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 Forum index » Off-Topic Area » Programming
GtkDialog - tips
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technosaurus


Joined: 18 May 2008
Posts: 3845
PostPosted: Sun 15 Jan 2012, 19:42    Post subject:  
It often comes up how to get wget to give you the percent complete (for progress bars), so I grokked it out to work with Xdialog (I am working on some gtk1 stuff right now) - perhaps someone would like to tweak it for gtkdialog?

Code:
download_progress(){
while ([ $# -gt 0 ]) do
   wget -v $1 -o /dev/stdout | while read LINE; do
      case $LINE in
         *%*)LINE=${LINE##*..};echo ${LINE%%%*};;
      esac
   done |Xdialog --gauge "Download progress ($# files remaining.)
Current file is:
$1" 0 0
   shift
done
}


and here is one for curl:
{export your CURL_PARAMETERS first}
Code:
upload_progress(){
curl --progress-bar $CURL_PARAMETERS 2>&1 \
| tr "\r" "\n"|sed "s,# *,,gm" \
| Xdialog --title "Progress" --gauge "$1 \n transfering ..." 0 0
}

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Dougal


Joined: 19 Oct 2005
Posts: 2505
Location: Hell more grotesque than any medieval woodcut
PostPosted: Tue 17 Jan 2012, 14:28    Post subject:  
technosaurus wrote:
It often comes up how to get wget to give you the percent complete (for progress bars), so I grokked it out to work with Xdialog (I am working on some gtk1 stuff right now) - perhaps someone would like to tweak it for gtkdialog?

Gtkdialog enables you to run a shell inside the progressbar element, so you can just sort the wget output inside it... that's what I did with the dhcpcd progressbars (note that with gtkdialog, when you echo a number, it is used for the percentage, while echoing text changes what's displayed in the progressbar).
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jpeps

Joined: 31 May 2008
Posts: 2449
PostPosted: Sat 21 Jan 2012, 04:39    Post subject:
Subject description: Combo-Checklist		  
Here's one solution to a combo-checklist. I was looking for a simple way to create a useable array for the whole checklist.

Code:

#!/bin/sh

#Combo-Checklist example

export NUM="5"
 function funcChkCreate() {
 
 for ((i=1;i<"$NUM";i++)); do
    echo '<checkbox>
      <label>NAME '"$i"'</label>
      <variable>STAT'"$i"'</variable>
     </checkbox>'
 done
   
  }
ComboCheck() {

echo
for ((i=1;i<"$NUM";i++)); do
eval echo "NAME ${i}=""\$STAT${i}" >/tmp/out
var[$i]=`cat /tmp/out`
echo "${var[$i]}"
  done
 
}
export -f ComboCheck

export MAIN_DIALOG='

<vbox height="150" scrollable="true">
'"$(funcChkCreate)"'
<hbox>
<button>
  <label>ComboCheck</label>
  <action>ComboCheck</action>
</button>
<button ok></button>
</hbox>
</vbox>
'
gtkdialog --program=MAIN_DIALOG
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RSH


Joined: 05 Sep 2011
Posts: 1564
Location: Germany
PostPosted: Sat 21 Jan 2012, 04:52    Post subject:  
jpeps wrote:
Here's one solution to a combo-checklist. I was looking for a simple way to create a useable array for the whole checklist.


Hi.

I think it would be more comfortable to have the buttons outside the scrollable section.

Code:

#!/bin/sh

#Combo-Checklist example

export NUM="15"
 function funcChkCreate() {
 
 for ((i=1;i<"$NUM";i++)); do
    echo '<checkbox>
      <label>NAME '"$i"'</label>
      <variable>STAT'"$i"'</variable>
     </checkbox>'
 done
   
  }
ComboCheck() {

echo
for ((i=1;i<"$NUM";i++)); do
eval echo "NAME ${i}=""\$STAT${i}" >/tmp/out
var[$i]=`cat /tmp/out`
echo "${var[$i]}"
  done
 
}
export -f ComboCheck

export MAIN_DIALOG='
<vbox>
<vbox height="150" scrollable="true">
'"$(funcChkCreate)"'
</vbox>
<vbox>
<hbox>
<button>
  <label>ComboCheck</label>
  <action>ComboCheck</action>
</button>
<button ok></button>
</hbox>
</vbox>
</vbox>'
gtkdialog --program=MAIN_DIALOG
combocheck-buttoons-outside.jpg
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combocheck-buttoons-outside.jpg

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jpeps

Joined: 31 May 2008
Posts: 2449
PostPosted: Sat 21 Jan 2012, 05:16    Post subject:  
Good idea, RSH. I just incorporated that into gnewpet.
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RSH


Joined: 05 Sep 2011
Posts: 1564
Location: Germany
PostPosted: Sat 21 Jan 2012, 05:27    Post subject:  
I did play a little with that script, to understand how it works. Something has made me a little disturbed.

By giving 5 as NUM i always get only 4 arguments back.

I think it is because of

Code:
for ((i=1;i<"$NUM";i++)); do


This one: i<"$NUM means - smaller as $NUM, but 5 is not smaller as $NUM.

