fxruby-users — General-purpose discussion list for FXRuby

Re: [Fxruby-users] reparent/linkAfter in FXFileSelector widget

[Lyle J. <jl...@cf...>]

Rich wrote:

> I'm trying to insert my own FXTextField right after the directory drop 
> down in the first FXHorizontalFrame... but I've only found the 
> 'children()' method as the way to navigate through the existing 
> structure... and that returns an FXWindow... reparent and linkAfter 
> require an FXComposite type as the parameter...

<snip code examples>

> What are my options? Is there an easy/easier way to 'insert' something 
> into an existing widget like the FXFileSelector?

The approaches that you're trying are correct, but there is a problem 
with the return values for FXWindow#children. The first child widget for 
the FXFileSelector is supposed to be an FXHorizontalFrame but it's being 
returned to you as an FXWindow instance instead. I know what's wrong, 
but I don't think there's a workaround for FXRuby-1.0.27. I have added 
this to the bug list and it should be fixed in the next release.

Re: [Fxruby-users] Copying an Image with FXMemoryStream?

[Lyle J. <jl...@cf...>]

Carsten Eckelmann wrote:

> thanks this helps a bit (it gets my app going), but it's VERY SLOW. I'm 
> writing an ImageView Widget that doesn't scroll, but scales the image 
> according to the window size. This means, that with every SEL_PAINT 
> message I need to copy a back_image to the front_image, you can imagine 
> how slow the drawing is, when copying via files.

[Sorry for the delayed response.]

I've fixed some things for FXMemoryStream for the next release, so 
hopefully you'll be able to use that instead in the near future.

Re: [Fxruby-users] Why does it return FXRbTextField when I call 'getClassName()' on an FXTextField?

[Lyle J. <jl...@cf...>]

Rich wrote:

> puts FXTextField.new(mainwin,20).getClassName()

It's returning the name of the underlying C++ class. There's no reason 
for this function to even be exposed to the Ruby interface, just an 
oversight on my part. If you need to know the Class of the Ruby object 
you've got, just use the standard Object#class instead.

Re: [Fxruby-users] Why does it return FXRbTextField when I call 'getClassName()' on an FXTextField?

[Joel V. <vj...@PA...>]

Rich wrote:
> Here's the code:
>  
> require 'fox'
> include Fox
> theApp=FXApp.new
> mainwin=FXMainWindow.new(theApp,"Test")
> puts FXTextField.new(mainwin,20).getClassName()
> theApp.create
> mainwin.show(PLACEMENT_SCREEN)
> theApp.run

I dunno (maybe it has something to do with the way C++ classes are 
wrapped), but

puts FXTextField.new(mainwin,20).class.name

behaves in an unsurprising way. Hope that helps...

[Fxruby-users] Why does it return FXRbTextField when I call 'getClassName()' on an FXTextField?

[Rich <ri...@li...>]

Here's the code:

require 'fox'
include Fox
theApp=3DFXApp.new
mainwin=3DFXMainWindow.new(theApp,"Test")
puts FXTextField.new(mainwin,20).getClassName()
theApp.create
mainwin.show(PLACEMENT_SCREEN)
theApp.run

-Rich

[Fxruby-users] reparent/linkAfter in FXFileSelector widget

[Rich <ri...@li...>]

I'm trying to insert my own FXTextField right after the directory drop =
down in the first FXHorizontalFrame... but I've only found the =
'children()' method as the way to navigate through the existing =
structure... and that returns an FXWindow... reparent and linkAfter =
require an FXComposite type as the parameter...

Here's the two different NON-working code attempts:

localVF=3DFXVerticalFrame.new(contentHF,LAYOUT_FILL_X|LAYOUT_FILL_Y)
lfs=3DFXFileSelector.new(localVF,nil,0,LAYOUT_FILL_X|LAYOUT_FILL_Y)
ldTF=3DFXTextField.new(localVF,20,nil,0,LAYOUT_FILL_X)
ldTF.reparent(lfs.children()[0])

...and a different approach...

localVF=3DFXVerticalFrame.new(contentHF,LAYOUT_FILL_X|LAYOUT_FILL_Y)
lfs=3DFXFileSelector.new(localVF,nil,0,LAYOUT_FILL_X|LAYOUT_FILL_Y)
ldTF=3DFXTextField.new(lfs.children()[0],20,nil,0,LAYOUT_FILL_X)
ldTF.linkAfter(lfs.children()[0].children()[3])

What are my options? Is there an easy/easier way to 'insert' something =
into an existing widget like the FXFileSelector?

-Rich

Re: [Fxruby-users] How do you get the width of a wdiget?

