JUCE/src/juce_appframework/gui/components/special/juce_ActiveXControlComponent.h

/*
  ==============================================================================

   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.

  ==============================================================================
*/

#ifndef __JUCE_ACTIVEXCONTROLCOMPONENT_JUCEHEADER__
#define __JUCE_ACTIVEXCONTROLCOMPONENT_JUCEHEADER__

#include "../juce_Component.h"

#if JUCE_WIN32 || DOXYGEN

//==============================================================================
/**
    A Windows-specific class that can create and embed an ActiveX control inside
    itself.

    To use it, create one of these, put it in place and make sure it's visible in a
    window, then use createControl() to instantiate an ActiveX control. The control
    will then be moved and resized to follow the movements of this component.

    Of course, since the control is a heavyweight window, it'll obliterate any
    juce components that may overlap this component, but that's life.
*/
class JUCE_API  ActiveXControlComponent   : public Component
{
public:
    //==============================================================================
    /** Create an initially-empty container. */
    ActiveXControlComponent();

    /** Destructor. */
    ~ActiveXControlComponent();

    /** Tries to create an ActiveX control and embed it in this peer.

        The peer controlIID is a pointer to an IID structure - it's treated
        as a void* because when including the Juce headers, you might not always
        have included windows.h first, in which case IID wouldn't be defined.

        e.g. @code
        const IID myIID = __uuidof (QTControl);
        myControlComp->createControl (&myIID);
        @endcode
    */
    bool createControl (const void* controlIID);

    /** Deletes the ActiveX control, if one has been created.
    */
    void deleteControl();

    /** Returns true if a control is currently in use. */
    bool isControlOpen() const throw()                  { return control != 0; }

    /** Does a QueryInterface call on the embedded control object.

        This allows you to cast the control to whatever type of COM object you need.

        The iid parameter is a pointer to an IID structure - it's treated
        as a void* because when including the Juce headers, you might not always
        have included windows.h first, in which case IID wouldn't be defined, but
        you should just pass a pointer to an IID.

        e.g. @code
        const IID iid = __uuidof (IOleWindow);

        IOleWindow* oleWindow = (IOleWindow*) myControlComp->queryInterface (&iid);

        if (oleWindow != 0)
        {
            HWND hwnd;
            oleWindow->GetWindow (&hwnd);

            ...

            oleWindow->Release();
        }
        @endcode
    */
    void* queryInterface (const void* iid) const;

    /** Set this to false to stop mouse events being allowed through to the control.
    */
    void setMouseEventsAllowed (const bool eventsCanReachControl);

    /** Returns true if mouse events are allowed to get through to the control.
    */
    bool areMouseEventsAllowed() const throw()                  { return mouseEventsAllowed; }

    //==============================================================================
    /** @internal */
    void paint (Graphics& g);
    /** @internal */
    void* originalWndProc;

    juce_UseDebuggingNewOperator

private:
    friend class ActiveXControlData;
    void* control;
    bool mouseEventsAllowed;

    ActiveXControlComponent (const ActiveXControlComponent&);
    const ActiveXControlComponent& operator= (const ActiveXControlComponent&);

    void setControlBounds (const Rectangle& bounds) const;
    void setControlVisible (const bool b) const;
};

#endif

#endif   // __JUCE_ACTIVEXCONTROLCOMPONENT_JUCEHEADER__