systemtreeview.pas

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{$I DFS.INC}                    { Defines for all Delphi Free Stuff components }
{$I SYSTEMCONTROLPACK.INC}      { Defines specific to these components }

{ -----------------------------------------------------------------------------}
{ TdfsSystemTreeView                                                           }
{ -----------------------------------------------------------------------------}
{ A tree view control that acts as the tree in the Windows Explorer.  This is  }
{ part of the System Control Pack.                                             }
{                                                                              }
{ Copyright 2000-2001, Brad Stowers.  All Rights Reserved.                     }
{                                                                              }
{ Copyright:                                                                   }
{ All Delphi Free Stuff (hereafter "DFS") source code is copyrighted by        }
{ Bradley D. Stowers (hereafter "author"), and shall remain the exclusive      }
{ property of the author.                                                      }
{                                                                              }
{ Distribution Rights:                                                         }
{ You are granted a non-exlusive, royalty-free right to produce and distribute }
{ compiled binary files (executables, DLLs, etc.) that are built with any of   }
{ the DFS source code unless specifically stated otherwise.                    }
{ You are further granted permission to redistribute any of the DFS source     }
{ code in source code form, provided that the original archive as found on the }
{ DFS web site (http://www.delphifreestuff.com) is distributed unmodified. For }
{ example, if you create a descendant of TDFSColorButton, you must include in  }
{ the distribution package the colorbtn.zip file in the exact form that you    }
{ downloaded it from http://www.delphifreestuff.com/mine/files/colorbtn.zip.   }
{                                                                              }
{ Restrictions:                                                                }
{ Without the express written consent of the author, you may not:              }
{   * Distribute modified versions of any DFS source code by itself. You must  }
{     include the original archive as you found it at the DFS site.            }
{   * Sell or lease any portion of DFS source code. You are, of course, free   }
{     to sell any of your own original code that works with, enhances, etc.    }
{     DFS source code.                                                         }
{   * Distribute DFS source code for profit.                                   }
{                                                                              }
{ Warranty:                                                                    }
{ There is absolutely no warranty of any kind whatsoever with any of the DFS   }
{ source code (hereafter "software"). The software is provided to you "AS-IS", }
{ and all risks and losses associated with it's use are assumed by you. In no  }
{ event shall the author of the softare, Bradley D. Stowers, be held           }
{ accountable for any damages or losses that may occur from use or misuse of   }
{ the software.                                                                }
{                                                                              }
{ Support:                                                                     }
{ Support is provided via the DFS Support Forum, which is a web-based message  }
{ system.  You can find it at http://www.delphifreestuff.com/discus/           }
{ All DFS source code is provided free of charge. As such, I can not guarantee }
{ any support whatsoever. While I do try to answer all questions that I        }
{ receive, and address all problems that are reported to me, you must          }
{ understand that I simply can not guarantee that this will always be so.      }
{                                                                              }
{ Clarifications:                                                              }
{ If you need any further information, please feel free to contact me directly.}
{ This agreement can be found online at my site in the "Miscellaneous" section.}
{------------------------------------------------------------------------------}
{ The lateset version of my components are always available on the web at:     }
{   http://www.delphifreestuff.com/                                            }
{ See SCP.txt for notes, known issues, and revision history.                   }
{ -----------------------------------------------------------------------------}
{ Date last modified:  June 28, 2001                                           }
{ -----------------------------------------------------------------------------}

unit SystemTreeView;

interface

{$IFNDEF DFS_SCP_SYSTREEVIEW}
  Error, should not be compiing this unit!
{$ENDIF}


{$R ErrorMsgs.r32}

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  {$IFDEF DFS_COMPILER_3_UP} ShlObj, ActiveX, {$ELSE} MyShlObj, OLE2, {$ENDIF}
  {$IFDEF DFS_STV_FILECHANGES} FileChange, {$ENDIF}
  {$IFDEF DFS_DEBUG} MMSystem, {$ENDIF}
  SystemControlPack,
  PidlHelp, ItemProp, Menus, ComCtrls, StdCtrls, CommCtrl, _Res__IDs;

const
  DFS_COMPONENT_TREE_VERSION = 'TdfsSystemTreeView ' + DFS_SCP_VERSION;

