Ooui-tws-port/Ooui.Forms/Renderers/SearchBarRenderer.cs

131 lines
3.9 KiB
C#

using Ooui.Forms.Extensions;
using System;
using System.ComponentModel;
using Xamarin.Forms;
namespace Ooui.Forms.Renderers
{
public class SearchBarRenderer : ViewRenderer<SearchBar, Div>
{
Input _searchBar;
Button _searchButton;
bool _disposed;
IElementController ElementController => Element as IElementController;
public override SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
{
var text = Element.Text;
if (text == null || text.Length == 0)
{
text = Element.Placeholder;
}
Size size;
if (text == null || text.Length == 0)
{
size = new Size(Element.FontSize * 0.25, Element.FontSize);
}
else
{
size = text.MeasureSize(Element.FontFamily, Element.FontSize, Element.FontAttributes);
}
size = new Size(size.Width, size.Height * 1.428 + 14);
return new SizeRequest(size, size);
}
protected override void Dispose(bool disposing)
{
if (_disposed)
return;
_disposed = true;
if (disposing)
{
if (Control != null && _searchBar != null && _searchButton != null)
{
_searchBar.Change -= OnChange;
_searchButton.Click -= OnClick;
}
}
base.Dispose(disposing);
}
protected override void OnElementChanged(ElementChangedEventArgs<SearchBar> e)
{
base.OnElementChanged(e);
if (e.NewElement == null)
return;
if (Control == null)
{
var p = new Div { ClassName = "input-group" };
var pb = new Span { ClassName = "input-group-btn" };
_searchButton = new Button { ClassName = "btn btn-secondary", Text = "Search" };
pb.AppendChild(_searchButton);
_searchBar = new Input
{
ClassName = "form-control",
Type = InputType.Text
};
p.AppendChild(_searchBar);
p.AppendChild(pb);
_searchBar.Change += OnChange;
_searchButton.Click += OnClick;
SetNativeControl(p);
}
UpdateText();
UpdateTextColor();
UpdatePlaceholder();
}
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.PlaceholderColorProperty.PropertyName)
UpdatePlaceholder();
else if(e.PropertyName == SearchBar.TextColorProperty.PropertyName)
UpdateTextColor();
}
void UpdateText()
{
_searchBar.Value = Element.Text;
}
void UpdateTextColor()
{
var textColor = (Xamarin.Forms.Color)Element.GetValue(TimePicker.TextColorProperty);
Control.Style.Color = textColor.ToOouiColor(Xamarin.Forms.Color.Black);
}
void UpdatePlaceholder()
{
_searchBar.Placeholder = Element.Placeholder ?? string.Empty;
}
void OnChange(object sender, EventArgs eventArgs)
{
if (_searchBar.Value != Element.Text)
ElementController.SetValueFromRenderer(SearchBar.TextProperty, _searchBar.Value);
}
void OnClick(object sender, TargetEventArgs e)
{
Element.OnSearchButtonPressed();
}
}
}