Example: Bar Meter Limits
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10 ! *********************************************************************
20 ! Example: Bar/Meter/Limits
30 !
40 ! This program demonstrates the use of the BAR, METER, and LIMITS
50 ! widgets.
60 !
70 ! The program creates three widgets and sets them up and down through
80 ! their default range of 1 through 100. You can set the LOW LIMIT
90 ! and HIGH LIMIT thresholds on both the widgets using a pair of SLIDER
100 ! widgets. As the program passes through the thresholds, it changes
110 ! the color and string on a LABEL via use of events.
120 !
130 ! The program sets up the widgets, sets up events on the SLIDERS and
140 ! BAR (no event is set up on other widgets, since the method is the
150 ! same), and then goes through a loop from 1 to 100 and then back
160 ! down again, changing the widgets with each count.
170 !
180 ! A routine called "Lobound" handles the SLIDER that sets the lower
190 ! trip limit, a routine called "Hibound" that handles the LIMIT that
200 ! sets the higher trip limit, and a routine called "Trip" that handles
210 ! the BAR events.
220 !
230 ! Some features of this program are:
240 !
250 ! - The program will NOT allow you to set the HIGH LIMIT below the
260 ! LOW LIMIT, or the inverse. Try to scroll into these regions and
270 ! the slidebar will pop back.
280 !
290 ! - Normally a BAR event is "level sensitive": if you set an event
300 ! to happen on the "HIGH" ALARM RANGE, you get an event each and
310 ! every time you write a value to that range. For this program,
320 ! however, an event occurs only on transition between ALARM RANGEs.
330 !
340 ! *******************************************************************
350 !
360 ! Variables used:
370 !
380 ! N: Loop counter
390 ! Hibound: Stores METER HIGH LIMIT
400 ! Lobound: Stores METER LOW LIMIT
410 ! Sts: Used to RETURN items from widgets
420 !
430 INTEGER N,Hibound,Lobound,Sts
440 Hibound=100
450 Lobound=1
460 !
470 ! Define colors
480 !
490 INTEGER Black,White,Red,Yellow,Green,Cyan,Blue,Magenta
500 DATA 0,1,2,3,4,5,6,7
510 READ Black,White,Red,Yellow,Green,Cyan,Blue,Magenta
520 !
530 ! Declare variables for display handling
540 !
550 INTEGER D(1:4),Dw,Dh,Cursor
560 INTEGER Pw,Ph,Px,Py,Iw,Ih,Gx,Gy
570 INTEGER Mx,My,Mh,Mw,Brx,Bry,Brh,Brw
580 INTEGER Lmx,Lmy,Lmh,Lmw,Lx,Ly,Lh,Lw
590 INTEGER Lshx,Lshy,Lshw,Lshh,S2x,S2y,S2w,S2h
600 INTEGER Lslx,Lsly,Lslw,Lslh,Slx,Sly,Slw,Slh
610 !
620 ! Get display dimensions
630 !
640 GESCAPE CRT,3;D(*)
650 Dw=D(3)-D(1)
660 Dh=D(4)-D(2)
670 !
680 ! Set up PANEL dimensions, so that PANEL scales to display
690 !
700 Pw=Dw*.8 ! PANEL width
710 Ph=Dh*.9 ! PANEL height
720 Px=(Dw-Pw)/2 ! Center PANEL along width
730 Py=(Dh-Ph)/2 ! Center PANEL above DISP line
740 !
750 ! Build main PANEL
760 !
770 CLEAR SCREEN
780 !
790 ASSIGN @Main TO WIDGET "PANEL";SET ("VISIBLE":0)
800 CONTROL @Main;SET ("X":Px,"Y":Py,"WIDTH":Pw,"HEIGHT":Ph)
810 CONTROL @Main;SET ("MAXIMIZABLE":0,"RESIZABLE":0)
820 CONTROL @Main;SET ("TITLE":" Example: Bar Meter Limits")
830 CONTROL @Main;SET ("SYSTEM MENU":"Quit")
840 !
850 ! Get interior dimensions of PANEL
860 !
870 STATUS @Main;RETURN ("INSIDE WIDTH":Iw,"INSIDE HEIGHT":Ih)
880 !
890 ! Set up widget dimensions
900 !
910 Gx=Iw*.02 ! Gap between widgets
920 Gy=Gx
930 !
940 Mw=Iw*.45 ! METER parameters
950 Mh=Ih*.5
960 Mx=Gx
970 My=Gy
980 !
990 Brw=(Iw-(Mw+2*Gx))*.3 ! BAR parameters
1000 Brh=Mh
1010 Brx=Mx+Mw+Gx
1020 Bry=My
1030 !
1040 Lmw=Mw+Gy+Brw ! LIMITS parameters
1050 Lmh=Ih-(Mh+3*Gy)
1060 Lmx=Gx
1070 Lmy=My+Mh+Gy
1080 !
