/*

File: Help.c

Abstract: Sets help balloons for the preferences window.

Version: 1.0

Change History:

    <1.0>   first release version

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*/

#include "ExamplePrefs.h"

#include "Help.h"

#include "PrefsDialog.h"

#include <Balloons.h>

#include <Lists.h>

#include <Quickdraw.h>

enum

{

    kInList       = 0,

    kInStaticText = 1,

    kInUserPane   = 2,

    kNotInHotRect = 3

};

// --------------------------------------------------------------------------------------

void CalculateBalloonHelpRects(WindowRef prefsWindow)

{

    GrafPtr savedPort;

    ListHandle iconList;

    Point tips[3];

    Rect hotRects[3], userPaneBounds;

    ControlRef rootControl, userPane;

    GetPort(&savedPort);

    SetPortWindowPort(prefsWindow);

    GetWindowProperty(prefsWindow, kAppSignature, kIconListTag, sizeof(ListHandle), NULL, 

                        &iconList);

    SetPt(&tips[0], kPlatinumWindowEdgeSpacing + kListWidth, kPlatinumWindowEdgeSpacing + 10);

    SetRect(&hotRects[0], (*iconList)->rView.left, (*iconList)->rView.top, 

            (*iconList)->rView.right, (*iconList)->rView.bottom);   // set the icon list tip 

                                                                    // and hot rectangle

    SetPt(&tips[1], 203, 219);          // set the static text tip and hot rectangle

    SetRect(&hotRects[1], 149, 213, 213, 229);  // these coordinates are all arbitrary

    GetRootControl(prefsWindow, &rootControl);          // the only thing embedded in the 

    GetIndexedSubControl(rootControl, 1, &userPane);    // root control is the user panes and 

    SetRect(&userPaneBounds, (*userPane)->contrlRect.left, (*userPane)->contrlRect.top, 

            (*userPane)->contrlRect.right, (*userPane)->contrlRect.bottom);     // they're 

                                                                        // all the same size

    SetPt(&tips[2], userPaneBounds.right - 10, userPaneBounds.top + 10);

    SetRect(&hotRects[2], userPaneBounds.left, userPaneBounds.top, userPaneBounds.right, 

            userPaneBounds.bottom);     // set the user pane tip and hot rectangle

    SetWindowProperty(prefsWindow, kAppSignature, kBalloonTipsTag, 3 * sizeof(Point), tips);

    SetWindowProperty(prefsWindow, kAppSignature, kHotRectsTag, 3 * sizeof(Rect), hotRects);

    SetPort(savedPort);

}

// --------------------------------------------------------------------------------------

void DisplayHelpBalloons(WindowRef prefsWindow)

{

    GrafPtr savedPort;

    Point mouseLocation;

    Rect hotRects[3];

    short hotRectID;

    static int previousHotRectID = kNotInHotRect;

    GetPort(&savedPort);

    SetPortWindowPort(prefsWindow);

    GetMouse(&mouseLocation);

    GetWindowProperty(prefsWindow, kAppSignature, kHotRectsTag, 3 * sizeof(Rect), NULL, 

                        hotRects);

    for (hotRectID = kInList; hotRectID < kNotInHotRect; hotRectID++)

    {

        if (PtInRect(mouseLocation, &hotRects[hotRectID]))

        {

            if (hotRectID != previousHotRectID)

            {

                HMMessageRecord helpMessage;

                Point tips[3];

                helpMessage.hmmHelpType = khmmStringRes;

                helpMessage.u.hmmStringRes.hmmResID = rHelpStrings;

                helpMessage.u.hmmStringRes.hmmIndex = hotRectID + 1;

                GetWindowProperty(prefsWindow, kAppSignature, kBalloonTipsTag, 

                                    3 * sizeof(Point), NULL, tips);

                LocalToGlobal(&tips[hotRectID]);

                LocalToGlobal(&topLeft(hotRects[hotRectID]));

                LocalToGlobal(&botRight(hotRects[hotRectID]));

                HMShowBalloon(&helpMessage, tips[hotRectID], &hotRects[hotRectID], NULL, 

                                kBalloonWDEFID, kTopLeftTipPointsLeftVariant, 

                                kHMRegularWindow);

            }

            break;

        }

    }

    previousHotRectID = hotRectID;

    SetPort(savedPort);

}