{*******************************************************}
{                                                       }
{       Delphi VCL Extensions (RX)                      }
{                                                       }
{       Copyright (c) 1997 Master-Bank                  }
{                                                       }
{*******************************************************}

unit IcoLEdit;

{$I RX.INC}

interface

uses {$IFDEF WIN32} Windows, {$ELSE} WinTypes, WinProcs, {$ENDIF}
  Messages, Classes, Graphics, Forms, Controls, Dialogs, Buttons, IcoList,
  RTLConsts, DesignIntf, DesignEditors, VCLEditors, StdCtrls, ExtCtrls, Placemnt, {$IFDEF RX_D3} ExtDlgs, {$ELSE}
  ImagPrvw, {$ENDIF} Menus, SpeedBar;

type

{ TIconListDialog }

  TIconListDialog = class(TForm)
    OK: TButton;
    Cancel: TButton;
    Holder: TPanel;
    Slot0: TPanel;
    Slot1: TPanel;
    Slot2: TPanel;
    Slot3: TPanel;
    Slot4: TPanel;
    Image0: TImage;
    Image1: TImage;
    Image2: TImage;
    Image3: TImage;
    Image4: TImage;
    Bevel1: TBevel;
    Label1: TLabel;
    CntLabel: TLabel;
    Label3: TLabel;
    IdxLabel: TLabel;
    SpeedBar: TSpeedBar;
    Load: TSpeedItem;
    LoadAni: TSpeedItem;
    Delete: TSpeedItem;
    Clear: TSpeedItem;
    Copy: TSpeedItem;
    Paste: TSpeedItem;
    ScrollBar: TScrollBar;
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure LoadClick(Sender: TObject);
    procedure ClearClick(Sender: TObject);
    procedure CopyClick(Sender: TObject);
    procedure PasteClick(Sender: TObject);
    procedure UpdateClipboard(Sender: TObject);
    procedure ScrollBarChange(Sender: TObject);
    procedure DeleteClick(Sender: TObject);
    procedure ImageMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure LoadAniClick(Sender: TObject);
  private
    Icons: TIconList;
    FTopIndex, FSelected: Integer;
{$IFDEF RX_D3}
    FileDialog: TOpenPictureDialog;
{$ELSE}
    FileDialog: TOpenDialog;
{$ENDIF}
    procedure SetSelectedIndex(Index: Integer; Force: Boolean);
    procedure ListChanged(Sender: TObject);
    function GetSelectedIcon: TIcon;
    procedure CheckButtons;
    procedure ValidateImage;
    procedure CheckEnablePaste;
    procedure LoadAniFile;
    procedure WMActivate(var Msg: TWMActivate); message WM_ACTIVATE;
  public
    Modified: Boolean;
  end;

{ TIconListProperty }

  TIconListProperty = class(TClassProperty)
  public
    procedure Edit; override;
    function GetAttributes: TPropertyAttributes; override;
    function GetValue: string; override;
    procedure SetValue(const Value: string); override;
  end;

procedure EditIconList(IconList: TIconList);

implementation

uses TypInfo, SysUtils, Clipbrd, Consts, ClipIcon, VCLUtils, AppUtils,
  RxConst, RxLConst, MaxMin, AniFile;

{$B-}
{$IFDEF WIN32}
 {$D-}
{$ENDIF}

{$R *.DFM}

const
  sSlot = 'Slot%d';
  sImage = 'Image%d';

procedure EditIconList(IconList: TIconList);
begin
  with TIconListDialog.Create(Application) do
  try
    Icons.Assign(IconList);
    Modified := False;
    if (ShowModal = mrOk) and Modified then
      IconList.Assign(Icons);
  finally
    Free;
  end;
end;

