JTable如何改变BackGround Color [英] JTable how to change BackGround Color
本文介绍了JTable如何改变BackGround Color的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的灵感来自 MeBigFatGuy 有趣
import java.awt。*;
import java.awt.event.ActionEvent;
import java.awt.image.BufferedImage;
import javax.swing。*;
import javax.swing.RepaintManager;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.table.TableModel;
/ *
https://stackoverflow.com/questions/1249278/
how-to-disable-the-default-painting-behavior-of-wheel-scroll- event-on-jscrollpan
*
和
*
https://stackoverflow.com/questions/8195959/
swing-jtable-event-when-row- is-visible-or-when-scrolled-the-bottom
* /
公共类ViewPortFlickering {
private JFrame frame = new JFrame（Table）;
private JViewport viewport = new JViewport（）;
private Rectangle RECT = new Rectangle（）;
private Rectangle RECT1 = new Rectangle（）;
私有JTable表=新JTable（50,3）;
private javax.swing.Timer timer;
private int count = 0;
public ViewPortFlickering（）{
GradientViewPort tableViewPort = new GradientViewPort（table）;
viewport = tableViewPort.getViewport（）;
viewport.addChangeListener（new ChangeListener（）{
@Override
public void stateChanged（ChangeEvent e）{
RECT = table.getCellRect（0,0，true ）;
RECT1 = table.getCellRect（table.getRowCount（） - 1,0，true）;
Rectangle viewRect = viewport.getViewRect（）;
if（viewRect.intersects（RECT） ）{
System.out.println（Visible RECT - >+ RECT）;
} else if（viewRect.intersects（RECT1））{
System.out.println（可见RECT1 - >+ RECT1）;
}其他{
//
}
}
}）;
frame.add（tableViewPort）;
frame.setPreferredSize（new Dimension（600,300））;
frame.pack（）;
frame.setLocation（50,100）;
frame.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）;
RepaintManager.setCurrentManager（new RepaintManager（）{
@Override
public void addDirtyRegion（JComponent c，int x，int y，int w，int h）{
Container con = c.getParent（）;
while（con instanceof JComponent）{
if（！con.isVisible（））{
return;
}
if（con instanceof GradientViewPort）{
c =（JComponent）con;
x = 0;
y = 0;
w = con.getWidth（）;
h = con.getHeight （）;
}
con = con.getParent（）;
}
super.addDirtyRegion（c，x，y，w，h）;
}
}）;
frame.setVisible（true）;
start（）;
}
private void start（）{
timer = new javax.swing.Timer（100，updateCol（））;
timer.start（）;
}
public Action updateCol（）{
返回new AbstractAction（text load action）{
private static final long serialVersionUID = 1L;
@Override
public void actionPerformed（ActionEvent e）{
System.out.println（updated row+（count + 1））;
TableModel model = table.getModel（）;
int cols = model.getColumnCount（）;
int row = 0;
for（int j = 0; j< cols; j ++）{
row = count;
table.changeSelection（row，0，false，false）;
timer.setDelay（100）;
对象值=行+（计数+ 1）+项目+（j + 1）;
model.setValueAt（value，count，j）;
}
count ++;
if（count> = table.getRowCount（））{
timer.stop（）;
table.changeSelection（0,0，false，false）;
java.awt.EventQueue.invokeLater（new Runnable（）{
@Override
public void run（）{
table.clearSelection（）;
}
}）;
}
}
};
}
public static void main（String [] args）{
java.awt.EventQueue.invokeLater（new Runnable（）{
@覆盖
public void run（）{
ViewPortFlickering viewPortFlickering = new ViewPortFlickering（）;
}
}）;
}
}
class GradientViewPort扩展JScrollPane {
private static final long serialVersionUID = 1L;
private final int h = 50;
private BufferedImage img = null;
private BufferedImage shadow = new BufferedImage（1，h，BufferedImage.TYPE_INT_ARGB）;
private JViewport viewPort;
public GradientViewPort（JComponent com）{
super（com）;
viewPort = this.getViewport（）;
viewPort.setScrollMode（JViewport.BLIT_SCROLL_MODE）;
viewPort.setScrollMode（JViewport.BACKINGSTORE_SCROLL_MODE）;
viewPort.setScrollMode（JViewport.SIMPLE_SCROLL_MODE）;
Graphics2D g2 = shadow.createGraphics（）;
g2.setPaint（new Color（250,150,150））;
g2.fillRect（0,0,1，h）;
g2.setComposite（AlphaComposite.DstIn）;
g2.setPaint（new GradientPaint（0,0，new Color（0,0,0,0f），0，h，
