vcl-dxchartcore-dot-tdxchartmousewheelaction.md
Specifies modifier keys required to execute the mouse action in addition to mouse wheel rotation.
property ModifierKeys: TdxModifierKeys read; write;
| Type | Description |
|---|---|
| TdxModifierKeys |
The set of modifier keys required to execute the mouse action in addition to mouse wheel rotation.
|
Use the ModifierKeys property to define what modifier keys a user needs to hold down while rotating the mouse wheel. This property is particularly useful when you need to differentiate similar mouse actions (zoom and scroll operations, for example).
The ModifierKeys property accepts a set of the following flags in any combination:
| Flag | Description |
|---|---|
| TdxModifierKey.Alt | Users need to rotate the mouse wheel while holding down the Alt modifier key to execute the mouse action. |
| TdxModifierKey.Ctrl | Users need to rotate the mouse wheel while holding down the Ctrl modifier key to execute the mouse action. |
| TdxModifierKey.Shift | Users need to rotate the mouse wheel while holding down the Shift modifier key to execute the mouse action. |
Note
TdxModifierKey is a scoped enumeration type. Use the type name together with a scope resolution token (. in Delphi or :: in C++Builder) followed by an enumeration value to refer to this value. For example, use TdxModifierKey.Ctrl (in Delphi) or TdxModifierKey::Ctrl (in C++Builder) to refer to the Ctrl value in code.
The ModifierKeys property’s default value depends on the mouse wheel action type:
ScrollThe default value is [] (no modifier key is required).ZoomThe default value is [TdxModifierKey.Ctrl] (only the Ctrl modifier key is required).
See Also
TdxChartMouseWheelAction.Enabled Property
TdxChartMouseAction.ModifierKeys Property
TdxChartMouseWheelAction Class