# HG changeset patch
# User Alys Brooks <alysbrooks@fastmail.com>
# Date 2022-02-12 11:06:30
# Node ID e3be69aada5b611d8fe1a3fe1e3641a5793e5154
# Parent  0d56136b7883838dd37f2b7560ce6c0e9c4ad1c7

Draw areas when clicked.

diff --git a/isometric-park-fna/CellMap.cs b/isometric-park-fna/CellMap.cs
--- a/isometric-park-fna/CellMap.cs
+++ b/isometric-park-fna/CellMap.cs
@@ -1,6 +1,8 @@
 using System;
 using System.Collections.Generic;
 
+using Microsoft.Xna.Framework;
+
 namespace isometricparkfna
 {
 
@@ -186,6 +188,17 @@
             return count;
         }
 
+    public static Vector2 calculateMousegrid(Vector2 normalizedMousePos)
+    {
+        Vector2 adjust = new Vector2(Tile.TileSpriteWidth / 2, Tile.TileSpriteHeight);
+        Vector2 adjustedMousePos = normalizedMousePos - adjust;
+
+        float boardx = ((adjustedMousePos.X / Tile.TileSpriteWidth) + (adjustedMousePos.Y / Tile.TileSpriteHeight));
+        float boardy = ((adjustedMousePos.Y / Tile.TileSpriteHeight) - (adjustedMousePos.X / Tile.TileSpriteWidth));
+
+        return new Vector2((int)boardx, (int)boardy);
+    }
+
         public System.Collections.Generic.IEnumerable<Cell> iterate_cells_with_neighbors(int neighbors)
         {
             for (int i = 0; i < MapHeight; i++)
diff --git a/isometric-park-fna/Engines/BuildToolEngine.cs b/isometric-park-fna/Engines/BuildToolEngine.cs
new file mode 100644
--- /dev/null
+++ b/isometric-park-fna/Engines/BuildToolEngine.cs
@@ -0,0 +1,29 @@
+using System;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework.Input;
+
+using Encompass;
+
+using isometricparkfna.Messages;
+using isometricparkfna.Components;
+
+namespace isometricparkfna.Engines {
+
+    [Receives(typeof(SpawnSelection),
+            typeof(AdjustSelection))]
+    [Writes(typeof(AreaComponent))]
+    public class BuildToolEngine : Engine {
+        public override void Update(double dt) {
+
+            foreach (ref readonly var message in ReadMessages<SpawnSelection>())
+            {
+                var entity = CreateEntity();
+
+                AddComponent(entity, new AreaComponent { squares = new[] {message.Start} });
+                AddComponent(entity, new SelectedComponent { selected = false});
+            }
+        }
+    }
+}
+
diff --git a/isometric-park-fna/Engines/GameBridgeEngine.cs b/isometric-park-fna/Engines/GameBridgeEngine.cs
--- a/isometric-park-fna/Engines/GameBridgeEngine.cs
+++ b/isometric-park-fna/Engines/GameBridgeEngine.cs
@@ -91,19 +91,23 @@
             foreach (ref readonly var entity in ReadEntities<AreaComponent>())
             {
                 var areaComponent = GetComponent<AreaComponent>(entity);
-                var contractStatusComponent = GetComponent<ContractStatusComponent>(entity);
-                foreach (var square in areaComponent.squares)
-                {
-                    if (game.mouseGrid == square)
-                    {
-                        game.in_zone = true;
-                        if ((contractStatusComponent.status == ContractStatus.Active)
-                                || (contractStatusComponent.status == ContractStatus.Accepted))
-                        {
-                            game.in_active_zone = true;
-                        }
-                    }
-                }
+
+		if (HasComponent<ContractStatusComponent>(entity))
+		{
+			var contractStatusComponent = GetComponent<ContractStatusComponent>(entity);
+			foreach (var square in areaComponent.squares)
+			{
+				if (game.mouseGrid == square)
+				{
+					game.in_zone = true;
+					if ((contractStatusComponent.status == ContractStatus.Active)
+							|| (contractStatusComponent.status == ContractStatus.Accepted))
+					{
+						game.in_active_zone = true;
+					}
+				}
+			}
+		}
             }
 
             foreach (ref readonly var message in ReadMessages<QuitGameMessage>())
diff --git a/isometric-park-fna/Engines/InputEngine.cs b/isometric-park-fna/Engines/InputEngine.cs
--- a/isometric-park-fna/Engines/InputEngine.cs
+++ b/isometric-park-fna/Engines/InputEngine.cs
@@ -20,7 +20,9 @@
             typeof(TogglePauseMessage),
             typeof(GameRateMessage),
             typeof(GameStateMessage),
-            typeof(QuitGameMessage))]
+            typeof(QuitGameMessage),
+	    typeof(SpawnSelection),
+	    typeof(AdjustSelection))]
     [Reads(typeof(WindowTypeComponent),
            typeof(GameStateComponent),
            typeof(VisibilityComponent))]
@@ -52,7 +54,6 @@
             var mouseCur = Mouse.GetState();
             var original_point = Vector2.Transform(new Vector2(mouseCur.X, mouseCur.Y),
                                                    Matrix.Invert(this.camera.get_transformation(this.graphicsDevice)));
-
             bool isPlaying = false;
 
             var viewWidth = gdm.PreferredBackBufferWidth;
@@ -238,6 +239,13 @@
                 SendMessage(new JumpCameraMessage {Movement = original_point});
             }
 
