/*

    File:       MyDeviceLoop.c

    Contains:   This snippet shows how to write a device loop that          

                works under System 7 and pre-7.0 systems.  As               

                described on pages 21-23 and 21-24 of Inside Mac            

                volume VI, a device loop procedure searches all             

                active screen devices, calling a drawing procedure          

                whenever it encounters a screen that intersects         

                the drawing region.  In this app the drawing                

                region is the app's window bounds and the chosen            

                drawing procedure simply displays the screen's              

                colors for every device the window bounds intersect.        

    Written by: EL  

    Copyright:  Copyright © 1992-1999 by Apple Computer, Inc., All Rights Reserved.

    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.

    Change History (most recent first):

        6/2003      MK              Updated for ProjectBuilder

        08/2000     JM              Carbonized, non-Carbon code is commented out

                                                        for demonstration purposes.

        7/12/1999   KG              Updated for Metrowerks Codewarror Pro 2.1

*/

#include "CarbonPrefix.h"

/* Constant Declarations */

#define WWIDTH      400

#define WHEIGHT     256

//#define WLEFT     (((qd.screenBits.bounds.right - qd.screenBits.bounds.left) - WWIDTH) / 2)

//#define WTOP      (((qd.screenBits.bounds.bottom - qd.screenBits.bounds.top) - WHEIGHT) / 2)

enum PointSelector {topLeft,

            botRight};

/* Global Variable Definitions */

WindowPtr   gWindow;

void initMac();

void createWindow();

void doMyDeviceLoop();

void doDraw();

void doEventLoop();

int main()

{

    initMac();

    createWindow();

    doEventLoop();

        return 0;

}

void initMac()

{

    /*MaxApplZone();

    InitGraf( &qd.thePort );

    InitFonts();

    InitWindows();

    InitMenus();

    TEInit();

    InitDialogs( nil );*/

    InitCursor();

    FlushEvents( 0, everyEvent );

}

void createWindow()

{

    Rect rect;

    BitMap  bitMap;

    int top, left;

    GetQDGlobalsScreenBits(&bitMap);

    top = (((bitMap.bounds.bottom - bitMap.bounds.top) - WHEIGHT) / 2);

    left = (((bitMap.bounds.right - bitMap.bounds.left) - WWIDTH) / 2);

    //SetRect( &rect, WLEFT, WTOP, WLEFT + WWIDTH, WTOP + WHEIGHT );

    SetRect( &rect, left, top, left + WWIDTH, top + WHEIGHT );

    gWindow = NewCWindow( 0L, &rect, "\pMyDeviceLoop", true, documentProc,

                            (WindowPtr)-1L, true, 0L );                     

    //SetPort( gWindow );

    SetPortWindowPort( gWindow );

    TextFont( kFontIDTimes );

    TextSize( 48 );

    TextMode( srcCopy );

}

// Old version of doMyDeviceLoop, new version capable of supporting multiple monitors

/*

void doMyDeviceLoop()

{

    int         depth;

    Rect        gDeviceRect;

    Rect        intersectingRect;

    GDHandle    gDevice;

    //Point     point;

    Rect        tempRect1;

    // Get the handle to the first device in the list. 

    gDevice = GetDeviceList();

    // Loop through all the devices in the list. 

    while (gDevice != nil)

    {

        // Get the device's gdRect and convert it to local coordinates. 

        gDeviceRect = (**gDevice).gdRect;

        depth = (**(**gDevice).gdPMap).pixelSize;

        GlobalToLocal( topLeft );

        GlobalToLocal( (Point *)botRight );

        // Check if the app's window rect intersects the device's, and if it 

        //  does, set the clip region's rect to the intersection, then DRAW! 

