How does Qt6 style its controls on haiku

bog_dan_ro · September 17, 2026, 2:36pm

Hello there,

I could not find any Qt6 Haiku specific QStyle plugin, so how does it work?
I found GitHub - threedeyes/qthaikuplugins: Qt5 plugins for haiku platform · GitHub but this one targets Qt5 not Qt6.

3dEyes · September 17, 2026, 3:07pm

Begasus · September 17, 2026, 4:21pm

There is also a small patch included in qt6_base, @3dEyes maybe this could be upstreamed? (or improved if needed)

github.com/haikuports/haikuports

dev-qt/qt6-base/patches/qt6_base-6.10.3-source2.patchset

master

From 227d8f48538fa21d5d3f4b75951899081783ebde Mon Sep 17 00:00:00 2001
From: Luc Schrijvers <begasus@gmail.com>
Date: Sat, 26 Apr 2025 10:50:40 +0200
Subject: Build fix


diff --git a/src/platform/qhaikuplatformfontdatabase.cpp b/src/platform/qhaikuplatformfontdatabase.cpp
index bdf8875..637427e 100644
--- a/src/platform/qhaikuplatformfontdatabase.cpp
+++ b/src/platform/qhaikuplatformfontdatabase.cpp
@@ -133,7 +133,7 @@ void QHaikuPlatformFontDatabase::populateFontDatabase()
 QStringList	QHaikuPlatformFontDatabase::fallbacksForFamily(const QString &family,
 															QFont::Style style,
 															QFont::StyleHint styleHint,
-															QChar::Script script) const
+															QFontDatabasePrivate::ExtendedScript script) const
 {
 	QStringList result;
 	if (styleHint == QFont::Monospace || styleHint	== QFont::Courier) {
diff --git a/src/platform/qhaikuplatformfontdatabase.h b/src/platform/qhaikuplatformfontdatabase.h

This file has been truncated. show original

EDIT: this still works OK in Qt6-6.11.2.

bog_dan_ro · September 17, 2026, 5:15pm

Thanks a lot!