Revision 8351d2d4

b/sdl.c
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        buttons |= MOUSE_EVENT_MBUTTON;
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    /* XXX: test wheel */
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    dz = 0;
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#ifdef SDL_BUTTON_WHEELUP
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    if (state & SDL_BUTTON(SDL_BUTTON_WHEELUP))
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        dz--;
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    if (state & SDL_BUTTON(SDL_BUTTON_WHEELDOWN))
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        dz++;
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#endif
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    kbd_mouse_event(dx, dy, dz, buttons);
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}
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