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using System;
using Microsoft.Xna.Framework;
namespace Celesteia.UI {
public struct Rect {
public static Rect AbsoluteZero = new Rect(AbsoluteUnit.WithValue(0f));
public static Rect AbsoluteOne = new Rect(AbsoluteUnit.WithValue(1f));
public static Rect ScreenFull = new Rect(
new ScreenSpaceUnit(0f, ScreenSpaceUnit.ScreenSpaceOrientation.Horizontal),
new ScreenSpaceUnit(0f, ScreenSpaceUnit.ScreenSpaceOrientation.Vertical),
new ScreenSpaceUnit(1f, ScreenSpaceUnit.ScreenSpaceOrientation.Horizontal),
new ScreenSpaceUnit(1f, ScreenSpaceUnit.ScreenSpaceOrientation.Vertical)
);
public static Rect RelativeFull(Rect parent) => new Rect(
new RelativeUnit(0f, parent, RelativeUnit.Orientation.Horizontal),
new RelativeUnit(0f, parent, RelativeUnit.Orientation.Vertical),
new RelativeUnit(1f, parent, RelativeUnit.Orientation.Horizontal),
new RelativeUnit(1f, parent, RelativeUnit.Orientation.Vertical)
);
public IInterfaceUnit X;
public IInterfaceUnit Y;
public IInterfaceUnit Width;
public IInterfaceUnit Height;
public Rect(IInterfaceUnit uniform) : this (uniform, uniform, uniform, uniform) { }
public Rect(IInterfaceUnit x, IInterfaceUnit y, IInterfaceUnit width, IInterfaceUnit height) {
this.X = x;
this.Y = y;
this.Width = width;
this.Height = height;
}
public Rect SetX(IInterfaceUnit x) {
X = x;
return this;
}
public Rect SetY(IInterfaceUnit y) {
Y = y;
return this;
}
public Rect SetWidth(IInterfaceUnit w) {
Width = w;
return this;
}
public Rect SetHeight(IInterfaceUnit h) {
Height = h;
return this;
}
public float[] Resolve() {
return new float[] { X.Resolve(), Y.Resolve(), Width.Resolve(), Height.Resolve() };
}
public bool Contains(Point point) {
return (
point.X >= this.X.Resolve() &&
point.Y >= this.Y.Resolve() &&
point.X <= this.X.Resolve() + this.Width.Resolve() &&
point.Y <= this.Y.Resolve() + this.Height.Resolve()
);
}
public bool Contains(int x, int y) {
return Contains(new Point(x, y));
}
public override string ToString() {
return $"{X.Resolve().ToString("0.00")} {Y.Resolve().ToString("0.00")} {Width.Resolve().ToString("0.00")} {Height.Resolve().ToString("0.00")}";
}
public Rectangle ResolveRectangle()
{
float[] resolved = this.Resolve();
return new Rectangle(
(int) MathF.Floor(resolved[0]),
(int) MathF.Floor(resolved[1]),
(int) MathF.Floor(resolved[2]),
(int) MathF.Floor(resolved[3])
);
}
}
public interface IInterfaceUnit {
public float Resolve();
public void SetValue(float value);
}
public struct AbsoluteUnit : IInterfaceUnit
{
public float value { get; private set; }
public AbsoluteUnit(float value) {
this.value = value;
}
public static AbsoluteUnit WithValue(float value) {
return new AbsoluteUnit(value);
}
public void SetValue(float value) {
this.value = value;
}
public float Resolve()
{
return value;
}
}
public struct ScreenSpaceUnit : IInterfaceUnit
{
public float value { get; private set; }
public ScreenSpaceOrientation orientation { get; private set; }
public ScreenSpaceUnit(float value, ScreenSpaceOrientation orientation) {
this.value = value;
this.orientation = orientation;
}
public void SetValue(float value) {
this.value = value;
}
public void SetOrientation(ScreenSpaceOrientation orientation) {
this.orientation = orientation;
}
public float Resolve()
{
if (UIReferences.gameWindow != null) {
switch (orientation) {
case ScreenSpaceOrientation.Horizontal:
return value * UIReferences.gameWindow.ClientBounds.Width;
case ScreenSpaceOrientation.Vertical:
return value * UIReferences.gameWindow.ClientBounds.Height;
}
}
return 0f;
}
public enum ScreenSpaceOrientation {
Horizontal, Vertical
}
}
public struct RelativeUnit : IInterfaceUnit
{
public float value { get; private set; }
public Rect parent { get; private set; }
public Orientation orientation { get; private set; }
public RelativeUnit(float value, Rect parent, Orientation orientation) {
this.value = value;
this.parent = parent;
this.orientation = orientation;
}
public void SetValue(float value) {
this.value = value;
}
public void SetOrientation(Orientation orientation) {
this.orientation = orientation;
}
public float Resolve()
{
switch (orientation) {
case Orientation.Horizontal:
return value * parent.Resolve()[2];
case Orientation.Vertical:
return value * parent.Resolve()[3];
default:
return 0f;
}
}
public enum Orientation {
Horizontal, Vertical
}
}
}
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