linechart how to create single point on line

[lyq027]

i want to create only point on line ,and show a popupwindow on the point side. when i touch the line,a point can show for my touch area. how i get a point as a view to control the popupwindow. please help me.

[lecho]

Hi, if you want to create line with many point values but with only one point visible to the user you can create one line without visible points and second line (the same color) with only one point(visible point).

how i get a point as a view to control the popupwindow.

This is not implemented but you can try to use ChartComputator.computeRawX() and ChartComputator.computerRawY to calculate position of the point in pixels. Thanks to that you will be able to display popup window in the place of the point.

Chart interface has method Chart.getChartComputator() so maybe it will be enough for your needs.

[lyq027]

i can't all understand you tell me that method.could you give me some code or process for how i get a point as a view to control the popupwindow.thks

[Ankur008]

final Viewport v=new Viewport(chart.getMaximumViewport());

            v.top=600;
            v.bottom=0;
            v.left=-5;
            v.right=100;

            chart.setMaximumViewport(v);
            chart.setCurrentViewport(v);

I think this will solve your problem.