Professional GEM: Difference between revisions
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| − | + | {{Professional GEM}} |
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| − | PART - I. Windows .................................. 1 |
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| − | IN THE BEGINNING .................................. 1 |
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| − | windcreate()......................................... 1 |
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| − | windget()............................................ 1 |
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| − | OPEN SESAME! ..................................... 3 |
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| − | windopen()........................................... 3 |
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| − | windget()............................................ 3 |
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| − | windcalc()........................................... 3 |
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| − | windset()............................................ 3 |
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| − | CLEANING UP ...................................... 4 |
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| − | windclose().......................................... 4 |
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| − | winddelete()......................................... 4 |
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| − | THOSE FAT SLIDERS ................................. 4 |
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| − | windset()............................................ 5 |
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| − | windset()............................................ 5 |
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| − | windget()............................................ 5 |
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| − | COMING UP NEXT .................................... 6 |
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| − | FEEDBACK ........................................ 6 |
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| + | '''Professional GEM''' was a series of articles by [[Tim Oren]]. The articles {{--}} published by the [[ANTIC online]] magazine in 1985/86 {{--}} provide a good introduction in [[GEM]] programming. |
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| − | * [[Go to Professional GEM page 07 to 15]] |
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| − | PART - II. Windows ................................. 7 |
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| − | EXCELSIOR ....................................... 7 |
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| − | REDRAWING WINDOWS ................................ 7 |
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| − | CAVEAT EMPTOR .................................... 7 |
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| − | INTO THE BITS ..................................... 8 |
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| − | A SMALL CONFESSION ................................ 9 |
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| − | WINDOW CONTROL REQUESTS ........................... 10 |
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| − | windset()............................................ 10 |
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| − | rcconstrain()........................................ 10 |
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| − | align().............................................. 10 |
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| − | windset()............................................ 12 |
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| − | WINDOW SLIDER MESSAGES ............................ 12 |
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| − | windset.............................................. 12 |
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| − | A COMMON BUG ...................................... 13 |
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| − | DEPT. OF DIRTY TRICKS .............................. 14 |
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| − | windget()............................................ 14 |
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| − | windset()............................................ 14 |
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| − | A SIN OF OMISSION .................................. 15 |
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| − | COMING SOON ...................................... 15 |
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| − | |||
| − | * [[Go to Professional GEM page 16 to 23]] |
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| − | PART - III. THE DIALOG HANDLER ....................... 16 |
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| − | A MEANINGFUL DIALOG ............................... 16 |
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| − | DEFINING TERMS ................................... 16 |
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| − | rsrcload()........................................... 17 |
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| − | rsrcgaddr().......................................... 17 |
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| − | BUG ALERT! ....................................... 17 |
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| − | A HANDY TRICK ..................................... 19 |
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| − | CLEAN UP ......................................... 20 |
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| − | deselobj()........................................... 20 |
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| − | RECAP ........................................... 20 |
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| − | BUTTON BUTTON .................................... 20 |
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| − | selobj()............................................. 21 |
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| − | WHO'S GOT THE BUTTON? .............................. 21 |
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| − | selobj()............................................. 22 |
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| − | COMING UP NEXT .................................... 22 |
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| − | DISPELL GREMLINS ................................. 23 |
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| − | |||
| − | * [[Go to Professional GEM page 24 to 30]] |
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| − | PART - IV. Resource Structure ....................... 24 |
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| − | A MAZE OF TWISTY LITTLE PASSAGES. .................... 24 |
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| − | PUTTING IT TO WORK ................................. 28 |
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| − | LETTERS WE GET LETTERS ............................. 30 |
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| − | STRAW POLL! ...................................... 30 |
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| − | STAY TUNED! ...................................... 30 |
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| − | |||
| − | * [[Go to Professional GEM page 32 to 37]] |
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| − | PART - V. Resource Tree Structures ................... 32 |
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| − | HOW GEM DOES IT. ................................... 34 |
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| − | THOUGHT EXPERIMENTS .............................. 36 |
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| − | A TREEWALKER OF OUR OWN ............................. 37 |
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| − | |||
| − | * [[Go to Professional GEM page 39 to 48]] |
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| − | PART - VI. Raster operations ........................ 39 |
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| − | SEASONS GREETINGS ................................ 39 |
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| − | DEFINING TERMS ................................... 39 |
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| − | MONOCHROME VS. COLOR .............................. 39 |
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| − | STANDARD VS. DEVICE-SPECIFIC FORMAT ................ 40 |
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| − | EVEN-WORD VS. FRINGES ............................. 41 |
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| − | MFDB's .......................................... 41 |
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| − | LET'S OPERATE .................................... 42 |
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| − | TRANSFORM FORM ................................... 42 |
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| − | vrtrnfm()............................................ 42 |
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| − | COPY RASTER OPAQUE ................................ 43 |
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| − | vrocpyfm()........................................... 43 |
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| − | COPY RASTER TRANSPARENT ........................... 44 |
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| − | vrtcpyfm()........................................... 44 |
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| − | THE MODE PARAMETER ................................ 44 |
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| − | REPLACE MODE ..................................... 45 |
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| − | ERASE MODE ....................................... 45 |
