123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108 |
- // Copyright 2015 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 CC_INPUT_SCROLL_STATE_H_
- #define CC_INPUT_SCROLL_STATE_H_
- #include "cc/cc_export.h"
- #include "cc/input/scroll_state_data.h"
- #include "ui/gfx/geometry/vector2d_f.h"
- namespace cc {
- // ScrollState is based on the proposal for scroll customization in blink, found
- // here: https://goo.gl/1ipTpP.
- class CC_EXPORT ScrollState {
- public:
- explicit ScrollState(ScrollStateData data);
- ScrollState(const ScrollState& other);
- ~ScrollState();
- // Reduce deltas by x, y.
- void ConsumeDelta(double x, double y);
- // Positive when scrolling right.
- double delta_x() const { return data_.delta_x; }
- // Positive when scrolling down.
- double delta_y() const { return data_.delta_y; }
- // Positive when scrolling right.
- double delta_x_hint() const { return data_.delta_x_hint; }
- // Positive when scrolling down.
- double delta_y_hint() const { return data_.delta_y_hint; }
- // The location associated with this scroll update. For touch, this is the
- // position of the finger. For mouse, the location of the cursor.
- int position_x() const { return data_.position_x; }
- int position_y() const { return data_.position_y; }
- double velocity_x() const { return data_.velocity_x; }
- double velocity_y() const { return data_.velocity_y; }
- bool is_beginning() const { return data_.is_beginning; }
- void set_is_beginning(bool is_beginning) {
- data_.is_beginning = is_beginning;
- }
- bool is_in_inertial_phase() const { return data_.is_in_inertial_phase; }
- void set_is_in_inertial_phase(bool is_in_inertial_phase) {
- data_.is_in_inertial_phase = is_in_inertial_phase;
- }
- bool is_ending() const { return data_.is_ending; }
- void set_is_ending(bool is_ending) { data_.is_ending = is_ending; }
- // True if the user interacts directly with the screen, e.g., via touch.
- bool is_direct_manipulation() const { return data_.is_direct_manipulation; }
- void set_is_direct_manipulation(bool is_direct_manipulation) {
- data_.is_direct_manipulation = is_direct_manipulation;
- }
- // True if the user interacts with the scrollbar.
- bool is_scrollbar_interaction() const {
- return data_.is_scrollbar_interaction;
- }
- void set_is_scrollbar_interaction(bool is_scrollbar_interaction) {
- data_.is_scrollbar_interaction = is_scrollbar_interaction;
- }
- bool delta_consumed_for_scroll_sequence() const {
- return data_.delta_consumed_for_scroll_sequence;
- }
- void set_delta_consumed_for_scroll_sequence(bool delta_consumed) {
- data_.delta_consumed_for_scroll_sequence = delta_consumed;
- }
- void set_caused_scroll(bool x, bool y) {
- data_.caused_scroll_x |= x;
- data_.caused_scroll_y |= y;
- }
- bool caused_scroll_x() const { return data_.caused_scroll_x; }
- bool caused_scroll_y() const { return data_.caused_scroll_y; }
- void set_is_scroll_chain_cut(bool cut) { data_.is_scroll_chain_cut = cut; }
- bool is_scroll_chain_cut() const { return data_.is_scroll_chain_cut; }
- ui::ScrollGranularity delta_granularity() const {
- return data_.delta_granularity;
- }
- // Returns a the delta hints if this is a scroll begin or the real delta if
- // it's a scroll update
- gfx::Vector2dF DeltaOrHint() const;
- ElementId target_element_id() const {
- return data_.current_native_scrolling_element();
- }
- bool is_main_thread_hit_tested() const {
- return data_.is_main_thread_hit_tested;
- }
- ScrollStateData* data() { return &data_; }
- private:
- ScrollStateData data_;
- };
- } // namespace cc
- #endif // CC_INPUT_SCROLL_STATE_H_
|