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unitcolourpalette.pas
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unitcolourpalette.pas
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unit UnitColourPalette;
// Copyright 2022-2024 Zoran Vučenović
// SPDX-License-Identifier: Apache-2.0
{$mode ObjFPC}{$H+}
{$i zxinc.inc}
interface
uses
Classes, SysUtils, Types, UnitSpectrumColourMap, CommonFunctionsLCL,
UnitCommonSpectrum, UnitFormForOptionsBasic, UnitOptions, UnitCommon, Forms,
Controls, ExtCtrls, Graphics, StdCtrls, Dialogs, Buttons, LCLType, LCLIntf,
LazUTF8;
type
TFrameColourPalette = class(TFrame)
BitBtn1: TBitBtn;
BitBtn2: TBitBtn;
BitBtn3: TBitBtn;
ColorDialog1: TColorDialog;
ComboBoxCustom: TComboBox;
ComboBoxPredefined: TComboBox;
Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
Panel1: TPanel;
Panel2: TPanel;
Panel3: TPanel;
Panel4: TPanel;
Panel5: TPanel;
Panel6: TPanel;
procedure BitBtn1Click(Sender: TObject);
procedure BitBtn2Click(Sender: TObject);
procedure BitBtn3Click(Sender: TObject);
procedure ComboBoxCustomChange(Sender: TObject);
procedure ComboBoxPredefinedChange(Sender: TObject);
strict private
type
TPan = class(TCustomControl)
public
property ParentFont;
end;
TColourArea = class(TGraphicControl)
private
DisplayText: String;
TextStyle: TTextStyle;
protected
procedure SetColor(Value: TColor); override;
procedure MouseEnter; override;
procedure MouseLeave; override;
public
constructor Create(AOwner: TComponent); override;
procedure Paint; override;
property ParentColor default False;
property Color nodefault;
end;
TObjColoursMap = class(TObject)
public
LCLColourMap: TLCLColourMap;
end;
strict private
ColourPanels: Array[0..15] of TColourArea;
LabColour: Array [0..7] of TLabel;
function GetLCLColours: TLCLColourMap;
procedure SetLCLColours(AValue: TLCLColourMap);
procedure SetLCLColour(AColour: TColor; ABright: Boolean; ASpectrumColourIndex: Integer);
procedure CAClick(Sender: TObject);
procedure FillPredefinedPalettes;
procedure FillCustomPalettes;
procedure SaveCustomPalettes;
procedure ClearCombo(CB: TCustomComboBox);
procedure SwitchToCB(CBFrom, CBTo: TCustomComboBox);
procedure FillColourMapFromColourPanels(var CM: TLCLColourMap);
procedure InternalAdd(N: Integer; const S: String);
procedure NewPalette;
procedure FormCloseCallback(Sender: TObject; var {%H-}CloseAction: TCloseAction);
public
constructor Create(TheOwner: TComponent); override;
destructor Destroy; override;
class function PickColours(var AColours: TLCLColourMap): Boolean;
class function CreateForOptionsDialog(AOptionsDialog: TFormOptions): TFrameColourPalette;
property LCLColours: TLCLColourMap read GetLCLColours write SetLCLColours;
end;
implementation
{$R *.lfm}
{ TFrameColourPalette.TColourArea }
procedure TFrameColourPalette.TColourArea.SetColor(Value: TColor);
var
R, G, B: Integer;
begin
if Value = Color then
Exit;
// We don't allow system colours here.
