Копирование и вставка данных своего формата из буфера обмена

// The TClipboard provides easy clipboard access. But what if you 
// want to add (several) custom defined items to the clipboard? 
 
// For all actions is the unit Clipboard required. 
uses Clipboard;
 
 // First you have to register your own ClipBoard format 
// Zuerst registrieren wir unser eigenes ClipBoard Format 
const
   MyClipboardFormatStr = 'MyData';
 
 var
   MyClpFormat: integer;
 
   MyClpFormat := RegisterClipboardFormat(MyClipboardFormatStr);
 
 { The variable SLMClpFormat will contain a unique format handle for 
  your own clipboard format. 
 
  Die Variable SLMClpFormat enthalt ein einzigartiges Format Handle 
  fur unser ClipBoard Format. 
}
 
 procedure IncPointer(var p: Pointer; increment: Integer);
 begin
   p := PChar(p) + Increment;
 end;
 
 // Say you have a data record defined as: 
// Definiere zuerst etwa einen solchen Daten Record: 
type
   PMyDataRec = ^TMyDataRec;
   TMyDataRec = record
     Name: string[50];
     Value: Integer;
   end;
 
 { Furthermore let's say the data records are stored in a Listbox 
  and shall be copied to a list box. 
 
  Angenommen, die Daten Records sind in einer ListBox gespeichert und 
  sollen in eine ListBox kopiert werden. 
}
 
   // Copy like this: 
procedure TForm1.CopyItems;
 var
   i: integer;
   dh: THandle;
   ic: integer;
   p: Pointer;
   pi: pInteger;
 begin
   // get number of items to be copied 
  // Die Anzahl zu kopierenden Items 
  ic := List1.SelCount;
   dh := GlobalAlloc(GMEM_FIXED or GMEM_ZEROINIT,
     (SizeOf(TMyDataRec) * ic) + SizeOf(Integer));
   { allocate memory for all items plus for a integer variable giving you the number of 
    copied items }
   p   := GlobalLock(dh);    { Lock the allocated memory }
   pi  := pInteger(p);
   pi^ := ic;              { write number of items to allocated memory }
   IncPointer(p, SizeOf(Integer)); { increment the pointer behind the written data }
   // You don't have to create an instance of clipboard, this is done automatically 
 
  for i := 1 to List1.Items.Count do { check all items if they are selected }
   begin
     if List1.Items[i - 1].Selected then
     begin
       { This one is selected -> copy it o the clipboard }
       PMyDataRec(p)^ := PMyDataRec(List1.Items[i - 1].Data)^;
       { of course data must point to a TMyDataRec }
       IncPointer(p, SizeOf(TMyDataRec));
       { increment the pointer behind the written data }
     end;
   end;
 
   // You have now filled the allocated memory with all items that shall be copied. 
  // Now you can put them to the clipboard 
  Clipboard.Open;  { Open the clipboard will prevent overwriting of so far copied items }
   Clipboard.Clear; { Clear the clipboard first }
   Clipboard.SetAsHandle(MyClpFormat, Dh);  { Copy to clipboard }
   Clipboard.Close;  { finally close the clipboard }
   GlobalUnlock(dh);
   { and unlock the allocate memory. But don't free it, it will be used by the clipboard }
 
   if ic = 0 then
     GlobalFree(dh);    { You can free it if you haven't copied anything }
 end;
 
 // Check first if your items are still available before pasting them from the clipbard 
 
if Clipboard.HasFormat(MyClpFormat) then
 begin
   Form1.Paste1.Enabled := True;   { Yes, they are still available }
 end;
 
