#!/bin/bash
# Author: Rosen Aleksandrov
# E-Mail: sandikata@yandex.ru
# IRC: irc.freenode.net/#calculate irc.politeia.in/#bulgaria
# Dependencies: zenity imagemagick
# License: GPLv3

gui="zenity"
converter="mogrify"
title="imagemagick-zenity"

$gui --width 500 --question --title="$title" --text "Welcome to imagemagick-zenity!" --ok-label="Start" --cancel-label="Quit"
case $? in
	0)
		echo $welcome ;;
	1)
		$gui --warning --title="$title" --text "Program will close when press OK" ; exit 0 ;;
	255)
		$gui --warning --title="$title" --text "Program will close when press OK" ; exit 0 ;;
esac

IFS=$'\n' image=( `$gui --file-selection  --multiple --separator=$'\n' --filename=$HOME/ --file-filter='Image Files (jpg,png,bmp,tiff,pdf,djvu) | *.jpg *.png *.bmp *.tiff *.pdf *.djvu' --file-filter='All files | *' --title="Select an image files"` )
case $? in
        0)
                echo $image ;;
        1)
                $gui --warning --title="$title" --text "Program will close when press OK" ; exit 0 ;;
        255)
                $gui --warning --title="$title" --text "Program will close when press OK" ; exit 0 ;;
esac

outformat=`$gui --title="Format Selector" --list --radiolist --width=400 --height=300 --column="" --column="Format" TRUE "jpg" FALSE "png" FALSE "bmp" FALSE "tiff" FALSE "pdf" FALSE "djvu" --text "Select output image format."` 
case $? in
        0)
                echo $outformat ;;
        1)
                $gui --warning --title="$title" --text "Program will close when press OK" ; exit 0 ;;
        255)
                $gui --warning --title="$title" --text "Program will close when press OK" ; exit 0 ;;
esac

scale=`$gui --scale --text="Quality level" --value=85`
case $? in
	0)
		echo $scale ;;
	1)
		$gui --warning --title="$title" --text "Program will close when press OK" ; exit 0 ;;
	255)
		$gui --warning --title="$title" --text "Program will close when press OK" ; exit 0 ;;
esac

resolution=`$gui --title="Resolution Selector" --list --radiolist --width=400 --height=300 --column="" --column="Resolution" FALSE "640x480" FALSE "800x600" FALSE "1024x768" FALSE "1280x1024" TRUE "1680x1050" FALSE "1920x1080" --text "Select image resolution"`
case $? in
        0)
                echo $resolution ;;
        1)
                $gui --warning --title="$title" --text "Program will close when press OK" ; exit 0 ;;
        255)
                $gui --warning --title="$title" --text "Program will close when press OK" ; exit 0 ;;
esac

IFS=$'\n' outpath=`$gui --file-selection  --separator=$'\n' --filename=$HOME/ --directory --title="Select where to save converted images."`
case $? in
	0)
		echo $outpath ;;
	1)
		echo "Calcel Pressed!" ;;
	255)
		echo "Window Closed!" ;;
esac

step=$((100/${#image[@]}))
pos=0
 
(
for i in ${image[@]}; do
    echo "# Current file:\n$i"
    $converter -path $outpath -format $outformat -quality $scale -scale $resolution "$i"
    pos=$(($pos+1))
    echo $(($step*$pos))
done
) | $gui --progress --percentage=0 --no-cancel --auto-close --title="$title"