public void actionPerformed(ActionEvent event) {
Object source = event.getSource();
if (boundedRangeModel != null) {
int value = boundedRangeModel.getValue();
if (source == forwardButton) {
boundedRangeModel.setValue(
value == boundedRangeModel.getMaximum() ? boundedRangeModel.getMinimum() : value + 1);
} else if (source == rewindButton) {
boundedRangeModel.setValue(
value == boundedRangeModel.getMinimum() ? boundedRangeModel.getMaximum() : value - 1);
} else if (source == startButton) {
if (startButton.isSelected() != player.isActive()) {
if (startButton.isSelected()) {
player.start();
} else {
player.stop();
}
}
} else if (source == audioButton) {
player.setAudioEnabled(audioButton.isSelected());
} else if (source == colorCyclingButton) {
if (player instanceof ColorCyclePlayer) {
((ColorCyclePlayer) player).setColorCyclingStarted(colorCyclingButton.isSelected());
}
}
}
}
/**
* This determines the amount of the progress bar that should be filled based on the percent done
* gathered from the model. This is a common operation so it was abstracted out. It assumes that
* your progress bar is linear. That is, if you are making a circular progress indicator, you will
* want to override this method.
*/
protected int getAmountFull(Insets b, int width, int height) {
int amountFull = 0;
BoundedRangeModel model = progressBar.getModel();
if ((model.getMaximum() - model.getMinimum()) != 0) {
if (progressBar.getOrientation() == JProgressBar.HORIZONTAL) {
amountFull = (int) Math.round(width * progressBar.getPercentComplete());
} else {
amountFull = (int) Math.round(height * progressBar.getPercentComplete());
}
}
return amountFull;
}
// ChangeListener
public void stateChanged(ChangeEvent e) {
BoundedRangeModel model = progressBar.getModel();
int newRange = model.getMaximum() - model.getMinimum();
int newPercent;
int oldPercent = getCachedPercent();
if (newRange > 0) {
newPercent = (int) ((100 * (long) model.getValue()) / newRange);
} else {
newPercent = 0;
}
if (newPercent != oldPercent) {
setCachedPercent(newPercent);
progressBar.repaint();
}
}
/**
* Adjusts the allocation given to the view to be a suitable allocation for a text field. If the
* view has been allocated more than the preferred span vertically, the allocation is changed to
* be centered vertically. Horizontally the view is adjusted according to the horizontal alignment
* property set on the associated JTextField (if that is the type of the hosting component).
*
* @param a the allocation given to the view, which may need to be adjusted.
* @return the allocation that the superclass should use.
*/
protected Shape adjustAllocation(Shape a) {
if (a != null) {
Rectangle bounds = a.getBounds();
int vspan = (int) getPreferredSpan(Y_AXIS);
int hspan = (int) getPreferredSpan(X_AXIS);
if (bounds.height != vspan) {
int slop = bounds.height - vspan;
bounds.y += slop / 2;
bounds.height -= slop;
}
// horizontal adjustments
Component c = getContainer();
if (c instanceof JTextField) {
JTextField field = (JTextField) c;
BoundedRangeModel vis = field.getHorizontalVisibility();
int max = Math.max(hspan, bounds.width);
int value = vis.getValue();
int extent = Math.min(max, bounds.width - 1);
if ((value + extent) > max) {
value = max - extent;
}
vis.setRangeProperties(value, extent, vis.getMinimum(), max, false);
if (hspan < bounds.width) {
// horizontally align the interior
int slop = bounds.width - 1 - hspan;
int align = ((JTextField) c).getHorizontalAlignment();
if (Utilities.isLeftToRight(c)) {
if (align == LEADING) {
align = LEFT;
} else if (align == TRAILING) {
align = RIGHT;
}
} else {
if (align == LEADING) {
align = RIGHT;
} else if (align == TRAILING) {
align = LEFT;
}
}
switch (align) {
case SwingConstants.CENTER:
bounds.x += slop / 2;
bounds.width -= slop;
break;
case SwingConstants.RIGHT:
bounds.x += slop;
bounds.width -= slop;
break;
}
} else {
// adjust the allocation to match the bounded range.
bounds.width = hspan;
bounds.x -= vis.getValue();
}
}
return bounds;
}
return null;
}
/**
* Returns the minimum value for the <code>JProgressBar</code>. This defines the lower bound for
* the current value, and is stored in the component's <code>model</code>.
*
* @return The minimum value.
* @see #setMinimum(int)
*/
public int getMinimum() {
return model.getMinimum();
}
/**
* Returns the current value expressed as a percentage. This is calculated as <code>
* (value - min) / (max - min)</code>.
*
* @return The percentage (a value in the range 0.0 to 1.0).
*/
public double getPercentComplete() {
if (getMaximum() == getMinimum()) return 1.0;
else
return (double) (model.getValue() - model.getMinimum())
/ (model.getMaximum() - model.getMinimum());
}