{$IFDEF DFS_DELPHI}
{$IFNDEF DFS_DELPHI_4_UP}
const
  TVS_CHECKBOXES          = $0100;
{$ENDIF}
{$ELSE}
{$IFDEF DFS_CPPB_1}
const
  TVS_CHECKBOXES          = $0100;
{$ENDIF}
{$ENDIF}

type
  // If you change the order of these, you have to change the order of the
  // FOLDERID constants below in GetFolderID function.
  TRootFolder = (rfDesktop, rfRecycleBin, rfControlPanel, rfDesktopDir,
     rfDrives, rfFavoriteURLs, rfFonts, rfNetHood, rfNetHoodDir, rfDocumentDir,
     rfPrinters, rfPrograms, rfRecentDir, rfSendTo, rfStartMenu, rfStartup,
     rfTemplates, rfFileSystem, rfCustom);


  TdfsSystemTreeView = class(TdfsCustomSystemTreeView)
  private
    FDesktopFolder: IShellFolder;
    FLastSelection: string;
    FRecreatingWnd: boolean;
    FShowErrorsInMsgBox: boolean;
    FAutoscroll: boolean;
    FRootFolder: TRootFolder;
    FShowHiddenDirs: boolean;
    FExpandRoot: boolean;
    FCheckboxes: boolean;
    FCustomDir: string;
    FCustomDirCaption: string;
    FShowFiles: boolean;
    FPopupMenuMethod: TPopupMenuMethod;
    FTreeHandle: HWND;
    {$IFDEF DFS_STV_FILECHANGES}
    ParentThread: TFileChangeThread;
    ParentWatchedNode: TTreeNode;
    FCThread: TFileChangeThread;
    WatchedNode: TTreeNode;
    {$ENDIF}
    FFileMask: string;
    FFileMaskList: TStringList;
    FOnPopulated: TTVExpandedEvent;
    FDestroyingSelf: boolean;

    procedure RestoreChecks;
    procedure SaveChecks;
    function GetIDFromPath(const ShellFolder: IShellFolder; const APath: string;
       var ID: PItemIDList): boolean;
    function GetFolderID: integer;
    function EnumerateFolders(const ShellFolder: IShellFolder;
       const ParentNode: TTreeNode): boolean;
    function AddItemData(ItemFolder: IShellFolder; aIDList,
       aFQ_IDList: PItemIDList; Attrs: UINT): TFolderItemData;
    procedure FreeItemData(Item: TTreeNode);
    procedure FreeAllItemData;
    function GetSelection: string;
    procedure SetSelection(const ASel: string);
    function GetItemCheck(Node: TTreeNode): boolean;
    procedure SetItemCheck(Node: TTreeNode; Val: boolean);
    {$IFDEF DFS_COMPILER_5_UP}
    procedure WMContextMenu(var Message: TWMContextMenu); message WM_CONTEXTMENU;
    {$ELSE}
    procedure WMRButtonUp(var Message: TWMRButtonUp); message WM_RBUTTONUP;
    {$ENDIF}
    procedure CNNotify(var Message: TWMNotify); message CN_NOTIFY;
  protected
    procedure TimerEvent; override;
    { Base Class Abstract Implementations }
    // Implementation must return the actual ID list.  Caller will make a copy
    // of it it wants it's own.  Implementer owns this one, i.e. it's the "real
    // thing".  If there isn't one, return NIL.
    function GetSelectionPIDL: PItemIDList; override;
    function GetSelectionParentFolder: IShellFolder; override;
    // Implementation notes: IDList parameter belongs to someone else.  If
    // needed by this component, a copy must be made of it.  This differs from
    // the Reset method in that it does not notify linked controls of a change
    // because that could result in an endless cycle of notifications. Return
    // value indicates success or failure.
    function LinkedReset(const ParentFolder: IShellFolder;
       const IDList: PItemIDList; ForceUpdate: boolean): boolean; override;

