How to use a selection setback in custom renderer?

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How to use a selection setback in custom renderer?

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#1 by (3 votes)

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I'm trying to use a cell render, so when I display monetary data, it does formatting. However, when I apply rendering to a particular column, the focus in that column does not have the background of the rest of the row.

To solve this, I thought of doing the same thing I did in my AbstractTable, creating a method that would change the color of the selected line, so it ends up getting all over the line. However, being Default, I could not do the same thing. So if anyone knows a way to apply render that does not bug or know how to set the color.

To illustrate the problem:

In my abstract, I do this:

private JTable tabela = new JTable(jtmCompra) 
{
    @Override
    public Component prepareRenderer(TableCellRenderer renderer, int linha, int coluna) 
    {
        Component componente = super.prepareRenderer(renderer, linha,                  coluna);  

        if (isRowSelected(linha))//Focu na linha.
            {         

                componente.setBackground(new Color(147, 200, 255, 255)); 

            }       
     }      
}

Dai how "paint line" is right.

Simpleexample:

SystemScreen:

packagetelas;importjava.awt.event.ActionEvent;importjava.awt.event.ActionListener;importjavax.swing.JDesktopPane;importjavax.swing.JFrame;importjavax.swing.JMenu;importjavax.swing.JMenuBar;importjavax.swing.JMenuItem;publicclassTelaSistemaextendsJFrameimplementsActionListener{publicstaticJDesktopPanejdp=newJDesktopPane();publicJMenuBarjmb=newJMenuBar();publicJMenujmCadastros=newJMenu("Cadastros"); 
    public JMenuItem jmiE = new JMenuItem("Uma tela qualquer");

    public TelaSistema() 
    {     
        setExtendedState(MAXIMIZED_BOTH);
        setTitle("Sistema");
        getContentPane().add(jdp);
        setJMenuBar(jmb);
        jmb.add(jmCadastros);       
        adicionaJMenuItem(jmCadastros, jmiE);        
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setVisible(true);
    }

    private void adicionaJMenuItem(JMenu menu, JMenuItem item) 
    {    
        menu.add(item);
        item.addActionListener(this);
    }

    @Override
    public void actionPerformed(ActionEvent ae) 
    {
        if (ae.getSource() == jmiE)
        {
            TelaCadastroA a = new TelaCadastroA();
            jdp.add(a);
        }
    }

    public static void main(String args[]) 
    {
       TelaSistema telaSistema = new TelaSistema();
    }  
}

Screen: Registration

package telas;

import java.awt.Component;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.DecimalFormat;
import javax.swing.JButton;
import javax.swing.JInternalFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.table.DefaultTableCellRenderer;

public class TelaCadastroA extends JInternalFrame implements ActionListener
{
      public JButton jbConsultar = new JButton("Consultar");
      public JPanel jpBotoes = new JPanel();

    public TelaCadastroA() 
    {
        super("");    
        adicionaBotao(jbConsultar);
        setSize(500, 500);  
        getContentPane().add("South", jpBotoes);
        jpBotoes.setLayout(new GridLayout(1, 1));
        Dimension tamanhoTela = Toolkit.getDefaultToolkit().getScreenSize();
        setLocation((tamanhoTela.width - getWidth()) / 2, ((tamanhoTela.height - getHeight())) / 2);
        setVisible(true);
    }

    private void adicionaBotao(JButton botao) {
        jpBotoes.add(botao);
        botao.addActionListener(this);
    }

      @Override
    public void actionPerformed(ActionEvent ae)
    {
        if (ae.getSource() == jbConsultar) 
        {
            consultar();
        }
    }

    public void consultar() 
    {       
        TelaConsultar.getTela("Consulta",  new String[]
        {
            "Código", "A", "B", "C"
        }, new DefaultTableCellRenderer[] {null, null,  new CellRenderMonetario(), null}, this);
    } 

    class CellRenderMonetario extends DefaultTableCellRenderer 
    {
        private DecimalFormat df = new DecimalFormat(",##0.00");

        @Override
        public Component getTableCellRendererComponent(JTable tabela, Object valor, boolean isSelected, boolean temFocu, int linha, int coluna)
        {
            if (valor == null)
            {
                valor = 0;
            }

            if (valor instanceof String)
            {
                setText(df.format(Double.parseDouble((String) valor)) + " ");
            } 

            else 
            {
                setText(df.format(valor) + " ");
            }
            setHorizontalAlignment(SwingConstants.RIGHT);
            return this;
        }
    }
}

