show debug out when AU NSView doesnt get moved
[ardour.git] / gtk2_ardour / au_pluginui.mm
index 3682788a74619bd4ea2e5540f6bf53007b2cc86c..2115214d26e67ad36621d422749858f57c7c2dc6 100644 (file)
 #undef check // stupid gtk, stupid apple
 
 #include <gtkmm2ext/utils.h>
+#include <gtkmm2ext/window_proxy.h>
 
 #include "au_pluginui.h"
 #include "gui_thread.h"
+#include "processor_box.h"
 
-#include "appleutility/CAAudioUnit.h"
-#include "appleutility/CAComponent.h"
+#include "CAAudioUnit.h"
+#include "CAComponent.h"
 
 #import <AudioUnit/AUCocoaUIView.h>
 #import <CoreAudioKit/AUGenericView.h>
 #include "public_editor.h"
 #include "i18n.h"
 
+#ifdef COREAUDIO105
+#define ArdourCloseComponent CloseComponent
+#else
+#define ArdourCloseComponent AudioComponentInstanceDispose
+#endif
 using namespace ARDOUR;
 using namespace Gtk;
 using namespace Gtkmm2ext;
@@ -48,7 +55,7 @@ static const gchar* _automation_mode_strings[] = {
 };
 
 static void
-dump_view_tree (NSView* view, int depth)
+dump_view_tree (NSView* view, int depth, int maxdepth)
 {
        NSArray* subviews = [view subviews];
        unsigned long cnt = [subviews count];
@@ -56,14 +63,17 @@ dump_view_tree (NSView* view, int depth)
        for (int d = 0; d < depth; d++) {
                cerr << '\t';
        }
-        NSRect frame = [view frame];
+       NSRect frame = [view frame];
        cerr << " view @ " <<  frame.origin.x << ", " << frame.origin.y
-             << ' ' << frame.size.width << " x " << frame.size.height
-             << endl;
-       
+               << ' ' << frame.size.width << " x " << frame.size.height
+               << endl;
+
+       if (depth >= maxdepth) {
+               return;
+       }
        for (unsigned long i = 0; i < cnt; ++i) {
                NSView* subview = [subviews objectAtIndex:i];
-               dump_view_tree (subview, depth+1);
+               dump_view_tree (subview, depth+1, maxdepth);
        }
 }
 
@@ -74,27 +84,29 @@ dump_view_tree (NSView* view, int depth)
        self = [ super init ];
 
        if (self) {
-               plugin_ui = apluginui; 
+               plugin_ui = apluginui;
                top_level_parent = tlp;
-                
-                if (cp) {
-                        cocoa_parent = cp;
-                        
-                        [[NSNotificationCenter defaultCenter] addObserver:self
-                         selector:@selector(cocoaParentActivationHandler:)
-                         name:NSWindowDidBecomeMainNotification
-                         object:NULL];
-                        
-                        [[NSNotificationCenter defaultCenter] addObserver:self
-                         selector:@selector(cocoaParentBecameKeyHandler:)
-                         name:NSWindowDidBecomeKeyNotification
-                         object:NULL];
-                }
-        }
+
+               if (cp) {
+                       cocoa_parent = cp;
+
+                       [[NSNotificationCenter defaultCenter]
+                            addObserver:self
+                               selector:@selector(cocoaParentActivationHandler:)
+                                   name:NSWindowDidBecomeMainNotification
+                                 object:NULL];
+
+                       [[NSNotificationCenter defaultCenter]
+                            addObserver:self
+                               selector:@selector(cocoaParentBecameKeyHandler:)
+                                   name:NSWindowDidBecomeKeyNotification
+                                 object:NULL];
+               }
+       }
 
        return self;
 }
-               
+
 - (void)cocoaParentActivationHandler:(NSNotification *)notification
 {
        NSWindow* notification_window = (NSWindow *)[notification object];
@@ -105,7 +117,7 @@ dump_view_tree (NSView* view, int depth)
                } else {
                        plugin_ui->deactivate();
                }
-       } 
+       }
 }
 
 - (void)cocoaParentBecameKeyHandler:(NSNotification *)notification
@@ -118,27 +130,65 @@ dump_view_tree (NSView* view, int depth)
                } else {
                        plugin_ui->deactivate();
                }
-       } 
+       }
 }
 