new color（0.5f，0.8f，0.8f，0.5f） ））;
g2.fillRect（0,0,1，h）;
g2.dispose（）;
}
@Override
public void paint（Graphics g）{
if（img == null || img.getWidth（）！= getWidth（）| | img.getHeight（）！= getHeight（））{
img = new BufferedImage（getWidth（），getHeight（），BufferedImage.TYPE_INT_ARGB）;
}
Graphics2D g2 = img.createGraphics（）;
super.paint（g2）;
Rectangle bounds = getViewport（）。getVisibleRect（）;
g2.scale（bounds.getWidth（）， - 1）;
int y =（getColumnHeader（）== null）？ 0：getColumnHeader（）。getHeight（）;
g2.drawImage（shadow，bounds.x，-bounds.y - y - h，null）;
g2.scale（1，-1）;
g2.drawImage（shadow，bounds.x，bounds.y + bounds.height - h + y，null）;
g2.dispose（）;
g.drawImage（img，0,0，null）;
}
}
解决方案
自我搜索不同的建议我用关于图形的原始知识结束了这个问题
基于代码
import java.awt。*;
import java.awt.event.ActionEvent;
import java.awt.image.BufferedImage;
// import java.awt.image.ColorModel; //我不知道如何使用
// import java.awt.image.SampleModel; //我不知道如何使用
import javax.swing。*;
import javax.swing.RepaintManager;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.table.TableModel;
公共类ViewPortFlickeringOriginal {
private JFrame frame = new JFrame（Table）;
private JViewport viewport = new JViewport（）;
private Rectangle RECT = new Rectangle（）;
private Rectangle RECT1 = new Rectangle（）;
私有JTable表=新JTable（50,3）;
private javax.swing.Timer timer;
private int count = 0;
private boolean topOrBottom = false;
private GradientViewPortOriginal tableViewPort;
public ViewPortFlickeringOriginal（）{
tableViewPort = new GradientViewPortOriginal（table）;
viewport = tableViewPort.getViewport（）;
viewport.addChangeListener（new ChangeListener（）{
@Override
public void stateChanged（ChangeEvent e）{
if（tableViewPort.bolStart）{
RECT = table.getCellRect（0,0，true）;
RECT1 = table.getCellRect（table.getRowCount（） - 1,0，true）;
Rectangle viewRect = viewport.getViewRect（）;
if（viewRect.intersects（RECT））{
System.out.println（Visible RECT - >+ RECT）;
tableViewPort.paintBackGround（new Color（250,150,150） ）;
} else if（viewRect.intersects（RECT1））{
System.out.println（Visible RECT1 - >+ RECT1）;
tableViewPort.paintBackGround（new Color） （150,250,150））;
} else {
System.out.println（Visible RECT1 - > ????）;
tableViewPort.paintBackGround（new Color（150,150,250））;
}
}
}
}）;
frame.add（tableViewPort）;
frame.setPreferredSize（new Dimension（600,300））;
frame.pack（）;
frame.setLocation（50,100）;
frame.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）;
RepaintManager.setCurrentManager（new RepaintManager（）{
@Override
public void addDirtyRegion（JComponent c，int x，int y，int w，int h）{
Container con = c.getParent（）;
while（con instanceof JComponent）{
if（！con.isVisible（））{
return;
}
if（con instanceof GradientViewPortOriginal）{
c =（JComponent）con;
x = 0;
y = 0;
w = con.getWidth（）;
h = con.getHeight （）;
}
con = con.getParent（）;
}
super.addDirtyRegion（c，x，y，w，h）;
}
}）;
frame.setVisible（true）;
start（）;
}
private void start（）{
timer = new javax.swing.Timer（100，updateCol（））;
timer.start（）;
}
public Action updateCol（）{
返回new AbstractAction（text load action）{
private static final long serialVersionUID = 1L;
@Override
public void actionPerformed（ActionEvent e）{
System.out.println（updated row+（count + 1））;
TableModel model = table.getModel（）;
int cols = model.getColumnCount（）;
int row = 0;
for（int j = 0; j< cols; j ++）{
row = count;
table.changeSelection（row，0，false，false）;
timer.setDelay（100）;
对象值=行+（计数+ 1）+项目+（j + 1）;
model.setValueAt（value，count，j）;
}
count ++;
if（count> = table.getRowCount（））{
timer.stop（）;
table.changeSelection（0,0，false，false）;
java.awt.EventQueue.invokeLater（new Runnable（）{
@Override
public void run（）{
table.clearSelection（）;
tableViewPort.bolStart = true;
}
}）;
}
}
};
}
public static void main（String [] args）{
java.awt.EventQueue.invokeLater（new Runnable（）{
