/** Updates the dimensions for both thumbs. */
@Override
protected void calculateThumbSize() {
// Call superclass method for lower thumb size.
super.calculateThumbSize();
// Set upper thumb size.
upperThumbRect.setSize(thumbRect.width, thumbRect.height);
}
/** Paints the track. */
@Override
public void paintTrack(Graphics g) {
// Draw track.
super.paintTrack(g);
Rectangle trackBounds = trackRect;
if (slider.getOrientation() == JSlider.HORIZONTAL) {
// Determine position of selected range by moving from the middle
// of one thumb to the other.
int lowerX = thumbRect.x + (thumbRect.width / 2);
int upperX = upperThumbRect.x + (upperThumbRect.width / 2);
// Determine track position.
int cy = (trackBounds.height / 2) - 2;
// Save color and shift position.
Color oldColor = g.getColor();
g.translate(trackBounds.x, trackBounds.y + cy);
// Draw selected range.
g.setColor(rangeColor);
for (int y = 0; y <= 3; y++) {
g.drawLine(lowerX - trackBounds.x, y, upperX - trackBounds.x, y);
}
// Restore position and color.
g.translate(-trackBounds.x, -(trackBounds.y + cy));
g.setColor(oldColor);
} else {
// Determine position of selected range by moving from the middle
// of one thumb to the other.
int lowerY = thumbRect.x + (thumbRect.width / 2);
int upperY = upperThumbRect.x + (upperThumbRect.width / 2);
// Determine track position.
int cx = (trackBounds.width / 2) - 2;
// Save color and shift position.
Color oldColor = g.getColor();
g.translate(trackBounds.x + cx, trackBounds.y);
// Draw selected range.
g.setColor(rangeColor);
for (int x = 0; x <= 3; x++) {
g.drawLine(x, lowerY - trackBounds.y, x, upperY - trackBounds.y);
}
// Restore position and color.
g.translate(-(trackBounds.x + cx), -trackBounds.y);
g.setColor(oldColor);
}
}
/**
* Extends the {@link #calculateTrackBuffer()} to allow the extra space required to display the
* arrows on the track.
*
* @see BasicSliderUI#calculateTrackBuffer()
*/
protected void calculateTrackBuffer() {
super.calculateTrackBuffer();
if (showArrows)
if (slider.getOrientation() == JSlider.HORIZONTAL) {
if (arrowWidth > minArrowWidth) trackBuffer += arrowWidth + ARROW_SPACE;
else trackBuffer += minArrowWidth + ARROW_SPACE;
} else {
if (arrowHeight > minArrowHeight) trackBuffer += arrowHeight + ARROW_SPACE;
else trackBuffer += minArrowHeight + ARROW_SPACE;
}
if (showEndLabel)
if (slider.getOrientation() == JSlider.HORIZONTAL) trackBuffer += labelWidth + TEXT_SPACE;
else trackBuffer += labelHeight + TEXT_SPACE;
}
/** Updates the locations for both thumbs. */
@Override
protected void calculateThumbLocation() {
// Call superclass method for lower thumb location.
super.calculateThumbLocation();
// Adjust upper value to snap to ticks if necessary.
if (slider.getSnapToTicks()) {
int upperValue = slider.getValue() + slider.getExtent();
int snappedValue = upperValue;
int majorTickSpacing = slider.getMajorTickSpacing();
int minorTickSpacing = slider.getMinorTickSpacing();
int tickSpacing = 0;
if (minorTickSpacing > 0) {
tickSpacing = minorTickSpacing;
} else if (majorTickSpacing > 0) {
tickSpacing = majorTickSpacing;
}
if (tickSpacing != 0) {
// If it's not on a tick, change the value
if ((upperValue - slider.getMinimum()) % tickSpacing != 0) {
float temp = (float) (upperValue - slider.getMinimum()) / (float) tickSpacing;
int whichTick = Math.round(temp);
snappedValue = slider.getMinimum() + (whichTick * tickSpacing);
}
if (snappedValue != upperValue) {
slider.setExtent(snappedValue - slider.getValue());
}
}
}
// Calculate upper thumb location. The thumb is centered over its
// value on the track.
if (slider.getOrientation() == JSlider.HORIZONTAL) {
int upperPosition = xPositionForValue(slider.getValue() + slider.getExtent());
upperThumbRect.x = upperPosition - (upperThumbRect.width / 2);
upperThumbRect.y = trackRect.y;
} else {
int upperPosition = yPositionForValue(slider.getValue() + slider.getExtent());
upperThumbRect.x = trackRect.x;
upperThumbRect.y = upperPosition - (upperThumbRect.height / 2);
}
}
/** Paints the slider. The selected thumb is always painted on top of the other thumb. */
@Override
public void paint(Graphics g, JComponent c) {
super.paint(g, c);
Rectangle clipRect = g.getClipBounds();
if (upperThumbSelected) {
// Paint lower thumb first, then upper thumb.
if (clipRect.intersects(thumbRect)) {
paintLowerThumb(g);
}
if (clipRect.intersects(upperThumbRect)) {
paintUpperThumb(g);
}
} else {
// Paint upper thumb first, then lower thumb.
if (clipRect.intersects(upperThumbRect)) {
paintUpperThumb(g);
}
if (clipRect.intersects(thumbRect)) {
paintLowerThumb(g);
}
}
}
protected void scrollDueToClickInTrack(int dir) {
// FIXME: for what might this method be overridden?
super.scrollDueToClickInTrack(dir);
}
/**
* Installs the default for this UI delegate in the supplied component.
*
* @param c the component.
*/
public void installUI(JComponent c) {
super.installUI(c);
Boolean b = (Boolean) c.getClientProperty(SLIDER_FILL);
if (b != null) filledSlider = b.booleanValue();
}
/** Installs this UI delegate on the specified component. */
@Override
public void installUI(JComponent c) {
upperThumbRect = new Rectangle();
super.installUI(c);
}
public void setThumbLocation(int x, int y) {
super.setThumbLocation(x, y);
parentSlider.repaint();
}
/**
* Overridden to calculate the geometry of the slider, this calls the {@link
* BasicSliderUI#calculateGeometry} and to add extra calculations to calculate the <code>ArrowRect
* </code> if showArrows is <code>true</code>.
*
* @see BasicSliderUI#calculateGeometry()
*/
public void calculateGeometry() {
super.calculateGeometry();
if (showArrows) calculateArrowRect();
if (showEndLabel) calculateEndLabelRect();
}