Java example source code file (SynthSliderUI.java)
The SynthSliderUI.java Java example source code
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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*
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* 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 java.awt.event.*;
import java.awt.Graphics;
import java.awt.Dimension;
import java.awt.FontMetrics;
import java.awt.Rectangle;
import java.awt.Point;
import java.awt.Insets;
import java.beans.*;
import java.util.Dictionary;
import java.util.Enumeration;
import javax.swing.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.BasicSliderUI;
import sun.swing.SwingUtilities2;
/**
* Provides the Synth L&F UI delegate for
* {@link JSlider}.
*
* @author Joshua Outwater
* @since 1.7
*/
public class SynthSliderUI extends BasicSliderUI
implements PropertyChangeListener, SynthUI {
private Rectangle valueRect = new Rectangle();
private boolean paintValue;
/**
* When a JSlider is used as a renderer in a JTable, its layout is not
* being recomputed even though the size is changing. Even though there
* is a ComponentListener installed, it is not being notified. As such,
* at times when being asked to paint the layout should first be redone.
* At the end of the layout method we set this lastSize variable, which
* represents the size of the slider the last time it was layed out.
*
* In the paint method we then check to see that this is accurate, that
* the slider has not changed sizes since being last layed out. If necessary
* we recompute the layout.
*/
private Dimension lastSize;
private int trackHeight;
private int trackBorder;
private int thumbWidth;
private int thumbHeight;
private SynthStyle style;
private SynthStyle sliderTrackStyle;
private SynthStyle sliderThumbStyle;
/** Used to determine the color to paint the thumb. */
private transient boolean thumbActive; //happens on rollover, and when pressed
private transient boolean thumbPressed; //happens when mouse was depressed while over thumb
///////////////////////////////////////////////////
// ComponentUI Interface Implementation methods
///////////////////////////////////////////////////
/**
* 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 SynthSliderUI((JSlider)c);
}
protected SynthSliderUI(JSlider c) {
super(c);
}
/**
* {@inheritDoc}
*/
@Override
protected void installDefaults(JSlider slider) {
updateStyle(slider);
}
/**
* Uninstalls default setting. This method is called when a
* {@code LookAndFeel} is uninstalled.
*/
protected void uninstallDefaults(JSlider slider) {
SynthContext context = getContext(slider, ENABLED);
style.uninstallDefaults(context);
context.dispose();
style = null;
context = getContext(slider, Region.SLIDER_TRACK, ENABLED);
sliderTrackStyle.uninstallDefaults(context);
context.dispose();
sliderTrackStyle = null;
context = getContext(slider, Region.SLIDER_THUMB, ENABLED);
sliderThumbStyle.uninstallDefaults(context);
context.dispose();
sliderThumbStyle = null;
}
/**
* {@inheritDoc}
*/
@Override
protected void installListeners(JSlider slider) {
super.installListeners(slider);
slider.addPropertyChangeListener(this);
}
/**
* {@inheritDoc}
*/
@Override
protected void uninstallListeners(JSlider slider) {
slider.removePropertyChangeListener(this);
super.uninstallListeners(slider);
}
private void updateStyle(JSlider c) {
SynthContext context = getContext(c, ENABLED);
SynthStyle oldStyle = style;
style = SynthLookAndFeel.updateStyle(context, this);
if (style != oldStyle) {
thumbWidth =
style.getInt(context, "Slider.thumbWidth", 30);
thumbHeight =
style.getInt(context, "Slider.thumbHeight", 14);
// handle scaling for sizeVarients for special case components. The
// key "JComponent.sizeVariant" scales for large/small/mini
// components are based on Apples LAF
String scaleKey = (String)slider.getClientProperty(
"JComponent.sizeVariant");
if (scaleKey != null){
if ("large".equals(scaleKey)){
thumbWidth *= 1.15;
thumbHeight *= 1.15;
} else if ("small".equals(scaleKey)){
thumbWidth *= 0.857;
thumbHeight *= 0.857;
} else if ("mini".equals(scaleKey)){
