| // Copyright (c) 2016 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 UI_EVENTS_X_EVENTS_X_UTILS_H_ |
| #define UI_EVENTS_X_EVENTS_X_UTILS_H_ |
| |
| #include <stdint.h> |
| |
| #include <memory> |
| |
| #include "base/time/tick_clock.h" |
| #include "base/time/time.h" |
| #include "ui/events/event_constants.h" |
| #include "ui/events/pointer_details.h" |
| #include "ui/events/x/events_x_export.h" |
| #include "ui/gfx/geometry/point.h" |
| #include "ui/gfx/x/x11_types.h" |
| |
| namespace ui { |
| |
| // Gets the EventType from a XEvent. |
| EVENTS_X_EXPORT EventType EventTypeFromXEvent(const XEvent& xev); |
| |
| // Gets the EventFlags from a XEvent. |
| EVENTS_X_EXPORT int EventFlagsFromXEvent(const XEvent& xev); |
| |
| // Gets the timestamp from a XEvent. |
| EVENTS_X_EXPORT base::TimeTicks EventTimeFromXEvent(const XEvent& xev); |
| |
| // Gets the location from a XEvent. The coordinate system of the resultant |
| // |Point| has the origin at top-left of the "root window". The nature of |
| // this "root window" and how it maps to platform-specific drawing surfaces is |
| // defined in ui/aura/root_window.* and ui/aura/window_tree_host*. |
| EVENTS_X_EXPORT gfx::Point EventLocationFromXEvent(const XEvent& xev); |
| |
| // Gets the location in native system coordinate space. |
| EVENTS_X_EXPORT gfx::Point EventSystemLocationFromXEvent(const XEvent& xev); |
| |
| // Returns the 'real' button for an event. The button reported in slave events |
| // does not take into account any remapping (e.g. using xmodmap), while the |
| // button reported in master events do. This is a utility function to always |
| // return the mapped button. |
| EVENTS_X_EXPORT int EventButtonFromXEvent(const XEvent& xev); |
| |
| // Returns the flags of the button that changed during a press/release. |
| EVENTS_X_EXPORT int GetChangedMouseButtonFlagsFromXEvent(const XEvent& xev); |
| |
| // Gets the mouse wheel offsets from a XEvent. |
| EVENTS_X_EXPORT gfx::Vector2d GetMouseWheelOffsetFromXEvent(const XEvent& xev); |
| |
| // Clear the touch id from bookkeeping if it is a release/cancel event. |
| EVENTS_X_EXPORT void ClearTouchIdIfReleasedFromXEvent(const XEvent& xev); |
| |
| // Gets the touch id from a XEvent. |
| EVENTS_X_EXPORT int GetTouchIdFromXEvent(const XEvent& xev); |
| |
| // Gets the radius along the X/Y axis from a XEvent. Default is 1.0. |
| EVENTS_X_EXPORT float GetTouchRadiusXFromXEvent(const XEvent& xev); |
| EVENTS_X_EXPORT float GetTouchRadiusYFromXEvent(const XEvent& xev); |
| |
| // Gets the angle of the major axis away from the X axis. Default is 0.0. |
| EVENTS_X_EXPORT float GetTouchAngleFromXEvent(const XEvent& xev); |
| |
| // Gets the force from a native_event. Normalized to be [0, 1]. Default is 0.0. |
| EVENTS_X_EXPORT float GetTouchForceFromXEvent(const XEvent& xev); |
| |
| // Gets the pointer type from a native_event. |
| EVENTS_X_EXPORT EventPointerType |
| GetTouchPointerTypeFromXEvent(const XEvent& xev); |
| |
| // Gets the pointer details from an XEvent. |
| EVENTS_X_EXPORT PointerDetails |
| GetTouchPointerDetailsFromXEvent(const XEvent& xev); |
| |
| // Returns whether this is a scroll event and optionally gets the amount to be |
| // scrolled. |x_offset|, |y_offset| and |finger_count| can be NULL. |
| EVENTS_X_EXPORT bool GetScrollOffsetsFromXEvent(const XEvent& xev, |
| float* x_offset, |
| float* y_offset, |
| float* x_offset_ordinal, |
| float* y_offset_ordinal, |
| int* finger_count); |
| |
| // Gets the fling velocity from a XEvent. is_cancel is set to true if |
| // this was a tap down, intended to stop an ongoing fling. |
| EVENTS_X_EXPORT bool GetFlingDataFromXEvent(const XEvent& xev, |
| float* vx, |
| float* vy, |
| float* vx_ordinal, |
| float* vy_ordinal, |
| bool* is_cancel); |
| |
| // Uses the XModifierStateWatcher to determine if alt is pressed or not. |
| EVENTS_X_EXPORT bool IsAltPressed(); |
| |
| EVENTS_X_EXPORT void ResetTimestampRolloverCountersForTesting(); |
| |
| } // namespace ui |
| |
| #endif // UI_EVENTS_X_EVENTS_X_UTILS_H_ |