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51 行
1.7 KiB

using System;
using Unity.UIWidgets.foundation;
namespace Unity.UIWidgets.gestures {
public delegate void PointerSignalResolvedCallback(PointerSignalEvent evt);
public class PointerSignalResolver {
PointerSignalResolvedCallback _firstRegisteredCallback;
PointerSignalEvent _currentEvent;
public void register(PointerSignalEvent evt, PointerSignalResolvedCallback callback) {
D.assert(evt != null);
D.assert(callback != null);
D.assert(this._currentEvent == null || this._currentEvent == evt);
if (this._firstRegisteredCallback != null) {
return;
}
this._currentEvent = evt;
this._firstRegisteredCallback = callback;
}
public void resolve(PointerSignalEvent evt) {
if (this._firstRegisteredCallback == null) {
D.assert(this._currentEvent == null);
return;
}
D.assert(this._currentEvent == evt);
try {
this._firstRegisteredCallback(evt);
}
catch (Exception exception) {
UIWidgetsError.reportError(new UIWidgetsErrorDetails(
exception: exception,
library: "gesture library",
context: "while resolving a PointerSignalEvent",
informationCollector: information => {
information.AppendLine("Event: ");
information.AppendFormat(" {0}", evt);
}
)
);
}
this._firstRegisteredCallback = null;
this._currentEvent = null;
}
}
}