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using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
namespace Xamarin.Forms.Platform.WinPhone
{
public class EditorRenderer : ViewRenderer<Editor, TextBox>
{
bool _fontApplied;
protected override void OnElementChanged(ElementChangedEventArgs<Editor> e)
{
base.OnElementChanged(e);
var textBox = new TextBox { VerticalScrollBarVisibility = ScrollBarVisibility.Visible, TextWrapping = TextWrapping.Wrap, AcceptsReturn = true };
SetNativeControl(textBox);
UpdateText();
UpdateInputScope();
UpdateTextColor();
Control.LostFocus += (sender, args) => Element.SendCompleted();
textBox.TextChanged += TextBoxOnTextChanged;
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == Editor.TextProperty.PropertyName)
UpdateText();
else if (e.PropertyName == InputView.KeyboardProperty.PropertyName)
UpdateInputScope();
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();
}
protected override void UpdateBackgroundColor()
{
Control.Background = Element.BackgroundColor == Color.Default ? (Brush)System.Windows.Application.Current.Resources["PhoneTextBoxBrush"] : Element.BackgroundColor.ToBrush();
}
void TextBoxOnTextChanged(object sender, System.Windows.Controls.TextChangedEventArgs textChangedEventArgs)
{
((IElementController)Element).SetValueFromRenderer(Editor.TextProperty, Control.Text);
}
void UpdateFont()
{
if (Control == null)
return;
Editor editor = Element;
bool editorIsDefault = editor.FontFamily == null && editor.FontSize == Device.GetNamedSize(NamedSize.Default, typeof(Editor), true) && editor.FontAttributes == FontAttributes.None;
if (editor == null || (editorIsDefault && !_fontApplied))
return;
if (editorIsDefault)
{
Control.ClearValue(System.Windows.Controls.Control.FontStyleProperty);
Control.ClearValue(System.Windows.Controls.Control.FontSizeProperty);
Control.ClearValue(System.Windows.Controls.Control.FontFamilyProperty);
Control.ClearValue(System.Windows.Controls.Control.FontWeightProperty);
Control.ClearValue(System.Windows.Controls.Control.FontStretchProperty);
}
else
Control.ApplyFont(editor);
_fontApplied = true;
}
void UpdateInputScope()
{
Control.InputScope = Element.Keyboard.ToInputScope();
}
void UpdateText()
{
string newText = Element.Text ?? "";
if (Control.Text == newText)
return;
Control.Text = newText;
Control.SelectionStart = Control.Text.Length;
}
void UpdateTextColor()
{
Color textColor = Element.TextColor;
if (textColor.IsDefault || !Element.IsEnabled)
Control.ClearValue(System.Windows.Controls.Control.ForegroundProperty);
else
Control.Foreground = textColor.ToBrush();
}
}
}
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