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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hello,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>B= map bitAnd: 7.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>M= map bitShift: -3.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>All the best,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Ron Teitelbaum<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> squeak-dev-bounces@lists.squeakfoundation.org [mailto:squeak-dev-bounces@lists.squeakfoundation.org] <b>On Behalf Of </b>gettimothy<br><b>Sent:</b> Tuesday, February 11, 2014 9:06 PM<br><b>To:</b> The general-purpose Squeak developers list<br><b>Subject:</b> [squeak-dev] for the operation MAP := B bitOr:( M bitShift:3) given MAP how do I derive B and M?<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>To reverse a MorphicEvent into an primitive event I need to unmap the buttons and modifiers.<br>In a primitive event, the fifth element (buttons) can be 1,2 or 4 and the sixth element (modifiers) 1,2,4 or 8.<br><br>HandMorph >> generateMouseEvent combines them into one field as such:<br><br><o:p></o:p></span></p><div><p class=MsoNormal style='background:whitesmoke'><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> buttons := evtBuf fifth.<br> modifiers := evtBuf sixth.<br> buttons := buttons bitOr: (modifiers bitShift: 3).<o:p></o:p></span></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><br>I need to reverse that "buttons bitOr: (modifiers bitShift: 3)" back into the original values to recreate the primitive event.<br>Here are the possible values of B(uttons) and M(odifiers) under that operation:<br><br><br><b><u>B M MAP</u></b><br>1 bitOr:(1 bitShift:3 ) 9<br>1 bitOr:(2 bitShift:3 ) 17<br>1 bitOr:(4 bitShift:3 ) 33<br>1 bitOr:(8 bitShift:3 ) 65<br><br><br>2 bitOr:(1 bitShift:3 ) 10<br>2 bitOr:(2 bitShift:3 ) 18<br>2 bitOr:(4 bitShift:3 ) 34<br>2 bitOr:(8 bitShift:3 ) 66<br><br><br>4 bitOr:(1 bitShift:3 ) 12<br>4 bitOr:(2 bitShift:3 ) 20<br>4 bitOr:(4 bitShift:3 ) 36<br>4 bitOr:(8 bitShift:3 ) 68<br><br>So, given a MAP on the right, I need to derive a B and a M.<br><br>I can figure something out, but it will probably be ugly. Hence, this email to the list.<br>Any bit-fiddlers on the board who know an elegant method?<br><br>thx.<br><br>tty.<o:p></o:p></span></p></div></div></div></body></html>