/*

    File:       HIVeryBasicView.cp

    Contains:   A very basic custom view which implements a simple colorful shaped button.

    Version:    1.0

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

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    Copyright © 2007 Apple, Inc., All Rights Reserved

*/

//****************************************************

#pragma mark -

#pragma mark * includes & imports *

#include "HIFleetingControlsView.h"

#include "HIVeryBasicView.h"

//****************************************************

#pragma mark -

#pragma mark * typedef's, struct's, enums, defines, etc. *

typedef struct

    {

    HIViewRef   view;

    UInt32      shape;

    UInt32      mainColor;

    } VeryBasicViewData;

//****************************************************

#pragma mark -

#pragma mark * local (static) function prototypes *

static pascal OSStatus VeryBasicViewHandler(EventHandlerCallRef inCaller, EventRef inEvent, void * inRefcon);

//****************************************************

#pragma mark -

#pragma mark * exported function implementations *

/*

 *  HIVeryBasicViewCreate(outVeryBasic)

 *  

 *  Summary:

 *    Creates a VeryBasic custom HIView.

 *  

 *  Parameters:

 *    

 *    outVeryBasic:

 *      On exit, contains the new control.

 */

extern OSStatus HIVeryBasicViewCreate(HIViewRef * outVeryBasic)

    {

    OSStatus status = noErr;

    HIObjectRef hiObject;

    status = HIObjectCreate(GetVeryBasicViewClass(), NULL, &hiObject);

    require_noerr(status, HIObjectCreate);

    *outVeryBasic = (HIViewRef)hiObject;

HIObjectCreate:

    return status;

    }

/*

 *  GetVeryBasicViewClass()

 *  

 *  Summary:

 *    Registers and returns the class ID string.

 */

extern CFStringRef GetVeryBasicViewClass()

    {

    static HIObjectClassRef theClass;

    if (theClass == NULL)

        {

        static EventTypeSpec kFactoryEvents[] =

            {

                { kEventClassHIObject, kEventHIObjectConstruct },

                { kEventClassHIObject, kEventHIObjectDestruct },

                { kEventClassControl, kEventControlDraw },

                { kEventClassControl, kEventControlHitTest },

                { kEventClassControl, kEventControlHiliteChanged }

            };

        HIObjectRegisterSubclass(kVeryBasicViewClassID, kHIViewClassID, 0, VeryBasicViewHandler,

                                  GetEventTypeCount(kFactoryEvents), kFactoryEvents, 0, &theClass);

        }

    return kVeryBasicViewClassID;

    }

/*****************************************************/

#pragma mark -

#pragma mark * local (static) function implementations *

/*

 *  FleetingControlsViewDrawing(context, bounds, myData)

 *  

 *  Summary:

 *    Draws the contents of the view. Just a colored (red, green, blue) shape (ring, disc, square)...

 *  

 *  Parameters:

 *    

 *    context:

 *      The CGContext of our view.

 *    bounds:

 *      The HIRect/CGRect to draw in.

 *    myData:

 *      The private data of our view.

 *    alpha:

 *      The alpha value to multiply all our colors with. An iterating diminishing alpha will produce the fading effect.

 */

static OSStatus VeryBasicViewDrawing(CGContextRef context, const HIRect * bounds, const VeryBasicViewData * myData, float alpha)

    {

    OSStatus status = noErr;

    CGContextSetLineWidth(context, 5);

    CGRect drawBounds = *bounds;

    float color;

    if ((!IsControlHilited(myData->view)) || (!HIViewIsActive(myData->view, NULL)))

        color = 1.0;

    else

        color = 0.2;

    switch (myData->mainColor)

        {

        case 0: CGContextSetRGBFillColor(context, color, 0.2, 0.2, alpha * 0.8); CGContextSetRGBStrokeColor(context, color, 0.2, 0.2, alpha * 0.8); break;

        case 1: CGContextSetRGBFillColor(context, 0.2, color, 0.2, alpha * 0.8); CGContextSetRGBStrokeColor(context, 0.2, color, 0.2, alpha * 0.8); break;

        case 2: CGContextSetRGBFillColor(context, 0.2, 0.2, color, alpha * 0.8); CGContextSetRGBStrokeColor(context, 0.2, 0.2, color, alpha * 0.8); break;

