Java example source code file (SynthTabbedPaneUI.java)
The SynthTabbedPaneUI.java Java example source code/*
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*
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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package javax.swing.plaf.synth;
import javax.swing.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.*;
import javax.swing.text.View;
import java.awt.*;
import java.awt.event.*;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import sun.swing.SwingUtilities2;
/**
* Provides the Synth L&F UI delegate for
* {@link javax.swing.JTabbedPane}.
*
* <p>Looks up the {@code selectedTabPadInsets} property from the Style,
* which represents additional insets for the selected tab.
*
* @author Scott Violet
* @since 1.7
*/
public class SynthTabbedPaneUI extends BasicTabbedPaneUI
implements PropertyChangeListener, SynthUI {
/**
* <p>If non-zero, tabOverlap indicates the amount that the tab bounds
* should be altered such that they would overlap with a tab on either the
* leading or trailing end of a run (ie: in TOP, this would be on the left
* or right).</p>
* <p>A positive overlap indicates that tabs should overlap right/down,
* while a negative overlap indicates tha tabs should overlap left/up.</p>
*
* <p>When tabOverlap is specified, it both changes the x position and width
* of the tab if in TOP or BOTTOM placement, and changes the y position and
* height if in LEFT or RIGHT placement.</p>
*
* <p>This is done for the following reason. Consider a run of 10 tabs.
* There are 9 gaps between these tabs. If you specified a tabOverlap of
* "-1", then each of the tabs "x" values will be shifted left. This leaves
* 9 pixels of space to the right of the right-most tab unpainted. So, each
* tab's width is also extended by 1 pixel to make up the difference.</p>
*
* <p>This property respects the RTL component orientation.
*/
private int tabOverlap = 0;
/**
* When a tabbed pane has multiple rows of tabs, this indicates whether
* the tabs in the upper row(s) should extend to the base of the tab area,
* or whether they should remain at their normal tab height. This does not
* affect the bounds of the tabs, only the bounds of area painted by the
* tabs. The text position does not change. The result is that the bottom
* border of the upper row of tabs becomes fully obscured by the lower tabs,
* resulting in a cleaner look.
*/
private boolean extendTabsToBase = false;
private SynthContext tabAreaContext;
private SynthContext tabContext;
private SynthContext tabContentContext;
private SynthStyle style;
private SynthStyle tabStyle;
private SynthStyle tabAreaStyle;
private SynthStyle tabContentStyle;
private Rectangle textRect = new Rectangle();
private Rectangle iconRect = new Rectangle();
private Rectangle tabAreaBounds = new Rectangle();
//added for the Nimbus look and feel, where the tab area is painted differently depending on the
//state for the selected tab
private boolean tabAreaStatesMatchSelectedTab = false;
//added for the Nimbus LAF to ensure that the labels don't move whether the tab is selected or not
private boolean nudgeSelectedLabel = true;
private boolean selectedTabIsPressed = false;
/**
* Creates a new UI object for the given component.
