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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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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

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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

Albrecht Schlosser

11/26/24

FLTK Release Hosting

All FYI, after the recent releases we had trouble with our FLTK server slowing down massively. This

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FLTK Release Hosting

All FYI, after the recent releases we had trouble with our FLTK server slowing down massively. This

11/26/24

Albrecht Schlosser

11/17/24

FLTK 1.4.0 released on Nov. 17, 2024

We are pleased to announce the release of FLTK 1.4.0. FLTK 1.4.0 is a new release with major

unread,

FLTK 1.4.0 released on Nov. 17, 2024

We are pleased to announce the release of FLTK 1.4.0. FLTK 1.4.0 is a new release with major

11/17/24

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