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Date: Fri, 14 Jan 2011 15:23:38 +0100
From: Gerd Hoffmann <kraxel@redhat.com>
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Subject: Re: [Qemu-devel] paravirtual tablet v2
References: <4D303B5B.6070609@redhat.com> <4D305B1A.3030801@codemonkey.ws>
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To: Anthony Liguori <anthony@codemonkey.ws>
Cc: spice-devel <spice-devel@lists.freedesktop.org>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>


>> /*
>> * QEMU_PVTABLET_MSG_BTN_{DOWN,UP}, host -> guest
>> * send button press+release events
>> */
>> typedef struct qemu_pvtablet_button {
>> uint32_t button;
>> uint32_t mask;
>> } qemu_pvtablet_button;
>
> What's the semantic of button and mask? I'd assume that mask is the new
> button mask but then I'm not sure what button is used for.

"button" is the index of the button which was pressed (BTN_DOWN) or 
released (BTN_UP).  "mask" is the new button mask.

cheers,
   Gerd