[Rich <ri...@li...>]

I think I answered my own question - I was asking for the width before =
the window had been 'drawn' (is that the right term?)... so I got '1'.

If I asked for the width after it was drawn, then I got the more =
sensible answer...

-Rich

[Fxruby-users] How do you get the width of a wdiget?

[Rich <ri...@li...>]

When I output the 'width' of a widget I get '1'... I'm assuming that's =
because it's autosized - but then how can I tell how big it is at any =
time during runtime?

I looked through the archives at SourceForge, but none of the subject =
lines seemed to match.

Thanks for any help with such a simple question!

-Rich

Re: [Fxruby-users] Core dump when exiting

[Joel V. <vj...@PA...>]

chris mueffling wrote:
> Hi!
> 
> Using ruby 1.8.{0,1}, fox-1.0.{43,48}, FXRuby-1.0.{25,27} on 
> Linux/Intel and Solaris/Intel and WindowsXP:
> 
> I have a FOX application, everything works fine. But as soon as
> I call 'exit' from within (or send a FXApp::ID_QUIT to getApp())
> I get something like:
> 
> ------------------------------------------------
> ./rootwindow.rb:133: [BUG] Segmentation fault
> ruby 1.8.1 (2003-12-25) [i686-linux-gnu]
> 
> Aborted
> ------------------------------------------------
> 
> Since this is not a very expressive error message: 
> 
> Is this behaviour known to anyone? Any hints in which direction
> I should go finding this error?

What I always try first in these situations is: turn off garbage 
collection with GC.disable. If that stops the segfault, then it's a good 
bet there's a bug somewhere in the mark/free funcs within FXRuby.

Other than that, I would try paring down the app to the minimal code 
that will reliably cause the problem, and then post it here. Of course, 
that can be hard work....

[Fxruby-users] Core dump when exiting

[chris m. <ze...@gm...>]

Hi!

Using ruby 1.8.{0,1}, fox-1.0.{43,48}, FXRuby-1.0.{25,27} on 
Linux/Intel and Solaris/Intel and WindowsXP:

I have a FOX application, everything works fine. But as soon as
I call 'exit' from within (or send a FXApp::ID_QUIT to getApp())
I get something like:

------------------------------------------------
./rootwindow.rb:133: [BUG] Segmentation fault
ruby 1.8.1 (2003-12-25) [i686-linux-gnu]

Aborted
------------------------------------------------

Since this is not a very expressive error message: 

Is this behaviour known to anyone? Any hints in which direction
I should go finding this error?

Thanks,
-- 
chris

Re: [Fxruby-users] Copying an Image with FXMemoryStream?

[Carsten E. <ca...@ci...>]

Lyle Johnson wrote:

> Based on the error message, there's probably a bug with the wrapping 
> of FXMemoryStream, and I will need to take a look. In the meantime, if 
> it's acceptable to use a temporary file you can just save the image 
> out to disk and re-load it for the copy, i.e.
>
>     # Save orig_img to a file on disk (tmpfile.jpg)
>     FXFileStream.open("tmpfile.jpg", FXStreamSave) do |stream|
>       fxsaveJPG(stream, orig_img.data.to_s, 0,
>                 orig_img.width, orig_img.height, orig_img.quality)
>     end
>
>     # Reload it and make a new FXJPGImage
>     dest_img = nil
>     File.open("tmpfile.jpg", "rb") do |file|
>       dest_img = FXJPGImage.new(app, file.read,
>                                 IMAGE_KEEP|IMAGE_SHMI|IMAGE_SHMP)
>     end

Lyle,

thanks this helps a bit (it gets my app going), but it's VERY SLOW. I'm 
writing an ImageView Widget that doesn't scroll, but scales the image 
according to the window size. This means, that with every SEL_PAINT 
message I need to copy a back_image to the front_image, you can imagine 
how slow the drawing is, when copying via files.

BTW: you can download the source code for the FXScaleImageView from 
http://carsten.circle42.com/source/ScaleImage/FXScaleImageView and a 
test program from  
http://careck.circle42.com/source/ScaleImage/TestFXScaleImageView

Re: [Fxruby-users] Copying an Image with FXMemoryStream?

[Lyle J. <jl...@cf...>]

Carsten Eckelmann wrote:

> I just can't figure out how this FXMemoryStream works. I just want to 
> (deep) copy an image in memory:

<snip>

> What am I doing wrong?

Based on the error message, there's probably a bug with the wrapping of 
FXMemoryStream, and I will need to take a look. In the meantime, if it's 
acceptable to use a temporary file you can just save the image out to 
disk and re-load it for the copy, i.e.

