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Welcome to the Fast Light Tool Kit general discussion group.
This is for general discussions about the FLTK library; questions, problems compiling/installing, etc.
This group is mirrored at fltk.org for read access via NNTP and web browsing.

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Gonzalo Garramuño

4:33 PM

Unicode question

Since Matt is our C++ expert and Albretch is our Unicode one. Is there a way in FLTK to replace with

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Unicode question

Since Matt is our C++ expert and Albretch is our Unicode one. Is there a way in FLTK to replace with

4:33 PM

david allen, Albrecht Schlosser5

2:42 PM

Error linking FLTK-Cairo program

This solved the problem: target_link_libraries(trial-02 PUBLIC cairo-code # <<< needs to be

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Error linking FLTK-Cairo program

This solved the problem: target_link_libraries(trial-02 PUBLIC cairo-code # <<< needs to be

2:42 PM

ed.vi...@gmail.com, … Matthias Melcher10

Nov 21

Change font size in fluid

1.4.0 will certainly work. Please check your versions. The only thing that was improved for app

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Change font size in fluid

1.4.0 will certainly work. Please check your versions. The only thing that was improved for app

Nov 21

Klaus Rudolph, … Manolo16

Nov 18

fltk 1.5 on linux configured with -D FLTK_GRAPHICS_CAIRO=ON leaves FLTK_HAVE_CAIRO unset

Le lundi 17 novembre 2025 à 20:00:34 UTC+1, Klaus Rudolph a écrit : Did fl_draw() not draw with cairo

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fltk 1.5 on linux configured with -D FLTK_GRAPHICS_CAIRO=ON leaves FLTK_HAVE_CAIRO unset

Le lundi 17 novembre 2025 à 20:00:34 UTC+1, Klaus Rudolph a écrit : Did fl_draw() not draw with cairo

Nov 18

holm.h...@gmail.com, … Matthias Melcher6

Nov 17

focus to subwindows

Ian MacArthur schrieb am Montag, 17. November 2025 um 12:03:38 UTC+1: On Monday, 17 November 2025 at

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focus to subwindows

Ian MacArthur schrieb am Montag, 17. November 2025 um 12:03:38 UTC+1: On Monday, 17 November 2025 at

Nov 17

Jeff Paranich, … Manolo3

Nov 14

FLTK_OPTION_PRINT_SUPPORT=OFF still requires linking winspool

Option FLTK_OPTION_PRINT_SUPPORT=OFF has an effect only under Linux/Unix where it removes the source

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FLTK_OPTION_PRINT_SUPPORT=OFF still requires linking winspool

Option FLTK_OPTION_PRINT_SUPPORT=OFF has an effect only under Linux/Unix where it removes the source

Nov 14

Gonzalo Garramuño, Greg Ercolano2

Nov 10

Clarification on macOS bundle and exec icon on taskbar

On 11/10/25 14:23, Gonzalo Garramuño wrote: Two questions: 1) According to some AI familiar with

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Clarification on macOS bundle and exec icon on taskbar

On 11/10/25 14:23, Gonzalo Garramuño wrote: Two questions: 1) According to some AI familiar with

Nov 10

Klaus Rudolph, … Manolo12

Nov 9

transparency for drawing in fltk 1.5 on linux with X11/wayland

It's very difficult to detail in few words the effect and the default values of build option

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transparency for drawing in fltk 1.5 on linux with X11/wayland

It's very difficult to detail in few words the effect and the default values of build option

Nov 9

Klaus Rudolph, … imm7

Nov 9

multi touch support

On Sun, 9 Nov 2025, 10:52 'Klaus Rudolph' wrote: Thanks for the replies! Maybe to get a

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multi touch support

On Sun, 9 Nov 2025, 10:52 'Klaus Rudolph' wrote: Thanks for the replies! Maybe to get a

Nov 9

david allen, Matthias Melcher2

Nov 9

Doc bug for fl_filename_ext

Fixed in d12d16f6abd2b414401007e0f975f369b5262097 . Please use https://github.com/fltk/fltk/issues .

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Doc bug for fl_filename_ext

Fixed in d12d16f6abd2b414401007e0f975f369b5262097 . Please use https://github.com/fltk/fltk/issues .

Nov 9

pvr...@btinternet.com, Albrecht Schlosser6

Nov 7

Using CMake to build under MSVC.

On 11/7/25 11:18 'pvr...@btinternet.com' via fltk.general wrote: If I try and build my app

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Using CMake to build under MSVC.

On 11/7/25 11:18 'pvr...@btinternet.com' via fltk.general wrote: If I try and build my app

Nov 7

Gonzalo Garramuño, Manolo3

Nov 6

FLTK Wayland application under KDE Plasma

On 11/6/2025 10:29 AM, Manolo wrote: > The mrv2 discussions says > "You found a really

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FLTK Wayland application under KDE Plasma

On 11/6/2025 10:29 AM, Manolo wrote: > The mrv2 discussions says > "You found a really

Nov 6

Klaus Rudolph, … Albrecht Schlosser8

Nov 1

setting font in fltk

On 11/1/25 15:31 'Klaus Rudolph' via fltk.general wrote: See above. If you build the library

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setting font in fltk

On 11/1/25 15:31 'Klaus Rudolph' via fltk.general wrote: See above. If you build the library

Nov 1

Roger Tunnicliffe, … Albrecht Schlosser8

Oct 31

Undefined Reference - on.. well, just about everything

Thx Albrecht I found what was required. These are the additional libraries I needed to link (for this

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Undefined Reference - on.. well, just about everything

Thx Albrecht I found what was required. These are the additional libraries I needed to link (for this

