build/macosx/platform_specific_code/juce_mac_CarbonViewWrapperComponent.h

@@ -0,0 +1,244 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library - "Jules' Utility Class Extensions"
+   Copyright 2004-7 by Raw Material Software ltd.
+
+  ------------------------------------------------------------------------------
+
+   JUCE can be redistributed and/or modified under the terms of the
+   GNU General Public License, as published by the Free Software Foundation;
+   either version 2 of the License, or (at your option) any later version.
+
+   JUCE is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with JUCE; if not, visit www.gnu.org/licenses or write to the
+   Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+   Boston, MA 02111-1307 USA
+
+  ------------------------------------------------------------------------------
+
+   If you'd like to release a closed-source product which uses JUCE, commercial
+   licenses are also available: visit www.rawmaterialsoftware.com/juce for
+   more information.
+
+  ==============================================================================
+*/
+
+/** Creates a floating carbon window that can be used to hold a carbon UI.
+
+    This is a handy class that's designed to be inlined where needed, e.g.
+    in the audio plugin hosting code.
+*/
+class CarbonViewWrapperComponent  : public Component,
+                                    public ComponentMovementWatcher,
+                                    public Timer
+{
+public:
+    CarbonViewWrapperComponent()
+        : ComponentMovementWatcher (this),
+          wrapperWindow (0),
+          embeddedView (0),
+          recursiveResize (false)
+    {
+    }
+
+    virtual ~CarbonViewWrapperComponent()
+    {
+        jassert (embeddedView == 0); // must call deleteWindow() in the subclass's destructor!
+    }
+
+    virtual HIViewRef attachView (WindowRef windowRef, HIViewRef rootView) = 0;
+    virtual void removeView (HIViewRef embeddedView) = 0;
+    virtual void mouseDown (int x, int y) {}
+    virtual void paint() {}
+
+    virtual bool getEmbeddedViewSize (int& w, int& h)
+    {
+        if (embeddedView == 0)
+            return false;
+
+        HIRect bounds;
+        HIViewGetBounds (embeddedView, &bounds);
+        w = jmax (1, roundFloatToInt (bounds.size.width));
+        h = jmax (1, roundFloatToInt (bounds.size.height));
+        return true;
+    }
+
+    void createWindow()
+    {
+        if (wrapperWindow == 0)
+        {
+            Rect r;
+            r.left = getScreenX();
+            r.top = getScreenY();
+            r.right = r.left + getWidth();
+            r.bottom = r.top + getHeight();
+
+            CreateNewWindow (kDocumentWindowClass,
+                             (WindowAttributes) (kWindowStandardHandlerAttribute | kWindowCompositingAttribute
+                                                  | kWindowNoShadowAttribute | kWindowNoTitleBarAttribute),
+                             &r, &wrapperWindow);
+
+            jassert (wrapperWindow != 0);
+            if (wrapperWindow == 0)
+                return;
+
+            NSWindow* carbonWindow = [[NSWindow alloc] initWithWindowRef: wrapperWindow];
+            NSWindow* ownerWindow = [((NSView*) getWindowHandle()) window];
+
+            [ownerWindow addChildWindow: carbonWindow
+                                ordered: NSWindowAbove];
+
+            embeddedView = attachView (wrapperWindow, HIViewGetRoot (wrapperWindow));
+
+            EventTypeSpec  windowEventTypes[] = { { kEventClassWindow, kEventWindowGetClickActivation },
+                                                  { kEventClassWindow, kEventWindowHandleDeactivate } };
+
+            EventHandlerUPP upp = NewEventHandlerUPP (carbonEventCallback);
+            InstallWindowEventHandler (wrapperWindow, upp,
+                                       sizeof (windowEventTypes) / sizeof (EventTypeSpec),
+                                       windowEventTypes, this, &eventHandlerRef);
+
+            setOurSizeToEmbeddedViewSize();
+            setEmbeddedWindowToOurSize();
+        }
+    }
+
+    void deleteWindow()
+    {
+        removeView (embeddedView);
+        embeddedView = 0;
+
+        if (wrapperWindow != 0)
+        {
+            RemoveEventHandler (eventHandlerRef);
+            DisposeWindow (wrapperWindow);
+            wrapperWindow = 0;
+        }
+    }
+
+    //==============================================================================
+    void setOurSizeToEmbeddedViewSize()
+    {
+        int w, h;
+        if (getEmbeddedViewSize (w, h))
+        {
+            if (w != getWidth() || h != getHeight())
+            {
+                startTimer (50);
+
+                setSize (w, h);
+                if (getParentComponent() != 0)
+                    getParentComponent()->setSize (w, h);
+            }
+            else
+            {
+                startTimer (jlimit (50, 500, getTimerInterval() + 20));
+            }
+        }
+        else
+        {
+            stopTimer();
+        }
+    }
+
+    void setEmbeddedWindowToOurSize()
+    {
+        if (! recursiveResize)
+        {
+            recursiveResize = true;
+
+            if (embeddedView != 0)
+            {
+                HIRect r;
+                r.origin.x = 0;
+                r.origin.y = 0;
+                r.size.width = (float) getWidth();
+                r.size.height = (float) getHeight();
+                HIViewSetFrame (embeddedView, &r);
+            }
+
+            if (wrapperWindow != 0)
+            {
+                Rect wr;
+                wr.left = getScreenX();
+                wr.top = getScreenY();
+                wr.right = wr.left + getWidth();
+                wr.bottom = wr.top + getHeight();
+
+                SetWindowBounds (wrapperWindow, kWindowContentRgn, &wr);
+                ShowWindow (wrapperWindow);
+            }
+
+            recursiveResize = false;
+        }
+    }
+
+    void componentMovedOrResized (bool /*wasMoved*/, bool /*wasResized*/)
+    {
+        setEmbeddedWindowToOurSize();
+    }
+
+    void componentPeerChanged()
+    {
+        deleteWindow();
+        createWindow();
+    }
+
+    void componentVisibilityChanged (Component&)
+    {
+        if (isShowing())
+            createWindow();
+        else
+            deleteWindow();
+
+        setEmbeddedWindowToOurSize();
+    }
+
+    void timerCallback()
+    {
+        setOurSizeToEmbeddedViewSize();
+    }
+
+    OSStatus carbonEventHandler (EventHandlerCallRef nextHandlerRef,
+                                 EventRef event)
+    {
+        switch (GetEventKind (event))
+        {
+            case kEventWindowHandleDeactivate:
+                ActivateWindow (wrapperWindow, TRUE);
+                break;
+
+            case kEventWindowGetClickActivation:
+            {
+                getTopLevelComponent()->toFront (false);
+
+                ClickActivationResult howToHandleClick = kActivateAndHandleClick;
+
+                SetEventParameter (event, kEventParamClickActivation, typeClickActivationResult,
+                                   sizeof (ClickActivationResult), &howToHandleClick);
+            }
+            break;
+        }
+
+        return noErr;
+    }
+
+    static pascal OSStatus carbonEventCallback (EventHandlerCallRef nextHandlerRef,
+                                                EventRef event, void* userData)
+    {
+        return ((CarbonViewWrapperComponent*) userData)->carbonEventHandler (nextHandlerRef, event);
+    }
+
+protected:
+    WindowRef wrapperWindow;
+    HIViewRef embeddedView;
+    bool recursiveResize;
+
+    EventHandlerRef eventHandlerRef;
+};