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

using System;
using System.Windows.Forms;
using System.ComponentModel;
using System.Drawing.Drawing2D;
using System.Drawing;
using FastReport.Utils;

namespace FastReport.Controls
{
    internal class HatchComboBox : ComboBox
    {
        private bool updating;
        public event EventHandler HatchSelected;

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

        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public HatchStyle Style
        {
            get
            {
                if (SelectedItem == null)
                    return HatchStyle.BackwardDiagonal;
                return (HatchStyle)SelectedItem;
            }
            set
            {
                updating = true;
                SelectedItem = value;
                updating = false;
            }
        }

        protected override void OnDrawItem(DrawItemEventArgs e)
        {
            e.DrawBackground();
            if (e.Index >= 0)
            {
                Bitmap bmp = new Bitmap(this.LogicalToDevice(20), this.LogicalToDevice(20));
                HatchStyle style = (HatchStyle)Items[e.Index];

                using (Graphics g = Graphics.FromImage(bmp))
                using (Brush b = new HatchBrush(style, Color.Black, Color.White))
                {
                    Rectangle rect = new Rectangle(0, 0, bmp.Width - 1, bmp.Height - 1);
                    g.FillRectangle(b, rect);
                    g.DrawRectangle(Pens.Black, rect);
                }

                this.DrawImageAndText(e, bmp, style.ToString());
            }
        }

        protected override void OnSelectedIndexChanged(EventArgs e)
        {
            base.OnSelectedIndexChanged(e);
            if (updating)
                return;
            if (HatchSelected != null)
                HatchSelected(this, EventArgs.Empty);
        }

        private void UpdateItems()
        {
            HatchStyle[] styles = new HatchStyle[] {
                HatchStyle.BackwardDiagonal,
                HatchStyle.Cross,
                HatchStyle.DarkDownwardDiagonal,
                HatchStyle.DarkHorizontal,
                HatchStyle.DarkUpwardDiagonal,
                HatchStyle.DarkVertical,
                HatchStyle.DashedDownwardDiagonal,
                HatchStyle.DashedHorizontal,
                HatchStyle.DashedUpwardDiagonal,
                HatchStyle.DashedVertical,
                HatchStyle.DiagonalBrick,
                HatchStyle.DiagonalCross,
                HatchStyle.Divot,
                HatchStyle.DottedDiamond,
                HatchStyle.DottedGrid,
                HatchStyle.ForwardDiagonal,
                HatchStyle.Horizontal,
                HatchStyle.HorizontalBrick,
                HatchStyle.LargeCheckerBoard,
                HatchStyle.LargeConfetti,
                HatchStyle.LightDownwardDiagonal,
                HatchStyle.LightHorizontal,
                HatchStyle.LightUpwardDiagonal,
                HatchStyle.LightVertical,
                HatchStyle.NarrowHorizontal,
                HatchStyle.NarrowVertical,
                HatchStyle.OutlinedDiamond,
                HatchStyle.Percent05,
                HatchStyle.Percent10,
                HatchStyle.Percent20,
                HatchStyle.Percent25,
                HatchStyle.Percent30,
                HatchStyle.Percent40,
                HatchStyle.Percent50,
                HatchStyle.Percent60,
                HatchStyle.Percent70,
                HatchStyle.Percent75,
                HatchStyle.Percent80,
                HatchStyle.Percent90,
                HatchStyle.Plaid,
                HatchStyle.Shingle,
                HatchStyle.SmallCheckerBoard,
                HatchStyle.SmallConfetti,
                HatchStyle.SmallGrid,
                HatchStyle.SolidDiamond,
                HatchStyle.Sphere,
                HatchStyle.Trellis,
                HatchStyle.Vertical,
                HatchStyle.Weave,
                HatchStyle.WideDownwardDiagonal,
                HatchStyle.WideUpwardDiagonal,
                HatchStyle.ZigZag };
            Items.Clear();
            foreach (HatchStyle style in styles)
            {
                Items.Add(style);
            }
        }

        public HatchComboBox()
        {
            DrawMode = DrawMode.OwnerDrawFixed;
            DropDownStyle = ComboBoxStyle.DropDownList;
            ItemHeight = 24;
            IntegralHeight = false;
            UpdateItems();
        }
    }
}