From 0ce984580945702cb50f17cc7a4cfeeb99ce109f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C3=ABl=20Van=20Canneyt?= <michael@freepascal.org>
Date: Mon, 17 Feb 2025 11:23:04 +0100
Subject: [PATCH] * Example from Margers from merge request !953

---
 packages/fv/examples/colorselonly.pp | 172 +++++++++++++++++++++++++++
 1 file changed, 172 insertions(+)
 create mode 100644 packages/fv/examples/colorselonly.pp

diff --git a/packages/fv/examples/colorselonly.pp b/packages/fv/examples/colorselonly.pp
new file mode 100644
index 0000000000..faacd19b31
--- /dev/null
+++ b/packages/fv/examples/colorselonly.pp
@@ -0,0 +1,172 @@
+program onlycolorsel;
+uses
+  Objects, Drivers, Views, Menus, Dialogs, App, ColorSel;
+
+const cmColors =12828;
+      cmCreateSave = 31991;
+      cmLoadColors =23467;
+
+type
+  PColorApp = ^TColorApp;
+  TColorApp = object(TApplication)
+    constructor Init;
+    function GetPalette: PPalette; virtual;
+    procedure HandleEvent(var Event: TEvent); virtual;
+    procedure InitMenuBar; virtual;
+  end;
+
+procedure TutorStreamError(var S: TStream);
+var ErrorMessage: String;
+begin
+  case S.Status of
+    stError: ErrorMessage := 'Stream access error';
+    stInitError: ErrorMessage := 'Cannot initialize stream';
+    stReadError: ErrorMessage := 'Read beyond end of stream';
+    stWriteError: ErrorMessage := 'Cannot expand stream';
+    stGetError: ErrorMessage := 'Unregistered type read from stream';
+    stPutError: ErrorMessage :='Unregistered type written to stream';
+  end;
+  ClearScreen;
+
+  PrintStr('Error: ' + ErrorMessage);
+  readln;
+  Halt(Abs(S.Status));
+end;
+
+constructor TColorApp.Init;
+begin
+  StreamError := @TutorStreamError;
+  RegisterObjects;
+  RegisterViews;
+  RegisterDialogs;
+  RegisterApp;
+  RegisterColorsel;
+  inherited Init;
+end;
+
+function TColorApp.GetPalette: PPalette;
+const
+  CNewColor = CAppColor ;
+  CNewBlackWhite = CAppBlackWhite ;
+  CNewMonochrome = CAppMonochrome ;
+  P: array[apColor..apMonochrome] of string[Length(CNewColor)] =
+    (CNewColor, CNewBlackWhite, CNewMonochrome);
+begin
+  GetPalette := @P[AppPalette];
+end;
+
+procedure TColorApp.InitMenuBar;
+var
+  R: TRect;
+begin
+  GetExtent(R);
+  R.B.Y := R.A.Y + 1;
+  MenuBar := New(PMenubar, Init(R, NewMenu(NewSubMenu('~M~enu',  hcNoContext,
+    NewMenu(
+    NewItem('Color ~T~est', 'F2', kbF2, cmColors, hcNoContext,
+    NewItem('Color ~S~ave', 'F4', kbF4, cmCreateSave, hcNoContext,
+    NewItem('Color ~L~oad', 'F6', kbF6, cmLoadColors, hcNoContext,
+    nil)))),
+    nil))));
+end;
+
+procedure TColorApp.HandleEvent(var Event: TEvent);
+
+procedure Colors;
+var
+  R: TRect;
+  D: PDialog;
+begin
+  D := New(PColorDialog, Init('',
+    ColorGroup('Desktop',       DesktopColorItems(nil),
+    ColorGroup('Menus',         MenuColorItems(nil),
+    ColorGroup('Dialogs',       DialogColorItems(dpGrayDialog, nil),
+    ColorGroup('Editor',        WindowColorItems(wpBlueWindow, nil),
+    ColorGroup('Ascii table',   WindowColorItems(wpGrayWindow, nil),
+    ColorGroup('Calendar',
+      WindowColorItems(wpCyanWindow,
+      ColorItem('Current day',       22, nil)),
+      nil))))))));
+
+  if ExecuteDialog(D, Application^.GetPalette) <> cmCancel then
+  begin
+    ReDraw;
+  end;
+end;
+
+procedure ColorsSave;
+var
+  R: TRect;
+  D: PDialog;
+var DesktopFile: TBufStream;
+begin
+  D := New(PColorDialog, Init('',
+    ColorGroup('Desktop',       DesktopColorItems(nil),
+    ColorGroup('Menus',         MenuColorItems(nil),
+    ColorGroup('Dialogs',       DialogColorItems(dpGrayDialog, nil),
+    ColorGroup('Editor',        WindowColorItems(wpBlueWindow, nil),
+    ColorGroup('Ascii table',   WindowColorItems(wpGrayWindow, nil),
+    ColorGroup('Calendar',
+      WindowColorItems(wpCyanWindow,
+      ColorItem('Current day',       22, nil)),
+      nil))))))));
+
+  DesktopFile.Init('DESKTOP.TUT', stCreate, 1024);
+  DesktopFile.Put(D);
+  DesktopFile.Done;
+
+  Dispose(D,Done);
+end;
+
+procedure ColorsLoad;
+var
+  R: TRect;
+  D: PDialog;
+  p1, p2, p3 ,p4 : pointer;
+var DesktopFile: TBufStream;
+begin
+  getmem(p1,50); {make some memory offset so load is in different pointers}
+  getMem(p2,100);
+  getMem(p3,30);
+  getMem(p4,150);
+  DesktopFile.Init('DESKTOP.TUT', stOpenRead, 1024);
+  D:=PDialog(DesktopFile.Get);
+  DesktopFile.Done;
+
+  freemem(p1,50);
+  freeMem(p2,100);
+  freeMem(p3,30);
+  freeMem(p4,150);
+
+  if assigned(D) then
+  if ExecuteDialog(D, Application^.GetPalette) <> cmCancel then
+  begin
+    ReDraw;
+  end;
+end;
+
+begin
+  inherited HandleEvent(Event);
+  case Event.What of
+    evCommand:
+      begin
+        case Event.Command of
+          cmColors: Colors;
+          cmCreateSave:ColorsSave;
+          cmLoadColors:ColorsLoad;
+        else
+          Exit;
+        end;
+        ClearEvent(Event);
+      end;
+  end;
+end;
+
+var
+  ColorApp: TColorApp;
+begin
+  ColorApp.Init;
+  ColorApp.Run;
+  ColorApp.Done;
+end.
+