feat: add FileListControl owner-drawn file list
This commit is contained in:
231
OpenNest/Controls/FileListControl.cs
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231
OpenNest/Controls/FileListControl.cs
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// OpenNest/Controls/FileListControl.cs
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using OpenNest.Bending;
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using OpenNest.Geometry;
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Linq;
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using System.Windows.Forms;
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namespace OpenNest.Controls
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{
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public class FileListItem
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{
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public string Name { get; set; }
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public string Customer { get; set; }
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public int Quantity { get; set; } = 1;
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public string Path { get; set; }
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public List<Entity> Entities { get; set; } = new();
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public List<Bend> Bends { get; set; } = new();
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public Box Bounds { get; set; }
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public int EntityCount { get; set; }
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}
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public class FileListControl : Control
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{
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private readonly List<FileListItem> items = new();
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private int selectedIndex = -1;
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private int hoveredIndex = -1;
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private int scrollOffset;
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private const int ItemHeight = 48;
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private const int AccentBarWidth = 3;
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private readonly SolidBrush selectedBrush = new SolidBrush(Color.FromArgb(230, 238, 255));
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private readonly SolidBrush hoveredBrush = new SolidBrush(Color.FromArgb(242, 245, 250));
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private readonly SolidBrush accentBrush = new SolidBrush(Color.FromArgb(60, 120, 216));
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private readonly Pen separatorPen = new Pen(Color.FromArgb(230, 230, 230));
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private readonly SolidBrush emptyStateBrush = new SolidBrush(Color.FromArgb(160, 160, 160));
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public event EventHandler<int> SelectedIndexChanged;
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public event EventHandler<FileListItem> ItemRightClicked;
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public FileListControl()
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{
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SetStyle(
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ControlStyles.AllPaintingInWmPaint |
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ControlStyles.OptimizedDoubleBuffer |
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ControlStyles.UserPaint |
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ControlStyles.ResizeRedraw, true);
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BackColor = Color.White;
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Font = new Font("Segoe UI", 9f);
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}
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public IReadOnlyList<FileListItem> Items => items;
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public int SelectedIndex => selectedIndex;
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public FileListItem SelectedItem =>
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selectedIndex >= 0 && selectedIndex < items.Count
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? items[selectedIndex]
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: null;
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public void AddItem(FileListItem item)
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{
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items.Add(item);
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if (items.Count == 1) selectedIndex = 0;
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Invalidate();
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}
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public void RemoveAt(int index)
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{
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items.RemoveAt(index);
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if (selectedIndex >= items.Count)
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selectedIndex = items.Count - 1;
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Invalidate();
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SelectedIndexChanged?.Invoke(this, selectedIndex);
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}
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public void Clear()
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{
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items.Clear();
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selectedIndex = -1;
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scrollOffset = 0;
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Invalidate();
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}
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public void InsertItems(int index, IEnumerable<FileListItem> newItems)
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{
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items.InsertRange(index, newItems);
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Invalidate();
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}
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protected override void OnPaint(PaintEventArgs e)
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{
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base.OnPaint(e);
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var g = e.Graphics;
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g.SmoothingMode = SmoothingMode.HighQuality;
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g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
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if (items.Count == 0)
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{
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DrawEmptyState(g);
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return;
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}
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var boldFont = new Font(Font, FontStyle.Bold);
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var smallFont = new Font("Segoe UI", 8f);
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var mutedBrush = new SolidBrush(Color.FromArgb(130, 130, 130));
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var textBrush = new SolidBrush(ForeColor);
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for (var i = 0; i < items.Count; i++)
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{
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var y = i * ItemHeight - scrollOffset;
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if (y + ItemHeight < 0 || y > Height) continue;
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var item = items[i];
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var rect = new Rectangle(0, y, Width, ItemHeight);