thumbWidth *= 0.784;
thumbHeight *= 0.784;
}
}
trackBorder =
style.getInt(context, "Slider.trackBorder", 1);
trackHeight = thumbHeight + trackBorder * 2;
paintValue = style.getBoolean(context,
"Slider.paintValue", true);
if (oldStyle != null) {
uninstallKeyboardActions(c);
installKeyboardActions(c);
}
}
context.dispose();
context = getContext(c, Region.SLIDER_TRACK, ENABLED);
sliderTrackStyle =
SynthLookAndFeel.updateStyle(context, this);
context.dispose();
context = getContext(c, Region.SLIDER_THUMB, ENABLED);
sliderThumbStyle =
SynthLookAndFeel.updateStyle(context, this);
context.dispose();
}
/**
* {@inheritDoc}
*/
@Override
protected TrackListener createTrackListener(JSlider s) {
return new SynthTrackListener();
}
private void updateThumbState(int x, int y) {
setThumbActive(thumbRect.contains(x, y));
}
private void updateThumbState(int x, int y, boolean pressed) {
updateThumbState(x, y);
setThumbPressed(pressed);
}
private void setThumbActive(boolean active) {
if (thumbActive != active) {
thumbActive = active;
slider.repaint(thumbRect);
}
}
private void setThumbPressed(boolean pressed) {
if (thumbPressed != pressed) {
thumbPressed = pressed;
slider.repaint(thumbRect);
}
}
/**
* {@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");
}
if (slider.getPaintLabels() && labelsHaveSameBaselines()) {
// Get the insets for the track.
Insets trackInsets = new Insets(0, 0, 0, 0);
SynthContext trackContext = getContext(slider,
Region.SLIDER_TRACK);
style.getInsets(trackContext, trackInsets);
trackContext.dispose();
if (slider.getOrientation() == JSlider.HORIZONTAL) {
int valueHeight = 0;
if (paintValue) {
SynthContext context = getContext(slider);
valueHeight = context.getStyle().getGraphicsUtils(context).
getMaximumCharHeight(context);
context.dispose();
}
int tickHeight = 0;
if (slider.getPaintTicks()) {
tickHeight = getTickLength();
}
int labelHeight = getHeightOfTallestLabel();
int contentHeight = valueHeight + trackHeight +
trackInsets.top + trackInsets.bottom +
tickHeight + labelHeight + 4;
int centerY = height / 2 - contentHeight / 2;
centerY += valueHeight + 2;
centerY += trackHeight + trackInsets.top + trackInsets.bottom;
centerY += tickHeight + 2;
JComponent label = (JComponent) slider.getLabelTable().elements().nextElement();
Dimension pref = label.getPreferredSize();
return centerY + label.getBaseline(pref.width, pref.height);
}
else { // VERTICAL
Integer value = slider.getInverted() ? getLowestValue() :
getHighestValue();
if (value != null) {
int valueY = insetCache.top;
int valueHeight = 0;
if (paintValue) {
SynthContext context = getContext(slider);
valueHeight = context.getStyle().getGraphicsUtils(
context).getMaximumCharHeight(context);
context.dispose();
}
int contentHeight = height - insetCache.top -
insetCache.bottom;
int trackY = valueY + valueHeight;
int trackHeight = contentHeight - valueHeight;
int yPosition = yPositionForValue(value.intValue(), trackY,
trackHeight);
JComponent label = (JComponent) slider.getLabelTable().get(value);
Dimension pref = label.getPreferredSize();
return yPosition - pref.height / 2 +
label.getBaseline(pref.width, pref.height);
}
}
}
return -1;
}
/**
* {@inheritDoc}
*/
@Override
public Dimension getPreferredSize(JComponent c) {
recalculateIfInsetsChanged();
Dimension d = new Dimension(contentRect.width, contentRect.height);
if (slider.getOrientation() == JSlider.VERTICAL) {
d.height = 200;
} else {
d.width = 200;
}
Insets i = slider.getInsets();
d.width += i.left + i.right;
d.height += i.top + i.bottom;
return d;
}
/**
* {@inheritDoc}
*/
@Override
public Dimension getMinimumSize(JComponent c) {
recalculateIfInsetsChanged();
Dimension d = new Dimension(contentRect.width, contentRect.height);
if (slider.getOrientation() == JSlider.VERTICAL) {
d.height = thumbRect.height + insetCache.top + insetCache.bottom;
} else {
d.width = thumbRect.width + insetCache.left + insetCache.right;
}
return d;
}
/**
* {@inheritDoc}
*/
@Override
protected void calculateGeometry() {
calculateThumbSize();
layout();
calculateThumbLocation();
}
/**
* Lays out the slider.
