/*

    File:       ZoomRecter.c

    Contains:   This snippet shows how to do "Finder" style zooming between two rectangles.

                The boolean flag "kZoomLarger" controls the proportional direction of the

                zooming.

                To get the two rectangles, you drag them out rubberbanded, and the zoom

                occurs between them.  To quit, click the close box.

                If you want to do zooms between windows, open up a port with the dimensions

                of the desktop (from GetGrayRgn()).

                DON'T use this as a sample of how to do rubberband drawing!!!  It's sort of

                hacked together bypassing the event mechanism and just using Button().

    Written by: SF  

    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.  Changed basic code

                                    significantly so it would simply work better.....

        7/14/1999   KG              Updated for Metrowerks Codewarror Pro 2.1

*/

#include "CarbonPrefix.h"

#define kNumSteps       14

#define kRectsVisible   4

#define kZoomRatio      .7

#define kDelayTicks     1

#define kZoomLarger     true        // change this to zoom "inward"

void InitStuff(void);

void ZoomRect(Boolean zoomOut,Rect *smallRect, Rect *bigRect);

void CalcRect(Rect *theRect,Rect *smallRect,Rect *bigRect,double stepValue);

//Boolean GetRects(Rect *zoomFrom,Rect *zoomTo);

void FixRect(Rect *theRect,Rect *rightRect);

void doEventLoop();

void GetRect(Rect *zoomFrom, Rect *zoomTo);

Boolean gDone = false;

WindowPtr gWindow;

int main()

{

    Rect bounds = {44,12,330,500}/*,zoomFrom,zoomTo*/;

    //Rect  tempRect1;  //used for carbonization

    InitStuff();

    gWindow = NewWindow(nil,&bounds,"\pDrag Two Rects to Zoom",true,documentProc,(WindowPtr)-1L,true,0);

    //SetPort(window);

    SetPortWindowPort(gWindow);

    /*do {

        if (GetRects(&zoomFrom,&zoomTo))

            ZoomRect(kZoomLarger,&zoomFrom,&zoomTo);

        //EraseRect(&window->portRect);

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

    }

    while (!gDone);*/

    doEventLoop();

    FlushEvents(everyEvent,0);

        return 0;

}

void InitStuff(void)

{

    //InitGraf(&qd.thePort);

    //InitFonts();

    //InitWindows();

    //InitMenus();

    //TEInit();

    //InitDialogs(nil);

    InitCursor();

    FlushEvents(everyEvent,0);

}

void ZoomRect(Boolean zoomLarger,Rect *smallRect, Rect *bigRect)

{

    double firstStep,stepValue,trailer,zoomRatio;

    short i,step;

    Rect curRect;

    unsigned long ticks;

    Pattern grayPattern; //used in carbonization

    RgnHandle rgnHandle = NewRgn();

    GrafPtr oldPort;

    Rect    tempRect1;

    GetPort(&oldPort);

    SetPort(GetWindowPort(gWindow));

    //PenPat(&qd.gray);

    PenPat(GetQDGlobalsGray(&grayPattern));

    PenMode(patXor);

    firstStep=kZoomRatio;

    for (i=0; i<kNumSteps; i++) {

        firstStep *= kZoomRatio;

    }

    if (!zoomLarger) {

        zoomRatio = 1.0/kZoomRatio;

        firstStep = 1.0-firstStep;

    }

    else

        zoomRatio = kZoomRatio;

    trailer = firstStep;

    stepValue = firstStep;

    for (step=0; step<(kNumSteps+kRectsVisible); step++) {

        // draw new frame

        if (step<kNumSteps) {

            stepValue /= zoomRatio;

            CalcRect(&curRect,smallRect,bigRect,stepValue);

            FrameRect(&curRect);

        }

        // erase old frame

        if (step>=kRectsVisible) {

            trailer /= zoomRatio;

            CalcRect(&curRect,smallRect,bigRect,trailer);

            FrameRect(&curRect);

        }

        QDFlushPortBuffer(GetWindowPort(gWindow), GetPortVisibleRegion(GetWindowPort(gWindow), rgnHandle));

        Delay(kDelayTicks,&ticks);

    }

    PenNormal();

    DisposeRgn(rgnHandle);

    smallRect->top = bigRect->top = -1;

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

    SetPort(oldPort);

}

void CalcRect(Rect *theRect,Rect *smallRect,Rect *bigRect,double stepValue)

{

    theRect->left = smallRect->left + (short)((double)(bigRect->left-smallRect->left)*stepValue);

    theRect->top = smallRect->top + (short)((double)(bigRect->top-smallRect->top)*stepValue);

    theRect->right = smallRect->right + (short)((double)(bigRect->right-smallRect->right)*stepValue);

    theRect->bottom = smallRect->bottom + (short)((double)(bigRect->bottom-smallRect->bottom)*stepValue);

}

// Old version, would require that you drag 2 rects before letting the event loop continue

/*Boolean GetRects(Rect *zoomFrom,Rect *zoomTo)

{

    short numRects = 0;

    //EventRecord ev;

    Rect theRect,drawRect;

    Point firstPt,curPt,oldPt,globalPt;

    //KeyMap theKeys;