        }

    switch (myData->shape)

        {

        case 0: CGContextFillRect(context, drawBounds); break;

        case 1: CGContextFillEllipseInRect(context, drawBounds); break;

        case 2: drawBounds = CGRectInset(drawBounds, 5, 5); CGContextStrokeEllipseInRect(context, drawBounds); break;

        }

    return status;

    }

/*

 *  VeryBasicViewHandler()

 *  

 *  Summary:

 *    Event handler that implements our FleetingControls view.

 */

static pascal OSStatus VeryBasicViewHandler(EventHandlerCallRef inCaller, EventRef inEvent, void * inRefcon)

    {

    OSStatus status = eventNotHandledErr;

    VeryBasicViewData * myData = (VeryBasicViewData *)inRefcon;

    switch (GetEventClass(inEvent))

        {

        case kEventClassHIObject:

            switch (GetEventKind(inEvent))

                {

#pragma mark *   kEventHIObjectConstruct

                case kEventHIObjectConstruct:

                    {

                    myData = (VeryBasicViewData *) calloc(1, sizeof(VeryBasicViewData));

                    require(myData != NULL, calloc);

                    HIViewRef epView;

                    status = GetEventParameter(inEvent, kEventParamHIObjectInstance, typeHIObjectRef, NULL, sizeof(epView), NULL, &epView);

                    require_noerr(status, GetEventParameter);

                    myData->view = epView;

                    static UInt32 colshape = 1;

                    myData->shape = ++colshape % 3;

                    myData->mainColor = myData->shape;

                    status = SetEventParameter(inEvent, kEventParamHIObjectInstance, typeVoidPtr, sizeof(myData), &myData);

                    require_noerr(status, SetEventParameter);

                    break;

                    }

                case kEventHIObjectDestruct:

                    {

                    free(myData);

                    status = noErr;

                    break;

                    }

                default:

                    break;

                }

            break;

        case kEventClassControl:

            switch (GetEventKind(inEvent))

                {

#pragma mark *   kEventControlDraw

                case kEventControlDraw:

                {

                    CGContextRef context;

                    status = GetEventParameter(inEvent, kEventParamCGContextRef, typeCGContextRef, NULL, sizeof(context), NULL, &context);

                    require_noerr(status, GetEventParameter);

                    HIRect bounds;

                    status = HIViewGetBounds(myData->view, &bounds);

                    require_noerr(status, HIViewGetBounds);

                    float alpha = HIFleetingControlViewGetAlphaIfEmbedded(myData->view);

                    // now that the proper parameters and configurations have been dealt with, let's draw

                    status = VeryBasicViewDrawing(context, &bounds, myData, alpha);

                    require_noerr(status, VeryBasicViewDrawing);

                    break;

                }

                case kEventControlHitTest:

                {

                    HIPoint  pt;

                    HIRect  bounds;

                    // the point parameter is in view-local coords.

                    status = GetEventParameter(inEvent, kEventParamMouseLocation, typeHIPoint, NULL, sizeof(pt), NULL, &pt);

                    require_noerr(status, GetEventParameter);

                    HIViewGetBounds(myData->view, &bounds);

                    if (CGRectContainsPoint(bounds, pt))

                    {

                        ControlPartCode part = kControlButtonPart;

                        status = SetEventParameter(inEvent, kEventParamControlPart, typeControlPartCode, sizeof(part), &part);

                        require_noerr(status, SetEventParameter);

                    }

                    break;

                }

                case kEventControlHiliteChanged:

                {

                    HIViewSetNeedsDisplay(myData->view, true);

                    break;

                }

                default:

                    break;

                }

            break;

        default:

            break;

        }

SetEventParameter:

GetEventParameter:

calloc:

CallNextEventHandler:

HIViewGetBounds:

VeryBasicViewDrawing:

    return status;

    }