CGPoint CGRectCenterPoint(CGRect rect)
{
CGPoint centerPoint = CGPointZero;
centerPoint.x = CGRectGetMidX(rect);
centerPoint.y = CGRectGetMidY(rect);
return centerPoint;
}
void drawRoundedRect(CGContextRef context, CGRect rrect)
{
// Drawing with a white stroke color
CGContextSetRGBStrokeColor(context, 0.3, 0.3, 0.3, 1.0);
CGContextSetRGBFillColor(context, 0.3, 0.3, 0.3, 1.0);
// Add Rect to the current path, then stroke it
// CGContextAddRect(context, CGRectMake(10.0, 190.0, 290.0, 73.0));
CGContextSetLineWidth(context, 1);
CGFloat radius = 10.0;
CGFloat minx = CGRectGetMinX(rrect), midx = CGRectGetMidX(rrect), maxx = CGRectGetMaxX(rrect);
CGFloat miny = CGRectGetMinY(rrect), midy = CGRectGetMidY(rrect), maxy = CGRectGetMaxY(rrect);
// Next, we will go around the rectangle in the order given by the figure below.
// minx midx maxx
// miny 2 3 4
// midy 1 9 5
// maxy 8 7 6
// Which gives us a coincident start and end point, which is incidental to this technique, but still doesn't
// form a closed path, so we still need to close the path to connect the ends correctly.
// Thus we start by moving to point 1, then adding arcs through each pair of points that follows.
// You could use a similar tecgnique to create any shape with rounded corners.
// Start at 1
CGContextMoveToPoint(context, minx, midy);
// Add an arc through 2 to 3
CGContextAddArcToPoint(context, minx, miny, midx, miny, radius);
// Add an arc through 4 to 5
CGContextAddArcToPoint(context, maxx, miny, maxx, midy, radius);
// Add an arc through 6 to 7
CGContextAddArcToPoint(context, maxx, maxy, midx, maxy, radius);
// Add an arc through 8 to 9
CGContextAddArcToPoint(context, minx, maxy, minx, midy, radius);
// Close the path
CGContextClosePath(context);
// Fill & stroke the path
CGContextDrawPath(context, kCGPathFillStroke);
CGContextSetRGBStrokeColor(context, 0.0, 0.0, 0.0, 0.0);
CGContextSetRGBFillColor(context, 1.0, 1.0, 1.0, 1.0);
CGContextMoveToPoint(context, minx, midy);
// Add an arc through 2 to 3
CGContextAddArcToPoint(context, minx, miny, midx, miny, radius);
// Add an arc through 4 to 5
CGContextAddArcToPoint(context, maxx, miny, maxx, midy, radius);
// Add an arc through 6 to 7
CGContextAddArcToPoint(context, maxx, maxy, midx, maxy, radius);
// Add an arc through 8 to 9
CGContextAddArcToPoint(context, minx, maxy, minx, midy, radius);
// Close the path
CGContextClosePath(context);
// Fill & stroke the path
CGContextDrawPath(context, kCGPathFillStroke);
}
void addRoundedRectToPath(CGContextRef context, CGRect rect, CGFloat radius) {
CGFloat minX = CGRectGetMinX(rect);
CGFloat minY = CGRectGetMinY(rect);
CGFloat maxX = CGRectGetMaxX(rect);
CGFloat maxY = CGRectGetMaxY(rect);
CGFloat midX = CGRectGetMidX(rect);
CGFloat midY = CGRectGetMidY(rect);
CGContextBeginPath(context);
CGContextMoveToPoint(context, maxX, midY);
CGContextAddArcToPoint(context, maxX, maxY, midX, maxY, radius);
CGContextAddArcToPoint(context, minX, maxY, minX, midY, radius);
CGContextAddArcToPoint(context, minX, minY, midX, minY, radius);
CGContextAddArcToPoint(context, maxX, minY, maxX, midY, radius);
CGContextClosePath(context);
}
//-----------------------------------------------------------------------------
void CGDrawContext::drawEllipse (const CRect &rect, const CDrawStyle drawStyle)
{
CGContextRef context = beginCGContext (true, currentState.drawMode.integralMode ());
if (context)
{
CGPathDrawingMode m;
switch (drawStyle)
{
case kDrawFilled : m = kCGPathFill; break;
case kDrawFilledAndStroked : m = kCGPathFillStroke; break;
default : m = kCGPathStroke; break;
}
applyLineStyle (context);
if (rect.width () != rect.height ())
{
CGContextSaveGState (context);
CGContextBeginPath (context);
CGRect cgRect = CGRectMake (rect.left, rect.top, rect.width (), rect.height ());
CGPoint center = CGPointMake (CGRectGetMidX (cgRect), CGRectGetMidY (cgRect));
CGFloat a = CGRectGetWidth (cgRect) / 2.;
CGFloat b = CGRectGetHeight (cgRect) / 2.;
CGContextTranslateCTM (context, center.x, center.y);
CGContextScaleCTM (context, a, b);
CGContextMoveToPoint (context, 1, 0);
CGContextAddArc (context, 0, 0, 1, radians (0), radians (360), 0);
CGContextClosePath (context);
CGContextRestoreGState (context);
CGContextDrawPath (context, m);
