java 如何更改 JTabbedPane 选项卡的形状？
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时间：2020-10-30 18:28:28 来源:igfitidea点击:
How can I change the shape of a JTabbedPane tab?
提问by farm ostrich
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?
我正在尝试更改JTabbedPane. 使用setTabComponentAt(0, someComponent);不会改变选项卡的外观，它是一个左上角对角的矩形。可以做些什么来改变形状？
回答by mKorbel
correct way is only to change Look and Feel, nice example from Old.Java.Forums.Sun
正确的方法只是改变外观，很好的例子来自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
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);
}
}
回答by trashgod
The shape is under the aegis of the tabbed pane's UI delegate, which descends from TabbedPaneUI. The MetalTabbedPaneUIsubclass is an examplethat may help you decide how badly you want to replace the delegate.
该形状位于选项卡式窗格的 UI 委托的保护之下，该委托从 TabbedPaneUI. 该MetalTabbedPaneUI子类是一个例子，可以帮助你决定要如何糟糕更换委托。
回答by Mike Lowry
You can put html tags into the first parameter of addTab method as following :
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());
MyJTabbedPane.addTab("<html><h1 style='padding:20px;'>TEST</h1></html>", new JPanel());
