protected override void OnElementPropertyChanged(PropertyChangedEventArgs args)
{
System.Diagnostics.Debug.WriteLine("OnElementPropertyChanged" + args.PropertyName);
var viewGroup = Control as AViews.ViewGroup;
var nativeView = Control as AViews.View;
if (nativeView != null && viewGroup != null && viewGroup.ChildCount > 0)
{
nativeView = viewGroup.GetChildAt(0);
}
if (nativeView == null)
{
return;
}
var info = AccessibilityNodeInfoCompat.Obtain(nativeView);
ViewCompat.OnInitializeAccessibilityNodeInfo(nativeView, info);
System.Diagnostics.Debug.WriteLine(info.ContentDescription);
System.Diagnostics.Debug.WriteLine(nativeView.ContentDescription);
Element.SetValue(
ContentDescriptionEffectProperties.NameAndHelpTextProperty,
info.ContentDescription);
Element.SetValue(
ContentDescriptionEffectProperties.ContentDescriptionProperty,
nativeView.ContentDescription);
}
public override void OnInitializeAccessibilityNodeInfo (View host, AccessibilityNodeInfoCompat info)
{
base.OnInitializeAccessibilityNodeInfo (host, info);
// Note that View.onInitializeAccessibilityNodeInfo was introduced in
// ICS and we would like to tweak a bit the text that is reported to
// accessibility services via the AccessibilityNodeInfo.
info.Text = parent.Context.GetString (Resource.String.accessibility_delegate_custom_text_added);
}
public override void OnInitializeAccessibilityNodeInfo(PlatformView host, AccessibilityNodeInfoCompat info)
{
base.OnInitializeAccessibilityNodeInfo(host, info);
if (Handler?.VirtualView is View v)
{
v.UpdateSemanticNodeInfo(info);
}
}
public override void OnInitializeAccessibilityNodeInfo(PlatformView host, AccessibilityNodeInfoCompat info)
{
base.OnInitializeAccessibilityNodeInfo(host, info);
if (Handler?.PlatformView is PlatformView platformView && Handler?.VirtualView != null)
{
platformView.UpdateSemanticNodeInfo(Handler.VirtualView, info);
}
}
public override void OnInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info)
{
base.OnInitializeAccessibilityNodeInfo(host, info);
// Note that View.onInitializeAccessibilityNodeInfo was introduced in
// ICS and we would like to tweak a bit the text that is reported to
// accessibility services via the AccessibilityNodeInfo.
info.Text = parent.Context.GetString(Resource.String.accessibility_delegate_custom_text_added);
}
public override void OnInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info)
{
base.OnInitializeAccessibilityNodeInfo(host, info);
// Provide information about what action the user can take
AccessibilityNodeInfoCompat.AccessibilityActionCompat action = new AccessibilityNodeInfoCompat.AccessibilityActionCompat(
AccessibilityNodeInfoCompat.ActionClick,
host.Resources.GetString(Resource.String.condition_results_accessibility_action));
info.AddAction(action);
// Update the selected state
info.Checkable = true;
info.Checked = ((ConditionResultView)host).Highlighted;
}
public override void OnInitializeAccessibilityNodeInfo(global::Android.Views.View host, AccessibilityNodeInfoCompat info)
{
base.OnInitializeAccessibilityNodeInfo(host, info);
if (Element == null)
{
return;
}
if (info == null)
{
return;
}
string?newText = null;
string?newContentDescription = null;
var desc = SemanticEffect.GetDescription(Element);
if (!string.IsNullOrEmpty(desc))
{
// Edit Text fields won't read anything for the content description
if (host is EditText et)
{
if (!string.IsNullOrEmpty(et.Text))
{
newText = $"{desc}, {et.Text}";
}
else
{
newText = $"{desc}";
}
}
else
{
newContentDescription = desc;
}
}
var hint = SemanticEffect.GetHint(Element);
if (!string.IsNullOrEmpty(hint))
{
// info HintText won't read anything back when using TalkBack pre API 26
if (XCT.SdkInt >= (int)BuildVersionCodes.O)
{
info.HintText = hint;
if (host is EditText)
{
info.ShowingHintText = false;
}
}
else
{
if (host is EditText et)
{
newText = newText ?? et.Text;
newText = $"{newText}, {hint}";
}
else if (host is TextView tv)
{
if (newContentDescription != null)
{
newText = $"{newContentDescription}, {hint}";
}
else if (!string.IsNullOrEmpty(tv.Text))
{
newText = $"{tv.Text}, {hint}";
}
else
{
newText = $"{hint}";
}
}
else
{
if (newContentDescription != null)
{
newText = $"{newContentDescription}, {hint}";
}
else
{
newText = $"{hint}";
}
}
newContentDescription = null;
}
}
if (!string.IsNullOrWhiteSpace(newContentDescription))
{
info.ContentDescription = newContentDescription;
}
if (!string.IsNullOrWhiteSpace(newText))
{
info.Text = newText;
}
}
public override void OnInitializeAccessibilityNodeInfo(PlatformView host, AccessibilityNodeInfoCompat info)
{
_originalDelegate.OnInitializeAccessibilityNodeInfo(host, info);
}
public override void OnInitializeAccessibilityNodeInfo(global::Android.Views.View host, AccessibilityNodeInfoCompat info)
{
base.OnInitializeAccessibilityNodeInfo(host, info);
if (Element == null)
{
return;
}
if (info == null)
{
return;
}
var hint = SemanticEffect.GetHint(Element);
if (!string.IsNullOrEmpty(hint))
{
info.HintText = hint;
if (host is EditText)
{
info.ShowingHintText = false;
}
}
var desc = SemanticEffect.GetDescription(Element);
if (!string.IsNullOrEmpty(desc))
{
info.ContentDescription = desc;
}
}