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// Background
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if (i == selectedIndex)
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g.FillRectangle(selectedBrush, rect);
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else if (i == hoveredIndex)
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g.FillRectangle(hoveredBrush, rect);
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// Accent bar
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if (i == selectedIndex)
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g.FillRectangle(accentBrush, 0, y, AccentBarWidth, ItemHeight);
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// Name
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var nameRect = new Rectangle(AccentBarWidth + 8, y + 6, Width - 70, 20);
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TextRenderer.DrawText(g, item.Name, boldFont, nameRect, ForeColor, TextFormatFlags.Left | TextFormatFlags.EndEllipsis);
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// Dimensions + entity count
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var bounds = item.Bounds;
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var dimText = bounds != null
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? $"{bounds.Width:0.#} x {bounds.Length:0.#} — {item.EntityCount} entities"
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: $"{item.EntityCount} entities";
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var dimRect = new Rectangle(AccentBarWidth + 8, y + 26, Width - 70, 16);
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TextRenderer.DrawText(g, dimText, smallFont, dimRect, Color.FromArgb(130, 130, 130), TextFormatFlags.Left);
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// Quantity badge
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var qtyText = $"x{item.Quantity}";
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var qtyRect = new Rectangle(Width - 50, y + 12, 40, 24);
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TextRenderer.DrawText(g, qtyText, Font, qtyRect, Color.FromArgb(100, 100, 100), TextFormatFlags.Right | TextFormatFlags.VerticalCenter);
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// Separator
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if (i < items.Count - 1)
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g.DrawLine(separatorPen, AccentBarWidth + 8, y + ItemHeight - 1, Width - 8, y + ItemHeight - 1);
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}
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boldFont.Dispose();
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smallFont.Dispose();
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mutedBrush.Dispose();
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textBrush.Dispose();
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}
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private void DrawEmptyState(Graphics g)
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{
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var text = "Drop DXF files here\nor click Add Files...";
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var size = g.MeasureString(text, Font);
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var x = (Width - size.Width) / 2;
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var y = (Height - size.Height) / 2;
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g.DrawString(text, Font, emptyStateBrush, x, y,
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new StringFormat { Alignment = StringAlignment.Center });
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}
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protected override void OnMouseClick(MouseEventArgs e)
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{
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base.OnMouseClick(e);
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var index = GetIndexAt(e.Y);
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if (index < 0 || index >= items.Count) return;
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if (e.Button == MouseButtons.Right)
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{
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selectedIndex = index;
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Invalidate();
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SelectedIndexChanged?.Invoke(this, selectedIndex);
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ItemRightClicked?.Invoke(this, items[index]);
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return;
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}
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if (index != selectedIndex)
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{
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selectedIndex = index;
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Invalidate();
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SelectedIndexChanged?.Invoke(this, selectedIndex);
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}
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}
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protected override void OnMouseMove(MouseEventArgs e)
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{
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base.OnMouseMove(e);
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var index = GetIndexAt(e.Y);
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if (index != hoveredIndex)
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{
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hoveredIndex = index;
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Invalidate();
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}
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}
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protected override void OnMouseLeave(EventArgs e)
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{
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base.OnMouseLeave(e);
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hoveredIndex = -1;
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Invalidate();
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}
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protected override void OnMouseWheel(MouseEventArgs e)
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{
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base.OnMouseWheel(e);
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var maxScroll = System.Math.Max(0, items.Count * ItemHeight - Height);
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scrollOffset = System.Math.Max(0, System.Math.Min(maxScroll, scrollOffset - e.Delta));
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Invalidate();
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}
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private int GetIndexAt(int y) => (y + scrollOffset) / ItemHeight;
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protected override void Dispose(bool disposing)
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{
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if (disposing)
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{
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selectedBrush.Dispose();
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hoveredBrush.Dispose();
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accentBrush.Dispose();
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separatorPen.Dispose();
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emptyStateBrush.Dispose();
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}
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base.Dispose(disposing);
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}
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}
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}
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