EhLib contains components and classes for Borland Delphi, CodeGear Delphi & C++ Builder, CodeGear RAD Studio, Embarcadero RAD Studio, intended to increase capacity of the client part of database application in part of interaction with applications user.

Vcl.TDBGridhEh
Provides all functionality of TDBGrid and adds several new features as follows:
Allows to select records, columns and rectangle areas.
Special titles that can correspond to several/all columns.
Footer that is able to show sum/count/other field values.
Automatic column resizing to set grid width equal client width.
Ability to change row and title height.
Allows automatic broken of a single line.

Vcl.TPrintDBGridEh
TPrintDBGridEh provides properties and routines for preview and print of TDBGridEh component with several features:
Ability to expand rows vertically until all text is printed.
Ability to scale grid to fit it to page width.
Ability to print/preview title for grid.
Ability to print/preview page header and page footer where you can specify macros for current page, current date, current time and/or.

Vcl.TDBVertGridEh
Component to show one record from dataset in Vertical Orientation.
Have a special column to show Field Captions
Can customize inplace editor and data of the cell like in DBGridEh.

Vcl.TDBLookupComboboxEh
Provides all functionality of TDBLookupCombobox and adds several new features as follows:
Can have flat style.
Allows assign values as to KeyValue property just and to display Text property.
Allows to type (assign) values to Text property not contained in data list (Style = csDropDownEh).
Allows to hold KeyValue and Text as not affecting to each other values.
Take effect when KeyField, ListField,

Vcl.TDBEditEh
Represents a single or multi-line edit control that can display and edit a field in a dataset or can works as non data-aware edit control.

Vcl.TDBDateTimeEditEh
Pepresents a single-line date or time edit control that can display and edit a datetime field in a dataset or can works as non data-aware edit control.

Vcl.TDBComboBoxEh
Represents a single or multi-line edit control that combines an edit box with a scrollable list and can display and edit a field in a dataset or can works as non data-aware combo edit control.

Vcl.TDBNumberEditEh
Represents a single-line number edit control that can display and edit a numeric field in a dataset or can works as non data-aware edit control.

Rtl.TDBSumList
Is intended for totaling sums and amounts of records in a TDataSet with dynamic changes. Component keeps a list of TDBSum objects, which contains types of group operations (goSum or goCount) and name sum field (goCount name of field is unnecessary).

Vcl.TPreviewBox
TPreviewBox lets you create a customizable runtime preview.

Vcl.TPrinterPreview
TPrinterPreview lets you to record printable data in buffer for following output them on screen and to printer. TPrinterPreview have all functions and properties as in TPrinter object. You can use TPrinterPreview object similarly of TPrinter except some details. In TPrinter Printer.Canvas.Handle and Printer.Handle is the same but in TPrinterPreview PrinterPreview.Canvas.Handle represent the.

Rtl.TPropStorageEh
Components realize technology to store component properties to/from settings storage such as ini files, registry etc.

Rtl.TMemTableEh
TMemTableEh - dataset, which hold data in memory. Its possible consider as an array of records.

Besides, it:
Supports a special interface, which allows DBGridEh component to view all data without moving active record.
Allows fetch data from TDataDriverEh object (DataDriver property).
Allows unload change back in DataDriver, operative or postponed (in dependencies of the CachedUpdates property).

Rtl.TDataDriverEh
TDataDriverEh - carry out two tasks:

1. Delivers data to TMemTableEh.

2. Processes changed records of TMemTableEh (writes them in other dataset, or call events for processing the changes in program).

Furthermore, there are several components that inherited from TDataDriverEh. It is a TSQLDataDriverEh, that have properties to keep four SQL expressions and parameters to: query data, delete record,

Rtl.TDataSetDriverEh
DataDriver, that delivers records in TMemTableEh from other DataSet. Processes records, changed in TMemTableEh writing them in other DataSet.

Rtl.TSQLDataDriverEh
TSQLDataDriverEh is a universal driver of data which interact with server by means of SQL. TSQLDataDriverEh have five objects of the TSQLCommandEh type: SelectCommand, DeleteCommand, InsertCommand, UpdateCommand, GetrecCommand. Each object holds SQL expressions and parameters to execute command to, accordingly, query data, delete record, insert record, update record and get record. To execute.

Rtl.TBDEDataDriverEh
DataDriver, which interacts with the DB server using BDE data driver. TBDEDataDriverEh has one additional property - Database of TDatabase type. This property specify a connection, through which DataDriver will send queries for the server.

Rtl.TIBXDataDriverEh
DataDriver, which interacts with the DB server using IBX data driver. TIBXDataDriverEh has one additional property - Database of TIBDatabase type. This property specify a connection, through which DataDriver will send queries for the server.

Rtl.TDBXDataDriverEh
DataDriver, which interacts with the DB server using DBX data driver. TDBXDataDriverEh has one additional property - SQLConnection of TSQLConnection type. This property specify a connection, through which DataDriver will send queries for the server.

Rtl.TADODataDriverEh
DataDriver, which interacts with the DB server using ADO data driver. TADODataDriverEh has one additional property - ADOConnection of TADOConnection type. This property specify a connection, through which DataDriver will send queries for the server.

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