[ui] unify floating logo hand cursors with arrow fallback

apps/desktop/src/gui/application/gui_application.cpp

@@ -71,6 +71,7 @@
 #elif (defined(__linux__) && !defined(__OHOS__))
 #include <GL/gl.h>
 #include <X11/Xatom.h>
+#include <X11/Xcursor/Xcursor.h>
 #include <X11/Xlib.h>
 #include <unistd.h>
 
@@ -100,6 +101,41 @@ namespace {
 
 using namespace std::chrono_literals;
 
+bool SupportsControlHandCursor([[maybe_unused]] const slint::Window& window) {
+#if defined(_WIN32)
+  return LoadCursorW(nullptr, IDC_HAND) != nullptr;
+#elif defined(__linux__) && !defined(__OHOS__)
+  // Match winit's pointer aliases, without using any move/grab fallback.
+  constexpr const char* names[] = {"pointer", "hand2", "hand1", "hand",
+                                  "pointing_hand"};
+  if (window.wayland_surface()) {
+    const char* theme = std::getenv("XCURSOR_THEME");
+    for (const char* name : names) {
+      if (auto* images = XcursorLibraryLoadImages(name, theme, 24)) {
+        const bool available = images->nimage > 0;
+        XcursorImagesDestroy(images);
+        if (available) return true;
+      }
+    }
+    return false;
+  }
+  std::unique_ptr<Display, decltype(&XCloseDisplay)> display{
+      XOpenDisplay(nullptr), XCloseDisplay};
+  if (!display) return false;
+  for (const char* name : names) {
+    const Cursor cursor = XcursorLibraryLoadCursor(display.get(), name);
+    if (cursor != None) {
+      XFreeCursor(display.get(), cursor);
+      return true;
+    }
+  }
+  return false;
+#else
+  // AppKit supplies pointingHandCursor; other adapters resolve pointer.
+  return true;
+#endif
+}
+
 std::optional<std::string> GenerateRandomPassword(std::string_view current) {
   constexpr std::string_view alphabet =
       "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
@@ -3640,6 +3676,8 @@ void GuiApplication::SyncStreamWindow() {
   if (!has_sessions) need_to_create_stream_window_ = false;
   if (need_to_create_stream_window_ && !ui_->stream) {
     ui_->stream.emplace(ui::StreamWindow::create());
+    (*ui_->stream)->set_control_hand_cursor_supported(
+        SupportsControlHandCursor(ui_->main->window()));
 #if (defined(__linux__) && !defined(__OHOS__))
     (*ui_->stream)->set_custom_titlebar(use_xwayland_gui_);
 #endif

apps/desktop/src/gui/ui/stream_window.slint

@@ -102,6 +102,7 @@ component ControlBarButton inherits Rectangle {
     in property <bool> show-logo: false;
     in property <bool> logo-pressed: false;
     in property <bool> logo-dragging: false;
+    in property <bool> hand-cursor-supported: true;
     in property <float> reveal-progress: 1;
     in property <string> badge: "";
     in property <string> tooltip: "";
@@ -227,7 +228,7 @@ component ControlBarButton inherits Rectangle {
     }
 
     touch := TouchArea {
-        mouse-cursor: !root.action-enabled ? default : root.show-logo ? (root.logo-pressed ? grabbing : grab) : pointer;
+        mouse-cursor: root.action-enabled && root.hand-cursor-supported ? pointer : default;
         scroll-event(event) => { accept }
         pointer-event(event) => {
             root.pointer-input(event.button, event.kind, self.mouse-x, self.mouse-y);
@@ -285,6 +286,7 @@ export component StreamWindow inherits Window {
     default-font-size: ImGuiFontStyle.base;
 
     in property <bool> custom-titlebar: false;
+    in property <bool> control-hand-cursor-supported: true;
     in property <bool> native-video-enabled: false;
     // Export the actual input surface in logical pixels. Native rendering and
     // input mapping must follow the same layout, including title and tab bars.
@@ -1073,7 +1075,8 @@ export component StreamWindow inherits Window {
             // The logo also retains a stable owner if another button is used.
             if root.remote-pointer-active || root.control-drag-pending: TouchArea {
                 z: 15;
-                mouse-cursor: root.control-drag-pending ? MouseCursor.grabbing
+                mouse-cursor: root.control-drag-pending
+                    ? (root.control-hand-cursor-supported ? MouseCursor.pointer : MouseCursor.default)
                     : root.remote-cursor-active ? RemoteCursor.shape(root.remote-cursor-shape)
                     : MouseCursor.default;
                 pointer-event(event) => {
@@ -1249,6 +1252,7 @@ export component StreamWindow inherits Window {
                     width: root.control-toolbar-height;
                     height: root.control-toolbar-height;
                     show-logo: true;
+                    hand-cursor-supported: root.control-hand-cursor-supported;
                     logo-pressed: root.control-drag-pending;
                     logo-dragging: self.logo-pressed && root.control-dragging;
                     tooltip: root.control-expanded ? StreamStrings.collapse-control : StreamStrings.expand-control;