1

!define APPNAME "OpenTTD"   ; Define application name

     2

!define APPVERSION "0.5.1"  ; Define application version

     4

     5

!define APPURLLINK "http://www.openttd.org"

     6

!define APPNAMEANDVERSION "${APPNAME} ${APPVERSION}"

     7

!define APPVERSIONINTERNAL "${APPVERSION}.0" ; Needs to be of the format X.X.X.X

     8

     9

!define MUI_ICON "..\..\..\openttd.ico"

    10

!define MUI_UNICON "..\..\..\openttd.ico"

    11

!define MUI_WELCOMEFINISHPAGE_BITMAP "welcome.bmp"

    12

!define MUI_HEADERIMAGE

    13

!define MUI_HEADERIMAGE_BITMAP "top.bmp"

    14

    15

BrandingText "OpenTTD Installer"

    16

SetCompressor LZMA

    17

    18

; Version Info

    19

Var AddWinPrePopulate

    20

VIProductVersion "${APPVERSIONINTERNAL}"

    21

VIAddVersionKey "ProductName" "OpenTTD Installer"

    22

VIAddVersionKey "Comments" "Installs ${APPNAMEANDVERSION}"

    23

VIAddVersionKey "CompanyName" "OpenTTD Developers"

    24

VIAddVersionKey "FileDescription" "Installs ${APPNAMEANDVERSION}"

    25

VIAddVersionKey "ProductVersion" "${APPVERSION}"

    26

VIAddVersionKey "InternalName" "InstOpenTTD"

    27

VIAddVersionKey "FileVersion" "${APPVERSION}"

    28

VIAddVersionKey "LegalCopyright" " "

    29

; Main Install settings

    30

Name "${APPNAMEANDVERSION}"

    31

    32

; NOTE: Keep trailing backslash!

    33

InstallDir "$PROGRAMFILES\OpenTTD\"

    34

InstallDirRegKey HKLM "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "Install Folder"

    35

OutFile "openttd-${APPVERSION}-win32.exe"

    36

CRCCheck force

    37

    38

ShowInstDetails show

    39

ShowUninstDetails show

    40

    41

Var SHORTCUTS

    42

Var CDDRIVE

    43

    44

; Modern interface settings

    45

!include "MUI.nsh"

    46

    47

!define MUI_ABORTWARNING

    48

    49

!insertmacro MUI_PAGE_WELCOME

    50

    51

!define MUI_LICENSEPAGE_RADIOBUTTONS

    52

!insertmacro MUI_DEFAULT MUI_LICENSEPAGE_RADIOBUTTONS_TEXT_ACCEPT "I &accept this agreement"

    53

!insertmacro MUI_DEFAULT MUI_LICENSEPAGE_RADIOBUTTONS_TEXT_DECLINE "I &do not accept this agreement"

    54

!insertmacro MUI_PAGE_LICENSE "..\..\..\COPYING"

    55

    56

!insertmacro MUI_PAGE_COMPONENTS

    57

    58

;---------------------------------

    59

; Custom page for finding TTDLX CD

    60

Page custom SelectCDEnter SelectCDExit ": TTD folder"

    61

    62

!insertmacro MUI_PAGE_DIRECTORY

    63

    64

;Start Menu Folder Page Configuration

    65

!define MUI_STARTMENUPAGE_DEFAULTFOLDER $SHORTCUTS

    66

!define MUI_STARTMENUPAGE_REGISTRY_ROOT "HKEY_LOCAL_MACHINE"

    67

!define MUI_STARTMENUPAGE_REGISTRY_KEY "Software\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD"

    68

!define MUI_STARTMENUPAGE_REGISTRY_VALUENAME "Shortcut Folder"

    69

    70

!insertmacro MUI_PAGE_STARTMENU "OpenTTD" $SHORTCUTS

    71

    72

!insertmacro MUI_PAGE_INSTFILES

    73

    74

;-----------------------------------------------------

    75

; New custom page to show UNICODE and MSLU information

    76

Page custom ShowWarningsPage

    77

    78

!define MUI_FINISHPAGE_RUN "$INSTDIR\openttd.exe"

    79

!define MUI_FINISHPAGE_LINK "Visit the OpenTTD site for latest news, FAQs and downloads"

