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| ///////////////////////////////////////////////////////////////////////////
// //
// Copyright (c) 2015 by Charta Software B.V. //
// All rights reserved //
// //
// Version: 1.7.0.83525 //
// Web site: https://pascal.chartasoftware.com/ //
// //
// This code and information are provided "as is" without warranty of //
// any kind. Dissemination of this information or reproduction of //
// this material is strictly forbidden unless prior written permission //
// is obtained from Charta Software B.V.. //
// //
///////////////////////////////////////////////////////////////////////////
unit UserInterface.Control.Style;
interface
uses
Collection.List,
Drawing.Fill,
Event,
Integer._32,
Object_.Base,
Object_.ReferenceCounted;
type
TControlStyleProperty = class(TObject)
private
FOwner: TBaseObject;
procedure NotifyOwner();
public
constructor Create(Owner: TBaseObject); virtual;
property Owner: TBaseObject read FOwner;
end;
TControlStylePropertyChanged = class(TEvent)
private
FProperty: TControlStyleProperty;
public
constructor Create(Property_: TControlStyleProperty); virtual;
function GetSender(): TObject; override;
property Property_: TControlStyleProperty read FProperty;
end;
TControlFillProperty = class(TControlStyleProperty)
private
FFill: TFill;
procedure SetFill(const Value: TFill);
public
constructor Create(Owner: TBaseObject; Initial: TFill); reintroduce; virtual;
destructor Destroy(); override;
property Fill: TFill read FFill write SetFill;
end;
TControlSize = class(TReferenceCountedObject)
public
class var
Auto: TControlSize;
Available: TControlSize;
class constructor Create();
class destructor Destroy();
end;
TControlSizeAuto = class(TControlSize);
TControlSizeAvailable = class(TControlSize);
TControlSizeFixed = class(TControlSize)
private
FValue: TInteger32;
public
constructor Create(Value: TInteger32); reintroduce; virtual;
property Value: TInteger32 read FValue;
end;
TControlSizeProperty = class(TControlStyleProperty)
private
FValue: TControlSize;
procedure SetValue(const Value: TControlSize);
public
constructor Create(Owner: TBaseObject); override;
destructor Destroy(); override;
property Value: TControlSize read FValue write SetValue;
end;
TControlStyle = class(TObject)
private
FOwner: TBaseObject;
public
var
Width: TControlSizeProperty;
Height: TControlSizeProperty;
Background: TControlFillProperty;
PanelBackground: TControlFillProperty; // TODO: Should actually be replaced by Background with a styling rule that applies to a TPanel
var
Properties: TList<TControlStyleProperty>;
constructor Create(Owner: TBaseObject); virtual;
destructor Destroy(); override;
property Owner: TBaseObject read FOwner;
end;
implementation
uses
Color.Constants,
Object_.List;
{ TControlStyle }
constructor TControlStyle.Create(Owner: TBaseObject);
begin
inherited Create();
FOwner := Owner;
Width := TControlSizeProperty.Create(Owner);
Height := TControlSizeProperty.Create(Owner);
Background := TControlFillProperty.Create(Owner, TFill.Create(TNamedColor.White));
PanelBackground := TControlFillProperty.Create(Owner, TFill.Create(TPurposeColor.Panel));
Properties := TObjectList<TControlStyleProperty>.Create();
Properties.Add(Width);
Properties.Add(Height);
Properties.Add(Background);
Properties.Add(PanelBackground);
end;
destructor TControlStyle.Destroy();
begin
Properties.Free();
inherited Destroy();
end;
{ TControlFillProperty }
constructor TControlFillProperty.Create(Owner: TBaseObject; Initial: TFill);
begin
inherited Create(Owner);
FFill := Initial;
FFill.AddReference();
end;
destructor TControlFillProperty.Destroy();
begin
Fill.ReleaseReference();
inherited Destroy();
end;
procedure TControlFillProperty.SetFill(const Value: TFill);
begin
if Value <> Fill then
begin
Value.AddReference();
Fill.ReleaseReference();
FFill := Value;
NotifyOwner();
end;
end;
{ TControlStyleProperty }
constructor TControlStyleProperty.Create(Owner: TBaseObject);
begin
inherited Create();
FOwner := Owner;
end;
procedure TControlStyleProperty.NotifyOwner();
var
Event: TControlStylePropertyChanged;
begin
Event := TControlStylePropertyChanged.Create(Self);
try
Owner.HandleEvent(Event);
finally
Event.Free();
end;
end;
{ TControlStylePropertyChanged }
constructor TControlStylePropertyChanged.Create(Property_: TControlStyleProperty);
begin
inherited Create();
FProperty := Property_;
end;
function TControlStylePropertyChanged.GetSender(): TObject;
begin
Result := Property_;
end;
{ TControlSizeProperty }
constructor TControlSizeProperty.Create(Owner: TBaseObject);
begin
inherited Create(Owner);
FValue := TControlSize.Auto;
FValue.AddReference();
end;
destructor TControlSizeProperty.Destroy();
begin
Value.ReleaseReference();
inherited Destroy();
end;
procedure TControlSizeProperty.SetValue(const Value: TControlSize);
begin
if Value <> Self.Value then
begin
Value.AddReference();
Self.Value.ReleaseReference();
FValue := Value;
NotifyOwner();
end;
end;
{ TControlSizeFixed }
constructor TControlSizeFixed.Create(Value: TInteger32);
begin
inherited Create();
FValue := Value;
end;
{ TControlSize }
class constructor TControlSize.Create();
begin
Auto := TControlSizeAuto.Create();
Auto.AddReference();
Available := TControlSizeAvailable.Create();
Available.AddReference();
end;
class destructor TControlSize.Destroy();
begin
Auto.ReleaseReference();
Available.ReleaseReference();
end;
end.
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