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| − | XOR MODE ......................................... 45 |
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| − | TRANSPARENT MODE ................................. 45 |
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| − | REVERSE TRANSPARENT MODE .......................... 45 |
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| − | THE PROBLEM OF COLOR ............................... 45 |
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| − | OPTIMIZING RASTER OPERATIONS ...................... 46 |
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| − | AVOID MERGED COPIES ............................... 46 |
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| − | MOVE TO CORRESPONDING PIXELS ....................... 46 |
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| − | AVOID FRINGES .................................... 47 |
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| − | USE ANOTHER METHOD ................................ 47 |
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| − | FEEDBACK RESULTS ................................. 47 |
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| − | THE NEXT QUESTION ................................. 47 |
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| − | COMING UP SOON .................................... 48 |
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| − | |||
| − | * [[Go to Professional GEM page 49 to 56]] |
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| − | PART - VII. Menu Structures ......................... 49 |
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| − | HAPPY NEW YEAR .................................... 49 |
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| − | MENU BASICS ...................................... 49 |
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| − | MENU STRUCTURES .................................. 49 |
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| − | USING THE MENU .................................... 51 |
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| − | rsrcgaddr().......................................... 51 |
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| − | menubar()............................................ 51 |
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| − | menutnormal()........................................ 52 |
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| − | GETTING FANCY .................................... 52 |
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| − | menuienable()........................................ 52 |
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| − | setmenu()............................................ 53 |
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| − | CHECK PLEASE? .................................... 53 |
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| − | menuicheck()......................................... 53 |
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| − | NOW YOU SEE IT NOW YOU DON'T .......................... 53 |
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| − | menutext()........................................... 54 |
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| − | LUNCH AND DINNER MENUS ............................. 54 |
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| − | DO IT YOURSELF .................................... 54 |
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| − | MAKE PRETTY ...................................... 55 |
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| − | THAT'S IT FOR NOW! ................................. 56 |
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| − | |||
| − | * [[Go to Professional GEM page 57 to 66]] |
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| − | PART - VIII. USER INTERFACES ........................ 57 |
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| − | AND NOW FOR SOMETHING COMPLETELY DIFFERENT! .......... 57 |
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| − | CREDIT WHERE IT'S DUE .............................. 57 |
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| − | FINGERTIPS ...................................... 57 |
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| − | MUSCLES ......................................... 58 |
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| − | EYES ............................................ 59 |
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| − | SHORT-TERM MEMORY ................................ 60 |
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| − | CHUNKING ........................................ 60 |
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| − | THINK! .......................................... 61 |
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| − | ARE WE NOT MEN? .................................... 61 |
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| − | OF MODES AND BANDWIDTH ............................. 65 |
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| − | TO DO IS TO BE! ..................................... 66 |
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| − | AMEN... ......................................... 66 |
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| − | * [[Go to Professional GEM page 68 to 76]] |
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| − | PART - IX. VDI Graphics: Lines and Solids .............. 68 |
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| − | A BIT OF HISTORY ................................... 68 |
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| − | vswrmode()........................................... 69 |
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| − | vsclip()............................................. 69 |
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| − | THE LINE FORMS ON THE LEFT ........................... 70 |
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| − | vslcolor()........................................... 70 |
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| − | vslwidth()........................................... 70 |
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| − | vslends()............................................ 70 |
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| − | vsltype()............................................ 70 |
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| − | vsludsty()........................................... 71 |
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| − | vpline()............................................. 71 |
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| − | vrbox().............................................. 72 |
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| − | varc()............................................... 72 |
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| − | vellarc()............................................ 73 |
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| − | SOLIDS .......................................... 73 |
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| − | vsfcolor()........................................... 74 |
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| − | vsfperimeter()....................................... 74 |
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| − | vsfinterior()........................................ 74 |
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| − | vsfstyle()........................................... 74 |
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| − | vsfudpat()........................................... 75 |
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| − | vfillarea().......................................... 75 |
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| − | vrrecfl()............................................ 75 |
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| − | vcircle()............................................ 76 |
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| − | vellipse()........................................... 76 |
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| − | vpieslice().......................................... 76 |
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| − | vellpie()............................................ 76 |
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| − | vrfbox()............................................. 76 |
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| − | TO BE CONTINUED ................................... 76 |
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| − | * [[Go to Professional GEM page 77 to 114]] |
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| − | APPENDICES................................................. 77 |
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| − | Appendix - I Sample Code for Part II.................... 78 |
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| − | Appendix - II Sample Code for Part III.................. 83 |
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| − | Appendix - III Sample Code for Part IV.................. 88 |
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| − | Appendix - IV Sample Code for Part V.................... 98 |
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| − | Appendix - V Sample Code for Part VI.................... 103 |
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| − | Appendix - VI Sample Code for Part VII.................. 108 |
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| − | Appendix - VII Sample Code for Part IX.................. 112 |
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| − | Appendix - VIII Sample Code for Part X.................. 114 |
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Latest revision as of 15:57, 12 October 2011
Professional GEM was a series of articles by Tim Oren. The articles -- published by the ANTIC online magazine in 1985/86 -- provide a good introduction in GEM programming.