public IVisualElementRenderer Convert(Xamarin.Forms.View source, Xamarin.Forms.VisualElement valid)
{
IVisualElementRenderer render = (IVisualElementRenderer)source.GetValue(RendererProperty);
if (render == null)
{
render = RendererFactory.GetRenderer(source);
source.SetValue(RendererProperty, render);
if (valid != null)
{
var p = PlatformProperty.GetValue(valid);
if (p != null)
{
PlatformProperty.SetValue(source, p);
IsPlatformEnabledProperty.SetValue(source, true);
}
}
}
return render;
}
public IXFPopupCtrl CreateDropDown(Xamarin.Forms.View anchor, Xamarin.Forms.View drop)
{
CustomPopup dlg = null;
//first try to get the PopupHolderRenderer
//first try to get the PopupHolderRenderer
if(anchor == null || drop == null){
return null;
}
var anchorRender = anchor.GetValue(RendererProperty) as UIView;
if (anchorRender == null) {
return null;
}
var render = Convert(drop, anchor);
if (render == null) {
return null;
}
if (render != null) {
var size = drop.GetSizeRequest(anchorRender.Bounds.Width, XFPopupConst.SCREEN_HEIGHT);
var width = anchorRender.Bounds.Width;
var height = (int)size.Request.Height;
if (height > (XFPopupConst.SCREEN_HEIGHT * 3/ 4))
{
height = (int)(XFPopupConst.SCREEN_HEIGHT * 3/ 4);
}
//important
drop.Layout(new Xamarin.Forms.Rectangle(0, 0, width - 2*padding, height));
var native = render as UIKit.UIView;
native.Frame = new CoreGraphics.CGRect (padding, padding, width - 2*padding, height);
dlg = new CustomPopup(native, true, width, height + 2*padding, ShowType.DropDown,anchorRender);
}
return dlg;
}
public IXFPopupCtrl CreateDropDown(Xamarin.Forms.View anchor, Xamarin.Forms.View drop)
{
CustomDropDown dropctr = null;
//get the renderer of anchor
if (anchor != null) {
var ar = anchor.GetValue(RendererProperty);
if (ar != null) {
var dropView = Convert(drop, anchor);
if (dropView == null) {
return null;
}
double w = (int)anchor.Width;
double h = XFPopupConst.SCREEN_HEIGHT/2;
drop.WidthRequest = w;
var size = drop.GetSizeRequest(w, XFPopupConst.SCREEN_HEIGHT / 2);
if (size.Request.Height < h) {
h = size.Request.Height;
}
drop.Layout(new Rectangle(0, 0, w, h));
float density = Forms.Context.Resources.DisplayMetrics.Density;
w = w * density;
h = h * density;
var native = dropView as Android.Views.View;
native.LayoutParameters = new ViewGroup.LayoutParams((int)w, (int)h);
dropctr = new CustomDropDown(ar as Android.Views.View, native, (int)w + 4, (int)h+10);
}
}
return dropctr;
}
