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Welcome to the Fast Light Tool Kit core developer's discussion group.
This group is where developers discuss development of the FLTK core library.
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Manolo, … melcher....@googlemail.com5

12:21 PM

What C++11 features are allowed in FLTK?

Nice idea! I'd suggest `#include <FL/Box>`, but since we don't go there anyway. I have

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What C++11 features are allowed in FLTK?

Nice idea! I'd suggest `#include <FL/Box>`, but since we don't go there anyway. I have

12:21 PM

Greg Ercolano, Albrecht Schlosser3

Oct 10

'make html' error/warning

On 10/9/25 12:23, 'Albrecht Schlosser' via fltk.coredev wrote: On 10/9/25 20:19 Greg Ercolano

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'make html' error/warning

On 10/9/25 12:23, 'Albrecht Schlosser' via fltk.coredev wrote: On 10/9/25 20:19 Greg Ercolano

Oct 10

Sep 19

FLTK 1.4 will be in Ubuntu 25.10 "Questing Quokka" 25.10 when released

I've upgraded my Ubuntu 25.04 to 25.10 beta and noticed FLTK 1.4.3 is available there as a

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FLTK 1.4 will be in Ubuntu 25.10 "Questing Quokka" 25.10 when released

I've upgraded my Ubuntu 25.04 to 25.10 beta and noticed FLTK 1.4.3 is available there as a

Sep 19

df7...@gmail.com, … Albrecht Schlosser4

Aug 21

fluid syntax error cross build amd64 on i386

This is all good info, for now I had just removed the items from DIRS that I didn't need, that

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fluid syntax error cross build amd64 on i386

This is all good info, for now I had just removed the items from DIRS that I didn't need, that

Aug 21

Gonzalo Garramuño, Manolo3

Aug 3

pixels_per_unit question

On 8/2/2025 3:08 PM, Manolo wrote: > Function Fl_Screen_Driver::open_display() > calls

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pixels_per_unit question

On 8/2/2025 3:08 PM, Manolo wrote: > Function Fl_Screen_Driver::open_display() > calls

Aug 3

Gonzalo Garramuño, … Bill Spitzak5

Jul 20

Threading windows' drawing

On 7/17/2025 1:54 PM, 'Albrecht Schlosser' via fltk.coredev wrote: > Re: [fltk.coredev]

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Threading windows' drawing

On 7/17/2025 1:54 PM, 'Albrecht Schlosser' via fltk.coredev wrote: > Re: [fltk.coredev]

Jul 20

Albrecht Schlosser

Jul 20

FLTK 1.4.4 released on July 20, 2025

We are pleased to announce the release of FLTK 1.4.4. This is a maintenance release with bug fixes

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FLTK 1.4.4 released on July 20, 2025

We are pleased to announce the release of FLTK 1.4.4. This is a maintenance release with bug fixes

Jul 20

Albrecht Schlosser

Jul 15

RFC: Preparation of release 1.4.4

Dear FLTK devs, please take a look at GitHub Issue #1281 and add your comments https://github.com/

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RFC: Preparation of release 1.4.4

Dear FLTK devs, please take a look at GitHub Issue #1281 and add your comments https://github.com/

Jul 15

Gonzalo Garramuño, … Albrecht Schlosser11

Jul 6

Recent commit in Fl_Help_View.H by Matt introduces problems with some compilers

El 6/7/25 a las 12:02, 'Albrecht Schlosser' via fltk.coredev escribió: > What is the

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Recent commit in Fl_Help_View.H by Matt introduces problems with some compilers

El 6/7/25 a las 12:02, 'Albrecht Schlosser' via fltk.coredev escribió: > What is the

Jul 6

Gonzalo Garramuño

Jun 24

Two technical Vulkan questions for those in the know

1) Can VMA be run on macOS? 2) Is MoltenVK still restricted to MoltenVK 1.2? -- ggar...@gmail.com

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Two technical Vulkan questions for those in the know

1) Can VMA be run on macOS? 2) Is MoltenVK still restricted to MoltenVK 1.2? -- ggar...@gmail.com

