setOpaque () en java
¿Alguien puede explicar por qué Nimbius trata el setOpaque () de manera diferente a otros Java LaF? Está rompiendo mi código porque los componentes que normalmente son transparentes ya no lo son.
EDITAR: El problema parece solo tratar con JTextAreas (que es lo que necesito) o componentes similares.
EDITAR EDITAR: Esta es una pantalla de la aplicación real. Al aplicar la solución de trashgod, el fondo aún no se muestra.
EDITAR EDITAR EDITAR:
Intenté la sugerencia de trashgod para anular la pintura (). Trabajé con esto durante horas, y no pude hacerlo funcionar. Pude mostrar el fondo, pero el JinternalFrame no se pudo mover, cambiar de tamaño y seleccionar su texto. Llamar a super.paint (g) no pudo resolver la solución. ¿Hay alguna manera fácil de hacer esto que pueda estar perdiendo?
He tomado un nuevo enfoque para esto. Dentro del JInternalFrame hay un JLayeredPane.
Capa 0 - JLabel
Capa 1 - JTextArea
Cuando el JInternalFrame se mueve o cambia de tamaño:
Se hace invisibleToma una captura de pantalla de dónde estaba en el contenedor en el que está contenidoPinta el JLabel con la imagen que tomóSe hace visible de nuevo.Como no pude lograr que JInternalFrame fuera transparente en absoluto. Simulé su transparencia. El único problema es que hay muchos gastos generales asociados con esto. ¿Alguna idea?
package newpackage;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JLayeredPane;
import javax.swing.JPanel;
import javax.swing.UIManager;
/**
* Example of how to create a transparent internal frame.
* @author dvargo
*/
public class TransparentInternalFrame extends JInternalFrame {
JLayeredPane container;
/**
* Defualt constructor to set the frame up
* @param container The container for the frame
* @param opacity The opacity of the frame
*/
public TransparentInternalFrame(JLayeredPane container, int opacity) {
super("", true, true, true, true);
this.container = container;
initComponents();
setSize(200, 200);
putClientProperty("JInternalFrame.isPalette", Boolean.TRUE);
scrollPane.setBackground(new Color(0, 0, 0, opacity));
scrollPane.getViewport().setBackground(new Color(0, 0, 0, opacity));
textArea.setBackground(new Color(0, 0, 0, opacity));
setBG();
}
/**
* Builds the GUI
*/
private void initComponents() {
layeredPane = new javax.swing.JLayeredPane();
imageLabel = new javax.swing.JLabel();
scrollPane = new javax.swing.JScrollPane();
textArea = new javax.swing.JTextArea();
imageLabel.setBounds(0, 0, 360, 260);
layeredPane.add(imageLabel, javax.swing.JLayeredPane.DEFAULT_LAYER);
scrollPane.setBorder(null);
textArea.setColumns(20);
textArea.setRows(5);
textArea.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyPressed(java.awt.event.KeyEvent evt) {
textAreaKeyPressed(evt);
}
public void keyReleased(java.awt.event.KeyEvent evt) {
textAreaKeyReleased(evt);
}
public void keyTyped(java.awt.event.KeyEvent evt) {
textAreaKeyTyped(evt);
}
});
addComponentListener(new java.awt.event.ComponentAdapter() {
public void componentMoved(java.awt.event.ComponentEvent evt) {
frameMoved();
}
public void componentResized(java.awt.event.ComponentEvent evt) {
frameResized();
}
});
scrollPane.setViewportView(textArea);
scrollPane.setBounds(0, 0, 360, 260);
layeredPane.add(scrollPane, javax.swing.JLayeredPane.PALETTE_LAYER);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addComponent(layeredPane, javax.swing.GroupLayout.PREFERRED_SIZE, 362, javax.swing.GroupLayout.PREFERRED_SIZE));
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addComponent(layeredPane, javax.swing.GroupLayout.PREFERRED_SIZE, 261, javax.swing.GroupLayout.PREFERRED_SIZE));
}
/**
* The text will be blurred with out this
* @param evt
*/
private void textAreaKeyTyped(java.awt.event.KeyEvent evt) {
repaintAll();
}
/**
* The text will be blurred with out this
* @param evt
*/
private void textAreaKeyPressed(java.awt.event.KeyEvent evt) {
repaintAll();
}
/**
* The text will be blurred with out this
* @param evt
*/
private void textAreaKeyReleased(java.awt.event.KeyEvent evt) {
repaintAll();
}
/**
* Capture whats behind the frame and paint it to the image label