     # Save orig_img to a file on disk (tmpfile.jpg)
     FXFileStream.open("tmpfile.jpg", FXStreamSave) do |stream|
       fxsaveJPG(stream, orig_img.data.to_s, 0,
                 orig_img.width, orig_img.height, orig_img.quality)
     end

     # Reload it and make a new FXJPGImage
     dest_img = nil
     File.open("tmpfile.jpg", "rb") do |file|
       dest_img = FXJPGImage.new(app, file.read,
                                 IMAGE_KEEP|IMAGE_SHMI|IMAGE_SHMP)
     end

Hope this helps,

Lyle

[Fxruby-users] Re: issues with 1.0.27

[<ly...@kn...>]

On Fri, 2 Jan 2004 08:56:41 -0500, Tristan O'Tierney <tr...@ot...>
wrote :

> Hi there,
> 
> When i try and run ruby install.rb config 
> --with-fox-include=/opt/local/include
> 
> i get this error:
> config: unknown option --with-fox-include=/opt/local/include
> Try 'ruby install.rb --help' for detailed usage.

You are missing an additional "--" between the word "config" and the option
"--with-fox-include=/opt/local/include". Try this instead:

    ruby install.rb config -- --with-fox-include=/opt/local/include

and it should work.

Hope this helps,

Lyle

Re: [Fxruby-users] Open another EXE inside FXRuby?

[Lyle J. <jl...@cf...>]

Rich wrote:

> I have an EXE written in a different programming language... and I'd 
> love to use it in an FXRuby application, but I don't want to rewrite it.
> 
> I'm thinking of something along the lines of a ScrollArea, 
> HorizontalFrame, or VerticalFrame where I can set the child to be this 
> external EXE...
> 
> Can this be done?

I really doubt it, unless that application (the EXE) is an ActiveX 
control. And even then, I personally don't know how one goes about 
embedding ActiveX controls into a FOX application, although I'm pretty 
sure people have done that in the past.

[Fxruby-users] Copying an Image with FXMemoryStream?

[Carsten E. <ca...@ci...>]

Hi,

I just can't figure out how this FXMemoryStream works. I just want to 
(deep) copy an image in memory:

  def copy_img(orig_img)
    dest_img = FXJPGImage.new(getApp(), nil, 
IMAGE_KEEP|IMAGE_SHMI|IMAGE_SHMP)
    data = ""
    FXMemoryStream.new { |stream|
      stream.open(data,FXStreamSave)
      orig_img.savePixels(stream)
    }
    FXMemoryStream.new { |stream|
      stream.open(data,FXStreamLoad)
      dest_img.loadPixels(stream)
    }
    dest_img.create
    dest_img
  end

But with this code I get this error:

test.rb:25:in `open': No matching function for overloaded 
'FXMemoryStream_open' (ArgumentError)
    from /home/careck/work/test/ruby/ScaleImageView/test.rb:25:in `copy_img'

What am I doing wrong?

Cheers,
Carsten.

[Fxruby-users] Open another EXE inside FXRuby?

[Rich <ri...@li...>]

I have an EXE written in a different programming language... and I'd =
love to use it in an FXRuby application, but I don't want to rewrite it.

I'm thinking of something along the lines of a ScrollArea, =
HorizontalFrame, or VerticalFrame where I can set the child to be this =
external EXE...

Can this be done?

-Rich

Re: [Fxruby-users] FXTable manipulation

[Tom <tku...@so...>]

DOH!

Sorry...  Got it.  I'll use the stippling to highlight it instead.

Tom

Lyle Johnson wrote:

> Tom wrote:
>
>> Thanks a ton.  These solutions worked great.  BTW, Is there a way to 
>> set font color for a particular cell?
>
>
> Ummm, answered that question on this mailing list just yesterday, Tom ;)
>
>

Re: [Fxruby-users] FXTable manipulation

[Lyle J. <jl...@cf...>]

Tom wrote:

> Thanks a ton.  These solutions worked great.  BTW, Is there a way to set 
> font color for a particular cell?

Ummm, answered that question on this mailing list just yesterday, Tom ;)

Re: [Fxruby-users] FXTable manipulation

[Tom <tku...@so...>]

Lyle,

Thanks a ton.  These solutions worked great.  BTW, Is there a way to set 
font color for a particular cell?

