3rdpartylibs/fastreports.wpf/FastReport.DesignExt/Controls/LineWidthComboBox.cs

using FastReport.Utils;
using System;
using System.ComponentModel;
using System.Windows.Forms;

namespace FastReport.Controls
{
    internal class LineWidthComboBox : ComboBox
    {
        private float lineWidth;
        private float[] stdWidths;

        public event EventHandler WidthSelected;

        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public new ObjectCollection Items
        {
            get { return base.Items; }
        }

        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public float LineWidth
        {
            get
            {
                string s = Text;
                if (s.StartsWith("."))
                    s = "0" + s;
                float width = String.IsNullOrEmpty(s) ? 0 : Converter.StringToFloat(s);
                LineWidth = width;
                return width;
            }
            set
            {
                lineWidth = value;
                bool found = false;
                for (int i = 0; i < stdWidths.Length; i++)
                {
                    if (Math.Abs(value - stdWidths[i]) < 1e-4)
                    {
                        Text = (string)Items[i];
                        found = true;
                        break;
                    }
                }
                if (!found)
                {
                    SelectedIndex = -1;
                    Text = Converter.DecreasePrecision(lineWidth, 3).ToString();
                }
            }
        }

        private void OnWidthSelected()
        {
            if (WidthSelected != null)
                WidthSelected(this, EventArgs.Empty);
        }

        protected override void OnKeyDown(KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                float w = LineWidth;
                OnWidthSelected();
            }
        }

        protected override void OnSelectedIndexChanged(EventArgs e)
        {
            base.OnSelectedIndexChanged(e);
            OnWidthSelected();
        }

        public LineWidthComboBox()
        {
            stdWidths = new float[] { 0.25f, 0.5f, 1, 1.5f, 2, 3, 4, 6 };
            Items.AddRange(new string[] {
        "0.25", "0.5", "1", "1.5", "2", "3", "4", "6" });
        }
    }
}