{
********************************************************************************

SPackGui (common files)
Copyright (C) 2009-2013 Geoffray Levasseur <geoffray.levasseurbrandin@numericable.fr>.
Copyright (C) <date> <add your name and mail address here>

http://0.tuxfamilly.org/
http://www.geoffray-levasseur.org/

This software is governed by the CeCILL license under French law and
abiding by the rules of distribution of free software.  You can  use,
modify and/ or redistribute the software under the terms of the CeCILL
license as circulated by CEA, CNRS and INRIA at the following URL
"http://www.cecill.info".

As a counterpart to the access to the source code and  rights to copy,
modify and redistribute granted by the license, users are provided only
with a limited warranty  and the software's author,  the holder of the
economic rights,  and the successive licensors  have only  limited
liability.

In this respect, the user's attention is drawn to the risks associated
with loading,  using,  modifying and/or developing or reproducing the
software by the user in light of its specific status of free software,
that may mean  that it is complicated to manipulate,  and  that  also
therefore means  that it is reserved for developers  and  experienced
professionals having in-depth computer knowledge. Users are therefore
encouraged to load and test the software's suitability as regards their
requirements in conditions enabling the security of their systems and/or
data to be ensured and,  more generally, to use and operate it in the
same conditions as regards security.

The fact that you are presently reading this means that you have had
knowledge of the CeCILL license and that you accept its terms.

********************************************************************************

Description:
  Icons "on the fly" manager

********************************************************************************
}

unit uIconManager;

{$include defines.inc}

interface

uses
  Controls, Classes, SysUtils, Forms, Graphics;

const
  DefaultButtonIcon = 'dialog-cancel.png';
  NumberOfIcons = 49;

  //the following is actual freedesktop standard :
  NewIconNames: array[0..NumberOfIcons - 1] of string =
    ('document-new.png',            'document-new-from-template.png', //0
    'document-open.png',            'view-refresh.png',               //2
    'document-save.png',            'document-save-all.png',          //4
    'dialog-close.png',             'document-print.png',             //6
    'document-preview.png',         'application-exit.png',           //8
    'document-print-preview.png',   'edit-undo.png',                  //10
    'edit-redo.png',                'edit-cut.png',                   //12
    'edit-copy.png',                'edit-paste.png',                 //14
    'preferences-system-time.png',  'insert-text.png',                //16
    'mail-send.png',                'document-save-as.png',           //18
    'document-export.png',          'document-open-recent.png',       //20
    'dialog-ok.png',                'dialog-cancel.png',              //22
    'dialog-ok-apply.png',          'dialog-close.png',               //24
    'help-about.png',               'edit-find.png',                  //26
    'go-next.png',                  'go-previous.png',                //28
    'go-jump.png',                  'help-contents.png',              //30
    'edit-clear.png',               'applications-system.png',        //32
    'configure.png',                'help-hint.png',                  //34
    'list-add.png',                 'list-remove.png',                //36
    'im-status-message-edit.png',   'arrow-down.png',                 //38
    'arrow-up.png',                 'media-playback-pause.png',       //40
    'document-properties.png',      'edit-select-all.png',            //42
    'video-display.png',            'tools-report-bug.png',           //44
    'help-contents.png',            'repository.png',                 //46
    'preferences-desktop-font.png');

//this is more easy than learning icon's index
const
  icClose = 6;
  icCancel = 23;
  icYes = 22;
  icNo = 6;
  icOk = 22;
  icApply = 24;
  icNew = 0;
  icOpen = 2;
  icSave = 4;
  icSaveAll = 5;
  icExit = 9;
  icUndo = 11;
  icRedo = 12;
  icCopy = 14;
  icCut = 13;
  icPaste = 15;
  icRefresh = 3;
  icAbout = 26;
  icSearch = 27;
  icAdd = 36;
  icChange = 38;
  icRemove = 37;
  icDelete = icRemove;
  icUp = 34;
  icDown = 39;
  icSystem = 33;
  icProperties = 42;
  icSettings = 34;
  icParameters = icSettings;
  icPause = 41;
  icDisplay = 44;
  icSelectAll = 43;
  icReportBug = 45;
  icManual = 46;
  icRepository = 47;
  icFontSettings = 48;

var
  ilDefault: TImageList;