*/
protected void layout() {
SynthContext context = getContext(slider);
SynthGraphicsUtils synthGraphics = style.getGraphicsUtils(context);
// Get the insets for the track.
Insets trackInsets = new Insets(0, 0, 0, 0);
SynthContext trackContext = getContext(slider, Region.SLIDER_TRACK);
style.getInsets(trackContext, trackInsets);
trackContext.dispose();
if (slider.getOrientation() == JSlider.HORIZONTAL) {
// Calculate the height of all the subcomponents so we can center
// them.
valueRect.height = 0;
if (paintValue) {
valueRect.height =
synthGraphics.getMaximumCharHeight(context);
}
trackRect.height = trackHeight;
tickRect.height = 0;
if (slider.getPaintTicks()) {
tickRect.height = getTickLength();
}
labelRect.height = 0;
if (slider.getPaintLabels()) {
labelRect.height = getHeightOfTallestLabel();
}
contentRect.height = valueRect.height + trackRect.height
+ trackInsets.top + trackInsets.bottom
+ tickRect.height + labelRect.height + 4;
contentRect.width = slider.getWidth() - insetCache.left
- insetCache.right;
// Check if any of the labels will paint out of bounds.
int pad = 0;
if (slider.getPaintLabels()) {
// Calculate the track rectangle. It is necessary for
// xPositionForValue to return correct values.
trackRect.x = insetCache.left;
trackRect.width = contentRect.width;
Dictionary dictionary = slider.getLabelTable();
if (dictionary != null) {
int minValue = slider.getMinimum();
int maxValue = slider.getMaximum();
// Iterate through the keys in the dictionary and find the
// first and last labels indices that fall within the
// slider range.
int firstLblIdx = Integer.MAX_VALUE;
int lastLblIdx = Integer.MIN_VALUE;
for (Enumeration keys = dictionary.keys();
keys.hasMoreElements(); ) {
int keyInt = ((Integer)keys.nextElement()).intValue();
if (keyInt >= minValue && keyInt < firstLblIdx) {
firstLblIdx = keyInt;
}
if (keyInt <= maxValue && keyInt > lastLblIdx) {
lastLblIdx = keyInt;
}
}
// Calculate the pad necessary for the labels at the first
// and last visible indices.
pad = getPadForLabel(firstLblIdx);
pad = Math.max(pad, getPadForLabel(lastLblIdx));
}
}
// Calculate the painting rectangles for each of the different
// slider areas.
valueRect.x = trackRect.x = tickRect.x = labelRect.x =
(insetCache.left + pad);
valueRect.width = trackRect.width = tickRect.width =
labelRect.width = (contentRect.width - (pad * 2));
int centerY = slider.getHeight() / 2 - contentRect.height / 2;
valueRect.y = centerY;
centerY += valueRect.height + 2;
trackRect.y = centerY + trackInsets.top;
centerY += trackRect.height + trackInsets.top + trackInsets.bottom;
tickRect.y = centerY;
centerY += tickRect.height + 2;
labelRect.y = centerY;
centerY += labelRect.height;
} else {
// Calculate the width of all the subcomponents so we can center
// them.
