ScreenMate

{*******************************************************}
                                                      { }
                           { Delphi VCL Extensions (RX) }
                                                      { }
                    { Copyright (c) 1995, 1996 AO ROSNO }
                 { Copyright (c) 1997, 1998 Master-Bank }
                                                      { }
{*******************************************************}

unit Animate;

interface

{$I RX.INC}

uses Messages, {$IFDEF WIN32}Windows, {$ELSE}WinTypes, WinProcs,
{$ENDIF}
  SysUtils, Classes, Graphics, Controls, Forms, StdCtrls, Menus,
  ExtCtrls;

type
  TGlyphOrientation = (goHorizontal, goVertical);

  { TRxImageControl }

  TRxImageControl = class(TGraphicControl)
  private
    FDrawing: Boolean;
  protected
    FGraphic: TGraphic;
    function DoPaletteChange: Boolean;
    procedure DoPaintImage; virtual; abstract;
    procedure PaintDesignRect;
    procedure PaintImage;
    procedure PictureChanged;
  public
    constructor Create(AOwner: TComponent); override;
  end;

  { TAnimatedImage }

  TAnimatedImage = class(TRxImageControl)
  private
    { Private declarations }
    FActive: Boolean;
    FAutoSize: Boolean;
    FGlyph: TBitmap;
    FImageWidth: Integer;
    FImageHeight: Integer;
    FInactiveGlyph: Integer;
    FOrientation: TGlyphOrientation;
    FTimer: TTimer;
    FNumGlyphs: Integer;
    FGlyphNum: Integer;
    FStretch: Boolean;
    FTransparentColor: TColor;
    FOpaque: Boolean;
    FTimerRepaint: Boolean;
    FOnFrameChanged: TNotifyEvent;
    FOnStart: TNotifyEvent;
    FOnStop: TNotifyEvent;
    procedure DefineBitmapSize;
    procedure ResetImageBounds;
    procedure AdjustBounds;
    function GetInterval: Cardinal;
    procedure SetAutoSize(Value: Boolean);
    procedure SetInterval(Value: Cardinal);
    procedure SetActive(Value: Boolean);
    procedure SetOrientation(Value: TGlyphOrientation);
    procedure SetGlyph(Value: TBitmap);
    procedure SetGlyphNum(Value: Integer);
    procedure SetInactiveGlyph(Value: Integer);
    procedure SetNumGlyphs(Value: Integer);
    procedure SetStretch(Value: Boolean);
    procedure SetTransparentColor(Value: TColor);
    procedure SetOpaque(Value: Boolean);
    procedure ImageChanged(Sender: TObject);
    procedure UpdateInactive;
    procedure TimerExpired(Sender: TObject);
    function TransparentStored: Boolean;
    procedure WMSize(var Message: TWMSize); message WM_SIZE;
  protected
    { Protected declarations }
    function GetPalette: HPALETTE; override;
    procedure Loaded; override;
    procedure Paint; override;
    procedure DoPaintImage; override;
    procedure FrameChanged; dynamic;
    procedure Start; dynamic;
    procedure Stop; dynamic;
  public
    { Public declarations }
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure DoPaintImageOn(Mycanvas: Tcanvas; x, y: integer);
      virtual;
  published
    { Published declarations }
    property Active: Boolean read FActive write SetActive default
      False;
    property Align;
    property AutoSize: Boolean read FAutoSize write SetAutoSize
      default True;
    property Orientation: TGlyphOrientation read FOrientation write
      SetOrientation
      default goHorizontal;
    property Glyph: TBitmap read FGlyph write SetGlyph;
    property GlyphNum: Integer read FGlyphNum write SetGlyphNum
      default 0;
    property Interval: Cardinal read GetInterval write SetInterval
      default 100;
    property NumGlyphs: Integer read FNumGlyphs write SetNumGlyphs
      default 1;
    property InactiveGlyph: Integer read FInactiveGlyph write
      SetInactiveGlyph default -1;
    property TransparentColor: TColor read FTransparentColor write
      SetTransparentColor
      stored TransparentStored;
    property Opaque: Boolean read FOpaque write SetOpaque default
      False;
    property Color;
    property Cursor;
    property DragCursor;
    property DragMode;
    property ParentColor default True;
    property ParentShowHint;
    property PopupMenu;
    property ShowHint;
    property Stretch: Boolean read FStretch write SetStretch default
      True;
    property Visible;
    property OnClick;
    property OnDblClick;
    property OnMouseMove;
    property OnMouseDown;
    property OnMouseUp;
    property OnDragOver;
    property OnDragDrop;
    property OnEndDrag;
{$IFDEF WIN32}
    property OnStartDrag;
{$ENDIF}
    property OnFrameChanged: TNotifyEvent read FOnFrameChanged write
      FOnFrameChanged;
    property OnStart: TNotifyEvent read FOnStart write FOnStart;
    property OnStop: TNotifyEvent read FOnStop write FOnStop;
  end;