Thanks,
Tom


Lyle Johnson wrote:

> Tom wrote:
>
>> I'm a newbie to fox and FXRuby.  I have 3 table problems I can't solve:
>>
>> 1.) I'd like to turn off the ability to select particular cells, ie 
>> the equivalent of FXTableItem.disable(). I attempt to use "disable" 
>> but keep getting the error that it's an unknown method.
>
>
> There's no direct way to disable table items, but you can intercept 
> the SEL_LEFTBUTTONPRESS and SEL_LEFTBUTTONRELEASE messages that the 
> FXTable sends to its target in order to ignore mouse clicks on certain 
> cells, e.g.
>
>     # Catch left-button press from table
>     @table.connect(SEL_LEFTBUTTONPRESS) do |sender, sel, event|
>       # Get row and column for clicked cell
>       row = @table.rowAtY(event.win_y)
>       col = @table.colAtX(event.win_x)
>
>       # If this cell is enabled, return zero (i.e. have the
>       # block evaluate to zero) so that the table's normal
>       # processing of the left-button press event will kick in.
>       # If this cell is disabled, return non-zero to indicate
>       # that we've completely handled the event; in this case,
>       # the cell shouldn't get "selected".
>       #
>       result = tableItemEnabled(row, col) ? 0 : 1
>     end
>
>     # Catch left-button release from table
>     @table.connect(SEL_LEFTBUTTONRELEASE) do |sender, sel, event|
>       # Get row and column for clicked cell
>       row = @table.rowAtY(event.win_y)
>       col = @table.colAtX(event.win_x)
>
>       # If this cell is enabled, return zero (i.e. have the
>       # block evaluate to zero) so that the table's normal
>       # processing of the left-button press event will kick in.
>       # If this cell is disabled, return non-zero to indicate
>       # that we've completely handled the event; in this case,
>       # the cell shouldn't get "selected".
>       #
>       result = tableItemEnabled(row, col) ? 0 : 1
>     end
>
>> 2.)I'd also to make it so that a click on any cell in a row selects 
>> that entire row.
>
>
> Something like this should work:
>
>     @table.connect(SEL_COMMAND) do |sender, sel, tablePos|
>       @table.setAnchorItem(tablePos.row, 0)
>       @table.extendSelection(tablePos.row, @table.numCols-1, true)
>     end
>
>> 3.)  I can't seem to figure out how to tell a particular FXTableItem 
>> how to respond to events.  What I have is a table, and several 
>> buttons outside of the table.  When the user dbl-clicks a cell, I 
>> want it to be the same thing as selecting a particular cell and 
>> hitting my "edit" button.
>
>
> Something like this should work:
>
>     @table.connect(SEL_DOUBLECLICKED) do |sender, sel, tablePos|
>       editThisCell(tablePos.row, tablePos.col)
>     end
>
> Hope this helps,
>
> Lyle 

[Fxruby-users] Re: FXRuby: Possible to specify color for single cell?

[Lyle J. <ly...@us...>]

Daniel Sperl wrote:

> Is there a way to change the color of a _single_ cell?
> Or does anyone know a workaround?

There isn't a straightforward way to do this in FOX 1.0. You could 
conceivably do it by subclassing FXTableItem and overriding its 
drawContent() method, but that is much more problematic than it should 
be. Hopefully, Jeroen will address some of these limitations in FOX 1.2.

Re: [Fxruby-users] FXTable manipulation

[Lyle J. <jl...@cf...>]

Tom wrote:

> I'm a newbie to fox and FXRuby.  I have 3 table problems I can't solve:
> 
> 1.) I'd like to turn off the ability to select particular cells, ie the 
> equivalent of FXTableItem.disable(). I attempt to use "disable" but keep 
> getting the error that it's an unknown method.

There's no direct way to disable table items, but you can intercept the 
SEL_LEFTBUTTONPRESS and SEL_LEFTBUTTONRELEASE messages that the FXTable 
sends to its target in order to ignore mouse clicks on certain cells, e.g.

     # Catch left-button press from table
     @table.connect(SEL_LEFTBUTTONPRESS) do |sender, sel, event|
       # Get row and column for clicked cell
       row = @table.rowAtY(event.win_y)
       col = @table.colAtX(event.win_x)

       # If this cell is enabled, return zero (i.e. have the
       # block evaluate to zero) so that the table's normal
       # processing of the left-button press event will kick in.
       # If this cell is disabled, return non-zero to indicate
       # that we've completely handled the event; in this case,
       # the cell shouldn't get "selected".
       #
       result = tableItemEnabled(row, col) ? 0 : 1
     end

     # Catch left-button release from table
     @table.connect(SEL_LEFTBUTTONRELEASE) do |sender, sel, event|
       # Get row and column for clicked cell
       row = @table.rowAtY(event.win_y)
       col = @table.colAtX(event.win_x)

       # If this cell is enabled, return zero (i.e. have the
       # block evaluate to zero) so that the table's normal
       # processing of the left-button press event will kick in.
       # If this cell is disabled, return non-zero to indicate
       # that we've completely handled the event; in this case,
       # the cell shouldn't get "selected".
       #
       result = tableItemEnabled(row, col) ? 0 : 1
     end

> 2.)I'd also to make it so that a click on any cell in a row selects that 
> entire row.

