平滑SpeedButton

unit TFlatSpeedButtonUnit;

interface

{$I Version.inc}

uses Windows, Messages, Classes, Controls, Forms, Graphics, StdCtrls, ExtCtrls,
  CommCtrl, Buttons, FlatUtilitys;

type
  TFlatSpeedButton = class(TGraphicControl)
  private
    FUseAdvColors: Boolean;
    FAdvColorFocused: TAdvColors;
    FAdvColorDown: TAdvColors;
    FAdvColorBorder: TAdvColors;
    TextBounds: TRect;
    GlyphPos: TPoint;
    FNumGlyphs: TNumGlyphs;
    FDownColor: TColor;
    FBorderColor: TColor;
    FColorHighlight: TColor;
    FColorShadow: TColor;
    FFocusedColor: TColor;
    FGroupIndex: Integer;
    FGlyph: TBitmap;
    FDown: Boolean;
    FDragging: Boolean;
    FAllowAllUp: Boolean;
    FLayout: TButtonLayout;
    FSpacing: Integer;
    FMargin: Integer;
    FMouseInControl: Boolean;
    FModalResult: TModalResult;
    procedure SetColors (Index: Integer; Value: TColor);
    procedure SetAdvColors (Index: Integer; Value: TAdvColors);
    procedure SetUseAdvColors (Value: Boolean);
    procedure UpdateExclusive;
    procedure SetGlyph (Value: TBitmap);
    procedure SetNumGlyphs (Value: TNumGlyphs);
    procedure SetDown (Value: Boolean);
    procedure SetAllowAllUp (Value: Boolean);
    procedure SetGroupIndex (Value: Integer);
    procedure SetLayout (Value: TButtonLayout);
    procedure SetSpacing (Value: Integer);
    procedure SetMargin (Value: Integer);
    procedure UpdateTracking;
    procedure WMLButtonDblClk (var Message: TWMLButtonDown); message WM_LBUTTONDBLCLK;
    procedure CMEnabledChanged (var Message: TMessage); message CM_ENABLEDCHANGED;
    procedure CMButtonPressed (var Message: TMessage); message CM_BUTTONPRESSED;
    procedure CMDialogChar (var Message: TCMDialogChar); message CM_DIALOGCHAR;
    procedure CMFontChanged (var Message: TMessage); message CM_FONTCHANGED;
    procedure CMTextChanged (var Message: TMessage); message CM_TEXTCHANGED;
    procedure CMSysColorChange (var Message: TMessage); message CM_SYSCOLORCHANGE;
    procedure CMParentColorChanged (var Message: TWMNoParams); message CM_PARENTCOLORCHANGED;
    procedure RemoveMouseTimer;
    procedure MouseTimerHandler (Sender: TObject);
  protected
    FState: TButtonState;
    function GetPalette: HPALETTE; override;
    procedure CalcAdvColors;
    procedure Loaded; override;
    procedure MouseDown (Button: TMouseButton; Shift: TShiftState; X, Y: Integer); override;
    procedure MouseMove (Shift: TShiftState; X, Y: Integer); override;
    procedure MouseUp (Button: TMouseButton; Shift: TShiftState; X, Y: Integer); override;
    procedure Paint; override;
  public
    constructor Create (AOwner: TComponent); override;
    destructor Destroy; override;
    procedure Click; override;
    procedure MouseEnter;
    procedure MouseLeave;
  published
    property AllowAllUp: Boolean read FAllowAllUp write SetAllowAllUp default False;
    property Color default $00E1EAEB;
    property ColorFocused: TColor index 0 read FFocusedColor write SetColors default $00E1EAEB;
    property ColorDown: TColor index 1 read FDownColor write SetColors default $00C5D6D9;
    property ColorBorder: TColor index 2 read FBorderColor write SetColors default $008396A0;
    property ColorHighLight: TColor index 3 read FColorHighlight write SetColors default clWhite;
    property ColorShadow: TColor index 4 read FColorShadow write SetColors default clBlack;
    property AdvColorFocused: TAdvColors index 0 read FAdvColorFocused write SetAdvColors default 10;
    property AdvColorDown: TAdvColors index 1 read FAdvColorDown write SetAdvColors default 10;
    property AdvColorBorder: TAdvColors index 2 read FAdvColorBorder write SetAdvColors default 50;
    property UseAdvColors: Boolean read FUseAdvColors write SetUseAdvColors default false;
    property GroupIndex: Integer read FGroupIndex write SetGroupIndex default 0;
    property Down: Boolean read FDown write SetDown default False;
    property Caption;
    property Enabled;
    property Font;
    property Glyph: TBitmap read FGlyph write SetGlyph;
    property Layout: TButtonLayout read FLayout write SetLayout default blGlyphTop;
    property Margin: Integer read FMargin write SetMargin default -1;
    property NumGlyphs: TNumGlyphs read FNumGlyphs write SetNumGlyphs default 1;
    property ModalResult: TModalResult read FModalResult write FModalResult default 0;
    property ParentFont;
    property ParentColor;
    property ParentShowHint;
    property PopupMenu;
    property ShowHint;
    property Spacing: Integer read FSpacing write SetSpacing default 4;
    property Visible;
    property OnClick;
    property OnDblClick;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
   {$IFDEF D4CB4}
    property Anchors;
    property BiDiMode;
    property Constraints;
    property DragKind;
    property ParentBiDiMode;
    property OnEndDock;
    property OnStartDock;
   {$ENDIF}
  end;

