refactor: move material and thickness from Plate to Nest

Material and thickness are properties of the nest (all plates share the
same material/gauge), not individual plates. This moves them to the Nest
class, removes them from Plate and PlateSettings, and updates the UI so
EditNestInfoForm has a material field while EditPlateForm no longer shows
thickness. The nest file format gains top-level thickness/material fields
with backward-compatible reading from PlateDefaults for old files.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

OpenNest/Controls/PlateView.cs

@@ -782,8 +782,6 @@ namespace OpenNest.Controls
             {
                 Quadrant = Plate.Quadrant,
                 PartSpacing = Plate.PartSpacing,
-                Thickness = Plate.Thickness,
-                Material = Plate.Material,
             };
             previewPlate.EdgeSpacing = Plate.EdgeSpacing;
             progressForm.PreviewPlate = previewPlate;

OpenNest/Forms/BomImportForm.cs

@@ -400,8 +400,8 @@ namespace OpenNest.Forms
                 nest.DateCreated = DateTime.Now;
                 nest.DateLastModified = DateTime.Now;
                 nest.PlateDefaults.Size = new Geometry.Size(plateWidth, plateLength);
-                nest.PlateDefaults.Thickness = thickness;
-                nest.PlateDefaults.Material = new Material(material);
+                nest.Thickness = thickness;
+                nest.Material = new Material(material);
                 nest.PlateDefaults.Quadrant = 1;
                 nest.PlateDefaults.PartSpacing = 1;
                 nest.PlateDefaults.EdgeSpacing = new Spacing(1, 1, 1, 1);

OpenNest/Forms/EditNestInfoForm.Designer.cs

@@ -62,6 +62,8 @@
             this.textBox1 = new System.Windows.Forms.TextBox();
             this.textBox2 = new System.Windows.Forms.TextBox();
             this.label5 = new System.Windows.Forms.Label();
+            this.labelMaterial = new System.Windows.Forms.Label();
+            this.materialBox = new System.Windows.Forms.TextBox();
             this.tabPage2 = new System.Windows.Forms.TabPage();
             this.tabPage3 = new System.Windows.Forms.TabPage();
             this.notesBox = new System.Windows.Forms.TextBox();
@@ -401,28 +403,31 @@
             this.tableLayoutPanel3.ColumnCount = 2;
             this.tableLayoutPanel3.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
             this.tableLayoutPanel3.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 100F));
-            this.tableLayoutPanel3.Controls.Add(this.tableLayoutPanel4, 1, 5);
+            this.tableLayoutPanel3.Controls.Add(this.tableLayoutPanel4, 1, 6);
             this.tableLayoutPanel3.Controls.Add(this.label1, 0, 0);
             this.tableLayoutPanel3.Controls.Add(this.nameBox, 1, 0);
-            this.tableLayoutPanel3.Controls.Add(this.label2, 0, 4);
+            this.tableLayoutPanel3.Controls.Add(this.label2, 0, 5);
             this.tableLayoutPanel3.Controls.Add(this.labelThk, 0, 3);
             this.tableLayoutPanel3.Controls.Add(this.thicknessBox, 1, 3);
+            this.tableLayoutPanel3.Controls.Add(this.labelMaterial, 0, 4);
+            this.tableLayoutPanel3.Controls.Add(this.materialBox, 1, 4);
             this.tableLayoutPanel3.Controls.Add(this.label3, 0, 1);
             this.tableLayoutPanel3.Controls.Add(this.label4, 0, 2);
-            this.tableLayoutPanel3.Controls.Add(this.customerBox, 1, 4);
+            this.tableLayoutPanel3.Controls.Add(this.customerBox, 1, 5);
             this.tableLayoutPanel3.Controls.Add(this.textBox1, 1, 1);
             this.tableLayoutPanel3.Controls.Add(this.textBox2, 1, 2);
-            this.tableLayoutPanel3.Controls.Add(this.label5, 0, 5);
+            this.tableLayoutPanel3.Controls.Add(this.label5, 0, 6);
             this.tableLayoutPanel3.Location = new System.Drawing.Point(6, 6);
             this.tableLayoutPanel3.Name = "tableLayoutPanel3";
-            this.tableLayoutPanel3.RowCount = 6;
-            this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 16.66667F));
-            this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 16.66667F));
-            this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 16.66667F));
-            this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 16.66667F));
-            this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 16.66667F));
-            this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 16.66667F));
-            this.tableLayoutPanel3.Size = new System.Drawing.Size(362, 240);
+            this.tableLayoutPanel3.RowCount = 7;
+            this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 14.28571F));
+            this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 14.28571F));
+            this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 14.28571F));
+            this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 14.28571F));
+            this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 14.28571F));
+            this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 14.28571F));
+            this.tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 14.28571F));
+            this.tableLayoutPanel3.Size = new System.Drawing.Size(362, 280);
             this.tableLayoutPanel3.TabIndex = 0;
             // 
             // tableLayoutPanel4
@@ -497,9 +502,27 @@
             this.thicknessBox.Size = new System.Drawing.Size(224, 22);
             this.thicknessBox.Suffix = "";
             this.thicknessBox.TabIndex = 7;
-            // 
+            //
+            // labelMaterial
+            //
+            this.labelMaterial.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.labelMaterial.AutoSize = true;
+            this.labelMaterial.Location = new System.Drawing.Point(3, 162);
+            this.labelMaterial.Name = "labelMaterial";
+            this.labelMaterial.Size = new System.Drawing.Size(126, 16);
+            this.labelMaterial.TabIndex = 10;
+            this.labelMaterial.Text = "Material :";
+            //
+            // materialBox
+            //
+            this.materialBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.materialBox.Location = new System.Drawing.Point(135, 159);
+            this.materialBox.Name = "materialBox";
+            this.materialBox.Size = new System.Drawing.Size(224, 22);
+            this.materialBox.TabIndex = 11;
+            //
             // label3
-            // 
+            //
             this.label3.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
             this.label3.AutoSize = true;
             this.label3.Location = new System.Drawing.Point(3, 50);
@@ -705,5 +728,7 @@
         private System.Windows.Forms.RadioButton radioButton1;
         private System.Windows.Forms.RadioButton radioButton2;
         private System.Windows.Forms.Label label5;
+        private System.Windows.Forms.Label labelMaterial;
+        private System.Windows.Forms.TextBox materialBox;
     }
 }

