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>> SPEAKER 1: Ejja issa jikteb programm
li b'xi mod jinteraġixxi ma ġurdien tiegħi.

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B'mod partikolari, ejja instantiate,
jew toħloq tieqa.

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U mbagħad ejja tisma ', biex ngħidu hekk,
f'dak tieqa għall klikks ġurdien.

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U hekk kif aħna jiskopru click mouse,
ejja jistampaw bil printf l-

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jikkoordina y x comma ta 'dak ġurdien
ikklikkja, relattivament għal dak tieqa.

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>> Here we go.

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Ejja ewwel jinkludu gevents.h, li hija
fajl header ieħor fil-Stanford

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librerija portabbli li tirrigwarda
għal avvenimenti grafika.

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Ejja jinkludu wkoll gwindow.h, li
fih il-funzjonijiet relatati mal-Windows.

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Ejja issa jiddikjara prinċipali
bil-mod normali.

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>> U ejja issa instantiate li tieqa.

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Gwindow -

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aħna ser sejħa hija tieqa -

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ugwali newGwindow.

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U jien ser tispeċifika kemmxejn arbitrarju a
wisa 'ta' 320 pixels u għoli ta '

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240 pixels.

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>> Issa għandna bżonn li tipproċedi biex jisimgħu
għal avvenimenti ġurdien, hekk li

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jitkellmu, f'dak tieqa.

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Issa avvenimenti jistgħu jinkludu clicks
jew drags jew movimenti.

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Iżda għal issa aħna ser tiffoka
biss fuq klikks.

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Jien ser intenzjonalment jinduċi
loop infinita ma tibni waqt,

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sempliċiment sabiex dan il-programm runs
dejjem, jew għall-inqas sakemm I ikklikkja l-

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X fil-kantuniera tal-lemin ta 'fuq.

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>> Biex tagħmel dan, ejja tagħmel waqt vera.

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U mbagħad ġewwa ta 'dan loop,
tikri ewwel kontroll għall-

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avveniment ġurdien kif ġej.

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Aħna ser jiddikjara GEvent, biex ngħidu hekk.

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>> Aħna ser sejħa-każ varjabbli.

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U aħna qed tmur biex jaħżnu f'dak l-
ritorn valur tal getNextEvent, li jgħaddi

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b'mod kostanti speċjali, li permezz
konvenzjoni huwa miktub fil-limiti kollha,

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imsejħa MOUSE_EVENT.

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Fi kliem ieħor, x'imkien f'din
Stanford librerija portabbli, hemm

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kostanti imsejħa MOUSE_CLICED.

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U hemm funzjoni definita li l-
imsejħa getNextEvent, li l-iskop fil-

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ħajja huwa li tagħmel eżattament dan.

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Isma għal, u mbagħad meta jisma waħda,
jirritorna l-avveniment li jmiss li l-

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ngħatat bidu minħabba mouse-utent.

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>> Issa ejja jivverifikaw jekk
F'dak il-każ huwa null.

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Għaliex mhuwiex null, u li hija aħna
xi ħaġa fil-fatt semgħu mill-

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ġurdien utent, aħna qed tmur biex tipproċedi
biex jiċċekkjaw issa liema tip

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ta 'każ li kien.

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Jekk getEventType, li jgħaddi avveniment
bħala argument, huwa daqs ugwali

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MOUSE_CLICKED, li jiġri li jkun
tip speċifiku ta 'avvenimenti, li huwa biss

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kostanti ieħor iddikjarat fil-
Stanford librerija portabbli.

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Issa kif imwiegħed, ejja issa jistampa l-
tikkoordina ta 'dik mouse click.

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Printf "% .0 f.

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>> Fi kliem ieħor, jien ser jistampaw
out valur b'punt li jvarja.

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Imma jien ma tridx tara xejn
wara l-punt deċimali.

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So I ser jispeċifikaw 0.0.

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Comma,% 0.0 f għall-y-jikkoordinaw
ukoll.

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Backslash n quote qrib.

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>> U issa ejja nikseb lx-jikkoordinaw
ta 'dak l-avveniment.

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Dan huwa l-x-jikkoordina
tal-click mouse.

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U mbagħad ejja nikseb y 'l-avveniment,
li hija l-y-jikkoordinaw

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tal-click mouse.

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>> Ejja issa jiffranka, tiġbor,
u run dan il-programm.

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U meta I do, għandu jkun il-każ
li l-ebda kwistjoni fejn I ikklikkja fi

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il-konfini ta 'dan 320 b'240 pixel
tieqa, I għandu mbagħad tara fuq tiegħi

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console tieqa l-y-koordinati x comma
ta 'fejn I għafast.

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Għamla click.

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. / Ikklikkja.

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U hemm li tieqa aħna mbassra.

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>> Issa let me ikklikkja bejn wieħed u ieħor fil-quċċata
rokna tax-xellug tat-tieqa.

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Fil console iskrin tiegħi, nara li I
jiġri li ikklikkja fuq x-jikkoordina sebgħa

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u y-jikkoordinaw sebgħa.

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Ejja issa ikklikkja bejn wieħed u ieħor fil-qiegħ
rokna tal-lemin tat-tieqa.

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U jien jidhru li għafast fuq
pixel jikkoordinaw 314, 229.

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>> Ejja issa jagħmlu l-rokna tax-xellug t'isfel.

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U nara 6, 233.

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U rokna lemin, 305, 4.

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>> Fi kliem ieħor, jidher li jkun il-każ
li r-rokna tax-xellug ta 'fuq ta'

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tieqa tagħna huwa 0, 0.

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U l-kantuniera tal-lemin t'isfel
ta 'tieqa tiegħi huwa 320, 240.

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Fi kliem ieħor, I raw
preċiżament dawk il-valuri, kellhom I biss

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perfettament allinjati mouse cursor tiegħi
f'kull wieħed minn dawk kantunieri.

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Dan huwa minnu b'mod ġenerali grafika
, programmazzjoni jekk tuża l-

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Stanford librerija portabbli jew aktar xi
oħra, fejn aħna jirrappreżentaw il-quċċata

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kantuniera bħala 0, 0, u l-qiegħ
rokna tal-lemin bħala l-virgola wisa

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għoli, jużaw numri pożittivi, anke
għalkemm huwa isfel u lejn il-lemin.

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