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| unit UnitTest;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls,
Dialogs, ComCtrls;
type
TCustomFont = class(TPersistent)
private
FFont : TFont;
FOnChange : TNotifyEvent;
procedure FontChanged(Sender: TObject);
procedure SetFont(Value : TFont);
public
constructor Create;
destructor destroy; override;
property OnChange : TNotifyEvent read FOnChange write FOnChange;
published
property Font : TFont read FFont write SetFont;
end;
TColorSyntItem = class;
TChangeItemEvent = procedure(Sender : TObject; ColorSyntItem : TColorSyntItem) of object;
TColorSyntItem = class(TCollectionItem)
private
FName: string;
FCustomFont : TCustomFont;
FOnChangeFont : TChangeItemEvent;
procedure FontChanged(Sender: TObject);
function GetDisplayName: string; override;
function GetName : string;
procedure SetName(const Value: string);
public
constructor Create(Collection: TCollection); override;
destructor Destroy; override;
property OnChangeFont : TChangeItemEvent read FOnChangeFont
write FOnChangeFont;
published
property Name: string read GetName write SetName;
property CustomFont : TCustomFont read FCustomFont write FCustomFont;
end;
TColorSyntCollection = class(TCollection)
private
FOwner : TComponent;
FOnChangeFont : TChangeItemEvent;
procedure CustomFontChanged(Sender: TObject;
ColorSyntItem : TColorSyntItem);
protected
function GetOwner : TPersistent; override;
function GetItem(Index: Integer): TColorSyntItem;
procedure SetItem(Index: Integer; Item : TColorSyntItem);
procedure Update(Item: TColorSyntItem);
public
constructor Create(AOwner : TComponent);
function Add : TColorSyntItem;
function Insert(Index: Integer): TColorSyntItem;
property Items[Index: Integer]: TColorSyntItem read GetItem
write SetItem; default;
property OnChangeFont : TChangeItemEvent read FOnChangeFont
write FOnChangeFont;
end;
TTestComponent = Class(TRichEdit)
private
FColorSyntCollection : TColorSyntCollection;
FOnChangeFont : TChangeItemEvent;
procedure CustomFontChanged(Sender: TObject;
ColorSyntItem : TColorSyntItem);
public
constructor Create(AOwner : TComponent); override;
destructor Destroy; override;
published
property ColorSyntCollection : TColorSyntCollection
read FColorSyntCollection write FColorSyntCollection;
property OnChangeFont : TChangeItemEvent read FOnChangeFont
write FOnChangeFont;
end;
procedure Register;
implementation
procedure Register;
begin
RegisterComponents('Test',[TTestComponent]);
end;
{ TTestComponent }
constructor TTestComponent.Create(AOwner : TComponent);
begin
inherited;
FColorSyntCollection := TColorSyntCollection.Create(Self);
FColorSyntCollection.OnChangeFont := CustomFontChanged;
end;
destructor TTestComponent.Destroy;
begin
FreeAndNil(FColorSyntCollection);
inherited;
end;
procedure TTestComponent.CustomFontChanged(Sender: TObject;
ColorSyntItem : TColorSyntItem);
begin
if Assigned(FOnChangeFont) then OnChangeFont(Self,ColorSyntItem);
end;
{ TCustomFont }
constructor TCustomFont.Create;
begin
inherited Create;
FFont := TFont.Create;
FFont.OnChange := FontChanged;
end;
destructor TCustomFont.Destroy;
begin
FreeAndNil(FFont);
inherited;
end;
procedure TCustomFont.SetFont(Value: TFont);
begin
FFont.Assign(Value);
end;
procedure TCustomFont.FontChanged(Sender: TObject);
begin
if Assigned(FOnChange) then OnChange(Self);
end;
{ TColorSyntItem }
function TColorSyntItem.GetDisplayName: string;
begin
if FName <> '' then
begin
Result := FName;
end
else
Result := SysUtils.Format('Item %d',[Index]);
end;
function TColorSyntItem.GetName : string;
begin
Result := GetDisplayName;
end;
procedure TColorSyntItem.SetName(const Value: string);
begin
if Value <> FName then
FName := Value;
end;
constructor TColorSyntItem.Create(Collection: TCollection);
begin
inherited;
FCustomFont := TCustomFont.Create;
FCustomFont.OnChange := FontChanged;
end;
destructor TColorSyntItem.Destroy;
begin
FreeAndNil(FCustomFont);
inherited;
end;
procedure TColorSyntItem.FontChanged(Sender: TObject);
begin
if Assigned(Collection) then
begin
if Collection is TColorSyntCollection then
TColorSyntCollection(Collection).CustomFontChanged(Self,Self);
end;
if Assigned(FOnChangeFont) then OnChangeFont(Self,Self);
end;
{ TColorSyntCollection }
function TColorSyntCollection.Add: TColorSyntItem;
begin
Result := TColorSyntItem(inherited Add);
end;
constructor TColorSyntCollection.Create(AOwner: TComponent);
begin
inherited Create(TColorSyntItem);
FOwner := AOwner;
end;
function TColorSyntCollection.GetItem(Index: Integer): TColorSyntItem;
begin
Result := TColorSyntItem(inherited GetItem(Index));
end;
function TColorSyntCollection.GetOwner: TPersistent;
begin
Result := FOwner;
end;
function TColorSyntCollection.Insert(Index: Integer): TColorSyntItem;
begin
Result := TColorSyntItem(inherited Insert(Index));
end;
procedure TColorSyntCollection.SetItem(Index: Integer; Item : TColorSyntItem);
begin
inherited SetItem(Index, Item);
end;
procedure TColorSyntCollection.Update(Item: TColorSyntItem);
begin
inherited Update(Item);
end;
procedure TColorSyntCollection.CustomFontChanged(Sender: TObject;
ColorSyntItem : TColorSyntItem);
begin
if Assigned(FOnChangeFont) then OnChangeFont(Self,ColorSyntItem);
end;
end. |
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