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/misc/juce_DropShadower.cpp

@@ -0,0 +1,223 @@
+/*
+  ==============================================================================
+
+   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
+{
+
+class DropShadower::ShadowWindow  : public Component
+{
+public:
+    ShadowWindow (Component* comp, const DropShadow& ds)
+        : target (comp), shadow (ds)
+    {
+        setVisible (true);
+        setInterceptsMouseClicks (false, false);
+
+        if (comp->isOnDesktop())
+        {
+            setSize (1, 1); // to keep the OS happy by not having zero-size windows
+            addToDesktop (ComponentPeer::windowIgnoresMouseClicks
+                            | ComponentPeer::windowIsTemporary
+                            | ComponentPeer::windowIgnoresKeyPresses);
+        }
+        else if (Component* const parent = comp->getParentComponent())
+        {
+            parent->addChildComponent (this);
+        }
+    }
+
+    void paint (Graphics& g) override
+    {
+        if (Component* c = target)
+            shadow.drawForRectangle (g, getLocalArea (c, c->getLocalBounds()));
+    }
+
+    void resized() override
+    {
+        repaint();  // (needed for correct repainting)
+    }
+
+    float getDesktopScaleFactor() const override
+    {
+        if (target != nullptr)
+            return target->getDesktopScaleFactor();
+
+        return Component::getDesktopScaleFactor();
+    }
+
+private:
+    WeakReference<Component> target;
+    DropShadow shadow;
+
+    JUCE_DECLARE_NON_COPYABLE (ShadowWindow)
+};
+
+
+//==============================================================================
+DropShadower::DropShadower (const DropShadow& ds)
+   : owner (nullptr), shadow (ds), reentrant (false)
+{
+}
+
+DropShadower::~DropShadower()
+{
+    if (owner != nullptr)
+    {
+        owner->removeComponentListener (this);
+        owner = nullptr;
+    }
+
+    updateParent();
+
+    reentrant = true;
+    shadowWindows.clear();
+}
+
+void DropShadower::setOwner (Component* componentToFollow)
+{
+    if (componentToFollow != owner)
+    {
+        if (owner != nullptr)
+            owner->removeComponentListener (this);
+
+        // (the component can't be null)
+        jassert (componentToFollow != nullptr);
+
+        owner = componentToFollow;
+        jassert (owner != nullptr);
+
+        updateParent();
+        owner->addComponentListener (this);
+
+        updateShadows();
+    }
+}
+
+void DropShadower::updateParent()
+{
+    if (Component* p = lastParentComp)
+        p->removeComponentListener (this);
+
+    lastParentComp = owner != nullptr ? owner->getParentComponent() : nullptr;
+
+    if (Component* p = lastParentComp)
+        p->addComponentListener (this);
+}
+
+void DropShadower::componentMovedOrResized (Component& c, bool /*wasMoved*/, bool /*wasResized*/)
+{
+    if (owner == &c)
+        updateShadows();
+}
+
+void DropShadower::componentBroughtToFront (Component& c)
+{
+    if (owner == &c)
+        updateShadows();
+}
+
+void DropShadower::componentChildrenChanged (Component&)
+{
+    updateShadows();
+}
+
+void DropShadower::componentParentHierarchyChanged (Component& c)
+{
+    if (owner == &c)
+    {
+        updateParent();
+        updateShadows();
+    }
+}
+
+void DropShadower::componentVisibilityChanged (Component& c)
+{
+    if (owner == &c)
+        updateShadows();
+}
+
+void DropShadower::updateShadows()
+{
+    if (reentrant)
+        return;
+
+    const ScopedValueSetter<bool> setter (reentrant, true, false);
+
+    if (owner == nullptr)
+    {
+        shadowWindows.clear();
+        return;
+    }
+
+    if (owner->isShowing()
+         && owner->getWidth() > 0 && owner->getHeight() > 0
+         && (Desktop::canUseSemiTransparentWindows() || owner->getParentComponent() != nullptr))
+    {
+        while (shadowWindows.size() < 4)
+            shadowWindows.add (new ShadowWindow (owner, shadow));
+
+        const int shadowEdge = jmax (shadow.offset.x, shadow.offset.y) + shadow.radius;
+        const int x = owner->getX();
+        const int y = owner->getY() - shadowEdge;
+        const int w = owner->getWidth();
+        const int h = owner->getHeight() + shadowEdge + shadowEdge;
+
+        for (int i = 4; --i >= 0;)
+        {
+            // there seem to be rare situations where the dropshadower may be deleted by
+            // callbacks during this loop, so use a weak ref to watch out for this..
+            WeakReference<Component> sw (shadowWindows[i]);
+
+            if (sw != nullptr)
+            {
+                sw->setAlwaysOnTop (owner->isAlwaysOnTop());
+
+                if (sw == nullptr)
+                    return;
+
+                switch (i)
+                {
+                    case 0: sw->setBounds (x - shadowEdge, y, shadowEdge, h); break;
+                    case 1: sw->setBounds (x + w, y, shadowEdge, h); break;
+                    case 2: sw->setBounds (x, y, w, shadowEdge); break;
+                    case 3: sw->setBounds (x, owner->getBottom(), w, shadowEdge); break;
+                    default: break;
+                }
+
+                if (sw == nullptr)
+                    return;
+
+                sw->toBehind (i == 3 ? owner : shadowWindows.getUnchecked (i + 1));
+            }
+        }
+    }
+    else
+    {
+        shadowWindows.clear();
+    }
+}
+
+} // namespace juce