/** if a button is pressed ... */
public void actionPerformed(ActionEvent evt) {
try {
String acmd = evt.getActionCommand();
if (acmd.equals(ACTION_CMD_PRINT)) {
this.chartPanel.createChartPrintJob();
} else if (acmd.equals(ACTION_CMD_SAVE_AS)) {
this.chartPanel.doSaveAs();
} else if (acmd.equals(ACTION_CMD_ZOOM_IN)) {
ChartRenderingInfo info = chartPanel.getChartRenderingInfo();
Rectangle2D rect = info.getChartArea();
chartPanel.setZoomInFactor(ZOOM_FACTOR);
chartPanel.zoomInDomain(rect.getCenterX(), rect.getCenterY());
} else if (acmd.equals(ACTION_CMD_ZOOM_OUT)) {
ChartRenderingInfo info = chartPanel.getChartRenderingInfo();
Rectangle2D rect = info.getChartArea();
chartPanel.setZoomOutFactor(1 / ZOOM_FACTOR);
chartPanel.zoomOutDomain(rect.getCenterX(), rect.getCenterY());
} else if (acmd.equals(ACTION_CMD_ZOOM_TO_FIT)) {
// X-axis (has no fixed borders)
chartPanel.restoreAutoBounds();
}
} catch (Exception e) {
e.printStackTrace();
}
}
