From e3dd884815b2aaeec4241859722ab603e0b1466b Mon Sep 17 00:00:00 2001
From: Dianne Hackborn <hackbod@google.com>
Date: Tue, 14 Jul 2009 12:06:54 -0700
Subject: Implement virtual button support.

The kernel can now publish a property describing the layout of virtual
hardware buttons on the touchscreen.  These outside of the display
area (outside of the absolute x and y controller range the driver
reports), and when the user presses on them a key event will be
generated rather than a touch event.

This also includes a number of tweaks to the absolute controller
processing to make things work better on the new screens.  For
example, we now reject down events outside of the display area.

Still left to be done is the ability to cancel a key down event,
so the user can slide up from the virtual keys to the touch screen
without causing a virtual key to execute.
---
 libs/ui/EventHub.cpp | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'libs/ui/EventHub.cpp')

diff --git a/libs/ui/EventHub.cpp b/libs/ui/EventHub.cpp
index 13c30a795cb2..a72f055c388c 100644
--- a/libs/ui/EventHub.cpp
+++ b/libs/ui/EventHub.cpp
@@ -240,6 +240,35 @@ int EventHub::getKeycodeState(int32_t deviceId, int code) const
     return 0;
 }
 
+status_t EventHub::scancodeToKeycode(int32_t deviceId, int scancode,
+        int32_t* outKeycode, uint32_t* outFlags) const
+{
+    AutoMutex _l(mLock);
+    device_t* device = getDevice(deviceId);
+    
+    if (device != NULL && device->layoutMap != NULL) {
+        status_t err = device->layoutMap->map(scancode, outKeycode, outFlags);
+        if (err == NO_ERROR) {
+            return NO_ERROR;
+        }
+    }
+    
+    if (mHaveFirstKeyboard) {
+        device = getDevice(mFirstKeyboardId);
+        
+        if (device != NULL && device->layoutMap != NULL) {
+            status_t err = device->layoutMap->map(scancode, outKeycode, outFlags);
+            if (err == NO_ERROR) {
+                return NO_ERROR;
+            }
+        }
+    }
+    
+    *outKeycode = 0;
+    *outFlags = 0;
+    return NAME_NOT_FOUND;
+}
+
 EventHub::device_t* EventHub::getDevice(int32_t deviceId) const
 {
     if (deviceId == 0) deviceId = mFirstKeyboardId;
-- 
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