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NAME
AslRequest -- get input from user using an ASL requester. (V36)
AslRequestTags -- varargs stub for AslRequest(). (V36)
SYNOPSIS
result = AslRequest(requester,tags);
D0 A0 A1
bool aslrequest(aptr,struct tagitem *);
result = AslRequestTags(requester,firstTag,...);
bool aslrequesttags(aptr,tag,...);
FUNCTION
Prompts the user for input, based on the specific type of
requester and modifying tags. The actions and results
are specific to the type of requester, but in general the action is
to open a requesting window prompting the user for a specific input.
If the user cancels or the system aborts the request, FALSE
is returned, otherwise the requester's data structure reflects the
user input.
Note that tag values stay in effect for each use of the
requester until they are cleared or modified by passing the
same tag with a new value.
INPUTS
requester - requester structure allocated with allocaslrequest(). if
this parameter is NULL, this function will always return
FALSE with a dos.library/ioerr() result of
ERROR_NO_FREE_STORE.
tags - pointer to an optional tag list which may be used to
control features of the requester.
TAGS
Tags for use with the file requester:
ASLFR_Window (struct window *) - parent window of requester. if no
ASLFR_Screen tag is specified, the window structure
is used to determine on which screen to open the
requesting window. (V36)
ASLFR_PubScreenName (STRPTR) - Name of a public screen to open on.
This overrides the screen used by ASLFR_Window. (V38)
ASLFR_Screen (struct screen *) - screen on which to open the requester.
This overrides the screen used by ASLFR_Window or by
ASLFR_PubScreenName. (V38)
ASLFR_PrivateIDCMP (BOOL) - When set to TRUE, this tells ASL to
allocate a new IDCMP port for the requesting window.
If not specified or set to FALSE, and if ASLFR_Window
is provided, the requesting window will share
ASLFR_Window's IDCMP port. (V38)
ASLFR_IntuiMsgFunc (struct hook *) - a function to call whenever an
unknown Intuition message arrives at the message port
being used by the requesting window. The function
receives the following parameters:
A0 - (struct hook *)
A1 - (struct intuimessage *)
A2 - (struct filerequester *)
(V38)
ASLFR_SleepWindow (BOOL) - When set to TRUE, this tag will cause the
window specified by ASLFR_Window to be "put to
sleep". That is, a busy pointer will be displayed in
the parent window, and no gadget or menu activity will
be allowed. This is done by opening an invisible
Intuition requester in the parent window. (v38)
ASLFR_UserData (APTR) - A 32-bit value that is simply copied in the
fr_UserData field of the requester structure. (V38)
ASLFR_TextAttr (struct textattr *) - font to be used for the requesting
window's gadgets and menus. If this tag is not provided
or its value is NULL, the default font of the screen
on which the requesting window opens will be used.
This font must already be in memory as ASL calls
openfont() and not opendiskfont(). as of v38, the font
used in the file requester's file list must be
monospaced. If the font provided with this tag is
not monospaced, then the file list will use the current
system default font as chosen in preferences. (V38)
ASLFR_Locale (struct locale *) - locale to use for the requesting
window. This determines the language used for the
requester's gadgets and menus. If this tag is not
provided or its value is NULL, the system's current
default locale will be used. As of V38, items such as
the date format always uses the system default locale.
(V38)
ASLFR_TitleText (STRPTR) - Title to use for the requesting window.
Default is no title. (V36)
ASLFR_PositiveText (STRPTR) - Label of the positive gadget in the
requester. English default is "OK". Prior to V38, this
string could not be longer than 6 characters. (V36)
ASLFR_NegativeText (STRPTR) - Label of the negative gadget in the
requester. English default is "Cancel". Prior to V38,
this string could not be longer than 6 characters.
(V36)
ASLFR_InitialLeftEdge (WORD) - Suggested left edge of requesting
window. (V36)
ASLFR_InitialTopEdge (WORD) - Suggested top edge of requesting
window. (V36)
ASLFR_InitialWidth (WORD) - Suggested width of requesting window. (V36)
ASLFR_InitialHeight (WORD) - Suggested height of requesting window.
