESSAGE);

    }//GEN-LAST:event_Show_list_of_borrowed_booksActionPerformed

    private void Return_book_buttonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Return_book_buttonActionPerformed
        // TODO add your handling code here:
         int dialogResult = JOptionPane.showConfirmDialog (null, "Nastaviti sa opcijom?","Upozorenje",JOptionPane.YES_NO_OPTION);
         if(dialogResult == JOptionPane.YES_OPTION){
            //kod za brisanje knjige iz posudjenih knjiga


        	   	   DefaultTableModel dm = (DefaultTableModel)Borrowed_books_table.getModel();
                   String x = (String)dm.getDataVector().elementAt(Borrowed_books_table.getSelectedRow());
              	   int r = Borrowed_books_table.getSelectedRow() ;
                   String bookName = (String)Borrowed_books_table.getValueAt(r,0) ;
        	   	   String[] authorNames = (String[])Borrowed_books_table.getValueAt(r,1) ;
        	//     BorrowedMan.makeBookAvailable(bookName,authorNames) ;
        }
    }//GEN-LAST:event_Return_book_buttonActionPerformed

    private void Show_reserved_books_buttonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Show_reserved_books_buttonActionPerformed
        // TODO add your handling code here:
        //ispisi listu rezervisanih knjiga

    	/* ReservedManager resMan = new ReservedManager() ;
    	   ArrayList<Reservation> resList = resMan.getAllReservedBooks() ;
    	  DefaultTableModel dm = (DefaultTableModel)Reserved_book_table1.getModel();

        Object[] data = new Object[2];
        for ( Reservation i : reslist ) {
        data[0] = i.getCopy().getBook().getTitle() ;
        //data[1] = i.getCopy().getBook().getAuthors().getAllAuthorsNameAndLastname() ;
         dm.addRow(data) ; // ne radi ako JTable nije defaultno definisan

        }
        dm.fireTableDataChanged();}

    	 */

    }//GEN-LAST:event_Show_reserved_books_buttonActionPerformed

    private void Choosing_search_type_ComboBox1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Choosing_search_type_ComboBox1ActionPerformed
        // TODO add your handling code here:
    	   int choice = Choosing_search_type_ComboBox1.getSelectedIndex() ;


    }//GEN-LAST:event_Choosing_search_type_ComboBox1ActionPerformed


    private void Borrow_book_buttonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Borrow_book_buttonActionPerformed
        // TODO add your handling code here:
        /*treba na osnovu
        User_id.getText();
        i onoga sto je oznaceno u Reserved_books_table
        ili u Available_books_table da posudi knjigu
        */
    }//GEN-LAST:event_Borrow_book_buttonActionPerformed


    private void Show_users_with_penaltyActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Show_users_with_penaltyActionPerformed
        // TODO add your handling code here:
        //Ispisi listu korisnika sa negativnim bodovima
    	ArrayList<Users> userList = Usermanager.getUsersWithPenalty() ;
    	DefaultTableModel dm = (DefaultTableModel)Table_of_users.getModel();

    	Object[] data = new Object[4];
    	for ( Users i : userList ) {

            data[0] = i.getNameOfUser() ;
            data[1] = i.getLastnameOfUser();
            data[2] = i.getNegativePoints() ;
            data[3] = i.getIdOfUser() ;
    	dm.addRow(data) ; // ne radi ako JTable nije defaultno definisan

    	}
    	dm.fireTableDataChanged();


    }//GEN-LAST:event_Show_users_with_penaltyActionPerformed

    UsersManager Usermanager = new UsersManager() ;
    private void Show_all_users_button1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_Show_all_users_button1ActionPerformed
        // TODO add your handling code here:
    	ArrayList<Users> userList = Usermanager.getAllUsers() ;
    	DefaultTableModel dm = (DefaultTableModel)Table_of_users.getModel();

    	Object[] data = new Object[4];
    	for ( Users i : userList ) {

            data[0] = i.getNameOfUser() ;
            data[1] = i.getLastnameOfUser();
            data[2] = i.getNegativePoints() ;
            data[3] = i.getIdOfUser() ;
    	dm.addRow(data) ; // ne radi ako JTable nije defaultno definisan

    	}
    	dm.fireTableDataChanged();

        //listu svih korisnika (ime, prezime, ID,negativni bodovi
    //GEN-LAST:event_Show_all_users_button1ActionPerformed
    }