//load a new theme and apply the changes
procedure LoadIconSet(Path: string);

//set button icons on the fly
procedure InitBtnGlyphs(Form: TForm);

//for color configuration create an icon on the fly showing the selected color
function CreateColorGlyph(Color: TColor; Width, Height: integer): TBitmap;

implementation

uses
  Dialogs, Buttons, uUtils, uDebug;

function CreateColorGlyph(Color: TColor; Width, Height: integer): TBitmap;
var
  X, Y: integer;
begin
  //create an empty bitmap and set its size
  Result := TBitmap.Create;
  Result.SetSize(Width, Height);
  //fill it with the given color
  for X := 0 to Width do
    for Y := 0 to Height do
      Result.Canvas.Pixels[X, Y] := Color;
end;

function AddIcon(Index: Integer; Path: string): Boolean;
var
  Bitmap: TPortableNetworkGraphic;
  X, Y: integer;
begin
  PrintDbg('i Add icon "' + Path + NewIconNames[Index] + '"... ', vlHigh);
  //only png format is supported
  try
    Result := True;
    try
      Bitmap := TPortableNetworkGraphic.Create;
      if not FileExists(Path + NewIconNames[Index]) then //the icon is not present
      begin
        //we have to create an empty bitmap (and hopping it's gonna be seen as all transparent)
        PrintDbg('not fount, create empty one: ', vlHigh);
        Bitmap.SetSize(ilDefault.Width, ilDefault.Height);
        for X := 0 to ilDefault.Width do
          for Y := 0 to ilDefault.Height do
            //actually this draw a boxed X
            if (X = Y) or (ilDefault.Width - X = Y + 1) or (X = 0) or (Y = 0) or
              (X = ilDefault.Width - 1) or (Y = ilDefault.Height - 1) then
                Bitmap.Canvas.Pixels[X, Y] := clBtnText
              else
                Bitmap.Canvas.Pixels[X, Y] := clBtnFace;
        //set transparancy settings
        Bitmap.TransparentColor := clBtnFace;
        Bitmap.Transparent := True;
      end else
      begin
        //load the bitmap and set transparency on
        Bitmap.LoadFromFile(Path + NewIconNames[Index]);
        Bitmap.Transparent := True;
      end;
      //add this to the image list
      ilDefault.Add(Bitmap, nil);
    except
      Result := False;
    end;
  finally
    Bitmap.Free;
  end;
  PrintDbgResult(Result, vlHigh)
end;

procedure LoadIconSet(Path: string);
var
  IconBaseDir: string;
  I: Integer;
begin
  IconBaseDir := Path;
  if IconBaseDir[Length(IconBaseDir)] <> DirectorySeparator then
    IconBaseDir := IconBaseDir + DirectorySeparator;
  //check iconset existance
  if not DirectoryExists(IconBaseDir) then
  begin
    //if unavailable rolling back to Oxygen
    PrintLnDbg('E uIconManager.LoadIconSet: "' + IconBaseDir +
      '" directory does not exists!', vlHigh);
    PrintLnDbg('W uIconManager.LoadIconSet: The application ' +
      'may look uggly but should be usable.', vlHigh);
  end;
  try
    //free the image list to be sure it'll not poluted with previous datas
    ilDefault.Free;
  finally
    //create an image liste with the good size
    ilDefault := TImageList.CreateSize(22, 22);
  end;
  PrintLnDbg('i Initializing icon set done.', vlHigh);
  //add the icons in the newly created image list
  for I:= 0 to NumberOfIcons - 1 do
    AddIcon(I, IconBaseDir);
end;

procedure InitBtnGlyphs(Form: TForm);
var
  I: integer;
  Bitmap: TBitmap;
begin
  for I := 0 to Form.ComponentCount - 1 do
    if (Form.Components[I] is TBitBtn) and (Form.Components[I].Tag <> -1) then
    try
      PrintDbg('i Init "' + Form.Components[I].Name + '" button glyph... ',
        vlHigh);
      Bitmap := TBitmap.Create;
      ilDefault.GetBitmap((Form.Components[I] as TBitBtn).Tag, Bitmap);
      (Form.Components[I] as TBitBtn).Glyph := Bitmap;
      PrintDbgResult(True, vlHigh);
    except
      PrintDbgResult(False, vlHigh);
    end;
end;

initialization

end.