*/
private void setBG() {
setVisible(false);
Rectangle location = new Rectangle(this.getX() + container.getX(),
this.getY() + container.getY(),
(int) this.getSize().getWidth() + 8 + ((javax.swing.plaf.basic.BasicInternalFrameUI) getUI()).getNorthPane().getWidth(),
(int) this.getSize().getHeight() + ((javax.swing.plaf.basic.BasicInternalFrameUI) getUI()).getNorthPane().getHeight() + 4);
ImageIcon newIcon = new ImageIcon(createImage((JComponent) container, location));
setVisible(true);
imageLabel.setIcon(newIcon);
repaint();
}
/**
* Only need to update the image label if the frame is moved or resized
*/
private void frameResized() {
setBG();
textArea.repaint();
}
/**
* Only need to update the image label if the frame is moved or resized
*/
private void frameMoved() {
setBG();
for(Component x : container.getComponents())
{
//see if its a jinternalframe
if(x.getClass().getName().equals(this.getClass().getName()))
{
//cast it
TransparentInternalFrame temp = (TransparentInternalFrame)x;
//make sure its not the same one as this
if(x.getBounds().equals(this.getBounds()))
{
return;
}
//if they intersect
if(x.getBounds().intersects(this.getBounds()))
{
this.setVisible(false);
temp.setBG();
this.setVisible(true);
}
}
}
textArea.repaint();
}
private void repaintAll() {
textArea.repaint();
imageLabel.repaint();
layeredPane.repaint();
scrollPane.repaint();
scrollPane.getViewport().repaint();
textArea.repaint();
repaint();
}
/**
* Create a BufferedImage for Swing components.
* All or part of the component can be captured to an image.
*
* @param component Swing component to create image from
* @param region The region of the component to be captured to an image
* @return image the image for the given region
*/
public static BufferedImage createImage(JComponent component, Rectangle region) {
// Make sure the component has a size and has been layed out.
// (necessary check for components not added to a realized frame)
if (!component.isDisplayable()) {
Dimension d = component.getSize();
if (d.width == 0 || d.height == 0) {
d = component.getPreferredSize();
component.setSize(d);
}
layoutComponent(component);
}
BufferedImage image = new BufferedImage(region.width, region.height, BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = image.createGraphics();
// Paint a background for non-opaque components,
// otherwise the background will be black
if (!component.isOpaque()) {
g2d.setColor(component.getBackground());
g2d.fillRect(region.x, region.y, region.width, region.height);
}
g2d.translate(-region.x, -region.y);
component.paint(g2d);
g2d.dispose();
return image;
}
public static void layoutComponent(Component component) {
synchronized (component.getTreeLock()) {
component.doLayout();
if (component instanceof Container) {
for (Component child : ((Container) component).getComponents()) {
layoutComponent(child);
}
}
}
}
private javax.swing.JLabel imageLabel;
private javax.swing.JScrollPane scrollPane;
private javax.swing.JLayeredPane layeredPane;
private javax.swing.JTextArea textArea;
public static void main(String args[])
{
try
{
UIManager.setLookAndFeel(
"com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
}
catch (Exception e)
{
e.printStackTrace();
}
JFrame container = new JFrame();
container.setSize(800, 800);
JLayeredPane layerPanel = new JLayeredPane();
layerPanel.setSize(800, 800);
container.getContentPane().add(layerPanel);
layerPanel.setVisible(true);
JPanel colorPanel = new JPanel();
colorPanel.setSize(800,800);
colorPanel.setBackground(Color.red);
layerPanel.add(colorPanel);
layerPanel.setLayer(colorPanel, JLayeredPane.DEFAULT_LAYER);
TransparentInternalFrame frameA = new TransparentInternalFrame(layerPanel,0);
frameA.setVisible(true);
layerPanel.add(frameA);
layerPanel.setLayer(frameA, 1);
frameA.setSize(282,282);
TransparentInternalFrame frameB = new TransparentInternalFrame(layerPanel, 0);
frameB.setVisible(true);
layerPanel.add(frameB);
layerPanel.add(frameB,1);
frameB.setLocation(300, 300);
frameB.setSize(282,282);
container.repaint();
container.setVisible(true);
}
}