public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
view = this.View;
view = inflater.Inflate(Resource.Layout.MenuFragment, container, false);
if (holder == null)
{
holder = new MenuViewHolder();
}
FragmentManager.BeginTransaction().Hide(this).Commit();
SetHolderViews();
AssignClickEvents();
return(view);
}
public static View SetupMenuCell(int position, IListItem inVm, View convertView)
{
var vm = inVm as BaseMenuItemViewModel;
var inflater = LayoutInflater.FromContext(Application.Context);
MenuViewHolder viewHolder = null;
if (convertView == null)
{
convertView = inflater.Inflate(Resource.Layout.DrawerCell, null, false);
convertView.Tag = new MenuViewHolder
{
Image = convertView.FindViewById <ImageView>(Resource.Id.DrawerCellImage),
Title = convertView.FindViewById <TextView>(Resource.Id.DrawerCellText),
Subtitle = convertView.FindViewById <TextView>(Resource.Id.DrawerCellFooterText),
HolderVm = vm
};
viewHolder = convertView.Tag as MenuViewHolder;
}
else
{
var oldViewHolder = convertView.Tag as MenuViewHolder;
//null check and see if the viewHolder's Vm is the same type as our current vm
if (oldViewHolder != null && oldViewHolder.HolderVm.GetType() != vm.GetType())
{
//They are different, so lets unbind the previous vm's property changed
if (oldViewHolder.PropertyChanger != null)
{
oldViewHolder.HolderVm.PropertyChanged -= oldViewHolder.PropertyChanger;
}
//Lets go ahead and remove the on select method if it exists
if (oldViewHolder.OnSelect != null)
{
convertView.Click -= oldViewHolder.OnSelect;
}
viewHolder = oldViewHolder;
viewHolder.HolderVm = vm;
}
else
{
return(convertView);
}
}
viewHolder.Image.SetImageResource(DrawableHelpers.GetDrawableResourceIdViaReflection(vm.ImageName));
viewHolder.Title.Text = vm.Title;
viewHolder.Subtitle.Text = vm.Subtitle;
viewHolder.PropertyChanger = (object sender, System.ComponentModel.PropertyChangedEventArgs e) =>
{
var senderVm = sender as BaseMenuItemViewModel;
switch (e.PropertyName)
{
case "Title":
viewHolder.Title.Text = senderVm.Title;
break;
case "Subtitle":
viewHolder.Subtitle.Text = senderVm.Subtitle;
break;
case "ImageName":
viewHolder.Image.SetImageResource(
DrawableHelpers.GetDrawableResourceIdViaReflection(senderVm.ImageName));
break;
case "UserInteractionEnabled":
convertView.Click -= viewHolder.OnSelect;
if (vm.UserInteractionEnabled)
{
convertView.Click += viewHolder.OnSelect;
}
break;
}
};
viewHolder.OnSelect = (sender, eventargs) => vm.Selected();
vm.PropertyChanged += viewHolder.PropertyChanger;
if (vm.UserInteractionEnabled)
{
convertView.Click += viewHolder.OnSelect;
}
convertView.Tag = viewHolder;
return(convertView);
}