*
* @param c component to create UI object for
* @return the UI object
*/
public static ComponentUI createUI(JComponent c) {
return new SynthTabbedPaneUI();
}
private boolean scrollableTabLayoutEnabled() {
return (tabPane.getTabLayoutPolicy() == JTabbedPane.SCROLL_TAB_LAYOUT);
}
/**
* {@inheritDoc}
*/
@Override
protected void installDefaults() {
updateStyle(tabPane);
}
private void updateStyle(JTabbedPane c) {
SynthContext context = getContext(c, ENABLED);
SynthStyle oldStyle = style;
style = SynthLookAndFeel.updateStyle(context, this);
// Add properties other than JComponent colors, Borders and
// opacity settings here:
if (style != oldStyle) {
tabRunOverlay =
style.getInt(context, "TabbedPane.tabRunOverlay", 0);
tabOverlap = style.getInt(context, "TabbedPane.tabOverlap", 0);
extendTabsToBase = style.getBoolean(context,
"TabbedPane.extendTabsToBase", false);
textIconGap = style.getInt(context, "TabbedPane.textIconGap", 0);
selectedTabPadInsets = (Insets)style.get(context,
"TabbedPane.selectedTabPadInsets");
if (selectedTabPadInsets == null) {
selectedTabPadInsets = new Insets(0, 0, 0, 0);
}
tabAreaStatesMatchSelectedTab = style.getBoolean(context,
"TabbedPane.tabAreaStatesMatchSelectedTab", false);
nudgeSelectedLabel = style.getBoolean(context,
"TabbedPane.nudgeSelectedLabel", true);
if (oldStyle != null) {
uninstallKeyboardActions();
installKeyboardActions();
}
}
context.dispose();
if (tabContext != null) {
tabContext.dispose();
}
tabContext = getContext(c, Region.TABBED_PANE_TAB, ENABLED);
this.tabStyle = SynthLookAndFeel.updateStyle(tabContext, this);
tabInsets = tabStyle.getInsets(tabContext, null);
if (tabAreaContext != null) {
tabAreaContext.dispose();
}
tabAreaContext = getContext(c, Region.TABBED_PANE_TAB_AREA, ENABLED);
this.tabAreaStyle = SynthLookAndFeel.updateStyle(tabAreaContext, this);
tabAreaInsets = tabAreaStyle.getInsets(tabAreaContext, null);
if (tabContentContext != null) {
tabContentContext.dispose();
}
tabContentContext = getContext(c, Region.TABBED_PANE_CONTENT, ENABLED);
this.tabContentStyle = SynthLookAndFeel.updateStyle(tabContentContext,
this);
contentBorderInsets =
tabContentStyle.getInsets(tabContentContext, null);
}
/**
* {@inheritDoc}
*/
@Override
protected void installListeners() {
super.installListeners();
tabPane.addPropertyChangeListener(this);
}
/**
* {@inheritDoc}
*/
@Override
protected void uninstallListeners() {
super.uninstallListeners();
tabPane.removePropertyChangeListener(this);
}
/**
* {@inheritDoc}
*/
@Override
protected void uninstallDefaults() {
SynthContext context = getContext(tabPane, ENABLED);
style.uninstallDefaults(context);
context.dispose();
style = null;
tabStyle.uninstallDefaults(tabContext);
tabContext.dispose();
tabContext = null;
tabStyle = null;
tabAreaStyle.uninstallDefaults(tabAreaContext);
tabAreaContext.dispose();
tabAreaContext = null;
tabAreaStyle = null;
tabContentStyle.uninstallDefaults(tabContentContext);
tabContentContext.dispose();
tabContentContext = null;
tabContentStyle = null;
}
/**
* {@inheritDoc}
*/
@Override
public SynthContext getContext(JComponent c) {
return getContext(c, SynthLookAndFeel.getComponentState(c));
}
private SynthContext getContext(JComponent c, int state) {
return SynthContext.getContext(SynthContext.class, c,
SynthLookAndFeel.getRegion(c),style, state);
}
private SynthContext getContext(JComponent c, Region subregion, int state){
SynthStyle style = null;
Class klass = SynthContext.class;
if (subregion == Region.TABBED_PANE_TAB) {
style = tabStyle;
}
else if (subregion == Region.TABBED_PANE_TAB_AREA) {
style = tabAreaStyle;
}
else if (subregion == Region.TABBED_PANE_CONTENT) {
style = tabContentStyle;
}
return SynthContext.getContext(klass, c, subregion, style, state);
}
/**
* {@inheritDoc}
*/
@Override
protected JButton createScrollButton(int direction) {
// added for Nimbus LAF so that it can use the basic arrow buttons
// UIManager is queried directly here because this is called before
// updateStyle is called so the style can not be queried directly
if (UIManager.getBoolean("TabbedPane.useBasicArrows")) {
JButton btn = super.createScrollButton(direction);
btn.setBorder(BorderFactory.createEmptyBorder());
return btn;
}
return new SynthScrollableTabButton(direction);
}
/**
* {@inheritDoc}
*/
@Override
public void propertyChange(PropertyChangeEvent e) {
if (SynthLookAndFeel.shouldUpdateStyle(e)) {
updateStyle(tabPane);
}
}
/**
* {@inheritDoc}
*
* Overridden to keep track of whether the selected tab is also pressed.
