Use KDE's icon engine

It has KDE color schemes support that prevents dark icons on dark background
trialuser02 · Oct 20, 2024 · ff3e831 · ff3e831
1 parent 4012018
commit ff3e831
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Showing 4 changed files with 18 additions and 2 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -27,6 +27,7 @@ add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x060000 -DUSE_WIDGETS)
 find_package(Qt6 REQUIRED COMPONENTS BuildInternals Core Widgets OPTIONAL_COMPONENTS QuickControls2 LinguistTools)
 find_package(KF6Config)
 find_package(KF6ColorScheme)
+find_package(KF6IconThemes)
 
 get_target_property(QT_QTPATHS_EXECUTABLE Qt6::qtpaths IMPORTED_LOCATION)
 

diff --git a/src/qt6ct-qtplugin/CMakeLists.txt b/src/qt6ct-qtplugin/CMakeLists.txt
@@ -9,5 +9,6 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../)
 
 add_library(qt6ct-qtplugin MODULE ${app_SRCS})
 set_target_properties(qt6ct-qtplugin PROPERTIES OUTPUT_NAME qt6ct)
-target_link_libraries(qt6ct-qtplugin PRIVATE Qt6::Widgets Qt6::GuiPrivate $<TARGET_NAME_IF_EXISTS:Qt6::QuickControls2> qt6ct-common)
+target_link_libraries(qt6ct-qtplugin PRIVATE Qt6::Widgets Qt6::GuiPrivate $<TARGET_NAME_IF_EXISTS:Qt6::QuickControls2> $<TARGET_NAME_IF_EXISTS:KF6::IconThemes> qt6ct-common)
+target_compile_definitions(qt6ct-qtplugin PRIVATE $<$<BOOL:${KF6IconThemes_FOUND}>:KF_ICONTHEMES_LIB>)
 install(TARGETS qt6ct-qtplugin DESTINATION ${PLUGINDIR}/platformthemes)
diff --git a/src/qt6ct-qtplugin/qt6ctplatformtheme.cpp b/src/qt6ct-qtplugin/qt6ctplatformtheme.cpp
@@ -55,6 +55,11 @@
 #include <QStringList>
 #include <qpa/qplatformthemefactory_p.h>
 
+#ifdef KF_ICONTHEMES_LIB
+#include <KIconEngine>
+#include <KIconLoader>
+#endif
+
 Q_LOGGING_CATEGORY(lqt6ct, "qt6ct", QtWarningMsg)
 
 //QT_QPA_PLATFORMTHEME=qt6ct
@@ -160,6 +165,13 @@ QIcon Qt6CTPlatformTheme::fileIcon(const QFileInfo &fileInfo, QPlatformTheme::Ic
     return QIcon::fromTheme(type.iconName());
 }
 
+#ifdef KF_ICONTHEMES_LIB
+QIconEngine *Qt6CTPlatformTheme::createIconEngine(const QString &iconName) const
+{
+    return new KIconEngine(iconName, KIconLoader::global());
+}
+#endif
+
 void Qt6CTPlatformTheme::applySettings()
 {
     if(!QGuiApplication::desktopSettingsAware() || m_isIgnored)

diff --git a/src/qt6ct-qtplugin/qt6ctplatformtheme.h b/src/qt6ct-qtplugin/qt6ctplatformtheme.h
@@ -62,7 +62,9 @@ class Qt6CTPlatformTheme : public QObject, public QGenericUnixTheme
     //virtual QPixmap fileIconPixmap(const QFileInfo &fileInfo, const QSizeF &size,
     //                               QPlatformTheme::IconOptions iconOptions = 0) const;
 
-    //virtual QIconEngine *createIconEngine(const QString &iconName) const;
+#ifdef KF_ICONTHEMES_LIB
+    virtual QIconEngine *createIconEngine(const QString &iconName) const override;
+#endif
     //virtual QList<QKeySequence> keyBindings(QKeySequence::StandardKey key) const;
     //virtual QString standardButtonText(int button) const;