tbf/TBF/UI/Calendar/EventToolTipCtrl.cs

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace TBF.UI.Calendar
{
    internal partial class EventToolTipCtrl : UserControl
    {
        private Color _eventToolTipColor;
        private Color _eventToolTipTextColor;
        private Color _eventToolTipBorderColor;
        private Font _eventToolTipFont;
        private bool _shouldRender;
        private string _eventToolTipText;
        private Margin _eventToolTipMargins;

        public Margin EventToolTipMargins
        {
            get { return _eventToolTipMargins; }
            set
            {
                _eventToolTipMargins = value;
                Refresh();
            }
        }

        public string EventToolTipText
        {
            get { return _eventToolTipText; }
            set
            {
                _eventToolTipText = value;
                Refresh();
            }
        }

        public bool ShouldRender
        {
            get { return _shouldRender; }
            set
            {
                _shouldRender = value;
                Refresh();
            }
        }

        public Font EventToolTipFont
        {
            get { return _eventToolTipFont; }
            set
            {
                _eventToolTipFont = value;
                Refresh();
            }
        }

        public Color EventToolTipBorderColor
        {
            get { return _eventToolTipBorderColor; }
            set
            {
                _eventToolTipBorderColor = value;
                Refresh();
            }
        }

        public Color EventToolTipTextColor
        {
            get { return _eventToolTipTextColor; }
            set
            {
                _eventToolTipTextColor = value;
                Refresh();
            }
        }

        public Color EventToolTipColor
        {
            get { return _eventToolTipColor; }
            set
            {
                _eventToolTipColor = value;
                Refresh();
            }
        }

        public EventToolTipCtrl()
        {
            InitializeComponent();

            _shouldRender = false;
            _eventToolTipBorderColor = Color.Black;
            _eventToolTipColor = Color.Yellow;
            _eventToolTipFont = new Font("Arial", 10, FontStyle.Regular);
            _eventToolTipText = "";
            _eventToolTipTextColor = Color.Black;
            _eventToolTipMargins = new Margin { Top = 10, Right = 10, Bottom = 10, Left = 10 };
        }

        private void EventToolTipLoad(object sender, EventArgs e)
        {

        }

        public Size CalculateSize()
        {
            Graphics g = CreateGraphics();

            SizeF textSize = g.MeasureString(_eventToolTipText, _eventToolTipFont);

            Size = new Size((int)textSize.Width + _eventToolTipMargins.Left + _eventToolTipMargins.Right,
                                           (int)textSize.Height + _eventToolTipMargins.Top + _eventToolTipMargins.Bottom);

            g.Dispose();
            return Size;
        }

        private void EventToolTipPaint(object sender, PaintEventArgs e)
        {
            if (!_shouldRender)
                return;

            SizeF textSize = e.Graphics.MeasureString(_eventToolTipText, _eventToolTipFont);

            Size = new Size((int)textSize.Width + _eventToolTipMargins.Left + _eventToolTipMargins.Right,
                                           (int)textSize.Height + _eventToolTipMargins.Top + _eventToolTipMargins.Bottom);

            var bmp = new Bitmap(ClientSize.Width, ClientSize.Height);
            Graphics g = Graphics.FromImage(bmp);
            GraphicsPath gp = Common.UIControls.RoundedRectangle.Create(0, 0, ClientSize.Width - 1, ClientSize.Height - 1, 5,
                                                      Common.UIControls.RoundedRectangle.RectangleCorners.All);

            BackColor = Color.Transparent;
            g.FillPath(new SolidBrush(_eventToolTipColor), gp);
            g.DrawPath(new Pen(_eventToolTipBorderColor), gp);

            int totHorMargin = _eventToolTipMargins.Left + _eventToolTipMargins.Right;
            int totVerMargin = _eventToolTipMargins.Top + _eventToolTipMargins.Bottom;

            g.DrawString(_eventToolTipText, _eventToolTipFont, new SolidBrush(_eventToolTipTextColor),
                         (ClientSize.Width - textSize.Width + totHorMargin) / 2f - _eventToolTipMargins.Right,
                         (ClientSize.Height - textSize.Height + totVerMargin) / 2f - _eventToolTipMargins.Bottom - 1);


            e.Graphics.DrawImage(bmp, 0, 0);
            gp.Dispose();
            g.Dispose();
            bmp.Dispose();
        }
    }

    internal class Margin
    {
        public int Left
        {
            get;
            set;
        }

        public int Right
        {
            get;
            set;
        }

        public int Top
        {
            get;
            set;
        }

        public int Bottom
        {
            get;
            set;
        }
    }
}