Unit
MaskEnh

Declaration
TMaskEnh = class(TObject)

Description
TMaskEnh class can be considered the "mask processor", into which you set the required mask attributes and extract the resulting values. This class is used by TCustomEditEnh and derived controls. The mask processor is able to manipulate "standard" masks (like those defined for the VCL TMaskEdit control) as well mask strings which use extended character definitions for "enhanced" mask processing. NOTE: The processing of VCL standard masks is NOT 100% compatible, particularly when the "!" control character is used. You should test such mask prior to implementation. Note: The StringList property MaskList is defined so that all instances of TMaskEnh which do not actually use a specifically defined MaskList, all use the same instance of an empty string list. So there should be no overhead other than the pointer/reference to this common list.

Introduced Public Properties

AssigningText	Property set to true when text is being assigned directly - rather than the char-by-char input that occurs during user-entry.
IsEmpty	Call this to see if any input has been made to the mask.
Mask	Get/Set the Mask definiton string.
MaskEx	Refer to TCustomEditEnh.SetEditMaskEx for details.
MaskLen	The number of character positions represented by the mask.
MaskList	Get/Set a list of masks which will be dynamically selected according to how they match the current input value.
Mode	Get/Set the current mode of the mask processor.
Position	ReadOnly property representing the current processor position in the mask.
Text	Get/Set the current text value.
ValidateOnSetText	Determines whether the processor should validate the input when set directly use the Text property or SetMaskedText function.

Introduced Public Methods

AdjustMaskPos	Attempts to calculate the correct mask position for the next input character.
Clear	Clears the masks storage of input text.
Create
DeleteBackSpace	Called to delete the previous input character.
DeleteForward	Called to delete the next input character.
DeleteRange	Called to delete Len characters from the current position.
Destroy
GetDisplayPosition	Calculates what character position in the actually displayed text corresponds to the current mask position.
GetIsLeftJust	Calculates if the given position should be left-justified.
GetIsRightJust	Calculates if the given position should be right-justified.
GetMaskedText	Returns a copy of the input text passed through the mask processing.
InitMaskInput	Prepares the mask processor for new input.
InsertMaskChar	Insert a character at the current position.
MovePosition	Called with appropriate Key board style parameters (VK_DOWN etc) this function will cause the process to move its current position appropriately.
MoveToPosition	Attempts to move the current mask position directly to the position specified.
ReplaceMaskChar	Replace the character after the current position.
RestoreMaskTextFrom	Used to restore the internal representation of the input string.
SaveMaskTextTo	Used to save the internal representation of the input string for restoration later if required.
SetMaskedText	Directly set the entire input string.
SetNumericSign	Used in eemNumeric mode to directly set the sign of the value being represented.
ValidateEdit	Called to validate the input against the mask.

Introduced Public Events

OnError

Provide code here to override default error processing.