(V36)
ASLFR_InitialFile (STRPTR) - Initial contents of the file requester's
File text gadget. Default is empty. (V36)
ASLFR_InitialDrawer (STRPTR) - Initial contents of the file
requester's Drawer text gadget. Default is empty. (V36)
ASLFR_InitialPattern (STRPTR) - Initial contents of the file
requester's Pattern text gadget. Default is #?. (V36)
ASLFR_InitialShowVolumes (BOOL) - When opening the file requester,
read the list of active volumes, do not read the contents
of the specified drawer. (V44)
ASLFR_Flags1 (ULONG) - Bulk initialization of many of the requester's
options. See <libraries/asl.h> for the possible
flag values. Default is 0. (V36)
ASLFR_Flags2 (ULONG) - Bulk initialization of many of the requester's
options. See <libraries/asl.h> for the possible
flag values. Default is 0. (V36)
ASLFR_DoSaveMode (BOOL) - Set this tag to TRUE when the file requester
is being used for saving. Default is FALSE. (V38)
ASLFR_DoMultiSelect (BOOL) - Set this tag to TRUE to let the user
select multiple files at once. This tag excludes
save mode. Default is FALSE. (V38)
ASLFR_DoPatterns (BOOL) - Set this tag to TRUE to cause a pattern
gadget to be displayed. Default is FALSE. (V38)
ASLFR_DrawersOnly (BOOL) - Set this tag to TRUE to cause the requester
to only display drawers, and have no File gadget. This
is useful to let the user choose a destination
directory. Default is FALSE. (V38)
ASLFR_FilterFunc (struct hook *) - a function to call for each file
encountered. If the function returns TRUE, the file is
included in the file list, otherwise it is rejected
and not displayed. The function receives the following
parameters:
A0 - (struct hook *)
A1 - (struct anchorpath *)
A2 - (struct filerequester *)
(V38)
ASLFR_RejectIcons (BOOL) - Set this tag to TRUE to cause the requester
not to display Workbench icons. This flag should
normally be set. Default is FALSE. (V38)
ASLFR_RejectPattern (UBYTE *) - Specifies an AmigaDOS pattern that is
used to reject files. That is, any files with names
matching this pattern are not included in the file
list. Note that the pattern must have been
parsed by dos.library/parsepatternnocase(). default
is ~(#?) which matches nothing. (V38)
ASLFR_AcceptPattern (UBYTE *) - Specifies an AmigaDOS pattern that is
used to accept files. That is, only files with names
matching this pattern are included in the file list.
Note that the pattern must have been parsed by
dos.library/parsepatternnocase(). default is #? which
matches everything. (V38)
ASLFR_FilterDrawers (BOOL) - Set this tag to TRUE if you want the
ASLFR_RejectPattern, ASLFR_AcceptPattern, and the
Pattern text gadget to also apply to drawer names.
Normally, drawers are always displayed. Default is
FALSE. (V38)
ASLFR_HookFunc (APTR) - A function that is called if the
FRF_FILTERFUNC or FRF_INTUIFUNC flags are specified in
the ASLFR_Flags1 tag. The function will be called like
so, with the arguments on the stack using the standard
C pushing order:
ULONG function(ULONG mask, aptr object,
struct filerequester *fr)
The Mask value is a copy of the specific ASLFR_Flags1
value the callback is for, either FRF_FILTERFUNC or
FRF_INTUIFUNC; object is a pointer to a data object
(a (struct intuimessage *) for frf_intuifunc, and a
(struct anchorpath *) for frf_filterfunc).
For FRF_FILTERFUNC, the function should return 0 if the
file should be added to the list, non-zero if it
shouldn't. For FRF_INTUIFUNC, the function should
return the original (struct intuimessage *) it was
passed.
ASLFR_SetSortBy (ULONG) -- Criteria for sorting the file list.
this must be one of ASLFRSORTBY_Name (sort by name),
ASLFRSORTBY_Date (sort by date) or ASLFRSORTBY_Size
(sort by size).
