public override void MouseDown(NSEvent aEvent)
{
if (iEnabled)
{
// get current mouse position
iMouseDown = MouseLocation(aEvent.LocationInWindow);
UpdateState();
if (iMouseDown == EMouse.eLeft || iMouseDown == EMouse.eRight)
{
// send notification that "rotation" has started
if (EventStart != null)
{
EventStart(this, EventArgs.Empty);
}
// do a step now and then set a timer for repeat
DoStep();
// use a fixed delay of 0.25 for the first delay
this.PerformSelectorWithObjectAfterDelay(ObjectiveCRuntime.Selector("timerUpdate"), null, 0.25);
}
}
}
public void TimerUpdate()
{
if (iEnabled && (iMouseDown == EMouse.eLeft || iMouseDown == EMouse.eRight))
{
DoStep();
this.PerformSelectorWithObjectAfterDelay(ObjectiveCRuntime.Selector("timerUpdate"), null, iRepeatInterval);
}
}
public override void DrawRect(NSRect aRect)
{
// calculate the number of tick intervals since the hourglass was shown
NSDate dateNow = NSDate.DateWithTimeIntervalSinceNow(0);
double timeElapsed = dateNow.TimeIntervalSinceReferenceDate - iTimeShown;
int numIntervals = (int)(timeElapsed / 0.06);
// save graphics state for restoring later
NSGraphicsContext context = NSGraphicsContext.CurrentContext;
context.SaveGraphicsState();
// apply transforms to rotate the foreground image
NSImage bkgd = Properties.Resources.IconHourglass;
NSImage frgd = Properties.Resources.IconHourglass2;
NSAffineTransform xform1 = new NSAffineTransform();
xform1.TranslateXByYBy(Bounds.Width * 0.5f, Bounds.Height * 0.5f);
xform1.Concat();
NSAffineTransform xform2 = new NSAffineTransform();
xform2.RotateByDegrees(-45.0f * (numIntervals % 8));
xform2.Concat();
bool scale = Bounds.Width < frgd.Size.width || Bounds.Height < frgd.Size.height;
NSAffineTransform xform3 = null;
if (scale)
{
float scaleX = Bounds.Width / frgd.Size.width;
float scaleY = Bounds.Height / frgd.Size.height;
float ratio = scaleX > scaleY ? scaleX : scaleY;
xform3 = new NSAffineTransform();
xform3.ScaleBy(ratio);
xform3.Concat();
}
NSAffineTransform xform4 = new NSAffineTransform();
xform4.TranslateXByYBy(-frgd.Size.width * 0.5f, -frgd.Size.height * 0.5f);
xform4.Concat();
// draw background and foreground
bkgd.DrawAtPointFromRectOperationFraction(Bounds.origin, NSRect.NSZeroRect, NSCompositingOperation.NSCompositeSourceOver, 1.0f);
frgd.DrawAtPointFromRectOperationFraction(Bounds.origin, NSRect.NSZeroRect, NSCompositingOperation.NSCompositeSourceOver, 1.0f);
// clean up
xform1.Release();
xform2.Release();
if (scale)
{
xform3.Release();
}
xform4.Release();
context.RestoreGraphicsState();
// schedule another timer event
this.PerformSelectorWithObjectAfterDelay(ObjectiveCRuntime.Selector("timerUpdate"), null, 0.06);
}
public bool ValidateMenuItem(NSMenuItem aItem)
{
return(aItem.Action == ObjectiveCRuntime.Selector("deleteBookmark:") && ViewTable.ClickedRow >= 0);
}