 - (void)auViewResized:(NSNotification *)notification
 {
-        (void) notification; // stop complaints about unusued argument
+       (void) notification; // stop complaints about unusued argument
        plugin_ui->cocoa_view_resized();
 }
 
 @end
 
+@implementation LiveResizeNotificationObject
+
+- (LiveResizeNotificationObject*) initWithPluginUI: (AUPluginUI*) apluginui
+{
+       self = [ super init ];
+       if (self) {
+               plugin_ui = apluginui;
+       }
+
+       return self;
+}
+
+- (void)windowWillStartLiveResizeHandler:(NSNotification*)notification
+{
+       plugin_ui->start_live_resize ();
+}
+
+- (void)windowWillEndLiveResizeHandler:(NSNotification*)notification
+{
+       plugin_ui->end_live_resize ();
+}
+@end
+
 AUPluginUI::AUPluginUI (boost::shared_ptr<PluginInsert> insert)
        : PlugUIBase (insert)
        , automation_mode_label (_("Automation"))
        , preset_label (_("Presets"))
-       
+       , mapped (false)
+       , resizable (false)
+       , min_width (0)
+       , min_height (0)
+       , req_width (0)
+       , req_height (0)
+       , alo_width (0)
+       , alo_height (0)
+       , cocoa_window (0)
+       , au_view (0)
+       , in_live_resize (false)
+       , plugin_requested_resize (0)
+       , cocoa_parent (0)
+       , _notify (0)
+       , _resize_notify (0)
+
 {
        if (automation_mode_strings.empty()) {
                automation_mode_strings = I18N (_automation_mode_strings);
        }
-       
+
        set_popdown_strings (automation_mode_selector, automation_mode_strings);
        automation_mode_selector.set_active_text (automation_mode_strings.front());
 
@@ -185,7 +235,7 @@ AUPluginUI::AUPluginUI (boost::shared_ptr<PluginInsert> insert)
 
        set_spacing (6);
        pack_start (top_box, false, false);
-       pack_start (low_box, false, false);
+       pack_start (low_box, true, true);
 
        preset_label.show ();
        _preset_combo.show ();
@@ -218,22 +268,33 @@ AUPluginUI::AUPluginUI (boost::shared_ptr<PluginInsert> insert)
                create_cocoa_view ();
        }
 
-       low_box.add_events(Gdk::VISIBILITY_NOTIFY_MASK);
+       low_box.add_events (Gdk::VISIBILITY_NOTIFY_MASK | Gdk::EXPOSURE_MASK);
 
        low_box.signal_realize().connect (mem_fun (this, &AUPluginUI::lower_box_realized));
        low_box.signal_visibility_notify_event ().connect (mem_fun (this, &AUPluginUI::lower_box_visibility_notify));
+       if (au_view) {
+               low_box.signal_size_request ().connect (mem_fun (this, &AUPluginUI::lower_box_size_request));
+               low_box.signal_size_allocate ().connect (mem_fun (this, &AUPluginUI::lower_box_size_allocate));
+               low_box.signal_map ().connect (mem_fun (this, &AUPluginUI::lower_box_map));
+               low_box.signal_unmap ().connect (mem_fun (this, &AUPluginUI::lower_box_unmap));
+               low_box.signal_expose_event ().connect (mem_fun (this, &AUPluginUI::lower_box_expose));
+       }
 }
 
 AUPluginUI::~AUPluginUI ()
 {
-        if (_notify) {
-                [[NSNotificationCenter defaultCenter] removeObserver:_notify];
-        }
+       if (_notify) {
+               [[NSNotificationCenter defaultCenter] removeObserver:_notify];
+       }
+
+       if (_resize_notify) {
+               [[NSNotificationCenter defaultCenter] removeObserver:_resize_notify];
+       }
 
        if (cocoa_parent) {
                NSWindow* win = get_nswindow();
                [win removeChildWindow:cocoa_parent];
-       } 
+       }
 
 #ifdef WITH_CARBON
        if (carbon_window) {
@@ -243,13 +304,13 @@ AUPluginUI::~AUPluginUI ()
 #endif
 
        if (editView) {
-               CloseComponent (editView);
+               ArdourCloseComponent (editView);
        }
 
        if (au_view) {
                /* remove whatever we packed into low_box so that GTK doesn't
                   mess with it.
-               */
+                */
 