Default is ASLFRSORTBY_Name. (V44)
ASLFR_GetSortBy (ULONG *) -- Before leaving AslRequest(), the
file requester will store its current sort criteria
(ASLFRSORTBY_Name, ASLFRSORTBY_Date or ASLFRSORTBY_Size)
in the ULONG pointed to by this tag.
Default is NULL, i.e. no data is stored. (V44)
ASLFR_SetSortDrawers (ULONG) -- Determines where drawers
are placed in the sorted list; this must be one of
ASLFRSORTDRAWERS_First (drawers appear before all
other files), ASLFRSORTDRAWERS_Mix (drawers are sorted
along with the the other files) or ASLFRSORTDRAWERS_Last
(drawers appear after all other files).
Default is ASLFRSORTDRAWERS_First. (V44)
ASLFR_GetSortDrawers (ULONG *) -- Before leaving AslRequest(),
the file requester will store its current drawer list
placement (ASLFRSORTDRAWERS_First, ASLFRSORTDRAWERS_Mix
or ASLFRSORTDRAWERS_Last) in the ULONG pointed to by
this tag.
Default is NULL, i.e. no data is stored. (V44)
ASLFR_SetSortOrder (ULONG) -- Selects the order in which
the list is sorted; this must be one of ASLFRSORTORDER_Ascend
(smallest/oldest files first, largest/newest files last)
or ASLFRSORTORDER_Descend (largest/newest files first,
smallest/oldest files last).
Default is ASLFRSORTORDER_Ascend. (V44)
ASLFR_GetSortOrder (ULONG *) -- Before leaving AslRequest(),
the file requester will store its current sort order
(ASLFRSORTORDER_Ascend, ASLFRSORTORDER_Descend) in the
ULONG pointed to by this tag.
Default is NULL, i.e. no data is stored. (V44)
ASLFR_PopToFront (BOOL) -- When set to TRUE, this tells ASL to
bring the screen to the front the requester has opened on.
The position of the screen will be adjusted, too, to bring
the area into view the window has opened in. The screen
brought to the front will be pushed into the background
again when the requester window closes.
Default is TRUE. (V44)
Tags used for the font requester:
ASLFO_Window (struct window *) - parent window of requester. if no
ASLFO_Screen tag is specified, the window structure
is used to determine on which screen to open the
requesting window. (V36)
ASLFO_PubScreenName (STRPTR) - Name of a public screen to open on.
This overrides the screen used by ASLFO_Window. (V38)
ASLFO_Screen (struct screen *) - screen on which to open the requester.
This overrides the screen used by ASLFO_Window or by
ASLFO_PubScreenName. (V38)
ASLFO_PrivateIDCMP (BOOL) - When set to TRUE, this tells ASL to
allocate a new IDCMP port for the requesting window.
If not specified or set to FALSE, and if ASLFO_Window
is provided, the requesting window will share
ASLFO_Window's IDCMP port. (V38)
ASLFO_IntuiMsgFunc (struct hook *) - a function to call whenever an
unknown Intuition message arrives at the message port
being used by the requesting window. The function
receives the following parameters:
A0 - (struct hook *)
A1 - (struct intuimessage *)
A2 - (struct fontrequester *)
(V38)
ASLFO_SleepWindow (BOOL) - When set to TRUE, this tag will cause the
window specified by ASLFO_Window to be "put to
sleep". That is, a busy pointer will be displayed in
the parent window, and no gadget or menu activity will
be allowed. This is done by opening an invisible
Intuition requester in the parent window. (v38)
ASLFO_UserData (APTR) - A 32-bit value that is simply copied in the
fo_UserData field of the requester structure. (V38)
ASLFO_TextAttr (struct textattr *) - font to be used for the requesting
window's gadgets and menus. If this tag is not provided
or its value is NULL, the default font of the screen
on which the requesting window opens will be used.
This font must already be in memory as ASL calls
openfont() and not opendiskfont().
(V38)
ASLFO_Locale (struct locale *) - locale to use for the requesting
window. This determines the language used for the
requester's gadgets and menus. If this tag is not
provided or its value is NULL, the system's current
default locale will be used. (V38)
ASLFO_TitleText (STRPTR) - Title to use for the requesting window.
