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WebLaf is a Java Swing Look and Feel and extended components library for cross-platform applications
package com.alee.laf.menu;
import com.alee.laf.WebLookAndFeel;
import com.alee.laf.menu.IAbstractMenuItemPainter;
import com.alee.laf.menu.MenuCornerSupport;
import com.alee.laf.menu.MenuItemChangeListener;
import com.alee.laf.menu.MenuUtils;
import com.alee.painter.AbstractPainter;
import com.alee.utils.GraphicsUtils;
import com.alee.utils.LafUtils;
import com.alee.utils.MathUtils;
import com.alee.utils.SwingUtils;
import javax.swing.*;
import javax.swing.plaf.basic.BasicHTML;
import javax.swing.plaf.basic.BasicMenuItemUI;
import javax.swing.text.View;
import java.awt.*;
import java.util.Map;
/**
* @author Alexandr Zernov
*/
public abstract class AbstractMenuItemPainter extends AbstractPainter
implements IAbstractMenuItemPainter, MenuCornerSupport
{
/**
* Style settings.
*/
protected int acceleratorGap = 15;
protected int iconAlignment = SwingConstants.CENTER;
protected Color disabledFg = Color.LIGHT_GRAY;
protected Color selectedTopBg = new Color ( 208, 208, 198 );
protected Color selectedBottomBg = new Color ( 196, 196, 186 );
protected Color acceleratorBg = new Color ( 255, 255, 255, 200 );
protected Color acceleratorFg = new Color ( 90, 90, 90 );
protected Color acceleratorDisabledFg = new Color ( 170, 170, 170 );
protected boolean alignTextToMenuIcons = true;
/**
* Listeners.
*/
protected MenuItemChangeListener buttonModelChangeListener;
/**
* Runtime variables.
*/
protected Font acceleratorFont = null;
@Override
public void install ( final E c, final U ui )
{
super.install ( c, ui );
// Setting accelerator font.
setAcceleratorFont ();
// Button model change listener
buttonModelChangeListener = MenuItemChangeListener.install ( component );
}
@Override
public void uninstall ( final E c, final U ui )
{
// Removing listeners
MenuItemChangeListener.uninstall ( buttonModelChangeListener, component );
buttonModelChangeListener = null;
super.uninstall ( c, ui );
}
@Override
public void paint ( final Graphics2D g2d, final Rectangle bounds, final E c, final U ui )
{
final Object aa = GraphicsUtils.setupAntialias ( g2d );
final int w = component.getWidth ();
final int h = component.getHeight ();
final Insets bi = component.getInsets ();
final int y = bi.top;
final int ih = h - bi.top - bi.bottom;
// Painting background
final ButtonModel model = component.getModel ();
final boolean selected = component.isEnabled () && ( model.isArmed () || model.isSelected () );
paintBackground ( g2d, selected );
// Painting icon
final int iconPlaceholderWidth = MenuUtils.getIconPlaceholderWidth ( component, alignTextToMenuIcons );
final int gap = iconPlaceholderWidth > 0 ? component.getIconTextGap () : 0;
int x = ltr ? bi.left : w - bi.right - iconPlaceholderWidth;
paintIcon ( g2d, x, y, iconPlaceholderWidth, ih, selected );
x += ltr ? iconPlaceholderWidth + gap : -gap;
// Painting text and accelerator
final String text = component.getText ();
final boolean hasText = text != null && text.length () > 0;
final String accText = MenuUtils.getAcceleratorText ( component );
final boolean hasAccelerator = accText != null;
if ( hasText || hasAccelerator )
{
final Map hints = SwingUtils.setupTextAntialias ( g2d );
if ( hasText )
{
// Painting text
final FontMetrics fm = component.getFontMetrics ( component.getFont () );
final View html = ( View ) component.getClientProperty ( BasicHTML.propertyKey );
final int tw = html != null ? ( int ) html.getPreferredSpan ( View.X_AXIS ) : fm.stringWidth ( text );
x -= ltr ? 0 : tw;
paintText ( g2d, fm, x, y, tw, ih, selected );
}
if ( hasAccelerator )
{
// Painting accelerator text
final FontMetrics afm = component.getFontMetrics ( acceleratorFont );
final int aw = afm.stringWidth ( accText );
x = ltr ? w - bi.right - aw : bi.left;
paintAcceleratorText ( g2d, accText, afm, x, y, aw, ih, selected );
}
SwingUtils.restoreTextAntialias ( g2d, hints );
}
GraphicsUtils.restoreAntialias ( g2d, aa );
}
/**
* Paints menu item background.
*
* @param g2d graphics context
* @param selected whether menu item is selected or not
*/
protected void paintBackground ( final Graphics2D g2d, final boolean selected )
{
if ( selected )
{
g2d.setPaint ( new GradientPaint ( 0, 0, selectedTopBg, 0, component.getHeight (), selectedBottomBg ) );
g2d.fillRect ( 0, 0, component.getWidth (), component.getHeight () );
}
}
/**
* Paints menu item icon.
