wehub-resource-sync
74 lines
2.3 KiB
C#
74 lines
2.3 KiB
C#
using System.Reflection;
|
|
using ImGuiNET;
|
|
|
|
namespace T3.Editor.Gui.UiHelpers;
|
|
|
|
|
|
internal record struct State<T>(Action<T> Enter=null,
|
|
Action<T> Update=null,
|
|
Action<T> Exit=null);
|
|
|
|
|
|
/// <summary>
|
|
/// The state machine is a very bare-bones (no hierarchy or events) implementation
|
|
/// of a state machine that handles activation of <see cref="State"/>s. There can only be one state active.
|
|
/// Most of the update interaction is done in State.Update() overrides.
|
|
/// </summary>
|
|
internal sealed class StateMachine<T>
|
|
{
|
|
public StateMachine( Type statesClass,State<T> defaultState)
|
|
{
|
|
_currentState = defaultState;
|
|
_states = statesClass;
|
|
}
|
|
|
|
public void UpdateAfterDraw(T c)
|
|
{
|
|
_currentState.Update(c);
|
|
}
|
|
|
|
internal void SetState(State<T> newState, T context)
|
|
{
|
|
_currentState.Exit(context);
|
|
_currentState = newState;
|
|
_stateEnterTime = ImGui.GetTime();
|
|
|
|
//var activeCommand = context.MacroCommand != null ? "ActiveCmd:" + context.MacroCommand : string.Empty;
|
|
//Log.Debug($"--> {GetMatchingStateFieldName(typeof( GraphStates), _currentState)} {activeCommand} {context.ActiveItem}");
|
|
_currentState.Enter(context);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Sadly, since states are defined as fields, we need to use reflection to infer their short names...
|
|
/// </summary>
|
|
private string GetStateName(State<T> state)
|
|
{
|
|
|
|
var fields = _states.GetFields( BindingFlags.NonPublic|BindingFlags.Static);
|
|
|
|
foreach (var field in fields)
|
|
{
|
|
if (field.FieldType != typeof(State<T>))
|
|
continue;
|
|
|
|
var fieldValue = (State<T>)field.GetValue(null)!;
|
|
if (fieldValue.Equals(state))
|
|
{
|
|
return field.Name;
|
|
}
|
|
}
|
|
|
|
return string.Empty;
|
|
}
|
|
|
|
private State<T> _currentState;
|
|
public float StateTime => (float) (ImGui.GetTime() - _stateEnterTime);
|
|
private double _stateEnterTime;
|
|
private readonly Type _states;
|
|
public State<T> CurrentState => _currentState;
|
|
|
|
public override string ToString()
|
|
{
|
|
return $"{_states.Name} [{GetStateName(_currentState)}]";
|
|
}
|
|
} |