fix: fallback dock theme to system settings on wayland

panels/dock/dockpanel.cpp

@@ -161,8 +161,13 @@ bool DockPanel::init()
     m_theme = static_cast<ColorTheme>(Dtk::Gui::DGuiApplicationHelper::instance()->themeType());
     auto platformName = QGuiApplication::platformName();
     if (QStringLiteral("wayland") == platformName) {
-        // TODO: support get color type from wayland
         m_helper = new WaylandDockHelper(this);
+        // Fallback to DGuiApplicationHelper for theme color when wayland wallpaper color is not available.
+        // TODO: remove this when initWallpaperColorManager is re-enabled
+        QObject::connect(Dtk::Gui::DGuiApplicationHelper::instance(), &Dtk::Gui::DGuiApplicationHelper::themeTypeChanged,
+                         this, [this]() {
+            setColorTheme(static_cast<ColorTheme>(Dtk::Gui::DGuiApplicationHelper::instance()->themeType()));
+        });
     } else if (QStringLiteral("xcb") == platformName) {
         QObject::connect(Dtk::Gui::DGuiApplicationHelper::instance(), &Dtk::Gui::DGuiApplicationHelper::themeTypeChanged,
                             this, [this](){

panels/dock/waylanddockhelper.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2024 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2024 - 2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -22,26 +22,12 @@ WaylandDockHelper::WaylandDockHelper(DockPanel *panel)
     , m_isCurrentActiveWindowFullscreened(false)
     , m_panel(panel)
 {
-    m_wallpaperColorManager.reset(new WallpaperColorManager(this));
     m_ddeShellManager.reset(new TreeLandDDEShellManager());
     DS_NAMESPACE::DAppletBridge bridge("org.deepin.ds.dock.taskmanager");
     if (auto applet = bridge.applet()) {
         connect(applet, SIGNAL(windowFullscreenChanged(bool)), this, SLOT(setCurrentActiveWindowFullscreened(bool)));
     }
 
-    connect(m_panel, &DockPanel::rootObjectChanged, this, [this]() {
-        m_wallpaperColorManager->watchScreen(dockScreenName());
-    });
-
-    connect(m_wallpaperColorManager.get(), &WallpaperColorManager::activeChanged, this, [this]() {
-        if (m_panel->rootObject() != nullptr) {
-            m_wallpaperColorManager->watchScreen(dockScreenName());
-        }
-    });
-
-    connect(m_panel, &DockPanel::dockScreenChanged, this, [this]() {
-        m_wallpaperColorManager->watchScreen(dockScreenName());
-    });
 
     connect(m_panel, &DockPanel::positionChanged, this, &WaylandDockHelper::updateOverlapCheckerPos);
     connect(m_panel, &DockPanel::dockSizeChanged, this, &WaylandDockHelper::updateOverlapCheckerPos);
@@ -65,9 +51,6 @@ WaylandDockHelper::WaylandDockHelper(DockPanel *panel)
         }
     });
 
-    if (m_panel->rootObject() != nullptr) {
-        m_wallpaperColorManager->watchScreen(dockScreenName());
-    }
 }
 
 void WaylandDockHelper::updateOverlapCheckerPos()
@@ -139,6 +122,29 @@ bool WaylandDockHelper::isWindowOverlap()
     return m_isWindowOverlap;
 }
 
+void WaylandDockHelper::initWallpaperColorManager()
+{
+    m_wallpaperColorManager.reset(new WallpaperColorManager(this));
+
+    connect(m_panel, &DockPanel::rootObjectChanged, this, [this]() {
+        m_wallpaperColorManager->watchScreen(dockScreenName());
+    });
+
+    connect(m_wallpaperColorManager.get(), &WallpaperColorManager::activeChanged, this, [this]() {
+        if (m_panel->rootObject() != nullptr) {
+            m_wallpaperColorManager->watchScreen(dockScreenName());
+        }
+    });
+
+    connect(m_panel, &DockPanel::dockScreenChanged, this, [this]() {
+        m_wallpaperColorManager->watchScreen(dockScreenName());
+    });
+
+    if (m_panel->rootObject() != nullptr) {
+        m_wallpaperColorManager->watchScreen(dockScreenName());
+    }
+}
+
 void WaylandDockHelper::setDockColorTheme(const ColorTheme &theme)
 {
     m_panel->setColorTheme(theme);

panels/dock/waylanddockhelper.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2024 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2024 - 2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 #pragma once
@@ -42,6 +42,7 @@ protected Q_SLOTS:
 
 private:
     void updateOverlapCheckerPos();
+    void initWallpaperColorManager();
 
 private:
     friend class TreeLandWindowOverlapChecker;