@覆盖
public void run（）{
ViewPortFlickeringOriginal viewPortFlickering = new ViewPortFlickeringOriginal（）;
}
}）;
}
}
class GradientViewPortOriginal扩展JScrollPane {
private static final long serialVersionUID = 1L;
private final int h = 50;
private BufferedImage img = null;
private BufferedImage shadow = new BufferedImage（1，h，BufferedImage.TYPE_INT_ARGB）;
private JViewport viewPort;
public boolean bolStart = false;
public GradientViewPortOriginal（JComponent com）{
super（com）;
viewPort = this.getViewport（）;
viewPort.setScrollMode（JViewport.BLIT_SCROLL_MODE）;
viewPort.setScrollMode（JViewport.BACKINGSTORE_SCROLL_MODE）;
viewPort.setScrollMode（JViewport.SIMPLE_SCROLL_MODE）;
paintBackGround（new Color（250,150,150））;
}
public void paintBackGround（Color g）{
Graphics2D g2 = shadow.createGraphics（）;
g2.setPaint（g）;
g2.fillRect（0,0,1，h）;
g2.setComposite（AlphaComposite.DstIn）;
g2.setPaint（new GradientPaint（0,0，new Color（0,0,0,0f），0，h，
new Color（0.1f，0.8f，0.8f，0.5f） ））;
g2.fillRect（0,0,1，h）;
g2.dispose（）;
}
@Override
public void paint（Graphics g）{
if（img == null || img.getWidth（）！= getWidth（）| | img.getHeight（）！= getHeight（））{
img = new BufferedImage（getWidth（），getHeight（），BufferedImage.TYPE_INT_ARGB）;
}
Graphics2D g2 = img.createGraphics（）;
super.paint（g2）;
Rectangle bounds = getViewport（）。getVisibleRect（）;
g2.scale（bounds.getWidth（）， - 1）;
int y =（getColumnHeader（）== null）？ 0：getColumnHeader（）。getHeight（）;
g2.drawImage（shadow，bounds.x，-bounds.y - y - h，null）;
g2.scale（1，-1）;
g2.drawImage（shadow，bounds.x，bounds.y + bounds.height - h + y，null）;
g2.dispose（）;
g.drawImage（img，0,0，null）;
}
}
I inspired by MeBigFatGuy interesting question, in this conection I have very specific question about Graphisc2D, how to change BackGround Color by depends if is JTables Row visible in the JViewPort,
1) if 1st. & last JTables Row will be visible in the JViewPort, then BackGround would be colored to the Color.red
2) if 1st. & last JTables Row will not be visible in the JViewPort, then BackGround would be colored to the Color.whatever
from SSCCE
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.image.BufferedImage;
import javax.swing.*;
import javax.swing.RepaintManager;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.table.TableModel;
/*
https://stackoverflow.com/questions/1249278/
how-to-disable-the-default-painting-behaviour-of-wheel-scroll-event-on-jscrollpan
*
and
*
https://stackoverflow.com/questions/8195959/
swing-jtable-event-when-row-is-visible-or-when-scrolled-to-the-bottom
*/
public class ViewPortFlickering {
private JFrame frame = new JFrame("Table");
private JViewport viewport = new JViewport();
private Rectangle RECT = new Rectangle();
private Rectangle RECT1 = new Rectangle();
private JTable table = new JTable(50, 3);
private javax.swing.Timer timer;
private int count = 0;
public ViewPortFlickering() {
GradientViewPort tableViewPort = new GradientViewPort(table);
viewport = tableViewPort.getViewport();
viewport.addChangeListener(new ChangeListener() {
@Override
public void stateChanged(ChangeEvent e) {
RECT = table.getCellRect(0, 0, true);
RECT1 = table.getCellRect(table.getRowCount() - 1, 0, true);
Rectangle viewRect = viewport.getViewRect();
if (viewRect.intersects(RECT)) {
System.out.println("Visible RECT -> " + RECT);
} else if (viewRect.intersects(RECT1)) {
System.out.println("Visible RECT1 -> " + RECT1);
} else {
//
}
}
});
frame.add(tableViewPort);
frame.setPreferredSize(new Dimension(600, 300));
frame.pack();
frame.setLocation(50, 100);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
RepaintManager.setCurrentManager(new RepaintManager() {
@Override
public void addDirtyRegion(JComponent c, int x, int y, int w, int h) {
Container con = c.getParent();