*/
@Override
protected MouseListener createMouseListener() {
final MouseListener delegate = super.createMouseListener();
final MouseMotionListener delegate2 = (MouseMotionListener)delegate;
return new MouseListener() {
public void mouseClicked(MouseEvent e) { delegate.mouseClicked(e); }
public void mouseEntered(MouseEvent e) { delegate.mouseEntered(e); }
public void mouseExited(MouseEvent e) { delegate.mouseExited(e); }
public void mousePressed(MouseEvent e) {
if (!tabPane.isEnabled()) {
return;
}
int tabIndex = tabForCoordinate(tabPane, e.getX(), e.getY());
if (tabIndex >= 0 && tabPane.isEnabledAt(tabIndex)) {
if (tabIndex == tabPane.getSelectedIndex()) {
// Clicking on selected tab
selectedTabIsPressed = true;
//TODO need to just repaint the tab area!
tabPane.repaint();
}
}
//forward the event (this will set the selected index, or none at all
delegate.mousePressed(e);
}
public void mouseReleased(MouseEvent e) {
if (selectedTabIsPressed) {
selectedTabIsPressed = false;
//TODO need to just repaint the tab area!
tabPane.repaint();
}
//forward the event
delegate.mouseReleased(e);
//hack: The super method *should* be setting the mouse-over property correctly
//here, but it doesn't. That is, when the mouse is released, whatever tab is below the
//released mouse should be in rollover state. But, if you select a tab and don't
//move the mouse, this doesn't happen. Hence, forwarding the event.
delegate2.mouseMoved(e);
}
};
}
/**
* {@inheritDoc}
*/
@Override
protected int getTabLabelShiftX(int tabPlacement, int tabIndex, boolean isSelected) {
if (nudgeSelectedLabel) {
return super.getTabLabelShiftX(tabPlacement, tabIndex, isSelected);
} else {
return 0;
}
}
/**
* {@inheritDoc}
*/
@Override
protected int getTabLabelShiftY(int tabPlacement, int tabIndex, boolean isSelected) {
if (nudgeSelectedLabel) {
return super.getTabLabelShiftY(tabPlacement, tabIndex, isSelected);
} else {
return 0;
}
}
/**
* Notifies this UI delegate to repaint the specified component.
* This method paints the component background, then calls
* the {@link #paint(SynthContext,Graphics)} method.
*
* <p>In general, this method does not need to be overridden by subclasses.
* All Look and Feel rendering code should reside in the {@code paint} method.
*
* @param g the {@code Graphics} object used for painting
* @param c the component being painted
* @see #paint(SynthContext,Graphics)
*/
@Override
public void update(Graphics g, JComponent c) {
SynthContext context = getContext(c);
SynthLookAndFeel.update(context, g);
context.getPainter().paintTabbedPaneBackground(context,
g, 0, 0, c.getWidth(), c.getHeight());
paint(context, g);
context.dispose();
}
/**
* {@inheritDoc}
*/
@Override
protected int getBaseline(int tab) {
if (tabPane.getTabComponentAt(tab) != null ||
getTextViewForTab(tab) != null) {
return super.getBaseline(tab);
}
String title = tabPane.getTitleAt(tab);
Font font = tabContext.getStyle().getFont(tabContext);
FontMetrics metrics = getFontMetrics(font);
Icon icon = getIconForTab(tab);
textRect.setBounds(0, 0, 0, 0);
iconRect.setBounds(0, 0, 0, 0);
calcRect.setBounds(0, 0, Short.MAX_VALUE, maxTabHeight);
tabContext.getStyle().getGraphicsUtils(tabContext).layoutText(
tabContext, metrics, title, icon, SwingUtilities.CENTER,
SwingUtilities.CENTER, SwingUtilities.LEADING,
SwingUtilities.CENTER, calcRect,
iconRect, textRect, textIconGap);
return textRect.y + metrics.getAscent() + getBaselineOffset();
}
/**
* {@inheritDoc}
*/
@Override
public void paintBorder(SynthContext context, Graphics g, int x,
int y, int w, int h) {
context.getPainter().paintTabbedPaneBorder(context, g, x, y, w, h);
}
/**
* Paints the specified component according to the Look and Feel.