trackRect.width = trackHeight;
tickRect.width = 0;
if (slider.getPaintTicks()) {
tickRect.width = getTickLength();
}
labelRect.width = 0;
if (slider.getPaintLabels()) {
labelRect.width = getWidthOfWidestLabel();
}
valueRect.y = insetCache.top;
valueRect.height = 0;
if (paintValue) {
valueRect.height =
synthGraphics.getMaximumCharHeight(context);
}
// Get the max width of the min or max value of the slider.
FontMetrics fm = slider.getFontMetrics(slider.getFont());
valueRect.width = Math.max(
synthGraphics.computeStringWidth(context, slider.getFont(),
fm, "" + slider.getMaximum()),
synthGraphics.computeStringWidth(context, slider.getFont(),
fm, "" + slider.getMinimum()));
int l = valueRect.width / 2;
int w1 = trackInsets.left + trackRect.width / 2;
int w2 = trackRect.width / 2 + trackInsets.right +
tickRect.width + labelRect.width;
contentRect.width = Math.max(w1, l) + Math.max(w2, l) +
2 + insetCache.left + insetCache.right;
contentRect.height = slider.getHeight() -
insetCache.top - insetCache.bottom;
// Layout the components.
trackRect.y = tickRect.y = labelRect.y =
valueRect.y + valueRect.height;
trackRect.height = tickRect.height = labelRect.height =
contentRect.height - valueRect.height;
int startX = slider.getWidth() / 2 - contentRect.width / 2;
if (SynthLookAndFeel.isLeftToRight(slider)) {
if (l > w1) {
startX += (l - w1);
}
trackRect.x = startX + trackInsets.left;
startX += trackInsets.left + trackRect.width + trackInsets.right;
tickRect.x = startX;
labelRect.x = startX + tickRect.width + 2;
} else {
if (l > w2) {
startX += (l - w2);
}
labelRect.x = startX;
startX += labelRect.width + 2;
tickRect.x = startX;
trackRect.x = startX + tickRect.width + trackInsets.left;
}
}
context.dispose();
lastSize = slider.getSize();
}
/**
* Calculates the pad for the label at the specified index.
*
* @param i index of the label to calculate pad for.
* @return padding required to keep label visible.
*/
private int getPadForLabel(int i) {
int pad = 0;
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) {
pad = Math.max(pad, insetCache.left - (centerX - cHalfWidth));
}
if (centerX + cHalfWidth > slider.getWidth() - insetCache.right) {
pad = Math.max(pad, (centerX + cHalfWidth) -
(slider.getWidth() - insetCache.right));
}
}
return pad;
}
/**
* {@inheritDoc}
*/
@Override
protected void calculateThumbLocation() {
super.calculateThumbLocation();
if (slider.getOrientation() == JSlider.HORIZONTAL) {
thumbRect.y += trackBorder;
} else {
thumbRect.x += trackBorder;
}
Point mousePosition = slider.getMousePosition();
if(mousePosition != null) {
updateThumbState(mousePosition.x, mousePosition.y);
}
}
/**
* {@inheritDoc}
*/
@Override
public void setThumbLocation(int x, int y) {
super.setThumbLocation(x, y);
// Value rect is tied to the thumb location. We need to repaint when
// the thumb repaints.
