aura-x11: Fix touch-calibration for multi-monitor setups.

ui/base/events/event.cc

Index: ui/base/events/event.cc
diff --git a/ui/base/events/event.cc b/ui/base/events/event.cc
index fdc40b42df159137ddc75e34bc5a985e19302fad..298ae6a73a54936bb010f30082f09e57877b3a65 100644
--- a/ui/base/events/event.cc
+++ b/ui/base/events/event.cc
@@ -291,6 +291,16 @@ TouchEvent::TouchEvent(EventType type,
 TouchEvent::~TouchEvent() {
 }
 
+void TouchEvent::CalibrateLocation(const gfx::Size& from, const gfx::Size& to) {
+  int calibrated_x = x() * to.width() / from.width();

[Daniel Erat, 2012/09/10 17:27:31]

nit: cast to floating-point and round?

[sadrul, 2012/09/10 18:19:32]

Done.

+  int calibrated_y = y() * to.height() / from.height();
+  location_ = gfx::Point(calibrated_x, calibrated_y);
+
+  calibrated_x = root_location().x() * to.width() / from.width();
+  calibrated_y = root_location().y() * to.height() / from.height();
+  root_location_ = gfx::Point(calibrated_x, calibrated_y);
+}
+
 void TouchEvent::UpdateForRootTransform(const Transform& root_transform) {
   LocatedEvent::UpdateForRootTransform(root_transform);
   gfx::Point3f scale;