Jun 24

Greg Ercolano, … Albrecht Schlosser3

Jun 23

Fl::awake() docs example

On 6/22/25 19:10 imm wrote: On Sun, 22 Jun 2025, 17:44 Greg wrote: It made sense to put this below

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Fl::awake() docs example

On 6/22/25 19:10 imm wrote: On Sun, 22 Jun 2025, 17:44 Greg wrote: It made sense to put this below

Jun 23

Jun 22

'make html' warnings in master branch

Just cloned the repo, getting these warnings from 'make html' on the master branch:

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'make html' warnings in master branch

Just cloned the repo, getting these warnings from 'make html' on the master branch:

Jun 22

Manolo, Albrecht Schlosser3

Jun 13

About FLTK and macOS 26 "Tahoe"

The problem in titlebar capture under macOS Tahoe has been fixed (3d13dfe).

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About FLTK and macOS 26 "Tahoe"

The problem in titlebar capture under macOS Tahoe has been fixed (3d13dfe).

Jun 13

melcher....@googlemail.com, … Albrecht Schlosser35

May 21

Please vote for Core Add-Ons

On 5/21/25 11:33 Manolo wrote: Le mercredi 21 mai 2025 à 09:58:19 UTC+2, Manolo a écrit : Matthias:

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Please vote for Core Add-Ons

On 5/21/25 11:33 Manolo wrote: Le mercredi 21 mai 2025 à 09:58:19 UTC+2, Manolo a écrit : Matthias:

May 21

Manolo, … Albrecht Schlosser12

May 8

Please vote about addition of class Fl_Native_Input to FLTK 1.5

Le mercredi 7 mai 2025 à 09:42:13 UTC+2, Manolo a écrit : Le mardi 6 mai 2025 à 11:57:07 UTC+2,

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Please vote about addition of class Fl_Native_Input to FLTK 1.5

Le mercredi 7 mai 2025 à 09:42:13 UTC+2, Manolo a écrit : Le mardi 6 mai 2025 à 11:57:07 UTC+2,

May 8

Albrecht Schlosser

Apr 29

FLTK 1.4.3 released on April 29, 2025

We are pleased to announce the release of FLTK 1.4.3 This is a maintenance release with bug fixes and

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FLTK 1.4.3 released on April 29, 2025

We are pleased to announce the release of FLTK 1.4.3 This is a maintenance release with bug fixes and

Apr 29

melcher....@googlemail.com, … Albrecht Schlosser13

Apr 3

FLTK 1.5 and SDL3

On 4/3/25 13:55 schrieb 'melcher....@googlemail.com' via fltk.coredev wrote: Albrecht-S

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FLTK 1.5 and SDL3

On 4/3/25 13:55 schrieb 'melcher....@googlemail.com' via fltk.coredev wrote: Albrecht-S

Apr 3

imacarthur, Albrecht Schlosser3

Mar 18

Windows Defender false positives from fltk-1.4 with mingw32/gcc-9.2 on WIn11

On Monday, 17 March 2025 at 18:15:04 UTC Albrecht-S wrote: On 3/17/25 10:40 imacarthur wrote: So I

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Windows Defender false positives from fltk-1.4 with mingw32/gcc-9.2 on WIn11

On Monday, 17 March 2025 at 18:15:04 UTC Albrecht-S wrote: On 3/17/25 10:40 imacarthur wrote: So I

Mar 18

imacarthur, Albrecht Schlosser14

Mar 15

1.5.0 build failure with 32-bit mingw

On 3/14/25 12:07 imacarthur wrote: On Thursday, 13 March 2025 at 18:11:46 UTC Albrecht-S wrote: No

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1.5.0 build failure with 32-bit mingw

On 3/14/25 12:07 imacarthur wrote: On Thursday, 13 March 2025 at 18:11:46 UTC Albrecht-S wrote: No

Mar 15

melcher....@googlemail.com

Mar 7

Sorry for so many changes spread over the day. That was not the smartest approach. I hope I did not