while (con instanceof JComponent) {
if (!con.isVisible()) {
return;
}
if (con instanceof GradientViewPort) {
c = (JComponent) con;
x = 0;
y = 0;
w = con.getWidth();
h = con.getHeight();
}
con = con.getParent();
}
super.addDirtyRegion(c, x, y, w, h);
}
});
frame.setVisible(true);
start();
}
private void start() {
timer = new javax.swing.Timer(100, updateCol());
timer.start();
}
public Action updateCol() {
return new AbstractAction("text load action") {
private static final long serialVersionUID = 1L;
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("updating row " + (count + 1));
TableModel model = table.getModel();
int cols = model.getColumnCount();
int row = 0;
for (int j = 0; j < cols; j++) {
row = count;
table.changeSelection(row, 0, false, false);
timer.setDelay(100);
Object value = "row " + (count + 1) + " item " + (j + 1);
model.setValueAt(value, count, j);
}
count++;
if (count >= table.getRowCount()) {
timer.stop();
table.changeSelection(0, 0, false, false);
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
table.clearSelection();
}
});
}
}
};
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
ViewPortFlickering viewPortFlickering = new ViewPortFlickering();
}
});
}
}
class GradientViewPort extends JScrollPane {
private static final long serialVersionUID = 1L;
private final int h = 50;
private BufferedImage img = null;
private BufferedImage shadow = new BufferedImage(1, h, BufferedImage.TYPE_INT_ARGB);
private JViewport viewPort;
public GradientViewPort(JComponent com) {
super(com);
viewPort = this.getViewport();
viewPort.setScrollMode(JViewport.BLIT_SCROLL_MODE);
viewPort.setScrollMode(JViewport.BACKINGSTORE_SCROLL_MODE);
viewPort.setScrollMode(JViewport.SIMPLE_SCROLL_MODE);
Graphics2D g2 = shadow.createGraphics();
g2.setPaint(new Color(250, 150, 150));
g2.fillRect(0, 0, 1, h);
g2.setComposite(AlphaComposite.DstIn);
g2.setPaint(new GradientPaint(0, 0, new Color(0, 0, 0, 0f), 0, h,
new Color(0.5f, 0.8f, 0.8f, 0.5f)));
g2.fillRect(0, 0, 1, h);
g2.dispose();
}
@Override
public void paint(Graphics g) {
if (img == null || img.getWidth() != getWidth() || img.getHeight() != getHeight()) {
img = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_ARGB);
}
Graphics2D g2 = img.createGraphics();
super.paint(g2);
Rectangle bounds = getViewport().getVisibleRect();
g2.scale(bounds.getWidth(), -1);
int y = (getColumnHeader() == null) ? 0 : getColumnHeader().getHeight();
g2.drawImage(shadow, bounds.x, -bounds.y - y - h, null);
g2.scale(1, -1);
g2.drawImage(shadow, bounds.x, bounds.y + bounds.height - h + y, null);
g2.dispose();
g.drawImage(img, 0, 0, null);
}
}
解决方案
since I search for different suggestion I closed this question with my original knowledges about Graphics
based on code
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.image.BufferedImage;
//import java.awt.image.ColorModel; // I don't know how to use that
//import java.awt.image.SampleModel;// I don't know how to use that
import javax.swing.*;
import javax.swing.RepaintManager;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.table.TableModel;
public class ViewPortFlickeringOriginal {
private JFrame frame = new JFrame("Table");
private JViewport viewport = new JViewport();
private Rectangle RECT = new Rectangle();
private Rectangle RECT1 = new Rectangle();
private JTable table = new JTable(50, 3);
private javax.swing.Timer timer;
private int count = 0;
private boolean topOrBottom = false;
private GradientViewPortOriginal tableViewPort;
public ViewPortFlickeringOriginal() {
tableViewPort = new GradientViewPortOriginal(table);
viewport = tableViewPort.getViewport();
viewport.addChangeListener(new ChangeListener() {
@Override
public void stateChanged(ChangeEvent e) {
if (tableViewPort.bolStart) {
