Display the science/luxury rates and allow the player to change them

#392

C7/Game.cs

@@ -226,6 +226,11 @@ public void processEngineMessages(GameData gameData) {
 					// TODO: calculate research speed.
 					EmitSignal(SignalName.UpdateTechProgress, tech.Name, -1);
 					break;
+				case MsgUpdateUiAfterSliderChange mUUASC:
+					// F1 is the science advisor.
+					// TODO: Move the F* key strings to a set of constants/enum.
+					EmitSignal(SignalName.ShowSpecificAdvisor, "F1");
+					break;
 			}
 		}
 	}

C7/UIElements/Advisors/Advisors.cs

@@ -44,13 +44,14 @@ private void OnShowSpecificAdvisor(string advisorType) {
 		}
 
 		if (advisorType.Equals("F1")) {
-			if (domesticAdvisor == null) {
-				domesticAdvisor = new DomesticAdvisor();
-				advisors.Add(domesticAdvisor);
-				AddChild(domesticAdvisor);
-			} else {
-				domesticAdvisor.Show();
+			if (domesticAdvisor != null) {
+				RemoveChild(domesticAdvisor);
+				domesticAdvisor = null;
 			}
+
+			domesticAdvisor = new DomesticAdvisor();
+			advisors.Add(domesticAdvisor);
+			AddChild(domesticAdvisor);
 			this.Show();
 		}
 		if (advisorType.Equals("F6")) {

C7/UIElements/Advisors/DomesticAdvisor.cs

@@ -1,10 +1,17 @@
+using C7Engine;
+using C7GameData;
 using Godot;
 using System;
 
 public partial class DomesticAdvisor : TextureRect {
-	// Declare member variables here. Examples:
-	// private int a = 2;
-	// private string b = "text";
+	TextureRect scienceSliderIcon = new();
+	Label scienceSliderLabel = new();
+	TextureRect luxurySliderIcon = new();
+	Label luxurySliderLabel = new();
+
+	// The Y position of the two sliders.
+	private int scienceSliderY = 84;
+	private int luxurySliderY = 130;
 
 	// Called when the node enters the scene tree for the first time.
 	public override void _Ready() {
@@ -45,9 +52,70 @@ private void CreateUI() {
 		GoBackButton.SetPosition(new Vector2(952, 720));
 		AddChild(GoBackButton);
 		GoBackButton.Pressed += ReturnToMenu;
+
+		ImageTexture scienceSliderTexture = Util.LoadTextureFromPCX("Art/city screen/CityIcons.pcx", 34, 2, 30, 30);
+		ImageTexture luxurySliderTexture = Util.LoadTextureFromPCX("Art/city screen/CityIcons.pcx", 376, 2, 30, 30);
+
+		int scienceRate;
+		int luxuryRate;
+		using (UIGameDataAccess gameDataAccess = new()) {
+			Player player = gameDataAccess.gameData.GetHumanPlayers()[0];
+			scienceRate = player.scienceRate;
+			luxuryRate = player.luxuryRate;
+		}
+
+		scienceSliderIcon.Texture = scienceSliderTexture;
+		scienceSliderIcon.SetPosition(new Vector2(CalculateSliderXPos(scienceRate), scienceSliderY));
+		AddChild(scienceSliderIcon);
+
+		luxurySliderIcon.Texture = luxurySliderTexture;
+		luxurySliderIcon.SetPosition(new Vector2(CalculateSliderXPos(luxuryRate), luxurySliderY));
+		AddChild(luxurySliderIcon);
+
+		scienceSliderLabel.Text = $"{scienceRate * 10}%";
+		scienceSliderLabel.SetPosition(new Vector2(760, scienceSliderY + 6));
+		AddChild(scienceSliderLabel);
+
+		luxurySliderLabel.Text = $"{luxuryRate * 10}%";
+		luxurySliderLabel.SetPosition(new Vector2(760, luxurySliderY + 4));
+		AddChild(luxurySliderLabel);
+
+		ImageTexture plusTexture = Util.LoadTextureFromPCX("Art/Advisors/domestic_icons_aux.pcx", 75, 1, 22, 22);
+		ImageTexture minusTexture = Util.LoadTextureFromPCX("Art/Advisors/domestic_icons_aux.pcx", 51, 1, 22, 22);
+
+		TextureButton moreScience = new();
+		moreScience.TextureNormal = plusTexture;
+		moreScience.SetPosition(new Vector2(725, scienceSliderY + 25));
+		moreScience.Pressed += () => { new MsgChangeSliders(true, false, false, false).send(); };
+		AddChild(moreScience);
+
+		TextureButton lessScience = new();
+		lessScience.TextureNormal = minusTexture;
+		lessScience.SetPosition(new Vector2(575, scienceSliderY + 25));
+		lessScience.Pressed += () => { new MsgChangeSliders(false, true, false, false).send(); };
+		AddChild(lessScience);
+
+		TextureButton moreLuxury = new();
+		moreLuxury.TextureNormal = plusTexture;
+		moreLuxury.SetPosition(new Vector2(725, luxurySliderY - 5));
+		moreLuxury.Pressed += () => { new MsgChangeSliders(false, false, true, false).send(); };
+		AddChild(moreLuxury);
+
+		TextureButton lessLuxury = new();
+		lessLuxury.TextureNormal = minusTexture;
+		lessLuxury.SetPosition(new Vector2(575, luxurySliderY - 5));
+		lessLuxury.Pressed += () => { new MsgChangeSliders(false, false, false, true).send(); };
+		AddChild(lessLuxury);
 	}
 
