52 строки
1.4 KiB
C#
52 строки
1.4 KiB
C#
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using System;
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using Windows.UI.Xaml.Controls;
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using Windows.UI.Xaml.Media;
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namespace Xamarin.Forms.Platform.UWP
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{
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internal class FormsCancelButton : Windows.UI.Xaml.Controls.Button
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{
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TextBlock _cancelButtonGlyph;
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Border _cancelButtonBackground;
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public Brush ForegroundBrush
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{
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get => _cancelButtonGlyph.Foreground;
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set => _cancelButtonGlyph.Foreground = value;
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}
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public Brush BackgroundBrush
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{
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get => _cancelButtonBackground.Background;
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set => _cancelButtonBackground.Background = value;
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}
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public bool IsReady { get; private set; }
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public event EventHandler ReadyChanged;
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protected override void OnApplyTemplate()
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{
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base.OnApplyTemplate();
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_cancelButtonGlyph = (TextBlock)GetTemplateChild("GlyphElement");
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_cancelButtonBackground = (Border)GetTemplateChild("BorderElement");
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if (_cancelButtonGlyph != null && _cancelButtonBackground != null)
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{
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// The SearchBarRenderer needs to be able to check whether we're ready to have the colors set
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// (we won't be until the first time the button actually appears, which requires the search bar
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// to be focused and have text in it)
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IsReady = true;
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// And we need to inform the SearchBarRenderer of this so it can run the button color update method
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OnReadyChanged();
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}
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}
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protected virtual void OnReadyChanged()
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{
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ReadyChanged?.Invoke(this, EventArgs.Empty);
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}
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}
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}
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