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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<!-- BEGIN META TAG INFO -->
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="home" href="http://developer.apple.com/">
<link rel="find" href="http://developer.apple.com/search/">
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<script language="JavaScript" src="../../documentation/js/adc.js" type="text/javascript"></script>
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<title>ClockView - /TClockView.cp</title>
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<td><img width="340" height="10" src="images/1dot.gif" alt=""></td>
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<td align="left" colspan="2">
<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/Carbon/index.html">Carbon</a> > <a href="../../samplecode/Carbon/idxHumanInterfaceToolbox-date.html">Human Interface Toolbox</a> > <A HREF="javascript:location.replace('index.html');">ClockView</A> >
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<table width="680" border="0" cellpadding="0" cellspacing="0">
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<td><h1><div id="pagehead">ClockView</div></h1></td>
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<h2>/TClockView.cp</h2>
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<p><strong>View Source Code:</strong>
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<option value="listing1.html">/main.cp</option>
<option value="listing2.html">/TClockView.cp</option>
<option value="listing3.html">/TClockView.h</option></select>
</p>
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<p><strong><a href="ClockView.zip">Download Sample</a></strong> (“ClockView.zip”, 17.6K)<BR>
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<pre class="sourcecodebox">/*
File: TClockView.cp
Version: 1.0
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 Apple's
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.
Copyright © 2002 Apple Computer, Inc., All Rights Reserved
*/
#include <Carbon/Carbon.h>
#include "TClockView.h"
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
//-----------------------------------------------------------------------------------
// types
//-----------------------------------------------------------------------------------
//
typedef struct
{
float red;
float green;
float blue;
} CGRGB;
//-----------------------------------------------------------------------------------
// prototypes
//-----------------------------------------------------------------------------------
//
HIPoint RotatePoint(
HIPoint inPoint,
HIPoint inRotationCenter,
float inAngle ); // radians
void RotateLine(
HIPoint* inStart,
HIPoint* inEnd,
const HIPoint* inRotationCenter,
float inAngle );
void DrawShadowPath(
CGContextRef inContext,
CGPathRef inPath,
float inLineWidth,
float inBaseGray );
void DrawPath(
CGContextRef inContext,
CGPathRef inPath,
float inLineWidth,
float inRed,
float inGreen,
float inBlue );
void CGPathAddLine(
CGMutablePathRef inPath,
const CGPoint* inStart,
const CGPoint* inEnd );
//-----------------------------------------------------------------------------------
// macros
//-----------------------------------------------------------------------------------
//
#define kTViewClassID CFSTR( "com.apple.sample.TClockView" )
#define MIN(A,B) ((A)<(B)?(A):(B))
//-----------------------------------------------------------------------------------
// constants
//-----------------------------------------------------------------------------------
// Wow! That's a lot of constants! Wait until you see where they get used!
//
const float kDegree = M_PI/180;
const float kShadowAlpha = 0.5;
const float kShadowX = 0;
const float kShadowY = 1;
const float kInnerFrameInset = 3;
const float kHourTickInset = 3;
const float kMinuteTickInset = 5;
const float kMinuteTickHeight = 1;
const float kHourHandRatio = 1.0/2;
const float kHourHandExtraRatio = 1.0/12;
const float kMinuteHandInset = 8;
const float kMinuteHandExtra = 0;
const float kSecondHandInset = 5;
const SInt16 kDigitsBoxWidth = 30;
const SInt16 kDigitsBoxHeight = kDigitsBoxWidth;
const CGRGB kHourColor = { 76.0/255, 47.0/255, 177.0/255 };
const CGRGB kMinuteColor = kHourColor;
const SInt16 kBaseDigitFontSize = 10;
const float kFontPointsPerPixel = 1.0/6;
const float kDigitOffsetPerPixel = 1.0/7;
const float kSecondHandExtraRatio = 1.0/12;
const float kMinimumRadiusWithDigits = 50;
const float kMinimumRadiusWithMinuteTicks = 25;
const float kMinimumRadiusWithDot = 35;
const float kMinimumRadiusWithInnerFrame = 15;
const float kBaseHandWidth = 1;
const float kHandWidthPerPixel = 1.0/40;
const float kBaseHourTickHeight = 2;
const float kHourTickSizePerPixel = 1.0/30;
const float kBaseDigitInset = 16;
enum
{
kAMPMLocTopLeft = 1,
kAMPMLocBotLeft,
kAMPMLocTopRight,
kAMPMLocBotRight,
kAMPMLocation = kAMPMLocBotRight
};
//-----------------------------------------------------------------------------------
// TClockView constructor
//-----------------------------------------------------------------------------------
//
TClockView::TClockView(
HIViewRef inControl )
: TView( inControl ),
fTimer( NULL )
{
ChangeAutoInvalidateFlags( kAutoInvalidateOnHilite, 0 );
}
//-----------------------------------------------------------------------------------
// TClockView destructor
//-----------------------------------------------------------------------------------
// Clean up after yourself.