    80

!define MUI_FINISHPAGE_LINK_LOCATION "${APPURLLINK}"

    81

!define MUI_FINISHPAGE_NOREBOOTSUPPORT

    82

!define MUI_FINISHPAGE_SHOWREADME "$INSTDIR\readme.txt"

    83

!define MUI_FINISHPAGE_SHOWREADME_NOTCHECKED

    84

    85

!insertmacro MUI_PAGE_FINISH

    86

!insertmacro MUI_UNPAGE_CONFIRM

    87

!insertmacro MUI_UNPAGE_INSTFILES

    88

    89

; Set languages (first is default language)

    90

!insertmacro MUI_LANGUAGE "English"

    91

!insertmacro MUI_RESERVEFILE_LANGDLL

    92

    93

;--------------------------------------------------------------

    94

; (Core) OpenTTD install section. Copies all internal game data

    95

Section "!OpenTTD" Section1

    96

	; Overwrite files by default, but don't complain on failure

    97

	SetOverwrite try

    98

    99

	; Make savegame folder

   100

	SetOutPath "$INSTDIR\save"

   101

	; Define root variable relative to installer

   102

	!define PATH_ROOT "..\..\..\"

   103

   104

	; Copy language files

   105

	SetOutPath "$INSTDIR\lang\"

   106

	File ${PATH_ROOT}lang\*.lng

   107

	File ${PATH_ROOT}lang\english.txt

   108

   109

	; Copy data files

   110

	SetOutPath "$INSTDIR\data\"

   111

	File ${PATH_ROOT}data\*.grf

   112

	File ${PATH_ROOT}data\opntitle.dat

   113

	; Copy scenario files (don't choke if they don't exist)

   114

	SetOutPath "$INSTDIR\scenario\"

   115

	File /nonfatal ${PATH_ROOT}scenario\*.scn

   116

   117

	; Copy heightmap files (don't choke if they don't exist)

   118

	SetOutPath "$INSTDIR\scenario\heightmap\"

   119

	File /nonfatal ${PATH_ROOT}scenario\heightmap\*.*

   120

   121

	; Copy the rest of the stuff

   122

	SetOutPath "$INSTDIR\"

   123

   124

	; Copy text files

   125

	File ${PATH_ROOT}changelog.txt

   126

	File ${PATH_ROOT}COPYING

   127

	File ${PATH_ROOT}readme.txt

   128

	File ${PATH_ROOT}known-bugs.txt

   129

   130

	; Copy executable

   131

	File /oname=openttd.exe ${PATH_ROOT}Release\openttd.exe

   132

	File ${PATH_ROOT}strgen\Debug\strgen.exe

   133

   134

   135

	; Delete old files from the main dir. they are now placed in data/ and lang/

   136

	Delete "$INSTDIR\*.lng"

   137

	Delete "$INSTDIR\*.grf"

   138

	Delete "$INSTDIR\sample.cat"

   139

	Delete "$INSTDIR\ttd.exe"

   140

   141

   142

	; Create the Registry Entries

   143

	WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "Comments" "Visit ${APPURLLINK}"

   144

	WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "DisplayIcon" "$INSTDIR\openttd.exe,0"

   145

	WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "DisplayName" "OpenTTD ${APPVERSION}"

   146

	WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "DisplayVersion" "${APPVERSION}"

   147

	WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "HelpLink" "${APPURLLINK}"

   148

	WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "Install Folder" "$INSTDIR"

   149

	WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "Publisher" "OpenTTD"

   150

	WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "Shortcut Folder" "$SHORTCUTS"

   151

	WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "UninstallString" "$INSTDIR\uninstall.exe"

   152

	WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "URLInfoAbout" "${APPURLLINK}"

   153

	; This key sets the Version DWORD that new installers will check against

   154

	WriteRegDWORD HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "Version" ${INSTALLERVERSION}

   155

   156

	!insertmacro MUI_STARTMENU_WRITE_BEGIN "OpenTTD"

   157

	CreateShortCut "$DESKTOP\OpenTTD.lnk" "$INSTDIR\openttd.exe"

   158

	CreateDirectory "$SMPROGRAMS\$SHORTCUTS"

