1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_RENDERER_HOST_DIRECT_MANIPULATION_EVENT_HANDLER_WIN_H_
#define CONTENT_BROWSER_RENDERER_HOST_DIRECT_MANIPULATION_EVENT_HANDLER_WIN_H_
#include <windows.h>
#include <directmanipulation.h>
#include <wrl.h>
#include "base/memory/raw_ptr.h"
#include "ui/gfx/geometry/size.h"
namespace ui {
class WindowEventTarget;
} // namespace ui
namespace content {
class DirectManipulationHelper;
class DirectManipulationBrowserTestBase;
class DirectManipulationUnitTest;
// DirectManipulationEventHandler receives status update and gesture events from
// Direct Manipulation API.
class DirectManipulationEventHandler
: public Microsoft::WRL::RuntimeClass<
Microsoft::WRL::RuntimeClassFlags<
Microsoft::WRL::RuntimeClassType::ClassicCom>,
Microsoft::WRL::Implements<
Microsoft::WRL::RuntimeClassFlags<
Microsoft::WRL::RuntimeClassType::ClassicCom>,
Microsoft::WRL::FtmBase,
IDirectManipulationViewportEventHandler,
IDirectManipulationInteractionEventHandler>> {
public:
DirectManipulationEventHandler(ui::WindowEventTarget* event_target);
DirectManipulationEventHandler(const DirectManipulationEventHandler&) =
delete;
DirectManipulationEventHandler& operator=(
const DirectManipulationEventHandler&) = delete;
// Return true if viewport_size_in_pixels_ changed.
bool SetViewportSizeInPixels(const gfx::Size& viewport_size_in_pixels);
void SetDeviceScaleFactor(float device_scale_factor);
void SetDirectManipulationHelper(DirectManipulationHelper* helper);
private:
friend class DirectManipulationBrowserTestBase;
friend DirectManipulationUnitTest;
// DirectManipulationEventHandler();
~DirectManipulationEventHandler() override;
enum class GestureState { kNone, kScroll, kFling, kPinch };
void TransitionToState(GestureState gesture);
HRESULT STDMETHODCALLTYPE
OnViewportStatusChanged(_In_ IDirectManipulationViewport* viewport,
_In_ DIRECTMANIPULATION_STATUS current,
_In_ DIRECTMANIPULATION_STATUS previous) override;
HRESULT STDMETHODCALLTYPE
OnViewportUpdated(_In_ IDirectManipulationViewport* viewport) override;
HRESULT STDMETHODCALLTYPE
OnContentUpdated(_In_ IDirectManipulationViewport* viewport,
_In_ IDirectManipulationContent* content) override;
HRESULT STDMETHODCALLTYPE
OnInteraction(_In_ IDirectManipulationViewport2* viewport,
_In_ DIRECTMANIPULATION_INTERACTION_TYPE interaction) override;
raw_ptr<DirectManipulationHelper> helper_ = nullptr;
raw_ptr<ui::WindowEventTarget> event_target_ = nullptr;
float device_scale_factor_ = 1.0f;
float last_scale_ = 1.0f;
int last_x_offset_ = 0;
int last_y_offset_ = 0;
bool should_send_scroll_begin_ = false;
// Current recognized gesture from Direct Manipulation.
GestureState gesture_state_ = GestureState::kNone;
gfx::Size viewport_size_in_pixels_;
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_DIRECT_MANIPULATION_EVENT_HANDLER_WIN_H_
|
