I am trying to change the shape of the tabs in a JTabbedPane. Using setTabComponentAt(0, someComponent); doesn't change the exterior of the tab, which is a rectangle with a diagonal top-left corner. What may be done to change the shape?
问问题
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3 回答
26
correct way is only to change Look and Feel, nice example from Old.Java.Forums.Sun
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
public class TabbedPane extends JPanel {
private static final long serialVersionUID = 1L;
public TabbedPane() {
setLayout(new BorderLayout());
JPanel jp = new JPanel();
jp.setLayout(new BorderLayout());
JTabbedPane tb = new JTabbedPane();
tb.setUI(new CustomTabbedPaneUI());
tb.add("Tab1", new JTextArea(""));
tb.add("Tab2", new JTextArea(""));
tb.add("Tab3", new JTextArea(""));
tb.add("Tab4", new JTextArea(""));
tb.add("Tab5", new JTextArea(""));
jp.add(tb, BorderLayout.CENTER);
add(jp, BorderLayout.CENTER);
tb.setEnabledAt(1, false);
tb.setEnabledAt(3, false);
}
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.getContentPane().add(new TabbedPane());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(500, 200);
frame.setVisible(true);
}
}
and
import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.*;
import javax.swing.text.View;
public class CustomTabbedPaneUI extends BasicTabbedPaneUI {
private Color selectColor;
private Color deSelectColor;
private int inclTab = 4;
private int anchoFocoV = inclTab;
private int anchoFocoH = 4;
private int anchoCarpetas = 18;
private Polygon shape;
public static ComponentUI createUI(JComponent c) {
return new CustomTabbedPaneUI();
}
@Override
protected void installDefaults() {
super.installDefaults();
selectColor = new Color(250, 192, 192);
deSelectColor = new Color(197, 193, 168);
tabAreaInsets.right = anchoCarpetas;
}
@Override
protected void paintTabArea(Graphics g, int tabPlacement, int selectedIndex) {
if (runCount > 1) {
int lines[] = new int[runCount];
for (int i = 0; i < runCount; i++) {
lines[i] = rects[tabRuns[i]].y + (tabPlacement == TOP ? maxTabHeight : 0);
}
Arrays.sort(lines);
if (tabPlacement == TOP) {
int fila = runCount;
for (int i = 0; i < lines.length - 1; i++, fila--) {
Polygon carp = new Polygon();
carp.addPoint(0, lines[i]);
carp.addPoint(tabPane.getWidth() - 2 * fila - 2, lines[i]);
carp.addPoint(tabPane.getWidth() - 2 * fila, lines[i] + 3);
if (i < lines.length - 2) {
carp.addPoint(tabPane.getWidth() - 2 * fila, lines[i + 1]);
carp.addPoint(0, lines[i + 1]);
} else {
carp.addPoint(tabPane.getWidth() - 2 * fila, lines[i] + rects[selectedIndex].height);
carp.addPoint(0, lines[i] + rects[selectedIndex].height);
}
carp.addPoint(0, lines[i]);
g.setColor(hazAlfa(fila));
g.fillPolygon(carp);
g.setColor(darkShadow.darker());
g.drawPolygon(carp);
}
} else {
int fila = 0;
for (int i = 0; i < lines.length - 1; i++, fila++) {
Polygon carp = new Polygon();
carp.addPoint(0, lines[i]);
carp.addPoint(tabPane.getWidth() - 2 * fila - 1, lines[i]);
carp.addPoint(tabPane.getWidth() - 2 * fila - 1, lines[i + 1] - 3);
carp.addPoint(tabPane.getWidth() - 2 * fila - 3, lines[i + 1]);
carp.addPoint(0, lines[i + 1]);
carp.addPoint(0, lines[i]);
g.setColor(hazAlfa(fila + 2));
g.fillPolygon(carp);
g.setColor(darkShadow.darker());
g.drawPolygon(carp);
}
}
}
super.paintTabArea(g, tabPlacement, selectedIndex);
}
@Override
protected void paintTabBackground(Graphics g, int tabPlacement, int tabIndex, int x, int y, int w, int h, boolean isSelected) {
Graphics2D g2D = (Graphics2D) g;
GradientPaint gradientShadow;
int xp[] = null; // Para la forma
int yp[] = null;
switch (tabPlacement) {
case LEFT:
xp = new int[]{x, x, x + w, x + w, x};
yp = new int[]{y, y + h - 3, y + h - 3, y, y};
gradientShadow = new GradientPaint(x, y, new Color(100, 100, 255), x, y + h, Color.ORANGE);
break;
case RIGHT:
xp = new int[]{x, x, x + w - 2, x + w - 2, x};
yp = new int[]{y, y + h - 3, y + h - 3, y, y};
gradientShadow = new GradientPaint(x, y, new Color(100, 100, 255), x, y + h, new Color(153, 186, 243));
break;
case BOTTOM:
xp = new int[]{x, x, x + 3, x + w - inclTab - 6, x + w - inclTab - 2, x + w - inclTab, x + w - 3, x};
yp = new int[]{y, y + h - 3, y + h, y + h, y + h - 1, y + h - 3, y, y};
gradientShadow = new GradientPaint(x, y, new Color(100, 100, 255), x, y + h, Color.BLUE);
break;
case TOP:
default:
xp = new int[]{x, x, x + 3, x + w - inclTab - 6, x + w - inclTab - 2, x + w - inclTab, x + w - inclTab, x};
yp = new int[]{y + h, y + 3, y, y, y + 1, y + 3, y + h, y + h};
gradientShadow = new GradientPaint(0, 0, Color.ORANGE, 0, y + h / 2, new Color(240, 255, 210));