RECT = table.getCellRect(0, 0, true);
RECT1 = table.getCellRect(table.getRowCount() - 1, 0, true);
Rectangle viewRect = viewport.getViewRect();
if (viewRect.intersects(RECT)) {
System.out.println("Visible RECT -> " + RECT);
tableViewPort.paintBackGround(new Color(250, 150, 150));
} else if (viewRect.intersects(RECT1)) {
System.out.println("Visible RECT1 -> " + RECT1);
tableViewPort.paintBackGround(new Color(150, 250, 150));
} else {
System.out.println("Visible RECT1 -> ???? ");
tableViewPort.paintBackGround(new Color(150, 150, 250));
}
}
}
});
frame.add(tableViewPort);
frame.setPreferredSize(new Dimension(600, 300));
frame.pack();
frame.setLocation(50, 100);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
RepaintManager.setCurrentManager(new RepaintManager() {
@Override
public void addDirtyRegion(JComponent c, int x, int y, int w, int h) {
Container con = c.getParent();
while (con instanceof JComponent) {
if (!con.isVisible()) {
return;
}
if (con instanceof GradientViewPortOriginal) {
c = (JComponent) con;
x = 0;
y = 0;
w = con.getWidth();
h = con.getHeight();
}
con = con.getParent();
}
super.addDirtyRegion(c, x, y, w, h);
}
});
frame.setVisible(true);
start();
}
private void start() {
timer = new javax.swing.Timer(100, updateCol());
timer.start();
}
public Action updateCol() {
return new AbstractAction("text load action") {
private static final long serialVersionUID = 1L;
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("updating row " + (count + 1));
TableModel model = table.getModel();
int cols = model.getColumnCount();
int row = 0;
for (int j = 0; j < cols; j++) {
row = count;
table.changeSelection(row, 0, false, false);
timer.setDelay(100);
Object value = "row " + (count + 1) + " item " + (j + 1);
model.setValueAt(value, count, j);
}
count++;
if (count >= table.getRowCount()) {
timer.stop();
table.changeSelection(0, 0, false, false);
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
table.clearSelection();
tableViewPort.bolStart = true;
}
});
}
}
};
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
ViewPortFlickeringOriginal viewPortFlickering = new ViewPortFlickeringOriginal();
}
});
}
}
class GradientViewPortOriginal extends JScrollPane {
private static final long serialVersionUID = 1L;
private final int h = 50;
private BufferedImage img = null;
private BufferedImage shadow = new BufferedImage(1, h, BufferedImage.TYPE_INT_ARGB);
private JViewport viewPort;
public boolean bolStart = false;
public GradientViewPortOriginal(JComponent com) {
super(com);
viewPort = this.getViewport();
viewPort.setScrollMode(JViewport.BLIT_SCROLL_MODE);
viewPort.setScrollMode(JViewport.BACKINGSTORE_SCROLL_MODE);
viewPort.setScrollMode(JViewport.SIMPLE_SCROLL_MODE);
paintBackGround(new Color(250, 150, 150));
}
public void paintBackGround(Color g) {
Graphics2D g2 = shadow.createGraphics();
g2.setPaint(g);
g2.fillRect(0, 0, 1, h);
g2.setComposite(AlphaComposite.DstIn);
g2.setPaint(new GradientPaint(0, 0, new Color(0, 0, 0, 0f), 0, h,
new Color(0.1f, 0.8f, 0.8f, 0.5f)));
g2.fillRect(0, 0, 1, h);
g2.dispose();
}
@Override
public void paint(Graphics g) {
if (img == null || img.getWidth() != getWidth() || img.getHeight() != getHeight()) {
img = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_ARGB);
}
Graphics2D g2 = img.createGraphics();
super.paint(g2);
Rectangle bounds = getViewport().getVisibleRect();
g2.scale(bounds.getWidth(), -1);
int y = (getColumnHeader() == null) ? 0 : getColumnHeader().getHeight();
g2.drawImage(shadow, bounds.x, -bounds.y - y - h, null);
g2.scale(1, -1);
g2.drawImage(shadow, bounds.x, bounds.y + bounds.height - h + y, null);
g2.dispose();
g.drawImage(img, 0, 0, null);
}
}
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