| /trunk/Widow/DrawOverlayForm.cs |
|---|
| @@ -0,0 +1,112 @@ |
|---|
| using System; |
| using System.Drawing; |
| using System.Linq; |
| using System.Windows.Forms; |
| |
| namespace Widow |
| { |
| public partial class DrawOverlayForm : Form |
| { |
| public event EventHandler<WindowDrawnEventArgs> WindowDrawn; |
| #region Public Enums, Properties and Fields |
| |
| public bool IsMouseDown { get; set; } |
| |
| public Point StartLocation { get; set; } |
| |
| public Point StopLocation { get; set; } |
| |
| public SolidBrush DrawBrush { get; } |
| |
| public SolidBrush FormBrush { get; } |
| |
| #endregion |
| |
| #region Private Delegates, Events, Enums, Properties, Indexers and Fields |
| |
| private Point CurrentLocation { get; set; } |
| |
| private volatile Bitmap _bitmap; |
| |
| #endregion |
| |
| #region Constructors, Destructors and Finalizers |
| |
| public DrawOverlayForm() |
| { |
| InitializeComponent(); |
| |
| DrawBrush = new SolidBrush(Color.Green); |
| FormBrush = new SolidBrush(Color.White); |
| } |
| |
| #endregion |
| |
| #region Event Handlers |
| |
| private void DrawOverlayForm_MouseDown(object sender, MouseEventArgs e) |
| { |
| IsMouseDown = true; |
| StartLocation = e.Location; |
| } |
| |
| private void DrawOverlayForm_MouseUp(object sender, MouseEventArgs e) |
| { |
| IsMouseDown = false; |
| StopLocation = e.Location; |
| |
| var left = Math.Min(StartLocation.X, StopLocation.X); |
| var top = Math.Min(StartLocation.Y, StopLocation.Y); |
| var width = Math.Abs(StopLocation.X - StartLocation.X); |
| var height = Math.Abs(StopLocation.Y - StartLocation.Y); |
| |
| WindowDrawn?.Invoke(this, new WindowDrawnEventArgs(left, top, width, height)); |
| |
| Close(); |
| } |
| |
| private void DrawOverlayForm_MouseMove(object sender, MouseEventArgs e) |
| { |
| CurrentLocation = e.Location; |
| |
| if (!IsMouseDown) |
| { |
| return; |
| } |
| |
| var selection = new Rectangle( |
| Math.Min(StartLocation.X, CurrentLocation.X), |
| Math.Min(StartLocation.Y, CurrentLocation.Y), |
| Math.Abs(StartLocation.X - CurrentLocation.X), |
| Math.Abs(StartLocation.Y - CurrentLocation.Y)); |
| |
| _bitmap = new Bitmap(Width, Height); |
| |
| using (var canvas = Graphics.FromImage(_bitmap)) |
| { |
| canvas.Clear(Color.White); |
| canvas.FillRectangle(DrawBrush, selection); |
| } |
| |
| Invalidate(); |
| Update(); |
| } |
| |
| private void DrawOverlayForm_Paint(object sender, PaintEventArgs e) |
| { |
| if (_bitmap == null) |
| { |
| return; |
| } |
| |
| var graphics = e.Graphics; |
| |
| graphics.DrawImage(_bitmap, Location.X, Location.Y, Width, Height); |
| |
| _bitmap?.Dispose(); |
| _bitmap = null; |
| } |
| |
| #endregion |
| } |
| } |
