让你的DBGrid竖着站（1）

申明：本源代码非本人所写，只是粘贴他人作品,目的是为了推广!
{*********************************************************************************}
{
File Name.......: DBVGrids.zip
File Description: Implementation of a Vertical DBGrid based on Vcl''''s DBGrids.pas.
Targets.........: Delphi 3.
Author Name.....: George Vavoylogiannis
EMail...........: georgev@hol.gr
WEB.............: http://users.hol.gr/~georgev
File Status.....: Freeware
Category........: Database components.

  For a long time till a few months, i was trying to find a solution for
  vertical grid. I found a few grid components that claimed to be vertical, but
  this was far from tue.
  So one day i decided to have a better look at the DBGrids.pas in Borland VCL source.
  "Bit by bit" as we say in Greece i started changing the code and finally
  a TRUE VERTICAL DBGRID component is what we have here.

  I wonder why Borland did''''t think about this. After all it seems so SIMPLE!!!

  NEW PROPERTIES
  Vertical: Boolean, set to True and and the grid becomes VERTICAL
  OnlyOne: Boolean, set to true if you want the grid to display only one record
           at a time (the curent record).
  TitlesWidth: integer, set the vertical column title''''s width.

  NOTE: because all the code is duplicated from the VCL, all the classes are
  redefined (TColumn, TDBGridColumns, TGridDatalink e.t.c).
  The columns editor works fine except that it does not bring the fields list.
  This is something that i may do in future versions but if someone find''''s a
  way to solve it or even has property editor for the columns please drop me
  an E-Mail.

Free to use and redistribute, but my name must
appear somewhere in the source code, or in the software.
No warranty is given by the author, expressed or implied.

WARNING! THE CODE IS PROVIDED AS IS WITH NO GUARANTEES OF ANY KIND!
USE THIS AT YOUR OWN RISK - YOU ARE THE ONLY PERSON RESPONSIBLE FOR
ANY DAMAGE THIS CODE MAY CAUSE - YOU HAVE BEEN WARNED!

}
{**********************************************************************************}

unit DBVGrids;

{$R-}

interface

uses Windows, SysUtils, Messages, Classes, Controls, Forms, StdCtrls,
  Graphics, Grids, DBCtrls, Db, Menus, DBGrids, Variants;

type
  TColumnValue = (cvColor, cvWidth, cvFont, cvAlignment, cvReadOnly, cvTitleColor,
    cvTitleCaption, cvTitleAlignment, cvTitleFont, cvImeMode, cvImeName);
  TColumnValues = set of TColumnValue;

const
  ColumnTitleValues = [cvTitleColor..cvTitleFont];
  cm_DeferLayout = WM_USER + 100;

{ TColumn defines internal storage for column attributes.  Values assigned
  to properties are stored in this object, the grid- or field-based default
  sources are not modified.  Values read from properties are the previously
  assigned value, if any, or the grid- or field-based default values if
  nothing has been assigned to that property. This class also publishes the
  column attribute properties for persistent storage.  }
type
  TColumn = class;
  TCustomVDBGrid = class;

  TColumnTitle = class(TPersistent)
  private
    FColumn: TColumn;
    FCaption: string;
    FFont: TFont;
    FColor: TColor;
    FAlignment: TAlignment;
    procedure FontChanged(Sender: TObject);
    function GetAlignment: TAlignment;
    function GetColor: TColor;
    function GetCaption: string;
    function GetFont: TFont;
    function IsAlignmentStored: Boolean;
    function IsColorStored: Boolean;
    function IsFontStored: Boolean;
    function IsCaptionStored: Boolean;
    procedure SetAlignment(Value: TAlignment);
    procedure SetColor(Value: TColor);
    procedure SetFont(Value: TFont);
    procedure SetCaption(const Value: string); virtual;
  protected
    procedure RefreshDefaultFont;
  public
    constructor Create(Column: TColumn);
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    function DefaultAlignment: TAlignment;
    function DefaultColor: TColor;
    function DefaultFont: TFont;
    function DefaultCaption: string;
    procedure RestoreDefaults; virtual;
  published
    property Alignment: TAlignment read GetAlignment write SetAlignment
      stored IsAlignmentStored;
    property Caption: string read GetCaption write SetCaption stored IsCaptionStored;
    property Color: TColor read GetColor write SetColor stored IsColorStored;
    property Font: TFont read GetFont write SetFont stored IsFontStored;
  end;