   159

	CreateShortCut "$SMPROGRAMS\$SHORTCUTS\OpenTTD.lnk" "$INSTDIR\openttd.exe"

   160

	CreateShortCut "$SMPROGRAMS\$SHORTCUTS\Uninstall.lnk" "$INSTDIR\uninstall.exe"

   161

	CreateShortCut "$SMPROGRAMS\$SHORTCUTS\Readme.lnk" "$INSTDIR\Readme.txt"

   162

	CreateShortCut "$SMPROGRAMS\$SHORTCUTS\Changelog.lnk" "$INSTDIR\Changelog.txt"

   163

	CreateShortCut "$SMPROGRAMS\$SHORTCUTS\Known-bugs.lnk" "$INSTDIR\known-bugs.txt"

   164

	!insertmacro MUI_STARTMENU_WRITE_END

   165

SectionEnd

   166

   167

;----------------------------------------------------------------------------------

   168

; TTDLX files install section. Copies all needed TTDLX files from CD or install dir

   169

Section "Copy Game Graphics" Section2

   170

	; Let's copy the files with size approximation

   171

	SetOutPath "$INSTDIR\gm"

   172

	CopyFiles "$CDDRIVE\gm\*.gm" "$INSTDIR\gm\" 1028

   173

	SetOutPath "$INSTDIR\data\"

   174

	CopyFiles "$CDDRIVE\sample.cat" "$INSTDIR\data\sample.cat" 1566

   175

	; Copy Windows files

   176

	CopyFiles "$CDDRIVE\trg1r.grf" "$INSTDIR\data\trg1r.grf" 2365

   177

	CopyFiles "$CDDRIVE\trgcr.grf" "$INSTDIR\data\trgcr.grf" 260

   178

	CopyFiles "$CDDRIVE\trghr.grf" "$INSTDIR\data\trghr.grf" 400

   179

	CopyFiles "$CDDRIVE\trgir.grf" "$INSTDIR\data\trgir.grf" 334

   180

	CopyFiles "$CDDRIVE\trgtr.grf" "$INSTDIR\data\trgtr.grf" 546

   181

	; Copy DOS files

   182

	CopyFiles "$CDDRIVE\trg1.grf" "$INSTDIR\data\trg1.grf" 2365

   183

	CopyFiles "$CDDRIVE\trgc.grf" "$INSTDIR\data\trgc.grf" 260

   184

	CopyFiles "$CDDRIVE\trgh.grf" "$INSTDIR\data\trgh.grf" 400

   185

	CopyFiles "$CDDRIVE\trgi.grf" "$INSTDIR\data\trgi.grf" 334

   186

	CopyFiles "$CDDRIVE\trgt.grf" "$INSTDIR\data\trgt.grf" 546

   187

	SetOutPath "$INSTDIR\"

   188

SectionEnd

   189

   190

;-------------------------------------------

   191

; Install the uninstaller (option is hidden)

   192

Section -FinishSection

   193

	WriteUninstaller "$INSTDIR\uninstall.exe"

   194

SectionEnd

   195

   196

; Modern install component descriptions

   197

!insertmacro MUI_FUNCTION_DESCRIPTION_BEGIN

   198

	!insertmacro MUI_DESCRIPTION_TEXT ${Section1} "OpenTTD is a fully functional clone of TTD and is very playable."

   199

	!insertmacro MUI_DESCRIPTION_TEXT ${Section2} "Copies the game graphics. Requires TTD (for Windows)."

   200

!insertmacro MUI_FUNCTION_DESCRIPTION_END

   201

   202

;-----------------------------------------------

   203

; Uninstall section, deletes all installed files

   204

Section "Uninstall"

   205

	MessageBox MB_YESNO|MB_ICONQUESTION \

   206

		"Remove the save game folders located at $\"$INSTDIR\save?$\"$\n \

   207

		If you choose Yes, your saved games will be deleted." \

   208

		IDYES RemoveSavedGames IDNO NoRemoveSavedGames

   209

	RemoveSavedGames:

   210

		Delete "$INSTDIR\save\autosave\*"

   211

		RMDir "$INSTDIR\save\autosave"

   212

		Delete "$INSTDIR\save\*"

   213

		RMDir "$INSTDIR\save"

   214

	NoRemoveSavedGames:

