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{ $Id$}
{
*****************************************************************************
* WSGrids.pp *
* ---------- *
* *
* *
*****************************************************************************
*****************************************************************************
This file is part of the Lazarus Component Library (LCL)
See the file COPYING.modifiedLGPL.txt, included in this distribution,
for details about the license.
*****************************************************************************
}
unit WSGrids;
{$mode objfpc}{$H+}
{$I lcl_defines.inc}
interface
////////////////////////////////////////////////////
// I M P O R T A N T
////////////////////////////////////////////////////
// 1) Only class methods allowed
// 2) Class methods have to be published and virtual
// 3) To get as little as posible circles, the uses
// clause should contain only those LCL units
// needed for registration. WSxxx units are OK
// 4) To improve speed, register only classes in the
// initialization section which actually
// implement something
// 5) To enable your XXX widgetset units, look at
// the uses clause of the XXXintf.pp
////////////////////////////////////////////////////
uses
////////////////////////////////////////////////////
// To get as little as posible circles,
// uncomment only when needed for registration
////////////////////////////////////////////////////
LCLType, Types, Controls, StdCtrls, Grids, LazUTF8, Graphics,
////////////////////////////////////////////////////
WSLCLClasses, WSControls, WSFactory;
type
{ TWSCustomGrid }
TWSCustomGrid = class(TWSCustomControl)
published
class procedure SendCharToEditor(AEditor:TWinControl; Ch: TUTF8Char); virtual;
class function InvalidateStartY(const FixedHeight, RowOffset: Integer): integer; virtual;
class procedure Invalidate(sender: TCustomGrid); virtual; reintroduce;
class function GetEditorBoundsFromCellRect(ACanvas: TCanvas;
const ACellRect: TRect; const AColumnLayout: TTextLayout): TRect; virtual;
end;
TWSCustomGridClass = class of TWSCustomgrid;
{ WidgetSetRegistration }
function RegisterCustomGrid: Boolean;
implementation
uses
LCLIntf;
type
TCustomGridAccess=class(TCustomGrid)
end;
{ TWSCustomGrid }
class procedure TWSCustomGrid.SendCharToEditor(AEditor:TWinControl;
Ch: TUTF8Char);
var
GMsg: TGridMessage;
GridEditor: boolean;
begin
GMsg.Grid := nil;
GMsg.Options:= 0;
GMsg.LclMsg.Msg:=GM_GETGRID;
AEditor.Dispatch(GMsg);
GridEditor := (GMsg.Options and EO_IMPLEMENTED<>0) and (GMsg.Grid<>nil);
GMsg.LclMsg.Msg:=GM_SETVALUE;
if Ch=#8 then // backspace
GMsg.Value:=''
else
GMsg.Value:=Ch;
if GridEditor then
AEditor.Dispatch(GMsg)
else begin
// TODO: Find a generic way ...
if AEditor is TCustomEdit then begin
TCustomEdit(AEditor).Text:=GMsg.Value;
TCustomEdit(AEditor).SelStart:=UTF8Length(GMsg.Value);
end else
if AEditor is TCustomCombobox then begin
TCustomCombobox(AEditor).Text:=GMsg.Value;
TCustomCombobox(AEditor).SelStart:=UTF8Length(GMsg.Value);
end;
end;
// make sure the grid is notified that some text is changed, some
// widgets do not notify when they are modified programmatically.
if GMsg.Grid<>nil then
with TCustomGridAccess(GMsg.Grid) do
EditorTextChanged(Col, Row, GMsg.Value);
end;
class function TWSCustomGrid.GetEditorBoundsFromCellRect(ACanvas: TCanvas;
const ACellRect: TRect; const AColumnLayout: TTextLayout): TRect;
begin
Result := ACellRect;
Dec(Result.Right);
Dec(Result.Bottom);
end;
class function TWSCustomGrid.InvalidateStartY(const FixedHeight,
RowOffset: Integer): integer;
begin
result := FixedHeight;
end;
class procedure TWSCustomGrid.Invalidate(sender: TCustomGrid);
begin
// override in widgetset level if needed
end;
{ WidgetSetRegistration }
function RegisterCustomGrid: Boolean;
const
Done: Boolean = False;
begin
Result := False;
if Done then exit;
if not WSRegisterCustomGrid then
RegisterWSComponent(TCustomGrid, TWSCustomGrid);
Done := True;
Result := True;
end;
end.
|
