Added snap to edge of window feature

SpotSharp.Tests/SpotSharpTests.cs

@@ -6,7 +6,7 @@ namespace SpotSharp.Tests
     [TestClass]
     public class SpotSharpTests
     {
-        const string Host = "http://192.168.3.174:5051";
+        const string Host = "http://192.168.3.175:5051";
         readonly SpotClient _spot = new SpotClient(Host);
 
         [TestMethod]

SpotSharp/SpotClient.cs

@@ -27,7 +27,8 @@ public string Playing()
         public Image AlbumArt()
         {
             var bits = Get("/playing.png").RawBytes;
-            if (bits == null) return ServerDownImage();
+            if (bits == null || bits.Length<10) 
+                return ServerDownImage();
             return Image.FromStream(new MemoryStream(bits));
         }
 

WindowSpot/Main.cs

@@ -3,13 +3,16 @@
 using System.Threading.Tasks;
 using System.Windows.Forms;
 using SpotSharp;
+using System.Runtime.InteropServices;
 using Timer = System.Threading.Timer;
 
 namespace WindowSpot
 {
     public partial class Main : Form
     {
         SpotClient _spot;
+        private const int SnapInDistance = 50;
+
 
         public Main()
         {
@@ -74,7 +77,7 @@ private void NextClicked(object sender, EventArgs e)
 
         private void BackClicked(object sender, EventArgs e)
         {
-            _spot.Back();
+               _spot.Back();
         }
 
         private void SayIt(object sender, KeyEventArgs e)
@@ -111,6 +114,66 @@ private void Poll(object sender, EventArgs e)
         {
             Sync();
         }
+
+
+        public struct WindowPos
+        {
+            public IntPtr hwnd;
+            public IntPtr hwndInsertAfter;
+            public int x;
+            public int y;
+            public int cx;
+            public int cy;
+            public uint flags;
+        }
+
+        private const int WM_WINDOWPOSCHANGING = 0x46;
+
+        protected override void WndProc(ref Message m)
+        {
+            bool Snapped = false;
+            if ((m.Msg == WM_WINDOWPOSCHANGING) && (Properties.Settings.Default.SnapToEdge))
+                {
+                 Screen scn = Screen.FromPoint(this.Location);
+                WindowPos mwp;
+                mwp = (WindowPos)Marshal.PtrToStructure(m.LParam, typeof(WindowPos));
+                if (mwp.x != 0)
+                {
+                    // Left
+                    if (mwp.x <= (scn.WorkingArea.Left + SnapInDistance))
+                    {
+                        mwp.x = scn.WorkingArea.Left;
+                        Snapped = true;
+                    }
+                    // Right
+                    if ((mwp.x + mwp.cx) >= (scn.WorkingArea.Right - SnapInDistance))
+                    {
+                        mwp.x = scn.WorkingArea.Right - mwp.cx;
+                        Snapped = true;
+                    }
+                    // Top
+                    if (mwp.y <= (scn.WorkingArea.Top + SnapInDistance))
+                    {
+                        mwp.y = scn.WorkingArea.Top;
+                        Snapped = true;
+                    }
+                    // Bottom
+                    if ((mwp.y + mwp.cy) >= (scn.WorkingArea.Bottom - SnapInDistance))
+                    {
+                        mwp.y = scn.WorkingArea.Bottom - mwp.cy;
+                        Snapped = true;
+                    }
+                    // Keep from moving off the screen
+                    if (mwp.x < scn.WorkingArea.Left) mwp.x = scn.WorkingArea.Left;
+                    if ((mwp.x + mwp.cx) > scn.WorkingArea.Right) mwp.x = scn.WorkingArea.Right - mwp.cx;
+                    if (mwp.y < scn.WorkingArea.Top) mwp.y = scn.WorkingArea.Top;
+                    if ((mwp.y + mwp.cy) > scn.WorkingArea.Bottom) mwp.y = scn.WorkingArea.Bottom - mwp.cy;
+                    Marshal.StructureToPtr(mwp, (IntPtr)m.LParam,false);
+                }
+                m.Result = (IntPtr)0;
+                }
+            base.WndProc(ref m);
+            }
     }
 
     internal class SpotState

WindowSpot/Setup.cs

@@ -21,13 +21,21 @@ private void SaveClicked(object sender, EventArgs e)
         {
             DialogResult = DialogResult.OK;
             Properties.Settings.Default.Host = txtHost.Text;
+            Properties.Settings.Default.SnapToEdge = cboxSnapToEdge.Checked;
             Properties.Settings.Default.Save();
             Close();
         }
 
         private void Setup_Load(object sender, EventArgs e)
         {
             txtHost.Text = Properties.Settings.Default.Host;
+            cboxSnapToEdge.Checked = Properties.Settings.Default.SnapToEdge;
+        }
+
+        private void button1_Click(object sender, EventArgs e)
+        {
+            DialogResult = DialogResult.Cancel;
+            Close();
         }
     }
 }