  TColumnButtonStyle = (cbsAuto, cbsEllipsis, cbsNone);

  TColumn = class(TCollectionItem)
  private
    FField: TField;
    FFieldName: string;
    FColor: TColor;
    FWidth: Integer;
    FTitle: TColumnTitle;
    FFont: TFont;
    FImeMode: TImeMode;
    FImeName: TImeName;
    FPickList: TStrings;
    FPopupMenu: TPopupMenu;
    FDropDownRows: Cardinal;
    FButtonStyle: TColumnButtonStyle;
    FAlignment: TAlignment;
    FReadonly: Boolean;
    FAssignedValues: TColumnValues;
    procedure FontChanged(Sender: TObject);
    function  GetAlignment: TAlignment;
    function  GetColor: TColor;
    function  GetField: TField;
    function  GetFont: TFont;
    function  GetImeMode: TImeMode;
    function  GetImeName: TImeName;
    function  GetPickList: TStrings;
    function  GetReadOnly: Boolean;
    function  GetWidth: Integer;
    function  IsAlignmentStored: Boolean;
    function  IsColorStored: Boolean;
    function  IsFontStored: Boolean;
    function  IsImeModeStored: Boolean;
    function  IsImeNameStored: Boolean;
    function  IsReadOnlyStored: Boolean;
    function  IsWidthStored: Boolean;
    procedure SetAlignment(Value: TAlignment); virtual;
    procedure SetButtonStyle(Value: TColumnButtonStyle);
    procedure SetColor(Value: TColor);
    procedure SetField(Value: TField); virtual;
    procedure SetFieldName(const Value: String);
    procedure SetFont(Value: TFont);
    procedure SetImeMode(Value: TImeMode); virtual;
    procedure SetImeName(Value: TImeName); virtual;
    procedure SetPickList(Value: TStrings);
    procedure SetPopupMenu(Value: TPopupMenu);
    procedure SetReadOnly(Value: Boolean); virtual;
    procedure SetTitle(Value: TColumnTitle);
    procedure SetWidth(Value: Integer); virtual;
  protected
    function  CreateTitle: TColumnTitle; virtual;
    function  GetGrid: TCustomVDBGrid;
    function GetDisplayName: string; override;
    procedure RefreshDefaultFont;
  public
    constructor Create(Collection: TCollection); override;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    function  DefaultAlignment: TAlignment;
    function  DefaultColor: TColor;
    function  DefaultFont: TFont;
    function  DefaultImeMode: TImeMode;
    function  DefaultImeName: TImeName;
    function  DefaultReadOnly: Boolean;
    function  DefaultWidth: Integer;
    procedure RestoreDefaults; virtual;
    property  Grid: TCustomVDBGrid read GetGrid;
    property  AssignedValues: TColumnValues read FAssignedValues;
    property  Field: TField read GetField write SetField;
  published
    property  Alignment: TAlignment read GetAlignment write SetAlignment
      stored IsAlignmentStored;
    property  ButtonStyle: TColumnButtonStyle read FButtonStyle write SetButtonStyle
      default cbsAuto;
    property  Color: TColor read GetColor write SetColor stored IsColorStored;
    property  DropDownRows: Cardinal read FDropDownRows write FDropDownRows default 7;
    property  FieldName: String read FFieldName write SetFieldName;

[1] [2] [3] [4] [5] [6] [7] [8] [9] [10]  ...  下一页 >> 

Copyright ＠ 2007-2012 敏韬网(敏而好学，文韬武略--MinTao.Net)（学习笔记） Inc All Rights Reserved.
闵涛 E_mail:admin@mintao.net(欢迎提供学习资源)

鄂公网安备 42011102001154号

站长：MinTao ICP备案号：鄂ICP备11006601号-18