Common-VS2019/SacsMobileMaui/Maui/Pages/SamContentPage.cs

using Microsoft.Maui.Controls;
using Sarand.Net.Mobile.Maui.Views;
using Sarand.Net.Standard.Base.Utils;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;

namespace Sarand.Net.Mobile.Maui.Pages
{
	//=======================================================================
	public abstract class SamContentPage : ContentPage
	{
		//-------------------------------------------------------------------
		// Definitions.

		//-------------------------------------------------------------------
		// Data members.

		//-------------------------------------------------------------------
		// Construction.
		public SamContentPage()
		{
		}

		//-------------------------------------------------------------------
		// Properties.
		public abstract String MessageTitleDefault { get; }

		//-------------------------------------------------------------------
		//              C o n f i g u r e   C o m p o n e n t s
		//-------------------------------------------------------------------
		protected virtual void ConfigureComponents()
		{
		}

		protected virtual void ConfigureChildComponents()
		{
			// Configure child components.
			if (Content != null)
			{
				ConfigureChildComponent(Content);
				foreach (var descendent in Content.GetVisualTreeDescendants())
				{
					View? childView = descendent as View;
					if (childView != null)
						ConfigureChildComponent(childView);
				}
			}
		}

		private void ConfigureChildComponent(View view)
		{
			if (view is ISamView)
			{
				ISamView? samView = view as ISamView;
				if (samView != null)
					samView.ConfigureComponents();
			}
		}

		//-------------------------------------------------------------------
		//                  C o n t r o l   A c t i v i t y
		//-------------------------------------------------------------------
		protected virtual void SetControlActivity()
		{
			SetControlsReadOnly();

			// Child component control activity.
			if (Content != null)
			{
				SetChildControlActivity(Content);
				foreach (var descendent in Content.GetVisualTreeDescendants())
				{
					View? childView = descendent as View;
					if (childView != null)
						SetChildControlActivity(childView);
				}
			}
		}
		private void SetChildControlActivity(View view)
		{
			if (view is ISamView)
			{
				ISamView? samView = view as ISamView;
				if (samView != null)
					samView.SetControlActivity();
			}
		}
		protected virtual void SetControlsReadOnly()
		{
		}

		//-------------------------------------------------------------------
		//                    P o p u p   M e s s a g e s
		//-------------------------------------------------------------------
		public enum AlertMode
		{
			OK,
			Close,
		}
		public Task DisplayAlert(String message, AlertMode alertMode = AlertMode.OK)
		{
			String title = StringUtil.OnEmpty(Title, MessageTitleDefault);
			String cancel = "OK";
			if (alertMode == AlertMode.Close)
				cancel = "Close";
			return DisplayAlert(title, message, cancel);
		}
		public enum ConfirmMode
		{
			YesNo,
			OkCancel
		}
		public async Task<bool> DisplayConfirm(String message, ConfirmMode confirmMode = ConfirmMode.OkCancel)
		{
			String title = StringUtil.OnEmpty(Title, MessageTitleDefault);
			String accept = "Yes";
			String cancel = "No";
			if (confirmMode == ConfirmMode.OkCancel)
			{
				accept = "OK";
				cancel = "Cancel";
			}
			return await DisplayAlert(title, message, accept, cancel);
		}

		//-------------------------------------------------------------------
		//                       P a g e   E v e n t s
		//-------------------------------------------------------------------
		protected override void OnParentSet()
		{
			base.OnParentSet();
		}

		//-------------------------------------------------------------------
		protected override void OnPropertyChanged([CallerMemberName] string propertyName = "")
		{
			base.OnPropertyChanged(propertyName);
		}

		//-------------------------------------------------------------------
		protected override void OnAppearing()
		{
			base.OnAppearing();
			ConfigureComponents();
			ConfigureChildComponents();
		}

		//-------------------------------------------------------------------
		// Layout changes.
		private bool inOnSizeAllocated = false;
		protected override void OnSizeAllocated(double width, double height)
		{
			bool alreadyInOnSizeAllocated = inOnSizeAllocated;
			inOnSizeAllocated = true;
			base.OnSizeAllocated(width, height);
			// Only configure components if this is the first entry to this event
			// // to avoid iterative layout changes caused by components being configured.
			if (!alreadyInOnSizeAllocated)
			{
				if (Width > 0 && Height > 0)
				{
					ConfigureComponents();
					ConfigureChildComponents();
				}
				inOnSizeAllocated = false;
			}
		}

		//-------------------------------------------------------------------
		protected override void OnDisappearing()
		{
			base.OnDisappearing();
		}

		//-------------------------------------------------------------------
	}
	//=======================================================================
}