diff options
Diffstat (limited to 'Xamarin.Forms.Platform.Android/Renderers/EditorRenderer.cs')
| -rw-r--r-- | Xamarin.Forms.Platform.Android/Renderers/EditorRenderer.cs | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.Android/Renderers/EditorRenderer.cs b/Xamarin.Forms.Platform.Android/Renderers/EditorRenderer.cs new file mode 100644 index 00000000..14078abc --- /dev/null +++ b/Xamarin.Forms.Platform.Android/Renderers/EditorRenderer.cs @@ -0,0 +1,140 @@ +using System.ComponentModel; +using Android.Content.Res; +using Android.Text; +using Android.Util; +using Android.Views; +using Java.Lang; + +namespace Xamarin.Forms.Platform.Android +{ + public class EditorRenderer : ViewRenderer<Editor, EditorEditText>, ITextWatcher + { + ColorStateList _defaultColors; + + public EditorRenderer() + { + AutoPackage = false; + } + + void ITextWatcher.AfterTextChanged(IEditable s) + { + } + + void ITextWatcher.BeforeTextChanged(ICharSequence s, int start, int count, int after) + { + } + + void ITextWatcher.OnTextChanged(ICharSequence s, int start, int before, int count) + { + if (string.IsNullOrEmpty(Element.Text) && s.Length() == 0) + return; + + if (Element.Text != s.ToString()) + ((IElementController)Element).SetValueFromRenderer(Editor.TextProperty, s.ToString()); + } + + protected override void OnElementChanged(ElementChangedEventArgs<Editor> e) + { + base.OnElementChanged(e); + + HandleKeyboardOnFocus = true; + + EditorEditText edit = Control; + if (edit == null) + { + edit = new EditorEditText(Context); + + SetNativeControl(edit); + edit.AddTextChangedListener(this); + edit.OnBackKeyboardPressed += (sender, args) => + { + Element.SendCompleted(); + edit.ClearFocus(); + }; + } + + edit.SetSingleLine(false); + edit.Gravity = GravityFlags.Top; + edit.SetHorizontallyScrolling(false); + + UpdateText(); + UpdateInputType(); + UpdateTextColor(); + UpdateFont(); + } + + protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e) + { + if (e.PropertyName == Editor.TextProperty.PropertyName) + UpdateText(); + else if (e.PropertyName == InputView.KeyboardProperty.PropertyName) + UpdateInputType(); + else if (e.PropertyName == Editor.TextColorProperty.PropertyName) + UpdateTextColor(); + else if (e.PropertyName == Editor.FontAttributesProperty.PropertyName) + UpdateFont(); + else if (e.PropertyName == Editor.FontFamilyProperty.PropertyName) + UpdateFont(); + else if (e.PropertyName == Editor.FontSizeProperty.PropertyName) + UpdateFont(); + + base.OnElementPropertyChanged(sender, e); + } + + internal override void OnNativeFocusChanged(bool hasFocus) + { + if (Element.IsFocused && !hasFocus) // Editor has requested an unfocus, fire completed event + Element.SendCompleted(); + } + + void UpdateFont() + { + Control.Typeface = Element.ToTypeface(); + Control.SetTextSize(ComplexUnitType.Sp, (float)Element.FontSize); + } + + void UpdateInputType() + { + Editor model = Element; + EditorEditText edit = Control; + edit.InputType = model.Keyboard.ToInputType() | InputTypes.TextFlagMultiLine; + } + + void UpdateText() + { + string newText = Element.Text ?? ""; + + if (Control.Text == newText) + return; + + Control.Text = newText; + Control.SetSelection(newText.Length); + } + + void UpdateTextColor() + { + if (Element.TextColor.IsDefault) + { + if (_defaultColors == null) + { + // This control has always had the default colors; nothing to update + return; + } + + // This control is being set back to the default colors + Control.SetTextColor(_defaultColors); + } + else + { + if (_defaultColors == null) + { + // Keep track of the default colors so we can return to them later + // and so we can preserve the default disabled color + _defaultColors = Control.TextColors; + } + + Control.SetTextColor(Element.TextColor.ToAndroidPreserveDisabled(_defaultColors)); + } + } + } +}
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