//
TClockView::~TClockView()
{
if ( fTimer )
RemoveEventLoopTimer( fTimer );
}
//-----------------------------------------------------------------------------------
// GetKind
//-----------------------------------------------------------------------------------
//
ControlKind TClockView::GetKind()
{
const ControlKind kMyKind = { 'TtsV', 'TtsV' };
return kMyKind;
}
//-----------------------------------------------------------------------------------
// Create
//-----------------------------------------------------------------------------------
//
OSStatus TClockView::Create(
HIViewRef* outControl,
const HIRect* inBounds,
WindowRef inWindow )
{
OSStatus err;
EventRef event = CreateInitializationEvent();
ControlRef root;
RegisterClass();
err = HIObjectCreate( kTViewClassID, event, (HIObjectRef*) outControl );
ReleaseEvent( event );
if ( err == noErr )
{
if ( inWindow != NULL )
{
GetRootControl( inWindow, &root );
HIViewAddSubview( root, *outControl );
}
HIViewSetFrame( *outControl, inBounds );
}
return err;
}
//-----------------------------------------------------------------------------------
// RegisterClass
//-----------------------------------------------------------------------------------
//
void TClockView::RegisterClass()
{
static bool sRegistered;
if ( !sRegistered )
{
TView::RegisterSubclass( kTViewClassID, Construct );
sRegistered = true;
}
}
//-----------------------------------------------------------------------------------
// Construct
//-----------------------------------------------------------------------------------
//
OSStatus TClockView::Construct(
ControlRef inControl,
TView** outView )
{
*outView = new TClockView( inControl );
return noErr;
}
//-----------------------------------------------------------------------------------
// Initialize
//-----------------------------------------------------------------------------------
// The control is set up. Do the last minute stuff that needs to be done like
// installing an EventLoopTimer.
//
OSStatus TClockView::Initialize(
TCarbonEvent& inEvent )
{
OSStatus err;
err = TView::Initialize( inEvent );
require_noerr( err, CantInitializeParent );
// Install a timer that gets called once per second to update the clock
err = InstallEventLoopTimer( GetCurrentEventLoop(), 1 * kEventDurationSecond,
kEventDurationSecond, ClockAnimationTimer, GetViewRef(), &fTimer );
CantInitializeParent:
return err;
}
//-----------------------------------------------------------------------------------
// DrawFace
//-----------------------------------------------------------------------------------
// Draws the background of the clock.
