diff options
Diffstat (limited to 'Xamarin.Forms.Platform.WinRT.Tablet/SearchBarRenderer.cs')
| -rw-r--r-- | Xamarin.Forms.Platform.WinRT.Tablet/SearchBarRenderer.cs | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.WinRT.Tablet/SearchBarRenderer.cs b/Xamarin.Forms.Platform.WinRT.Tablet/SearchBarRenderer.cs new file mode 100644 index 00000000..de713a91 --- /dev/null +++ b/Xamarin.Forms.Platform.WinRT.Tablet/SearchBarRenderer.cs @@ -0,0 +1,165 @@ +using System.ComponentModel; +using Windows.UI.Xaml.Controls; +using Windows.UI.Xaml.Media; + +namespace Xamarin.Forms.Platform.WinRT +{ + public class SearchBarRenderer + : ViewRenderer<SearchBar, FormsSearchBox> + { + Brush _defaultPlaceholderColorBrush; + Brush _defaultTextColorBrush; + + bool _fontApplied; + + FormsTextBox _queryTextBox; + + protected override void OnElementChanged(ElementChangedEventArgs<SearchBar> e) + { + if (e.NewElement != null) + { + if (Control == null) + { + SetNativeControl(new FormsSearchBox()); + Control.QuerySubmitted += OnQuerySubmitted; + Control.QueryChanged += OnQueryChanged; + Control.Loaded += (sender, args) => + { + _queryTextBox = Control.GetFirstDescendant<FormsTextBox>(); + UpdateTextColor(); + UpdatePlaceholderColor(); + }; + } + + UpdateText(); + UpdatePlaceholder(); + UpdateFont(); + UpdateAlignment(); + UpdatePlaceholderColor(); + UpdateTextColor(); + } + + base.OnElementChanged(e); + } + + protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e) + { + base.OnElementPropertyChanged(sender, e); + + if (e.PropertyName == SearchBar.TextProperty.PropertyName) + UpdateText(); + else if (e.PropertyName == SearchBar.PlaceholderProperty.PropertyName) + UpdatePlaceholder(); + else if (e.PropertyName == SearchBar.FontAttributesProperty.PropertyName) + UpdateFont(); + else if (e.PropertyName == SearchBar.FontFamilyProperty.PropertyName) + UpdateFont(); + else if (e.PropertyName == SearchBar.FontSizeProperty.PropertyName) + UpdateFont(); + else if (e.PropertyName == SearchBar.HorizontalTextAlignmentProperty.PropertyName) + UpdateAlignment(); + else if (e.PropertyName == SearchBar.PlaceholderColorProperty.PropertyName) + UpdatePlaceholderColor(); + else if (e.PropertyName == SearchBar.TextColorProperty.PropertyName) + UpdateTextColor(); + } + + void OnQuerySubmitted(SearchBox sender, SearchBoxQuerySubmittedEventArgs e) + { + Element.OnSearchButtonPressed(); + } + + void UpdatePlaceholder() + { + Control.PlaceholderText = Element.Placeholder ?? string.Empty; + } + + void UpdateFont() + { + if (Control == null) + return; + + var searchBar = Element; + + if (searchBar == null) + return; + + var searchBarIsDefault = searchBar.FontFamily == null && + searchBar.FontSize == Device.GetNamedSize(NamedSize.Default, typeof (SearchBar), true) && + searchBar.FontAttributes == FontAttributes.None; + + if (searchBarIsDefault && !_fontApplied) + return; + + if (searchBarIsDefault) + { + Control.ClearValue(Windows.UI.Xaml.Controls.Control.FontStyleProperty); + Control.ClearValue(Windows.UI.Xaml.Controls.Control.FontSizeProperty); + Control.ClearValue(Windows.UI.Xaml.Controls.Control.FontFamilyProperty); + Control.ClearValue(Windows.UI.Xaml.Controls.Control.FontWeightProperty); + Control.ClearValue(Windows.UI.Xaml.Controls.Control.FontStretchProperty); + } + else + Control.ApplyFont(searchBar); + + _fontApplied = true; + } + + void OnQueryChanged(SearchBox sender, SearchBoxQueryChangedEventArgs e) + { + ((IElementController)Element).SetValueFromRenderer(SearchBar.TextProperty, e.QueryText); + } + + void UpdateText() + { + Control.QueryText = Element.Text ?? string.Empty; + } + + void UpdateAlignment() + { + Control.HorizontalTextAlignment = Element.HorizontalTextAlignment.ToNativeTextAlignment(); + } + + void UpdateTextColor() + { + if (_queryTextBox == null) + return; + + var textColor = Element.TextColor; + + if (textColor.IsDefault) + { + if (_defaultTextColorBrush == null) + return; + + _queryTextBox.Foreground = _defaultTextColorBrush; + } + + if (_defaultTextColorBrush == null) + _defaultTextColorBrush = _queryTextBox.Foreground; + + _queryTextBox.Foreground = textColor.ToBrush(); + } + + void UpdatePlaceholderColor() + { + if (_queryTextBox == null) + return; + + var placeholderColor = Element.PlaceholderColor; + + if (placeholderColor.IsDefault) + { + if (_defaultPlaceholderColorBrush == null) + return; + + _queryTextBox.PlaceholderForegroundBrush = _defaultPlaceholderColorBrush; + } + + if (_defaultPlaceholderColorBrush == null) + _defaultPlaceholderColorBrush = _queryTextBox.PlaceholderForegroundBrush; + + _queryTextBox.PlaceholderForegroundBrush = placeholderColor.ToBrush(); + } + } +}
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