david
78ab77cd4c
git-svn-id: https://192.168.0.254/svn/Componentes.Terceros.jvcl@19 7f62d464-2af8-f54e-996c-e91b33f51cbe
356 lines
12 KiB
ObjectPascal
356 lines
12 KiB
ObjectPascal
{-----------------------------------------------------------------------------
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The contents of this file are subject to the Mozilla Public License
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Version 1.1 (the "License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.mozilla.org/MPL/MPL-1.1.html
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Software distributed under the License is distributed on an "AS IS" basis,
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WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the License for
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the specific language governing rights and limitations under the License.
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The Original Code is: JvDBActionsEngineControlCxGrid.Pas, released on 2004-12-30.
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The Initial Developer of the Original Code is Jens Fudickar [jens dott fudicker att oratool dott de]
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Portions created by Jens Fudickar are Copyright (C) 2002 Jens Fudickar.
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All Rights Reserved.
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Contributor(s): -
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You may retrieve the latest version of this file at the Project JEDI's JVCL home page,
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located at http://jvcl.delphi-jedi.org
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Known Issues:
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-----------------------------------------------------------------------------}
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// $Id: JvDBActionsEngineControlCxGrid.pas 12461 2009-08-14 17:21:33Z obones $
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unit JvDBActionsEngineControlCxGrid;
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{$I jvcl.inc}
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interface
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uses
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{$IFDEF UNITVERSIONING}
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JclUnitVersioning,
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{$ENDIF UNITVERSIONING}
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Forms, Controls, Classes, DB,
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{$IFDEF USE_3RDPARTY_DEVEXPRESS_CXGRID}
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cxGridCustomTableView, cxDBData, cxGridCustomView,
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{$ENDIF USE_3RDPARTY_DEVEXPRESS_CXGRID}
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JvDBActionsEngine;
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{$IFDEF USE_3RDPARTY_DEVEXPRESS_CXGRID}
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type
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TJvDatabaseActionDevExpCxGridControlEngine = class(TJvDatabaseActionBaseControlEngine)
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private
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function DBDataController(AActionComponent: TComponent): TcxDBDataController;
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protected
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function GridView(AActionComponent: TComponent): TcxCustomGridView;
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function GridTableView(AActionComponent: TComponent): TcxCustomGridTableView;
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function IsGridMode(AActionComponent: TComponent): Boolean;
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public
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constructor Create(AOwner: TComponent); override;
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function Bof(AActionComponent: TComponent): Boolean; override;
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function RecNo(AActionComponent: TComponent): Integer; override;
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function RecordCount(AActionComponent: TComponent): Integer; override;
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function CanInsert(AActionComponent: TComponent): Boolean; override;
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function CanUpdate(AActionComponent: TComponent): Boolean; override;
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function CanDelete(AActionComponent: TComponent): Boolean; override;
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function CanNavigate(AActionComponent: TComponent): Boolean; override;
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function DataSource(AActionComponent: TComponent): TDataSource; override;
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procedure First(AActionComponent: TComponent); override;
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function GotoSelectedRow(AActionComponent: TComponent; const ASelectedRow:
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Integer): Boolean; override;
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procedure Last(AActionComponent: TComponent); override;
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procedure MoveBy(AActionComponent: TComponent; Distance: Integer); override;
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function SelectedField(AActionComponent: TComponent): TField; override;
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function SelectedRowsCount(AActionComponent: TComponent): Integer; override;
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function SupportsComponent(AActionComponent: TComponent): Boolean; override;
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end;
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{$ENDIF USE_3RDPARTY_DEVEXPRESS_CXGRID}
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{$IFDEF UNITVERSIONING}
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const
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UnitVersioning: TUnitVersionInfo = (
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RCSfile:
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'$URL: https://jvcl.svn.sourceforge.net/svnroot/jvcl/tags/JVCL3_39/run/JvDBActionsEngineControlCxGrid.pas $';
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Revision: '$Revision: 12461 $';
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Date: '$Date: 2009-08-14 19:21:33 +0200 (ven., 14 août 2009) $';
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LogPath: 'JVCL\run'
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);
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{$ENDIF UNITVERSIONING}
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implementation
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uses
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{$IFDEF USE_3RDPARTY_DEVEXPRESS_CXGRID}
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cxGrid, cxGridDBDataDefinitions, cxGridDBChartView,
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cxCustomData, cxGridTableView,
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{$ENDIF USE_3RDPARTY_DEVEXPRESS_CXGRID}
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Variants, SysUtils, Grids;
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//=== { TJvDatabaseActionDevExpCxGridControlEngine } =========================
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{$IFDEF USE_3RDPARTY_DEVEXPRESS_CXGRID}
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constructor TJvDatabaseActionDevExpCxGridControlEngine.Create(AOwner: TComponent);
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begin
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inherited Create(AOwner);
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Name := 'TJvDatabaseActionDevExpCxGridControlEngine';
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.GridView(AActionComponent:
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TComponent): TcxCustomGridView;
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begin
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if Assigned(AActionComponent) then
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if AActionComponent is TcxGrid then
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if TcxGrid(AActionComponent).FocusedView is TcxCustomGridView then
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Result := TcxCustomGridView(TcxGrid(AActionComponent).FocusedView)
