Class TGraphic

Fields

Unit

Declaration

type TGraphic = class(TPersistent)

Description

A class containing any element that can be drawn within rectangular bounds

Hierarchy

TGraphic

Overview

Methods

	`constructor Create; virtual;`
	`class function GetFileExtensions: string; virtual;`
	`function GetEmpty: Boolean; virtual; abstract;`
	`function GetHeight: Integer; virtual; abstract;`
	`function GetMimeType: string; virtual;`
	`function GetTransparent: Boolean; virtual; abstract;`
	`function GetWidth: Integer; virtual; abstract;`
	`procedure Clear; virtual;`
	`procedure LoadFromFile(const Filename: string); virtual;`
	`procedure LoadFromStream(Stream: TStream); virtual; abstract;`
	`procedure SaveToFile(const Filename: string); virtual;`
	`procedure SaveToStream(Stream: TStream); virtual; abstract;`
	`procedure Changed(Sender: TObject); virtual;`
	`procedure Draw(ACanvas: TCanvas; const Rect: TRect); virtual; abstract;`
	`procedure SetHeight(Value: Integer); virtual; abstract;`
	`procedure SetTransparent(Value: Boolean); virtual; abstract;`
	`procedure SetWidth(Value: Integer); virtual; abstract;`

Properties

	`property Empty: Boolean read GetEmpty;`
	`property Height: Integer read GetHeight write SetHeight;`
	`property Transparent: Boolean read GetTransparent write SetTransparent;`
	`property Width: Integer read GetWidth write SetWidth;`

Description

Methods

	`constructor Create; virtual;`
`Create` an empty instance

	`class function GetFileExtensions: string; virtual;`
Returns the list of possible file extensions

	`function GetEmpty: Boolean; virtual; abstract;`
Check whether it is empty

	`function GetHeight: Integer; virtual; abstract;`
Retrieves height

	`function GetMimeType: string; virtual;`
Get mimetype of current graphic class

	`function GetTransparent: Boolean; virtual; abstract;`
Retrieves whether transparent

	`function GetWidth: Integer; virtual; abstract;`
Retrieves width

	`procedure Clear; virtual;`
Clears the content

	`procedure LoadFromFile(const Filename: string); virtual;`
Load the content from a given file

	`procedure LoadFromStream(Stream: TStream); virtual; abstract;`
Load the content from a given stream

	`procedure SaveToFile(const Filename: string); virtual;`
Saves the content to a file

	`procedure SaveToStream(Stream: TStream); virtual; abstract;`
Saves the content into a given stream

	`procedure Changed(Sender: TObject); virtual;`
Notify a change

	`procedure Draw(ACanvas: TCanvas; const Rect: TRect); virtual; abstract;`
`Draw` the content onto a canvas

	`procedure SetHeight(Value: Integer); virtual; abstract;`
Sets the height

	`procedure SetTransparent(Value: Boolean); virtual; abstract;`
Sets whether to render as transparent

	`procedure SetWidth(Value: Integer); virtual; abstract;`
Sets the widith

Properties

	`property Empty: Boolean read GetEmpty;`
Returns if the content is completely `empty`

	`property Height: Integer read GetHeight write SetHeight;`
Returns the `height` of the bounding rectangle

	`property Transparent: Boolean read GetTransparent write SetTransparent;`
Gets or sets if it is drawn with transparency

	`property Width: Integer read GetWidth write SetWidth;`
Returns the `width` of the bounding rectangle