* <p>This method is not used by Synth Look and Feel.
* Painting is handled by the {@link #paint(SynthContext,Graphics)} method.
*
* @param g the {@code Graphics} object used for painting
* @param c the component being painted
* @see #paint(SynthContext,Graphics)
*/
@Override
public void paint(Graphics g, JComponent c) {
SynthContext context = getContext(c);
paint(context, g);
context.dispose();
}
/**
* Paints the specified component.
*
* @param context context for the component being painted
* @param g the {@code Graphics} object used for painting
* @see #update(Graphics,JComponent)
*/
protected void paint(SynthContext context, Graphics g) {
int selectedIndex = tabPane.getSelectedIndex();
int tabPlacement = tabPane.getTabPlacement();
ensureCurrentLayout();
// Paint tab area
// If scrollable tabs are enabled, the tab area will be
// painted by the scrollable tab panel instead.
//
if (!scrollableTabLayoutEnabled()) { // WRAP_TAB_LAYOUT
Insets insets = tabPane.getInsets();
int x = insets.left;
int y = insets.top;
int width = tabPane.getWidth() - insets.left - insets.right;
int height = tabPane.getHeight() - insets.top - insets.bottom;
int size;
switch(tabPlacement) {
case LEFT:
width = calculateTabAreaWidth(tabPlacement, runCount,
maxTabWidth);
break;
case RIGHT:
size = calculateTabAreaWidth(tabPlacement, runCount,
maxTabWidth);
x = x + width - size;
width = size;
break;
case BOTTOM:
size = calculateTabAreaHeight(tabPlacement, runCount,
maxTabHeight);
y = y + height - size;
height = size;
break;
case TOP:
default:
height = calculateTabAreaHeight(tabPlacement, runCount,
maxTabHeight);
}
tabAreaBounds.setBounds(x, y, width, height);
if (g.getClipBounds().intersects(tabAreaBounds)) {
paintTabArea(tabAreaContext, g, tabPlacement,
selectedIndex, tabAreaBounds);
}
}
// Paint content border
paintContentBorder(tabContentContext, g, tabPlacement, selectedIndex);
}
protected void paintTabArea(Graphics g, int tabPlacement,
int selectedIndex) {
// This can be invoked from ScrollabeTabPanel
Insets insets = tabPane.getInsets();
int x = insets.left;
int y = insets.top;
int width = tabPane.getWidth() - insets.left - insets.right;
int height = tabPane.getHeight() - insets.top - insets.bottom;
paintTabArea(tabAreaContext, g, tabPlacement, selectedIndex,
new Rectangle(x, y, width, height));
}
private void paintTabArea(SynthContext ss, Graphics g,
int tabPlacement, int selectedIndex,
Rectangle tabAreaBounds) {
Rectangle clipRect = g.getClipBounds();
//if the tab area's states should match that of the selected tab, then
//first update the selected tab's states, then set the state
//for the tab area to match
//otherwise, restore the tab area's state to ENABLED (which is the
//only supported state otherwise).
if (tabAreaStatesMatchSelectedTab && selectedIndex >= 0) {
updateTabContext(selectedIndex, true, selectedTabIsPressed,
(getRolloverTab() == selectedIndex),
(getFocusIndex() == selectedIndex));
ss.setComponentState(tabContext.getComponentState());
} else {
ss.setComponentState(SynthConstants.ENABLED);
}
// Paint the tab area.
