fix macOS build (following Projucer changes made in Windows, which removed /Applications/JUCE/modules from its headers). move JUCE headers under source control, so that Windows and macOS can both build against same version of JUCE. remove AUv3 target (I think it's an iOS thing, so it will never work with this macOS fluidsynth dylib).

modules/juce_gui_basics/mouse/juce_ComponentDragger.cpp

@@ -0,0 +1,68 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2017 - ROLI Ltd.
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   By using JUCE, you agree to the terms of both the JUCE 5 End-User License
+   Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
+   27th April 2017).
+
+   End User License Agreement: www.juce.com/juce-5-licence
+   Privacy Policy: www.juce.com/juce-5-privacy-policy
+
+   Or: You may also use this code under the terms of the GPL v3 (see
+   www.gnu.org/licenses).
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+
+ComponentDragger::ComponentDragger() {}
+ComponentDragger::~ComponentDragger() {}
+
+//==============================================================================
+void ComponentDragger::startDraggingComponent (Component* const componentToDrag, const MouseEvent& e)
+{
+    jassert (componentToDrag != nullptr);
+    jassert (e.mods.isAnyMouseButtonDown()); // The event has to be a drag event!
+
+    if (componentToDrag != nullptr)
+        mouseDownWithinTarget = e.getEventRelativeTo (componentToDrag).getMouseDownPosition();
+}
+
+void ComponentDragger::dragComponent (Component* const componentToDrag, const MouseEvent& e,
+                                      ComponentBoundsConstrainer* const constrainer)
+{
+    jassert (componentToDrag != nullptr);
+    jassert (e.mods.isAnyMouseButtonDown()); // The event has to be a drag event!
+
+    if (componentToDrag != nullptr)
+    {
+        Rectangle<int> bounds (componentToDrag->getBounds());
+
+        // If the component is a window, multiple mouse events can get queued while it's in the same position,
+        // so their coordinates become wrong after the first one moves the window, so in that case, we'll use
+        // the current mouse position instead of the one that the event contains...
+        if (componentToDrag->isOnDesktop())
+            bounds += componentToDrag->getLocalPoint (nullptr, e.source.getScreenPosition()).roundToInt() - mouseDownWithinTarget;
+        else
+            bounds += e.getEventRelativeTo (componentToDrag).getPosition() - mouseDownWithinTarget;
+
+        if (constrainer != nullptr)
+            constrainer->setBoundsForComponent (componentToDrag, bounds, false, false, false, false);
+        else
+            componentToDrag->setBounds (bounds);
+    }
+}
+
+} // namespace juce