implementation

uses RxConst, VCLUtils;

{ TRxImageControl }

constructor TRxImageControl.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  ControlStyle := [csClickEvents, csCaptureMouse, csOpaque,
{$IFDEF WIN32}csReplicatable, {$ENDIF}csDoubleClicks];
  Height := 105;
  Width := 105;
  ParentColor := True;
end;

procedure TRxImageControl.PaintImage;
var
  Save: Boolean;
begin
  Save := FDrawing;
  FDrawing := True;
  try
    DoPaintImage;
  finally
    FDrawing := Save;
  end;
end;

procedure TRxImageControl.PaintDesignRect;
begin
  if csDesigning in ComponentState then
    with Canvas do
    begin
      Pen.Style := psDash;
      Brush.Style := bsClear;
      Rectangle(0, 0, Width, Height);
    end;
end;

function TRxImageControl.DoPaletteChange: Boolean;
var
  ParentForm: TCustomForm;
  Tmp: TGraphic;
begin
  Result := False;
  Tmp := FGraphic;
  if Visible and (not (csLoading in ComponentState)) and (Tmp <>
    nil)
{$IFDEF RX_D3} and (Tmp.PaletteModified){$ENDIF} then
  begin
    if (GetPalette <> 0) then
    begin
      ParentForm := GetParentForm(Self);
      if Assigned(ParentForm) and ParentForm.Active and
        Parentform.HandleAllocated then
      begin
        if FDrawing then
          ParentForm.Perform(WM_QUERYNEWPALETTE, 0, 0)
        else
          PostMessage(ParentForm.Handle, WM_QUERYNEWPALETTE, 0, 0);
        Result := True;
{$IFDEF RX_D3}
        Tmp.PaletteModified := False;
{$ENDIF}
      end;
    end
{$IFDEF RX_D3}
    else
    begin
      Tmp.PaletteModified := False;
    end;
{$ENDIF}
  end;
end;

procedure TRxImageControl.PictureChanged;
begin
  if (FGraphic <> nil) then
    if DoPaletteChange and FDrawing then
      Update;
  if not FDrawing then
    Invalidate;
end;

{ TAnimatedImage }

constructor TAnimatedImage.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FTimer := TTimer.Create(Self);
  Interval := 100;
  FGlyph := TBitmap.Create;
  FGraphic := FGlyph;
  FGlyph.OnChange := ImageChanged;
  FGlyphNum := 0;
  FNumGlyphs := 1;
  FInactiveGlyph := -1;
  FTransparentColor := clNone;
  FOrientation := goHorizontal;
  FAutoSize := True;
  FStretch := True;
  Width := 32;
  Height := 32;
end;

destructor TAnimatedImage.Destroy;
begin
  FOnFrameChanged := nil;
  FOnStart := nil;
  FOnStop := nil;
  FGlyph.OnChange := nil;
  Active := False;
  FGlyph.Free;
  inherited Destroy;
end;

procedure TAnimatedImage.Loaded;
begin
  inherited Loaded;
  ResetImageBounds;
  UpdateInactive;
end;

function TAnimatedImage.GetPalette: HPALETTE;
begin
  Result := 0;
  if not FGlyph.Empty then
    Result := FGlyph.Palette;
end;

procedure TAnimatedImage.ImageChanged(Sender: TObject);
begin
  FTransparentColor := FGlyph.TransparentColor and not PaletteMask;
  DefineBitmapSize;
  AdjustBounds;
  PictureChanged;
end;

