/** * 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(); } }