Steven Kirk
4 years ago
14 changed files with 322 additions and 72 deletions
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using System; |
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using Avalonia.Input; |
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using Avalonia.Input.Raw; |
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using Avalonia.Logging; |
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using static Avalonia.LinuxFramebuffer.Input.LibInput.LibInputNativeUnsafeMethods; |
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namespace Avalonia.LinuxFramebuffer.Input.LibInput; |
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public partial class LibInputBackend |
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{ |
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private MouseDevice _mouse = new MouseDevice(); |
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private Point _mousePosition; |
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private const string Pointer = LibInput + "/" + nameof(Pointer); |
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private void HandlePointer(IntPtr ev, LibInputEventType type) |
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{ |
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var modifiers = RawInputModifiers.None; //TODO: support input modifiers
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var pev = libinput_event_get_pointer_event(ev); |
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var info = _screen.ScaledSize; |
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var ts = libinput_event_pointer_get_time_usec(pev) / 1000; |
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switch (type) |
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{ |
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case LibInputEventType.LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE: |
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_mousePosition = new Point(libinput_event_pointer_get_absolute_x_transformed(pev, (int)info.Width), |
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libinput_event_pointer_get_absolute_y_transformed(pev, (int)info.Height)); |
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ScheduleInput(new RawPointerEventArgs(_mouse, ts, _inputRoot, RawPointerEventType.Move, _mousePosition, |
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modifiers)); |
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break; |
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case LibInputEventType.LIBINPUT_EVENT_POINTER_BUTTON: |
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{ |
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var button = (EvKey)libinput_event_pointer_get_button(pev); |
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var buttonState = libinput_event_pointer_get_button_state(pev); |
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RawPointerEventArgs evnt = button switch |
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{ |
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EvKey.BTN_LEFT when buttonState == 1 |
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=> new(_mouse, ts, _inputRoot, RawPointerEventType.LeftButtonDown, _mousePosition, modifiers), |
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EvKey.BTN_LEFT when buttonState == 0 |
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=> new(_mouse, ts, _inputRoot, RawPointerEventType.LeftButtonUp, _mousePosition, modifiers), |
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EvKey.BTN_RIGHT when buttonState == 1 |
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=> new(_mouse, ts, _inputRoot, RawPointerEventType.RightButtonUp, _mousePosition, modifiers), |
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EvKey.BTN_RIGHT when buttonState == 2 |
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=> new(_mouse, ts, _inputRoot, RawPointerEventType.RightButtonDown, _mousePosition, modifiers), |
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EvKey.BTN_MIDDLE when buttonState == 1 |
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=> new(_mouse, ts, _inputRoot, RawPointerEventType.MiddleButtonDown, _mousePosition, modifiers), |
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EvKey.BTN_MIDDLE when buttonState == 2 |
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=> new(_mouse, ts, _inputRoot, RawPointerEventType.MiddleButtonUp, _mousePosition, modifiers), |
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_ => default, |
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}; |
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if (evnt is not null) |
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{ |
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ScheduleInput(evnt); |
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} |
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else |
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{ |
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Logger.TryGet(LogEventLevel.Warning, Pointer) |
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?.Log(this, $"The button {button} is not associated"); |
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} |
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} |
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break; |
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// Backward compatibility with low-res wheel
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case LibInputEventType.LIBINPUT_EVENT_POINTER_AXIS: |
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{ |
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var sourceAxis = libinput_event_pointer_get_axis_source(pev); |
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switch (sourceAxis) |
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{ |
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case LibInputPointerAxisSource.LIBINPUT_POINTER_AXIS_SOURCE_WHEEL: |
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{ |
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var value = libinput_event_pointer_get_axis_value_discrete(pev, |
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LibInputPointerAxis.LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL); |
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ScheduleInput(new RawMouseWheelEventArgs(_mouse |
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, ts |
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, _inputRoot |
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, _mousePosition |
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, new Vector(0, -value) |
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, modifiers)); |
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} |
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break; |
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case LibInputPointerAxisSource.LIBINPUT_POINTER_AXIS_SOURCE_FINGER: |
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case LibInputPointerAxisSource.LIBINPUT_POINTER_AXIS_SOURCE_CONTINUOUS: |
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case LibInputPointerAxisSource.LIBINPUT_POINTER_AXIS_SOURCE_WHEEL_TILT: |
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default: |
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Logger.TryGet(LogEventLevel.Debug, Pointer) |
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?.Log(this, $"The pointer axis {sourceAxis} is not managed."); |
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break; |
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} |
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} |
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break; |
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// Hi-Res wheel
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case LibInputEventType.LIBINPUT_EVENT_POINTER_SCROLL_WHEEL: |
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{ |
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var value = new Vector(0, |
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-libinput_event_pointer_get_scroll_value_v120(pev, |
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LibInputPointerAxis.LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL) / 120); |
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ScheduleInput(new RawMouseWheelEventArgs(_mouse |
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, ts |
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, _inputRoot |
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, _mousePosition |
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, value |
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, modifiers)); |
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} |
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break; |
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default: |
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Logger.TryGet(LogEventLevel.Warning, Pointer) |
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?.Log(this, $"The pointer event {type} is not mapped."); |
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break; |
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} |
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} |
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} |
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