/*

    File:       FloatingWindow.cp

    Contains:   Example of a floating window that docks.

    Version:    Mac OS X

    Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.

                ("Apple") in consideration of your agreement to the following terms, and your

                use, installation, modification or redistribution of this Apple software

                constitutes acceptance of these terms.  If you do not agree with these terms,

                please do not use, install, modify or redistribute this Apple software.

                In consideration of your agreement to abide by the following terms, and subject

                to these terms, Apple grants you a personal, non-exclusive license, under AppleÕs

                copyrights in this original Apple software (the "Apple Software"), to use,

                reproduce, modify and redistribute the Apple Software, with or without

                modifications, in source and/or binary forms; provided that if you redistribute

                the Apple Software in its entirety and without modifications, you must retain

                this notice and the following text and disclaimers in all such redistributions of

                the Apple Software.  Neither the name, trademarks, service marks or logos of

                Apple Computer, Inc. may be used to endorse or promote products derived from the

                Apple Software without specific prior written permission from Apple.  Except as

                expressly stated in this notice, no other rights or licenses, express or implied,

                are granted by Apple herein, including but not limited to any patent rights that

                may be infringed by your derivative works or by other works in which the Apple

                Software may be incorporated.

                The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO

                WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED

                WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR

                PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN

                COMBINATION WITH YOUR PRODUCTS.

                IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR

                CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE

                GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

                ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION

                OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT

                (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN

                ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    Copyright © 2000-2001 Apple Computer, Inc., All Rights Reserved

*/

#if !BUILDING_FOR_CARBON_8

    #include <Carbon/Carbon.h>

#else

    #include <Carbon.h>

#endif

#include "FloatingWindow.h"

enum

{

    kDockingDistance    = 20,

    kTitleBarFudge      = 15

};

#define abs( x )        ( (x) < 0 ? -(x) : (x) )

static const ControlID      kEditText1  = { 'FLOA', 1 };

static const ControlID      kEditText2  = { 'FLOA', 2 };

static const EventTypeSpec  kControlEventList[] =

{

    { kEventClassMouse, kEventMouseDown }

};

FloatingWindow::FloatingWindow()

    : TWindow( CFSTR( "AppearanceSample" ), CFSTR( "Floater" ) )

{

    ControlRef      control;

    EventTypeSpec   events[] = {    { kEventClassWindow, kEventWindowFocusRelinquish },

                                    { kEventClassWindow, kEventWindowBoundsChanging } };

    ::GetControlByID( GetWindowRef(), &kEditText1, &control );

    ::InstallControlEventHandler( control, GetControlHandler(), GetEventTypeCount( kControlEventList ),

            kControlEventList, this, NULL );

    ::GetControlByID( GetWindowRef(), &kEditText2, &control );

    ::InstallControlEventHandler( control, GetControlHandler(), GetEventTypeCount( kControlEventList ),

            kControlEventList, this, NULL );

    RegisterForEvents( GetEventTypeCount( events ), events );

    Show();

}

FloatingWindow::~FloatingWindow()

{

}

OSStatus

FloatingWindow::HandleEvent( EventHandlerCallRef inCallRef, EventRef inEvent )

{

    OSStatus    result = eventNotHandledErr;

    switch ( GetEventClass( inEvent ) )

    {

        case kEventClassWindow:

            switch ( GetEventKind( inEvent ) )

            {

                case kEventWindowFocusRelinquish:

                    ClearKeyboardFocus( GetWindowRef() );

                    result = noErr;

                    break;

                case kEventWindowBoundsChanging:

                    AdjustOriginForDocking( inEvent );

                    result = noErr;

                    break;

            }

            break;

    }

    return result;

}

pascal OSStatus

FloatingWindow::ControlHandler( EventHandlerCallRef inHandler, EventRef inEvent, void* userData )

{

    FloatingWindow* floater = (FloatingWindow*)userData;

    SetUserFocusWindow( floater->GetWindowRef() );

    return eventNotHandledErr;

}

EventHandlerUPP

FloatingWindow::GetControlHandler()

{

    static EventHandlerUPP  sHandler = NULL;

    if ( sHandler == NULL )

        sHandler = NewEventHandlerUPP( ControlHandler );

    return sHandler;

}

void

FloatingWindow::AdjustOriginForDocking( EventRef inEvent )

{

    WindowRef       window;

    Rect            bounds;

    Rect            displayRect;

    SInt16          height, width;

//  WindowRef       otherFloater;

    int             diff;

    UInt32          attributes = 0;

    OSStatus        err;

    err = GetEventParameter( inEvent, kEventParamDirectObject, typeWindowRef, NULL,

            sizeof( WindowRef ), NULL, &window );

    require_noerr( err, AdjustOriginForDocking_CantGetWindow );

    err = GetEventParameter( inEvent, kEventParamCurrentBounds, typeQDRectangle, NULL,

            sizeof( Rect ), NULL, &bounds );

    require_noerr( err, AdjustOriginForDocking_CantGetCurrentBounds );

    err = GetEventParameter( inEvent, kEventParamAttributes, typeUInt32,

            NULL, sizeof( UInt32 ), NULL, &attributes );

    // If we don't have any attributes, or we have them, but we aren't being called

    // due to DragWindow/ResizeWindow, then let's do nothing. This would happen if,

    // say, we were called from SetWindowBounds or the like (which doesn't actually

    // happen as I write this, but it will in time).

    if ( (err == noErr) &&

         (attributes & (kWindowBoundsChangeUserDrag | kWindowBoundsChangeUserResize) ) != 0 )

    {

        // Bounds is the proposed new rectangle for the window. Let's mess it up!

        displayRect = (**GetMainDevice()).gdRect;

        displayRect.top += GetMBarHeight();

        height = bounds.bottom - bounds.top;

        width = bounds.right - bounds.left;

        diff = abs( bounds.left - displayRect.left );

        if ( diff < kDockingDistance )

        {

            bounds.left = displayRect.left + 1;

            bounds.right = bounds.left + width;

        }

        diff = abs( bounds.right - displayRect.right );

        if ( diff < kDockingDistance )

        {

            bounds.right = displayRect.right - 1;

            if ( attributes & kWindowBoundsChangeUserDrag )

                bounds.left = bounds.right - width;

        }

        diff = abs( bounds.bottom - displayRect.bottom );

        if ( diff < kDockingDistance )

        {

            bounds.bottom = displayRect.bottom - 1;

            if ( attributes & kWindowBoundsChangeUserDrag )

                bounds.top = bounds.bottom - height;

        }

        diff = abs( bounds.top - (displayRect.top + kTitleBarFudge) );

        if ( diff < kDockingDistance )

        {

            bounds.top = displayRect.top + 1 + kTitleBarFudge;

            bounds.bottom = bounds.top + height;

        }

        SetEventParameter( inEvent, kEventParamCurrentBounds, typeQDRectangle, sizeof( Rect ), &bounds );

    }

AdjustOriginForDocking_CantGetCurrentBounds:

AdjustOriginForDocking_CantGetWindow:

    return;

}