Download Mastering Perl/Tk by Stephen Lidie, Nancy Walsh PDF

By Stephen Lidie, Nancy Walsh

Perl/Tk, the wedding of Perl with the Tk toolkit, enables you to construct Perl courses with an enticing, intuitive GUI interface. Mastering Perl/Tk is the single and in simple terms e-book you wish for studying Perl/Tk and for getting to know the ideas of skilled Perl/Tk programmers. the 1st half the booklet includes the fundamentals on tips on how to use Perl/Tk, with insurance of all of the usual widgets and a radical instructional of the geometry managers. Mastering Perl/Tk then branches out into complex functions, together with large application examples. the result's a booklet available for beginners, and precious for skilled programmers able to examine the next move within the dependent and potent use of Perl/Tk. Nancy Walsh is the writer of Learning Perl/Tk and Steve Lidie is the writer of the Perl/Tk Pocket Reference and a chain of Perl/Tk articles within the Perl magazine. jointly, they've got written Mastering Perl/Tk to be the definitive advisor to Perl/Tk.

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D ,y Der Record-Typ Registers ist im TurboPascal-Unit Dos definiert. Die Bedeutung seiner Elemente können Sie im Programmierhandbuch von TurboPascal nachlesen. 4 Anforderung einer EMS-Seite 46 Fordert eine oder mehrere EMS-Seiten über einen EMS-Aufruf an (reserviert diese und macht sie benutzbar). Die angeforderte Seite erhält eine Identifikationsnummer, das sogenannte Handle (EMSHandle). Die Seiten müssen unbedingt mit EMSClose wieder geschlossen werden. en h m zweI versc e ene EMS-Bereiche ablegen möc ten.

UNIT EMS; INTERFACE USES Dos,ert; TYPE String4 = STRING [4]; VAR EMSResult: EMSSegment: EMSTatal: EMSFrei: EMSHandle: EMSVersiansNr: Ward; Ward; Ward; Ward; Ward; String4; { { { { { { EMS-Fehlercade } EMS-Segment } Gesamtzahl der EMS-seiten je 16k freie EMS-seiten je 16k } EMS-Handle } Versians-Nr. des EMS-Treibers FUNCTION EMSInstalled: Baalean; PROCEOURE EMSAdresse (VAR EMSSegment: Ward; VAR EMSResult: Ward); PROCEOURE EMSAvail (VAR EMSTatal: Ward; VAR EMSFrei: Ward; VAR EMSResult: Ward); PROCEOURE EMSOpen (EMSAnzahl: Ward; VAR EMSHandle: Ward; VAR EMSResult: Ward); PROCEOURE EMSMap (EMSHandle: Ward; EMSLagPage: Ward; EMSPhysPage: Ward; VAR EMSResult: Ward); PROCEOURE EMSClase (EMSHandle: Ward; VAR EMSResult: Ward); PROCEOURE EMSVersian (VAR EMSVersiansNr: String4; VAR EMSResult: Ward ); 43 ...

Die Variable VideoModus ist eine private Variable vom Typ (GraphikModus,TextModus), die in den Anwendungen zur bequemen Unterstützung, welcher Modus gerade aktiv ist, verwendet werden kann. Für das Setzen der Farbpalette muß die Variable PaletteGraphik, zum Beispiel als typisierte Konstante, vorbesetzt werden. 3). Die Prozedur SetViewPort sorgt dafür, daß keine Graphikaktionen außerhalb der gewählten Auflösung, also außerhalb des Bildschirmes, möglich sind. Mit anderen Worten, es setzt das Graphikfenster von links oben bis rechts unten und schneidet alle Graphiken am Rande ab (ClipOn).

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