3rdpartylibs/fastreports.wpf/FastReport/QueryBuilder/DataBaseView.cs

using FastReport.Utils;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;

namespace FastReport.FastQueryBuilder
{
    internal class DataBaseView : ListBox
    {
        private Rectangle dragBoxFromMouseDown;

        public Table SelectedTable => SelectedItem as Table;

        public DataBaseView()
        {
            DrawMode = DrawMode.OwnerDrawFixed;
            IntegralHeight = false;
        }

        public void FillTableList(List<Table> tl)
        {
            BeginUpdate();
            Items.Clear();
            foreach (Table tbl in tl)
            {
                Items.Add(tbl);
            }
            EndUpdate();
        }

        protected override void OnDrawItem(DrawItemEventArgs e)
        {
            e.DrawBackground();
            if (e.Index >= 0)
            {
                this.DrawImageAndText(e, this.GetImage(222), Items[e.Index].ToString());
            }
        }

        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);
            if (SelectedItem != null)
            {
                Size dragSize = SystemInformation.DragSize;
                dragBoxFromMouseDown = new Rectangle(new Point(e.X - (dragSize.Width / 2),
                                                               e.Y - (dragSize.Height / 2)), dragSize);
            }
            else
                dragBoxFromMouseDown = Rectangle.Empty;
        }

        protected override void OnMouseMove(MouseEventArgs e)
        {
            base.OnMouseMove(e);
            if ((e.Button & MouseButtons.Left) == MouseButtons.Left)
            {
                if ((dragBoxFromMouseDown != Rectangle.Empty) &&
                    !dragBoxFromMouseDown.Contains(e.X, e.Y))
                {
                    DoDragDrop(SelectedItem, DragDropEffects.Copy);
                }
            }
        }

        protected override void OnMouseUp(MouseEventArgs e)
        {
            base.OnMouseUp(e);
            dragBoxFromMouseDown = Rectangle.Empty;
        }

        public void UpdateDpiDependencies()
        {
            ItemHeight = this.LogicalToDevice(18);
        }
    }
}