// SPDX-License-Identifier: LGPL-3.0-linking-exception
{
  Created by BGRA Controls Team
  Dibo, Circular, lainz (007) and contributors.
  For detailed information see readme.txt

  Site: https://sourceforge.net/p/bgra-controls/
  Wiki: http://wiki.lazarus.freepascal.org/BGRAControls
  Forum: http://forum.lazarus.freepascal.org/index.php/board,46.0.html
}
{******************************* CONTRIBUTOR(S) ******************************
- Edivando S. Santos Brasil | mailedivando@gmail.com
  (Compatibility with delphi VCL 11/2018)

***************************** END CONTRIBUTOR(S) *****************************}
unit BCToolBar;

{$I bgracontrols.inc}

interface

uses
  Classes, {$IFDEF FPC}LResources,{$ELSE}types, BGRAGraphics, GraphType, FPImage,{$ENDIF}
  Forms, Controls, Graphics, Dialogs, ComCtrls,
  BGRABitmap, BGRABitmapTypes, BGRAGradients, BCTypes;

type

  { TBCToolBar }

  TBCToolBar = class(TToolBar)
  private
    FLimitMemoryUsage: boolean;
    { Private declarations }
    FOnRedraw: TBGRARedrawEvent;
    FBGRA: TBGRABitmap;
    procedure SetLimitMemoryUsage(AValue: boolean);
  protected
    { Protected declarations }
   {$IFDEF FPC}
   procedure Paint; override;
   {$ELSE}
   procedure Paint; virtual;
   procedure PaintWindow(DC: HDC); override;
   {$ENDIF}
    procedure CheckMemoryUsage; virtual;
  public
    { Public declarations }
    constructor Create(TheOwner: TComponent); override;
    destructor Destroy; override;
  published
    { Published declarations }
    property OnRedraw: TBGRARedrawEvent read FOnRedraw write FOnRedraw;
    property LimitMemoryUsage: boolean read FLimitMemoryUsage write SetLimitMemoryUsage;
  end;

procedure DrawWindows7ToolBar(Bitmap: TBGRABitmap; AColor: TColor = clDefault);

{$IFDEF FPC}procedure Register;{$ENDIF}

implementation

function SetHue(AColor: TBGRAPixel; g_hue: integer): TBGRAPixel;
var hsla: THSLAPixel;
begin
  if g_hue = -1 then result := AColor else
    begin
      hsla := BGRAToHSLA(AColor);
      hsla.hue := g_hue;
      result := GSBAToBGRA(hsla);
    end;
end;

procedure DrawWindows7ToolBar(Bitmap: TBGRABitmap; AColor: TColor = clDefault);
var
  c1, c2, c3, c4: TBGRAPixel;
  ARect, ARect2: TRect;
  g_hue: integer;
begin
  if AColor = clDefault then
    g_hue := -1
  else
    g_hue := BGRAToGSBA(AColor).hue;
  ARect := Rect(0, 0, Bitmap.Width, Bitmap.Height);
  // Font: RGBToColor(30,57,91)

  Bitmap.HorizLine(ARect.Left, ARect.Top, ARect.Right-1, SetHue(BGRA(169, 191, 214), g_hue), dmSet);
  Bitmap.HorizLine(ARect.Left, ARect.Top + 1, ARect.Right-1, SetHue(BGRA(250, 252, 253), g_hue), dmSet);
  Bitmap.HorizLine(ARect.Left, ARect.Top + 2, ARect.Right-1, SetHue(BGRA(253, 254, 255), g_hue), dmSet);

  c1 := SetHue(BGRA(252, 254, 255), g_hue);
  c2 := SetHue(BGRA(243, 248, 253), g_hue);
  c3 := SetHue(BGRA(238, 243, 250), g_hue);
  c4 := SetHue(BGRA(238, 244, 251), g_hue);
  ARect2 := Rect(ARect.Left, ARect.Top + 3, ARect.Right, ARect.Bottom - 3);
  DoubleGradientAlphaFill(Bitmap, ARect2, c1, c2, c3, c4, gdVertical,
    gdVertical, gdVertical, 0.5);

  c1 := SetHue(BGRA(249, 252, 255), g_hue);
  c2 := SetHue(BGRA(230, 240, 250), g_hue);
  c3 := SetHue(BGRA(220, 230, 244), g_hue);
  c4 := SetHue(BGRA(221, 233, 247), g_hue);
  ARect2 := Rect(ARect.Left + 1, ARect.Top + 3, ARect.Right - 1, ARect.Bottom - 3);
  DoubleGradientAlphaFill(Bitmap, ARect2, c1, c2, c3, c4, gdVertical,
    gdVertical, gdVertical, 0.5);

  Bitmap.HorizLine(ARect.Left, ARect.Bottom - 3, ARect.Right-1, SetHue(BGRA(228, 239, 251), g_hue), dmSet);
  Bitmap.HorizLine(ARect.Left, ARect.Bottom - 2, ARect.Right-1, SetHue(BGRA(205, 218, 234), g_hue), dmSet);
  Bitmap.HorizLine(ARect.Left, ARect.Bottom - 1, ARect.Right-1, SetHue(BGRA(160, 175, 195), g_hue), dmSet);
end;

{$IFDEF FPC}
procedure Register;
begin
  RegisterComponents('BGRA Controls', [TBCToolBar]);
end;
{$ENDIF}

{ TBCToolBar }

constructor TBCToolBar.Create(TheOwner: TComponent);
begin
  inherited Create(TheOwner);
  FBGRA := TBGRABitmap.Create;
end;

destructor TBCToolBar.Destroy;
begin
  FBGRA.Free;
  inherited Destroy;
end;

procedure TBCToolBar.SetLimitMemoryUsage(AValue: boolean);
begin
  if FLimitMemoryUsage=AValue then Exit;
  FLimitMemoryUsage:=AValue;
  CheckMemoryUsage;
end;

{$IFNDEF FPC}
procedure TBCToolBar.PaintWindow(DC: HDC);
begin
  Canvas.Lock;
  try
    Canvas.Handle := DC;
    try
      TControlCanvas(Canvas).UpdateTextFlags;
      Paint;
    finally
      Canvas.Handle := 0;
    end;
  finally
    Canvas.Unlock;
  end;
end;
{$ENDIF}

procedure TBCToolBar.Paint;
begin
  if (FBGRA.Width <> Width) or (FBGRA.Height <> Height) then
  begin
    FBGRA.SetSize(Width, Height);
    if Assigned(FOnRedraw) then
      { Draw using event }
      FOnRedraw(self, FBGRA)
    else
      { Draw this default }
      DrawWindows7ToolBar(FBGRA, Color);
  end;
  FBGRA.Draw(Canvas, 0, 0);
  CheckMemoryUsage;
end;

procedure TBCToolBar.CheckMemoryUsage;
begin
  if FLimitMemoryUsage then
  begin
    if FBGRA.NbPixels <> 0 then
      FBGRA.SetSize(0,0);
  end;
end;

end.