   215

   216

	MessageBox MB_YESNO|MB_ICONQUESTION \

   217

		"Remove the scenario folders located at $\"$INSTDIR\scenario?$\"$\n \

   218

		If you choose Yes, your scenarios will be deleted." \

   219

		IDYES RemoveScen IDNO NoRemoveScen

   220

	RemoveScen:

   221

		Delete "$INSTDIR\scenario\heightmap*"

   222

		RMDir "$INSTDIR\scenario\heightmap"

   223

		Delete "$INSTDIR\scenario\*"

   224

		RMDir "$INSTDIR\scenario"

   225

	NoRemoveScen:

   226

   227

	; Remove from registry...

   228

	!insertmacro MUI_STARTMENU_GETFOLDER "OpenTTD" $SHORTCUTS

   229

	ReadRegStr $SHORTCUTS HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "Shortcut Folder"

   230

   231

	DeleteRegKey HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD"

   232

   233

	; Delete self

   234

	Delete "$INSTDIR\uninstall.exe"

   235

   236

	; Delete Shortcuts

   237

	Delete "$DESKTOP\OpenTTD.lnk"

   238

	Delete "$SMPROGRAMS\$SHORTCUTS\OpenTTD.lnk"

   239

	Delete "$SMPROGRAMS\$SHORTCUTS\Uninstall.lnk"

   240

	Delete "$SMPROGRAMS\$SHORTCUTS\Readme.lnk"

   241

	Delete "$SMPROGRAMS\$SHORTCUTS\Changelog.lnk"

   242

	Delete "$SMPROGRAMS\$SHORTCUTS\Known-bugs.lnk"

   243

   244

	; Clean up OpenTTD dir

   245

	Delete "$INSTDIR\changelog.txt"

   246

	Delete "$INSTDIR\readme.txt"

   247

	Delete "$INSTDIR\known-bugs.txt"

   248

	Delete "$INSTDIR\openttd.exe"

   249

	Delete "$INSTDIR\strgen.exe"

   250

	Delete "$INSTDIR\COPYING"

   251

	Delete "$INSTDIR\INSTALL.LOG"

   252

	Delete "$INSTDIR\crash.log"

   253

	Delete "$INSTDIR\openttd.cfg"

   254

	Delete "$INSTDIR\hs.dat"

   255

	Delete "$INSTDIR\cached_sprites.*"

   256

	Delete "$INSTDIR\save\autosave\network*.tmp" ; temporary network file

   257

   258

	; Data files

   259

	Delete "$INSTDIR\data\opntitle.dat"

   260

   261

	Delete "$INSTDIR\data\2ccmap.grf"

   262

	Delete "$INSTDIR\data\airports.grf"

   263

	Delete "$INSTDIR\data\autorail.grf"

   264

	Delete "$INSTDIR\data\canalsw.grf"

   265

	Delete "$INSTDIR\data\dosdummy.grf"

   266

	Delete "$INSTDIR\data\elrailsw.grf"

   267

	Delete "$INSTDIR\data\nsignalsw.grf"

   268

	Delete "$INSTDIR\data\openttd.grf"

   269

	Delete "$INSTDIR\data\trkfoundw.grf"

   270

   271

	Delete "$INSTDIR\data\sample.cat"

   272

	; Windows Data files

   273

	Delete "$INSTDIR\data\trg1r.grf"

   274

	Delete "$INSTDIR\data\trghr.grf"

   275

	Delete "$INSTDIR\data\trgtr.grf"

   276

	Delete "$INSTDIR\data\trgcr.grf"

   277

	Delete "$INSTDIR\data\trgir.grf"

   278

	; Dos Data files

   279

	Delete "$INSTDIR\data\trg1.grf"

   280

	Delete "$INSTDIR\data\trgh.grf"

   281

	Delete "$INSTDIR\data\trgt.grf"

   282

	Delete "$INSTDIR\data\trgc.grf"

   283

	Delete "$INSTDIR\data\trgi.grf"

   284

   285

	; Music

   286

	Delete "$INSTDIR\gm\*.gm"

   287

   288

	; Language files

   289

	Delete "$INSTDIR\lang\*.lng"

   290

	Delete "$INSTDIR\lang\english.txt"