*
* @param g2d graphics context
* @param x icon placeholder X coordinate
* @param y icon placeholder Y coordinate
* @param w icon placeholder width
* @param h icon placeholder height
* @param selected whether menu item is selected or not
*/
protected void paintIcon ( final Graphics2D g2d, final int x, final int y, final int w, final int h, final boolean selected )
{
final boolean enabled = component.isEnabled ();
final Icon icon = component.isSelected () && component.getSelectedIcon () != null ?
enabled ? component.getSelectedIcon () : component.getDisabledSelectedIcon () :
enabled ? component.getIcon () : component.getDisabledIcon ();
if ( icon != null )
{
final boolean left = ltr ? iconAlignment == SwingConstants.LEFT || iconAlignment == SwingConstants.LEADING :
iconAlignment == SwingConstants.RIGHT || iconAlignment == SwingConstants.TRAILING;
final boolean center = iconAlignment == SwingConstants.CENTER;
final int iconX = left ? x : center ? x + w / 2 - icon.getIconWidth () / 2 : x + w - icon.getIconWidth ();
icon.paintIcon ( component, g2d, iconX, y + h / 2 - icon.getIconHeight () / 2 );
}
}
/**
* Paints menu item text.
*
* @param g2d graphics context
* @param fm text font metrics
* @param x text X coordinate
* @param y text rectangle Y coordinate
* @param w text width
* @param h text rectangle height
* @param selected whether menu item is selected or not
*/
@SuppressWarnings ( "UnusedParameters" )
protected void paintText ( final Graphics2D g2d, final FontMetrics fm, final int x, final int y, final int w, final int h,
final boolean selected )
{
g2d.setPaint ( component.isEnabled () ? component.getForeground () : disabledFg );
final Font oldFont = GraphicsUtils.setupFont ( g2d, component.getFont () );
final View html = ( View ) component.getClientProperty ( BasicHTML.propertyKey );
if ( html != null )
{
html.paint ( g2d, new Rectangle ( x, y, w, h ) );
}
else
{
final int mnemonic = WebLookAndFeel.isMnemonicHidden () ? -1 : component.getDisplayedMnemonicIndex ();
SwingUtils
.drawStringUnderlineCharAt ( g2d, component.getText (), mnemonic, x, y + h / 2 + LafUtils.getTextCenterShiftY ( fm ) );
}
GraphicsUtils.restoreFont ( g2d, oldFont );
}
/**
* Paints menu item accelerator text.
*
* @param g2d graphics context
* @param accText accelerator text
* @param fm accelerator text font metrics
* @param x accelerator text X coordinate
* @param y accelerator text rectangle Y coordinate
* @param w accelerator text width
* @param h accelerator text rectangle height
* @param selected whether menu item is selected or not
*/
protected void paintAcceleratorText ( final Graphics2D g2d, final String accText, final FontMetrics fm, final int x, final int y,
final int w, final int h, final boolean selected )
{
if ( selected && acceleratorBg != null )
{
final int th = fm.getHeight ();
g2d.setPaint ( acceleratorBg );
g2d.fillRoundRect ( x - 3, y + h / 2 - th / 2, w + 6, th, 4, 4 );
}
final Font oldFont = GraphicsUtils.setupFont ( g2d, acceleratorFont );
g2d.setPaint ( component.isEnabled () ? acceleratorFg : acceleratorDisabledFg );
g2d.drawString ( accText, x, y + h / 2 + LafUtils.getTextCenterShiftY ( fm ) );
GraphicsUtils.restoreFont ( g2d, oldFont );
}
/**
* Sets accelerator font.
*/
protected void setAcceleratorFont ()
{
acceleratorFont = UIManager.getFont ( "MenuItem.acceleratorFont" );
// use default if missing so that BasicMenuItemUI can be used in other
// LAFs like Nimbus
if ( acceleratorFont == null )
{
acceleratorFont = UIManager.getFont ( "MenuItem.font" );
}
}
@Override
public Rectangle getSelectedBounds ()
{
// todo Implement corner support
return SwingUtils.getRelativeBounds ( component, component.getParent () );
}
@Override
public void fillCorner ( final Graphics2D g2d, final Rectangle clip, final Shape corner, final int cornerSide )
{
// todo Implement corner support
}
@Override
public Dimension getPreferredSize ()
{
final Insets bi = component.getInsets ();
final FontMetrics fm = component.getFontMetrics ( component.getFont () );
final FontMetrics afm = component.getFontMetrics ( acceleratorFont );
// Icon
final int iconPlaceholderWidth = MenuUtils.getIconPlaceholderWidth ( component, alignTextToMenuIcons );
// Text
final View html = ( View ) component.getClientProperty ( BasicHTML.propertyKey );
final int textWidth;
final int textHeight;
if ( html != null )
{
// Text is HTML
textWidth = ( int ) html.getPreferredSpan ( View.X_AXIS );
textHeight = ( int ) html.getPreferredSpan ( View.Y_AXIS );
}
else
{
// Text isn't HTML
final String text = component.getText ();
textWidth = text != null && text.length () > 0 ? fm.stringWidth ( text ) : 0;
textHeight = fm.getHeight ();
}
// Icon-Text gap
final int gap = textWidth > 0 && iconPlaceholderWidth > 0 ? component.getIconTextGap () : 0;
// Acceleration text and its gap
final String accelerationText = MenuUtils.getAcceleratorText ( component );
final int accWidth = accelerationText != null ? acceleratorGap + afm.stringWidth ( accelerationText ) : 0;
// Content height
final int iconHeight = component.getIcon () != null ? component.getIcon ().getIconHeight () : 0;
final int contentHeight = MathUtils.max ( iconHeight, textHeight, afm.getHeight () );
return new Dimension ( bi.left + iconPlaceholderWidth + gap + textWidth + accWidth + bi.right, bi.top + contentHeight + bi.bottom );
}
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