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- /*********************************************************************
-
- EX3.PRG - CUA-Clip Library examples.
-
- This file contains sample code illustrating both the GET
- and Event systems working in combination.
-
- Author: Dave Rooney
- Date : Feb. 22, 1993
-
- *********************************************************************/
-
- #include "Demo.CH"
-
- //
- // Example 3 - Performing GET's while a real-time clock is displayed.
- //
-
- FUNCTION Combo_Examples
-
- LOCAL cScreen, ; // Screen behind the dialog box
- cOldColor, ; // Colour on entry
- bInterrupt, ; // Interrupt code block on entry
- GetList, ; // Local GetList array
- cPrinter, ; // Name of the printer
- nPort, ; // Printer port selected
- lPostScript, ; // .T. if the printer is PostScript
- aPrinters, ; // DBLIST array for the Printer lookup
- aPorts // Radio button array for the Printer port
-
- //
- // Initialize the variables...
- //
- cOldColor := SETCOLOR()
- GetList := {}
- cPrinter := SPACE(30)
- nPort := 1
- lPostScript := .F.
-
- //
- // Set an interrupt function to be called during wait states,
- // i.e. InterruptKey(). Note that we're saving the current
- // interrupt code block which we'll restore later.
- //
- bInterrupt := SetInterrupt( {|| MyInterrupt() } )
-
- //
- // Ensure Printer.DBF/.NTX are there. If not, make 'em!
- //
- IF !( FILE( "Printer.DBF" ) .AND. FILE( "Printer.NTX" ))
- _BuildPrinter()
- ENDIF
-
- //
- // Radio button array for the printer port...
- //
- aPorts := { { { 1, "LPT1" }, { 2, "LPT2" }, { 3, "LPT3" } } }
-
- //
- // List of available printers:
- //
- // Table Index Display Exp. Search Exp.
- // v v v v
- //
- aPrinters := { "Printer", "Printer",, {|| FIELD->PrnName },, {|x| UPPER(x) } }
-
- //
- // Open the printer file.
- //
- IF DBNetUse( .T., "DBFNTX", "Printer" )
- DBSETINDEX( "Printer" )
- ELSE
- SETCOLOR( cOldColor )
- RETURN NIL
- ENDIF
-
- //
- // Display the dialog box
- //
- cScreen := ShadowBox( 2, 12, 16, 68, 2, "GR+/B" )
-
- SETCOLOR( "W+/B" )
-
- @ 2,15 SAY "[ CUA-Clip Interface Library - GET System Examples ]"
- @ 15,14 SAY "Time:"
-
- SETCOLOR( "BG+/B" )
-
- @ 4,15 SAY " Printer:"
- @ 4,59 SAY "<F2>"
- @ 6,15 SAY " Port:"
- @ 8,15 SAY "PostScript:"
-
- //
- // Standard GET with a database list. Note the use of Monitor() to
- // refresh all of the GETs after a printer name has been entered.
- // This will change the colour of the radio buttons and check box
- // from dimmed to normal.
- //
- @ 4,27 GET cPrinter PICTURE "@!" ;
- VALID Printer->( DBSEEK( UPPER( cPrinter ), .F. )) .AND. Monitor() ;
- DBLIST aPrinters ;
- COLOR "W+/N, W+/R, W/N" ;
- MESSAGE "Enter the name of the printer"
-
- //
- // Radio buttons - nothing too fancy here!
- //
- @ 6,27 GET nPort USING RADIO WITH aPorts ;
- WHEN !EMPTY( cPrinter ) ;
- VALID ( nPort > 0 ) ;
- COLOR "W+/B, W+/R, W/B" ;
- MESSAGE "Select the port for the printer"
-
- //
- // Check box - piece of cake!
- //
- @ 8,27 GET lPostScript USING CHECK ;
- WHEN !EMPTY( cPrinter ) ;
- COLOR "W+/B, W+/R, W/B" ;
- MESSAGE "Is it a PostScript printer?"
-
- //
- // Push buttons - code 'em in your sleep! Note that the ACTION expression
- // returns a logical value: .T. means end the READ, .F. means continue.
- //
- @ 10,25 BUTTON " ~Save " ;
- WHEN Updated() ;
- ACTION .T. ;
- COLOR "W+/BG, W+/R, N/BG, R/BG, N/BG"
-
- @ 10,43 BUTTON " ~Abort " ;
- ACTION .T. ;
- COLOR "W+/BG, W+/R, N/BG, R/BG, N/BG"
-
- READ
-
- //
- // Get rid of the dialog box...
- //
- KillBox( cScreen )
-
- //
- // Close the printer file...
- //
- DBNetClose( "Printer" )
-
- //
- // Reset the interrupt code block.
- //
- SetInterrupt( bInterrupt )
-
- SETCOLOR( cOldColor )
-
- RETURN NIL
- //
- // That's all folks!
- //
-
-
- /*******************************************************************
-
- FUNCTION MyInterrupt
-
- This is our background function that will be called during the
- InterruptKey wait state.
-
- NOTE: You must remember that this function will be called many times!
- As such its processing must be kept to a minimum. In this case
- we will only redisplay the time if it has changed.
-
- Parameters: None.
-
- Returns: NIL
-
- *******************************************************************/
-
- STATIC FUNCTION MyInterrupt
-
- STATIC cOldTime
-
- LOCAL cOldColor, ; // Colour on entry
- cCurTime, ; // Current time
- nRow, nCol // Position on entry
-
- IF cOldTime == NIL
- cOldTime := TIME()
- ENDIF
-
- cCurTime := TIME()
-
- IF !( cCurTime == cOldTime )
- cOldColor := SETCOLOR( "W+/B" )
- nRow := ROW()
- nCol := COL()
-
- @ 15,20 SAY cCurTime
-
- cOldTime := cCurTime
-
- SETPOS( nRow, nCol )
- SETCOLOR( cOldColor )
- ENDIF
-
- RETURN NIL
- //
- // EOP: MyInterrupt
- //
-