Coonsulta Screen:

package telas;

import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JInternalFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.event.InternalFrameEvent;
import javax.swing.event.InternalFrameListener;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumnModel;

public class TelaConsultar extends JInternalFrame implements InternalFrameListener, MouseListener {

    private static TelaConsultar telaConsultar = null;
    private String sql;
    private String[] titulos;
    private TelaCadastroA tela;
    private JTable tabela;
    private JScrollPane jsp;
    private DefaultTableModel dtm = new DefaultTableModel();
    private String proc;

    public TelaConsultar(String tituloJanela, String[] titulos, DefaultTableCellRenderer[] renderizadores, TelaCadastroA tela) 
    {
        super(tituloJanela, true, true, false, false);
        this.sql = sql;
        this.titulos = titulos;
        this.tela = tela;
        tabela = new JTable() 
        {
            @Override
            public boolean isCellEditable(int linha, int coluna)
            {
                return false;//Esta tabela não pode ser editada pois é uma consulta         
            }
        };
        tabela.setModel(dtm); //Define o modelo da tabela
        tabela.getTableHeader().setReorderingAllowed(false);
        for (int i = 0; i < titulos.length; i++) 
        {
            dtm.addColumn(titulos[i]);
        }
        jsp = new JScrollPane(tabela);
        getContentPane().add(jsp);
        preencher();
        //pack();
        setSize(650, 400);
        setMinimumSize(new Dimension(getWidth(), getHeight()));
        centralizaTelaConsulta();
        setVisible(true);
        tabela.addMouseListener(this);
        addInternalFrameListener(this);

        TableColumnModel tableModel = tabela.getColumnModel();
        for (int i = 0; i < titulos.length; i++)
        {
            tableModel.getColumn(i).setMinWidth(70);                    
        }

        for (int i = 0; i < tableModel.getColumnCount(); i++) 
        {
            if (renderizadores[i] != null) 
            {
                tableModel.getColumn(i).setCellRenderer(renderizadores[i]);
                /* if (isRowSelected(i))//Focu na linha.
                {

                }*/
            }

        }
    }

    public static void getTela(String tituloJanela, String[] titulos, DefaultTableCellRenderer[] renderizadores, TelaCadastroA tela) 
    {
        if (telaConsultar == null) 
        {
            telaConsultar = new TelaConsultar(tituloJanela, titulos, renderizadores, tela);
            TelaSistema.jdp.add(telaConsultar);
        }
        TelaSistema.jdp.setSelectedFrame(telaConsultar);
        TelaSistema.jdp.moveToFront(telaConsultar);
    }

    private void preencher() 
    {
        for (int i = 0; i < 10; i++) 
        {
            dtm.addRow(new Object[]{"" + i, "Brasil - " + i});
        }

    }

    public void centralizaTelaConsulta() 
    {
        Dimension tamanhoTela = Toolkit.getDefaultToolkit().getScreenSize();
        setLocation((tamanhoTela.width - getWidth()) / 2, ((tamanhoTela.height - getHeight())) / 2);
    }

    @Override
    public void mousePressed(MouseEvent e) {
    }

    @Override
    public void mouseReleased(MouseEvent e) {
    }

    @Override
    public void mouseEntered(MouseEvent e) {
    }

    @Override
    public void mouseExited(MouseEvent e) {
    }

    @Override
    public void internalFrameOpened(InternalFrameEvent e) {
    }

    @Override
    public void internalFrameClosing(InternalFrameEvent e) {
    }

    @Override
    public void internalFrameClosed(InternalFrameEvent e) {
        TelaSistema.jdp.remove(telaConsultar);
        telaConsultar = null;
    }

    @Override
    public void internalFrameIconified(InternalFrameEvent e) {
    }

    @Override
    public void internalFrameDeiconified(InternalFrameEvent e) {
    }

    @Override
    public void internalFrameActivated(InternalFrameEvent e) {

    }

    @Override
    public void internalFrameDeactivated(InternalFrameEvent e) {
    }

    @Override
    public void mouseClicked(MouseEvent me) {

    }
}

java swing jtable

asked by anonymous 05.11.2016 / 15:36

1 answer

Error in doing search by name Access ASP.NET C # Can I create a 2-position string Array Property in C #?

score 3 · Accepted Answer

As you are modifying the way this column renders, the default table settings are not applied, so the getTableCellRendererComponent has a isSelected , so that you can define it yourself. In the case of your code, the solution I found was to check if the field was selected, and copy the default selection settings from the table:

class CellRenderMonetario extends DefaultTableCellRenderer {

    private DecimalFormat df = new DecimalFormat(",##0.00");

    @Override
    public Component getTableCellRendererComponent(JTable tabela, Object valor, boolean isSelected, boolean temFocu, int linha, int coluna) {
        if (valor == null) {
            valor = 0;
        }
        if (isSelected) {
            setBackground(tabela.getSelectionBackground());
            setForeground(tabela.getSelectionForeground());
        } else {
            setBackground(tabela.getBackground());
            setForeground(tabela.getForeground());
        }

        if (valor instanceof String) {
            setText(df.format(Double.parseDouble((String) valor)) + " ");
        } else {
            setText(df.format(valor) + " ");
        }
        setHorizontalAlignment(SwingConstants.RIGHT);

        return this;
    }
}

With this, the field will follow the same selection color pattern as the rest of the table.

There are several things that could be improved on this code, especially the question of organization and responsibilities of classes and methods, but that would escape the scope of the question.