rename from Pixiview to Gallery
This commit is contained in:
246
Gallery.Android/Renderers/SegmentedControlRenderer.cs
Executable file
246
Gallery.Android/Renderers/SegmentedControlRenderer.cs
Executable file
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using Android.Content;
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using Android.Graphics.Drawables;
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using Android.Views;
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using Android.Widget;
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using Gallery.Droid.Renderers;
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using Gallery.UI;
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using Xamarin.Forms.Platform.Android;
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[assembly: Xamarin.Forms.ExportRenderer(typeof(SegmentedControl), typeof(SegmentedControlRenderer))]
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namespace Gallery.Droid.Renderers
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{
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public class SegmentedControlRenderer : ViewRenderer<SegmentedControl, RadioGroup>
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{
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RadioGroup nativeControl;
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RadioButton _rb;
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readonly Context context;
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public SegmentedControlRenderer(Context context) : base(context)
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{
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this.context = context;
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}
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protected override void OnElementChanged(ElementChangedEventArgs<SegmentedControl> e)
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{
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base.OnElementChanged(e);
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if (Control == null)
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{
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// Instantiate the native control and assign it to the Control property with
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// the SetNativeControl method
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var layoutInflater = LayoutInflater.From(context);
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var view = layoutInflater.Inflate(Resource.Layout.RadioGroup, null);
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nativeControl = (RadioGroup)layoutInflater.Inflate(Resource.Layout.RadioGroup, null);
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var density = context.Resources.DisplayMetrics.Density;
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for (var i = 0; i < Element.Children.Count; i++)
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{
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var o = Element.Children[i];
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var rb = (RadioButton)layoutInflater.Inflate(Resource.Layout.RadioButton, null);
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var width = rb.Paint.MeasureText(o.Text) * density + 0.5f;
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rb.LayoutParameters = new RadioGroup.LayoutParams((int)width, LayoutParams.WrapContent, 1f);
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rb.Text = o.Text;
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if (i == 0)
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rb.SetBackgroundResource(Resource.Drawable.segmented_control_first_background);
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else if (i == Element.Children.Count - 1)
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rb.SetBackgroundResource(Resource.Drawable.segmented_control_last_background);
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else
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rb.SetBackgroundResource(Resource.Drawable.segmented_control_background);
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ConfigureRadioButton(i, rb);
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nativeControl.AddView(rb);
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}
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var option = (RadioButton)nativeControl.GetChildAt(Element.SelectedSegmentIndex);
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if (option != null)
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option.Checked = true;
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SetNativeControl(nativeControl);
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}
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if (e.OldElement != null)
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{
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// Unsubscribe from event handlers and cleanup any resources
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if (nativeControl != null)
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nativeControl.CheckedChange -= NativeControl_ValueChanged;
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}
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if (e.NewElement != null)
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{
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// Configure the control and subscribe to event handlers
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nativeControl.CheckedChange += NativeControl_ValueChanged;
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}
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}
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protected override void OnElementPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
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{
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base.OnElementPropertyChanged(sender, e);
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if (nativeControl == null || Element == null) return;
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switch (e.PropertyName)
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{
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case "Renderer":
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Element?.SendValueChanged();
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break;
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case nameof(SegmentedControl.SelectedSegmentIndex):
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var option = (RadioButton)nativeControl.GetChildAt(Element.SelectedSegmentIndex);
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if (option != null)
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option.Checked = true;
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if (Element.SelectedSegmentIndex < 0)
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{
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var layoutInflater = LayoutInflater.From(context);
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nativeControl = (RadioGroup)layoutInflater.Inflate(Resource.Layout.RadioGroup, null);
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for (var i = 0; i < Element.Children.Count; i++)
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{
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var o = Element.Children[i];
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var rb = (RadioButton)layoutInflater.Inflate(Resource.Layout.RadioButton, null);
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var width = rb.Paint.MeasureText(o.Text);
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rb.LayoutParameters = new RadioGroup.LayoutParams((int)width, LayoutParams.WrapContent, 1f);
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rb.Text = o.Text;
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if (i == 0)
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rb.SetBackgroundResource(Resource.Drawable.segmented_control_first_background);
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else if (i == Element.Children.Count - 1)
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rb.SetBackgroundResource(Resource.Drawable.segmented_control_last_background);
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else
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rb.SetBackgroundResource(Resource.Drawable.segmented_control_background);