SynthLookAndFeel.updateSubregion(ss, g, tabAreaBounds);
ss.getPainter().paintTabbedPaneTabAreaBackground(ss, g,
tabAreaBounds.x, tabAreaBounds.y, tabAreaBounds.width,
tabAreaBounds.height, tabPlacement);
ss.getPainter().paintTabbedPaneTabAreaBorder(ss, g, tabAreaBounds.x,
tabAreaBounds.y, tabAreaBounds.width, tabAreaBounds.height,
tabPlacement);
int tabCount = tabPane.getTabCount();
iconRect.setBounds(0, 0, 0, 0);
textRect.setBounds(0, 0, 0, 0);
// Paint tabRuns of tabs from back to front
for (int i = runCount - 1; i >= 0; i--) {
int start = tabRuns[i];
int next = tabRuns[(i == runCount - 1)? 0 : i + 1];
int end = (next != 0? next - 1: tabCount - 1);
for (int j = start; j <= end; j++) {
if (rects[j].intersects(clipRect) && selectedIndex != j) {
paintTab(tabContext, g, tabPlacement, rects, j, iconRect,
textRect);
}
}
}
if (selectedIndex >= 0) {
if (rects[selectedIndex].intersects(clipRect)) {
paintTab(tabContext, g, tabPlacement, rects, selectedIndex,
iconRect, textRect);
}
}
}
/**
* {@inheritDoc}
*/
@Override
protected void setRolloverTab(int index) {
int oldRolloverTab = getRolloverTab();
super.setRolloverTab(index);
Rectangle r = null;
if (oldRolloverTab != index && tabAreaStatesMatchSelectedTab) {
//TODO need to just repaint the tab area!
tabPane.repaint();
} else {
if ((oldRolloverTab >= 0) && (oldRolloverTab < tabPane.getTabCount())) {
r = getTabBounds(tabPane, oldRolloverTab);
if (r != null) {
tabPane.repaint(r);
}
}
if (index >= 0) {
r = getTabBounds(tabPane, index);
if (r != null) {
tabPane.repaint(r);
}
}
}
}
private void paintTab(SynthContext ss, Graphics g,
int tabPlacement, Rectangle[] rects, int tabIndex,
Rectangle iconRect, Rectangle textRect) {
Rectangle tabRect = rects[tabIndex];
int selectedIndex = tabPane.getSelectedIndex();
boolean isSelected = selectedIndex == tabIndex;
updateTabContext(tabIndex, isSelected, isSelected && selectedTabIsPressed,
(getRolloverTab() == tabIndex),
(getFocusIndex() == tabIndex));
SynthLookAndFeel.updateSubregion(ss, g, tabRect);
int x = tabRect.x;
int y = tabRect.y;
int height = tabRect.height;
int width = tabRect.width;
int placement = tabPane.getTabPlacement();
if (extendTabsToBase && runCount > 1) {
//paint this tab such that its edge closest to the base is equal to
//edge of the selected tab closest to the base. In terms of the TOP
//tab placement, this will cause the bottom of each tab to be
//painted even with the bottom of the selected tab. This is because
//in each tab placement (TOP, LEFT, BOTTOM, RIGHT) the selected tab
//is closest to the base.
if (selectedIndex >= 0) {
Rectangle r = rects[selectedIndex];
switch (placement) {
case TOP:
int bottomY = r.y + r.height;
height = bottomY - tabRect.y;
break;
case LEFT:
int rightX = r.x + r.width;
width = rightX - tabRect.x;
break;
case BOTTOM:
int topY = r.y;
height = (tabRect.y + tabRect.height) - topY;
y = topY;
break;
case RIGHT:
int leftX = r.x;
width = (tabRect.x + tabRect.width) - leftX;
x = leftX;
break;
}
}
}
tabContext.getPainter().paintTabbedPaneTabBackground(tabContext, g,
x, y, width, height, tabIndex, placement);
tabContext.getPainter().paintTabbedPaneTabBorder(tabContext, g,
x, y, width, height, tabIndex, placement);
if (tabPane.getTabComponentAt(tabIndex) == null) {
String title = tabPane.getTitleAt(tabIndex);
Font font = ss.getStyle().getFont(ss);
FontMetrics metrics = SwingUtilities2.getFontMetrics(tabPane, g, font);
Icon icon = getIconForTab(tabIndex);
layoutLabel(ss, tabPlacement, metrics, tabIndex, title, icon,
tabRect, iconRect, textRect, isSelected);
paintText(ss, g, tabPlacement, font, metrics,