//
void TClockView::DrawFace(
CGContextRef inContext,
float inFrameShade,
float inFillShade )
{
TRect bounds = Bounds();
TRect digitBounds;
float radius;
HIPoint center, start, end, digitCenter;
int i;
CGMutablePathRef path;
GrafPtr port;
SInt16 savedFont, savedSize;
CFStringRef string;
Rect qdBounds;
Point dimensions = { kDigitsBoxWidth, kDigitsBoxHeight };
SInt16 baseline;
float innerFrameInset = 0;
CGContextSetRGBFillColor( inContext, inFillShade, inFillShade, inFillShade, 1 );
CGContextSetRGBStrokeColor( inContext, inFrameShade, inFrameShade, inFrameShade, 1 );
// The border and the face fill
bounds.Inset( 0.5, 0.5 );
center = bounds.Center();
radius = MIN( bounds.Width(), bounds.Height() ) / 2;
CGContextAddArc( inContext, center.x, center.y, radius, 0, 360 * kDegree, 1 );
CGContextDrawPath( inContext, kCGPathFillStroke );
if ( radius >= kMinimumRadiusWithInnerFrame )
{
// The inner frame
innerFrameInset = kInnerFrameInset;
bounds = Bounds();
bounds.Inset( innerFrameInset, innerFrameInset );
radius = MIN( bounds.Width(), bounds.Height() ) / 2;
CGContextSetLineWidth( inContext, 2 );
CGContextBeginPath( inContext );
CGContextAddArc( inContext, center.x, center.y, radius, 0, 360 * kDegree, 1 );
CGContextStrokePath( inContext );
}
// The hour ticks, hour hand, minute hand and second hand are drawn with
// a kShadowY pixel drop shadow. To achieve this, a path is calculated
// for the element and it is drawn twice -- once as a shadow and once as
// the actual element. CGPaths are cool.
// The hour ticks
path = CGPathCreateMutable();
check( path );
start = CGPointMake( center.x, center.y - radius + kHourTickInset );
end = CGPointMake( start.x, start.y + kBaseHourTickHeight + radius * kHourTickSizePerPixel );
for ( i = 0; i < 12; i++ )
{
CGPathAddLine( path, &start, &end );
RotateLine( &start, &end, &center, 360.0/12 * kDegree );
}
DrawShadowPath( inContext, path, 1, inFrameShade );
DrawPath( inContext, path, 1, inFrameShade, inFrameShade, inFrameShade );
CFRelease( path );
if ( radius < kMinimumRadiusWithMinuteTicks )
return;
// The minute ticks
path = CGPathCreateMutable();
check( path );
start = CGPointMake( center.x, center.y - radius + kMinuteTickInset );
end = CGPointMake( start.x, start.y + kMinuteTickHeight );
for ( i = 0; i < 60; i++ )
{
// Don't draw over the hour ticks, which are 1 in every 5 ticks
if ( i % 5 != 0 )
CGPathAddLine( path, &start, &end );
RotateLine( &start, &end, &center, 360.0/60 * kDegree );
}
// Minute ticks don't have shadows
DrawPath( inContext, path, 1, inFrameShade, inFrameShade, inFrameShade );
CFRelease( path );
// Don't draw the digits if they are going to be all squished together
if ( radius < kMinimumRadiusWithDigits )
return;
GetPort( &port );
savedFont = GetPortTextFont( port );
savedSize = GetPortTextSize( port );
SetPortTextFont( port, systemFont );
SetPortTextSize( port, kBaseDigitFontSize + (int) ( (radius - kMinimumRadiusWithDigits) * kFontPointsPerPixel ) );
// The digits
digitCenter = CGPointMake( center.x, center.y - radius + kBaseDigitInset + ((int) radius - kMinimumRadiusWithDigits) * kDigitOffsetPerPixel );
// Text is drawn with the fill color
CGContextSetRGBFillColor( inContext, 0, 0, 1, 1 );
for ( i = 12; i > 0; i-- )
{
// Draw the text
string = CFStringCreateWithFormat( NULL, NULL, CFSTR( "%d" ), i );
check( string );
verify_noerr( GetThemeTextDimensions( string, kThemeCurrentPortFont, kThemeStateActive, false, &dimensions, &baseline ) );
// Make the text rectangle centered around the text center point
digitBounds.SetAroundCenter( digitCenter.x, digitCenter.y, dimensions.h, dimensions.v );
qdBounds = digitBounds;
verify_noerr( DrawThemeTextBox( string, kThemeCurrentPortFont, kThemeStateActive, false, &qdBounds, teCenter, inContext ) );
CFRelease( string );
// Rotate to next position (counter-clockwise to make counting eaasier)
digitCenter = RotatePoint( digitCenter, center, -360.0/12 * kDegree );
}
SetPortTextFont( port, savedFont );
SetPortTextSize( port, savedSize );
}
//-----------------------------------------------------------------------------------
// DrawTime
//-----------------------------------------------------------------------------------
// Draws the hands on the clock (and the AM/PM display).