                [au_view removeFromSuperview];
        }
@@ -260,13 +321,13 @@ AUPluginUI::test_carbon_view_support ()
 {
 #ifdef WITH_CARBON
        bool ret = false;
-       
+
        carbon_descriptor.componentType = kAudioUnitCarbonViewComponentType;
        carbon_descriptor.componentSubType = 'gnrc';
        carbon_descriptor.componentManufacturer = 'appl';
        carbon_descriptor.componentFlags = 0;
        carbon_descriptor.componentFlagsMask = 0;
-       
+
        OSStatus err;
 
        // ask the AU for its first editor component
@@ -286,10 +347,10 @@ AUPluginUI::test_carbon_view_support ()
 
        return ret;
 #else
-        return false;
+       return false;
 #endif
 }
-       
+
 bool
 AUPluginUI::test_cocoa_view_support ()
 {
@@ -298,7 +359,7 @@ AUPluginUI::test_cocoa_view_support ()
        OSStatus err = AudioUnitGetPropertyInfo(*au->get_au(),
                                                kAudioUnitProperty_CocoaUI, kAudioUnitScope_Global,
                                                0, &dataSize, &isWritable);
-       
+
        return dataSize > 0 && err == noErr;
 }
 
@@ -327,7 +388,7 @@ AUPluginUI::create_cocoa_view ()
 
        OSStatus result = AudioUnitGetPropertyInfo (*au->get_au(),
                                                    kAudioUnitProperty_CocoaUI,
-                                                   kAudioUnitScope_Global, 
+                                                   kAudioUnitScope_Global,
                                                    0,
                                                    &dataSize,
                                                    &isWritable );
@@ -335,7 +396,7 @@ AUPluginUI::create_cocoa_view ()
        numberOfClasses = (dataSize - sizeof(CFURLRef)) / sizeof(CFStringRef);
 
        // Does view have custom Cocoa UI?
-       
+
        if ((result == noErr) && (numberOfClasses > 0) ) {
 
                DEBUG_TRACE(DEBUG::AudioUnits,
@@ -351,13 +412,13 @@ AUPluginUI::create_cocoa_view ()
                                        &dataSize) == noErr) {
 
                        CocoaViewBundlePath     = (NSURL *)cocoaViewInfo->mCocoaAUViewBundleLocation;
-                               
+
                        // we only take the first view in this example.
                        factoryClassName        = (NSString *)cocoaViewInfo->mCocoaAUViewClass[0];
-                       
+
                        DEBUG_TRACE (DEBUG::AudioUnits, string_compose ("the factory name is %1 bundle is %2\n",
                                                                        [factoryClassName UTF8String], CocoaViewBundlePath));
-                        
+
                } else {
 
                        DEBUG_TRACE (DEBUG::AudioUnits, string_compose ("No cocoaUI property cocoaViewInfo = %1\n", cocoaViewInfo));
@@ -372,7 +433,7 @@ AUPluginUI::create_cocoa_view ()
        // [A] Show custom UI if view has it
 
        if (CocoaViewBundlePath && factoryClassName) {
-               NSBundle *viewBundle    = [NSBundle bundleWithPath:[CocoaViewBundlePath path]];
+               NSBundle *viewBundle    = [NSBundle bundleWithPath:[CocoaViewBundlePath path]];
 
                DEBUG_TRACE (DEBUG::AudioUnits, string_compose ("tried to create bundle, result = %1\n", viewBundle));
 
@@ -386,7 +447,7 @@ AUPluginUI::create_cocoa_view ()
                                error << _("AUPluginUI: error getting AU view's factory class from bundle") << endmsg;
                                return -1;
                        }
-                       
+
                        // make sure 'factoryClass' implements the AUCocoaUIBase protocol
                        if (!plugin_class_valid (factoryClass)) {
                                error << _("AUPluginUI: U view's factory class does not properly implement the AUCocoaUIBase protocol") << endmsg;
@@ -405,14 +466,14 @@ AUPluginUI::create_cocoa_view ()
                        au_view = [factory uiViewForAudioUnit:*au->get_au() withSize:NSZeroSize];
 
