/*

 File: DrawProcs.c

 Abstract: //   This file contains the functions that draw the content

           //   in the windows.

 Version: 1.0

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 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

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 OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

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 */ 

#include "DrawProcs.h"

#include "arcs.h"

#include "ovals.h"

#include "rects.h"

/*

ArcsDrawEventHandler : Handles the draw events for the "Arcs" window.

Parameter DescriptionsinHandler : A reference to the current handler call chain. This is passed to your handler so that you can call CallNextEventHandler if you need to.

inEvent : The event that triggered this call.

inUserData : The application-specific data you passed in to InstallEventHandler.

*/

OSStatus ArcsDrawEventHandler (EventHandlerCallRef inHandler, EventRef inEvent, void* inUserData) {

    OSStatus status = eventNotHandledErr;

    CGContextRef context;

    CGRect r;

    //CallNextEventHandler in order to make sure the default handling of the inEvent 

    // (drawing the white background) happens

    status = CallNextEventHandler( inHandler, inEvent );

    require_noerr(status, CantCallNextEventHandler);

    // Get the CGContextRef

    status = GetEventParameter (inEvent, 

                                kEventParamCGContextRef, 

                                typeCGContextRef, 

                                NULL, 

                                sizeof (CGContextRef),

                                NULL,

                                &context);

    require_noerr(status, CantGetEventParameter);

    //  Draw the outer arcs in the left portion of the window

    r.size.height = 210;

    r.origin.x = 20;

    r.origin.y = 20;

    r.size.width = 210;

    frameArc(context, r, 0, 135);

    frameArc(context, r, 180 - 10, 20);

    frameArc(context, r, 225, 45);

    frameArc(context, r, 315 - 20, 40);

    // Draw the inner arcs in the left portion of the window

    r.size.height = 145;

    r.origin.x = 75;

    r.origin.y = 55;

    r.size.width = 100;

    frameArc(context, r, 0, 135);

    frameArc(context, r, 180 - 10, 20);

    frameArc(context, r, 225, 45);

    frameArc(context, r, 315 - 20, 40);

    /* Set the fill color to green. */

    CGContextSetRGBFillColor(context, 0, 1, 0, 1);

    // Draw and fill the outer arcs in the right portion of the window

    r.size.height = 210;

    r.origin.x = 270;

    r.origin.y = 20;

    r.size.width = 210;

    paintArc(context, r, 0, 135);

    paintArc(context, r, 180 - 10, 20);

    paintArc(context, r, 225, 45);

    paintArc(context, r, 315 - 20, 40);

    /* Set the fill color to yellow. */

    CGContextSetRGBFillColor(context, 1, 1, 0, 1);

    // Draw and fill the inner arcs in the right portion of the window

    r.size.height = 145;

    r.origin.x = 325;

    r.origin.y = 55;

    r.size.width = 100;

    paintArc(context, r, 0, 135);

    paintArc(context, r, 180 - 10, 20);

    paintArc(context, r, 225, 45);

    paintArc(context, r, 315 - 20, 40);

CantCallNextEventHandler:

CantGetEventParameter:

        return status;

}

/*

OvalsDrawEventHandler : Handles the draw events for the "Ovals" window.

Parameter DescriptionsinHandler : A reference to the current handler call chain. This is passed to your handler so that you can call CallNextEventHandler if you need to.

inEvent : The event that triggered this call.

inUserData : The application-specific data you passed in to InstallEventHandler.

*/

OSStatus OvalsDrawEventHandler (EventHandlerCallRef inHandler, EventRef inEvent, void* inUserData) {

    OSStatus status = eventNotHandledErr;

    CGContextRef context;

    CGRect r;

    //CallNextEventHandler in order to make sure the default handling of the inEvent 

    // (drawing the white background) happens

    status = CallNextEventHandler( inHandler, inEvent );

    require_noerr(status, CantCallNextEventHandler);

    // Get the CGContextRef

    status = GetEventParameter (inEvent, 

                                kEventParamCGContextRef, 

                                typeCGContextRef, 

                                NULL, 

                                sizeof (CGContextRef),

                                NULL,

                                &context);

    require_noerr(status, CantGetEventParameter);

    // Draw the outer oval in the left portion of the window

    r.size.height = 210;

    r.origin.x = 20;

    r.origin.y = 20;

    r.size.width = 210;

    frameOval(context, r);

    // Draw the inner oval in the left portion of the window

    r.size.height = 145;

    r.origin.x = 75;

    r.origin.y = 55;

    r.size.width = 100;

    frameOval(context, r);

    /* Set the fill color to green. */

    CGContextSetRGBFillColor(context, 0, 1, 0, 1);

    // Draw and fill the outter oval in the right portion of the window

    r.size.height = 210;

    r.origin.x = 270;

    r.origin.y = 20;

    r.size.width = 210;

    paintOval(context, r);

    /* Set the fill color to yellow. */

    CGContextSetRGBFillColor(context, 1, 1, 0, 1);

    // Draw and fill the inner oval in the right portion of the window

    r.size.height = 145;

    r.origin.x = 325;

    r.origin.y = 55;

    r.size.width = 100;

    paintOval(context, r);

CantCallNextEventHandler:

CantGetEventParameter:

        return status;

}

/*

RectanglesDrawEventHandler : Handles the draw events for the "Rectangles" window.

Parameter DescriptionsinHandler : A reference to the current handler call chain. This is passed to your handler so that you can call CallNextEventHandler if you need to.

inEvent : The event that triggered this call.

inUserData : The application-specific data you passed in to InstallEventHandler.