//
void TClockView::DrawTime(
CGContextRef inContext,
float inFrameShade )
{
TRect bounds = Bounds();
float radius;
HIPoint center, start, end;
CFGregorianDate time;
CFTimeZoneRef timezone;
float fractional;
RGBColor color;
CGMutablePathRef path;
bounds.Inset( kInnerFrameInset, kInnerFrameInset );
radius = MIN( bounds.Width(), bounds.Height() ) / 2;
center = bounds.Center();
// Get the time -- clocks aren't much use if they don't tell the time
timezone = CFTimeZoneCopySystem();
check( timezone != NULL );
time = CFAbsoluteTimeGetGregorianDate( CFAbsoluteTimeGetCurrent(), timezone );
CFRelease( timezone );
// The hour hand
// - the fractional calculation might seem confusing, but it makes the clock look
// better. It adds a bit of rotation depending on how much of the hour has gone
// by so that the hour hand doesn't just point directly at the current hour.
path = CGPathCreateMutable();
check( path );
start = CGPointMake( center.x, center.y - radius * kHourHandRatio );
end = CGPointMake( center.x, center.y + radius * kHourHandExtraRatio );
fractional = (int) ((360.0/12*time.hour) + (360.0/12)/60*time.minute);
RotateLine( &start, &end, &center, fractional * kDegree );
CGPathAddLine( path, &start, &end );
DrawShadowPath( inContext, path, kBaseHandWidth + radius * kHandWidthPerPixel, inFrameShade );
DrawPath( inContext, path, kBaseHandWidth + radius * kHandWidthPerPixel,
kHourColor.red, kHourColor.green, kHourColor.blue );
CFRelease( path );
// The minute hand
// - the fractional calculation here is the same as above, but for seconds so that
// the minute hand doesn't just point at the current minute and moves nice and
// smoothly.
path = CGPathCreateMutable();
check( path );
CGContextBeginPath( inContext );
start = CGPointMake( center.x, center.y - radius + kMinuteHandInset );
end = CGPointMake( center.x, center.y + kMinuteHandExtra );
fractional = (int) ((360.0/60*time.minute) + (360.0/60)/60*time.second);
RotateLine( &start, &end, &center, fractional * kDegree );
CGPathAddLine( path, &start, &end );
DrawShadowPath( inContext, path, 2, inFrameShade );
DrawPath( inContext, path, kBaseHandWidth + radius * kHandWidthPerPixel,
kMinuteColor.red, kMinuteColor.green, kMinuteColor.blue );
CFRelease( path );
// The second hand
path = CGPathCreateMutable();
check( path );
CGContextBeginPath( inContext );
start = CGPointMake( center.x, center.y - radius + kSecondHandInset );
end = CGPointMake( center.x, center.y + kSecondHandExtraRatio );
RotateLine( &start, &end, &center, 360.0/60 * ((int)time.second%60) * kDegree );
CGPathAddLine( path, &start, &end );
DrawShadowPath( inContext, path, 1, inFrameShade );
GetThemeBrushAsColor( kThemeBrushPrimaryHighlightColor, 32, true, &color );
DrawPath( inContext, path, 1, (float) color.red / 65536,
(float) color.green / 65536, (float) color.blue / 65536 );
CFRelease( path );
// A dot in the middle
