get the wrong return values

[Jia Huang]

chart.setOnMouseReleased(new EventHandler<MouseEvent>() {
	@Override
	public void handle(final MouseEvent event) {
	final Bounds bb = chartBackground.sceneToLocal(rect.getBoundsInLocal());
	final double minx = bb.getMinX();
	final double maxx = bb.getMaxX();
	final double miny = bb.getMinY();
	final double maxy = bb.getMaxY();
	doZoom(true, chart.getXAxis().getValueForDisplay(minx), chart.getXAxis().getValueForDisplay(maxx));
	doZoom(false, chart.getYAxis().getValueForDisplay(miny), chart.getYAxis().getValueForDisplay(maxy));
	rect.setWidth(0);
	rect.setHeight(0);
	}
});

when I drag and print miny and maxy, I get negative. Why?

[Kerner]

Because you are selecting an area that (partly) is outside of the axis bounds. That's perfectly normal.

[Jia Huang]

Hi,
When I do like that， It disappear

I get

miny = -326.0
maxy =  -108.0
getValueForDisplay(miny)) = 7.065625
getValueForDisplay(maxy) = 4.6812499999999995

However, if I do not put the chart in grid pane, it can work, like that

I get

miny = 102.0
maxy = 290.0
getValueForDisplay(miny) = 2.3843749999999995
getValueForDisplay(maxy) = 0.32812499999999994

[Kerner]

Hi see you are working on a zoomable MassSpectrum View. What about working on that together? Is the project already on GitHub?

[Jia Huang]

I am so sorry. I can' t add you as Collaborators in github because the project is not belong me. @kerner1000

[Kerner]

@lhuangjs OK, but be aware of this project's license. If you use this project in a closed source/ commercial project of your own, you need to mention this usage in your own licence statement.

[Jia Huang]

@kerner1000 ok, I will If I use it.

[Kerner]

Without example code it is hard to tell what is the problem.