protected T invokeCallback <T>(string name, RecognizerCallback <T> callback, Func <string> debugReport = null)
{
D.assert(callback != null);
T result = default(T);
try {
D.assert(() => {
if (D.debugPrintRecognizerCallbacksTrace)
{
var report = debugReport != null ? debugReport() : null;
// The 19 in the line below is the width of the prefix used by
// _debugLogDiagnostic in arena.dart.
var prefix = D.debugPrintGestureArenaDiagnostics ? new string(' ', 19) + "❙ " : "";
Debug.LogFormat("{0}this calling {1} callback.{2}",
prefix, name, report.isNotEmpty() ? " " + report : "");
}
return(true);
});
result = callback();
}
catch (Exception ex) {
IEnumerable <DiagnosticsNode> infoCollector()
{
yield return(new StringProperty("Handler", name));
yield return(new DiagnosticsProperty <GestureRecognizer>("Recognizer", this, style: DiagnosticsTreeStyle.errorProperty));
}
UIWidgetsError.reportError(new UIWidgetsErrorDetails(
exception: ex,
library: "gesture",
context: new ErrorDescription("while handling a gesture"),
informationCollector: infoCollector
));
}
return(result);
}
protected T invokeCallback <T>(string name, RecognizerCallback <T> callback, Func <string> debugReport = null)
{
D.assert(callback != null);
T result = default(T);
try {
D.assert(() => {
if (D.debugPrintRecognizerCallbacksTrace)
{
var report = debugReport != null ? debugReport() : null;
// The 19 in the line below is the width of the prefix used by
// _debugLogDiagnostic in arena.dart.
var prefix = D.debugPrintGestureArenaDiagnostics ? new string(' ', 19) + "❙ " : "";
Debug.LogFormat("{0}this calling {1} callback.{2}",
prefix, name, report.isNotEmpty() ? " " + report : "");
}
return(true);
});
result = callback();
}
catch (Exception ex) {
UIWidgetsError.reportError(new UIWidgetsErrorDetails(
exception: ex,
library: "gesture",
context: "while handling a gesture",
informationCollector: information => {
information.AppendLine("Handler: " + name);
information.AppendLine("Recognizer:");
information.AppendLine(" " + this);
}
));
}
return(result);
}