+            if (mouseCur.LeftButton == ButtonState.Pressed && mousePrev.LeftButton == ButtonState.Released
+		    && keyboardCur.IsKeyDown(Keys.LeftShift)
+		    )
+            {
+                SendMessage(new SpawnSelection {Start = CellMap.calculateMousegrid(original_point)});
+            }
+
             #endregion
             this.keyboardPrev = keyboardCur;
             this.mousePrev = mouseCur;
diff --git a/isometric-park-fna/FNAGame.cs b/isometric-park-fna/FNAGame.cs
--- a/isometric-park-fna/FNAGame.cs
+++ b/isometric-park-fna/FNAGame.cs
@@ -288,7 +288,7 @@
         WorldBuilder.AddEngine(new PolicyEngine());
         WorldBuilder.AddEngine(new TraceryBridgeEngine(this.grammar));
         WorldBuilder.AddEngine(new SimulationGameRateBridgeEngine(this.simulation));
-
+        WorldBuilder.AddEngine(new BuildToolEngine());
 
         WorldBuilder.AddGeneralRenderer(new AreaRenderer(this.tileBatch, this.monoFont), 1);
         WorldBuilder.AddGeneralRenderer(new ImGuiWindowRenderer(this, this.simulation, this.imGuiWindowBridgeEngine, this.gdm), 2);
diff --git a/isometric-park-fna/Messages/AdjustSelection.cs b/isometric-park-fna/Messages/AdjustSelection.cs
new file mode 100644
--- /dev/null
+++ b/isometric-park-fna/Messages/AdjustSelection.cs
@@ -0,0 +1,9 @@
+using Microsoft.Xna.Framework;
+
+using Encompass;
+
+namespace isometricparkfna.Messages {
+    public struct AdjustSelection : IMessage {
+        public Vector2 End;
+    }
+}
diff --git a/isometric-park-fna/Messages/SpawnSelection.cs b/isometric-park-fna/Messages/SpawnSelection.cs
new file mode 100644
--- /dev/null
+++ b/isometric-park-fna/Messages/SpawnSelection.cs
@@ -0,0 +1,9 @@
+using Microsoft.Xna.Framework;
+
+using Encompass;
+
+namespace isometricparkfna.Messages {
+    public struct SpawnSelection : IMessage {
+        public Vector2 Start;
+    }
+}
diff --git a/isometric-park-fna/Renderers/AreaRenderer.cs b/isometric-park-fna/Renderers/AreaRenderer.cs
--- a/isometric-park-fna/Renderers/AreaRenderer.cs
+++ b/isometric-park-fna/Renderers/AreaRenderer.cs
@@ -32,6 +32,7 @@
             {
                 var areaComponent = GetComponent<AreaComponent>(entity);
                 // var SelectedComponent = GetComponent<SelectedComponent>(entity);
+                var selected = GetComponent<SelectedComponent>(entity).selected;
 
                 if (!HasComponent<ContractStatusComponent>(entity)
                         || GetComponent<ContractStatusComponent>(entity).status == ContractStatus.Accepted
@@ -41,9 +42,7 @@
                     Quad.FillSquares(batch, areaComponent.squares, Color.Teal, 0.5f, 0.79f);
                 }
 
-                var selected = GetComponent<SelectedComponent>(entity).selected;
-
-                if (HasComponent<ContractStatusComponent>(entity)
+		else if (HasComponent<ContractStatusComponent>(entity)
                         && selected
                         // && GetComponent<SelectedComponent>(entity).selected
                    )
@@ -51,6 +50,11 @@
                     Tile.DrawOutlinedSquares(batch, areaComponent.squares, Color.Teal);
                     Quad.FillSquares(batch, areaComponent.squares, Color.Gray, 0.5f, 0.80f);
                 }
+		else if (!HasComponent<ContractStatusComponent>(entity) )
+		{
+                    Quad.FillSquares(batch, areaComponent.squares, Color.Red, 0.5f, 0.80f);
+                    Tile.DrawOutlinedSquares(batch, areaComponent.squares, Color.Red);
+		}
             }
         }
     }