TmxDBFilterPanel Control
========================
Allows end users to visually construct complex filter criteria by combining
simple filter conditions for individual items (fields in the linked dataset)
using logical operators.  
The TmxDBFilterPanel automatically processes the specified filter conditions
and generates the value for the Filter property (WHERE clause).
You can use this value to programmatically apply filtering to the linked dataset object.

Hierarhical structure (like TreeView).
Supports localization capabilities (captions for buttons and menus).
OnBuildingFilter event enables you to change each filter condition at runtime.
A dataset to be filtered is specified by the DataSet property.
You can use the DataSet.Fields property to designate particular visible fields 
to be available for constructing filter conditions.

Properties, Methods, Events:

Captions: TCaptions; // sets all captions for buttons and menus
DataSet: TDataSet;   // A dataset to be filtered.
                     // Set Fields collection and use only visible fields and 
                     // their DisplayLabel for visualization.
DateFormat: String;  // use for date conversion
Filter: String;      // Generated final SQL-filter. (Read-Only)
OnBuildingFilter: procedure( const Field: TField; 
                             var Expr: String; 
                             var Operator: String; 
                             var Value: Variant ); // if event assigned, call for customizing every condition.
OnEditChange: procedure( Sender: TObject ); // OnChange event for TmxEdit boxes. See Delphi help.
procedure AddCustomCondition( const FieldName, Operator, Value: String ); // append custom condition 
                                                                          // to the end of the root level
procedure LoadFromStream( Stream: TStream ); // Load previously saved filter
					     //	from stream
procedure SaveToStream( Stream: TStream ); // Save current filter to stream

Michael Holopov
WEB: http://www.mxhome.net
E-mail: author@mxhome.net