break;
}
// ;
shape = new Polygon(xp, yp, xp.length);
if (isSelected) {
g2D.setColor(selectColor);
g2D.setPaint(gradientShadow);
} else {
if (tabPane.isEnabled() && tabPane.isEnabledAt(tabIndex)) {
g2D.setColor(deSelectColor);
GradientPaint gradientShadowTmp = new GradientPaint(0, 0, new Color(255, 255, 200), 0, y + h / 2, new Color(240, 255, 210));
g2D.setPaint(gradientShadowTmp);
} else {
GradientPaint gradientShadowTmp = new GradientPaint(0, 0, new Color(240, 255, 210), 0, y + 15 + h / 2, new Color(204, 204, 204));
g2D.setPaint(gradientShadowTmp);
}
}
//selectColor = new Color(255, 255, 200);
//deSelectColor = new Color(240, 255, 210);
g2D.fill(shape);
if (runCount > 1) {
g2D.setColor(hazAlfa(getRunForTab(tabPane.getTabCount(), tabIndex) - 1));
g2D.fill(shape);
}
g2D.fill(shape);
}
@Override
protected void paintText(Graphics g, int tabPlacement, Font font, FontMetrics metrics, int tabIndex, String title, Rectangle textRect, boolean isSelected) {
super.paintText(g, tabPlacement, font, metrics, tabIndex, title, textRect, isSelected);
g.setFont(font);
View v = getTextViewForTab(tabIndex);
if (v != null) {
// html
v.paint(g, textRect);
} else {
// plain text
int mnemIndex = tabPane.getDisplayedMnemonicIndexAt(tabIndex);
if (tabPane.isEnabled() && tabPane.isEnabledAt(tabIndex)) {
g.setColor(tabPane.getForegroundAt(tabIndex));
BasicGraphicsUtils.drawStringUnderlineCharAt(g, title, mnemIndex, textRect.x, textRect.y + metrics.getAscent());
} else { // tab disabled
g.setColor(Color.BLACK);
BasicGraphicsUtils.drawStringUnderlineCharAt(g, title, mnemIndex, textRect.x, textRect.y + metrics.getAscent());
g.setColor(tabPane.getBackgroundAt(tabIndex).darker());
BasicGraphicsUtils.drawStringUnderlineCharAt(g, title, mnemIndex, textRect.x - 1, textRect.y + metrics.getAscent() - 1);
}
}
}
/*protected void paintText(Graphics g, int tabPlacement, Font font, FontMetrics metrics, int tabIndex, String title, Rectangle textRect, boolean isSelected) {
g.setFont(font);
View v = getTextViewForTab(tabIndex);
if (v != null) {
// html
v.paint(g, textRect);
} else {
// plain text
int mnemIndex = tabPane.getDisplayedMnemonicIndexAt(tabIndex);
if (tabPane.isEnabled() && tabPane.isEnabledAt(tabIndex)) {
Color fg = tabPane.getForegroundAt(tabIndex);
if (isSelected && (fg instanceof UIResource)) {
Color selectedFG = UIManager.getColor("TabbedPane.selectedForeground");
if (selectedFG != null) {
fg = selectedFG;
}
}
g.setColor(fg);
SwingUtilities2.drawStringUnderlineCharAt(tabPane, g, title, mnemIndex, textRect.x, textRect.y + metrics.getAscent());
} else { // tab disabled
//PAY ATTENTION TO HERE
g.setColor(tabPane.getBackgroundAt(tabIndex).brighter());
SwingUtilities2.drawStringUnderlineCharAt(tabPane, g, title, mnemIndex, textRect.x, textRect.y + metrics.getAscent());
g.setColor(tabPane.getBackgroundAt(tabIndex).darker());
SwingUtilities2.drawStringUnderlineCharAt(tabPane, g, title, mnemIndex,
textRect.x - 1, textRect.y + metrics.getAscent() - 1);
}
}
}*/
@Override
protected int calculateTabWidth(int tabPlacement, int tabIndex, FontMetrics metrics) {
return 20 + inclTab + super.calculateTabWidth(tabPlacement, tabIndex, metrics);
}
@Override
protected int calculateTabHeight(int tabPlacement, int tabIndex, int fontHeight) {
if (tabPlacement == LEFT || tabPlacement == RIGHT) {
return super.calculateTabHeight(tabPlacement, tabIndex, fontHeight);
} else {
return anchoFocoH + super.calculateTabHeight(tabPlacement, tabIndex, fontHeight);
}
}
@Override
protected void paintTabBorder(Graphics g, int tabPlacement, int tabIndex, int x, int y, int w, int h, boolean isSelected) {
}
@Override
protected void paintFocusIndicator(Graphics g, int tabPlacement, Rectangle[] rects, int tabIndex, Rectangle iconRect, Rectangle textRect, boolean isSelected) {
if (tabPane.hasFocus() && isSelected) {
g.setColor(UIManager.getColor("ScrollBar.thumbShadow"));
g.drawPolygon(shape);
}
}
protected Color hazAlfa(int fila) {
int alfa = 0;
if (fila >= 0) {
alfa = 50 + (fila > 7 ? 70 : 10 * fila);
}
return new Color(0, 0, 0, alfa);
}
}
于 2011-08-14T09:39:19.220 回答
6
The shape is under the aegis of the tabbed pane's UI delegate, which descends from TabbedPaneUI. The MetalTabbedPaneUI subclass is an example that may help you decide how badly you want to replace the delegate.
于 2011-08-14T02:51:42.703 回答
2
You can put html tags into the first parameter of addTab method as following :
MyJTabbedPane.addTab("<html><h1 style='padding:20px;'>TEST</h1></html>", new JPanel());
于 2014-03-24T15:54:14.590 回答