diff options
Diffstat (limited to 'Xamarin.Forms.Platform.iOS/Renderers/EntryRenderer.cs')
| -rw-r--r-- | Xamarin.Forms.Platform.iOS/Renderers/EntryRenderer.cs | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.iOS/Renderers/EntryRenderer.cs b/Xamarin.Forms.Platform.iOS/Renderers/EntryRenderer.cs new file mode 100644 index 00000000..734a56be --- /dev/null +++ b/Xamarin.Forms.Platform.iOS/Renderers/EntryRenderer.cs @@ -0,0 +1,184 @@ +using System; +using System.Drawing; +using System.Runtime.Remoting.Channels; +using System.ComponentModel; +#if __UNIFIED__ +using UIKit; + +#else +using MonoTouch.UIKit; +#endif + +namespace Xamarin.Forms.Platform.iOS +{ + public class EntryRenderer : ViewRenderer<Entry, UITextField> + { + UIColor _defaultTextColor; + + public EntryRenderer() + { + Frame = new RectangleF(0, 20, 320, 40); + } + + protected override void Dispose(bool disposing) + { + if (disposing) + { + if (Control != null) + { + Control.EditingDidBegin -= OnEditingBegan; + Control.EditingChanged -= OnEditingChanged; + Control.EditingDidEnd -= OnEditingEnded; + } + } + + base.Dispose(disposing); + } + + protected override void OnElementChanged(ElementChangedEventArgs<Entry> e) + { + base.OnElementChanged(e); + + var textField = Control; + + if (Control == null) + { + SetNativeControl(textField = new UITextField(RectangleF.Empty)); + + _defaultTextColor = textField.TextColor; + textField.BorderStyle = UITextBorderStyle.RoundedRect; + + textField.EditingChanged += OnEditingChanged; + + textField.ShouldReturn = OnShouldReturn; + + textField.EditingDidBegin += OnEditingBegan; + textField.EditingDidEnd += OnEditingEnded; + } + + if (e.NewElement != null) + { + UpdatePlaceholder(); + UpdatePassword(); + UpdateText(); + UpdateColor(); + UpdateFont(); + UpdateKeyboard(); + UpdateAlignment(); + } + } + + protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e) + { + if (e.PropertyName == Entry.PlaceholderProperty.PropertyName || e.PropertyName == Entry.PlaceholderColorProperty.PropertyName) + UpdatePlaceholder(); + else if (e.PropertyName == Entry.IsPasswordProperty.PropertyName) + UpdatePassword(); + else if (e.PropertyName == Entry.TextProperty.PropertyName) + UpdateText(); + else if (e.PropertyName == Entry.TextColorProperty.PropertyName) + UpdateColor(); + else if (e.PropertyName == Xamarin.Forms.InputView.KeyboardProperty.PropertyName) + UpdateKeyboard(); + else if (e.PropertyName == Entry.HorizontalTextAlignmentProperty.PropertyName) + UpdateAlignment(); + else if (e.PropertyName == Entry.FontAttributesProperty.PropertyName) + UpdateFont(); + else if (e.PropertyName == Entry.FontFamilyProperty.PropertyName) + UpdateFont(); + else if (e.PropertyName == Entry.FontSizeProperty.PropertyName) + UpdateFont(); + else if (e.PropertyName == VisualElement.IsEnabledProperty.PropertyName) + { + UpdateColor(); + UpdatePlaceholder(); + } + + base.OnElementPropertyChanged(sender, e); + } + + void OnEditingBegan(object sender, EventArgs e) + { + ((IElementController)Element).SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, true); + } + + void OnEditingChanged(object sender, EventArgs eventArgs) + { + ((IElementController)Element).SetValueFromRenderer(Entry.TextProperty, Control.Text); + } + + void OnEditingEnded(object sender, EventArgs e) + { + ((IElementController)Element).SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, false); + } + + bool OnShouldReturn(UITextField view) + { + Control.ResignFirstResponder(); + Element.SendCompleted(); + return true; + } + + void UpdateAlignment() + { + Control.TextAlignment = Element.HorizontalTextAlignment.ToNativeTextAlignment(); + } + + void UpdateColor() + { + var textColor = Element.TextColor; + + if (textColor.IsDefault || !Element.IsEnabled) + Control.TextColor = _defaultTextColor; + else + Control.TextColor = textColor.ToUIColor(); + } + + void UpdateFont() + { + Control.Font = Element.ToUIFont(); + } + + void UpdateKeyboard() + { + Control.ApplyKeyboard(Element.Keyboard); + } + + void UpdatePassword() + { + if (Element.IsPassword && Control.IsFirstResponder) + { + Control.Enabled = false; + Control.SecureTextEntry = true; + Control.Enabled = Element.IsEnabled; + Control.BecomeFirstResponder(); + } + else + Control.SecureTextEntry = Element.IsPassword; + } + + void UpdatePlaceholder() + { + var formatted = (FormattedString)Element.Placeholder; + + if (formatted == null) + return; + + var targetColor = Element.PlaceholderColor; + + // Placeholder default color is 70% gray + // https://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UITextField_Class/index.html#//apple_ref/occ/instp/UITextField/placeholder + + var color = Element.IsEnabled && !targetColor.IsDefault ? targetColor : ColorExtensions.SeventyPercentGrey.ToColor(); + + Control.AttributedPlaceholder = formatted.ToAttributed(Element, color); + } + + void UpdateText() + { + // ReSharper disable once RedundantCheckBeforeAssignment + if (Control.Text != Element.Text) + Control.Text = Element.Text; + } + } +}
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