1090 Lw=Iw-(Mw+Brw+4*Gy) ! Indicator LABEL parameters
1100 Lh=Lw*.5
1110 Lx=Iw-(Lw+Gx)
1120 Ly=Gy
1130 !
1140 Lshw=(Lw-Gy)/2 ! High limit LABEL
1150 Lshh=Lshw*.4
1160 Lshx=Lx
1170 Lshy=Ly+Lh+Gy
1180 !
1190 Shw=Lshw ! High limit SLIDER
1200 Shh=(Ih-(4*Gy+Lh+Lshh))
1210 Shx=Lx
1220 Shy=Lshy+Lshh+Gy
1230 !
1240 Lslw=Lshw ! Low limit LABEL
1250 Lslh=Lshh
1260 Lslx=Lshx+Lshw+Gx
1270 Lsly=Lshy
1280 !
1290 Slw=Shw ! Low limit SLIDER
1300 Slh=Shh
1310 Slx=Lslx
1320 Sly=Shy
1330 !
1340 ! Build rest of PANEL
1350 !
1360 ! Create METER. (There is no need to set ALL these
1370 ! attributes, but this is an example program).
1380 !
1390 ! The three METER ranges are assigned as red, white and blue -
1400 ! an arbitrary choice.
1410 !
1420 ASSIGN @Meter TO WIDGET "METER";PARENT @Main
1430 CONTROL @Meter;SET ("X":Mx,"Y":My,"WIDTH":Mw,"HEIGHT":Mh)
1440 CONTROL @Meter;SET ("HIGH PEN":Red,"MIDDLE PEN":White,"LOW PEN":Blue)
1450 CONTROL @Meter;SET ("VALUE BACKGROUND":Yellow,"VALUE PEN":Black)
1460 CONTROL @Meter;SET ("LIMITS BACKGROUND":Blue,"LIMITS PEN":White)
1470 CONTROL @Meter;SET ("NEEDLE PEN":Blue,"METER BACKGROUND":Green)
1480 CONTROL @Meter;SET ("SWEEP ANGLE":175)
1490 !
1500 ! Create BAR. Basically the same, but not as many options.
1510 !
1520 ASSIGN @Bar TO WIDGET "BAR";PARENT @Main
1530 CONTROL @Bar;SET ("X":Brx,"Y":Bry,"WIDTH":Brw,"HEIGHT":Brh)
1540 CONTROL @Bar;SET ("HIGH PEN":Red,"MIDDLE PEN":White,"LOW PEN":Blue)
1550 !
1560 ! Create LIMITS
1570 !
1580 ASSIGN @Lim TO WIDGET "LIMITS";PARENT @Main
1590 CONTROL @Lim;SET ("X":Lmx,"Y":Lmy,"WIDTH":Lmw,"HEIGHT":Lmh)
1600 CONTROL @Lim;SET ("INSIDE PEN":White,"OUTSIDE PEN":Magenta)
1610 !
1620 ! Create LABEL to indicate METER range
1630 !
1640 ASSIGN @Label TO WIDGET "LABEL";PARENT @Main
1650 CONTROL @Label;SET ("X":Lx,"Y":Ly,"WIDTH":Lw,"HEIGHT":Lh)
1660 CONTROL @Label;SET ("BORDER":0,"BACKGROUND":White,"VALUE":"NORM")
1670 !
1680 ! Create LABEL for HIGH LIMIT SLIDER
1690 !
1700 ASSIGN @Lsh TO WIDGET "LABEL";PARENT @Main
1710 CONTROL @Lsh;SET ("X":Lshx,"Y":Lshy,"WIDTH":Lshw,"HEIGHT":Lshh)
1720 CONTROL @Lsh;SET ("VALUE":"High")
1730 !
1740 ! Create SLIDER to set HIGH LIMIT
1750 !
1760 ASSIGN @Sh TO WIDGET "SLIDER";PARENT @Main
1770 CONTROL @Sh;SET ("X":Shx,"Y":Shy,"WIDTH":Shw,"HEIGHT":Shh)
1780 CONTROL @Sh;SET ("DIRECT MOVE":1,"AUTO REPEAT":1)
1790 CONTROL @Sh;SET ("VALUE":100)
1800 !
1810 ! Create LABEL for LOW LIMIT SLIDER
1820 !
1830 ASSIGN @Lsl TO WIDGET "LABEL";PARENT @Main
1840 CONTROL @Lsl;SET ("X":Lslx,"Y":Lsly,"WIDTH":Lslw,"HEIGHT":Lslh)
1850 CONTROL @Lsl;SET ("VALUE":"Low")
1860 !
1870 ! Create SLIDER to set LOW LIMIT
1880 !
1890 ASSIGN @Sl TO WIDGET "SLIDER";PARENT @Main
1900 CONTROL @Sl;SET ("X":Slx,"Y":Sly,"WIDTH":Slw,"HEIGHT":Slh)
1910 CONTROL @Sl;SET ("DIRECT MOVE":1,"AUTO REPEAT":1)
1920 !