    WindowPtr window;

    Boolean result = true;

    RgnHandle rgnHandle = NewRgn();

    PenMode(patXor);

    do {

        while (!Button()) {

            GetMouse(&globalPt);

            LocalToGlobal(&globalPt);

            if ((FindWindow(globalPt,&window)==inGoAway) && window==FrontWindow()) {

                gDone = true;

                result = false;

            }

            GetMouse(&firstPt);

            oldPt = firstPt;

            SetRect(&theRect,firstPt.h,firstPt.v,firstPt.h,firstPt.v);

        }

        if (gDone)

            break;

        while (Button()) {

            GetMouse(&curPt);

            if (!EqualPt(curPt,oldPt)) {

                FixRect(&theRect,&drawRect);

                FrameRect(&drawRect);

                oldPt = curPt;

                theRect.right = curPt.h;

                theRect.bottom = curPt.v;

                FixRect(&theRect,&drawRect);

                FrameRect(&drawRect);

            }

        }

        FixRect(&theRect,&drawRect);

        if (numRects==0)

            *zoomFrom = drawRect;

        else

            *zoomTo = drawRect;

        numRects++;

        QDFlushPortBuffer(GetWindowPort(window), GetPortVisibleRegion(GetWindowPort(window), rgnHandle));

    } while (numRects<2);

    PenNormal();

    DisposeRgn(rgnHandle);

    return result;

}*/

// New Version of GetRect(s), modified from original to only handle one dragged rect at a time.

void GetRect(Rect *zoomFrom, Rect *zoomTo)

{

    static short numRects = 0;

    Rect theRect,drawRect;

    Point firstPt,curPt,oldPt;

    RgnHandle rgnHandle = NewRgn();

    GrafPtr oldPort;

    GetPort(&oldPort);

    SetPort(GetWindowPort(gWindow));

    PenMode(patXor);

    GetMouse(&firstPt);

    oldPt = firstPt;

    SetRect(&theRect,firstPt.h,firstPt.v,firstPt.h,firstPt.v);

    while (Button()) {

        GetMouse(&curPt);

        if (!EqualPt(curPt,oldPt)) {

            FixRect(&theRect,&drawRect);

            FrameRect(&drawRect);

            oldPt = curPt;

            theRect.right = curPt.h;

            theRect.bottom = curPt.v;

            FixRect(&theRect,&drawRect);

            FrameRect(&drawRect);

            QDFlushPortBuffer(GetWindowPort(gWindow), GetPortVisibleRegion(GetWindowPort(gWindow), rgnHandle));

        }

    }

    FixRect(&theRect,&drawRect);

    if (numRects==0)

        *zoomFrom = drawRect;

    else

        *zoomTo = drawRect;

    numRects++;

    QDFlushPortBuffer(GetWindowPort(gWindow), GetPortVisibleRegion(GetWindowPort(gWindow), rgnHandle));

    if (numRects >= 2) {

        ZoomRect(kZoomLarger, zoomFrom, zoomTo);

        numRects = 0;

    }

    PenNormal();

    DisposeRgn(rgnHandle);

    SetPort(oldPort);

}

void FixRect(Rect *theRect,Rect *rightRect)

{

    if (theRect->right > theRect->left) {

        rightRect->right = theRect->right;

        rightRect->left = theRect->left;

    }

    else {

        rightRect->right = theRect->left;

        rightRect->left = theRect->right;

    }

    if (theRect->bottom > theRect->top) {

        rightRect->bottom = theRect->bottom;

        rightRect->top = theRect->top;

    }

    else {

        rightRect->bottom = theRect->top;

        rightRect->top = theRect->bottom;

    }

}

void doEventLoop()

{

    EventRecord anEvent;

    WindowPtr   evtWind;

    short       clickArea;

    Rect        screenRect;

    Point       thePoint;

    Rect        zoomFrom, zoomTo;

    zoomFrom.top = zoomTo.top = -1;

    while (!gDone)

    {

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

        {

            if (anEvent.what == mouseDown)

            {

                clickArea = FindWindow( anEvent.where, &evtWind );

                if (clickArea == inDrag)

                {

                    GetRegionBounds( GetGrayRgn(), &screenRect );

                    DragWindow( evtWind, anEvent.where, &screenRect );

                }

                else if (clickArea == inContent)

                {

                    if (evtWind != FrontWindow())

                        SelectWindow( evtWind );

                    else

                    {

                        thePoint = anEvent.where;

                        GlobalToLocal( &thePoint );

                        //Handle click in window content here

                        GetRect(&zoomFrom, &zoomTo);

                    }

                }

                else if (clickArea == inGoAway)

                    if (TrackGoAway( evtWind, anEvent.where ))

                        gDone = true;

            }

            else if (anEvent.what == updateEvt)

            {

                evtWind = (WindowPtr)anEvent.message;   

                SetPortWindowPort( evtWind );

                BeginUpdate( evtWind );

                //Call Draw Function here....

                if (zoomFrom.top != -1)

                    FrameRect(&zoomFrom);

                if (zoomTo.top != -1)

                    FrameRect(&zoomTo);

                EndUpdate (evtWind);

            }

        }

    }

}