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ConfigureRadioButton(i, rb);
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nativeControl.AddView(rb);
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}
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nativeControl.CheckedChange += NativeControl_ValueChanged;
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SetNativeControl(nativeControl);
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}
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Element.SendValueChanged();
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break;
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case nameof(SegmentedControl.TintColor):
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OnPropertyChanged();
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break;
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case nameof(SegmentedControl.IsEnabled):
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OnPropertyChanged();
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break;
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case nameof(SegmentedControl.SelectedTextColor):
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var v = (RadioButton)nativeControl.GetChildAt(Element.SelectedSegmentIndex);
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v.SetTextColor(Element.SelectedTextColor.ToAndroid());
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break;
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}
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}
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void OnPropertyChanged()
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{
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if (nativeControl != null && Element != null)
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{
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for (var i = 0; i < Element.Children.Count; i++)
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{
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var rb = (RadioButton)nativeControl.GetChildAt(i);
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ConfigureRadioButton(i, rb);
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}
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}
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}
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void ConfigureRadioButton(int i, RadioButton rb)
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{
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var textColor = Element.SelectedTextColor;
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if (i == Element.SelectedSegmentIndex)
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{
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rb.SetTextColor(textColor.ToAndroid());
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rb.Paint.FakeBoldText = true;
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_rb = rb;
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}
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else
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{
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var tColor = Element.IsEnabled ?
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textColor.IsDefault ? Element.TintColor.ToAndroid() : textColor.MultiplyAlpha(.6).ToAndroid() :
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Element.DisabledColor.ToAndroid();
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rb.SetTextColor(tColor);
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}
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GradientDrawable selectedShape;
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GradientDrawable unselectedShape;
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var gradientDrawable = (StateListDrawable)rb.Background;
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var drawableContainerState = (DrawableContainer.DrawableContainerState)gradientDrawable.GetConstantState();
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var children = drawableContainerState.GetChildren();
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// Doesnt works on API < 18
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selectedShape = children[0] is GradientDrawable ? (GradientDrawable)children[0] : (GradientDrawable)((InsetDrawable)children[0]).Drawable;
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unselectedShape = children[1] is GradientDrawable ? (GradientDrawable)children[1] : (GradientDrawable)((InsetDrawable)children[1]).Drawable;
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var color = Element.IsEnabled ? Element.TintColor.ToAndroid() : Element.DisabledColor.ToAndroid();
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selectedShape.SetStroke(3, color);
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selectedShape.SetColor(color);
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unselectedShape.SetStroke(3, color);
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rb.Enabled = Element.IsEnabled;
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}
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void NativeControl_ValueChanged(object sender, RadioGroup.CheckedChangeEventArgs e)
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{
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var rg = (RadioGroup)sender;
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if (rg.CheckedRadioButtonId != -1)
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{
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var id = rg.CheckedRadioButtonId;
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var radioButton = rg.FindViewById(id);
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var radioId = rg.IndexOfChild(radioButton);
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var rb = (RadioButton)rg.GetChildAt(radioId);
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var textColor = Element.SelectedTextColor;
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var color = Element.IsEnabled ?
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textColor.IsDefault ? Element.TintColor.ToAndroid() : textColor.MultiplyAlpha(.6).ToAndroid() :
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Element.DisabledColor.ToAndroid();
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if (_rb != null)
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{
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_rb.SetTextColor(color);
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_rb.Paint.FakeBoldText = false;
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}
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rb.SetTextColor(Element.SelectedTextColor.ToAndroid());
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rb.Paint.FakeBoldText = true;
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_rb = rb;
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Element.SelectedSegmentIndex = radioId;
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}
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}
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protected override void Dispose(bool disposing)
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{
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if (nativeControl != null)
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{
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nativeControl.CheckedChange -= NativeControl_ValueChanged;
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nativeControl.Dispose();
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nativeControl = null;
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_rb = null;
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}
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try
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{
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base.Dispose(disposing);
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}
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catch
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{
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return;
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}
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}
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}
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}
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