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| unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ExtCtrls, ComCtrls, XPMan, Buttons;
type
TForm1 = class(TForm)
RedBar: TTrackBar;
GreenBar: TTrackBar;
BlueBar: TTrackBar;
Shape1: TShape;
Label1: TLabel;
ExportColor: TSpeedButton;
PaintBox1: TPaintBox;
ScrollBar1: TScrollBar;
ColorMode: TSpeedButton;
procedure ColorBarChange(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormDblClick(Sender: TObject);
procedure FormMouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
procedure FormMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure ExportColorClick(Sender: TObject);
procedure FormHide(Sender: TObject);
procedure PaintBox1Paint(Sender: TObject);
procedure PaintBox1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure PaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
procedure PaintBox1MouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure ScrollBar1Change(Sender: TObject);
procedure ColorModeClick(Sender: TObject);
private
FDisableChange:boolean;
FHtmlColor: TColor;
FHDC: HDC;
FMoveFormPos :TPoint;
FPaletteHandle:HPalette;
procedure PutColor(Value :TColor);
procedure SetHtmlColor(const Value: TColor);
procedure RandomPal;
procedure DeLPal;
procedure ColorFromPixel;
protected
procedure CreateParams(var params : TCreateparams); override;
public
function ColorStr():string;
property HtmlColor :TColor read FHtmlColor write SetHtmlColor;
// property ColorStr :string read FHtmlColor write GetetHtmlColor;
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
uses ClipBrd;
type
ColorRec = record
case Integer of
0: (Color: TColor);
1: (R,G,B,A: byte);
end;
{DelphiDabbler.com}
procedure PostKeyEx32(const Key: Word; const Shift: Classes.TShiftState;
const SpecialKey: Boolean = False);
type
TShiftKeyInfo = record // information about a shoft key
Shift: Byte; // shift key
VKey: Byte; // virtual key code
end;
ByteSet = set of 0..7; // byte sized bitset
const
// map of shift state values to virtual keys
ShiftKeys: array[ 1..3 ] of TShiftKeyInfo = (
(Shift: Ord(Classes.ssCtrl); VKey: Windows.VK_CONTROL),
(Shift: Ord(Classes.ssShift); VKey: Windows.VK_SHIFT),
(Shift: Ord(Classes.ssAlt); VKey: Windows.VK_MENU)
);
var
Flag: DWORD; // flag passed to keybd_event
ShiftSet: ByteSet absolute Shift; // shift state as bit set
I: Integer; // loop variable
begin
// generate any shift key down events
for I := 1 to 3 do
if ShiftKeys[I].Shift in ShiftSet then
Windows.keybd_event(
ShiftKeys[I].VKey,
Windows.MapVirtualKey(ShiftKeys[I].VKey, 0),
0,
0
);
// generate key down then key up event for key
if SpecialKey then
Flag := Windows.KEYEVENTF_EXTENDEDKEY
else
Flag := 0;
Windows.keybd_event(Key, Windows.MapVirtualKey(Key, 0), Flag, 0);
Flag := Flag or Windows.KEYEVENTF_KEYUP;
Windows.keybd_event(Key, Windows.MapVirtualKey(Key, 0), Flag, 0);
// generate any shift key up events in reverse order of key down events
for I := 3 downto 1 do
if ShiftKeys[I].Shift in ShiftSet then
Windows.keybd_event(
ShiftKeys[I].VKey,
Windows.MapVirtualKey(ShiftKeys[I].VKey, 0),
Windows.KEYEVENTF_KEYUP,
0
);
end;
procedure TForm1.CreateParams(var Params: TCreateparams);
begin
inherited;
Params.ExStyle := Params.ExStyle or WS_EX_NOACTIVATE;
end;
function TForm1.ColorStr():string;
begin
with ColorRec(FHtmlColor) do
Result:=Format('#%.2x%.2x%.2x',[R,G,B]);
end;
procedure TForm1.PutColor(Value :TColor);
begin
if Value = FHtmlColor then Exit;
FHtmlColor :=Value;
Label1.Caption :=ColorStr();
Shape1.Brush.Color:= FHtmlColor;
Application.ProcessMessages
end;
procedure TForm1.SetHtmlColor(const Value: TColor);
begin
with ColorRec(Value) do
begin
FHtmlColor := Color;
RedBar.Position := R;
GreenBar.Position:= G;
BlueBar.Position := B;
end;
end;
procedure TForm1.ColorBarChange(Sender: TObject);
begin
if FDisableChange then Exit;
PutColor(RGB(RedBar.Position ,
GreenBar.Position,
BlueBar.Position));
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
DoubleBuffered:=True;
FormStyle :=fsStayOnTop;
ColorModeClick(nil);
Scrollbar1.Position:=128;
end;
procedure TForm1.FormDblClick(Sender: TObject);