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else
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Result := nil
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else if AActionComponent is TcxCustomGridView then
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Result := TcxCustomGridView(AActionComponent)
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else
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Result := nil
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else
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Result := nil;
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.GridTableView(
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AActionComponent: TComponent): TcxCustomGridTableView;
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begin
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if Assigned(AActionComponent) then
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if AActionComponent is TcxGrid then
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if TcxGrid(AActionComponent).FocusedView is TcxCustomGridTableView then
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Result := TcxCustomGridTableView(TcxGrid(AActionComponent).FocusedView)
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else
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Result := nil
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else if AActionComponent is TcxCustomGridTableView then
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Result := TcxCustomGridTableView(AActionComponent)
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else
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Result := nil
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else
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Result := nil;
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.DataSource(
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AActionComponent: TComponent): TDataSource;
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begin
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if Assigned(DBDataController(AActionComponent)) then
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Result := DBDataController(AActionComponent).DataSource
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else
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Result := inherited DataSource(AActionComponent)
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.SupportsComponent(
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AActionComponent: TComponent): Boolean;
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begin
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Result := Assigned(GridView(AActionComponent));
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.Bof(AActionComponent:
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TComponent): Boolean;
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begin
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if Assigned(GridView(AActionComponent)) then
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Result := GridView(AActionComponent).DataController.FocusedRowIndex = 0
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else
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Result := inherited Bof(AActionComponent);
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.RecNo(AActionComponent:
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TComponent): Integer;
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begin
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if Assigned(GridView(AActionComponent)) then
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if GridView(AActionComponent).DataController.IsGridMode then
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Result := inherited RecNo(AActionComponent)
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else
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Result := GridView(AActionComponent).DataController.FocusedRowIndex + 1
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else
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Result := inherited RecNo(AActionComponent);
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.RecordCount(
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AActionComponent: TComponent): Integer;
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begin
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if Assigned(GridView(AActionComponent)) then
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if GridView(AActionComponent).DataController.IsGridMode then
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Result := inherited RecordCount(AActionComponent)
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else
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Result := GridView(AActionComponent).DataController.FilteredRecordCount
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else
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Result := inherited RecordCount(AActionComponent);
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.CanInsert(AActionComponent:
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TComponent): Boolean;
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begin
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if Assigned(GridTableView(AActionComponent)) then
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Result := GridTableView(AActionComponent).OptionsData.Inserting and inherited
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CanInsert(AActionComponent)
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else if Assigned(GridView(AActionComponent)) then
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Result := False // GridView must be a ChartView, and then Insert makes no sense
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else
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Result := inherited CanInsert(AActionComponent);
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.CanUpdate(AActionComponent:
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TComponent): Boolean;
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begin
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if Assigned(GridTableView(AActionComponent)) then
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Result := GridTableView(AActionComponent).OptionsData.Editing and inherited
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CanUpdate(AActionComponent)
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else if Assigned(GridView(AActionComponent)) then
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Result := False // GridView must be a ChartView, and then Update makes no sense
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else
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Result := inherited CanUpdate(AActionComponent);
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.CanDelete(AActionComponent:
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TComponent): Boolean;
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begin
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if Assigned(GridTableView(AActionComponent)) then
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Result := GridTableView(AActionComponent).OptionsData.Deleting and inherited
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CanDelete(AActionComponent)
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else if Assigned(GridView(AActionComponent)) then
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Result := False // GridView must be a ChartView, and then Delete makes no sense
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else
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Result := inherited CanDelete(AActionComponent);
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.CanNavigate(
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AActionComponent: TComponent): Boolean;
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begin
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Result := Assigned(GridTableView(AActionComponent));
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end;
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procedure TJvDatabaseActionDevExpCxGridControlEngine.First(AActionComponent:
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TComponent);
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begin
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if Assigned(GridTableView(AActionComponent)) then
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GridTableView(AActionComponent).DataController.GotoFirst
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else
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inherited First(AActionComponent);