    procedure CreateParams(var Params: TCreateParams); override;
    procedure CreateWnd; override;
    procedure DestroyWnd; override;
    procedure Loaded; override;
    function CanExpand(Node: TTreeNode): boolean; override;
    function CanEdit(Node: TTreeNode): boolean; override;
    procedure Edit(const Item: TTVItem); override;
    procedure Change(Node: TTreeNode); override;
    procedure DoStartDrag(var DragObject: TDragObject); override;
    function GetPopupMenu: TPopupMenu; override;
    procedure MouseMove(Shift: TShiftState; X, Y: Integer); override;
    procedure Compute_TreeMoves(X, Y: integer); dynamic;
    procedure Populated(Node: TTreeNode); dynamic;

    // Helpers
      // Why isn't there one of these in TTreeView????
    procedure DeleteItem(Node: TTreeNode); dynamic;
    function GetNodeFromItem(const Item: TTVItem): TTreeNode;
    function FindNodeFromID(AnID: PItemIDList): TTreeNode;

    // event for this?
    function AddNode(const ShellFolder: IShellFolder;
       FQ_IDList, IDList: PItemIDList; const ParentNode: TTreeNode): TTreeNode;
       dynamic;

    // Property methods.
    procedure SetRootFolder(Val: TRootFolder);
    procedure SetCustomDir(const Val: string);
    procedure SetCustomDirCaption(const Val: string);
    procedure SetShowFiles(Val: boolean);
    function GetVersion: string;
    procedure SetVersion(const Val: string);
    function GetItems: TTreeNodes;
    procedure SetCheckboxes(Val: boolean);
    procedure SetFileMask(const Val: string);

    // These two do the same thing, just take different parameters.
    function GetItemData(Index: integer): TFolderItemData;
    function GetNodeData(Node: TTreeNode): TFolderItemData;
    procedure Expand(Node: TTreeNode); override;
    function CustomSort(SortProc: TTVCompare; Data: Longint): Boolean; dynamic;
    function AlphaSort: Boolean;
    procedure DblClick; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure Reset; override;
    function DisplayContextMenu(Node: TTreeNode; Where: TPoint): boolean;
       dynamic;
    procedure ResetNode(const Node: TTreeNode);
    function GetNodePath(const Node: TTreeNode): string;
    {$IFDEF DFS_SCP_SYSCOMBOBOX}
    procedure ComboBoxSetSelectionPIDL(APIDL: PItemIDList);
    {$ENDIF}

    // Useful functions for applications.  These modify permanently, not just
    // the node.  i.e. if you rename 'My Computer' to 'Crasher', it is renamed
    // system wide, not just in your app.  If you delete the 'C:\WINDOWS'
    // folder, you are in deep trouble and I deny any responsibility.
    function RenameNode(const Node: TTreeNode; const NewName: string): boolean;
    function DeleteNode(const Node: TTreeNode): boolean;
    function AddNewNode(const ParentNode: TTreeNode; const NodeName: string;
       SelectNewNode: boolean): boolean;
    // Move up one directory, i.e. "cd .."
    procedure ChangeToParent;

    {$IFDEF DFS_STV_FILECHANGES}
    procedure WatchDirectoryForChanges(const ANode: TTreeNode);
    procedure ParentThreadDone(Sender: TObject);
    procedure ThreadDone(Sender: TObject);
    {$ENDIF}
    property ShowErrorsInMsgBox: boolean
       read FShowErrorsInMsgBox write FShowErrorsInMsgBox default TRUE;
    property Items
       read GetItems;
    property ItemChecked[Node: TTreeNode]: boolean
       read GetItemCheck write SetItemCheck;
    property NodeData[Node: TTreeNode]: TFolderItemData
       read GetNodeData;
  published
    {$IFDEF DFS_SCP_SYSLISTVIEW}
    property ListView;
    {$ENDIF}
    {$IFDEF DFS_SCP_SYSCOMBOBOX}
    property ComboBox;
    {$ENDIF}
    property ReadDelay;