1930 ! Call bounds handlers to set up initial bounds, then
1940 ! make main PANEL visible. (The bounds handlers will
1950 ! both call the "Trip" routine to initialize the BAR event.)
1960 !
1970 GOSUB Hibound
1980 GOSUB Lobound
1990 CONTROL @Main;SET ("VISIBLE":1)
2000 !
2010 ! Set up the event handlers
2020 !
2030 N=1
2040 ON EVENT @Sl,"DONE" GOSUB Lobound ! Event for LOW LIMIT SLIDER
2050 ON EVENT @Sh,"DONE" GOSUB Hibound ! Event for HI LIMIT SLIDER
2060 ON EVENT @Bar,"ALARM" GOSUB Trip ! Event for BAR
2070 ON EVENT @Main,"SYSTEM MENU" GOTO Finis ! Event for QUIT toaster menu
2080 !
2090 ! Count from 1 to 100 and back down, and set METER and
2100 ! BAR as this is done.
2110 !
2120 LOOP
2130 FOR N=1 TO 100
2140 CONTROL @Meter;SET ("VALUE":N)
2150 CONTROL @Bar;SET ("VALUE":N)
2160 CONTROL @Lim;SET ("VALUE":N)
2170 NEXT N
2180 FOR N=100 TO 1 STEP -1
2190 CONTROL @Meter;SET ("VALUE":N)
2200 CONTROL @Bar;SET ("VALUE":N)
2210 CONTROL @Lim;SET ("VALUE":N)
2220 NEXT N
2230 END LOOP
2240 !
2250 ! ********************* End of Main Program ************************
2260 !
2270 ! Handler for LOW LIMIT SLIDER:
2280 !
2290 Lobound: !
2300 DISABLE
2310 STATUS @Sl;RETURN ("VALUE":Lobound) ! Get SLIDER VALUE
2320 IF Lobound>Hibound THEN ! If higher than HIGH LIMIT:
2330 Lobound=Hibound ! Make sure it is not
2340 CONTROL @Sl;SET ("VALUE":Lobound)
2350 END IF
2360 CONTROL @Meter;SET ("LOW LIMIT":Lobound) ! Set limit on widgets
2370 CONTROL @Bar;SET ("LOW LIMIT":Lobound)
2380 CONTROL @Lim;SET ("LOW LIMIT":Lobound)
2390 GOSUB Trip ! Adjust BAR event handling
2400 ENABLE
2410 RETURN
2420 !
2430 ! HIGH LIMIT SCROLL BAR event handler
2440 !
2450 Hibound: !
2460 DISABLE
2470 STATUS @Sh;RETURN ("VALUE":Hibound) ! Get SLIDER VALUE
2480 IF Hibound<Lobound THEN ! If HIGH LIMIT < LOW LIMIT:
2490 Hibound=Lobound ! Make sure it is not
2500 CONTROL @Sh;SET ("VALUE":Hibound)
2510 END IF
2520 CONTROL @Meter;SET ("HIGH LIMIT":Hibound) ! Reflect on METER & LIMITS
2530 CONTROL @Bar;SET ("HIGH LIMIT":Hibound)
2540 CONTROL @Lim;SET ("HIGH LIMIT":Hibound)
2550 GOSUB Trip ! Adjust event handling
2560 ENABLE
2570 RETURN
2580 !
2590 ! BAR event handler.
2600 ! You get the current value being sent to the BAR and determine
2610 ! the range it is in. Then, you set the event to occur on the
2620 ! adjoining range(s). This ensures that you only get an event when
2630 ! you transition between ranges.
2640 !
2650 ! As noted, the bounds handlers call Trip to adjust events. Since
2660 ! you are changing the HIGH & LOW LIMITs with the bounds handlers,
2670 ! you want to make sure that the events are rearranged accordingly.
2680 !
2690 Trip: !
2700 DISABLE
2710 SELECT N
2720 CASE <Lobound
2730 CONTROL @Bar;SET ("ALARM RANGES":"MIDDLE","ALARM TYPE":"EVENT")
2740 CONTROL @Label;SET ("BACKGROUND":Blue,"VALUE":"LOW")
2750 CASE <=Hibound
2760 CONTROL @Bar;SET ("ALARM RANGES":"LOW,HIGH","ALARM TYPE":"EVENT")
2770 CONTROL @Label;SET ("BACKGROUND":White,"VALUE":"NORM")
2780 CASE >Hibound
2790 CONTROL @Bar;SET ("ALARM RANGES":"MIDDLE","ALARM TYPE":"EVENT")
2800 CONTROL @Label;SET ("BACKGROUND":Red,"VALUE":"HIGH")
2810 END SELECT
2820 ENABLE
2830 RETURN
2840 !
2850 Finis: !
2860 ASSIGN @Main TO * ! Delete PANEL widget
2870 END
