Hi!
I'm using custom input device to inject keyboard and touch events from the
remote side. It is working in portrait mode, but not in landscape mode.
I'm testing this functionality on Galaxy S2 and Nexus7 hardware devices.
Galaxy S2 has screen size 480x800, so I configure uinput device with:
uidev.absmin[ABS_MT_POSITION_X] = 0;
uidev.absmax[ABS_MT_POSITION_X] = 479;
uidev.absmin[ABS_MT_POSITION_Y] = 0;
uidev.absmax[ABS_MT_POSITION_X] = 799;
When the device is rotated, the width changes to 800 and height changes to
480. At first I thought that I'd need to translate coordinates, but it
seems that Android does that itself. The problem here is, because I can't
inject coordinates for X axis beyond 479, because this is what I've set for
maximum.
If I change absmax property and set it to 799, Android will just "scale"
the input coordinate space [0,799] to output [0,479], so that X value 799
comes out to 479.
So I haven't found a way to inject pointer events in landscape mode which
exceed the "portrait width". I'm sure there's something I'm missing, though
I don't know what.
uidev configuration I'm using:
uinput_user_dev uidev;
memset(&uidev, 0, sizeof(uidev));
snprintf(uidev.name, UINPUT_MAX_NAME_SIZE, "uinput-custom");
uidev.id.bustype = BUS_USB;
uidev.id.vendor = 0x1234;
uidev.id.product = 0xfedc;
uidev.id.version = 3;
uidev.absmin[ABS_MT_SLOT] = 0;
uidev.absmax[ABS_MT_SLOT] = 1; // two touches supported (well, someday,
perhaps)
uidev.absmin[ABS_MT_TOUCH_MAJOR] = 0; // touched area
uidev.absmax[ABS_MT_TOUCH_MAJOR] = 255;
uidev.absmin[ABS_MT_POSITION_X] = 0;
uidev.absmax[ABS_MT_POSITION_X] = m_width-1;
uidev.absmin[ABS_MT_POSITION_Y] = 0;
uidev.absmax[ABS_MT_POSITION_Y] = m_height-1;
// uidev.absmin[ABS_X] = 0;
// uidev.absmax[ABS_X] = m_width - 1;
// uidev.absmin[ABS_Y] = 0;
// uidev.absmax[ABS_Y] = m_height - 1;
uidev.absmin[ABS_MT_TRACKING_ID] = 0; // new ID for each touch event
uidev.absmax[ABS_MT_TRACKING_ID] = 65535;
uidev.absmin[ABS_MT_PRESSURE] = 0;
uidev.absmax[ABS_MT_PRESSURE] = 30;
uidev.absmin[ABS_MT_TOOL_TYPE] = 0;
uidev.absmax[ABS_MT_TOOL_TYPE] = 1;
And for each touch event, I'm using MT_TOOL_PEN, because MT_TOOL_FINGER
didn't work (nothing happened).
I also tried to create uinput device while the device is in landscape mode
using width=799 and height=479, but that just scales the output domain as
well.
Kind regards,
Miha.
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