if Value = clDefault then
Value := GetDefaultColor(TDefaultColorType.dctBrush);
Value := ColorToRGB(Value);
R := Red(Value);
G := Green(Value);
B := Blue(Value);
DisplayText := Format('RGB:%3:s%0:s%4:s%1:s%4:s%2:s',
[IntToHex(R, 2), IntToHex(G, 2), IntToHex(B, 2), TCommonFunctions.NonBreakSpace,
TCommonFunctions.NarrowNonBreakSpace]);
Font.Color := TCommonFunctionsLCL.GetBestContrastColorForFont(R, G, B);
inherited SetColor(Value);
end;
procedure TFrameColourPalette.TColourArea.MouseEnter;
begin
inherited MouseEnter;
Invalidate;
end;
procedure TFrameColourPalette.TColourArea.MouseLeave;
begin
inherited MouseLeave;
Invalidate;
end;
constructor TFrameColourPalette.TColourArea.Create(AOwner: TComponent);
begin
DisplayText := '';
inherited Create(AOwner);
ParentColor := False;
Color := GetRGBColorResolvingParent;
TextStyle := Canvas.TextStyle;
TextStyle.Alignment := taCenter;
TextStyle.Layout := tlCenter;
TextStyle.Opaque := False;
TextStyle.Wordbreak := False;
TextStyle.SystemFont := False;
TextStyle.RightToLeft := False;
Cursor := crHandPoint;
end;
procedure TFrameColourPalette.TColourArea.Paint;
procedure DrawRect(const R: TRect; AndFill: Boolean);
var
Points: Array of TPoint;
begin
Points := [
R.TopLeft, Point(R.Right, R.Top), R.BottomRight,
Point(R.Left, R.Bottom)
, R.TopLeft
];
if AndFill then
Canvas.Polygon(Points, True, 1)
else
Canvas.Polyline(Points);
end;
var
R: TRect;
begin
inherited Paint;
R := Rect(0, 0, ClientWidth - 1, ClientHeight - 1);
Canvas.Brush.Color := Color;
Canvas.Pen.Color := clBlack;
DrawRect(R, True);
if MouseInClient then begin
R.Inflate(-2, -2);
Canvas.Pen.Color := Font.Color;
DrawRect(R, False);
end;
Canvas.TextRect(Self.ClientRect, 0, 0, DisplayText, TextStyle);
end;
{ TFrameColourPalette }
procedure TFrameColourPalette.SetLCLColours(AValue: TLCLColourMap);
var
I: Integer;
begin
AValue.Name := UTF8Trim(AValue.Name);
I := ComboBoxPredefined.Items.IndexOf(AValue.Name);
if I >= 0 then begin
ComboBoxPredefined.ItemIndex := I;
SwitchToCB(ComboBoxCustom, ComboBoxPredefined);
end else begin
I := ComboBoxCustom.Items.IndexOf(AValue.Name);
if I >= 0 then begin
ComboBoxCustom.ItemIndex := I;
SwitchToCB(ComboBoxPredefined, ComboBoxCustom);
end else begin
ComboBoxPredefined.ItemIndex := -1;
ComboBoxCustom.ItemIndex := -1;
for I := Low(ColourPanels) to High(ColourPanels) do
ColourPanels[I].Color := AValue.Colours[I > 7, I mod 8];
end;
end;
end;
procedure TFrameColourPalette.NewPalette;
var
S: String;
N: Integer;
begin
S := '';
if InputQuery('New colour palette', 'Name:', S) then begin
S := UTF8Trim(S);
if S <> '' then begin
N := ComboBoxPredefined.Items.IndexOf(S);
if N >= 0 then begin
MessageDlg(
Format('"%s" is a predefined palette name.%sIt cannot be used as a custom palette name.',
[ComboBoxPredefined.Items.Strings[N], LineEnding])
, mtError, [mbClose], 0)
end else begin
N := ComboBoxCustom.Items.IndexOf(S);
if (N < 0) or
(MessageDlg(
Format('"%s" is an already used palette name.%sDo you want to overwrite this palette?',
[ComboBoxCustom.Items.Strings[N], LineEnding])
, mtConfirmation, [mbYes, mbNo], 0) = mrYes)
then begin
InternalAdd(N, S);
end;
end;
end;
end;
end;
procedure TFrameColourPalette.FormCloseCallback(Sender: TObject;
var CloseAction: TCloseAction);
begin
Application.RemoveAsyncCalls(Self);
if Sender is TCustomForm then begin
if TCustomForm(Sender).ModalResult = mrOK then begin
SaveCustomPalettes;
end;
end;
end;
procedure TFrameColourPalette.BitBtn1Click(Sender: TObject);
begin
NewPalette;
end;
procedure TFrameColourPalette.BitBtn2Click(Sender: TObject);
var
N: Integer;
S: String;
begin
N := ComboBoxCustom.ItemIndex;
if N < 0 then begin
N := ComboBoxPredefined.ItemIndex;
if N >= 0 then begin
S := 'Currently chosen palette "' + ComboBoxPredefined.Items.Strings[N] + '" is a predefined palette.'
