public void AddTargetMakeDirty()
{
using (var ctrl = new UIControl()) {
ctrl.AddTarget((a, b) => { }, UIControlEvent.EditingDidBegin);
Assert.IsTrue((TestRuntime.GetFlags(ctrl) & 0x8) /* RegisteredToggleRef */ == 0x8, "RegisteredToggleRef");
}
}
public static IDisposable BindToTarget(this ICommand This, UIControl control, UIControlEvent events)
{
var ev = new EventHandler((o, e) => {
if (!This.CanExecute(null))
{
return;
}
This.Execute(null);
});
var cech = new EventHandler((o, e) => {
var canExecute = This.CanExecute(null);
control.Enabled = canExecute;
});
This.CanExecuteChanged += cech;
control.AddTarget(ev, events);
control.Enabled = This.CanExecute(null);
return(Disposable.Create(() => {
control.RemoveTarget(ev, events);
This.CanExecuteChanged -= cech;
}));
}
public void AddTargetTable()
{
const int items = 100;
var handles = new GCHandle [items];
var handler = new EventHandler(delegate(object sender, EventArgs e) {
});
for (int i = 0; i < items; i++)
{
var ctrl = new UIControl();
ctrl.AddTarget(handler, UIControlEvent.EditingChanged);
handles [i] = GCHandle.Alloc(ctrl, GCHandleType.Weak);
}
GC.Collect();
// If at least one object was collected, then we know the static ConditionalWeakTable
// of object -> event handlers doesn't keep strong references.
var any_collected = false;
for (int i = 0; i < items; i++)
{
if (handles [i].Target == null)
{
any_collected = true;
}
handles [i].Free();
}
Assert.IsTrue(any_collected, "Nothing collected");
}
internal ControlTarget(UIControl control, UIControlEvent controlEvent, Action <UIControl> callback)
{
_control = control;
_controlEvent = controlEvent;
_callback = callback;
control.AddTarget(EventHandler, controlEvent);
}
public static IDisposable BindToTarget(this ICommand This, UIControl control, UIControlEvent events)
{
var ev = new EventHandler((o,e) => {
if (!This.CanExecute(null)) return;
This.Execute(null);
});
control.AddTarget(ev, events);
return Disposable.Create(() => control.RemoveTarget(ev, events));
}
public static IDisposable BindToTarget(this ICommand This, UIControl control, UIControlEvent events)
{
var ev = new EventHandler((o, e) => {
if (!This.CanExecute(null))
{
return;
}
This.Execute(null);
});
control.AddTarget(ev, events);
return(Disposable.Create(() => control.RemoveTarget(ev, events)));
}
public static IDisposable BindToTarget(this ICommand This, UIControl control, UIControlEvent events)
{
var ev = new EventHandler((o,e) => {
if (!This.CanExecute(null)) return;
This.Execute(null);
});
var cech = new EventHandler((o, e) => {
var canExecute = This.CanExecute(null);
control.Enabled = canExecute;
});
This.CanExecuteChanged += cech;
control.AddTarget(ev, events);
control.Enabled = This.CanExecute(null);
return Disposable.Create(() => {
control.RemoveTarget(ev, events);
This.CanExecuteChanged -= cech;
});
}
/// <summary>
/// Binds the <see cref="ICommand"/> to target <see cref="UIControl"/>.
/// </summary>
/// <param name="item">The command to bind to.</param>
/// <param name="control">The control.</param>
/// <param name="events">The events.</param>
/// <returns>A disposable.</returns>
public static IDisposable BindToTarget(this ICommand item, UIControl control, UIControlEvent events)
{
if (item is null)
{
throw new ArgumentNullException(nameof(item));
}
if (control is null)
{
throw new ArgumentNullException(nameof(control));
}
var ev = new EventHandler((o, e) =>
{
if (!item.CanExecute(null))
{
return;
}
item.Execute(null);
});
var cech = new EventHandler((o, e) =>
{
control.Enabled = item.CanExecute(null);
});
item.CanExecuteChanged += cech;
control.AddTarget(ev, events);
control.Enabled = item.CanExecute(null);
return(Disposable.Create(() =>
{
control.RemoveTarget(ev, events);
item.CanExecuteChanged -= cech;
}));
}
