/*

    File:       OverlayCursor.c

    Contains:   Routines to handle drawing a pseudo large cursor.  By creating an overlay window 

                and positioning the overlay window under the cursor and drawing our large 

                cursor into the overlay window we simulate a large cursor.  Overlay windows

                are commonly used to simulate drawing directly to the screen.

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

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

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

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                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

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

*/

#ifdef __APPLE_CC__

#include <Carbon/Carbon.h>

#else

#include <Carbon.h>

#endif

#include    "Main.h"

static  void    CenterCursorWindowOnPoint( WindowRef window, Point *mouseLocation );

static  void    DrawCursorWindowContents ( Point* mouseLocation );

extern  GlobalsStruct   g;

//  CursorGrande additions

//  When the mouse moves, update the cursor window position and redraw the contents

pascal  OSStatus    LargeCursorEventHandler( EventHandlerCallRef myHandler, EventRef event, void* userData )

{

    #pragma unused ( myHandler )

    static  Point       mouseLocation;

    OSStatus            result          = eventNotHandledErr;

    UInt32              eventKind       = GetEventKind( event );

    WindowinfoStruct    *windowInfo;//      = (WindowRef) userData;

    if ( eventKind == kEventWindowBoundsChanging )

    {

        Rect        oRect, newRect;

        WindowRef   window;

        GetEventParameter( event, kEventParamDirectObject, typeWindowRef, NULL, sizeof(WindowRef), NULL, &window );

        windowInfo  = (WindowinfoStruct*) GetWRefCon( window );

        if ( (windowInfo==NULL) || ( (windowInfo->windowidentifier!=kMainTabWindowType) && (windowInfo->windowidentifier!=kThreadWindowType) ) )

            return( eventNotHandledErr );

        GetEventParameter( event, kEventParamPreviousBounds, typeQDRectangle, NULL, sizeof(Rect), NULL, &oRect );

        GetEventParameter( event, kEventParamCurrentBounds, typeQDRectangle, NULL, sizeof(Rect), NULL, &newRect );

        mouseLocation.h += newRect.left - oRect.left;

        mouseLocation.v += newRect.top - oRect.top;

    }

    else

    {

        //  Get the mouse location

        GetEventParameter( event, kEventParamMouseLocation, typeQDPoint, NULL, sizeof(mouseLocation), NULL, &mouseLocation );

    }

    CenterCursorWindowOnPoint( g.cursorWindow, &mouseLocation );

    DrawCursorWindowContents( &mouseLocation );

    return( result );

}

//  Given a point in global coordinates, center the cursor window over that location

static  void    CenterCursorWindowOnPoint( WindowRef window, Point *mouseLocation )

{

    Rect        bounds;

    Point       windowLocation;

    GetPortBounds( GetWindowPort(window), &bounds );

    windowLocation.h    = mouseLocation->h - (bounds.right - bounds.left) / 2;

    windowLocation.v    = mouseLocation->v - (bounds.bottom - bounds.top) / 2;

    //  We don't need to transform global<->local coords since MoveWindow takes global coords

    MoveWindow( window, windowLocation.h, windowLocation.v, 1 );

}

static  void    DrawCursorWindowContents( Point* mouseLocation )

{

    CGrafPtr        oPort;

    Rect            bounds;

    RGBColor        rgbRedColor     = { 0xFFFF, 0, 0 };

    RGBColor        rgbGreenColor   = { 0, 0xFFFF, 0 };

    RGBColor        rgbBlueColor    = { 0, 0, 0xFFFF };

    GetPort( &oPort );

    GetWindowPortBounds( g.cursorWindow, &bounds );

    SetPortWindowPort( g.cursorWindow );

    PenSize( 6, 6 );

    RGBForeColor( &rgbBlueColor);   FrameOval( &bounds );   InsetRect( &bounds, 9, 9 );

    RGBForeColor( &rgbRedColor);    FrameOval( &bounds );   InsetRect( &bounds, 9, 9 );

    RGBForeColor( &rgbGreenColor);  FrameOval( &bounds );

    SetPort( oPort );

}