{ TIconListProperty }

procedure TIconListProperty.Edit;
var
  Editor: TIconListDialog;
  Comp: TPersistent;
  CurDir: string;
  Res: Integer;
begin
  Editor := TIconListDialog.Create(nil);
  try
    Comp := GetComponent(0);
    if Comp is TComponent then
      Editor.Caption := TComponent(Comp).Name + '.' + GetName;
    Editor.Icons.Assign(TIconList(Pointer(GetOrdValue)));
    Editor.Modified := False;
    CurDir := GetCurrentDir;
    try
      Res := Editor.ShowModal;
    finally
      SetCurrentDir(CurDir);
    end;
    if (Res = mrOk) and Editor.Modified then begin
      TIconList(Pointer(GetOrdValue)).Assign(Editor.Icons);
      Designer.Modified;
    end;
  finally
    Editor.Free;
  end;
end;

function TIconListProperty.GetAttributes: TPropertyAttributes;
begin
  Result := [paDialog];
end;

function TIconListProperty.GetValue: string;
var
  List: TIconList;
begin
  List := TIconList(Pointer(GetOrdValue));
  if (List = nil) or (List.Count = 0) then
    Result := ResStr(srNone)
  else Result := '(' + List.ClassName + ')';
end;

procedure TIconListProperty.SetValue(const Value: string);
begin
  if Value = '' then SetOrdValue(0);
end;

{ TIconListDialog }

procedure TIconListDialog.LoadAniFile;
var
  Dialog: TOpenDialog;
  AniCursor: TAnimatedCursorImage;
begin
  Dialog := TOpenDialog.Create(Application);
  try
    with Dialog do begin
      Options := [ofHideReadOnly, ofFileMustExist];
      DefaultExt := 'ani';
      Filter := LoadStr(srAniCurFilter);
      if Execute then begin
        AniCursor := TAnimatedCursorImage.Create;
        try
          AniCursor.LoadFromFile(FileName);
          Icons.Assign(AniCursor);
        finally
          AniCursor.Free;
        end;
      end;
    end;
  finally
    Dialog.Free;
  end;
end;

function TIconListDialog.GetSelectedIcon: TIcon;
begin
  Result := nil;
  if (Icons.Count > 0) and (FSelected < Icons.Count) then
    Result := Icons[FSelected];
end;

procedure TIconListDialog.CheckEnablePaste;
begin
  Paste.Enabled := Clipboard.HasFormat(CF_ICON);
end;

procedure TIconListDialog.SetSelectedIndex(Index: Integer; Force: Boolean);
begin
  if Force or (Index <> FSelected) then begin
    Index := Min(Icons.Count, Max(Index, 0));
    while (FTopIndex < Index - 4) do Inc(FTopIndex);
    if Index < FTopIndex then FTopIndex := Index;
    FSelected := Index;
    if FSelected <> ScrollBar.Position then ScrollBar.Position := FSelected;
    ValidateImage;
  end;
end;

procedure TIconListDialog.ListChanged(Sender: TObject);
begin
  ScrollBar.Max := Icons.Count;
  SetSelectedIndex(FSelected, True);
  Modified := True;
end;

procedure TIconListDialog.CheckButtons;
var
  Enable: Boolean;
begin
  Enable := (Icons.Count > 0) and (FSelected < Icons.Count) and
    (FSelected >= 0);
  Clear.Enabled := Icons.Count > 0;
  Delete.Enabled := Enable;
  Copy.Enabled := Enable;
  CheckEnablePaste;
end;

procedure TIconListDialog.ValidateImage;
var
  Enable: Boolean;
  I: Integer;
  Image, Slot: TComponent;
begin
  for I := 0 to 4 do begin
    Image := FindComponent(Format(sImage, [I]));
    Slot := FindComponent(Format(sSlot, [I]));
    if Image <> nil then
      with TImage(Image).Picture do begin
        if FTopIndex + I < Icons.Count then Assign(Icons[FTopIndex + I])
        else Assign(nil);
{$IFDEF RX_D3}
        TImage(Image).Transparent := True;
{$ENDIF}
      end;
    if Slot <> nil then TPanel(Slot).ParentColor := True;
  end;
  Slot := FindComponent(Format(sSlot, [FSelected - FTopIndex]));
  if Slot <> nil then TPanel(Slot).Color := clActiveCaption;
  CntLabel.Caption := IntToStr(Icons.Count);
  Enable := (Icons.Count > 0) and (FSelected <= Icons.Count) and
    (FSelected >= 0);
  if Enable then IdxLabel.Caption := IntToStr(FSelected)
  else IdxLabel.Caption := '';
  CheckButtons;
end;