                        DEBUG_TRACE (DEBUG::AudioUnits, string_compose ("view created @ %1\n", au_view));
-                       
+
                        // cleanup
                        [CocoaViewBundlePath release];
                        if (cocoaViewInfo) {
                                UInt32 i;
                                for (i = 0; i < numberOfClasses; i++)
                                        CFRelease(cocoaViewInfo->mCocoaAUViewClass[i]);
-                               
+
                                free (cocoaViewInfo);
                        }
                        wasAbleToLoadCustomView = true;
@@ -428,62 +489,153 @@ AUPluginUI::create_cocoa_view ()
                [(AUGenericView *)au_view setShowsExpertParameters:1];
        }
 
-       // Get the initial size of the new AU View's frame 
-       
-       NSRect rect = [au_view frame];
-        prefheight = rect.size.height;
-        prefwidth = rect.size.width;
-       low_box.set_size_request (rect.size.width, rect.size.height);
+       // Get the initial size of the new AU View's frame
+       NSRect  frame = [au_view frame];
+       min_width  = req_width  = frame.size.width;
+       min_height = req_height = frame.size.height;
+
+       resizable  = [au_view autoresizingMask];
+       std::cerr << plugin->name() << " initial frame = " << [NSStringFromRect (frame) UTF8String] << " resizable ? " << resizable << std::endl;
+
+       low_box.queue_resize ();
 
        return 0;
 }
 
+void
+AUPluginUI::update_view_size ()
+{
+       last_au_frame = [au_view frame];
+}
+
 void
 AUPluginUI::cocoa_view_resized ()
 {
+        /* we can get here for two reasons:
+
+           1) the plugin window was resized by the user, a new size was
+           allocated to the window, ::update_view_size() was called, and we
+           explicitly/manually resized the AU NSView.
+
+           2) the plugin decided to resize itself (probably in response to user
+           action, but not in response to an actual window resize)
+
+           We only want to proceed with a window resizing in the second case.
+        */
+
+       if (in_live_resize) {
+               /* ::update_view_size() will be called at the right times and
+                * will update the view size. We don't need to anything while a
+                * live resize in underway.
+                */
+               return;
+       }
+
+       if (plugin_requested_resize) {
+               /* we tried to change the plugin frame from inside this method
+                * (to adjust the origin), and the plugin changed its size
+                * again. Ignore this second call.
+                */
+               std::cerr << plugin->name() << " re-entrant call to cocoa_view_resized, ignored\n";
+               return;
+       }
+
+       plugin_requested_resize = 1;
+
+       ProcessorWindowProxy* wp = insert->window_proxy();
+       if (wp) {
+               /* Once a plugin has requested a resize of its own window, do
+                * NOT save the window. The user may save state with the plugin
+                * editor expanded to show "extra detail" - the plugin will not
+                * refill this space when the editor is first
+                * instantiated. Leaving the window in the "too big" state
+                * cannot be recovered from.
+                *
+                * The window will be sized to fit the plugin's own request. Done.
+                */
+               wp->set_state_mask (WindowProxy::Position);
+       }
+
+        NSRect new_frame = [au_view frame];
+
+       std::cerr << "Plugin " << plugin->name() << " requested update (prs now = " << plugin_requested_resize << ")\n";
+       std::cerr << "\tAU NSView frame : " << [ NSStringFromRect (new_frame) UTF8String] << std::endl;
+       std::cerr << "\tlast au frame : " << [ NSStringFromRect (last_au_frame) UTF8String] << std::endl;
+
+       /* from here on, we know that we've been called because the plugin
+        * decided to change the NSView frame itself.
+        */
+
+       /* step one: compute the change in the frame size.
+        */
+
+       float dy = new_frame.size.height - last_au_frame.size.height;
+        float dx = new_frame.size.width - last_au_frame.size.width;
+
         NSWindow* window = get_nswindow ();
         NSRect windowFrame= [window frame];
-        NSRect new_frame = [au_view frame];
 
-        float dy = last_au_frame.size.height - new_frame.size.height;
-        float dx = last_au_frame.size.width - new_frame.size.width;
+       /* we want the top edge of the window to remain in the same place,
+          but the Cocoa/Quartz origin is at the lower left. So, when we make
+          the window larger, we will move it down, which means shifting the
+          origin toward (x,0). This will leave the top edge in the same place.
+       */
+
+        windowFrame.origin.y    -= dy;
+        windowFrame.origin.x    -= dx;
+        windowFrame.size.height += dy;
+        windowFrame.size.width  += dx;
 
