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using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using System.Collections.Generic;
using System.Linq;
using V3.Input;
namespace V3.Widgets
{
/// <summary>
/// An abstract menu that handles the updating and drawing of widgtes.
/// </summary>
public abstract class AbstractMenu : IMenu
{
public List<IWidget> Widgets { get; } = new List<IWidget>();
public Vector2 Size { get; private set; }
public Vector2 Position { get; private set; }
private readonly GraphicsDeviceManager mGraphicsDeviceManager;
protected AbstractMenu(GraphicsDeviceManager graphicsDeviceManager)
{
mGraphicsDeviceManager = graphicsDeviceManager;
}
public void HandleMouseEvent(IMouseEvent mouseEvent)
{
foreach (var clickable in Widgets.OfType<IClickable>())
clickable.HandleMouseEvent(mouseEvent);
}
public void Draw(SpriteBatch spriteBatch)
{
UpdateWidgetRelativePositions();
UpdateWidgetAbsolutePositions();
spriteBatch.Begin();
Widgets.ForEach(w => w.Draw(spriteBatch));
spriteBatch.End();
}
public void Update()
{
ResetClicked();
UpdateMouseSelection();
UpdateWidgetSizes();
}
protected abstract void UpdateWidgetSizes();
protected abstract void UpdateWidgetRelativePositions();
protected abstract Vector2 GetTotalSize();
private void UpdateWidgetAbsolutePositions()
{
var viewport = mGraphicsDeviceManager.GraphicsDevice.Viewport;
Size = GetTotalSize();
var viewportSize = new Vector2(viewport.Bounds.Width, viewport.Bounds.Height);
Position = (viewportSize - Size) / 2;
Widgets.ForEach(w => w.Position = w.Position + Position);
}
private void ResetClicked()
{
foreach (var clickable in Widgets.OfType<IClickable>())
clickable.IsClicked = false;
}
private void UpdateMouseSelection()
{
var position = Mouse.GetState().Position;
foreach (var selectable in Widgets.OfType<ISelectable>())
selectable.IsSelected = selectable.CheckSelected(position);
}
protected static void MakeWidgetsSameSize(IEnumerable<IWidget> widgets)
{
var xMax = 0f;
var yMax = 0f;
var widgetsCopy = widgets as IList<IWidget> ?? widgets.ToList();
foreach (var widget in widgetsCopy)
{
var size = widget.GetMinimumSize();
if (size.X > xMax)
xMax = size.X;
if (size.Y > yMax)
yMax = size.Y;
}
var sizeMax = new Vector2(xMax, yMax);
foreach (var widget in widgetsCopy)
widget.Size = sizeMax;
}
}
}
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