e58b18888c
This patch adds support for precision touchpad gestures on Windows 8.1 and newer using Direct Manipulation API. Gestures work exactly like on macOS, with full support for pan/pinch and inertia. This works by creating a viewport with a fake scrollable which is reset after every gesture and converts any changes to the content's transform into GHOST trackpad events (as explained [here](https://bugzilla.mozilla.org/show_bug.cgi?id=890878)). The code is based on the implementation from the [Chromium project](https://chromium.googlesource.com/chromium/src/+/refs/heads/master/content/browser/renderer_host/direct_manipulation_helper_win.cc). Tested on Windows 10. Fixes {T70754}, {T69264}. Demo:{F8520272} Reviewed By: nicholas_rishel Differential Revision: https://developer.blender.org/D7660
139 lines
4.4 KiB
C++
139 lines
4.4 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup GHOST
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* Declaration of GHOST DirectManipulation classes.
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*/
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#pragma once
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#ifndef WIN32
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# error WIN32 only!
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#endif // WIN32
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#include "GHOST_Types.h"
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#include <directmanipulation.h>
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#include <wrl.h>
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#define PINCH_SCALE_FACTOR 125.0f
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typedef struct {
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int32_t x, y, scale;
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bool isScrollDirectionInverted;
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} GHOST_TTrackpadInfo;
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class GHOST_DirectManipulationHelper;
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class GHOST_DirectManipulationViewportEventHandler
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: public Microsoft::WRL::RuntimeClass<
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Microsoft::WRL::RuntimeClassFlags<Microsoft::WRL::RuntimeClassType::ClassicCom>,
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Microsoft::WRL::Implements<
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Microsoft::WRL::RuntimeClassFlags<Microsoft::WRL::RuntimeClassType::ClassicCom>,
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Microsoft::WRL::FtmBase,
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IDirectManipulationViewportEventHandler>> {
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public:
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GHOST_DirectManipulationViewportEventHandler(uint16_t dpi);
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/*
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* Resets viewport and tracked touchpad state.
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*/
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void resetViewport(IDirectManipulationViewport *viewport);
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/* DirectManipulation callbacks. */
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HRESULT STDMETHODCALLTYPE OnViewportStatusChanged(IDirectManipulationViewport *viewport,
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DIRECTMANIPULATION_STATUS current,
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DIRECTMANIPULATION_STATUS previous) override;
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HRESULT STDMETHODCALLTYPE OnViewportUpdated(IDirectManipulationViewport *viewport) override;
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HRESULT STDMETHODCALLTYPE OnContentUpdated(IDirectManipulationViewport *viewport,
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IDirectManipulationContent *content) override;
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private:
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enum { GESTURE_NONE, GESTURE_PAN, GESTURE_PINCH } gesture_state;
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int32_t last_x, last_y, last_scale;
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GHOST_TTrackpadInfo accumulated_values;
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uint16_t dpi;
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DIRECTMANIPULATION_STATUS dm_status;
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friend class GHOST_DirectManipulationHelper;
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};
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class GHOST_DirectManipulationHelper {
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public:
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/*
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* Creates a GHOST_DirectManipulationHelper for the provided window.
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* \param hWnd: The window receiving DirectManipulation events.
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* \param dpi: The current DPI.
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* \return Pointer to the new GHOST_DirectManipulationHelper if created, nullptr if there was an
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* error.
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*/
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static GHOST_DirectManipulationHelper *create(HWND hWnd, uint16_t dpi);
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~GHOST_DirectManipulationHelper();
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/*
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* Drives the DirectManipulation context.
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* DirectManipulation's intended use is to tie user input into DirectComposition's compositor
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* scaling and translating. We are not using DirectComposition and therefore must drive
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* DirectManipulation manually.
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*/
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void update();
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/*
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* Sets pointer in contact with the DirectManipulation context.
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* \param pointerId: ID of the pointer in contact.
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*/
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void onPointerHitTest(UINT32 pointerId);
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/*
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* Updates DPI information for touchpad scaling.
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* \param dpi: The new DPI.
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*/
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void setDPI(uint16_t dpi);
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/*
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* Retrieves trackpad input.
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* \return The accumulated trackpad translation and scale since last call.
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*/
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GHOST_TTrackpadInfo getTrackpadInfo();
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private:
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GHOST_DirectManipulationHelper(
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HWND hWnd,
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Microsoft::WRL::ComPtr<IDirectManipulationManager> directManipulationManager,
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Microsoft::WRL::ComPtr<IDirectManipulationUpdateManager> directManipulationUpdateManager,
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Microsoft::WRL::ComPtr<IDirectManipulationViewport> directManipulationViewport,
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Microsoft::WRL::ComPtr<GHOST_DirectManipulationViewportEventHandler>
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directManipulationEventHandler,
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DWORD directManipulationViewportHandlerCookie,
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bool isScrollDirectionInverted);
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/*
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* Retrieves the scroll direction from the registry.
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* \return True if scroll direction is inverted.
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*/
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static bool getScrollDirectionFromReg();
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/*
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* Registers listener for registry scroll direction entry changes.
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*/
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void registerScrollDirectionChangeListener();
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HWND m_hWnd;
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HKEY m_scrollDirectionRegKey;
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HANDLE m_scrollDirectionChangeEvent;
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Microsoft::WRL::ComPtr<IDirectManipulationManager> m_directManipulationManager;
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Microsoft::WRL::ComPtr<IDirectManipulationUpdateManager> m_directManipulationUpdateManager;
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Microsoft::WRL::ComPtr<IDirectManipulationViewport> m_directManipulationViewport;
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Microsoft::WRL::ComPtr<GHOST_DirectManipulationViewportEventHandler>
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m_directManipulationEventHandler;
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DWORD m_directManipulationViewportHandlerCookie;
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bool m_isScrollDirectionInverted;
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};
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