So i-1<"$NUM works well and gives back 5 arguments.

In PASCAL i would write i<=$NUM, but i don't know the correct syntax in bash to use <=$NUM.

I do know:

equals = if a = b - and
unequals = if a != b

How do i write in bash a <= b ?
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jpeps

Joined: 31 May 2008
Posts: 2449
PostPosted: Sat 21 Jan 2012, 05:42    Post subject:  
RSH wrote:

By giving 5 as NUM i always get only 4 arguments back.


Typically, you start with i=0. This is just a template, so NUM is irrelevant. In practice, the labels would be names from a list with NUM being the number of lines.
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SFR


Joined: 26 Oct 2011
Posts: 573
PostPosted: Sun 22 Jan 2012, 07:44    Post subject: How to handle a variable inside 'edit' field?  
How to handle a variable inside <edit>'s <default></default> or <input></input> tags?

I wrote simple encryption tool that operates on temporary files, but it should be done on variables, for security reasons.
Anyway, as an example, let's say I have:
Code:
#! /bin/sh

message="Something"

change () {
message="Completely different something"
echo $message      # for debugging
}
export -f change

export MAIN='
  <vbox>
    <edit>
      <variable>VAR</variable>
      <default>'"$message"'</default>
    </edit>
    <button>
      <action>change</action>
      <action>refresh:VAR</action>
      <label>Refresh</label>
    </button>
  </vbox>
'
gtkdialog -p MAIN
echo $message      #for debugging also


...and it doesn't work, 'edit' field isn't refreshed at all.
Also, tried for 256 ways to put a variable between <input></input> tags - unsuccessfully.
The odd thing is that when I press "Refresh" button, the 'message' variable is changed (first 'echo'), but on exit it returns to its previous state (second 'echo').
AFAIK variables in Bash are global by default..?

How can I do it and is it possible at all?

TIA & Greetings!
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don570


Joined: 10 Mar 2010
Posts: 2533
Location: Ontario
PostPosted: Mon 23 Jan 2012, 14:50    Post subject:  
I'm working on an improved bacon recorder and
I used a 'refresh' of a variable successfully. Wink
The variable SAVEFOLDER was defined earlier in the script.

Code:


<hbox>
<text><label>"Save Folder (path)"</label></text>
 
    <entry tooltip-text=" Folder destination for recording ">
     <input>cat "$WORKDIR/SAVEFOLDER"</input>
     <variable>SAVEFOLDER</variable>
     
    </entry>
<button tooltip-text=" Folder selector ">
     <input file>/usr/local/share/icons/folder-open.png</input>
        <action>Xdialog --title "Choose Directory to save recording" --stdout --no-buttons --no-cancel --dselect /mnt 32 80 > $WORKDIR/SAVEFOLDER</action>     
        <action>refresh:SAVEFOLDER</action>       
    </button>
    <button tooltip-text="Path Examples">
      <input file stock="gtk-info"></input>     
    <action>info_dialog</action>
</button>
</hbox>

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SFR


Joined: 26 Oct 2011
Posts: 573
PostPosted: Mon 23 Jan 2012, 16:43    Post subject:  
Hi don570

You're absolutely right and a variable refresh works fine with <text><label> or <entry><input> (and even with <button><label>!),
but for unknown reason it doesn't want to cooperate with <edit><default> and <edit><input>.
I can use only <input file> to be able to refresh it.

On the other hand I'm new to GTKDialog and it may be some stupid mistake in my code,
but on the other hand again, I tried so many combinations and nothing...
I'm totally confused by this...

Thanks anyway Smile

EDIT:
My first example was a bit fuzzy, here's another one where refreshing doesn't work:
Code:
#!/bin/sh

export MAIN='
  <vbox>
    <edit>
      <variable>VAR</variable> 
      <default>'"`date`"'</default>
    </edit>
    <button>
      <action>refresh:VAR</action>
      <label>Refresh</label>
    </button>
  </vbox>
'
gtkdialog -p MAIN

Greetings!
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seaside

Joined: 11 Apr 2007
Posts: 841
PostPosted: Mon 23 Jan 2012, 21:23    Post subject:  
SFR,

This works -

Code:

export MAIN='
  <vbox>
    <entry>
      <variable>VAR</variable>
      <input>date</input>
    </entry>
    <button>
      <action>refresh:VAR</action>
      <label>Refresh</label>
    </button>
  </vbox>
'
gtkdialog3 -p MAIN


Generally, only "<variable>VAR</variable>" variables get set on a "refresh:VAR" command. Variables like "$message" are set once and if a "child process" (such as a function) is begun in an attempt to reset a variable, it isn't visible to the parent (original gtkdialog program).

You'll notice that frequently /tmp files are used to hold variables so that they can be referenced in those cases.