   291

   292

	; Remove remaining directories

   293

	RMDir "$SMPROGRAMS\$SHORTCUTS\Extras\"

   294

	RMDir "$SMPROGRAMS\$SHORTCUTS"

   295

	RMDir "$INSTDIR\gm"

   296

	RMDir "$INSTDIR\lang"

   297

	RMDir "$INSTDIR\data"

   298

	RMDir "$INSTDIR"

   299

   300

SectionEnd

   301

   302

;------------------------------------------------------------

   303

; Custom page function to find the TTDLX CD/install location

   304

Function SelectCDEnter

   305

	SectionGetFlags ${Section2} $0

   306

	IntOp $1 $0 & 0x80 ; bit 7 set by upgrade, no need to copy files

   307

	IntCmp $1 1 DoneCD ; Upgrade doesn't need copy files

   308

   309

	IntOp $0 $0 & 1

   310

	IntCmp $0 1 NoAbort

   311

	Abort

   312

NoAbort:

   313

   314

	GetTempFileName $R0

   315

	!insertmacro MUI_HEADER_TEXT "Locate TTD" "Setup needs the location of Transport Tycoon Deluxe in order to continue."

   316

	!insertmacro MUI_INSTALLOPTIONS_EXTRACT_AS "CDFinder.ini" "CDFinder"

   317

   318

	ClearErrors

   319

	; Now, let's populate $CDDRIVE

   320

	ReadRegStr $R0 HKLM "SOFTWARE\Fish Technology Group\Transport Tycoon Deluxe" "HDPath"

   321

	IfErrors NoTTD

   322

	StrCmp $CDDRIVE "" 0 Populated

   323

	StrCpy $CDDRIVE $R0

   324

Populated:

   325

	StrCpy $AddWinPrePopulate "Setup has detected your TTD folder. Don't change the folder. Simply press Next."

   326

	Goto TruFinish

   327

NoTTD:

   328

	StrCpy $AddWinPrePopulate "Setup couldn't find TTD. Please enter the path where the graphics files from TTD are stored and press Next to continue."

   329

TruFinish:

   330

	ClearErrors

   331

	!insertmacro MUI_INSTALLOPTIONS_WRITE "CDFinder" "Field 2" "State" $CDDRIVE          ; TTDLX path

   332

	!insertmacro MUI_INSTALLOPTIONS_WRITE "CDFinder" "Field 3" "Text" $AddWinPrePopulate ; Caption

   333

DoneCD:

   334

	; Initialize the dialog *AFTER* we've changed the text otherwise we won't see the changes

   335

	!insertmacro MUI_INSTALLOPTIONS_INITDIALOG "CDFinder"

   336

	!insertmacro MUI_INSTALLOPTIONS_SHOW

   337

FunctionEnd

   338

   339

;----------------------------------------------------------------

   340

; Custom page function when 'next' is selected for the TTDLX path

   341

Function SelectCDExit

   342

	!insertmacro MUI_INSTALLOPTIONS_READ $CDDRIVE "CDFinder" "Field 2" "State"

   343

	; If trg1r.grf does not exist at the path, retry with DOS version

   344

	IfFileExists $CDDRIVE\trg1r.grf "" DosCD

   345

	IfFileExists $CDDRIVE\trgir.grf "" NoCD

   346

	IfFileExists $CDDRIVE\sample.cat hasCD NoCD

   347

DosCD:

   348

	IfFileExists $CDDRIVE\TRG1.GRF "" NoCD

   349

	IfFileExists $CDDRIVE\TRGI.GRF "" NoCD

   350

	IfFileExists $CDDRIVE\SAMPLE.CAT hasCD NoCD

   351

NoCD:

   352

	MessageBox MB_OK "Setup cannot continue without the Transport Tycoon Deluxe Location!"

   353

	Abort

   354

hasCD:

   355

FunctionEnd

   356

   357

;---------------------------------------------------------------------

   358

; Custom page function to show notices for running OpenTTD

   359

; We have extracted this custom page as Notice in the .onInit function

   360

Function ShowWarningsPage

   361

	!insertmacro MUI_HEADER_TEXT "Installation Complete" "Important notices for OpenTTD usage."