+ LineEnding + 'It cannot be removed, only custom palettes can be removed.';
end else begin
S := 'Current palette is not saved. There is nothing to delete.';
end;
MessageDlg(S, mtInformation, [mbClose], 0);
end else begin
if MessageDlg(Format('Delete palette "%s"?', [ComboBoxCustom.Items.Strings[N]]), mtConfirmation, [mbYes, mbNo], 0) = mrYes then begin
ComboBoxCustom.Items.Objects[N].Free;
ComboBoxCustom.Items.Objects[N] := nil;
ComboBoxCustom.Items.Delete(N);
ComboBoxCustom.ItemIndex := -1;
end;
end;
end;
procedure TFrameColourPalette.BitBtn3Click(Sender: TObject);
var
ColourMap: TLCLColourMap;
ColoursArr: TLCLColours;
S: String;
begin
ColourMap := GetLCLColours;
if IsBW(ColourMap) then begin
S := UTF8Trim(ColourMap.Name);
if S <> '' then
S := ' "' + S + '"';
MessageDlg('Current colour palette' + S + ' is already a black and white pallete.',
mtInformation, [mbClose], 0);
end else begin
ColourMap.Name := '';
ColoursArr := ColourMap.Colours;
ConvertToBW(ColoursArr, ColourMap.Colours);
SetLCLColours(ColourMap);
end;
end;
procedure TFrameColourPalette.ComboBoxCustomChange(Sender: TObject);
begin
SwitchToCB(ComboBoxPredefined, ComboBoxCustom);
end;
procedure TFrameColourPalette.ComboBoxPredefinedChange(Sender: TObject);
begin
SwitchToCB(ComboBoxCustom, ComboBoxPredefined);
end;
function TFrameColourPalette.GetLCLColours: TLCLColourMap;
begin
if ComboBoxCustom.ItemIndex >= 0 then
Result := (ComboBoxCustom.Items.Objects[ComboBoxCustom.ItemIndex] as TObjColoursMap).LCLColourMap
else if ComboBoxPredefined.ItemIndex >= 0 then
Result := (ComboBoxPredefined.Items.Objects[ComboBoxPredefined.ItemIndex] as TObjColoursMap).LCLColourMap
else begin
FillColourMapFromColourPanels(Result);
Result.Name := '';
end;
end;
procedure TFrameColourPalette.SetLCLColour(AColour: TColor; ABright: Boolean;
ASpectrumColourIndex: Integer);
var
J: Integer;
begin
J := ASpectrumColourIndex mod 8;
if ABright then
J := J + 8;
ColourPanels[J].Color := AColour;
end;
procedure TFrameColourPalette.CAClick(Sender: TObject);
var
CA: TColourArea;
S: String;
begin
if Sender is TColourArea then begin
CA := TColourArea(Sender);
if CA.Tag > 7 then
S := ' bright'
else
S := '';
S := Format('Spectrum colour%s %s', [S, TCommonSpectrum.SpectrumColourNames[CA.Tag mod 8]]);
ColorDialog1.Title := S;
ColorDialog1.Color := CA.Color;
if ColorDialog1.Execute then begin
if CA.Color <> ColorDialog1.Color then begin
CA.Color := ColorDialog1.Color;
ComboBoxCustom.ItemIndex := -1;
ComboBoxPredefined.ItemIndex := -1;
Invalidate;
end;
end;
end;
end;
procedure TFrameColourPalette.FillPredefinedPalettes;
var
C: TObjColoursMap;
begin
ClearCombo(ComboBoxPredefined);
C := TObjColoursMap.Create;
UnitSpectrumColourMap.GetDefaultSpectrumColoursD7(C.LCLColourMap);
ComboBoxPredefined.Items.AddObject(C.LCLColourMap.Name, C);
C := TObjColoursMap.Create;
UnitSpectrumColourMap.GetDefaultSpectrumColoursC0(C.LCLColourMap);
ComboBoxPredefined.Items.AddObject(C.LCLColourMap.Name, C);
C := TObjColoursMap.Create;
UnitSpectrumColourMap.GetBlackWhiteSpectrumColours(C.LCLColourMap);
ComboBoxPredefined.Items.AddObject(C.LCLColourMap.Name, C);
end;