Default is no title. (V36)
ASLFO_PositiveText (STRPTR) - Label of the positive gadget in the
requester. English default is "OK". Prior to V38, this
string could not be longer than 6 characters. (V36)
ASLFO_NegativeText (STRPTR) - Label of the negative gadget in the
requester. English default is "Cancel". Prior to V38,
this string could not be longer than 6 characters.
(V36)
ASLFO_InitialLeftEdge (WORD) - Suggested left edge of requesting
window. (V36)
ASLFO_InitialTopEdge (WORD) - Suggested top edge of requesting
window. (V36)
ASLFO_InitialWidth (WORD) - Suggested width of requesting window. (V38)
ASLFO_InitialHeight (WORD) - Suggested height of requesting window.
(V38)
ASLFO_InitialName (STRPTR) - Initial contents of the font requester's
Name text gadget. Default is none. (V36)
ASLFO_InitialSize (UWORD) - Initial contents of the font requester's
Size numeric gadget (fo_Attr.ta_YSize). Default is 8.
(V36)
ASLFO_InitialStyle (UBYTE) - Initial setting of the font requester's
Style gadget (fo_Attr.ta_Style). Default is FS_NORMAL.
(V36)
ASLFO_InitialFlags (UBYTE) - Initial setting of the font requester's
fo_Flags field (fo_Attr.ta_Flags). Default is
FPF_ROMFONT. (V36)
ASLFO_InitialFrontPen (UBYTE) - Initial setting of the font requester's
Front Color gadget (fo_FrontPen). This value also
determines the color used to render the text in the
sample font area. Default is 1. (V36)
ASLFO_InitialBackPen (UBYTE) - Initial setting of the font requester's
Back Color gadget (fo_BackPen). This value also
determines the color used to render the background of
the sample font area. Default is 0. (V36)
ASLFO_InitialDrawMode (UBYTE) - Initial setting of the font
requester's Mode gadget (fo_DrawMode). Default is
JAM1. (V38)
ASLFO_Flags (ULONG) - Bulk initialization of many of the requester's
options. See <libraries/asl.h> for the possible
flag values. Default is 0. (V36)
ASLFO_DoFrontPen (BOOL) - Set this tag to TRUE to cause the requester
to display the Front Color selection gadget. Default is
FALSE. (V38)
ASLFO_DoBackPen (BOOL) - Set this tag to TRUE to cause the requester
to display the Back Color selection gadget. Default
is FALSE. (V38)
ASLFO_DoStyle (BOOL) - Set this tag to TRUE to cause the requester
to display the Style checkboxes. Default is FALSE.
(V38)
ASLFO_DoDrawMode (BOOL) - Set this tag to TRUE to cause the requester
to display the Mode cycle gadget. Default is FALSE.
(V38)
ASLFO_FixedWidthOnly (BOOL) - Set this tag to TRUE to cause the
requester to only display fixed-width fonts. Default
is FALSE. (V38)
ASLFO_MinHeight (UWORD) - The minimum font height to let the user
select. Default is 5. (V36)
ASLFO_MaxHeight (UWORD) - The maximum font height to let the user
select. Default is 24. (V36)
ASLFO_FilterFunc (struct hook *) - a function to call for each font
encountered. If the function returns TRUE, the font is
included in the font list, otherwise it is rejected
and not displayed. The function receives the following
parameters:
A0 - (struct hook *)
A1 - (struct textattr *)
A2 - (struct fontrequester *)
(V38)
ASLFO_HookFunc (APTR) - A function that is called if the
FOF_FILTERFUNC or FOF_INTUIFUNC flags are specified in
the ASLFO_Flags tag. The function will be called like
so, with the arguments on the stack using the standard
C pushing order:
ULONG function(ULONG mask, aptr object,
struct fontrequester *fr)
The Mask value is a copy of the specific ASLFO_Flags
value the callback is for, either FOF_FILTERFUNC or
FOF_INTUIFUNC; object is a pointer to a data object
(a (struct intuimessage *) for fof_intuifunc, and a
(struct textattr *) for fof_filterfunc).