   362

	!insertmacro MUI_INSTALLOPTIONS_EXTRACT_AS "notice.ini" "Notice"

   363

	!insertmacro MUI_INSTALLOPTIONS_INITDIALOG "Notice"

   364

   365

	Call GetWindowsVersion

   366

	Pop $R0

   367

   368

	; Hide the MSLU text if the installer is not run on Win9x systems

   369

	StrCmp $R0 "winnt" 0 Win9x

   370

	!insertmacro MUI_INSTALLOPTIONS_READ $R1 "Notice" "Field 1" "HWND" ; MSLU groupbox

   371

	ShowWindow $R1 0

   372

	!insertmacro MUI_INSTALLOPTIONS_READ $R1 "Notice" "Field 2" "HWND" ; MSLU text

   373

	ShowWindow $R1 0

   374

	!insertmacro MUI_INSTALLOPTIONS_READ $R1 "Notice" "Field 3" "HWND" ; MSLU link

   375

	ShowWindow $R1 0

   376

Win9x:

   377

	ClearErrors

   378

	!insertmacro MUI_INSTALLOPTIONS_SHOW

   379

FunctionEnd

   380

   381

;-------------------------------------------------------------------------------

   382

; Determine windows version, returns "win9x" if Win9x/Me or "winnt" on the stack

   383

Function GetWindowsVersion

   384

	ClearErrors

   385

	StrCpy $R0 "winnt"

   386

   387

	ReadRegStr $R1 HKLM "SOFTWARE\MICROSOFT\WINDOWS NT\CurrentVersion" CurrentVersion

   388

	IfErrors 0 WinNT

   389

	StrCpy $R0 "win9x"

   390

WinNT:

   391

	ClearErrors

   392

	Push $R0

   393

FunctionEnd

   394

   395

Var OLDVERSION

   396

Var UninstallString

   397

   398

;-----------------------------------------------------------------------------------

   399

; NSIS Initialize function, determin if we are going to install/upgrade or uninstall

   400

Function .onInit

   401

	StrCpy $SHORTCUTS "OpenTTD"

   402

   403

	SectionSetFlags 0 17

   404

   405

	; Starts Setup - let's look for an older version of OpenTTD

   406

	ReadRegDWORD $R8 HKLM "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "Version"

   407

   408

	IfErrors ShowWelcomeMessage ShowUpgradeMessage

   409

ShowWelcomeMessage:

   410

	ReadRegStr $R8 HKLM "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "Version"

   411

	; In the event someone still has OpenTTD 0.1, this will detect that (that installer used a string instead of dword entry)

   412

	IfErrors FinishCallback

   413

   414

ShowUpgradeMessage:

   415

	IntCmp ${INSTALLERVERSION} $R8 VersionsAreEqual InstallerIsOlder  WelcomeToSetup

   416

WelcomeToSetup:

   417

	; An older version was found.  Let's let the user know there's an upgrade that will take place.

   418

	ReadRegStr $OLDVERSION HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "DisplayVersion"

   419

	; Gets the older version then displays it in a message box

   420

	MessageBox MB_OK|MB_ICONINFORMATION \

   421

		"Welcome to ${APPNAMEANDVERSION} Setup.$\n \

   422

		This will allow you to upgrade from version $OLDVERSION."

   423

	SectionSetFlags ${Section2} 0x80 ; set bit 7

   424

	Goto FinishCallback

   425

   426

VersionsAreEqual:

   427

	ReadRegStr $UninstallString HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD" "UninstallString"

   428

	IfFileExists "$UninstallString" "" FinishCallback

   429

	MessageBox MB_YESNO|MB_ICONQUESTION \

   430

		"Setup detected ${APPNAMEANDVERSION} on your system. That's the version this program will install.$\n \

   431

		Are you trying to uninstall it?" \

   432

		IDYES DoUninstall IDNO FinishCallback

   433

DoUninstall: ; You have the same version as this installer.  This allows you to uninstall.

   434

	Exec "$UninstallString"

   435

	Quit

   436

   437

InstallerIsOlder:

   438

	MessageBox MB_OK|MB_ICONSTOP \

   439

		"You have a newer version of ${APPNAME}.$\n \

   440

		Setup will now exit."

   441

	Quit

   442

   443

FinishCallback:

   444

	ClearErrors

   445

FunctionEnd

   446

; eof

   447