procedure TFrameColourPalette.FillCustomPalettes;
var
C: TObjColoursMap;
CC: TLCLColourMapArray;
I: Integer;
begin
ClearCombo(ComboBoxCustom);
GetColourMaps(CC);
for I := 0 to High(CC) do begin
C := TObjColoursMap.Create;
C.LCLColourMap := CC[I];
ComboBoxCustom.Items.AddObject(C.LCLColourMap.Name, C);
end;
end;
procedure TFrameColourPalette.SaveCustomPalettes;
var
Obj: TObject;
CC: TLCLColourMapArray;
J, I: Integer;
begin
SetLength(CC{%H-}, ComboBoxCustom.Items.Count);
J := 0;
for I := 0 to ComboBoxCustom.Items.Count - 1 do begin
Obj := ComboBoxCustom.Items.Objects[I];
if Obj is TObjColoursMap then begin
CC[J] := TObjColoursMap(Obj).LCLColourMap;
Inc(J);
end;
end;
SetLength(CC, J);
SetColourMaps(CC);
end;
procedure TFrameColourPalette.ClearCombo(CB: TCustomComboBox);
var
I: Integer;
begin
for I := 0 to CB.Items.Count - 1 do begin
CB.Items.Objects[I].Free;
CB.Items.Objects[I] := nil;
end;
CB.Clear;
end;
procedure TFrameColourPalette.SwitchToCB(CBFrom, CBTo: TCustomComboBox);
var
O: TObject;
CM: TLCLColourMap;
I: Integer;
begin
if CBTo.ItemIndex >= 0 then begin
CBFrom.ItemIndex := -1;
O := CBTo.Items.Objects[CBTo.ItemIndex];
if O is TObjColoursMap then begin
CM := TObjColoursMap(O).LCLColourMap;
for I := Low(ColourPanels) to High(ColourPanels) do
ColourPanels[I].Color := CM.Colours[I > 7, I mod 8];
end;
end;
end;
procedure TFrameColourPalette.FillColourMapFromColourPanels(
var CM: TLCLColourMap);
var
B: Boolean;
I, J: Integer;
begin
for B := False to True do begin
for I := 0 to 7 do begin
if B then
J := I + 8
else
J := I;
CM.Colours[B, I] := ColourPanels[J].Color;
end;
end;
end;
procedure TFrameColourPalette.InternalAdd(N: Integer; const S: String);
var
C: TObjColoursMap;
begin
C := TObjColoursMap.Create;
FillColourMapFromColourPanels(C.LCLColourMap);
C.LCLColourMap.Name := S;
if N >= 0 then begin
ComboBoxCustom.Items.Objects[N].Free;
ComboBoxCustom.Items.Objects[N] := nil;
ComboBoxCustom.Items.Delete(N);
end else
N := ComboBoxCustom.Items.Count;
ComboBoxPredefined.ItemIndex := -1;
ComboBoxCustom.Items.InsertObject(N, S, C);
ComboBoxCustom.ItemIndex := N;
end;
constructor TFrameColourPalette.Create(TheOwner: TComponent);
var
Pan: TPan;
F: TFont;
CA: TColourArea;
procedure CalculateBoxSizes(var W, H: Integer);
var
Sz: TSize;
begin
try
CommonFunctionsLCL.TCommonFunctionsLCL.CalculateTextSize(F, ' RGB: WW WW WW ', Sz);
if W < Sz.cx then
W := Sz.cx;
if H < Sz.cy then
H := Sz.cy;
except
end;
end;
const
W0: Integer = 50;
H0: Integer = 31;
var
B: Boolean;
J, I: Integer;
W, H, SpcW, SpcH: Integer;
C0: TControl;
Lab, Lab2: TLabel;
FD: TFontData;
begin
inherited Create(TheOwner);
ComboBoxCustom.Items.UseLocale := True;
ComboBoxPredefined.Items.UseLocale := ComboBoxCustom.Items.UseLocale;
if ComboBoxCustom.Items is TStringList then
TStringList(ComboBoxCustom.Items).CaseSensitive := False;
if ComboBoxPredefined.Items is TStringList then
TStringList(ComboBoxPredefined.Items).CaseSensitive := False;
Label3.Font.Style := Label3.Font.Style + [fsUnderline];
Caption := 'Spectrum colour palette';
Panel1.BevelOuter := bvNone;
Pan := TPan.Create(Panel1);
Pan.Anchors := [];
F := nil;
try