For FOF_FILTERFUNC, the function should return 1 if the
font should be added to the list, 0 if it
shouldn't. For FOF_INTUIFUNC, the function should
return the original (struct intuimessage *) it was
passed.
ASLFO_MaxFrontPen (UBYTE) - The maximum number of pens that are offered
to the user when the ASLFO_DoFrontPen tag is specified.
Default is 255. (V40)
ASLFO_MaxBackPen (UBYTE) - The maximum number of pens that are offered
to the user when the ASLFO_DoBackPen tag is specified.
Default is 255. (V40)
ASLFO_ModeList (STRPTR *) - Replacement list of modes to display in
Mode cycle gadget. The first string pointer is used
as the name of the gadgets, and following strings are
used as the different labels of the cycle gadget,
until a NULL string pointer which denotes the end of
the string pointer array. The first string in this
array corresponds to JAM1, the second is JAM2, the
third to COMPLEMENT. The array can be early terminated
by not providing all entries. English default for
the array is "Text" "Text+Field" and "Complement".
(V36)
ASLFO_FrontPens (UBYTE *) - Pointer to a table of pen numbers
indicating which colors should be used and edited
by the palette gadget when the ASLFO_DoFrontPen tag is
specified. This array must contain as many entries as
there are colors displayed in the palette gadget. The
Default is NULL, which causes a 1-to-1 mapping of pen
numbers. (V40)
ASLFO_BackPens (UBYTE *) - Pointer to a table of pen numbers
indicating which colors should be used and edited
by the palette gadget when the ASLFO_DoBackPen tag is
specified. This array must contain as many entries as
there are colors displayed in the palette gadget. The
Default is NULL, which causes a 1-to-1 mapping of pen
numbers. (V40)
ASLFO_PopToFront (BOOL) -- When set to TRUE, this tells ASL to
bring the screen to the front the requester has opened on.
The position of the screen will be adjusted, too, to bring
the area into view the window has opened in. The screen
brought to the front will be pushed into the background
again when the requester window closes.
Default is TRUE. (V44)
Tags used for the screen mode requester (V38):
ASLSM_Window (struct window *) - parent window of requester. if no
ASLSM_Screen tag is specified, the window structure
is used to determine on which screen to open the
requesting window. (V38)
ASLSM_PubScreenName (STRPTR) - Name of a public screen to open on.
This overrides the screen used by ASLSM_Window. (V38)
ASLSM_Screen (struct screen *) - screen on which to open the requester.
This overrides the screen used by ASLSM_Window or by
ASLSM_PubScreenName. (V38)
ASLSM_PrivateIDCMP (BOOL) - When set to TRUE, this tells ASL to
allocate a new IDCMP port for the requesting window.
If not specified or set to FALSE, and if ASLSM_Window
is provided, the requesting window will share
ASLSM_Window's IDCMP port. (V38)
ASLSM_IntuiMsgFunc (struct hook *) - a function to call whenever an
unknown Intuition message arrives at the message port
being used by the requesting window. The function
receives the following parameters:
A0 - (struct hook *)
A1 - (struct intuimessage *)
A2 - (struct screenmoderequester *)
(V38)
ASLSM_SleepWindow (BOOL) - When set to TRUE, this tag will cause the
window specified by ASLSM_Window to be "put to
sleep". That is, a busy pointer will be displayed in
the parent window, and no gadget or menu activity will
be allowed. This is done by opening an invisible
Intuition requester in the parent window. (v38)
ASLSM_UserData (APTR) - A 32-bit value that is simply copied in the
sm_UserData field of the requester structure. (V38)
ASLSM_TextAttr (struct textattr *) - font to be used for the requesting
window's gadgets and menus. If this tag is not provided
or its value is NULL, the default font of the screen
on which the requesting window opens will be used.
This font must already be in memory as ASL calls
openfont() and not opendiskfont().
