/*
* Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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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.Dimension;
import java.awt.Rectangle;
import java.awt.Insets;
import java.awt.Graphics;
import java.awt.FontMetrics;
import java.beans.PropertyChangeEvent;
/**
* Provides the Synth L&F UI delegate for
* {@link javax.swing.JLabel}.
*
* @author Scott Violet
* @since 1.7
*/
public class SynthLabelUI extends BasicLabelUI implements SynthUI {
private SynthStyle style;
/**
* Returns the LabelUI implementation used for the skins look and feel.
*
* @param c component to create UI object for
* @return the UI object
*/
public static ComponentUI createUI(JComponent c){
return new SynthLabelUI();
}
/**
* {@inheritDoc}
*/
@Override
protected void installDefaults(JLabel c) {
updateStyle(c);
}
void updateStyle(JLabel c) {
SynthContext context = getContext(c, ENABLED);
style = SynthLookAndFeel.updateStyle(context, this);
context.dispose();
}
/**
* {@inheritDoc}
*/
@Override
protected void uninstallDefaults(JLabel c){
SynthContext context = getContext(c, ENABLED);
style.uninstallDefaults(context);
context.dispose();
style = null;
}
/**
* {@inheritDoc}
*/
@Override
public SynthContext getContext(JComponent c) {
return getContext(c, getComponentState(c));
}
private SynthContext getContext(JComponent c, int state) {
return SynthContext.getContext(c, style, state);
}
private int getComponentState(JComponent c) {
int state = SynthLookAndFeel.getComponentState(c);
if (SynthLookAndFeel.getSelectedUI() == this &&
state == SynthConstants.ENABLED) {
state = SynthLookAndFeel.getSelectedUIState() | SynthConstants.ENABLED;
}
return state;
}
/**
* {@inheritDoc}
*/
@Override
public int getBaseline(JComponent c, int width, int height) {
if (c == null) {
throw new NullPointerException("Component must be non-null");
}
if (width < 0 || height < 0) {
throw new IllegalArgumentException(
"Width and height must be >= 0");
}
JLabel label = (JLabel)c;
String text = label.getText();
if (text == null || "".equals(text)) {
return -1;
}
Insets i = label.getInsets();
Rectangle viewRect = new Rectangle();
Rectangle textRect = new Rectangle();
Rectangle iconRect = new Rectangle();
viewRect.x = i.left;
viewRect.y = i.top;
viewRect.width = width - (i.right + viewRect.x);
viewRect.height = height - (i.bottom + viewRect.y);
// layout the text and icon
SynthContext context = getContext(label);
FontMetrics fm = context.getComponent().getFontMetrics(
context.getStyle().getFont(context));
context.getStyle().getGraphicsUtils(context).layoutText(
context, fm, label.getText(), label.getIcon(),
label.getHorizontalAlignment(), label.getVerticalAlignment(),
label.getHorizontalTextPosition(), label.getVerticalTextPosition(),
viewRect, iconRect, textRect, label.getIconTextGap());
View view = (View)label.getClientProperty(BasicHTML.propertyKey);
int baseline;
if (view != null) {
baseline = BasicHTML.getHTMLBaseline(view, textRect.width,
textRect.height);
if (baseline >= 0) {
baseline += textRect.y;
}
}
else {
baseline = textRect.y + fm.getAscent();
}
context.dispose();
return baseline;
}
/**
* 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().paintLabelBackground(context,
g, 0, 0, c.getWidth(), c.getHeight());
paint(context, g);
context.dispose();
}
/**
* 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) {
JLabel label = (JLabel)context.getComponent();
Icon icon = (label.isEnabled()) ? label.getIcon() :
label.getDisabledIcon();
g.setColor(context.getStyle().getColor(context,
ColorType.TEXT_FOREGROUND));
g.setFont(style.getFont(context));
context.getStyle().getGraphicsUtils(context).paintText(
context, g, label.getText(), icon,
label.getHorizontalAlignment(), label.getVerticalAlignment(),
label.getHorizontalTextPosition(), label.getVerticalTextPosition(),
label.getIconTextGap(), label.getDisplayedMnemonicIndex(), 0);
}
/**
* {@inheritDoc}
*/
@Override
public void paintBorder(SynthContext context, Graphics g, int x,
int y, int w, int h) {
context.getPainter().paintLabelBorder(context, g, x, y, w, h);
}
/**
* {@inheritDoc}
*/
@Override
public Dimension getPreferredSize(JComponent c) {
JLabel label = (JLabel)c;
Icon icon = (label.isEnabled()) ? label.getIcon() :
label.getDisabledIcon();
SynthContext context = getContext(c);
Dimension size = context.getStyle().getGraphicsUtils(context).
getPreferredSize(
context, context.getStyle().getFont(context), label.getText(),
icon, label.getHorizontalAlignment(),
label.getVerticalAlignment(), label.getHorizontalTextPosition(),
label.getVerticalTextPosition(), label.getIconTextGap(),
label.getDisplayedMnemonicIndex());
context.dispose();
return size;
}
/**
* {@inheritDoc}
*/
@Override
public Dimension getMinimumSize(JComponent c) {
JLabel label = (JLabel)c;
Icon icon = (label.isEnabled()) ? label.getIcon() :
label.getDisabledIcon();
SynthContext context = getContext(c);
Dimension size = context.getStyle().getGraphicsUtils(context).
getMinimumSize(
context, context.getStyle().getFont(context), label.getText(),
icon, label.getHorizontalAlignment(),
label.getVerticalAlignment(), label.getHorizontalTextPosition(),
label.getVerticalTextPosition(), label.getIconTextGap(),
label.getDisplayedMnemonicIndex());
context.dispose();
return size;
}
/**
* {@inheritDoc}
*/
@Override
public Dimension getMaximumSize(JComponent c) {
JLabel label = (JLabel)c;
Icon icon = (label.isEnabled()) ? label.getIcon() :
label.getDisabledIcon();
SynthContext context = getContext(c);
Dimension size = context.getStyle().getGraphicsUtils(context).
getMaximumSize(
context, context.getStyle().getFont(context), label.getText(),
icon, label.getHorizontalAlignment(),
label.getVerticalAlignment(), label.getHorizontalTextPosition(),
label.getVerticalTextPosition(), label.getIconTextGap(),
label.getDisplayedMnemonicIndex());
context.dispose();
return size;
}
/**
* {@inheritDoc}
*/
@Override
public void propertyChange(PropertyChangeEvent e) {
super.propertyChange(e);
if (SynthLookAndFeel.shouldUpdateStyle(e)) {
updateStyle((JLabel)e.getSource());
}
}
}