 // And this is, how you paste them after Paste1 is clicked 
procedure TMDIForm.Paste1Click(Sender: TObject);
 var
   dh: THandle;
   pdr: PSLMDataRec;
   i, ic: integer;
   p: Pointer;
   pi: pInteger;
   li: TListItem;
 begin
   if Clipboard.HasFormat(MyClpFormat) then
   // We have already checked, but maybe another application has overwritten the 
  // clipboard in between.... 
  begin
     ClipBoard.Open;       { First open the clipboard again }
     dh := Clipboard.GetAsHandle(MyClpFormat); { Catch the handle to the stored items }
     p  := GlobalLock(dh);  { and lock it }
     pi := pInteger(p);    { The first item is an integer giving the number of items }
     ic := pi^;            { so get the number of items }
     IncPointer(p, SizeOf(Integer)); { increment the pointer behind the read data }
     for i := 1 to ic do   { get all copied items one after another }
     begin
       li   := List1.Items.Add;  { first create a new listbox item }
       pdr  := New(PMyDataRec); { Then create a new pointer to a TMyDataRec }
       pdr^ := PMyDataRec(p)^; { and fill it with data from the clipboard }
       IncPointer(p, SizeOf(TSLMDataRec));
       { increment the pointer behind the written data }
 
       li.Data    := pdr;  { Set the data pointer of the list item to the new record }
       LI.Caption := pdr^.Name;  { Let the item display the record field "Name" }
 
       // You can of course add more record fields if the item has subitems: 
      LI.SubItems.Add(IntToStr(Value));
     end;    { All data retrieved from clipboard }
     Clipboard.Close;  { Close it }
     GlobalUnlock(dh);
    { and unlock the pointer, but don't free it. This will be done by the clipboard itself, 
     if necessary }
   end;
 end;

Взято с сайта: https://www.swissdelphicenter.ch

{
Copyright © 1999 by Delphi 5 Developer's Guide - Xavier Pacheco and Steve Teixeira
}
unit cbdata;
interface
uses
  SysUtils, Windows, clipbrd;
 
const
 
  DDGData = 'CF_DDG'; // constant for registering the clipboard format.
type
 
  // Record data to be stored to the clipboard
 
  TDataRec = packed record
    LName: string[10];
    FName: string[10];
    MI: string[2];
    Age: Integer;
    BirthDate: TDateTime;
  end;
 
  { Define an object around the TDataRec that contains the methods
    for copying and pasting the data to and from the clipboard }
  TData = class
  public
    Rec: TDataRec;
    procedure CopyToClipBoard;
    procedure GetFromClipBoard;
  end;
 
var
  CF_DDGDATA: word; // Receives the return value of RegisterClipboardFormat().
 
implementation
 
procedure TData.CopyToClipBoard;
{ This function copies the contents of the TDataRec field, Rec, to the
  clipboard as both binary data, as text. Both formats will be
  available from the clipboard }
const
  CRLF = #13#10;
var
Data: THandle;
  DataPtr: Pointer;
  TempStr: string[50];
begin
  // Allocate SizeOf(TDataRec) bytes from the heap
  Data := GlobalAlloc(GMEM_MOVEABLE, SizeOf(TDataRec));
  try
    // Obtain a pointer to the first byte of the allocated memory
    DataPtr := GlobalLock(Data);
    try
      // Move the data in Rec to the memory block
      Move(Rec, DataPtr^, SizeOf(TDataRec));
      { Clipboard.Open must be called if multiple clipboard formats are
        being copied to the clipboard at once. Otherwise, if only one
        format is being copied the call isn't necessary }
      ClipBoard.Open;
      try
        // First copy the data as its custom format
        ClipBoard.SetAsHandle(CF_DDGDATA, Data);
        // Now copy the data as text format
        with Rec do
          TempStr := FName + CRLF + LName + CRLF + MI + CRLF + IntToStr(Age) +
            CRLF +
            DateTimeToStr(BirthDate);
        ClipBoard.AsText := TempStr;
        { If a call to Clipboard.Open is made you must match it
          with a call to Clipboard.Close }
      finally
        Clipboard.Close
      end;
    finally
      // Unlock the globally allocated memory
      GlobalUnlock(Data);
    end;
  except
    { A call to GlobalFree is required only if an exception occurs.
      Otherwise, the clipboard takes over managing any allocated
      memory to it.}
    GlobalFree(Data);
    raise;
  end;
end;
 