if ( radius >= kMinimumRadiusWithDot )
{
CGContextAddArc( inContext, center.x, center.y, 3, 0, 360 * kDegree, 1 );
CGContextSetRGBFillColor( inContext, 0, 1, 0, 1 );
CGContextFillPath( inContext );
}
// Draw the AM/PM text -- don't if there isn't enough room
if ( radius >= kMinimumRadiusWithDigits )
{
CFStringRef string = ( time.hour < 12 ) ? CFSTR( "AM" ) : CFSTR( "PM" );
Rect qdBounds;
Point dimensions;
SInt16 baseline;
SInt16 just;
GrafPtr port;
SInt16 savedFont, savedSize;
float bestSize;
GetPort( &port );
savedFont = GetPortTextFont( port );
savedSize = GetPortTextSize( port );
SetPortTextFont( port, systemFont );
SetPortTextSize( port, kBaseDigitFontSize + ((int) radius - 50) / 6 );
bounds = Bounds();
verify_noerr( GetThemeTextDimensions( string, kThemeCurrentPortFont, kThemeStateActive, false, &dimensions, &baseline ) );
bestSize = MIN( bounds.Width(), bounds.Height() );
bounds.MoveBy( bounds.Width() / 2 - bestSize / 2, bounds.Height() / 2 - bestSize / 2 );
bounds.SetSize( bestSize, bestSize );
switch( kAMPMLocation )
{
case kAMPMLocTopLeft:
just = teFlushLeft;
break;
case kAMPMLocBotLeft:
bounds.MoveBy( 0, bounds.Height() - dimensions.v );
just = teFlushLeft;
break;
case kAMPMLocTopRight:
just = teFlushRight;
break;
case kAMPMLocBotRight:
bounds.MoveBy( 0, bounds.Height() - dimensions.v );
just = teFlushRight;
break;
}
qdBounds = bounds;
CGContextSetRGBFillColor( inContext, inFrameShade, inFrameShade, inFrameShade, 1 );
verify_noerr( DrawThemeTextBox( string, kThemeCurrentPortFont, kThemeStateActive, false, &qdBounds, just, inContext ) );
SetPortTextFont( port, savedFont );
SetPortTextSize( port, savedSize );
}
}
//-----------------------------------------------------------------------------------
// Draw
//-----------------------------------------------------------------------------------
// The fun part of the control
//
void TClockView::Draw(
RgnHandle inLimitRgn,
CGContextRef inContext )
{
#pragma unused( inLimitRgn )
float fillShade, frameShade;
// Draw the frame elements and face fill differently depending on
// the hilite state.
switch ( GetControlHilite( GetViewRef() ) )
{
case 1:
fillShade = 0.9;
frameShade = 0.4;
break;
case kControlNoPart:
default:
fillShade = 1;
frameShade = 0.5;
break;
}
DrawFace( inContext, frameShade, fillShade );
DrawTime( inContext, frameShade );
}
//-----------------------------------------------------------------------------------
// HitTest
//-----------------------------------------------------------------------------------
// Determine whether a click was in the control or not
//
ControlPartCode TClockView::HitTest(
const HIPoint& inWhere )
{
ControlPartCode part = kControlNoPart;
TRect bounds( Bounds() );
float radius;
HIPoint center;
float deltaX, deltaY;
// If it's in the control's bounds
if ( CGRectContainsPoint( bounds, inWhere ) )
{
// Add a check here to see if the AMPM was hit?
