Added Forms EditorRenderer

This commit is contained in:
Javier Suárez Ruiz 2017-11-26 18:28:47 +01:00
parent 7c36801d5e
commit 98efd72b61
4 changed files with 170 additions and 0 deletions

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@ -7,6 +7,7 @@ using Xamarin.Forms.Internals;
[assembly: Dependency (typeof (ResourcesProvider))]
[assembly: ExportRenderer (typeof (BoxView), typeof (BoxRenderer))]
[assembly: ExportRenderer (typeof (Button), typeof (ButtonRenderer))]
[assembly: ExportRenderer(typeof(Editor), typeof(EditorRenderer))]
[assembly: ExportRenderer (typeof (Entry), typeof (EntryRenderer))]
[assembly: ExportRenderer (typeof (Label), typeof (LabelRenderer))]

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@ -0,0 +1,124 @@
using Ooui.Forms.Extensions;
using System.ComponentModel;
using System.Diagnostics;
using Xamarin.Forms;
namespace Ooui.Forms.Renderers
{
public class EditorRenderer : ViewRenderer<Editor, Ooui.TextArea>
{
private bool _disposed;
private Ooui.Color _defaultTextColor;
static Size initialSize = Size.Zero;
protected IElementController ElementController => Element as IElementController;
public override SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
{
var size = Element.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)
{
Control.Inputted -= OnEditingChanged;
Control.Changed -= OnEditingEnded;
}
}
base.Dispose(disposing);
}
protected override void OnElementChanged(ElementChangedEventArgs<Editor> e)
{
if (e.NewElement == null)
return;
if (Control == null)
{
SetNativeControl(new Ooui.TextArea());
_defaultTextColor = Colors.Black;
Debug.Assert(Control != null, "Control != null");
Control.Inputted += OnEditingChanged;
Control.Changed += OnEditingEnded;
}
UpdateText();
UpdateTextColor();
UpdateFont();
base.OnElementChanged(e);
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == Editor.TextProperty.PropertyName)
UpdateText();
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();
}
void UpdateText()
{
if (Control.Value != Element.Text)
Control.Value = Element.Text;
}
void UpdateTextColor()
{
var textColor = Element.TextColor;
if (textColor.IsDefault || !Element.IsEnabled)
Control.Style.Color = _defaultTextColor;
else
Control.Style.Color = textColor.ToOouiColor();
}
void UpdateFont()
{
if (initialSize == Size.Zero)
{
var testString = "Tj";
initialSize = testString.MeasureSize(Control.Style);
}
Element.SetStyleFont(Element.FontFamily, Element.FontSize, Element.FontAttributes, Control.Style);
}
private void OnEditingChanged(object sender, TargetEventArgs e)
{
ElementController.SetValueFromRenderer(Editor.TextProperty, Control.Value);
}
private void OnEditingEnded(object sender, TargetEventArgs e)
{
if (Control.Text != Element.Text)
{
ElementController.SetValueFromRenderer(Editor.TextProperty, Control.Text);
}
}
}
}

44
Samples/EditorSample.cs Normal file
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@ -0,0 +1,44 @@
using Ooui;
using Xamarin.Forms;
namespace Samples
{
public class EditorSample : ISample
{
public string Title => "Editor Sample";
public Ooui.Element CreateElement()
{
var panel = new StackLayout();
var titleLabel = new Xamarin.Forms.Label
{
Text = "Editor"
};
panel.Children.Add(titleLabel);
var editor = new Editor();
panel.Children.Add(editor);
var labelEditor = new Xamarin.Forms.Label();
panel.Children.Add(labelEditor);
editor.TextChanged += (sender, args) =>
{
labelEditor.Text = args.NewTextValue;
};
var page = new ContentPage
{
Content = panel
};
return page.GetOouiElement();
}
public void Publish()
{
UI.Publish("/editor", CreateElement);
}
}
}

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@ -30,6 +30,7 @@ namespace Samples
new DrawSample ().Publish ();
new FilesSample ().Publish ();
new DisplayAlertSample ().Publish ();
new EditorSample().Publish();
UI.Present ("/display-alert");