Thumbnail viewer for PicShow.

It will show all pictures in a directory as thumbnails. A double click on a thumbnail will start a utility (e.g. PicShow).
History
V7.253)

    AmigaOS 4 version fixed to run with the new memory system of Upd. 5 

V7.246

    crash fixed in rename / move window
    option to remove border around thumbnails
    option to ignore icon files (useful if icon.datatype is installed)
    thumbnail size is now set for the actual picture without the frame
    minimum thumbnail size reduced to 10x10
    does not read the same directory again when choosen by requester 

V7.224

    Starter program corrected to work on AmigaOS 4 Upd. 4
    Added mouse wheel support for AmigaOS 4 Upd. 4 

V7.222

    bug fixed: crash when clicked into empty window 

V7.221

    current work-in-progress version of Thumb. I don't remember what's changed. 

V7.168

    HAM pictures are shown correctly
    locale bugs fixed 

V7.107

    added option to read directories recursively
    added option to pause thumbnail creation
    MorphOS version fixed 

V7.91

    save of index pages finished
    added options for thumbnail size and task priority
    AmigaOS 4 + MorphOS versions 

V0.7

    save thumbnails as jpg pictures (needs jpeg.library)
    experimental save of index pages (needs jpeg.library)
    send a list of files to PicShow (or any other application that accepts the LIST switch)
    small stub program automatically starts the correct processor version
    update 23-Nov-2003: forgot to include 68k version 

V0.6

    PowerUp version ! A really stupid little bug prevented me from compiling it for PowerUp. Fixed. 

V0.5

    mark thumbnails by dragging a rubber band with the mouse. - hold down CTRL to unselect - hold down ALT to toggle selection
    slowly click a thumbnail twice to rename it.
    drag directory icon into thumb window to read it
    shift-click directory icon on startup to read it.
    directory requesters show files, too.
    stack is increased automagically.
    failure to rename a thumbnail gives an error message instead just a beep.
    some bugs fixed when move / rename fails 

V0.4

    extended selection dialogue. You can select pictures by name pattern, by type, size, or by proportion (e.g. 4:3).
    PPC version: increased stack size for subtasks and added check for stack to be at least 100,000 bytes for main program. 

V0.3

    reduced number of context switches in PPC version. GUI is much faster now. 

V0.2

    WarpOS version
    Action menu
    Rename with pattern function. Use * as pattern. You can use multiple asterisks, but be careful: if the number of asterisks does not match, strange things may happen. 

Warning: use the commands from the action menu with care ! I've not tested them very well.
Usage

Copy the executable to the same directory as PicShow. Please note that "Thumb" is only a stub program. You also need the actual processor version "Thumb.???", where ??? is 000, elf, wos, mos or os4.

Thumb can be called from Workbench or Shell. You can set these parameters in the Shell or in the icon's tooltypes:
PATH	path to the directory that should be displayed. Default is the current directory.
UTILITY	command line to execute on a double click. Use %s as a placeholder for the picture name. Usualy the name should be enclosed in quotation marks. Default is PicShow.
PUBSCREEN	name of the pubscreen. Default is Workbench.
ALL	Include subdirectories recursively
QUIT	Make Thumb quit when a picture is doubleclicked.
REQUEST	Open a path requester.
LISTPARM	Name of the switch which makes the viewer utility treat the file name as a picture list instead of a single picture. This string is appended to the end of the UTILITY command line. Default is LIST.
THUMBW	Width of the thumbnails. Default is 100.
THUMBH	Height of the thumbnails including the description text. Default is 100.
DIRPRI	Priority of the directory reading task. Default is -5.
THUMBPRI	Priority of the thumbnail creation task. Default is -5.

To start Thumb from PicShow add a line like this to PicShow.keys:

F3 = SHELL run thumb "%p"

Notes:

    you have to use run, otherwise PicShow will freeze until Thumb is finished.
    if Thumb or PicShow is not in the DOS path, you have to specify the absolute directory. Example:

    F3 = SHELL run sys:utilities/Thumb "%p" sys:utilities/PicShow

Hints:

    I found a lot of bugs in PicShow when switching from PicShow to Thumb and vice versa. Please only use the latest update above with Thumb.
    to get the maximum performance you should quit neither PicShow nor Thumb. Press F3 to switch from PicShow to Thumb and double click a picture to switch back.