OpenNest/Forms/EditNestInfoForm.cs

@@ -106,6 +106,12 @@ namespace OpenNest.Forms
             set { thicknessBox.Value = (decimal)value; }
         }
 
+        public string MaterialName
+        {
+            get { return materialBox.Text; }
+            set { materialBox.Text = value; }
+        }
+
         public void SetUnits(Units units)
         {
             switch (units)
@@ -189,7 +195,8 @@ namespace OpenNest.Forms
             Customer = nest.Customer;
             DateCreated = nest.DateCreated;
             DateLastModified = nest.DateLastModified;
-            Thickness = nest.PlateDefaults.Thickness;
+            Thickness = nest.Thickness;
+            MaterialName = nest.Material?.Name ?? "";
             SizeString = nest.PlateDefaults.Size.ToString();
             PartSpacing = nest.PlateDefaults.PartSpacing;
             LeftSpacing = nest.PlateDefaults.EdgeSpacing.Left;
@@ -209,7 +216,8 @@ namespace OpenNest.Forms
             nest.Customer = Customer;
             nest.DateCreated = DateCreated;
             nest.DateLastModified = DateLastModified;
-            nest.PlateDefaults.Thickness = Thickness;
+            nest.Thickness = Thickness;
+            nest.Material = new Material(MaterialName);
             nest.PlateDefaults.Size = OpenNest.Geometry.Size.Parse(SizeString);
             nest.PlateDefaults.PartSpacing = PartSpacing;
             nest.PlateDefaults.EdgeSpacing = new Spacing(LeftSpacing, BottomSpacing, RightSpacing, TopSpacing);

