summaryrefslogtreecommitdiffstats
path: root/ppapi/cpp/touch_point.h
diff options
context:
space:
mode:
Diffstat (limited to 'ppapi/cpp/touch_point.h')
-rw-r--r--ppapi/cpp/touch_point.h54
1 files changed, 54 insertions, 0 deletions
diff --git a/ppapi/cpp/touch_point.h b/ppapi/cpp/touch_point.h
new file mode 100644
index 0000000..0868061
--- /dev/null
+++ b/ppapi/cpp/touch_point.h
@@ -0,0 +1,54 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PPAPI_CPP_TOUCH_POINT_H_
+#define PPAPI_CPP_TOUCH_POINT_H_
+
+#include "ppapi/c/ppb_input_event.h"
+#include "ppapi/cpp/input_event.h"
+#include "ppapi/cpp/point.h"
+
+namespace pp {
+
+/// Wrapper class for PP_TouchPoint.
+class TouchPoint {
+ public:
+ TouchPoint() : touch_point_(PP_MakeTouchPoint()) {}
+
+ TouchPoint(const PP_TouchPoint& point) : touch_point_(point) {}
+
+ /// @return The identifier for this TouchPoint. This corresponds to the order
+ /// in which the points were pressed. For example, the first point to be
+ /// pressed has an id of 0, the second has an id of 1, and so on. An id can be
+ /// reused when a touch point is released. For example, if two fingers are
+ /// down, with id 0 and 1, and finger 0 releases, the next finger to be
+ /// pressed can be assigned to id 0.
+ uint32_t id() const { return touch_point_.id; }
+
+ /// @return The x-y coordinates of this TouchPoint, in DOM coordinate space.
+ FloatPoint position() const {
+ return pp::FloatPoint(touch_point_.position);
+ }
+
+ /// @return The elliptical radii, in screen pixels, in the x and y direction
+ /// of this TouchPoint.
+ FloatPoint radii() const { return pp::FloatPoint(touch_point_.radius); }
+
+ /// @return The angle of rotation of the elliptical model of this TouchPoint
+ /// from the y-axis.
+ float rotation_angle() const { return touch_point_.rotation_angle; }
+
+ /// @return The pressure applied to this TouchPoint. This is typically a
+ /// value between 0 and 1, with 0 indicating no pressure and 1 indicating
+ /// some maximum pressure, but scaling differs depending on the hardware and
+ /// the value is not guaranteed to stay within that range.
+ float pressure() const { return touch_point_.pressure; }
+
+ private:
+ PP_TouchPoint touch_point_;
+};
+
+} // namespace pp
+
+#endif /* PPAPI_CPP_TOUCH_POINT_H_ */