-        windowFrame.origin.y    += dy;
-        windowFrame.origin.x    += dx;
-        windowFrame.size.height -= dy;
-        windowFrame.size.width  -= dx;
-        
-        [[NSNotificationCenter defaultCenter] removeObserver:_notify
-         name:NSViewFrameDidChangeNotification 
-         object:au_view];
+       std::cerr << "\tChange size by " << dx << " x " << dy << std::endl;
 
         NSUInteger old_auto_resize = [au_view autoresizingMask];
 
+       /* Stop the AU NSView from resizing itself *again* in response to
+          us changing the window size.
+       */
+
+
         [au_view setAutoresizingMask:NSViewNotSizable];
-        [window setFrame:windowFrame display:1];
 
-        /* Some stupid AU Views change the origin of the original AU View
-           when they are resized (I'm looking at you AUSampler). If the origin
-           has been moved, move it back.
+       /* this resizes the window. it will eventually trigger a new
+        * size_allocate event/callback, and we'll end up in
+        * ::update_view_size(). We want to stop that from doing anything,
+        * because we've already resized the window to fit the new new view,
+        * so there's no need to actually update the view size again.
+        */
+
+       [window setFrame:windowFrame display:1];
+
+        /* Some stupid AU Views change the origin of the original AU View when
+           they are resized (I'm looking at you AUSampler). If the origin has
+           been moved, move it back.
         */
 
         if (last_au_frame.origin.x != new_frame.origin.x ||
             last_au_frame.origin.y != new_frame.origin.y) {
                 new_frame.origin = last_au_frame.origin;
+               std::cerr << "Move AU NSView origin back to "
+                         << new_frame.origin.x << ", " << new_frame.origin.y
+                         << std::endl;
                 [au_view setFrame:new_frame];
                 /* also be sure to redraw the topbox because this can
                    also go wrong.
                  */
                 top_box.queue_draw ();
-        }
+        } else {
+               std::cerr << "No need to move origin, last au origin " << [NSStringFromPoint(last_au_frame.origin) UTF8String]
+                         << " == new au origin " << [NSStringFromPoint(new_frame.origin) UTF8String]
+                         << std::endl;
+       }
 
         [au_view setAutoresizingMask:old_auto_resize];
 
-        [[NSNotificationCenter defaultCenter] addObserver:_notify
-         selector:@selector(auViewResized:) name:NSViewFrameDidChangeNotification
-         object:au_view];
+       /* keep a copy of the size of the AU NSView. We didn't set - the plugin did */
+       last_au_frame = new_frame;
+       min_width  = req_width  = new_frame.size.width;
+       min_height = req_height = new_frame.size.height;
 
-        last_au_frame = new_frame;
+       plugin_requested_resize = 0;
 }
 
 int
@@ -494,13 +646,13 @@ AUPluginUI::create_carbon_view ()
        ControlRef root_control;
 
        Component editComponent = FindNextComponent(NULL, &carbon_descriptor);
-       
+
        OpenAComponent(editComponent, &editView);
        if (!editView) {
                error << _("AU Carbon view: cannot open AU Component") << endmsg;
                return -1;
        }
-       
+
        Rect r = { 100, 100, 100, 100 };
        WindowAttributes attr = WindowAttributes (kWindowStandardHandlerAttribute |
                                                  kWindowCompositingAttribute|
@@ -509,14 +661,14 @@ AUPluginUI::create_carbon_view ()
 
        if ((err = CreateNewWindow(kUtilityWindowClass, attr, &r, &carbon_window)) != noErr) {
                error << string_compose (_("AUPluginUI: cannot create carbon window (err: %1)"), err) << endmsg;
-               CloseComponent (editView);
+               ArdourCloseComponent (editView);
                return -1;
        }
-       
+
        if ((err = GetRootControl(carbon_window, &root_control)) != noErr) {
                error << string_compose (_("AUPlugin: cannot get root control of carbon window (err: %1)"), err) << endmsg;
                DisposeWindow (carbon_window);
-               CloseComponent (editView);
+               ArdourCloseComponent (editView);
                return -1;
        }
 
@@ -527,7 +679,7 @@ AUPluginUI::create_carbon_view ()
        if ((err = AudioUnitCarbonViewCreate (editView, *au->get_au(), carbon_window, root_control, &location, &size, &viewPane)) != noErr) {
                error << string_compose (_("AUPluginUI: cannot create carbon plugin view (err: %1)"), err) << endmsg;
                DisposeWindow (carbon_window);
-               CloseComponent (editView);
+               ArdourCloseComponent (editView);
                return -1;
        }
 