var
  MouseInControl: TFlatSpeedButton = nil;

implementation

var
  MouseTimer: TTimer = nil;
  ControlCounter: Integer = 0;

constructor TFlatSpeedButton.Create (AOwner: TComponent);
begin
  inherited Create(AOwner);
  if MouseTimer = nil then
  begin
    MouseTimer := TTimer.Create(nil);
    MouseTimer.Enabled := False;
    MouseTimer.Interval := 100; // 10 times a second
  end;
  SetBounds(0, 0, 25, 25);
  ControlStyle := [csCaptureMouse, csOpaque, csDoubleClicks];
  FGlyph := TBitmap.Create;
  FNumGlyphs := 1;
  ParentFont := True;
  ParentColor := True;
  FFocusedColor := $00E1EAEB;
  FDownColor := $00C5D6D9;
  FBorderColor := $008396A0;
  FColorHighlight := clWhite;
  FColorShadow := clBlack;
  FSpacing := 4;
  FMargin := -1;
  FLayout := blGlyphTop;
  FUseAdvColors := false;
  FAdvColorFocused := 10;
  FAdvColorDown := 10;
  FAdvColorBorder := 50;
  FModalResult := mrNone;
  Inc(ControlCounter);
end;

destructor TFlatSpeedButton.Destroy;
begin
  RemoveMouseTimer;
  FGlyph.Free;
  Dec(ControlCounter);
  if ControlCounter = 0 then
  begin
    MouseTimer.Free;
    MouseTimer := nil;
  end;
  inherited Destroy;
end;

procedure TFlatSpeedButton.Paint;
var
  FTransColor: TColor;
  FImageList: TImageList;
  sourceRect, destRect: TRect;
  tempGlyph, memoryBitmap: TBitmap;
  buttonRect: TRect;
  Offset: TPoint;
begin
  // get the transparent color
  FTransColor := FGlyph.Canvas.Pixels[0, FGlyph.Height - 1];
  buttonRect := ClientRect;

  memoryBitmap := TBitmap.Create; // create memory-bitmap to draw flicker-free
  try
    memoryBitmap.Height := ClientRect.Bottom;
    memoryBitmap.Width := ClientRect.Right;
    memoryBitmap.Canvas.Font := Self.Font;

    if FState in [bsDown, bsExclusive] then
      Offset := Point(1, 1)
    else
      Offset := Point(0, 0);

    CalcButtonLayout(memoryBitmap.Canvas, ClientRect, Offset, FLayout, FSpacing,
      FMargin, FGlyph, FNumGlyphs, Caption, TextBounds, GlyphPos);

    if not Enabled then
    begin
      FState := bsDisabled;
      FDragging := False;
    end
    else
      if FState = bsDisabled then
        if FDown and (GroupIndex <> 0) then
          FState := bsExclusive
        else
        &nb

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