slider.repaint(valueRect.x, valueRect.y,
valueRect.width, valueRect.height);
setThumbActive(false);
}
/**
* {@inheritDoc}
*/
@Override
protected int xPositionForValue(int value) {
int min = slider.getMinimum();
int max = slider.getMaximum();
int trackLeft = trackRect.x + thumbRect.width / 2 + trackBorder;
int trackRight = trackRect.x + trackRect.width - thumbRect.width / 2
- trackBorder;
int trackLength = trackRight - trackLeft;
double valueRange = (double)max - (double)min;
double pixelsPerValue = (double)trackLength / valueRange;
int xPosition;
if (!drawInverted()) {
xPosition = trackLeft;
xPosition += Math.round( pixelsPerValue * ((double)value - min));
} else {
xPosition = trackRight;
xPosition -= Math.round( pixelsPerValue * ((double)value - min));
}
xPosition = Math.max(trackLeft, xPosition);
xPosition = Math.min(trackRight, xPosition);
return xPosition;
}
/**
* {@inheritDoc}
*/
@Override
protected int yPositionForValue(int value, int trackY, int trackHeight) {
int min = slider.getMinimum();
int max = slider.getMaximum();
int trackTop = trackY + thumbRect.height / 2 + trackBorder;
int trackBottom = trackY + trackHeight - thumbRect.height / 2 -
trackBorder;
int trackLength = trackBottom - trackTop;
double valueRange = (double)max - (double)min;
double pixelsPerValue = (double)trackLength / valueRange;
int yPosition;
if (!drawInverted()) {
yPosition = trackTop;
yPosition += Math.round(pixelsPerValue * ((double)max - value));
} else {
yPosition = trackTop;
yPosition += Math.round(pixelsPerValue * ((double)value - min));
}
yPosition = Math.max(trackTop, yPosition);
yPosition = Math.min(trackBottom, yPosition);
return yPosition;
}
/**
* {@inheritDoc}
*/
@Override
public int valueForYPosition(int yPos) {
int value;
int minValue = slider.getMinimum();
int maxValue = slider.getMaximum();
int trackTop = trackRect.y + thumbRect.height / 2 + trackBorder;
int trackBottom = trackRect.y + trackRect.height
- thumbRect.height / 2 - trackBorder;
int trackLength = trackBottom - trackTop;
if (yPos <= trackTop) {
value = drawInverted() ? minValue : maxValue;
} else if (yPos >= trackBottom) {
value = drawInverted() ? maxValue : minValue;
} else {
int distanceFromTrackTop = yPos - trackTop;
double valueRange = (double)maxValue - (double)minValue;
double valuePerPixel = valueRange / (double)trackLength;
int valueFromTrackTop =
(int)Math.round(distanceFromTrackTop * valuePerPixel);
value = drawInverted() ?
minValue + valueFromTrackTop : maxValue - valueFromTrackTop;
}
return value;
}
/**
* {@inheritDoc}
*/
@Override
public int valueForXPosition(int xPos) {
int value;
int minValue = slider.getMinimum();
int maxValue = slider.getMaximum();
int trackLeft = trackRect.x + thumbRect.width / 2 + trackBorder;
int trackRight = trackRect.x + trackRect.width
- thumbRect.width / 2 - trackBorder;
int trackLength = trackRight - trackLeft;
if (xPos <= trackLeft) {
value = drawInverted() ? maxValue : minValue;
} else if (xPos >= trackRight) {
value = drawInverted() ? minValue : maxValue;
} else {
int distanceFromTrackLeft = xPos - trackLeft;
double valueRange = (double)maxValue - (double)minValue;
double valuePerPixel = valueRange / (double)trackLength;
int valueFromTrackLeft =
(int)Math.round(distanceFromTrackLeft * valuePerPixel);
value = drawInverted() ?