        //if (SectRect( &gWindow->portRect, &gDeviceRect, &intersectingRect ))

        if (SectRect( GetPortBounds(GetWindowPort(gWindow), &tempRect1), &gDeviceRect, &intersectingRect ))

        {

            ClipRect( &intersectingRect );

            doDraw( depth, &intersectingRect );

        }

        // Get the next device in the list. 

        gDevice = GetNextDevice( gDevice );

    }

}

*/

// New doMyDeviceLoop, now works with multiple monitors

void doMyDeviceLoop()

{

    int             depth;

    Rect            gDeviceRect;

    Rect            intersectingRect;

    GDHandle        gDevice;

    //WindowRecord  *windowRec = (WindowRecord *)gWindow;

    WindowPtr       windowRec = gWindow;

    Rect            windowRect; //= (**windowRec->contRgn).rgnBBox;

    RgnHandle       rgnHandle = NewRgn();

    GetWindowRegion(windowRec, kWindowContentRgn, rgnHandle);

    GetRegionBounds(rgnHandle, &windowRect);

    // Get the handle to the first device in the list. 

    gDevice = GetDeviceList();

    // Loop through all the devices in the list. 

    while (gDevice != nil)

    {

        // Get the device's gdRect  */

        gDeviceRect = (**gDevice).gdRect;

        depth = (**(**gDevice).gdPMap).pixelSize;

        // Check if the app's window rect intersects the device's, and if it 

        // does, set the clip region's rect to the intersection, then DRAW! 

        if (SectRect( &windowRect, &gDeviceRect, &intersectingRect ))

        {

            // The intersectingRect is in global coords. Convert to local 

            GlobalToLocal((Point *)&intersectingRect.top);

            GlobalToLocal((Point *)&intersectingRect.bottom);

            ClipRect( &intersectingRect );

            doDraw( depth, &intersectingRect );

        }

        // Get the next device in the list. 

        gDevice = GetNextDevice( gDevice );

    }

    DisposeRgn(rgnHandle);

}

void doDraw( depth)

int     depth;

{

    int             i;

    int             totalColors;

    int             penThickness;

    //RGBColor      color;

    CTabHandle      ctable;

    Str255          string = "\pDirect Colors";

    Rect            tempRect1;

    if (depth > 8)

    {

        BackColor( blackColor );

        ForeColor( blueColor );

        /* Draw text for direct colors mode. */

        //EraseRect( &gWindow->portRect );

        EraseRect( GetPortBounds(GetWindowPort(gWindow), &tempRect1));

        //MoveTo( (gWindow->portRect.right - StringWidth( string )) / 2, 130 );

        MoveTo((GetPortBounds(GetWindowPort(gWindow), &tempRect1)->right - StringWidth(string)) / 2, 130);

        DrawString( string );

    }

    else

    {

        /* Get the colortable at this depth. */

        ctable = GetCTable( depth );

        /* Set the line thickness to a fraction of the window height. */

        totalColors = (2 << depth) / 2;

        //penThickness = gWindow->portRect.bottom / totalColors;

        penThickness = GetPortBounds(GetWindowPort(gWindow), &tempRect1)->bottom / totalColors;

        PenSize( 1, penThickness );

        /* Now draw the colors at this depth. */

        for (i = 0; i < totalColors; i++)

        {

            RGBForeColor( &(**ctable).ctTable[i].rgb );

            MoveTo( 0, i * penThickness );

            //LineTo( gWindow->portRect.right, i * penThickness );

            LineTo(GetPortBounds(GetWindowPort(gWindow), &tempRect1)->right, i * penThickness);

        }

        /* Release the colortable memory. */

        DisposeCTable( ctable );

    }

}

void doEventLoop()

{

    EventRecord event;

    WindowPtr   window;

    short       clickArea;

    Rect        screenRect;

    for (;;)

    {

        if (WaitNextEvent( everyEvent, &event, 0, nil ))

        {

            if (event.what == mouseDown)

            {

                clickArea = FindWindow( event.where, &window );

                if (clickArea == inDrag)

                {

                    //screenRect = (**GetGrayRgn()).rgnBBox;

                    GetRegionBounds(GetGrayRgn(), &screenRect);

                    DragWindow( window, event.where, &screenRect );

                }

                else if (clickArea == inContent)

                {

                    if (window != FrontWindow())

                        SelectWindow( window );

                }

                else if (clickArea == inGoAway)

                    if (TrackGoAway( window, event.where ))

                        return;

            }

            else if (event.what == updateEvt)

            {

                window = (WindowPtr)event.message;  

                //SetPort( window );

                SetPortWindowPort( window );

                BeginUpdate( window );

                doMyDeviceLoop();

                EndUpdate( window );

            }

        }

    }

}