tabIndex, title, textRect, isSelected);
paintIcon(g, tabPlacement, tabIndex, icon, iconRect, isSelected);
}
}
private void layoutLabel(SynthContext ss, int tabPlacement,
FontMetrics metrics, int tabIndex,
String title, Icon icon,
Rectangle tabRect, Rectangle iconRect,
Rectangle textRect, boolean isSelected ) {
View v = getTextViewForTab(tabIndex);
if (v != null) {
tabPane.putClientProperty("html", v);
}
textRect.x = textRect.y = iconRect.x = iconRect.y = 0;
ss.getStyle().getGraphicsUtils(ss).layoutText(ss, metrics, title,
icon, SwingUtilities.CENTER, SwingUtilities.CENTER,
SwingUtilities.LEADING, SwingUtilities.CENTER,
tabRect, iconRect, textRect, textIconGap);
tabPane.putClientProperty("html", null);
int xNudge = getTabLabelShiftX(tabPlacement, tabIndex, isSelected);
int yNudge = getTabLabelShiftY(tabPlacement, tabIndex, isSelected);
iconRect.x += xNudge;
iconRect.y += yNudge;
textRect.x += xNudge;
textRect.y += yNudge;
}
private void paintText(SynthContext ss,
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);
g.setColor(ss.getStyle().getColor(ss, ColorType.TEXT_FOREGROUND));
ss.getStyle().getGraphicsUtils(ss).paintText(ss, g, title,
textRect, mnemIndex);
}
}
private void paintContentBorder(SynthContext ss, Graphics g,
int tabPlacement, int selectedIndex) {
int width = tabPane.getWidth();
int height = tabPane.getHeight();
Insets insets = tabPane.getInsets();
int x = insets.left;
int y = insets.top;
int w = width - insets.right - insets.left;
int h = height - insets.top - insets.bottom;
switch(tabPlacement) {
case LEFT:
x += calculateTabAreaWidth(tabPlacement, runCount, maxTabWidth);
w -= (x - insets.left);
break;
case RIGHT:
w -= calculateTabAreaWidth(tabPlacement, runCount, maxTabWidth);
break;
case BOTTOM:
h -= calculateTabAreaHeight(tabPlacement, runCount, maxTabHeight);
break;
case TOP:
default:
y += calculateTabAreaHeight(tabPlacement, runCount, maxTabHeight);
h -= (y - insets.top);
}
SynthLookAndFeel.updateSubregion(ss, g, new Rectangle(x, y, w, h));
ss.getPainter().paintTabbedPaneContentBackground(ss, g, x, y,
w, h);
ss.getPainter().paintTabbedPaneContentBorder(ss, g, x, y, w, h);
}
private void ensureCurrentLayout() {
if (!tabPane.isValid()) {
tabPane.validate();
}
/* If tabPane doesn't have a peer yet, the validate() call will
* silently fail. We handle that by forcing a layout if tabPane
* is still invalid. See bug 4237677.
*/
if (!tabPane.isValid()) {
TabbedPaneLayout layout = (TabbedPaneLayout)tabPane.getLayout();
layout.calculateLayoutInfo();
}
}
/**
* {@inheritDoc}
*/
@Override
protected int calculateMaxTabHeight(int tabPlacement) {
FontMetrics metrics = getFontMetrics(tabContext.getStyle().getFont(
tabContext));
int tabCount = tabPane.getTabCount();
int result = 0;
int fontHeight = metrics.getHeight();
for(int i = 0; i < tabCount; i++) {
result = Math.max(calculateTabHeight(tabPlacement, i, fontHeight), result);
}
return result;
}
/**
* {@inheritDoc}
*/
@Override
protected int calculateTabWidth(int tabPlacement, int tabIndex,
FontMetrics metrics) {
Icon icon = getIconForTab(tabIndex);
Insets tabInsets = getTabInsets(tabPlacement, tabIndex);
int width = tabInsets.left + tabInsets.right;
Component tabComponent = tabPane.getTabComponentAt(tabIndex);
if (tabComponent != null) {
width += tabComponent.getPreferredSize().width;
} else {
if (icon != null) {
width += icon.getIconWidth() + textIconGap;
}
View v = getTextViewForTab(tabIndex);
if (v != null) {
// html
width += (int) v.getPreferredSpan(View.X_AXIS);
} else {
// plain text
String title = tabPane.getTitleAt(tabIndex);
width += tabContext.getStyle().getGraphicsUtils(tabContext).