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Sorry for so many changes spread over the day. That was not the smartest approach. I hope I did not

Mar 7

Albrecht Schlosser, … Greg Ercolano5

Mar 7

Git `master` is now FLTK 1.5

On 3/7/25 18:23 Greg Ercolano wrote: I removed most mentions of Fl_String and replaced everything

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Git `master` is now FLTK 1.5

On 3/7/25 18:23 Greg Ercolano wrote: I removed most mentions of Fl_String and replaced everything

Mar 7

Albrecht Schlosser, … Manolo62

Mar 4

[RFC] FLTK 1.4 maintenance mode and 1.5 development

Here is what I get using Xcode 16's compiler on macOS 15: /Library/Developer/CommandLineTools/usr

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[RFC] FLTK 1.4 maintenance mode and 1.5 development

Here is what I get using Xcode 16's compiler on macOS 15: /Library/Developer/CommandLineTools/usr

Mar 4

Albrecht Schlosser

Feb 23

FLTK 1.4.2 released on Feb. 23, 2025

We are pleased to announce the release of FLTK 1.4.2 This is a maintenance release with bug fixes and

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FLTK 1.4.2 released on Feb. 23, 2025

We are pleased to announce the release of FLTK 1.4.2 This is a maintenance release with bug fixes and

Feb 23

Albrecht Schlosser4

Feb 23

FLTK 1.4.2 Release Schedule

Release 1.4.2 done today (Feb. 23, 2025) https://www.fltk.org/articles.php?L1972 https://github.com/

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FLTK 1.4.2 Release Schedule

Release 1.4.2 done today (Feb. 23, 2025) https://www.fltk.org/articles.php?L1972 https://github.com/

Feb 23

Christian, Albrecht Schlosser5

Feb 18

Loading images from resources.rc

On 2/18/25 19:05 Christian wrote: Thank you I had no idea fluid supported adding binary data directly

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Loading images from resources.rc

On 2/18/25 19:05 Christian wrote: Thank you I had no idea fluid supported adding binary data directly

Feb 18

Evan Laforge, … Manolo6

Feb 14

oddities on os x sequoia

> > 2025-02-07 18:48:00.601 logview[17665:1231533] +[IMKClient subclass]: > > chose

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oddities on os x sequoia

> > 2025-02-07 18:48:00.601 logview[17665:1231533] +[IMKClient subclass]: > > chose

Feb 14

Christian, … imacarthur4

Feb 13

Use Vi for Code View / Editing Code in Fluid

Seems to me this might be "non-trivial" though... The "forward conversion" from

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Use Vi for Code View / Editing Code in Fluid

Seems to me this might be "non-trivial" though... The "forward conversion" from

Feb 13

Albrecht Schlosser

Feb 5

FLTK 1.3.11 released on Feb. 05, 2025

We are pleased to announce the release of FLTK 1.3.11. FLTK 1.3.11 is a maintenance release with bug

unread,

FLTK 1.3.11 released on Feb. 05, 2025

We are pleased to announce the release of FLTK 1.3.11. FLTK 1.3.11 is a maintenance release with bug

Feb 5

Albrecht Schlosser, Daniel Harding6

12/12/24

FLTK 1.4.1 released on Dec. 12, 2024

On 12/12/24 23:42 'Albrecht Schlosser' via fltk.coredev wrote: On 12/12/24 20:35 '

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FLTK 1.4.1 released on Dec. 12, 2024

On 12/12/24 23:42 'Albrecht Schlosser' via fltk.coredev wrote: On 12/12/24 20:35 '

12/12/24

Rob McDonald, … melcher....@googlemail.com10

12/3/24

Crash on startup.

rob.am..@gmail.com schrieb am Dienstag, 3. Dezember 2024 um 09:12:22 UTC+1: I call Fl_Tabs::

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Crash on startup.

rob.am..@gmail.com schrieb am Dienstag, 3. Dezember 2024 um 09:12:22 UTC+1: I call Fl_Tabs::

12/3/24

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