Something like this should work:

     @table.connect(SEL_COMMAND) do |sender, sel, tablePos|
       @table.setAnchorItem(tablePos.row, 0)
       @table.extendSelection(tablePos.row, @table.numCols-1, true)
     end

> 3.)  I can't seem to figure out how to tell a particular FXTableItem how 
> to respond to events.  What I have is a table, and several buttons 
> outside of the table.  When the user dbl-clicks a cell, I want it to be 
> the same thing as selecting a particular cell and hitting my "edit" button.

Something like this should work:

     @table.connect(SEL_DOUBLECLICKED) do |sender, sel, tablePos|
       editThisCell(tablePos.row, tablePos.col)
     end

Hope this helps,

Lyle

[Fxruby-users] FXTable manipulation

[Tom <tku...@so...>]

Hi,

I'm a newbie to fox and FXRuby.  I have 3 table problems I can't solve:

1.) I'd like to turn off the ability to select particular cells, ie the 
equivalent of FXTableItem.disable(). I attempt to use "disable" but keep 
getting the error that it's an unknown method.

2.)I'd also to make it so that a click on any cell in a row selects that 
entire row.

3.)  I can't seem to figure out how to tell a particular FXTableItem how 
to respond to events.  What I have is a table, and several buttons 
outside of the table.  When the user dbl-clicks a cell, I want it to be 
the same thing as selecting a particular cell and hitting my "edit" button.

I've grepped my way through the fox docs, hoping to find a way to do 
what I need to do, but to no avail.

Any help or pointers to help will be greatly appreciated,
Tom

Re: [Fxruby-users] FXList#makeItemVisible and ruby threads

[Joel V. <vj...@PA...>]

Joel VanderWerf wrote:
> 
> I'm updating a FXList from a thread, and I'd like to
> always scroll to the last item. This is what I tried:
> 
> require 'fox'
> include Fox
> 
> app = FXApp.new("List", "TEST")
> win = FXMainWindow.new(app, "list")
> list = FXList.new(win, 10)
> Thread.new do
>   20.times do |i|
>     list << i.to_s
> #    sleep 0.1
>     list.makeItemVisible(list.numItems-1) # no effect
>     sleep 0.1
>   end
> end
> win.show
> app.create
> app.run
> 
> As it is, the makeItemVisible has no effect, immediate or delayed. 
> However, if I uncomment the first sleep, it has an immediate effect, as 
> desired.
> 
> Does that make sense?

I guess a better question is, what is happening during that first sleep 
that I could do manually (without sleeping) to ensure that the 
makeItemVisible call has an effect? I've tried recalc, update, flush, 
forceRefresh. Overkill, I know, but all in the name of science...

Actually, I've found that Thread.pass has the same effect as sleeping, 
so I guess I'll just use that.

[Fxruby-users] Re: FXRuby API Reference Offline?

[Lyle J. <ly...@kn...>]

On Dec 22, 2003, at 12:40 PM, Christoph Gentsch wrote:

> I recently have downloaded a FOX Class Reference, but
> yours seems to be a lot better, because it mentions all
> EVENTS and LAYOUTS and so on for the widgets, you know.
> My problem is, I have no Internet at home, so is there a way
> to use your reference offline?

Yes. A tarball of the FXRuby API documentation can be downloaded from 
the SourceForge project Files list, found here:

	 http://sourceforge.net/project/showfiles.php?group_id=20243

Hope this helps,

Lyle

[Fxruby-users] Re: Hope I'm not beating a dead horse...

[<ly...@kn...>]

On Mon, 22 Dec 2003 10:48:49 -0500, "Cribbs, Jamey"
<Jam...@oa...> wrote :

> I know this has been discussed some on the mailing list, but do you 
> forsee the ability to justify IconList columns coming anytime soon?

The FOX 1.0 API is frozen (since early 2002) and since adding the capability
to right-justify icon list columns would require API changes, you will not
see this happen in FOX 1.0. This has not been added to FOX 1.2 either, but
since that version is still under development this might be a good time for
you to suggest it (on the foxgui-users mailing list). If you can make your
case for why this would be useful, and if enough people seem to be in
support of it, Jeroen might add that capability.