// Set up to calculate distance from center
radius = MIN( bounds.Width(), bounds.Height() ) / 2;
center = bounds.Center();
deltaX = inWhere.x - center.x;
deltaY = inWhere.y - center.y;
// If within the clock radius
if ( sqrt( deltaX * deltaX + deltaY * deltaY ) <= radius )
part = 1;
}
return part;
}
//-----------------------------------------------------------------------------------
// GetRegion
//-----------------------------------------------------------------------------------
//
OSStatus TClockView::GetRegion(
ControlPartCode inPart,
RgnHandle outRgn )
{
OSStatus err = noErr;
TRect bounds;
Rect qdBounds;
if ( inPart == kControlContentMetaPart
|| inPart == kControlStructureMetaPart
/* || inPart == kControlOpaqueRegionMetaPart */ )
{
bounds = Bounds();
qdBounds = bounds;
RectRgn( outRgn, &qdBounds );
}
return err;
}
//-----------------------------------------------------------------------------------
// RotatePoint
//-----------------------------------------------------------------------------------
// Rotate inPoint about inRotationCenter by inAngle radians
//
HIPoint RotatePoint(
HIPoint inPoint,
HIPoint inRotationCenter,
float inAngle ) // radians
{
HIPoint point;
CGAffineTransform transform;
// Move to origin
point.x = inPoint.x - inRotationCenter.x;
point.y = inPoint.y - inRotationCenter.y;
// Rotate
transform = CGAffineTransformMakeRotation( inAngle );
point = CGPointApplyAffineTransform( point, transform );
// Restore from origin
point.x += inRotationCenter.x;
point.y += inRotationCenter.y;
return point;
}
//-----------------------------------------------------------------------------------
// RotateLine
//-----------------------------------------------------------------------------------
// Rotate line segment from inStart to inEnd about inRotationCenter by inAngle
// radians
//
void RotateLine(
HIPoint* inStart,
HIPoint* inEnd,
const HIPoint* inRotationCenter,
float inAngle )
{
*inStart = RotatePoint( *inStart, *inRotationCenter, inAngle );
*inEnd = RotatePoint( *inEnd, *inRotationCenter, inAngle );
}
//-----------------------------------------------------------------------------------
// ClockAnimationTimer
//-----------------------------------------------------------------------------------
// This timer tells the clock it needs to update itself. It should be called once
// every second.
//
pascal void TClockView::ClockAnimationTimer(
EventLoopTimerRef inTimer,
void* inUserData )
{
#pragma unused( inTimer )
HIViewSetNeedsDisplay( (HIViewRef) inUserData, true );
}
//-----------------------------------------------------------------------------------
// DrawShadowPath
//-----------------------------------------------------------------------------------
// Strokes inPath in inContext with inLineWidth in RGB( inBaseGray, inBaseGray,
// inBaseGray ) with partial transparency
//
void DrawShadowPath(
CGContextRef inContext,
CGPathRef inPath,
float inLineWidth,
float inBaseGray )
{
CGContextSetLineWidth( inContext, inLineWidth );
CGContextSetRGBStrokeColor( inContext, inBaseGray, inBaseGray, inBaseGray, kShadowAlpha );
CGContextTranslateCTM( inContext, kShadowX, kShadowY );
CGContextBeginPath( inContext );
CGContextAddPath( inContext, inPath );
CGContextStrokePath( inContext );
CGContextTranslateCTM( inContext, -kShadowX, -kShadowY ); // restore the CTM
}
//-----------------------------------------------------------------------------------
// DrawPath
//-----------------------------------------------------------------------------------
// Strokes inPath in inContext with inLineWidth in RGB( inRed, inGreen, inBlue )
//
void DrawPath(
CGContextRef inContext,
CGPathRef inPath,
float inLineWidth,
float inRed,
float inGreen,
float inBlue )
{
CGContextSetLineWidth( inContext, inLineWidth );
CGContextBeginPath( inContext );
CGContextAddPath( inContext, inPath );
CGContextSetRGBStrokeColor( inContext, inRed, inGreen, inBlue, 1 );
CGContextStrokePath( inContext );
}
//-----------------------------------------------------------------------------------
// CGPathAddLine
//-----------------------------------------------------------------------------------
// Adds a line segment from inStart to inEnd to a CGPath
//
void CGPathAddLine(
CGMutablePathRef inPath,
const CGPoint* inStart,
const CGPoint* inEnd )
{
CGPathMoveToPoint( inPath, NULL, inStart->x, inStart->y );
CGPathAddLineToPoint( inPath, NULL, inEnd->x, inEnd->y );
}
</pre>
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