SetKeyMapDefault() changes "global" keymap?

[javierdlr]

Hi, testing keymap.library (SDK) and using ObtainKeyMapInfo() I can get whatever KEYMAP: I want/need, but how does SetKeyMapDefault() work?
Does SetKeyMapDefault() change globally in my system the KEYMAP I want/need?
How? The code example below shows 'KEYMAP:usa_ISO-8859-15' info/data OK, but if I try to change my keymap from e_ISO-8859-15 (defined in input.prefs) to 'usa_ISO-8859-15' with SetKeyMapDefault() seems nothing happens.

Code: Select all

int main(void)
{
 ULONG KM_res;
 APTR KM_handle;
 STRPTR KM_name, KM_localname;
 //struct KeyMap *km = NULL;
 struct KeyMapNode *kmn = NULL;
..
open KeymapBase & IFace
..
 KM_handle = IKeymap->OpenKeyMapHandle("KEYMAP:usa_ISO-8859-15", NULL);

 KM_res = IKeymap->ObtainKeyMapInfo(KM_handle,
                                     KEYMAPINFO_KEYMAPNODE, &kmn,
                                     KEYMAPINFO_INFOTEXT_ENGLISH, &KM_name,
                                     KEYMAPINFO_INFOTEXT_LOCAL, &KM_localname,
                                    TAG_END);

 IDOS->Printf("(0x%08lx) %s | %s\n",kmn->kn_KeyMap,KM_name,KM_localname);

 IKeymap->SetKeyMapDefault(kmn->kn_KeyMap);
..
close KeymapBase & IFace
..
return(0);
}

BTW: how can I retrive my default keymap name and localname?
BTW2: must I ReleaseKeyMapInfo() if I use ObtainKeyMapInfo() in my code?

TIA

[trixie]

Could it be because SetKeyMapDefault() expects a POINTER to struct KeyMap as parameter, whereas your kmn->kn_KeyMap provides the actual structure (not a pointer to it)? You must pass the address of the kn_KeyMap field, using the & operator.

[salass00]

To add to what trixie wrote you are not allowed to free the keymap after you have used it with SetKeyMapDefault() (this fact is stated in the autodoc).

[javierdlr]

Could it be because SetKeyMapDefault() expects a POINTER to struct KeyMap as parameter, whereas your kmn->kn_KeyMap provides the actual structure (not a pointer to it)? You must pass the address of the kn_KeyMap field, using the & operator.

Ooops, YES thx that solved.

BTW if I use 'keyMap = AskKeyMapDefault()' can then I use (pseudo_code):

Code: Select all

struct KeyMapNode
{
    struct Node   kn_Node;   /* including name of keymap */
    struct KeyMap kn_KeyMap;
} kmn;

 kmn->kn_KeyMap = keyMap;

so I get the 'name of the keymap'?
well just trying it now to see what happens...

THX

[javierdlr]

To add to what trixie wrote you are not allowed to free the keymap after you have used it with SetKeyMapDefault() (this fact is stated in the autodoc).

Yes, you're right, now I see.

And if I use ObtainKeyMapInfo() only to create a list/table, then I must use ReleaseKeyMapInfo() after each ObtainKeyMapInfo() read?

[trixie]

@javierdl

No, I'm afraid you got it all wrong. Do you use MemGuard when developing? You program must be trashing memory all along the watchtower!

if I use 'keyMap = AskKeyMapDefault()' can then I use (pseudo_code):

Code: Select all

struct KeyMapNode
{
    struct Node   kn_Node;   /* including name of keymap */
    struct KeyMap kn_KeyMap;
} kmn;

 kmn->kn_KeyMap = keyMap; 

First, your kmn is declared as a physical structure KeyMapNode here (not as a pointer to this structure), so you cannot use the -> operator to access its members (fields). Second, the kn_KeyMap field is declared as a physical structure KeyMap, so you cannot initialize it with your result from AskKeyMapDefault() because the result is a pointer.

so I get the 'name of the keymap'?

Still, even if you fix the problems above, this approach will get you nowhere. The name of the keymap is stored in the ln_Name field of the Node structure that is embedded in struct KeyMapNode. But function AskKeyMapDefault() has no knowledge of struct KeyMapNode so it cannot possibly supply the name of the default keymap in the ln_Name field.

[javierdlr]

@javierdl

No, I'm afraid you got it all wrong. Do you use MemGuard when developing? You program must be trashing memory all along the watchtower!

Nop, but the os4 internal MUNGE option.

Still, even if you fix the problems above, this approach will get you nowhere. The name of the keymap is stored in the ln_Name field of the Node structure that is embedded in struct KeyMapNode. But function AskKeyMapDefault() has no knowledge of struct KeyMapNode so it cannot possibly supply the name of the default keymap in the ln_Name field.

OK, so now there is no "direct" function/way to get default keyboard name/charset/...
Right now I'm reading 'ENV:input.prefs' and getting the variables/data I need using the example from the wiki http://wiki.amigaos.net/index.php/Prefe ... ences_File

THX for all the help mate

[trixie]

OK, so now there is no "direct" function/way to get default keyboard name/charset/...

Possibly not. I'm quite surprised that OpenKeyMapHandleA() does not accept a NULL name argument, in which case the function would return handle to the current default keymap. This way you could get your KeyMapNode and, thus, the name of the default keymap as well. Time for an enhancement request perhaps?

As for charset, you can read the system env-var called "Charset" (I think).

[chris]

As for charset, you can read the system env-var called "Charset" (I think).

It's better to use GetDiskFontCtrl().

[trixie]

@chris

This function should never be called by the average user. Its sole purpose is to provide the font preferences editor with data about the current diskfont settings. It should not be called for other purposes.

The GetDiskFontCtrl() autodoc doesn't sound very encouraging, though