procedure TIconListDialog.FormCreate(Sender: TObject);
{$IFDEF RX_D3}
var
  I: Integer;
  Image: TComponent;
{$ENDIF}
begin
{$IFDEF RX_D3}
  FileDialog := TOpenPictureDialog.Create(Self);
  for I := 0 to 4 do begin
    Image := FindComponent(Format(sImage, [I]));
    if Image <> nil then TImage(Image).Transparent := True;
  end;
{$ELSE}
  FileDialog := TOpenDialog.Create(Self);
{$ENDIF}
  with FileDialog do begin
    Title := LoadStr(srLoadIcon);
    Options := [ofHideReadOnly, ofFileMustExist];
    DefaultExt := GraphicExtension(TIcon);
    Filter := GraphicFilter(TIcon);
  end;
  Icons := TIconList.Create;
  Icons.OnChange := ListChanged;
  FTopIndex := 0;
  FSelected := 0;
  Clear.Enabled := False;
  Copy.Enabled := False;
  Delete.Enabled := False;
  CheckEnablePaste;
end;

procedure TIconListDialog.FormDestroy(Sender: TObject);
begin
  Icons.OnChange := nil;
  Icons.Free;
end;

procedure TIconListDialog.UpdateClipboard(Sender: TObject);
begin
  CheckEnablePaste;
end;

procedure TIconListDialog.LoadClick(Sender: TObject);
var
  Ico: TIcon;
  I: Integer;
{$IFNDEF RX_D3}
  FileName: string;
{$ENDIF}
begin
{$IFNDEF RX_D3}
  FileName := '';
  if SelectImage(FileName, GraphicExtension(TIcon), GraphicFilter(TIcon)) then
  begin
    FileDialog.Filename := FileName;
{$ELSE}
  if FileDialog.Execute then begin
{$ENDIF}
    Ico := TIcon.Create;
    try
      Ico.LoadFromFile(FileDialog.Filename);
      I := Min(FSelected + 1, Icons.Count);
      Icons.Insert(I, Ico);
      SetSelectedIndex(I, True);
    finally
      Ico.Free;
    end;
  end;
end;

procedure TIconListDialog.CopyClick(Sender: TObject);
begin
  CopyIconToClipboard(GetSelectedIcon, clBtnFace);
  CheckEnablePaste;
end;

procedure TIconListDialog.PasteClick(Sender: TObject);
var
  Ico: TIcon;
begin
  if Clipboard.HasFormat(CF_ICON) then begin
    Ico := CreateIconFromClipboard;
    try
      Icons[FSelected] := Ico;
    finally
      Ico.Free;
    end;
  end;
end;

procedure TIconListDialog.WMActivate(var Msg: TWMActivate);
begin
  if Msg.Active <> WA_INACTIVE then CheckEnablePaste;
  inherited;
end;

procedure TIconListDialog.ClearClick(Sender: TObject);
begin
  Icons.Clear;
end;

procedure TIconListDialog.ScrollBarChange(Sender: TObject);
begin
  SetSelectedIndex(ScrollBar.Position, False);
end;

procedure TIconListDialog.DeleteClick(Sender: TObject);
begin
  Icons.Delete(FSelected);
end;

procedure TIconListDialog.ImageMouseDown(Sender: TObject;
  Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
  Index: Integer;
begin
  if Button = mbLeft then begin
    for Index := 0 to 4 do begin
      if TComponent(Sender).Name = Format(sImage, [Index]) then Break;
      if TComponent(Sender).Name = Format(sSlot, [Index]) then Break;
    end;
    SetSelectedIndex(FTopIndex + Index, True);
  end;
end;

procedure TIconListDialog.LoadAniClick(Sender: TObject);
begin
  LoadAniFile;
end;

end.