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Properly resize images when the window size changes

This commit is contained in:
Troy Stanger 2018-11-14 12:41:34 -06:00
parent 915f96fd29
commit 5d8d1f4be1
1 changed files with 20 additions and 5 deletions
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25
Ooui.Forms/Renderers/ImageRenderer.cs
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@ -9,6 +9,8 @@ namespace Ooui.Forms.Renderers
public class ImageRenderer : ViewRenderer<Xamarin.Forms.Image, Ooui.Image> public class ImageRenderer : ViewRenderer<Xamarin.Forms.Image, Ooui.Image>
{ {
bool _isDisposed; bool _isDisposed;
double ClientHeight = -1;
double ClientWidth = -1;
protected override void Dispose (bool disposing) protected override void Dispose (bool disposing)
{ {
@ -50,25 +52,38 @@ namespace Ooui.Forms.Renderers
else if (e.PropertyName == Xamarin.Forms.Image.IsOpaqueProperty.PropertyName) else if (e.PropertyName == Xamarin.Forms.Image.IsOpaqueProperty.PropertyName)
SetOpacity (); SetOpacity ();
else if (e.PropertyName == Xamarin.Forms.Image.AspectProperty.PropertyName) else if (e.PropertyName == Xamarin.Forms.Image.AspectProperty.PropertyName)
SetAspect (); SetAspect();
else if (e.PropertyName == VisualElement.WidthProperty.PropertyName)
SetDimensions ();
} }
void OnLoad(object sender, EventArgs eventArgs) void OnLoad(object sender, EventArgs eventArgs)
{ {
var args = (TargetEventArgs)eventArgs; var args = (TargetEventArgs)eventArgs;
ClientHeight = args.ClientHeight;
ClientWidth = args.ClientWidth;
SetDimensions();
}
void SetDimensions()
{
var b = Element.Bounds; var b = Element.Bounds;
double scale = 1; double scale = 1;
if (ClientWidth < 0 || ClientHeight < 0)
return;
if (Math.Abs(b.Width) > 0) if (Math.Abs(b.Width) > 0)
{ {
scale = b.Width / args.ClientWidth; scale = b.Width / ClientWidth;
Element.WidthRequest = b.Width; Element.WidthRequest = b.Width;
Element.HeightRequest = scale * args.ClientHeight; Element.HeightRequest = scale * ClientHeight;
} }
else if (Math.Abs(b.Height) > 0) else if (Math.Abs(b.Height) > 0)
{ {
scale = b.Height / args.ClientHeight; scale = b.Height / ClientHeight;
Element.WidthRequest = scale * args.ClientWidth; Element.WidthRequest = scale * ClientWidth;
Element.HeightRequest = b.Height; Element.HeightRequest = b.Height;
} }
else else