LinuxComponentPeer: Properly transform coordinates into peer space when collision testing

modules/juce_gui_basics/native/juce_linux_Windowing.cpp

@@ -147,12 +147,12 @@ public:
 
     Point<float> localToGlobal (Point<float> relativePosition) override
     {
-        return relativePosition + getScreenPosition (false).toFloat();
+        return localToGlobal (*this, relativePosition);
     }
 
     Point<float> globalToLocal (Point<float> screenPosition) override
     {
-        return screenPosition - getScreenPosition (false).toFloat();
+        return globalToLocal (*this, screenPosition);
     }
 
     using ComponentPeer::localToGlobal;
@@ -231,8 +231,11 @@ public:
             if (! c->isVisible())
                 continue;
 
-            if (auto* peer = c->getPeer())
-                if (peer->contains (localPos + bounds.getPosition() - peer->getBounds().getPosition(), true))
+            auto* otherPeer = c->getPeer();
+            jassert (otherPeer == nullptr || dynamic_cast<LinuxComponentPeer*> (c->getPeer()) != nullptr);
+
+            if (auto* peer = static_cast<LinuxComponentPeer*> (otherPeer))
+                if (peer->contains (globalToLocal (*peer, localToGlobal (*this, localPos.toFloat())).roundToInt(), true))
                     return false;
         }
 
@@ -474,6 +477,19 @@ private:
         JUCE_DECLARE_NON_COPYABLE (LinuxRepaintManager)
     };
 
+    //==============================================================================
+    template <typename This>
+    static Point<float> localToGlobal (This& t, Point<float> relativePosition)
+    {
+        return relativePosition + t.getScreenPosition (false).toFloat();
+    }
+
+    template <typename This>
+    static Point<float> globalToLocal (This& t, Point<float> screenPosition)
+    {
+        return screenPosition - t.getScreenPosition (false).toFloat();
+    }
+
     //==============================================================================
     void settingChanged (const XWindowSystemUtilities::XSetting& settingThatHasChanged) override
     {