[Overview][Classes][Index] Reference for unit 'groupresource' (#fcl-res)

TGroupResource

[Properties (by Name)] [Methods (by Name)] [Events (by Name)]

Abstract common class for group icon and group cursor classes

Declaration

Source position: groupresource.pp line 29

type TGroupResource = class(TAbstractResource)

protected

  fType: TResourceDesc;

  fName: TResourceDesc;

  fItemData: TStream;

  fItemList: TFPList;

  dummyType: TResourceDesc;

  dummyName: TResourceDesc;

  procedure FindSubResources;

  procedure ReadResourceItemHeader; virtual; abstract;

  procedure CheckBuildItemStream;

  function GetItemData;

  procedure WriteHeader(); virtual; abstract;

  function WriteResHeader;

  procedure CreateSubItems;

  procedure CreateSubItem; virtual; abstract;

  procedure UpdateItemOwner(); virtual; abstract;

  procedure ClearItemList; virtual; abstract;

  procedure DeleteSubItems; virtual; abstract;

  function GetSubStreamCount;

  function GetSubStream(); virtual; abstract;

  procedure SetOwnerList(); override;

  procedure NotifyResourcesLoaded; override;

public

  destructor Destroy; override;

  

  function CompareContents(); override;

  procedure SetCustomItemDataStream();

  

Sets a custom stream as the underlying stream for ItemData

  procedure UpdateRawData; override;

  property ItemData: TStream; [r]

  

Resource data as an ICO/CUR stream

end;

Inheritance

TGroupResource

  

Abstract common class for group icon and group cursor classes

|

TAbstractResource

  

Base abstract resource class

|

TObject

Description

This class provides common functionalities that are extended by TGroupIconResource and TGroupCursorResource.

Resources of type RT_GROUP_ICON and RT_GROUP_CURSOR represent a .ico or .cur file, respectively. However, data isn't contained in a single resource, but it's scattered over several different resources. That is, a .ico file contains an icon, which is made of several different images (for different sizes and color depth); when it is represented as a resource, however, the RT_GROUP_ICON resource only contains information about the single images, which are contained each in a different resource of type RT_ICON. The single resources are pretty unuseful alone, since they only consist of raw image data: they must be accessed in the contest of the RT_GROUP_ICON resource, which provides information about them.

TGroupIconResource and TGroupCursorResource provide a way to handle resources of these types as if they were .ico or .cur files. This class implements common functionalities, since icons and cursors are very similar.

Remark: An object of this class should never be directly instantiated: use a descendant class instead.

See also

TGroupIconResource

  

Group icon resource type

TGroupCursorResource

  

Group cursor resource type


Documentation generated on: May 14 2021