OpenNest/Forms/EditPlateForm.Designer.cs

@@ -32,7 +32,6 @@
             this.labelQty = new System.Windows.Forms.Label();
             this.labelSize = new System.Windows.Forms.Label();
             this.textBoxSize = new System.Windows.Forms.TextBox();
-            this.labelThk = new System.Windows.Forms.Label();
             this.labelPartSpacing = new System.Windows.Forms.Label();
             this.groupBox1 = new System.Windows.Forms.GroupBox();
             this.tableLayoutPanel2 = new System.Windows.Forms.TableLayoutPanel();
@@ -50,7 +49,6 @@
             this.numericUpDownEdgeSpacingRight = new OpenNest.Controls.NumericUpDown();
             this.numericUpDownEdgeSpacingBottom = new OpenNest.Controls.NumericUpDown();
             this.numericUpDownQty = new OpenNest.Controls.NumericUpDown();
-            this.numericUpDownThickness = new OpenNest.Controls.NumericUpDown();
             this.numericUpDownPartSpacing = new OpenNest.Controls.NumericUpDown();
             this.tableLayoutPanel1.SuspendLayout();
             this.groupBox1.SuspendLayout();
@@ -62,7 +60,6 @@
             ((System.ComponentModel.ISupportInitialize)(this.numericUpDownEdgeSpacingRight)).BeginInit();
             ((System.ComponentModel.ISupportInitialize)(this.numericUpDownEdgeSpacingBottom)).BeginInit();
             ((System.ComponentModel.ISupportInitialize)(this.numericUpDownQty)).BeginInit();
-            ((System.ComponentModel.ISupportInitialize)(this.numericUpDownThickness)).BeginInit();
             ((System.ComponentModel.ISupportInitialize)(this.numericUpDownPartSpacing)).BeginInit();
             this.SuspendLayout();
             // 
@@ -75,18 +72,15 @@
             this.tableLayoutPanel1.Controls.Add(this.labelSize, 0, 0);
             this.tableLayoutPanel1.Controls.Add(this.textBoxSize, 1, 0);
             this.tableLayoutPanel1.Controls.Add(this.numericUpDownQty, 1, 1);
-            this.tableLayoutPanel1.Controls.Add(this.numericUpDownThickness, 1, 2);
-            this.tableLayoutPanel1.Controls.Add(this.labelThk, 0, 2);
-            this.tableLayoutPanel1.Controls.Add(this.labelPartSpacing, 0, 3);
-            this.tableLayoutPanel1.Controls.Add(this.numericUpDownPartSpacing, 1, 3);
+            this.tableLayoutPanel1.Controls.Add(this.labelPartSpacing, 0, 2);
+            this.tableLayoutPanel1.Controls.Add(this.numericUpDownPartSpacing, 1, 2);
             this.tableLayoutPanel1.Location = new System.Drawing.Point(18, 12);
             this.tableLayoutPanel1.Name = "tableLayoutPanel1";
-            this.tableLayoutPanel1.RowCount = 4;
-            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 25F));
-            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 25F));
-            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 25F));
-            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 25F));
-            this.tableLayoutPanel1.Size = new System.Drawing.Size(236, 144);
+            this.tableLayoutPanel1.RowCount = 3;
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 33.33333F));
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 33.33333F));
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 33.33333F));
+            this.tableLayoutPanel1.Size = new System.Drawing.Size(236, 108);
             this.tableLayoutPanel1.TabIndex = 0;
             // 
             // labelQty
@@ -119,18 +113,7 @@
             this.textBoxSize.Size = new System.Drawing.Size(133, 22);
             this.textBoxSize.TabIndex = 1;
             this.textBoxSize.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
-            // 
-            // labelThk
-            // 
-            this.labelThk.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
-            this.labelThk.AutoSize = true;
-            this.labelThk.Location = new System.Drawing.Point(3, 82);
-            this.labelThk.Name = "labelThk";
-            this.labelThk.Size = new System.Drawing.Size(91, 16);
-            this.labelThk.TabIndex = 4;
-            this.labelThk.Text = "Thickness :";
-            this.labelThk.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
-            // 
+            //
             // labelPartSpacing
             // 
             this.labelPartSpacing.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
@@ -352,22 +335,7 @@
             this.numericUpDownQty.Size = new System.Drawing.Size(133, 22);
             this.numericUpDownQty.Suffix = "";
             this.numericUpDownQty.TabIndex = 3;
-            // 
-            // numericUpDownThickness
-            // 
-            this.numericUpDownThickness.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
-            this.numericUpDownThickness.DecimalPlaces = 4;
-            this.numericUpDownThickness.Increment = new decimal(new int[] {
-            25,
-            0,
-            0,
-            131072});
-            this.numericUpDownThickness.Location = new System.Drawing.Point(100, 79);
-            this.numericUpDownThickness.Name = "numericUpDownThickness";
-            this.numericUpDownThickness.Size = new System.Drawing.Size(133, 22);
-            this.numericUpDownThickness.Suffix = "";
-            this.numericUpDownThickness.TabIndex = 5;
-            // 
+            //
             // numericUpDownPartSpacing
             // 
             this.numericUpDownPartSpacing.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
@@ -414,7 +382,6 @@
             ((System.ComponentModel.ISupportInitialize)(this.numericUpDownEdgeSpacingRight)).EndInit();
             ((System.ComponentModel.ISupportInitialize)(this.numericUpDownEdgeSpacingBottom)).EndInit();
             ((System.ComponentModel.ISupportInitialize)(this.numericUpDownQty)).EndInit();
-            ((System.ComponentModel.ISupportInitialize)(this.numericUpDownThickness)).EndInit();
             ((System.ComponentModel.ISupportInitialize)(this.numericUpDownPartSpacing)).EndInit();
             this.ResumeLayout(false);
 
@@ -441,8 +408,6 @@
         private Controls.NumericUpDown numericUpDownQty;
         private Controls.QuadrantSelect quadrantSelect1;
         private System.Windows.Forms.GroupBox groupBox2;
-        private Controls.NumericUpDown numericUpDownThickness;
-        private System.Windows.Forms.Label labelThk;
         private System.Windows.Forms.Label labelPartSpacing;
         private Controls.NumericUpDown numericUpDownPartSpacing;
         private Controls.BottomPanel bottomPanel1;