C0 := nil;
for B := True downto False do begin
for I := 0 to 7 do begin
if B then
J := I + 8
else
J := I;
Lab2 := nil;
CA := TColourArea.Create(Pan);
ColourPanels[J] := CA;
CA.AutoSize := False;
CA.Tag := J;
CA.OnClick := @CAClick;
CA.ParentFont := False;
if F = nil then begin
F := TFont.Create;
F.Assign(CA.Font);
FD := GetFontData(F.Handle);
F.BeginUpdate;
try
F.Name := FD.Name;
F.Style := F.Style + [fsBold];
finally
F.EndUpdate;
end;
W := W0;
H := H0;
CalculateBoxSizes(W, H);
SpcW := W div 10;
SpcH := H div 10;
end;
CA.Font.Assign(F);
CA.Width := W;
CA.Anchors := [];
if not B then begin
C0 := ColourPanels[I + 8];
CA.AnchorToNeighbour(akRight, SpcW, C0);
CA.AnchorParallel(akTop, 0, C0);
CA.AnchorParallel(akBottom, 0, C0);
Lab := TLabel.Create(Pan);
LabColour[I] := Lab;
Lab.Anchors := [];
Lab.AnchorVerticalCenterTo(CA);
Lab.AnchorToNeighbour(akRight, 4, CA);
Lab.Caption := TCommonSpectrum.SpectrumColourNames[I] + ':';
Lab.AutoSize := True;
Lab.Parent := Pan;
if I = 0 then begin
Lab2 := TLabel.Create(Pan);
Lab2.Caption := 'normal';
Lab2.Anchors := [];
Lab2.AnchorToNeighbour(akRight, (SpcW + 1) div 2, C0);
end;
end else begin
CA.Height := H;
CA.AnchorParallel(akRight, 0, Pan);
if C0 = nil then begin
Lab2 := TLabel.Create(Pan);
Lab2.Caption := 'bright';
Lab2.Anchors := [];
C0 := Lab2;
end;
CA.AnchorToNeighbour(akTop, SpcH, C0);
C0 := CA;
end;
if Assigned(Lab2) then begin
Lab2.AnchorParallel(akTop, 0, Pan);
Lab2.AnchorParallel(akLeft, 0, CA);
Lab2.Parent := Pan;
end;
CA.Parent := Pan;
end;
end;
finally
F.Free;
end;
Pan.AnchorParallel(akTop, 0, Panel1);
Pan.AnchorParallel(akRight, 0, Panel1);
Pan.BorderSpacing.Around := SpcW;
Pan.AutoSize := True;
Panel6.Anchors := [];
Panel6.AnchorToNeighbour(akTop, 0, Pan);
Panel6.AnchorParallel(akRight, 0, Pan);
Pan.Parent := Panel1;
Pan.ParentFont := True;
Panel1.AutoSize := True;
FillPredefinedPalettes;
FillCustomPalettes;
Panel4.Constraints.MinWidth := Panel4.Width;
ShowHint := True;
Self.AutoSize := True;
end;
destructor TFrameColourPalette.Destroy;
begin
Application.RemoveAsyncCalls(Self);
Screen.RemoveAllHandlersOfObject(Self);
ClearCombo(ComboBoxCustom);
ClearCombo(ComboBoxPredefined);
inherited Destroy;
end;
class function TFrameColourPalette.PickColours(var AColours: TLCLColourMap
): Boolean;
var
F: TCustomForm;
Fm: TFrameColourPalette;
begin
Result := False;
Fm := TFrameColourPalette.Create(nil);
try
F := UnitFormForOptionsBasic.TFormForOptionsBasic.CreateForControl(nil, Fm, False);
try
F.AddHandlerClose(@Fm.FormCloseCallback);
F.BorderStyle := bsSingle;
Fm.SetLCLColours(AColours);
if F.ShowModal = mrOK then begin
AColours := Fm.GetLCLColours;
Result := True;
end;
finally
F.Free;
end;
finally
Fm.Free;
end;
end;
class function TFrameColourPalette.CreateForOptionsDialog(
AOptionsDialog: TFormOptions): TFrameColourPalette;
var
Fm: TFrameColourPalette;
begin
Result := nil;
if Assigned(AOptionsDialog) then begin
Fm := TFrameColourPalette.Create(AOptionsDialog);
try
AOptionsDialog.AddHandlerClose(@Fm.FormCloseCallback);
AOptionsDialog.AddAnOptionControl(Fm, 'Spectrum colours');
Result := Fm;
except
FreeAndNil(Fm);
end;
end;
end;
end.