    property Version: string
       read GetVersion
       write SetVersion
       stored FALSE;
    property PopupMenuMethod: TPopupMenuMethod
       read FPopupMenuMethod
       write FPopupMenuMethod
       default pmmContext;
    property Selection: string
       read GetSelection write SetSelection;
    property Directory: string
       read GetSelection write SetSelection stored FALSE;
    property RootFolder: TRootFolder
       read FRootFolder write SetRootFolder default rfDesktop;
    property CustomDir: string
       read FCustomDir write SetCustomDir;
    property CustomDirCaption: string
       read FCustomDirCaption write SetCustomDirCaption;
    property ShowFiles: boolean
       read FShowFiles write SetShowFiles default FALSE;
    property ShowHiddenDirs: boolean
       read FShowHiddenDirs write FShowHiddenDirs default TRUE;
    property ExpandRoot: boolean
       read FExpandRoot write FExpandRoot default TRUE;
    property Checkboxes: boolean
       read FCheckboxes write SetCheckboxes default FALSE;
    property Autoscroll: boolean
       read FAutoscroll write FAutoscroll default FALSE;
    property FileMask: string
       read FFileMask write SetFileMask;

    property OnPopulated: TTVExpandedEvent
       read FOnPopulated write FOnPopulated;


    { Publish protected properties. }
    property Align;
    {$IFDEF DFS_COMPILER_4_UP}
    property Anchors;
    property AutoExpand;
    property BiDiMode;
    {$ENDIF}
    property BorderStyle;
    {$IFDEF DFS_COMPILER_4_UP}
    property BorderWidth;
    property ChangeDelay;
    {$ENDIF}
    property Color;
    {$IFDEF DFS_COMPILER_4_UP}
    property Constraints;
    {$ENDIF}
    property Ctl3D;
    property DragCursor;
    {$IFDEF DFS_COMPILER_4_UP}
    property DragKind;
    {$ENDIF}
    property DragMode;
    property Enabled;
    property Font;
    property HideSelection;
    {$IFDEF DFS_COMPILER_4_UP}
    property HotTrack;
    {$ENDIF}
    property Indent;
    property OnChange;
    property OnChanging;
    property OnClick;
    property OnCollapsed;
    property OnCollapsing;
    property OnCompare;
    {$IFDEF DFS_COMPILER_4_UP}
    property OnCustomDraw;
    property OnCustomDrawItem;
    {$ENDIF}
    property OnDblClick;
    property OnDeletion;
    property OnDragDrop;
    property OnDragOver;
    property OnEdited;
    property OnEditing;
    {$IFDEF DFS_COMPILER_4_UP}
    property OnEndDock;
    {$ENDIF}
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnExpanded;
    property OnExpanding;
    property OnGetImageIndex;
    property OnGetSelectedIndex;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    {$IFDEF DFS_COMPILER_4_UP}
    property OnStartDock;
    {$ENDIF}
    property OnStartDrag;
    {$IFDEF DFS_COMPILER_4_UP}
    property ParentBiDiMode;
    {$ENDIF}
    {$IFDEF DFS_COMPILER_2}
    property ParentColor;
    {$ELSE}
    property ParentColor default FALSE;
    {$ENDIF}
    property ParentCtl3D;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ReadOnly;
    {$IFDEF DFS_COMPILER_3_UP}
    property RightClickSelect;
    {$ENDIF}
    {$IFDEF DFS_COMPILER_4_UP}
    property RowSelect;
    {$ENDIF}
    property ShowButtons;
    property ShowHint;
    property ShowLines;
    property ShowRoot default TRUE;
    property TabOrder;
    property TabStop default True;
    {$IFDEF DFS_COMPILER_4_UP}
    property ToolTips;
    {$ENDIF}
    property Visible;
  end;


{$IFDEF DFS_COMPILER_2}
const
  SHGDFIL_FINDDATA            = 1;
  SHGDFIL_NETRESOURCE         = 2;
  SHGDFIL_DESCRIPTIONID       = 3;

function SHGetDataFromIDList(psf: IShellFolder; pidl: PItemIDList;
  nFormat: Integer; ptr: Pointer; cb: Integer): HResult; stdcall;
{$ENDIF}

implementation