 	private void ReturnToMenu() {
 		GetParent<Advisors>().Hide();
 	}
+
+	private int CalculateSliderXPos(int sliderRate) {
+		int minX = 570;
+		int maxX = 725;
+
+		return minX + (int)((maxX - minX) * (sliderRate / 10.0));
+	}
 }

C7Engine/EntryPoints/MessageToEngine.cs

@@ -154,6 +154,67 @@ public override void process() {
 		}
 	}
 
+	public class MsgChangeSliders : MessageToEngine {
+		private bool moreScience;
+		private bool lessScience;
+		private bool moreLuxury;
+		private bool lessLuxury;
+
+		public MsgChangeSliders(bool moreScience, bool lessScience, bool moreLuxury, bool lessLuxury) {
+			this.moreScience = moreScience;
+			this.lessScience = lessScience;
+			this.moreLuxury = moreLuxury;
+			this.lessLuxury = lessLuxury;
+		}
+
+		public override void process() {
+			Player player = EngineStorage.gameData.GetHumanPlayers()[0];
+
+			if (moreScience && player.scienceRate == 10 || lessScience && player.scienceRate == 0) {
+				return;
+			}
+			if (moreLuxury && player.luxuryRate == 10 || lessLuxury && player.luxuryRate == 0) {
+				return;
+			}
+
+			// Increase our science rate, taking away from tax rate if we can,
+			// otherwise decrease the luxury rate.
+			if (moreScience) {
+				player.scienceRate++;
+				if (player.taxRate > 0) {
+					player.taxRate--;
+				} else {
+					player.luxuryRate--;
+				}
+			}
+
+			// Ditto for luxury.
+			if (moreLuxury) {
+				player.luxuryRate++;
+				if (player.taxRate > 0) {
+					player.taxRate--;
+				} else {
+					player.scienceRate--;
+				}
+			}
+
+			// Decreasing is easier, we decrease the requested slider and bump
+			// up the tax rate.
+			if (lessScience) {
+				player.scienceRate--;
+				player.taxRate++;
+			}
+
+			if (lessLuxury) {
+				player.luxuryRate--;
+				player.taxRate++;
+			}
+
+			// Update the ui to reflect our changes.
+			new MsgUpdateUiAfterSliderChange().send();
+		}
+	}
+
 	public class MsgEndTurn : MessageToEngine {
 
 		private ILogger log = Log.ForContext<MsgEndTurn>();

C7Engine/EntryPoints/MessageToUI.cs

@@ -42,6 +42,8 @@ public class MsgUpdateUiAfterMove : MessageToUI { }
 
 	public class MsgUpdateUiAfterTechSelection : MessageToUI { }
 
+	public class MsgUpdateUiAfterSliderChange : MessageToUI { }
+
 	public class MsgCityDestroyed : MessageToUI {
 		public City city;