(V38)
ASLSM_Locale (struct locale *) - locale to use for the requesting
window. This determines the language used for the
requester's gadgets and menus. If this tag is not
provided or its value is NULL, the system's current
default locale will be used. (V38)
ASLSM_TitleText (STRPTR) - Title to use for the requesting window.
Default is no title. (V38)
ASLSM_PositiveText (STRPTR) - Label of the positive gadget in the
requester. English default is "OK". Prior to V38, this
string could not be longer than 6 characters. (V36)
ASLSM_NegativeText (STRPTR) - Label of the negative gadget in the
requester. English default is "Cancel". Prior to V38,
this string could not be longer than 6 characters.
(V36)
ASLSM_InitialLeftEdge (WORD) - Suggested left edge of requesting
window. (V38)
ASLSM_InitialTopEdge (WORD) - Suggested top edge of requesting
window. (V38)
ASLSM_InitialWidth (WORD) - Suggested width of requesting window. (V38)
ASLSM_InitialHeight (WORD) - Suggested height of requesting window.
(V38)
ASLSM_InitialDisplayID (ULONG) - Initial setting of the Mode list view
gadget (sm_DisplayID). Default is 0 (LORES_KEY). (V38)
ASLSM_InitialDisplayWidth (ULONG) - Initial setting of the Width gadget
(sm_DisplayWidth). Default is 640. (V38)
ASLSM_InitialDisplayHeight (ULONG) - Initial setting of the Height
gadget (sm_DisplayHeight). Default is 200. (V38)
ASLSM_InitialDisplayDepth (UWORD) - Initial setting of the Colors
gadget (sm_DisplayDepth). Default is 2. (V38)
ASLSM_InitialOverscanType (UWORD) - Initial setting of the
Overscan Type cycle gadget (sm_OverscanType).
These values are the OSCAN_#? values from
<intuition/screens.h>.
User-space naming of overscan types is different than
programmer-space:
Under V38:
0 --> "Regular Size"
OSCAN_TEXT --> "Text Size"
OSCAN_STANDARD --> "Graphics Size"
OSCAN_MAXIMUM --> "Maximum Size"
Under V39 and above:
OSCAN_TEXT --> "Text Size"
OSCAN_STANDARD --> "Graphics Size"
OSCAN_MAXIMUM --> "Extreme Size"
OSCAN_VIDEO --> "Maximum Size"
OSCAN_VIDEO is not supported prior to V39. The value
0 corresponds to "Regular Size" under V38. Since this
value isn't supported by Intuition's SA_Overscan
tag, it was removed from ASL in V39. Asking for 0
under V39 will yield OSCAN_TEXT.
Default is OSCAN_TEXT. (V38)
ASLSM_InitialAutoScroll (BOOL) - Initial setting of the AutoScroll
cycle gadget (sm_AutoScroll). Default is TRUE. (V38)
ASLSM_InitialInfoOpened (BOOL) - Whether to open the property
information window automatically. Default is FALSE.
(V38)
ASLSM_InitialInfoLeftEdge (WORD) - Initial left edge of information
window. (V38)
ASLSM_InitialInfoTopEdge (WORD) - Initial top edge of information
window. (V38)
ASLSM_DoWidth (BOOL) - Set this tag to TRUE to cause the requester
to display the Width numeric gadget. Default is FALSE.
(V38)
ASLSM_DoHeight (BOOL) - Set this tag to TRUE to cause the requester
to display the Height numeric gadget. Default is FALSE.
(V38)
ASLSM_DoDepth (BOOL) - Set this tag to TRUE to cause the requester to
display the Colors slider gadget. Default is FALSE.
(V38)
ASLSM_DoOverscanType (BOOL) - Set this tag to TRUE to cause the
requester to display the Overscan Type cycle gadget.
Default is FALSE. (V38)
ASLSM_DoAutoScroll (BOOL) - Set this tag to TRUE to cause the requester
to display the AutoScroll checkbox gadget. Default is
FALSE. (V38)
ASLSM_PropertyFlags (ULONG) - A mode must have these property flags to
appear in the list of modes. Only the bits set in
ASLSM_PropertyMask are considered. See the description
of ASLSM_PropertyMask for more info. Default is
DIPF_IS_WB. (V38)
ASLSM_PropertyMask (ULONG) - A mask to apply to ASLSM_PropertyFlags
to determine which bits to consider. The use of these
two values is identical in concept to how Exec uses
the two flag paraneters in exec.library/setsignal().
