34,333
edits
Changes
m
Text replacement - "<google>ADSDAQBOX_FLOW</google>" to "<htmlet>adsdaqbox_flow</htmlet>"
== Points, Coordinates and Pixels ==
<googlehtmlet>ADSDAQBOX_FLOWadsdaqbox_flow</googlehtmlet>
The Quartz 2D API functions work on the basis of points. These are essentially the x and y coordinates of a two dimensional coordinate system on the device screen with 0, 0 representing the top left hand corner of the display. These coordinates are stored in the form of CGFloat variables.