TPicture

type TPicture = class(TPersistent)

protected

  procedure AssignTo(); override;

AssignTo if Dest is the correct (Graphic) class type, calls Assign for Dest, otherwise calls inherited AssignTo.

  procedure Changed(); virtual;

Performs actions needed when value(s) in the class instance have been modified.

  procedure DefineProperties(); override;

Defines properties handled during LCL component streaming.

  procedure Progress(); virtual;

Monitors progress of a drawing process.

  procedure LoadFromStreamWithClass();

Loads values for the Graphic property from a stream using the specified class type.

public

  constructor Create;

Create - constructor for TPicture: performs inherited Create then loads file and clipboard formats.

  destructor Destroy; override;

Destroy - destructor for TPicture: frees graphic then performs inherited Destroy.

  procedure Clear; virtual;

Clear - removes the Graphic in the class instance.

  procedure LoadFromClipboardFormat();

LoadFromClipboardFormat - Reads the picture from the handle provided in the given clipboard format.

  procedure LoadFromClipboardFormatID();

Reads the picture from a clipboard of type ClipboardType using the format FormatID.

  procedure LoadFromFile();

LoadFromFile - Reads a picture from disk.

  procedure LoadFromResourceName();

Loads content from the specified resource into the Graphic property.

  procedure LoadFromLazarusResource();

Gets the named resource from a Lazarus Resource (.lrs) file.

  procedure LoadFromStream();

Loads a supported image format from the specified stream.

  procedure LoadFromStreamWithFileExt();

Loads the picture from a stream containing data for the specified file extension.

  procedure SaveToClipboardFormat();

SaveToClipboardFormats - Allocates a global handle and writes the picture in its native clipboard format.

  procedure SaveToFile();

SaveToFile - Writes the picture to disk.

  procedure SaveToStream();

Saves the graphic to the specified stream.

  procedure SaveToStreamWithFileExt();

Saves the graphic to a stream using the class type for the specified file extension.

  class function SupportsClipboardFormat();

SupportsClipboardFormat - Returns True if the given clipboard format is supported by LoadFromClipboardFormat.

  procedure Assign(); override;

Assign - if the Source is a valid graphic type, copy the relevant details to the current object, otherwise call inherited Assign.

  class procedure RegisterFileFormat();

Registers a new TGraphic class for use in LoadFromFile.

  class procedure RegisterClipboardFormat();

Registers a new TGraphic class for use in LoadFromClipboardFormat.

  class procedure UnregisterGraphicClass();

Removes all references to the specified TGraphic.

  class function FindGraphicClassWithFileExt();

Finds a graphic class with the named file extension Ext, and raises an exception if not found.

  property Bitmap: TBitmap; [rw]

Bitmap - Returns a bitmap.

  property Icon: TIcon; [rw]

Icon contained within the picture.

  property Jpeg: TJpegImage; [rw]

Jpeg - returns a JPEG image.

  property Pixmap: TPixmap; [rw]

Pixmap - Returns a pixmap.

  property PNG: TPortableNetworkGraphic; [rw]

PNG - Returns a png.

  property PNM: TPortableAnyMapGraphic; [rw]

PNM - a PortableAnyMapGraphic image.

  property Graphic: TGraphic; [rw]

Graphic - The TGraphic object contained by the TPicture.

  property Height: Integer; [r]

Height - The native, unstretched, height of the picture.

  property Width: Integer; [r]

Width - The native, unstretched, width of the picture.

  property OnChange: TNotifyEvent; [rw]

OnChange - Event handler for any change in the picture.

  property OnProgress: TProgressEvent; [rw]

Event handler signalled to track the progress of operations in the class instance.

end;

TPicture

Implements a container for TGraphic and descendent classes.

TPersistent,IFPObserved

TObject