computeStringWidth(tabContext, metrics.getFont(),
metrics, title);
}
}
return width;
}
/**
* {@inheritDoc}
*/
@Override
protected int calculateMaxTabWidth(int tabPlacement) {
FontMetrics metrics = getFontMetrics(tabContext.getStyle().getFont(
tabContext));
int tabCount = tabPane.getTabCount();
int result = 0;
for(int i = 0; i < tabCount; i++) {
result = Math.max(calculateTabWidth(tabPlacement, i, metrics),
result);
}
return result;
}
/**
* {@inheritDoc}
*/
@Override
protected Insets getTabInsets(int tabPlacement, int tabIndex) {
updateTabContext(tabIndex, false, false, false,
(getFocusIndex() == tabIndex));
return tabInsets;
}
/**
* {@inheritDoc}
*/
@Override
protected FontMetrics getFontMetrics() {
return getFontMetrics(tabContext.getStyle().getFont(tabContext));
}
private FontMetrics getFontMetrics(Font font) {
return tabPane.getFontMetrics(font);
}
private void updateTabContext(int index, boolean selected,
boolean isMouseDown, boolean isMouseOver, boolean hasFocus) {
int state = 0;
if (!tabPane.isEnabled() || !tabPane.isEnabledAt(index)) {
state |= SynthConstants.DISABLED;
if (selected) {
state |= SynthConstants.SELECTED;
}
}
else if (selected) {
state |= (SynthConstants.ENABLED | SynthConstants.SELECTED);
if (isMouseOver && UIManager.getBoolean("TabbedPane.isTabRollover")) {
state |= SynthConstants.MOUSE_OVER;
}
}
else if (isMouseOver) {
state |= (SynthConstants.ENABLED | SynthConstants.MOUSE_OVER);
}
else {
state = SynthLookAndFeel.getComponentState(tabPane);
state &= ~SynthConstants.FOCUSED; // don't use tabbedpane focus state
}
if (hasFocus && tabPane.hasFocus()) {
state |= SynthConstants.FOCUSED; // individual tab has focus
}
if (isMouseDown) {
state |= SynthConstants.PRESSED;
}
tabContext.setComponentState(state);
}
/**
* {@inheritDoc}
*
* Overridden to create a TabbedPaneLayout subclass which takes into
* account tabOverlap.
*/
@Override
protected LayoutManager createLayoutManager() {
if (tabPane.getTabLayoutPolicy() == JTabbedPane.SCROLL_TAB_LAYOUT) {
return super.createLayoutManager();
} else { /* WRAP_TAB_LAYOUT */
return new TabbedPaneLayout() {
@Override
public void calculateLayoutInfo() {
super.calculateLayoutInfo();
//shift all the tabs, if necessary
if (tabOverlap != 0) {
int tabCount = tabPane.getTabCount();
//left-to-right/right-to-left only affects layout
//when placement is TOP or BOTTOM
boolean ltr = tabPane.getComponentOrientation().isLeftToRight();
for (int i = runCount - 1; i >= 0; i--) {
int start = tabRuns[i];
int next = tabRuns[(i == runCount - 1)? 0 : i + 1];
int end = (next != 0? next - 1: tabCount - 1);
for (int j = start+1; j <= end; j++) {
// xshift and yshift represent the amount &
// direction to shift the tab in their
// respective axis.
int xshift = 0;
int yshift = 0;
// configure xshift and y shift based on tab
// position and ltr/rtl
switch (tabPane.getTabPlacement()) {
case JTabbedPane.TOP:
case JTabbedPane.BOTTOM:
xshift = ltr ? tabOverlap : -tabOverlap;
break;
case JTabbedPane.LEFT:
case JTabbedPane.RIGHT:
yshift = tabOverlap;
break;
default: //do nothing
}
rects[j].x += xshift;
rects[j].y += yshift;
rects[j].width += Math.abs(xshift);
rects[j].height += Math.abs(yshift);
}
}
}
}
};
}
}
private class SynthScrollableTabButton extends SynthArrowButton implements
UIResource {
public SynthScrollableTabButton(int direction) {
super(direction);
setName("TabbedPane.button");
}
}
}
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