procedure TAnimatedImage.UpdateInactive;
begin
  if (not Active) and (FInactiveGlyph >= 0) and
    (FInactiveGlyph < FNumGlyphs) and (FGlyphNum <> FInactiveGlyph) then
  begin
    FGlyphNum := FInactiveGlyph;
  end;
end;

function TAnimatedImage.TransparentStored: Boolean;
begin
  Result := (FGlyph.Empty and (FTransparentColor <> clNone)) or
    ((FGlyph.TransparentColor and not PaletteMask) <>
    FTransparentColor);
end;

procedure TAnimatedImage.SetOpaque(Value: Boolean);
begin
  if Value <> FOpaque then
  begin
    FOpaque := Value;
    PictureChanged;
  end;
end;

procedure TAnimatedImage.SetTransparentColor(Value: TColor);
begin
  if Value <> TransparentColor then
  begin
    FTransparentColor := Value;
    PictureChanged;
  end;
end;

procedure TAnimatedImage.SetOrientation(Value: TGlyphOrientation);
begin
  if FOrientation <> Value then
  begin
    FOrientation := Value;
    DefineBitmapSize;
    AdjustBounds;
    Invalidate;
  end;
end;

procedure TAnimatedImage.SetGlyph(Value: TBitmap);
begin
  FGlyph.Assign(Value);
end;

procedure TAnimatedImage.SetStretch(Value: Boolean);
begin
  if Value <> FStretch then
  begin
    FStretch := Value;
    PictureChanged;
    if Active then
      Repaint;
  end;
end;

procedure TAnimatedImage.SetGlyphNum(Value: Integer);
begin
  if Value <> FGlyphNum then
  begin
    if (Value < FNumGlyphs) and (Value >= 0) then
    begin
      FGlyphNum := Value;
      UpdateInactive;
      FrameChanged;
      PictureChanged;
    end;
  end;
end;

procedure TAnimatedImage.SetInactiveGlyph(Value: Integer);
begin
  if Value < 0 then
    Value := -1;
  if Value <> FInactiveGlyph then
  begin
    if (Value < FNumGlyphs) or (csLoading in ComponentState) then
    begin
      FInactiveGlyph := Value;
      UpdateInactive;
      FrameChanged;
      PictureChanged;
    end;
  end;
end;

procedure TAnimatedImage.SetNumGlyphs(Value: Integer);
begin
  FNumGlyphs := Value;
  if FInactiveGlyph >= FNumGlyphs then
  begin
    FInactiveGlyph := -1;
    FGlyphNum := 0;
  end
  else
    UpdateInactive;
  FrameChanged;
  ResetImageBounds;
  AdjustBounds;
  PictureChanged;
end;

procedure TAnimatedImage.DefineBitmapSize;
begin
  FNumGlyphs := 1;
  FGlyphNum := 0;
  FImageWidth := 0;
  FImageHeight := 0;
  if (FOrientation = goHorizontal) and (FGlyph.Height > 0) and
    (FGlyph.Width mod FGlyph.Height = 0) then
    FNumGlyphs := FGlyph.Width div FGlyph.Height
  else if (FOrientation = goVertical) and (FGlyph.Width > 0) and
    (FGlyph.Height mod FGlyph.Width = 0) then
    FNumGlyphs := FGlyph.Height div FGlyph.Width;
  ResetImageBounds;
end;

procedure TAnimatedImage.ResetImageBounds;
begin
  if FNumGlyphs < 1 then
    FNumGlyphs := 1;
  if FOrientation = goHorizontal then
  begin
    FImageHeight := FGlyph.Height;
    FImageWidth := FGlyph.Width div FNumGlyphs;
  end
  else {if Orientation = goVertical then}
  begin
    FImageWidth := FGlyph.Width;
    FImageHeight := FGlyph.Height div FNumGlyphs;
  end;
end;

procedure TAnimatedImage.AdjustBounds;
begin
  if not (csReading in ComponentState) then
  begin
    if FAutoSize and (FImageWidth > 0) and (FImageHeight > 0) then
      SetBounds(Left, Top, FImageWidth, FImageHeight);
  end;
end;

type
  TParentControl = class(TWinControl);