Added Component::findChildWithID

modules/juce_gui_basics/components/juce_Component.cpp

@@ -1440,6 +1440,18 @@ int Component::getIndexOfChildComponent (const Component* const child) const noe
     return childComponentList.indexOf (const_cast <Component*> (child));
 }
 
+Component* Component::findChildWithID (const String& targetID) const noexcept
+{
+    for (int i = childComponentList.size(); --i >= 0;)
+    {
+        Component* const c = childComponentList.getUnchecked(i);
+        if (c->componentID == targetID)
+            return c;
+    }
+
+    return nullptr;
+}
+
 Component* Component::getTopLevelComponent() const noexcept
 {
     const Component* comp = this;

modules/juce_gui_basics/components/juce_Component.h

@@ -101,13 +101,13 @@ public:
     virtual void setName (const String& newName);
 
     /** Returns the ID string that was set by setComponentID().
-        @see setComponentID
+        @see setComponentID, findChildWithID
     */
     const String& getComponentID() const noexcept           { return componentID; }
 
     /** Sets the component's ID string.
         You can retrieve the ID using getComponentID().
-        @see getComponentID
+        @see getComponentID, findChildWithID
     */
     void setComponentID (const String& newID);
 
@@ -699,6 +699,11 @@ public:
     */
     int getIndexOfChildComponent (const Component* child) const noexcept;
 
+    /** Looks for a child component with the specified ID.
+        @see setComponentID, getComponentID
+    */
+    Component* findChildWithID (const String& componentID) const noexcept;
+
     /** Adds a child component to this one.
 
         Adding a child component does not mean that the component will own or delete the child - it's

modules/juce_gui_basics/positioning/juce_RelativeCoordinatePositioner.cpp

@@ -80,15 +80,7 @@ Component* RelativeCoordinatePositionerBase::ComponentScope::findSiblingComponen
     Component* const parent = component.getParentComponent();
 
     if (parent != nullptr)
-    {
-        for (int i = parent->getNumChildComponents(); --i >= 0;)
-        {
-            Component* const c = parent->getChildComponent(i);
-
-            if (c->getComponentID() == componentID)
-                return c;
-        }
-    }
+        return parent->findChildWithID (componentID);
 
     return nullptr;
 }