maxValue - valueFromTrackLeft : minValue + valueFromTrackLeft;
}
return value;
}
/**
* {@inheritDoc}
*/
@Override
protected Dimension getThumbSize() {
Dimension size = new Dimension();
if (slider.getOrientation() == JSlider.VERTICAL) {
size.width = thumbHeight;
size.height = thumbWidth;
} else {
size.width = thumbWidth;
size.height = thumbHeight;
}
return size;
}
/**
* {@inheritDoc}
*/
@Override
protected void recalculateIfInsetsChanged() {
SynthContext context = getContext(slider);
Insets newInsets = style.getInsets(context, null);
Insets compInsets = slider.getInsets();
newInsets.left += compInsets.left; newInsets.right += compInsets.right;
newInsets.top += compInsets.top; newInsets.bottom += compInsets.bottom;
if (!newInsets.equals(insetCache)) {
insetCache = newInsets;
calculateGeometry();
}
context.dispose();
}
/**
* {@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) {
return getContext(c, subregion, getComponentState(c, subregion));
}
private SynthContext getContext(JComponent c, Region subregion, int state) {
SynthStyle style = null;
Class klass = SynthContext.class;
if (subregion == Region.SLIDER_TRACK) {
style = sliderTrackStyle;
} else if (subregion == Region.SLIDER_THUMB) {
style = sliderThumbStyle;
}
return SynthContext.getContext(klass, c, subregion, style, state);
}
private int getComponentState(JComponent c, Region region) {
if (region == Region.SLIDER_THUMB && thumbActive &&c.isEnabled()) {
int state = thumbPressed ? PRESSED : MOUSE_OVER;
if (c.isFocusOwner()) state |= FOCUSED;
return state;
}
return SynthLookAndFeel.getComponentState(c);
}
/**
* 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().paintSliderBackground(context,
g, 0, 0, c.getWidth(), c.getHeight(),
slider.getOrientation());
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) {
recalculateIfInsetsChanged();
recalculateIfOrientationChanged();
Rectangle clip = g.getClipBounds();
if (lastSize == null || !lastSize.equals(slider.getSize())) {
calculateGeometry();
}
if (paintValue) {
FontMetrics fm = SwingUtilities2.getFontMetrics(slider, g);
int labelWidth = context.getStyle().getGraphicsUtils(context).
computeStringWidth(context, g.getFont(), fm,
"" + slider.getValue());
valueRect.x = thumbRect.x + (thumbRect.width - labelWidth) / 2;
// For horizontal sliders, make sure value is not painted
// outside slider bounds.
if (slider.getOrientation() == JSlider.HORIZONTAL) {
if (valueRect.x + labelWidth > insetCache.left + contentRect.width) {
valueRect.x = (insetCache.left + contentRect.width) - labelWidth;
}
valueRect.x = Math.max(valueRect.x, 0);
}
g.setColor(context.getStyle().getColor(
context, ColorType.TEXT_FOREGROUND));
context.getStyle().getGraphicsUtils(context).paintText(
context, g, "" + slider.getValue(), valueRect.x,
valueRect.y, -1);
}
if (slider.getPaintTrack() && clip.intersects(trackRect)) {
SynthContext subcontext = getContext(slider, Region.SLIDER_TRACK);
paintTrack(subcontext, g, trackRect);
subcontext.dispose();
}
if (clip.intersects(thumbRect)) {
SynthContext subcontext = getContext(slider, Region.SLIDER_THUMB);
paintThumb(subcontext, g, thumbRect);
subcontext.dispose();
}
if (slider.getPaintTicks() && clip.intersects(tickRect)) {
paintTicks(g);
}
if (slider.getPaintLabels() && clip.intersects(labelRect)) {
paintLabels(g);
}
}
/**
* {@inheritDoc}
*/
@Override
public void paintBorder(SynthContext context, Graphics g, int x,
int y, int w, int h) {
context.getPainter().paintSliderBorder(context, g, x, y, w, h,
slider.getOrientation());
}
/**
* Paints the slider thumb.
*
* @param context context for the component being painted
* @param g {@code Graphics} object used for painting
* @param thumbBounds bounding box for the thumb
*/
protected void paintThumb(SynthContext context, Graphics g,
Rectangle thumbBounds) {
int orientation = slider.getOrientation();
SynthLookAndFeel.updateSubregion(context, g, thumbBounds);
context.getPainter().paintSliderThumbBackground(context, g,
thumbBounds.x, thumbBounds.y, thumbBounds.width,
thumbBounds.height, orientation);
context.getPainter().paintSliderThumbBorder(context, g,
thumbBounds.x, thumbBounds.y, thumbBounds.width,
thumbBounds.height, orientation);
}
/**
* Paints the slider track.