}
else
{
CGFloat radius = rect.width () * 0.5;
CGContextBeginPath (context);
CGContextAddArc (context, rect.left + radius, rect.top + radius, radius, radians (0), radians (360), 0);
CGContextClosePath (context);
CGContextDrawPath (context, m);
}
releaseCGContext (context);
}
}
static pascal OSStatus CustomSpotViewHandler(EventHandlerCallRef inCaller, EventRef inEvent, void* inRefcon)
{
OSStatus result = eventNotHandledErr;
CustomSpotViewData* myData = (CustomSpotViewData*)inRefcon;
switch (GetEventClass(inEvent))
{
case kEventClassHIObject:
switch (GetEventKind(inEvent))
{
case kEventHIObjectConstruct:
{
myData = (CustomSpotViewData*) calloc(1, sizeof(CustomSpotViewData));
GetEventParameter(inEvent, kEventParamHIObjectInstance, typeHIObjectRef, NULL, sizeof(myData->view), NULL, &myData->view);
result = SetEventParameter(inEvent, kEventParamHIObjectInstance, typeVoidPtr, sizeof(myData), &myData);
break;
}
case kEventHIObjectInitialize:
{
HIRect bounds;
GetEventParameter(inEvent, kEventParamBounds, typeHIRect, NULL, sizeof(bounds), NULL, &bounds);
myData->spot.x = CGRectGetMidX(bounds) - CGRectGetMinX(bounds);
myData->spot.y = CGRectGetMidY(bounds) - CGRectGetMinY(bounds);
HIViewSetVisible(myData->view, true);
break;
}
case kEventHIObjectDestruct:
{
free(myData);
result = noErr;
break;
}
default:
break;
}
break;
case kEventClassControl:
switch (GetEventKind(inEvent))
{
case kEventControlDraw:
{
CGContextRef context;
HIRect bounds;
result = GetEventParameter(inEvent, kEventParamCGContextRef, typeCGContextRef, NULL, sizeof(context), NULL, &context);
HIViewGetBounds(myData->view, &bounds);
if (!IsControlActive(myData->view))
{
CGContextSetGrayStrokeColor(context, 0.5, 0.3);
CGContextSetGrayFillColor(context, 0.5, 0.3);
}
else
{
CGContextSetRGBStrokeColor(context, 0.0, 0.0, 0.0, 0.7);
CGContextSetRGBFillColor(context, 0.0, 0.0, 0.0, 0.7);
}
CGContextSetLineWidth(context, 3.0);
CGContextStrokeRect(context, bounds);
HIRect spot = { {myData->spot.x - 4.0, myData->spot.y - 4.0}, {8.0, 8.0} };
CGContextFillRect(context, spot);
result = noErr;
break;
}
case kEventControlBoundsChanged:
{
HIRect newHIBounds;
GetEventParameter(inEvent, kEventParamCurrentBounds, typeHIRect, NULL, sizeof(newHIBounds), NULL, &newHIBounds);
myData->spot.x = CGRectGetMidX(newHIBounds) - CGRectGetMinX(newHIBounds);
myData->spot.y = CGRectGetMidY(newHIBounds) - CGRectGetMinY(newHIBounds);
break;
}
case kEventControlHitTest:
{
HIPoint pt;
HIRect bounds;
GetEventParameter(inEvent, kEventParamMouseLocation, typeHIPoint, NULL, sizeof(pt), NULL, &pt);
HIViewGetBounds(myData->view, &bounds);
ControlPartCode part = (CGRectContainsPoint(bounds, pt))?kControlButtonPart:kControlNoPart;
result = SetEventParameter(inEvent, kEventParamControlPart, typeControlPartCode, sizeof(part), &part);
break;
}
case kEventControlTrack:
{
Point qdPoint;
Rect qdWindowBounds;
HIPoint hiPoint;
HIRect hiViewBounds;
MouseTrackingResult mouseStatus = kMouseTrackingMouseDown;
HIViewGetBounds(myData->view, &hiViewBounds);
GetWindowBounds(GetControlOwner(myData->view), kWindowStructureRgn, &qdWindowBounds);
// handle the first mouseDown before moving
GetEventParameter(inEvent, kEventParamMouseLocation, typeHIPoint, NULL, sizeof(hiPoint), NULL, &hiPoint);
while (mouseStatus != kMouseTrackingMouseUp)
{
if (CGRectContainsPoint(hiViewBounds, hiPoint))
{
if (hiPoint.x < hiViewBounds.origin.x+4) hiPoint.x = hiViewBounds.origin.x+4;
if (hiPoint.x > hiViewBounds.origin.x+hiViewBounds.size.width-4) hiPoint.x = hiViewBounds.origin.x+hiViewBounds.size.width-4;
if (hiPoint.y < hiViewBounds.origin.y+4) hiPoint.y = hiViewBounds.origin.y+4;
if (hiPoint.y > hiViewBounds.origin.y+hiViewBounds.size.height-4) hiPoint.y = hiViewBounds.origin.y+hiViewBounds.size.height-4;
myData->spot = hiPoint;
HIViewSetNeedsDisplay(myData->view, true);
}
// a -1 GrafPtr to TrackMouseLocation yields global coordinates
TrackMouseLocation((GrafPtr)-1L, &qdPoint, &mouseStatus);
// convert to window-relative coordinates
hiPoint.x = qdPoint.h - qdWindowBounds.left;
hiPoint.y = qdPoint.v - qdWindowBounds.top;
// convert to view-relative coordinates
HIViewConvertPoint(&hiPoint, NULL, myData->view);
}
break;
}
default:
break;
}
break;
default:
break;
}
return result;
}