Cheers,
s
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SFR


Joined: 26 Oct 2011
Posts: 573
PostPosted: Tue 24 Jan 2012, 06:58    Post subject:  
seaside wrote:
This works -

Code:

export MAIN='
  <vbox>
    <entry>
      <variable>VAR</variable>
      <input>date</input>
    </entry>
    <button>
      <action>refresh:VAR</action>
      <label>Refresh</label>
    </button>
  </vbox>
'
gtkdialog3 -p MAIN

Yes, this works, but after deeper reflection I think that GTKDialog simply doesn't provide this mechanism in <edit> widget.

entry widget definition:
Quote:
Code:
<entry tag_attr="value"...>
        <default>text</default>
        <variable>varname</variable>
        <height>value</height>
        <width>value</width>
        <input>command</input>
        <input file>filename</input>
        <sensitive>state</sensitive>
        <action>activity</action>...
        <action signal="type">activity</action>...
        <action type="function">parameter</action>...
        <output file>filename</output>
</entry>

There are <input file> AND <input> directives available. All right.

edit widget definition:
Quote:
Code:
<edit tag_attr="value"...>
        <default>state</default>
        <variable>varname</variable>
        <height>value</height>
        <width>value</width>
        <input file>filename</input>
        <sensitive>state</sensitive>
        <action signal="type">activity</action>...
        <output file>filename</output>
</edit>

There's ONLY <input file> directive...

But nevermind - I can use 'shred' to delete temp files in a secure way. Twisted Evil

seaside wrote:
Generally, only "<variable>VAR</variable>" variables get set on a "refresh:VAR" command. Variables like "$message" are set once and if a "child process" (such as a function) is begun in an attempt to reset a variable, it isn't visible to the parent (original gtkdialog program).

You'll notice that frequently /tmp files are used to hold variables so that they can be referenced in those cases.

Thanks for clarification, I suspected something like that, but wasn't sure how exactly it works. Smile

Thanks again to all of you & Greetings
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zigbert


Joined: 29 Mar 2006
Posts: 5295
Location: Valåmoen, Norway
PostPosted: Wed 01 Feb 2012, 11:03    Post subject:  
I will explain the new event-handling in Pmusic 2.4.0. It is a smarter way to update gui on non-user-actions. User-actions is mouse-clicks and key-entries, and is the common way to interact between user and gui. An example of updating the gui on a non-user-action in Pmusic is the loading of id3-tags for files shown in the file-browser....

When clicking on a directory, the browser field refreshes and shows the content of the new directory. Now, Pmusic continues with a background process to read the id3 information of the files. When finished, the browser field should be updated by the new info. - Without the user to click anywhere.

The solution is to either use a <progressbar> which runs its <action> when reaches 100% or a <timer> which acts at a given interval. Older Pmusic releases used the <progressbar> solution while recent code uses a <timer>. Both solutions has the downside that they uses an amount of cpu power. In a complex gui with several non-user actions this could end up with several cpu-hungry <timers> updating their unique widget(s) of the gui.

Pmusic has used 2 <timers> running constantly to update their defined gui-part. You might think that 1 <timer> would be enough, - it could refresh all wanted widgets - it wouldn't harm if the refreshing didn't change anything. BUT, refreshing has an effect on the focus handling. It simply resets the focus, which means that:
- scrolling in <table> is moved to top.
- what you are about to write in an <entry> is cleared.
- Your selected item in the <tree> is not selected anymore
- ...

The idea of Pmusic 2.4.0 was to update all kinds of trackinfo (meta-tags, lyrics, albumart, discography, ...) when a new track starts playing. This would not be possible with the underlaying event-handling in Pmusic because it would either suck you cpu-power (with several <timers>), or a global refreshing would make it impossible to be a user (because of focus issues). Also, there is a fact that too many refreshing <action> on a <timer> will increase cpu-usage as well.

So the solution has been to add ONE <timer>, which refreshes a small set of <checkboxes> that (if true) refreshes a single or group of widgets.

<checkboxes> can be set true or false by their <input file>, so we can simply 'echo true' to its <input file>. The <timer> runs its <actions> each second, and the <checkbox> will be refreshed by its <input file>. The code could look like this:
Code:
<checkbox visible="false">
 <label>a</label>
 <variable>UPDATE_GUI</variable>
 <input>cat /path/UPDATE_GUI</input>
 <action>if true refresh:PLAYLIST</action>
 <action>if true refresh:ARTWORK</action>
 <action>if true refresh:BUTTON_PLAY</action>
 <action>if true echo false > /path/UPDATE_GUI</action>
 <action>if true refresh:UPDATE_GUI</action>
</checkbox>

All actions will run only if value is true. To avoid more than one refreshing we reset <input file> and the <checkbox> value to false. Now it will be silent until next time we 'echo true > inputfile'.
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jpeps

Joined: 31 May 2008
Posts: 2449
PostPosted: Wed 01 Feb 2012, 11:54    Post subject:  
Wouldn't it be posible to eliminate the timer altogether? If something like a new track gets played, an input file gets flagged and the checkbox gets refreshed.
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zigbert


Joined: 29 Mar 2006
Posts: 5295
Location: Valåmoen, Norway
PostPosted: Wed 01 Feb 2012, 12:04    Post subject:  
jpeps wrote:
Wouldn't it be posible to eliminate the timer altogether? If something like a new track gets played, an input file gets flagged and the checkbox gets refreshed.
What will make the checkbox reread the inputfile?
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