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dragonwell8_jdk
提交 94553eda 编写于 作者: R rupashka
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6709530: There are unnecessary code in slider classes, such as in JSlider and SliderUIs 

Summary: Removed unnecessary code like unused variables, castings, imports etc
Reviewed-by: peterz
上级 80060ce8
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内联 并排
Showing with 39 addition and 74 deletion
src/share/classes/javax/swing/JSlider.java
浏览文件 @ 94553eda
......@@ -25,14 +25,12 @@
package javax.swing;
import javax.swing.border.*;
import javax.swing.event.*;
import javax.swing.plaf.*;
import javax.accessibility.*;
import java.io.Serializable;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import java.io.IOException;
import java.awt.Color;
......@@ -409,8 +407,7 @@ public class JSlider extends JComponent implements SwingConstants, Accessible {
* @since 1.4
*/
public ChangeListener[] getChangeListeners() {
return (ChangeListener[])listenerList.getListeners(
ChangeListener.class);
return listenerList.getListeners(ChangeListener.class);
}
......@@ -826,17 +823,16 @@ public class JSlider extends JComponent implements SwingConstants, Accessible {
* @see JComponent#updateUI
*/
protected void updateLabelUIs() {
if ( getLabelTable() == null ) {
Dictionary labelTable = getLabelTable();
if (labelTable == null) {
return;
}
Enumeration labels = getLabelTable().keys();
Enumeration labels = labelTable.keys();
while ( labels.hasMoreElements() ) {
Object value = getLabelTable().get( labels.nextElement() );
if ( value instanceof JComponent ) {
JComponent component = (JComponent)value;
JComponent component = (JComponent) labelTable.get(labels.nextElement());
component.updateUI();
component.setSize( component.getPreferredSize() );
}
component.setSize(component.getPreferredSize());
}
}
......@@ -845,14 +841,11 @@ public class JSlider extends JComponent implements SwingConstants, Accessible {
if (labelTable != null) {
Enumeration labels = labelTable.elements();
while (labels.hasMoreElements()) {
Object value = labels.nextElement();
if (value instanceof JComponent) {
JComponent component = (JComponent)value;
JComponent component = (JComponent) labels.nextElement();
component.setSize(component.getPreferredSize());
}
}
}
}
/**
......@@ -960,14 +953,14 @@ public class JSlider extends JComponent implements SwingConstants, Accessible {
if ( e.getPropertyName().equals( "minimum" ) ||
e.getPropertyName().equals( "maximum" ) ) {
Enumeration keys = getLabelTable().keys();
Object key = null;
Dictionary labelTable = getLabelTable();
Enumeration keys = labelTable.keys();
Hashtable hashtable = new Hashtable();
// Save the labels that were added by the developer
while ( keys.hasMoreElements() ) {
key = keys.nextElement();
Object value = getLabelTable().get( key );
Object key = keys.nextElement();
Object value = labelTable.get(key);
if ( !(value instanceof LabelUIResource) ) {
hashtable.put( key, value );
}
......@@ -979,7 +972,7 @@ public class JSlider extends JComponent implements SwingConstants, Accessible {
// Add the saved labels
keys = hashtable.keys();
while ( keys.hasMoreElements() ) {
key = keys.nextElement();
Object key = keys.nextElement();
put( key, hashtable.get( key ) );
}
......@@ -996,8 +989,10 @@ public class JSlider extends JComponent implements SwingConstants, Accessible {
SmartHashtable table = new SmartHashtable( increment, start );
if ( getLabelTable() != null && (getLabelTable() instanceof PropertyChangeListener) ) {
removePropertyChangeListener( (PropertyChangeListener)getLabelTable() );
Dictionary labelTable = getLabelTable();
if (labelTable != null && (labelTable instanceof PropertyChangeListener)) {
removePropertyChangeListener((PropertyChangeListener) labelTable);
}
addPropertyChangeListener( table );
......