@@ -538,11 +690,11 @@ AUPluginUI::create_carbon_view ()
        size.x = bounds.right-bounds.left;
        size.y = bounds.bottom-bounds.top;
 
-       prefwidth = (int) (size.x + 0.5);
-       prefheight = (int) (size.y + 0.5);
+       req_width = (int) (size.x + 0.5);
+       req_height = (int) (size.y + 0.5);
 
-       SizeWindow (carbon_window, prefwidth, prefheight,  true);
-       low_box.set_size_request (prefwidth, prefheight);
+       SizeWindow (carbon_window, req_width, req_height,  true);
+       low_box.set_size_request (req_width, req_height);
 
        return 0;
 #else
@@ -598,13 +750,6 @@ AUPluginUI::parent_carbon_window ()
                return -1;
        }
 
-       Gtk::Container* toplevel = get_toplevel();
-
-       if (!toplevel || !toplevel->is_toplevel()) {
-               error << _("AUPluginUI: no top level window!") << endmsg;
-               return -1;
-       }
-       
        /* figure out where the cocoa parent window is in carbon-coordinate space, which
           differs from both cocoa-coordinate space and GTK-coordinate space
        */
@@ -623,9 +768,9 @@ AUPluginUI::parent_carbon_window ()
        int packing_extra = 6; // this is the total vertical packing in our top level window
 
        /* move into position, based on parent window position */
-       MoveWindow (carbon_window, 
-                   windowStructureBoundsRect.left, 
-                   windowStructureBoundsRect.top + titlebar_height + top_box.get_height() + packing_extra, 
+       MoveWindow (carbon_window,
+                   windowStructureBoundsRect.left,
+                   windowStructureBoundsRect.top + titlebar_height + top_box.get_height() + packing_extra,
                    false);
        ShowWindow (carbon_window);
 
@@ -634,7 +779,7 @@ AUPluginUI::parent_carbon_window ()
 
        SetWindowActivationScope (carbon_window, kWindowActivationScopeNone);
 
-       _notify = [ [NotificationObject alloc] initWithPluginUI:this andCocoaParent:cocoa_parent andTopLevelParent:win ]; 
+       _notify = [ [NotificationObject alloc] initWithPluginUI:this andCocoaParent:cocoa_parent andTopLevelParent:win ];
 
        [win addChildWindow:cocoa_parent ordered:NSWindowAbove];
        [win setAutodisplay:1]; // turn of GTK stuff for this window
@@ -643,7 +788,7 @@ AUPluginUI::parent_carbon_window ()
 #else
        return -1;
 #endif
-}      
+}
 
 int
 AUPluginUI::parent_cocoa_window ()
@@ -654,37 +799,42 @@ AUPluginUI::parent_cocoa_window ()
                return -1;
        }
 
-       [win setAutodisplay:1]; // turn of GTK stuff for this window
+       //[win setAutodisplay:1]; // turn off GTK stuff for this window
 
-       Gtk::Container* toplevel = get_toplevel();
-
-       if (!toplevel || !toplevel->is_toplevel()) {
-               error << _("AUPluginUI: no top level window!") << endmsg;
-               return -1;
-       }
+       NSView* view = gdk_quartz_window_get_nsview (low_box.get_window()->gobj());
+       [view addSubview:au_view];
 
-       NSView* view = gdk_quartz_window_get_nsview (get_toplevel()->get_window()->gobj());
-       GtkRequisition a = top_box.size_request ();
-
-       /* move the au_view down so that it doesn't overlap the top_box contents */
+       /* this moves the AU NSView down and over to provide a left-hand margin
+        * and to clear the Ardour "task bar" (with plugin preset mgmt buttons,
+        * keyboard focus control, bypass etc).
+        */
 
-       const int spacing = 6;  // main vbox spacing
-       const int pad     = 4;  // box pad
+       gint xx, yy;
+       gtk_widget_translate_coordinates(
+                       GTK_WIDGET(low_box.gobj()),
+                       GTK_WIDGET(low_box.get_parent()->gobj()),
+                       8, 6, &xx, &yy);
+       [au_view setFrame:NSMakeRect(xx, yy, req_width, req_height)];
 