*/

OSStatus RectanglesDrawEventHandler (EventHandlerCallRef inHandler, EventRef inEvent, void* inUserData) {

    OSStatus status = eventNotHandledErr;

    CGContextRef context;

    CGRect r;

    //CallNextEventHandler in order to make sure the default handling of the inEvent 

    // (drawing the white background) happens

    status = CallNextEventHandler( inHandler, inEvent );

    require_noerr(status, CantCallNextEventHandler);

    // Get the CGContextRef

    status = GetEventParameter (inEvent, 

                                kEventParamCGContextRef, 

                                typeCGContextRef, 

                                NULL, 

                                sizeof (CGContextRef),

                                NULL,

                                &context);

    require_noerr(status, CantGetEventParameter);

    /* Set the stroke color to black. */

    CGContextSetRGBStrokeColor(context, 0, 0, 0, 1);

    r.size.height = 210;

    r.origin.x = 20;

    r.origin.y = 20;

    r.size.width = 210;

    frameRect(context, r);

    r.size.height = 145;

    r.origin.x = 75;

    r.origin.y = 55;

    r.size.width = 100;

    frameRect(context, r);

    /* Set the fill color to green. */

    CGContextSetRGBFillColor(context, 0, 1, 0, 1);

    r.size.height = 210;

    r.origin.x = 270;

    r.origin.y = 20;

    r.size.width = 210;

    paintRect(context, r);

    /* Set the fill color to yellow. */

    CGContextSetRGBFillColor(context, 1, 1, 0, 1);

    r.size.height = 145;

    r.origin.x = 325;

    r.origin.y = 55;

    r.size.width = 100;

    paintRect(context, r);

CantCallNextEventHandler:

CantGetEventParameter:

        return status;

}

/*

OvalTeenDrawEventHandler : Handles the draw events for the "Ovalteen" window.

Parameter DescriptionsinHandler : A reference to the current handler call chain. This is passed to your handler so that you can call CallNextEventHandler if you need to.

inEvent : The event that triggered this call.

inUserData : The application-specific data you passed in to InstallEventHandler.

*/

OSStatus OvalTeenDrawEventHandler (EventHandlerCallRef inHandler, EventRef inEvent, void* inUserData) {

    OSStatus status = eventNotHandledErr;

    CGContextRef context;

    CGRect bounds;

    double a, b;

    int count, k;

    //CallNextEventHandler in order to make sure the default handling of the inEvent 

    // (drawing the white background) happens

    status = CallNextEventHandler( inHandler, inEvent );

    require_noerr(status, CantCallNextEventHandler);

    // Get the CGContextRef

    status = GetEventParameter (inEvent, 

                                kEventParamCGContextRef, 

                                typeCGContextRef, 

                                NULL, 

                                sizeof (CGContextRef),

                                NULL,

                                &context);

    require_noerr(status, CantGetEventParameter);

    // Get the bounding rectangle

    status = HIViewGetBounds ((HIViewRef) inUserData, &bounds);

    require_noerr(status, CantGetViewBounds);

    // Calculate the dimensions for an oval inside the bounding box

    a = 0.9 * bounds.size.width/4;

    b = 0.3 * bounds.size.height/2;

    count = 5;

    // Set the fill color to a partially transparent blue

    CGContextSetRGBFillColor(context, 0, 0, 1, 0.5);

    // Set the stroke color to an opaque black

    CGContextSetRGBStrokeColor(context, 0, 0, 0, 1);

    // Set the line width to be used, in user space units.

    CGContextSetLineWidth(context, 3);

    // Save the conexts state because we are going to be moving the origin and

    // rotating context for drawing, but we would like to restore the current

    // state before drawing the next image.

    CGContextSaveGState(context);

    // Move the origin to the middle of the first image (left side) to draw.

    CGContextTranslateCTM(context, bounds.size.width/4, bounds.size.height/2);

    // Draw "count" ovals, rotating the context around the newly translated origin

    // 1/count radians after drawing each oval

    for (k = 0; k < count; k++)

         {

         // Paint the oval with the fill color

        paintOval(context, CGRectMake(-a, -b, 2 * a, 2 * b));

        // Frame the oval with the stroke color

        frameOval(context, CGRectMake(-a, -b, 2 * a, 2 * b));

        // Rotate the context around the center of the image

        CGContextRotateCTM(context, pi / count);

         }

    // Restore the saved state to a known state for dawing the next image

    CGContextRestoreGState(context);

    // Calculate a bounding box for the rounded rect

    a = 0.9 * bounds.size.width/4;

    b = 0.3 * bounds.size.height/2;

    count = 5;

    // Set the fill color to a partially transparent red

    CGContextSetRGBFillColor(context, 1, 0, 0, 0.5);

    // Set the stroke color to an opaque black

    CGContextSetRGBStrokeColor(context, 0, 0, 0, 1);

    // Set the line width to be used, in user space units.

    CGContextSetLineWidth(context, 3);

    // Save the conexts state because we are going to be moving the origin and

    // rotating context for drawing, but we would like to restore the current

    // state before drawing the next image.

    CGContextSaveGState(context);

    // Move the origin to the middle of the second image (right side) to draw.

    CGContextTranslateCTM(context, bounds.size.width/4 + bounds.size.width/2, bounds.size.height/2);

    for (k = 0; k < count; k++)

         {

         // Fill then stroke the rounding rect, otherwise the fill would cover the stroke

        fillRoundedRect(context, CGRectMake(-a, -b, 2 * a, 2 * b), 20, 20);

        strokeRoundedRect(context, CGRectMake(-a, -b, 2 * a, 2 * b), 20, 20);

        // Rotate the context for the next rounded rect

        CGContextRotateCTM(context, pi / count);

         }

    CGContextRestoreGState(context);

CantCallNextEventHandler:

CantGetEventParameter:

CantGetViewBounds:

        return status;

}