ChartDirector 6.2 (.NET Edition)

WinChartViewer.ZoomDirection


Declaration

[C#] public WinChartDirection ZoomDirection {get; set;};
[VB] Public Property ZoomDirection As WinChartDirection

Description

Gets or sets the zoom direction for mouse zoom in/out actions.

In zoom operations for charts, it is common to restrict zooming to one direction only. For example, in a chart plotting temperature against time, zooming in from a yearly chart to a daily chart may mean the time axis (x-axis) is zoomed in by 36500%, while the temperature axis (y-axis) may be auto-scaled and not zoomed in at all. The user may be surprise if you also zoom in the y-axis by 36500%, in which case the chart may become hardly readable.

This method allows you to determine the zoom direction for mouse zoom actions (see WinChartViewer.MouseUsage), specified using the following predefined constants:

ConstantValueDescription
WinChartDirection.Horizontal0Zoom actions apply to horizontal direction only.
WinChartDirection.Vertical1Zoom actions apply to vertical direction only.
WinChartDirection.HorizontalVertical2Zoom actions apply to both horizontal and vertical directions.