Oct 31

Roger Tunnicliffe, Albrecht Schlosser2

Oct 31

On 10/31/25 21:46 Roger Tunnicliffe wrote: > I seem to remember doing this a few years ago but

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On 10/31/25 21:46 Roger Tunnicliffe wrote: > I seem to remember doing this a few years ago but

Oct 31

Klaus Rudolph, Albrecht Schlosser4

Oct 26

seg fault with fl_draw fltk1.4.4

On 10/26/25 16:43 'Klaus Rudolph' wrote: Albrecht-S schrieb am Sonntag, 26. Oktober 2025 um

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seg fault with fl_draw fltk1.4.4

On 10/26/25 16:43 'Klaus Rudolph' wrote: Albrecht-S schrieb am Sonntag, 26. Oktober 2025 um

Oct 26

Klaus Rudolph, imm2

Oct 26

crash in fl_draw

With the caveat that I'm on my phone and haven't actually tested your example.... On Sun, 26

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crash in fl_draw

With the caveat that I'm on my phone and haven't actually tested your example.... On Sun, 26

Oct 26

Gonzalo Garramuño, Matthias Melcher3

Oct 25

Creating a tooltip programmatically at a certain screen position

Oh, and you can also get the FL_BEFORE_TOLTIP event for any widget. It gives you the opportunity to

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Creating a tooltip programmatically at a certain screen position

Oh, and you can also get the FL_BEFORE_TOLTIP event for any widget. It gives you the opportunity to

Oct 25

Paul Hahn, Matthias Melcher4

Oct 24

Fl_Plugin question

pauldou...@gmail.com schrieb am Donnerstag, 23. Oktober 2025 um 23:54:35 UTC+2: FYI I have just

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Fl_Plugin question

pauldou...@gmail.com schrieb am Donnerstag, 23. Oktober 2025 um 23:54:35 UTC+2: FYI I have just

Oct 24

Oct 23

ProgressBar Indeterminate Mode?

Does the FL_Progress have an option to make it indeterminate. My thinking on this is it would simple

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ProgressBar Indeterminate Mode?

Does the FL_Progress have an option to make it indeterminate. My thinking on this is it would simple

Oct 23

Sep 11

Fl_Slider events after deactivate()

Unsurprisingly, this was an issue on my end. Rob On Wednesday, September 10, 2025 at 4:12:51 PM UTC-7

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Fl_Slider events after deactivate()

Unsurprisingly, this was an issue on my end. Rob On Wednesday, September 10, 2025 at 4:12:51 PM UTC-7

Sep 11

Eric Sokolowsky

Sep 10

Sensitivity for touch screens

I'm writing an application with FLTK 1.4.4 that is primarily intended to be run on a touch screen

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Sensitivity for touch screens

I'm writing an application with FLTK 1.4.4 that is primarily intended to be run on a touch screen

Sep 10

Eric Sokolowsky, Albrecht Schlosser5

Sep 10

Customizing the look of Fl_Scroll

Albrecht, This sounds like a good approach. I can share parts of my code. Note that I don't have

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Customizing the look of Fl_Scroll

Albrecht, This sounds like a good approach. I can share parts of my code. Note that I don't have

Sep 10

Basile Starynkevitch, … Manolo3

Sep 10

mention how to compile FLTK 1.5 on Linux as shared library with debug and optimization

Le mardi 9 septembre 2025 à 11:03:54 UTC+2, bas...@starynkevitch.net a écrit : Please mention on the

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mention how to compile FLTK 1.5 on Linux as shared library with debug and optimization

Le mardi 9 septembre 2025 à 11:03:54 UTC+2, bas...@starynkevitch.net a écrit : Please mention on the

Sep 10

Gonzalo Garramuño, Matthias Melcher2

Sep 5

FLUID: How can I make Live Resize work?

The Live Resize feature is meant as a verification for setting the resizable hierarchy correctly for

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FLUID: How can I make Live Resize work?

The Live Resize feature is meant as a verification for setting the resizable hierarchy correctly for

Sep 5

Aug 30

fltk.org server slowness

We were having some pretty slow page loads on fltk.org. This was hopefully solved this morning (Sat

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fltk.org server slowness

We were having some pretty slow page loads on fltk.org. This was hopefully solved this morning (Sat

Aug 30

Gonzalo Garramuño, … Matthias Melcher8

Aug 23

Handling composed key for international text

„Compare“ originates from OS's that use several keystrokes to write one character. For example,

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Handling composed key for international text

„Compare“ originates from OS's that use several keystrokes to write one character. For example,

Aug 23

danielc...@gmail.com, … Gonzalo Garramuño10

Aug 22

fltk resizable fixed height

El 22/8/25 a las 15:35, 'Albrecht Schlosser' via fltk.general escribió: If there are other

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fltk resizable fixed height

El 22/8/25 a las 15:35, 'Albrecht Schlosser' via fltk.general escribió: If there are other

Aug 22

Daniel G., Manolo3

Aug 14

Remove border/shadow of Fl_Choice.H widget

Thank you for your help, not satisfying but works well! :) Manolo schrieb am Donnerstag, 14. August

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Remove border/shadow of Fl_Choice.H widget

Thank you for your help, not satisfying but works well! :) Manolo schrieb am Donnerstag, 14. August

Aug 14

duncan gibson, … Greg Ercolano4

Aug 12

C++ Weekly - Ep 493 - C++ GUI Quick Start with FLTK

On 8/12/25 03:04, Ian MacArthur wrote: I'm slightly "confused" by the conjunction of

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C++ Weekly - Ep 493 - C++ GUI Quick Start with FLTK

On 8/12/25 03:04, Ian MacArthur wrote: I'm slightly "confused" by the conjunction of

Aug 12

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