Default is DIPF_IS_WB. This is how this tag and the
ASLSM_PropertyFlags tag interact:
if ((displayInfo.PropertyFlags & propertyMask) ==
(propertyFlags & propertyMask))
{
/* Mode accepted */
}
else
{
/* Mode rejected */
}
where "displayInfo" is a filled in displayinfo
structure for a given mode. (V38)
ASLSM_MinWidth (ULONG) - The minimum display width to let the user
choose. Default is 16. (V38)
ASLSM_MaxWidth (ULONG) - The maximum display width to let the user
choose. Default is 16368. (V38)
ASLSM_MinHeight (ULONG) - The minimum display height to let the user
choose. Default is 16. (V38)
ASLSM_MaxHeight (ULONG) - The maximum display height to let the user
choose. Default is 16384. (V38)
ASLSM_MinDepth (UWORD) - The minimum display depth to let the user
choose. Default is 1. (V38)
ASLSM_MaxDepth (UWORD) - The maximum display depth to let the user
choose. Default is 24. (V38)
ASLSM_FilterFunc (struct hook *) - a function to call for each mode
encountered. If the function returns TRUE, the mode is
included in the file list, otherwise it is rejected
and not displayed. The function receives the following
parameters:
A0 - (struct hook *)
A1 - (ULONG) mode id
A2 - (struct screenmoderequester *)
(V38)
ASLSM_CustomSMList (struct list *) - custom list of modes to let
the user choose from. This is a list of DisplayNode
nodes, see <libraries/asl.h> for the definition. (v38)
ASLSM_PopToFront (BOOL) -- When set to TRUE, this tells ASL to
bring the screen to the front the requester has opened on.
The position of the screen will be adjusted, too, to bring
the area into view the window has opened in. The screen
brought to the front will be pushed into the background
again when the requester window closes.
Default is TRUE. (V44)
RESULT
result - FALSE if the user cancelled the requester or if something
prevented the requester from opening. If TRUE, values in the
requester structure will be set depending on the particular
type of requester.
Under V38, If the return value is FALSE, you can look
at the result from the dos.library/ioerr() function to
determine whether the requester was cancelled or simply
failed to open. If dos.library/ioerr() returns 0, then the
requester was cancelled, any other value indicates a failure
to open. Current possible failure codes are
ERROR_NO_FREE_STORE which indicates there was not enough
memory, and ERROR_NO_MORE_ENTRIES which indicates no modes
were available for display in the screen mode requester
(usually because the application filter hook filtered them
all away)
WARNING
All ASL requester data structures are READ-ONLY and can only be
modified by using tags!
You must not specify requester options by using both pre-V38
tags like ASLFR_Flags1 and V38 tags like ASLFR_DoSaveMode as
this can lead to unexpected results.
Take care when attaching an ASL requester to a simple refresh
window or a window that already shares its IDCMP with other
windows. In such cases you must ask for the ASL requester to
allocate a private IDCMP (with the ASLFR_PrivateIDCMP,
ASLFO_PrivateIDCMP and ASLSM_PrivateIDCMP tags) or your window
will lose IDCMP_REFRESHWINDOW events and other messages.
BUGS
Under V38 and V39, the filtering functions for the file requester
were only asked to filter drawer selections if the ASLFR_FilterDrawers
tag was set to TRUE. The compatible behavior, reestablished in V40,
is to always pass drawers for filtering.
NOTES
As of V38-V40 the ASL requester uses gadtools.library routines to
create and maintain its user interface. Every intuimessage the library
passes through the functions specified with ASLSM_IntuiMsgFunc and
ASLSM_HookFunc will have been filtered through the
gadtools.library/gt_getimsg() routine.
SEE ALSO
allocaslrequest(), freeaslrequest()