TdxChartScrollOptions.ScrollMouseWheelAction Property

Specifies how users can scroll the plot area of a zoomed-in XY diagram with the mouse wheel.

Declaration

property ScrollMouseWheelAction: TdxChartMouseWheelAction read; write;

Property Value

Type	Description
TdxChartMouseWheelAction	Mouse wheel action settings for scroll operations in a zoomed-in XY diagram.

Remarks

Users can rotate the mouse wheel to scroll a zoomed-in XY diagram along the axis of arguments or the axis of values if scrolling along these axes is enabled for the diagram. If a user does not hold down any modifier keys while rotating the mouse wheel, the target diagram scrolls along the axis of values. The diagram scrolls along the axis of arguments if a user holds down the Shift key while rotating the mouse wheel.

You can use the ScrollMouseWheelAction.ModifierKeys property to additionally require users to hold down Alt, Ctrl, and/or Shift modifier keys in any combination to scroll the plot area vertically.

Note

The Shift keystroke required to scroll the plot area horizontally is predefined and cannot be changed. If you define only the Shift modifier key in the ScrollMouseWheelAction.ModifierKeys property, the ability to use the mouse wheel to scroll the plot area horizontally will be unavailable.

Refer to the TdxChartMouseWheelAction class description for detailed information on all available options.

Action Availability

Users can rotate the mouse wheel to scroll a zoomed-in XY diagram only if the following conditions are met:

• The ScrollMouseWheelAction.Enabled property is set to True.
• The diagram’s ScrollOptions.AxisXScrollingEnabled or ScrollOptions.AxisYScrollingEnabled property is set to True.