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unit OWEdit;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls;
type
TInputDataType = (tFloat,tInteger,tAll);
type
TOWEdit = class(TEdit)
private
{ Private declarations }
FCanvas : TCanvas;
FDataType: TInputDataType;
FAlignment : TAlignment;
FDisplayFormat : String;
FDeciNum : Word;
FDisplayText : String;
procedure WMPaint(var Message: TWMPaint); message WM_PAINT;
protected
{ Protected declarations }
procedure SetDataType(Value:TInputDataType);
procedure SetAlignment(Value:TAlignment);
procedure SetDisplayFormat(Value:String);
procedure ClipPaste(var M:TMessage); Message WM_PASTE;
procedure PaintWindow(DC: HDC); override;
procedure Paint; virtual;
procedure WMExit(var Message:TWMKillFocus);Message WM_KILLFOCUS;
procedure GetDisplayText;
procedure ShowDisplayText;
function GetDeciLast:integer;
public
{ Public declarations }
OldText : String;
property Text;
property Canvas: TCanvas read FCanvas;
constructor Create(AOwner: TComponent); override;
destructor Destroy(); override;
procedure KeyPress(var Key: Char); override;
procedure KeyDown(var Key: Word; Shift: TShiftState); override;
published
{ Published declarations }
property DataType: TInputDataType read fDataType write SetDataType default tFloat;
property Alignment: TAlignment read FAlignment write SetAlignment default taLeftJustify;
property DisplayFormat: string read FDisplayFormat write SetDisplayFormat;
end;
procedure Register;
implementation
procedure Register;
begin
RegisterComponents(\'Ourway\', [TOWEdit]);
end;
constructor TOWEdit.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
Text := \'0\';
FCanvas := TControlCanvas.Create;
TControlCanvas(FCanvas).Control := Self;
FDeciNum := 9999;
end;
destructor TOWEdit.Destroy();
begin
FCanvas.Free;
inherited Destroy();
end;
procedure TOWEdit.SetDataType(Value:TInputDataType);
begin
If Value<>fDataType Then
begin
fDataType := Value;
Case Value of
tAll: Text := \';
tFloat: Text:=\'0.0\';
tInteger: Text:=\'0\';
end;
ShowDisplayText;
Invalidate;
end;
end;
procedure TOWEdit.SetAlignment(Value:TAlignment);
begin
If Value<>FAlignment Then
begin
FAlignment := Value;
Invalidate;
end;
end;
procedure TOWEdit.SetDisplayFormat(Value: string);
begin
If Value<>FDisplayFormat Then
begin
FDisplayFormat := Value;
if Trim(Value)<>\' then
FDeciNum := Length(Value)-Pos(\'.\',Value)+1
else
FDeciNum := 9999;
ShowDisplayText;
Invalidate;
end;
end;
procedure TOWEdit.KeyDown(var Key: Word; Shift: TShiftState);
begin
if Key = VK_DELETE then
if Self.SelStart=pos(\'.\',Self.Text)-1 then
Key := 0;
inherited KeyDown(Key,Shift);
end;
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