99 lines
3.1 KiB
C#
99 lines
3.1 KiB
C#
using System;
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using System.ComponentModel;
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using System.Drawing;
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using System.Windows.Forms;
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namespace Volian.Controls.Library
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{
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public partial class BorderListBox : ListBox
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{
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#region Properties
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public GridLinePattern SelectedLinePattern => (Items[SelectedIndex] as GridLBItem).LinePattern;
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#endregion
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#region ctor
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public BorderListBox(IContainer container)
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{
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container.Add(this);
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InitializeComponent();
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SetupOptions();
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}
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private void SetupOptions()
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{
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this.DrawMode = DrawMode.OwnerDrawFixed;
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DrawItem += new DrawItemEventHandler(BorderListBox_DrawItem);
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Items.Add(new GridLBItem(GridLinePattern.None));
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Items.Add(new GridLBItem(GridLinePattern.Single));
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Items.Add(new GridLBItem(GridLinePattern.Double));
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Items.Add(new GridLBItem(GridLinePattern.Thick));
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Items.Add(new GridLBItem(GridLinePattern.Dashed));
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Items.Add(new GridLBItem(GridLinePattern.Dotted));
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SelectedIndex = 1;
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}
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public void SetupFontAndSize(int fontSize)
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{
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Font = new Font(Font.FontFamily, fontSize, Font.Style);
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using (Graphics gr = CreateGraphics())
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{
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SizeF mySize = gr.MeasureString("Almg", Font);
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ItemHeight = (int)Math.Ceiling(mySize.Height);
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}
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int newHeight = Items.Count * ItemHeight + 4;
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Size = new Size(newHeight, newHeight);
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}
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#endregion
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#region Event Handlers
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private int _MaxLabelWidth = 0;
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private int MaxLabelWidth(Graphics gr)
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{
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if(_MaxLabelWidth == 0)
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{
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for(int i=0;i<Items.Count;i++)
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_MaxLabelWidth = Math.Max(_MaxLabelWidth,(int) gr.MeasureString("XX" + Items[0].ToString(), Font).Width);
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}
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return _MaxLabelWidth;
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}
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private void BorderListBox_DrawItem(object sender, DrawItemEventArgs e)
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{
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e.DrawBackground();
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e.DrawFocusRectangle();
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int y = (e.Bounds.Top + e.Bounds.Bottom) / 2;
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GridLBItem myGridLBItem = Items[e.Index] as GridLBItem;
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Brush myBrush = new SolidBrush(e.ForeColor);
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e.Graphics.DrawString(myGridLBItem.LinePattern.ToString(), Font, myBrush, e.Bounds);
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Pen pn = VlnBorders.LinePen(myGridLBItem.LinePattern, e.ForeColor);
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int leftMargin = MaxLabelWidth(e.Graphics);
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int rightMargin = 4;
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switch (myGridLBItem.LinePattern)
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{
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case GridLinePattern.Double:
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e.Graphics.DrawLine(pn, e.Bounds.Left + leftMargin, y + 1, e.Bounds.Right - rightMargin, y + 1);
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e.Graphics.DrawLine(pn, e.Bounds.Left + leftMargin, y - 1, e.Bounds.Right - rightMargin, y - 1);
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break;
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case GridLinePattern.None:
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break;
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case GridLinePattern.Single:
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case GridLinePattern.Thick:
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case GridLinePattern.Dotted:
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case GridLinePattern.Dashed:
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case GridLinePattern.Mixed:
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default:
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e.Graphics.DrawLine(pn, e.Bounds.Left + leftMargin, y, e.Bounds.Right - rightMargin, y);
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break;
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}
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}
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#endregion
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}
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public class GridLBItem
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{
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#region Properties
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public GridLinePattern LinePattern { get; set; }
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#endregion
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#region ctor
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public GridLBItem(GridLinePattern linePattern) => LinePattern = linePattern;
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#endregion
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#region Public Methods
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public override string ToString() => LinePattern.ToString();
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#endregion
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}
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}
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