Re: [gtk-list] Re: what are equiv of Motif actions?

[Havoc Pennington <rhp zirx pair com>]

On Sun, 6 Jun 1999, Michael J. Hammel wrote:
> 
> BTW, is there a way to determine what the MODx enums map to on a keyboard?
>

Gtk itself assumes Alt is on MOD1, but this isn't really right I'm told.
Code from AbiWord:


#include <gdk/gdkx.h>
#include <X11/keysym.h>

static GdkModifierType s_getAltMask(void)
{
        //////////////////////////////////////////////////////////////////
        // find out what modifier mask XL_Alt_{L,R} are bound to.
        //////////////////////////////////////////////////////////////////
        
        int alt_mask = 0;

        Display * display = GDK_DISPLAY();

        KeyCode kcAltL = XKeysymToKeycode(display,XK_Alt_L);
        KeyCode kcAltR = XKeysymToKeycode(display,XK_Alt_R);

        XModifierKeymap * pModMap = XGetModifierMapping(display);
        int mkpm = pModMap->max_keypermod;
        int k,m;
        int mAltL=-1;
        int mAltR=-1;
        
        for (m=0; m<8; m++)
        {
                for (k=0; k<mkpm; k++)
                {
                        KeyCode code = pModMap->modifiermap[m*mkpm + k];
                        if (kcAltL && (code == kcAltL))
                                mAltL = m;
                        if (kcAltR && (code == kcAltR))
                                mAltR = m;
                }
        }

        switch (mAltL)
        {
        default:                                                        //
Shoul
d not happen...
        case -1:                                                        //
Alt_L
 is not a modifier key ??
        case 0:                                                         //
Alt_L
 is mapped to SHIFT ??
        case 1:                                                         //
Alt_L
 is mapped to (Caps)LOCK ??
        case 2:                                                         //
Alt_L

 is mapped to CONTROL ??
                break;                                                  //
... i
gnore this key.
                
        case 3: alt_mask |= GDK_MOD1_MASK; break;
        case 4: alt_mask |= GDK_MOD2_MASK; break;
        case 5: alt_mask |= GDK_MOD3_MASK; break;
        case 6: alt_mask |= GDK_MOD4_MASK; break;
        case 7: alt_mask |= GDK_MOD5_MASK; break;
        }

        switch (mAltR)
        {
        default:                                                        //
Shoul
d not happen...
        case -1:                                                        //
Alt_R
 is not a modifier key ??
        case 0:                                                         //
Alt_R
 is mapped to SHIFT ??
        case 1:                                                         //
Alt_R
 is mapped to (Caps)LOCK ??
        case 2:                                                         //
Alt_R is mapped to CONTROL ??
                break;                                                  //
... i
gnore this key.
                
        case 3: alt_mask |= GDK_MOD1_MASK; break;
        case 4: alt_mask |= GDK_MOD2_MASK; break;
        case 5: alt_mask |= GDK_MOD3_MASK; break;
        case 6: alt_mask |= GDK_MOD4_MASK; break;
        case 7: alt_mask |= GDK_MOD5_MASK; break;
        }

        XFreeModifiermap(pModMap);

        if (!alt_mask)                                          // if
nothing se
t, fall back to MOD1
                alt_mask = GDK_MOD1_MASK;
        
        UT_DEBUGMSG(("Keycodes for alt [l 0x%x][r 0x%x] using modifiers
[%d %d] 
yields [0x%x]\n",kcAltL,kcAltR,mAltL-2,mAltR-2,alt_mask));

        return (GdkModifierType)alt_mask;
}

Havoc