我怎样才能改变JTabbedPane选项卡的形状？

我正在尝试更改JTabbedPane选项卡的形状。 使用setTabComponentAt(0, someComponent); 不会更改选项卡的外观，即具有对angular左上angular的矩形。 可以做些什么来改变形状？

Answer 1

正确的方式只是改变外观和感觉 ，从Old.Java.Forums.Sun很好的例子

 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); } } 

和

 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); } } 

Answer 2

该形状由选项卡窗格的UI代表（由TabbedPaneUI而来）所支持。 MetalTabbedPaneUI子类是一个示例 ，可以帮助您决定要如何更换MetalTabbedPaneUI 。

Answer 3

您可以将html标签放入addTab方法的第一个参数中，如下所示：

MyJTabbedPane.addTab("<html><h1 style='padding:20px;'>TEST</h1></html>", new JPanel());