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.DBDataController(
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AActionComponent: TComponent): TcxDBDataController;
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begin
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if Assigned(GridView(AActionComponent)) and (GridView(AActionComponent).DataController is
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TcxDBDataController) then
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Result := TcxDBDataController(GridView(AActionComponent).DataController)
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else
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Result := nil;
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.GotoSelectedRow(
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AActionComponent: TComponent; const ASelectedRow: Integer): Boolean;
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var
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Bkm: {$IFDEF RTL200_UP}TBookmark{$ELSE}TBookmarkStr{$ENDIF RTL200_UP};
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RecIdx: Integer;
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RecID: Variant;
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begin
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if Assigned(DBDataController(AActionComponent)) and Assigned(Dataset(AActionComponent)) and
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Assigned(GridTableView(AActionComponent)) then
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try
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if IsGridMode(AActionComponent) then
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begin
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Bkm := DBDataController(AActionComponent).GetSelectedBookmark(ASelectedRow);
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if Dataset(AActionComponent).BookmarkValid(TBookmark(Bkm)) then
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begin
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Dataset(AActionComponent).Bookmark := Bkm;
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Result := True;
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end
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else
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Result := False;
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end
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else
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begin
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RecIdx :=
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GridTableView(AActionComponent).Controller.SelectedRecords[ASelectedRow].RecordIndex;
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RecID := GridTableView(AActionComponent).DataController.GetRecordId(RecIdx);
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Result :=
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Dataset(AActionComponent).Locate(DBDataController(AActionComponent).KeyFieldNames, RecID,
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[loPartialKey]);
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end;
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except
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Result := False;
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end
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else
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Result := False;
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.IsGridMode(AActionComponent
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: TComponent): Boolean;
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begin
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if Assigned(DBDataController(AActionComponent)) then
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Result := DBDataController(AActionComponent).DataModeController.GridMode
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else
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Result := True;
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end;
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procedure TJvDatabaseActionDevExpCxGridControlEngine.Last(AActionComponent:
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TComponent);
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begin
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if Assigned(GridView(AActionComponent)) then
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GridView(AActionComponent).DataController.GotoLast
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else
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inherited Last(AActionComponent);
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end;
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procedure TJvDatabaseActionDevExpCxGridControlEngine.MoveBy(AActionComponent:
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TComponent; Distance: Integer);
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begin
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if Assigned(GridView(AActionComponent)) then
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GridView(AActionComponent).DataController.MoveBy(Distance)
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else
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inherited MoveBy(AActionComponent, Distance);
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.SelectedField(
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AActionComponent: TComponent): TField;
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var Item : TcxCustomGridTableItem;
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begin
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Result := nil;
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if GridView(AActionComponent).Controller is TcxCustomGridTableController then
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begin
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Item := TcxCustomGridTableController(GridView(AActionComponent).Controller).FocusedItem;
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if Assigned(Item) and
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(Item is TcxGridColumn) and
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(Item.DataBinding is TcxGridItemDBDataBinding) then
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Result := TcxGridItemDBDataBinding(Item.DataBinding).Field;
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end;
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end;
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function TJvDatabaseActionDevExpCxGridControlEngine.SelectedRowsCount(
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AActionComponent: TComponent): Integer;
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begin
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if Assigned(GridView(AActionComponent)) then
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Result := GridView(AActionComponent).DataController.GetSelectedCount
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else
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Result := inherited SelectedRowsCount(AActionComponent);
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end;
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{$ENDIF USE_3RDPARTY_DEVEXPRESS_CXGRID}
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procedure InitActionEngineList;
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begin
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{$IFDEF USE_3RDPARTY_DEVEXPRESS_CXGRID}
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RegisterDatabaseActionEngine(TJvDatabaseActionDevExpCxGridControlEngine);
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{$ENDIF USE_3RDPARTY_DEVEXPRESS_CXGRID}
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end;
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initialization
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{$IFDEF UNITVERSIONING}
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RegisterUnitVersion(HInstance, UnitVersioning);
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{$ENDIF UNITVERSIONING}
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InitActionEngineList;
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finalization
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{$IFDEF UNITVERSIONING}
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UnregisterUnitVersion(HInstance);
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{$ENDIF UNITVERSIONING}
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end.
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