| ITSE 2317 Intermediate Java Controlling Opacity with a Slider Lecture # 07 Run: Sun Sep 12 20:27:27 CDT 2010 Baldwin Slides aa - Welcome to Intermediate Java ab - ITSE 2317 Intermediate Java ac - Controlling Opacity with a Slider ad - Figures ae - Listings af - Preview ag - Two approaches ah - The easiest way ai - The second approach aj - A better approach ak - Outside research al - Modification to the SimplePicture class am - Behavior of the program: an - Brief program specifications ao - Two output images ap - Move the thumb to the left aq - Move the thumb to the right ar - Define new classes as - General background information at - Storage of the image au - Image data formats av - No alpha data aw - Modification of the SimplePicture class ax - Modification of the SimplePicture class (cont'd) ay - Future Picture objects will accommodate alpha transparency az - No complete listing of SimplePicture provided ba - Discussion and sample code bb - The class named Prob07 bc - The main method bd - The main method (cont'd) be - When the constructor for the Prob07Runner class finishes executing bf - Waiting for an event bg - When an event is fired... bh - The class named Prob07Runner bi - Will explain in fragments bj - Beginning of the class named Prob07Runner bk - Class extends JFrame bl - When Listing 2 finishes executing... bm - The new Picture objects bn - A pair of working variables bo - Some GUI components bp - Beginning of the constructor bq - Straightforward code br - An issue of efficiency bs - Avoiding the inefficiency bt - Display the butterfly at 50-percent opacity bu - Put the constructor on hold bv - The setOpacity method bw - The setOpacity method (cont'd) bx - The returned reference by - A bitwise left-shift operation bz - A 24-bit left shift ca - A 24-bit left shift (cont'd) cb - Apply the opacityMask to the pixels cc - Draw the modified image on the beach scene cd - The drawPictureOnPicture method ce - The drawPictureOnPicture method (cont'd) cf - Return to the explanation of the constructor cg - The behavior from a big-picture viewpoint ch - Restore the background image ci - Draw a partially opaque butterfly image on the background cj - A more detailed view of the behavior ck - A series of events cl - The stateChanged method... cm - A new copy of the beach image cn - Draw the butterfly co - Repaint the image cp - The end of the program cq - Run the program cr - Summary cs - Complete program listing ct - End of slides |
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