procedure TData.GetFromClipBoard;
{ This method pastes memory saved in the clipboard if it is of the
  format CF_DDGDATA. This data is stored in the TDataRec field of
  this object. }
var
  Data: THandle;
  DataPtr: Pointer;
  Size: Integer;
begin
  // Obtain a handle to the clipboard
  Data := ClipBoard.GetAsHandle(CF_DDGDATA);
  if Data = 0 then
    Exit;
  // Obtain a pointer to the memory block referred to by Data
  DataPtr := GlobalLock(Data);
  try
    // Obtain the size of the data to retrieve
    if SizeOf(TDataRec) > GlobalSize(Data) then
      Size := GlobalSize(Data)
    else
      Size := SizeOf(TDataRec);
    // Copy the data to the TDataRec field
    Move(DataPtr^, Rec, Size)
  finally
    // Free the pointer to the memory block.
    GlobalUnlock(Data);
  end;
end;
 
initialization
  // Register the custom clipboard format
  CF_DDGDATA := RegisterClipBoardFormat(DDGData);
end.

{
Copyright © 1999 by Delphi 5 Developer's Guide - Xavier Pacheco and Steve Teixeira
}
 
unit MainFrm;
 
interface
 
uses
  SysUtils, WinTypes, WinProcs, Messages, Classes, Graphics, Controls,
  Forms, Dialogs, StdCtrls, clipbrd, Mask, ComCtrls;
type
 
  TMainForm = class(TForm)
    edtFirstName: TEdit;
    edtLastName: TEdit;
    edtMI: TEdit;
    btnCopy: TButton;
    btnPaste: TButton;
    meAge: TMaskEdit;
    btnClear: TButton;
    lblFirstName: TLabel;
    lblLastName: TLabel;
    lblMI: TLabel;
    lblAge: TLabel;
    lblBirthDate: TLabel;
    memAsText: TMemo;
    lblCustom: TLabel;
    lblText: TLabel;
    dtpBirthDate: TDateTimePicker;
    procedure btnCopyClick(Sender: TObject);
    procedure btnPasteClick(Sender: TObject);
    procedure btnClearClick(Sender: TObject);
  end;
 
var
  MainForm: TMainForm;
 
implementation
uses cbdata;
 
{$R *.DFM}
 
procedure TMainForm.btnCopyClick(Sender: TObject);
// This method copies the data in the form's controls onto the clipboard
var
  DataObj: TData;
begin
  DataObj := TData.Create;
  try
    with DataObj.Rec do
    begin
      FName := edtFirstName.Text;
      LName := edtLastName.Text;
      MI := edtMI.Text;
      Age := StrToInt(meAge.Text);
      BirthDate := dtpBirthDate.Date;
      DataObj.CopyToClipBoard;
    end;
  finally
    DataObj.Free;
  end;
end;
 
procedure TMainForm.btnPasteClick(Sender: TObject);
{ This method pastes CF_DDGDATA formatted data from the clipboard to
  the form's controls. The text version of this data is copied to the
  form's TMemo component. }
var
  DataObj: TData;
begin
  btnClearClick(nil);
  DataObj := TData.Create;
  try
    // Check if the CF_DDGDATA format is available
    if ClipBoard.HasFormat(CF_DDGDATA) then
      // Copy the CF_DDGDATA formatted data to the form's controls
      with DataObj.Rec do
      begin
        DataObj.GetFromClipBoard;
        edtFirstName.Text := FName;
        edtLastName.Text := LName;
        edtMI.Text := MI;
        meAge.Text := IntToStr(Age);
        dtpBirthDate.Date := BirthDate;
      end;
  finally
    DataObj.Free;
  end;
  // Now copy the text version of the data to form's TMemo component.
  if ClipBoard.HasFormat(CF_TEXT) then
    memAsText.PasteFromClipBoard;
end;
 
procedure TMainForm.btnClearClick(Sender: TObject);
var
  i: integer;
begin
  // Clear the contents of all controls on the form
  for i := 0 to ComponentCount - 1 do
    if Components[i] is TCustomEdit then
      TCustomEdit(Components[i]).Text := '';
end;
 
end.