src/share/classes/javax/swing/plaf/basic/BasicSliderUI.java
浏览文件 @ 94553eda
......@@ -26,14 +26,11 @@
package javax.swing.plaf.basic;
import java.awt.Component;
import java.awt.Container;
import java.awt.Adjustable;
import java.awt.event.*;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Point;
import java.awt.Insets;
import java.awt.Color;
import java.awt.IllegalComponentStateException;
......@@ -42,8 +39,6 @@ import java.beans.*;
import java.util.Dictionary;
import java.util.Enumeration;
import javax.swing.border.AbstractBorder;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.plaf.*;
......@@ -409,7 +404,7 @@ public class BasicSliderUI extends SliderUI{
Enumeration elements = dictionary.elements();
int baseline = -1;
while (elements.hasMoreElements()) {
Component label = (Component)elements.nextElement();
JComponent label = (JComponent) elements.nextElement();
Dimension pref = label.getPreferredSize();
int labelBaseline = label.getBaseline(pref.width,
pref.height);
......@@ -634,7 +629,7 @@ public class BasicSliderUI extends SliderUI{
protected void calculateTrackRect() {
int centerSpacing = 0; // used to center sliders added using BorderLayout.CENTER (bug 4275631)
int centerSpacing; // used to center sliders added using BorderLayout.CENTER (bug 4275631)
if ( slider.getOrientation() == JSlider.HORIZONTAL ) {
centerSpacing = thumbRect.height;
if ( slider.getPaintTicks() ) centerSpacing += getTickLength();
......@@ -764,7 +759,7 @@ public class BasicSliderUI extends SliderUI{
if ( dictionary != null ) {
Enumeration keys = dictionary.keys();
while ( keys.hasMoreElements() ) {
Component label = (Component)dictionary.get( keys.nextElement() );
JComponent label = (JComponent) dictionary.get(keys.nextElement());
widest = Math.max( label.getPreferredSize().width, widest );
}
}
......@@ -777,7 +772,7 @@ public class BasicSliderUI extends SliderUI{
if ( dictionary != null ) {
Enumeration keys = dictionary.keys();
while ( keys.hasMoreElements() ) {
Component label = (Component)dictionary.get( keys.nextElement() );
JComponent label = (JComponent) dictionary.get(keys.nextElement());
tallest = Math.max( label.getPreferredSize().height, tallest );
}
}
......@@ -1001,22 +996,14 @@ public class BasicSliderUI extends SliderUI{
public void paintTicks(Graphics g) {
Rectangle tickBounds = tickRect;
int i;
int maj, min, max;
int w = tickBounds.width;
int h = tickBounds.height;
int centerEffect, tickHeight;
g.setColor(DefaultLookup.getColor(slider, this, "Slider.tickColor", Color.black));
maj = slider.getMajorTickSpacing();
min = slider.getMinorTickSpacing();
if ( slider.getOrientation() == JSlider.HORIZONTAL ) {
g.translate( 0, tickBounds.y);
int value = slider.getMinimum();
int xPos = 0;
int xPos;
if ( slider.getMinorTickSpacing() > 0 ) {
while ( value <= slider.getMaximum() ) {
......@@ -1042,7 +1029,7 @@ public class BasicSliderUI extends SliderUI{
g.translate(tickBounds.x, 0);
int value = slider.getMinimum();
int yPos = 0;
int yPos;
if ( slider.getMinorTickSpacing() > 0 ) {
int offset = 0;
......@@ -1111,10 +1098,9 @@ public class BasicSliderUI extends SliderUI{
Integer key = (Integer)keys.nextElement();
int value = key.intValue();
if (value >= minValue && value <= maxValue) {
Component label = (Component)dictionary.get( key );
if (label instanceof JComponent) {
((JComponent)label).setEnabled(enabled);
}
JComponent label = (JComponent) dictionary.get(key);
label.setEnabled(enabled);
if ( slider.getOrientation() == JSlider.HORIZONTAL ) {
g.translate( 0, labelBounds.y );
paintHorizontalLabel( g, value, label );
......@@ -1364,7 +1350,7 @@ public class BasicSliderUI extends SliderUI{
int min = slider.getMinimum();
int max = slider.getMaximum();
double valueRange = (double)max - (double)min;
double pixelsPerValue = (double)trackHeight / (double)valueRange;
double pixelsPerValue = (double)trackHeight / valueRange;
int trackBottom = trackY + (trackHeight - 1);
int yPosition;
......@@ -1715,7 +1701,7 @@ public class BasicSliderUI extends SliderUI{
* of the thumb relative to the origin of the track.