OpenNest/Forms/EditPlateForm.cs

@@ -58,7 +58,6 @@ namespace OpenNest.Forms
 
             var controls = new[]
             {
-                numericUpDownThickness,
                 numericUpDownPartSpacing,
                 numericUpDownEdgeSpacingBottom,
                 numericUpDownEdgeSpacingLeft,
@@ -110,12 +109,6 @@ namespace OpenNest.Forms
             set { numericUpDownPartSpacing.Value = (decimal)value; }
         }
 
-        public double Thickness
-        {
-            get { return (double)numericUpDownThickness.Value; }
-            set { numericUpDownThickness.Value = (decimal)value; }
-        }
-
         public int Quantity
         {
             get { return (int)numericUpDownQty.Value; }
@@ -163,7 +156,6 @@ namespace OpenNest.Forms
             PartSpacing = plate.PartSpacing;
             Quantity = plate.Quantity;
             Quadrant = plate.Quadrant;
-            Thickness = plate.Thickness;
         }
 
         private void Save()
@@ -176,7 +168,6 @@ namespace OpenNest.Forms
             plate.PartSpacing = PartSpacing;
             plate.Quantity = Quantity;
             plate.Quadrant = Quadrant;
-            plate.Thickness = Thickness;
         }
 
         private void textBox1_TextChanged(object sender, EventArgs e)

OpenNest/Forms/MainForm.cs

@@ -1017,8 +1017,6 @@ namespace OpenNest.Forms
             {
                 Quadrant = source.Quadrant,
                 PartSpacing = source.PartSpacing,
-                Thickness = source.Thickness,
-                Material = source.Material,
             };
             plate.EdgeSpacing = source.EdgeSpacing;
             return plate;

OpenNest/Forms/PatternTileForm.Designer.cs

@@ -15,13 +15,10 @@ namespace OpenNest.Forms
         {
             ColorScheme colorScheme1 = new ColorScheme();
             Plate plate1 = new Plate();
-            Material material1 = new Material();
             Collections.ObservableList<Part> observableList_11 = new Collections.ObservableList<Part>();
             Plate plate2 = new Plate();
-            Material material2 = new Material();
             Collections.ObservableList<Part> observableList_12 = new Collections.ObservableList<Part>();
             Plate plate3 = new Plate();
-            Material material3 = new Material();
             Collections.ObservableList<Part> observableList_13 = new Collections.ObservableList<Part>();
             topPanel = new System.Windows.Forms.FlowLayoutPanel();
             lblDrawingA = new System.Windows.Forms.Label();
@@ -218,15 +215,10 @@ namespace OpenNest.Forms
             cellView.Name = "cellView";
             cellView.OffsetIncrementDistance = 10D;
             cellView.OffsetTolerance = 0.001D;
-            material1.Density = 0D;
-            material1.Grade = null;
-            material1.Name = null;
-            plate1.Material = material1;
             plate1.Parts = observableList_11;
             plate1.PartSpacing = 0D;
             plate1.Quadrant = 1;
             plate1.Quantity = 0;
-            plate1.Thickness = 0D;
             cellView.Plate = plate1;
             cellView.RotateIncrementAngle = 10D;
             cellView.Size = new System.Drawing.Size(610, 677);
@@ -274,15 +266,10 @@ namespace OpenNest.Forms
             hPreview.Name = "hPreview";
             hPreview.OffsetIncrementDistance = 10D;
             hPreview.OffsetTolerance = 0.001D;
-            material2.Density = 0D;
-            material2.Grade = null;
-            material2.Name = null;
-            plate2.Material = material2;
             plate2.Parts = observableList_12;
             plate2.PartSpacing = 0D;
             plate2.Quadrant = 1;
             plate2.Quantity = 0;
-            plate2.Thickness = 0D;
             hPreview.Plate = plate2;
             hPreview.RotateIncrementAngle = 10D;
             hPreview.Size = new System.Drawing.Size(605, 313);
@@ -322,15 +309,10 @@ namespace OpenNest.Forms
             vPreview.Name = "vPreview";
             vPreview.OffsetIncrementDistance = 10D;
             vPreview.OffsetTolerance = 0.001D;
-            material3.Density = 0D;
-            material3.Grade = null;
-            material3.Name = null;
-            plate3.Material = material3;
             plate3.Parts = observableList_13;
             plate3.PartSpacing = 0D;
             plate3.Quadrant = 1;
             plate3.Quantity = 0;
-            plate3.Thickness = 0D;
             vPreview.Plate = plate3;
             vPreview.RotateIncrementAngle = 10D;
             vPreview.Size = new System.Drawing.Size(605, 320);