-       NSPoint origin = { spacing + pad, static_cast<CGFloat> (a.height) + (2 * spacing) + pad };
+       last_au_frame = [au_view frame];
+       // watch for size changes of the view
+       _notify = [ [NotificationObject alloc] initWithPluginUI:this andCocoaParent:NULL andTopLevelParent:win ];
 
-       [au_view setFrameOrigin:origin];
-        [view addSubview:au_view positioned:NSWindowBelow relativeTo:NULL];
+       [[NSNotificationCenter defaultCenter] addObserver:_notify
+               selector:@selector(auViewResized:) name:NSViewFrameDidChangeNotification
+               object:au_view];
 
-        last_au_frame = [au_view frame];
+       // catch notifications that live resizing is about to start
 
-       // watch for size changes of the view
+       _resize_notify = [ [ LiveResizeNotificationObject alloc] initWithPluginUI:this ];
 
-       _notify = [ [NotificationObject alloc] initWithPluginUI:this andCocoaParent:NULL andTopLevelParent:win ];
+       [[NSNotificationCenter defaultCenter] addObserver:_resize_notify
+               selector:@selector(windowWillStartLiveResizeHandler:) name:NSWindowWillStartLiveResizeNotification
+               object:win];
 
-        [[NSNotificationCenter defaultCenter] addObserver:_notify
-         selector:@selector(auViewResized:) name:NSViewFrameDidChangeNotification
-         object:au_view];
+       [[NSNotificationCenter defaultCenter] addObserver:_resize_notify
+               selector:@selector(windowWillEndLiveResizeHandler:) name:NSWindowDidEndLiveResizeNotification
+               object:win];
 
        return 0;
 }
@@ -754,6 +904,57 @@ AUPluginUI::lower_box_visibility_notify (GdkEventVisibility* ev)
        return false;
 }
 
+void
+AUPluginUI::lower_box_map ()
+{
+       mapped = true;
+       [au_view setHidden:0];
+       update_view_size ();
+}
+
+void
+AUPluginUI::lower_box_unmap ()
+{
+       mapped = false;
+       [au_view setHidden:1];
+}
+
+void
+AUPluginUI::lower_box_size_request (GtkRequisition* requisition)
+{
+       requisition->width  = req_width;
+       requisition->height = req_height;
+}
+
+void
+AUPluginUI::lower_box_size_allocate (Gtk::Allocation& allocation)
+{
+       alo_width  = allocation.get_width ();
+       alo_height = allocation.get_height ();
+       std::cerr << "lower box size reallocated to " << alo_width << " x " << alo_height << std::endl;
+       update_view_size ();
+       std::cerr << "low box draw (0, 0, " << alo_width << " x " << alo_height << ")\n";
+       low_box.queue_draw_area (0, 0, alo_width, alo_height);
+}
+
+gboolean
+AUPluginUI::lower_box_expose (GdkEventExpose* event)
+{
+       std::cerr << "lower box expose: " << event->area.x << ", " << event->area.y
+                 << ' '
+                 << event->area.width << " x " << event->area.height
+                 << " ALLOC "
+                 << get_allocation().get_width() << " x " << get_allocation().get_height()
+                 << std::endl;
+
+       /* hack to keep ardour responsive
+        * some UIs (e.g Addictive Drums) completely hog the CPU
+        */
+       ARDOUR::GUIIdle();
+
+       return true;
+}
+
 void
 AUPluginUI::on_window_hide ()
 {
@@ -764,12 +965,12 @@ AUPluginUI::on_window_hide ()
        }
 #endif
        hide_all ();
-        
+
 #if 0
-        NSArray* wins = [NSApp windows];
-        for (uint32_t i = 0; i < [wins count]; i++) {
-                id win = [wins objectAtIndex:i];
-        }
+       NSArray* wins = [NSApp windows];
+       for (uint32_t i = 0; i < [wins count]; i++) {
+               id win = [wins objectAtIndex:i];
+       }
 #endif
 }
 
@@ -812,4 +1013,16 @@ create_au_gui (boost::shared_ptr<PluginInsert> plugin_insert, VBox** box)
        return aup;
 }
 
+void
+AUPluginUI::start_live_resize ()
+{
+  std::cerr << "\n\n\n++++ Entering Live Resize\n";
+  in_live_resize = true;
+}
 
+void
+AUPluginUI::end_live_resize ()
+{
+  std::cerr << "\n\n\n ----Leaving Live Resize\n";
+  in_live_resize = false;
+}