private void previewY() {
Viewport tempViewport = new Viewport(recordChart.getMaximumViewport());
float dy = (tempViewport.height() + 0.2f) / 4;
tempViewport.inset(0, dy);
recordPreviewChart.setCurrentViewportWithAnimation(tempViewport);
recordPreviewChart.setZoomType(ZoomType.VERTICAL);
}
private void previewXY() {
// Better to not modify viewport of any recordChart directly so create a copy.
Viewport tempViewport = new Viewport(recordChart.getMaximumViewport());
// Make temp viewport smaller.
float dx = tempViewport.width() / 4;
float dy = tempViewport.height() / 4;
tempViewport.inset(dx, dy);
recordPreviewChart.setCurrentViewportWithAnimation(tempViewport);
}