*
* @param context context for the component being painted
* @param g {@code Graphics} object used for painting
* @param trackBounds bounding box for the track
*/
protected void paintTrack(SynthContext context, Graphics g,
Rectangle trackBounds) {
int orientation = slider.getOrientation();
SynthLookAndFeel.updateSubregion(context, g, trackBounds);
context.getPainter().paintSliderTrackBackground(context, g,
trackBounds.x, trackBounds.y, trackBounds.width,
trackBounds.height, orientation);
context.getPainter().paintSliderTrackBorder(context, g,
trackBounds.x, trackBounds.y, trackBounds.width,
trackBounds.height, orientation);
}
/**
* {@inheritDoc}
*/
@Override
public void propertyChange(PropertyChangeEvent e) {
if (SynthLookAndFeel.shouldUpdateStyle(e)) {
updateStyle((JSlider)e.getSource());
}
}
//////////////////////////////////////////////////
/// Track Listener Class
//////////////////////////////////////////////////
/**
* Track mouse movements.
*/
private class SynthTrackListener extends TrackListener {
@Override public void mouseExited(MouseEvent e) {
setThumbActive(false);
}
@Override public void mousePressed(MouseEvent e) {
super.mousePressed(e);
setThumbPressed(thumbRect.contains(e.getX(), e.getY()));
}
@Override public void mouseReleased(MouseEvent e) {
super.mouseReleased(e);
updateThumbState(e.getX(), e.getY(), false);
}
@Override public void mouseDragged(MouseEvent e) {
int thumbMiddle;
if (!slider.isEnabled()) {
return;
}
currentMouseX = e.getX();
currentMouseY = e.getY();
if (!isDragging()) {
return;
}
slider.setValueIsAdjusting(true);
switch (slider.getOrientation()) {
case JSlider.VERTICAL:
int halfThumbHeight = thumbRect.height / 2;
int thumbTop = e.getY() - offset;
int trackTop = trackRect.y;
int trackBottom = trackRect.y + trackRect.height
- halfThumbHeight - trackBorder;
int vMax = yPositionForValue(slider.getMaximum() -
slider.getExtent());
if (drawInverted()) {
trackBottom = vMax;
trackTop = trackTop + halfThumbHeight;
} else {
trackTop = vMax;
}
thumbTop = Math.max(thumbTop, trackTop - halfThumbHeight);
thumbTop = Math.min(thumbTop, trackBottom - halfThumbHeight);
setThumbLocation(thumbRect.x, thumbTop);
thumbMiddle = thumbTop + halfThumbHeight;
slider.setValue(valueForYPosition(thumbMiddle));
break;
case JSlider.HORIZONTAL:
int halfThumbWidth = thumbRect.width / 2;
int thumbLeft = e.getX() - offset;
int trackLeft = trackRect.x + halfThumbWidth + trackBorder;
int trackRight = trackRect.x + trackRect.width
- halfThumbWidth - trackBorder;
int hMax = xPositionForValue(slider.getMaximum() -
slider.getExtent());
if (drawInverted()) {
trackLeft = hMax;
} else {
trackRight = hMax;
}
thumbLeft = Math.max(thumbLeft, trackLeft - halfThumbWidth);
thumbLeft = Math.min(thumbLeft, trackRight - halfThumbWidth);
setThumbLocation(thumbLeft, thumbRect.y);
thumbMiddle = thumbLeft + halfThumbWidth;
slider.setValue(valueForXPosition(thumbMiddle));
break;
default:
return;
}
if (slider.getValueIsAdjusting()) {
setThumbActive(true);
}
}
@Override public void mouseMoved(MouseEvent e) {
updateThumbState(e.getX(), e.getY());
}
}
}
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