*/
public void mouseDragged(MouseEvent e) {
int thumbMiddle = 0;
int thumbMiddle;
if (!slider.isEnabled()) {
return;
......@@ -1841,7 +1827,7 @@ public class BasicSliderUI extends SliderUI{
public void componentResized(ComponentEvent e) {
getHandler().componentResized(e);
}
};
}
/**
* Focus-change listener.
......@@ -1903,7 +1889,7 @@ public class BasicSliderUI extends SliderUI{
return b;
}
};
}
/**
......
src/share/classes/javax/swing/plaf/synth/SynthSliderUI.java
浏览文件 @ 94553eda
......@@ -25,26 +25,17 @@
package javax.swing.plaf.synth;
import java.awt.Component;
import java.awt.Container;
import java.awt.Adjustable;
import java.awt.event.*;
import java.awt.Graphics;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Rectangle;
import java.awt.Point;
import java.awt.Insets;
import java.awt.Color;
import java.awt.IllegalComponentStateException;
import java.awt.Polygon;
import java.beans.*;
import java.util.Dictionary;
import java.util.Enumeration;
import javax.swing.border.AbstractBorder;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.BasicSliderUI;
import sun.swing.plaf.synth.SynthUI;
......@@ -203,8 +194,7 @@ class SynthSliderUI extends BasicSliderUI implements PropertyChangeListener,
centerY += valueHeight + 2;
centerY += trackHeight + trackInsets.top + trackInsets.bottom;
centerY += tickHeight + 2;
Component label = (Component)slider.getLabelTable().
elements().nextElement();
JComponent label = (JComponent) slider.getLabelTable().elements().nextElement();
Dimension pref = label.getPreferredSize();
return centerY + label.getBaseline(pref.width, pref.height);
}
......@@ -226,8 +216,7 @@ class SynthSliderUI extends BasicSliderUI implements PropertyChangeListener,
int trackHeight = contentHeight - valueHeight;
int yPosition = yPositionForValue(value.intValue(), trackY,
trackHeight);
Component label = (Component)slider.getLabelTable().
get(value);
JComponent label = (JComponent) slider.getLabelTable().get(value);
Dimension pref = label.getPreferredSize();
return yPosition - pref.height / 2 +
label.getBaseline(pref.width, pref.height);
......@@ -434,16 +423,14 @@ class SynthSliderUI extends BasicSliderUI implements PropertyChangeListener,
/**
* Calculates the pad for the label at the specified index.
*
* @param index index of the label to calculate pad for.
* @param i index of the label to calculate pad for.
* @return padding required to keep label visible.
*/
private int getPadForLabel(int i) {
Dictionary dictionary = slider.getLabelTable();
int pad = 0;
Object o = dictionary.get(i);
if (o != null) {
Component c = (Component)o;
JComponent c = (JComponent) slider.getLabelTable().get(i);
if (c != null) {
int centerX = xPositionForValue(i);
int cHalfWidth = c.getPreferredSize().width / 2;
if (centerX - cHalfWidth < insetCache.left) {
......@@ -500,8 +487,6 @@ class SynthSliderUI extends BasicSliderUI implements PropertyChangeListener,
}
}
private static Rectangle unionRect = new Rectangle();
public void setThumbLocation(int x, int y) {
super.setThumbLocation(x, y);
// Value rect is tied to the thumb location. We need to repaint when
......@@ -544,7 +529,7 @@ class SynthSliderUI extends BasicSliderUI implements PropertyChangeListener,
trackBorder;
int trackLength = trackBottom - trackTop;
double valueRange = (double)max - (double)min;
double pixelsPerValue = (double)trackLength / (double)valueRange;
double pixelsPerValue = (double)trackLength / valueRange;
int yPosition;
if (!drawInverted()) {
......@@ -802,8 +787,7 @@ class SynthSliderUI extends BasicSliderUI implements PropertyChangeListener,
}
public void mouseDragged(MouseEvent e) {
SynthScrollBarUI ui;
int thumbMiddle = 0;
int thumbMiddle;
if (!slider.isEnabled()) {
return;
......
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