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- ; > &.DocRISCOS.Hourglass
- ;
-
- The Hourglass module will change the pointer shape to that of an Hourglass.
- You can optionally also display a percentage figure and two "LED" indicators
- for status information.
-
- The Hourglass interface is via the following SWI's
-
- Hourglass_On &406C0
- ------------
- Entry:
- Exit:
-
- This turns on the Hourglass. Although control return immediately there is a
- delay of 1/3 of a second before the Hourglass becomes visible. Thus the client
- can bracket an operation by Hourglass_On/Hourglass_Off and the hourglass
- will only be displayed if the operation takes longer than 1/3 of a second.
- (For delays other than the default see Hourglass_Start).
-
- Hourglass_On's are nestable. If the Hourglass is already visible then a count
- is incremented and the Hourglass will remain visible until an equivalent
- number of Hourglass_Off's are done.
-
- Hourglass_Off &406C1
- -------------
- Entry:
- Exit:
-
- This will turn off the Hourglass, unless of course there are nested
- Hourglass_On calls in which case the Hourglass stays visible until
- an equal number of Hourglass_Off calls are made.
-
- When the Hourglass is removed the pointer number and colours are restored
- to those in use at the first Hourglass_On.
-
- Note that cursor shapes 3 and 4 are used (ie corrupted!) by the Hourglass,
- but users should not have been using these anyway.
-
- Hourglass_Smash &406C2
- ---------------
- Entry:
- Exit:
-
- Will turn off the Hourglass immediately taking no notice of nested
- Hourglass_On's. A last ditch call for when you are sure neither you,
- nor anyone else, should be displaying an Hourglass.
-
- Hourglass_Start &406C3
- ---------------
- Entry:
- R0 = Delay before startup in centi-seconds.
- Exit:
-
- Similar to Hourglass_On, except you can provide your own startup delay.
-
- A delay of zero can be used to suppress the Hourglass, so future
- Hourglass_On and Hourglass_Start calls have no effect. This only applies
- if the Hourglass is currently off. The condition is terminated by the
- matching Hourglass_Off, or by an Hourglass_Smash.
-
-
- Hourglass_Percentage &406C4
- --------------------
- Entry:
- R0 = (0-99) Percentage to display
- otherwise turn off Percentage
- Exit:
-
- The user can display a Percentage below the Hourglass. If in the
- range 0-99 it is displayed, values outside this range turn off the
- percentage.
-
- The initial condition of an Hourglass is to have Percentages turned off.
-
- Hourglass_LEDs &406C5
- --------------
- Entry:
- R0, R1 setup LEDs
- NewLEDs = (OldLEDs AND R1) XOR R0
- Exit:
- R0 = OldLEDs
-
- The are two display indicators above the Hourglass which can be used
- to display status information. These correspond to bits 0,1 of the
- LEDs word. Bit set indicates indicator on.
-
- The default condition is all indicators off.
-