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content / browser / renderer_host / direct_manipulation_event_handler_win.h [blame]
// 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_