begin
Close
end;
procedure TForm1.FormMouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
begin
// ReleaseCapture();
// Perform(WM_SYSCOMMAND, $F012, 0);
if not( ssLeft in Shift) then
Exit;
Left := Left+ X - FMoveFormPos.X;
Top := Top + Y - FMoveFormPos.Y;
end;
procedure TForm1.FormMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
FMoveFormPos.X := X;
FMoveFormPos.Y := Y;
end;
procedure TForm1.ExportColorClick(Sender: TObject);
begin
Clipboard.AsText := ColorStr();
PostKeyEx32(Word('V'),[ssCtrl],True); //Ctrl+V
end;
procedure TForm1.FormHide(Sender: TObject);
begin
DeLPal() ;
if FHDC = 0 then Exit;
ReleaseDc(0,FHDC);
FHDC := 0;
FDisableChange := False;
end;
procedure ColorSet(var Start:integer;Canvas:TCanvas;Idx,C1,C2,C3:byte;inv:boolean);
var
I,RecDim,T,itt,B:integer;
R:TRect;
begin
with Longrec(RecDim)do
begin
Bytes[0]:=C1;
Bytes[1]:=C2;
Bytes[2]:=C3;
Bytes[3]:= 0;
end;
Itt :=10;
T:= 256 div Itt;
with Canvas do
begin
if inv then
for I := T-1 downto 0 do
begin
R:= Bounds(Start,5,1,50);
Brush.Color := RecDim or((I*itt) shl Idx);
FillRect(R);
inc(Start);
end else
for I := 0 to T-1 do
begin
R:= Bounds(Start,5,1,50);
Brush.Color := RecDim or((I*itt) shl Idx);
FillRect(R);
inc(Start);
end;
end;
end;
procedure TForm1.ColorFromPixel();
var
Pt:TPoint;
begin
GetCursorPos(Pt);
PutColor(GetPixel(FHDC,Pt.X,Pt.Y));
HtmlColor:=FHtmlColor;
end;
procedure TForm1.PaintBox1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
if not(ssLeft in Shift)then Exit;
if FHDC = 0 then
FHDC :=GetDC(0);
FDisableChange := True;
SetCursor(windows.LoadCursor(0,IDC_HAND));
ColorFromPixel();
end;
procedure TForm1.PaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
begin
if (ssLeft in Shift)then
ColorFromPixel();
end;
procedure TForm1.PaintBox1MouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
FormHide(nil);
end;
procedure TForm1.DeLPal;
begin
if FPaletteHandle <>0 then
begin
DeleteObject(FPaletteHandle);
FPaletteHandle:=0;
end;
end;
function ShowPalette(Dc:Hdc;HPal:HPalette;var Dest:TRect):integer;
var
OldBrush : hBrush;
Brush : hBrush;
PalOld : HPalette;
I,Row,Col : integer;
RecDim : integer;
XLen,YLen : integer;
begin
Result := 0;
if HPal = 0 then
Exit;
Result := GetPaletteEntries(HPal, 0, 0, nil^);
if Result = 0 then
Exit;
RecDim := (Dest.Right - Dest.Left) div 16;
PalOld :=SelectPalette(Dc, HPal, false);
RealizePalette(Dc);
for I := 0 to Result-1 do
begin
Row := I div 16 ;
Col := I mod 16 ;
Brush := CreateSolidBrush($01000000 or I);
OldBrush := SelectObject(Dc, Brush);
Rectangle(Dc,
Dest.Left+ RecDim*Col-1, Dest.Top+ RecDim*Row-1,
Dest.Left+RecDim*(Col+1), Dest.Top+ RecDim*(Row+1));
SelectObject(Dc, OldBrush);
DeleteObject(Brush);
end;
SelectPalette(Dc, PalOld, false);
end;
procedure TForm1.RandomPal();
var
i : integer;
Pal: TMaxLogPalette;
Pos:integer;
Size:integer;
begin
Pos :=Scrollbar1.position;
Pal.palVersion := $0300;
Pal.palNumEntries := 256;
for i := 0 to 255 do
with Pal.palPalEntry[i] do
begin
peRed := 255-Random(pos);
peGreen := 255-Random(pos);
peBlue := 255-Random(pos);
peFlags := PC_RESERVED;
end;
DeLPal();
FPaletteHandle := CreatePalette(PLogPalette(@Pal)^);
end;
procedure TForm1.PaintBox1Paint(Sender: TObject);
var
R:Trect;
I:integer;
begin
if ColorMode.Tag = 1 then
begin
I:=0;
ColorSet(I,PaintBox1.Canvas,8,255,0,0,false);
ColorSet(I,PaintBox1.Canvas,0,0,255,0,true);
ColorSet(I,PaintBox1.Canvas,16,0,255,0,false);
ColorSet(I,PaintBox1.Canvas,8,0,0,255,true);
ColorSet(I,PaintBox1.Canvas,0,0,0,255,false);
ColorSet(I,PaintBox1.Canvas,16,255,0,0,true);
end else begin
R:=PaintBox1.ClientRect;
ShowPalette(PaintBox1.Canvas.Handle ,FPaletteHandle,R);
end;
end;
procedure TForm1.ScrollBar1Change(Sender: TObject);
begin
RandSeed:= ScrollBar1.Position;
RandomPal;
PaintBox1.Repaint
end;
procedure TForm1.ColorModeClick(Sender: TObject);
begin
if ColorMode.Tag = 0 then
begin
DeLPal();
PaintBox1.Height :=22;
ColorMode.Tag:=1;
Height:=PaintBox1.Top+22+10;
end else begin
PaintBox1.Height :=150;
ColorMode.Tag:=0;
Height:=(PaintBox1.Top+150+10)+(ScrollBar1.Height+10);
RandomPal
end;
end;
end. |
