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| unit UPersoHint;
interface
uses
Windows, Messages, SysUtils,Classes, Graphics, Controls, Forms;
type
TPersoHintWindow = class(THintWindow)
protected
procedure WMEraseBkgnd(var Msg: TWMEraseBkgnd); message WM_ERASEBKGND;
procedure Paint; override;
procedure NCPaint(DC: HDC); override;
public
constructor Create(AOwner: TComponent); override;
procedure ActivateHint(Rect: TRect; const AHint: string);override;
end;
var
StartColor:TColor;
EndColor:TColor;
implementation
type
COLOR16 = Word;
TTriVertex = packed record
x: Longint;
y: Longint;
Red: COLOR16;
Green: COLOR16;
Blue: COLOR16;
Alpha: COLOR16;
end;
function GradientFill(DC: HDC; Vertex: PTriVertex; NumVertex: ULONG; Mesh: Pointer; NumMesh, Mode: ULONG): BOOL; stdcall;external 'msimg32.dll';
{not mine}
procedure Antialiasing(Bmp: TBitmap; Percent: Integer);
type
TRGBTripleArray = array[0..32767] of TRGBTriple;
PRGBTripleArray = ^TRGBTripleArray;
var
SL, SL2: PRGBTripleArray;
l, m, p: Integer;
R, G, B: TColor; v: Single;
R1, R2, G1, G2, B1, B2: Byte;
begin
Bmp.PixelFormat :=pf24bit;
with Bmp.Canvas do
begin v:= 50 / (Percent + 50);
Brush.Style := bsClear;
Pixels[1, 1] := Pixels[1, 1];
for l := 0 to Bmp.Height - 1 do
begin
SL := Bmp.ScanLine[l];
for p := 1 to Bmp.Width - 1 do
begin
R1 := SL[p].rgbtRed;
G1 := SL[p].rgbtGreen;
B1 := SL[p].rgbtBlue;
// Left
if (p < 1) then m := Bmp.Width
else
m := p - 1;
R2 := SL[m].rgbtRed;
G2 := SL[m].rgbtGreen;
B2 := SL[m].rgbtBlue;
if (R1 <> R2) or (G1 <> G2) or (B1 <> B2) then
begin
R := Round(R1 + (R2 - R1) * v);
G := Round(G1 + (G2 - G1) *v);
B := Round(B1 + (B2 - B1) * v);
SL[m].rgbtRed := R;
SL[m].rgbtGreen := G;
SL[m].rgbtBlue := B;
end;
//Right
if (p > Bmp.Width - 2) then m := 0
else
m := p + 1;
R2 := SL[m].rgbtRed;
G2 := SL[m].rgbtGreen;
B2 := SL[m].rgbtBlue;
if (R1 <> R2) or (G1 <> G2) or (B1 <> B2) then
begin
R := Round(R1 + (R2 - R1) * v);
G := Round(G1 + (G2 - G1) * v);
B := Round(B1 + (B2 - B1) * v);
SL[m].rgbtRed := R;
SL[m].rgbtGreen := G;
SL[m].rgbtBlue := B;
end;
if (l < 1) then m := Bmp.Height - 1
else
m := l - 1;
//Over
SL2 := Bmp.ScanLine[m];
R2 := SL2[p].rgbtRed;
G2 := SL2[p].rgbtGreen;
B2 := SL2[p].rgbtBlue;
if (R1 <> R2) or (G1 <> G2) or (B1 <> B2) then
begin
R := Round(R1 + (R2 - R1) *v);
G := Round(G1 + (G2 - G1) * v);
B := Round(B1 + (B2 - B1) * v);
SL2[p].rgbtRed := R;
SL2[p].rgbtGreen := G;
SL2[p].rgbtBlue := B;
end;
if (l > Bmp.Height - 2) then m := 0
else
m := l + 1;
//Under
SL2 := Bmp.ScanLine[m];
R2 := SL2[p].rgbtRed;
G2 := SL2[p].rgbtGreen;
B2 := SL2[p].rgbtBlue;
if (R1 <> R2) or (G1 <> G2) or (B1 <> B2) then
begin
R := Round(R1 + (R2 - R1) * v);
G := Round(G1 + (G2 - G1) * v);
B := Round(B1 + (B2 - B1) * v);
SL2[p].rgbtRed := R;
SL2[p].rgbtGreen := G;
SL2[p].rgbtBlue := B;
end;
end;
end;
end;
end;
constructor TPersoHintWindow.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
StartColor:=clWhite;
EndColor:=$00EFDACA;
end;
procedure TPersoHintWindow.WMEraseBkgnd(var Msg: TWMEraseBkgnd);
begin
Msg.Result :=1;
end;
procedure TPersoHintWindow.Paint;
procedure Cplt(Var AVertex:TTriVertex;AColor:TColor);
begin
AVertex.Red:=GetRValue(AColor) shl 8;
AVertex.Green:=GetGValue(AColor)shl 8;
AVertex.Blue:=GetBValue(AColor)shl 8;
AVertex.Alpha:=0;
end;
var
Sz:TSize;
S:string;
vertex:array[0..1] of TTriVertex;
gTri :TGradientRect;
bmp:TBitmap;
begin
S:= Caption;
bmp:=TBitmap.Create;
with bmp do
try
Sz:= Canvas.TextExtent(S);
Width :=Sz.cx+8;
Height :=Sz.cy+6;
Cplt(vertex[0],StartColor);
vertex[0].X:=0;
vertex[0].Y:=0;
Cplt(vertex[1],EndColor);
vertex[1].X:=Width ;
vertex[1].Y:=Height;
gTri.UpperLeft := 0;
gTri.LowerRight := 1;
GradientFill(Canvas.handle,@vertex , 2, @gTri, 1, GRADIENT_FILL_RECT_V);
Canvas.Brush.Style:=bsClear;
Canvas.TextOut(4,2,S);
Antialiasing(bmp,5);
Self.Width :=Width;
Self.Height :=Height;
Self.Canvas.Draw(0,0,bmp);
finally
bmp.Free();
end;
end;
procedure TPersoHintWindow.ActivateHint(Rect: TRect; const AHint: string);
begin
if not IsWindowvisible(Self.Handle) then
inherited;
end;
procedure TPersoHintWindow.NCPaint(DC: HDC);
begin
with TCanvas.Create do
begin
Handle :=DC;
Brush.Color :=clblack;
fillrect(cliprect);
free;
end;
end;
initialization
if not (csDesigning in Application.ComponentState) then
HintWindowClass := TPersoHintWindow;
end. |
Partager