Chip 1999 January/Chip_1999-01_cd.bin/zkuste/delphi/QDB/QDBG.ZIP/qdbgreg.pas

Pascal/Delphi Source File | 1998-07-29 | 5KB | 175 lines

unit qdbgreg;

interface

uses
  DsgnIntf;

type
  TQDBGridEditor = class(TComponentEditor)
  public
    function GetVerb(Index: Integer): string; override;
    function GetVerbCount: Integer; override;
    procedure ExecuteVerb(Index: Integer); override;
  end;

procedure Register;

implementation

uses
  SysUtils, Classes, Dialogs, Forms, TypInfo, Controls,
  QDBView, QDBGrids, QDBGEdt;

(*
{$IFDEF WIN32}
  {$R QDBVREG.R32}
{$ELSE}
  {$R QDBVREG.R16}
{$ENDIF}
*)

function TQDBGridEditor.GetVerb(Index: Integer): string;
begin
  case Index of
    0: Result:='Edit ' + Component.Name;
    1: Result:='Load field defintions from QDB file';
  else
  end;
end;

function TQDBGridEditor.GetVerbCount: Integer;
var
  t: TQDBItem;
begin
  Result:=0;
  if (Component as TQDBGrid).QDBItem = nil then
    Exit;
  t:=TQDBItem.Create(nil);
  try
    t.ReadOnly:=true;
    t.FileName:=(Component as TQDBGrid).QDBItem.Filename;
    t.FetchStructure;
    if t.FieldCount > 0 then
      Result := 2;
  finally
    t.Free;
  end;
end;

type
  THack = class(TQDBGrid);

procedure TQDBGridEditor.ExecuteVerb(Index: Integer);
var
  D: TQDBGridEditDlg;
  t: TQDBItem;
  x: TQDBItem;
  n: integer;
  wasreadonly: boolean;
begin
  case Index of
    0:
      begin
        D := TQDBGridEditDlg.Create(Application);
        try
          with Component as TQDBGrid do
          begin
            D.Caption := Owner.Name + '.' + Name + D.Caption;
            D.QDBGrid.Color:=Color;
            D.QDBGrid.DefaultColWidth:=DefaultColWidth;
            D.QDBGrid.DisplayThumbnails:=DisplayThumbnails;
            D.QDBGrid.FixedColor:=FixedColor;
            D.QDBGrid.Font:=Font;
            D.QDBGrid.MatchRowHeightToFont:=MatchRowHeightToFont;
            D.QDBGrid.Options:=Options + [QDBGrids.goSelectColumns];
            D.QDBGrid.TitleFont:=TitleFont;
            THack(D.QDBGrid).SetColumnCount(ColCount);
            for n:=0 to Columns.Count-1 do
            begin
              D.QDBGrid.Columns[n].Alignment:=Columns[n].Alignment;
              D.QDBGrid.Columns[n].ButtonStyle:=Columns[n].ButtonStyle;
              D.QDBGrid.Columns[n].Color:=Columns[n].Color;
              D.QDBGrid.Columns[n].DisplayMask:=Columns[n].DisplayMask;
              D.QDBGrid.Columns[n].DropDownRows:=Columns[n].DropDownRows;
              D.QDBGrid.Columns[n].EditMask:=Columns[n].EditMask;
              D.QDBGrid.Columns[n].Font:=Columns[n].Font;
              D.QDBGrid.Columns[n].LimitToList:=Columns[n].LimitToList;
              D.QDBGrid.Columns[n].PickList:=Columns[n].PickList;
              D.QDBGrid.Columns[n].ReadOnly:=Columns[n].ReadOnly;
              D.QDBGrid.Columns[n].Title:=Columns[n].Title;
              D.QDBGrid.Columns[n].TitleAlignment:=Columns[n].TitleAlignment;
              D.QDBGrid.Columns[n].TitleFont:=Columns[n].TitleFont;
              D.QDBGrid.ColWidths[n]:=ColWidths[n];
            end;
            D.QDBGrid.QDBItem:=QDBItem;
            D.QDBGrid.QDBItem.FileName:=QDBItem.FileName;
            wasreadonly:=QDBItem.ReadOnly;
            D.QDBGrid.QDBItem.ReadOnly:=true;
          end;
          if D.ShowModal = mrOK then
          begin
            with Component as TQDBGrid do
            begin
              for n:=0 to Columns.Count-1 do
              begin
                Columns[n].Alignment:= D.QDBGrid.Columns[n].Alignment;
                Columns[n].ButtonStyle:= D.QDBGrid.Columns[n].ButtonStyle;
                Columns[n].Color:= D.QDBGrid.Columns[n].Color;
                Columns[n].DisplayMask:= D.QDBGrid.Columns[n].DisplayMask;
                Columns[n].DropDownRows:= D.QDBGrid.Columns[n].DropDownRows;
                Columns[n].EditMask:= D.QDBGrid.Columns[n].EditMask;
                Columns[n].Font:= D.QDBGrid.Columns[n].Font;
                Columns[n].LimitToList:= D.QDBGrid.Columns[n].LimitToList;
                Columns[n].PickList:= D.QDBGrid.Columns[n].PickList;
                Columns[n].ReadOnly:= D.QDBGrid.Columns[n].ReadOnly;
                Columns[n].Title:= D.QDBGrid.Columns[n].Title;
                Columns[n].TitleAlignment:= D.QDBGrid.Columns[n].TitleAlignment;
                Columns[n].TitleFont:= D.QDBGrid.Columns[n].TitleFont;
                ColWidths[n]:= D.QDBGrid.ColWidths[n];
              end;
              QDBItem.ReadOnly:=wasreadonly;
            end;
            Designer.Modified;
          end;
        finally
          D.Free;
        end;
     end;
    1:
      begin
        t:=TQDBItem.Create(nil);
        try
          with (Component as THack) do
          begin
            x:=QDBItem;
            QDBItem:=t;
            QDBItem.FileName:=x.FileName;
            QDBItem.FetchStructure;
            THack(Component).SetColumnCount(FixedCols + QDBItem.FieldCount);
            for n:=0 to FixedCols-1 do
            begin
              Columns[n].Title:='';
            end;
            for n:=FixedCols to Columns.Count-1 do
            begin
              Columns[n].Title:=QDBItem.FieldNames[n-FixedCols];
            end;
            QDBItem:=x;
          end;
         finally
           t.Free;
         end;
      end;
  else
  end;
end;

procedure Register;
begin
  RegisterComponents('IHSoftware', [TQDBGrid]);
  RegisterComponentEditor(TQDBGrid,TQDBGridEditor);
end;

end.