Added translucent form for splitters

DarkUI/DarkUI.csproj

@@ -124,6 +124,9 @@
     <Compile Include="Forms\DarkMessageBox.Designer.cs">
       <DependentUpon>DarkMessageBox.cs</DependentUpon>
     </Compile>
+    <Compile Include="Forms\DarkTranslucentForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
     <Compile Include="Icons\MenuIcons.Designer.cs">
       <AutoGen>True</AutoGen>
       <DesignTime>True</DesignTime>

DarkUI/Docking/Items/DarkDockSplitter.cs

@@ -9,6 +9,7 @@ namespace DarkUI
 
         private Control _control;
         private DarkSplitterType _splitterType;
+        private DarkTranslucentForm _overlayForm;
 
         #endregion
 
@@ -26,6 +27,7 @@ namespace DarkUI
         {
             _control = control;
             _splitterType = splitterType;
+            _overlayForm = new DarkTranslucentForm(Color.Black);
 
             switch (_splitterType)
             {
@@ -44,6 +46,41 @@ namespace DarkUI
 
         #region Method Region
 
+        public void ShowOverlay()
+        {
+            _overlayForm.Show();
+            UpdateOverlay(new Point(0, 0));
+        }
+
+        public void HideOverlay()
+        {
+            _overlayForm.Hide();
+        }
+
+        public void UpdateOverlay(Point difference)
+        {
+            var bounds = _control.RectangleToScreen(Bounds);
+
+            switch (_splitterType)
+            {
+                case DarkSplitterType.Left:
+                    bounds.Location = new Point(bounds.Location.X - difference.X, bounds.Location.Y);
+                    break;
+                case DarkSplitterType.Right:
+                    bounds.Location = new Point(bounds.Location.X - difference.X, bounds.Location.Y);
+                    break;
+                case DarkSplitterType.Top:
+                    bounds.Location = new Point(bounds.Location.X, bounds.Location.Y - difference.Y);
+                    break;
+                case DarkSplitterType.Bottom:
+                    bounds.Location = new Point(bounds.Location.X, bounds.Location.Y - difference.Y);
+                    break;
+            }
+
+            _overlayForm.Location = bounds.Location;
+            _overlayForm.Size = bounds.Size;
+        }
+
         public void Move(Point difference)
         {
             switch (_splitterType)

DarkUI/Forms/DarkTranslucentForm.cs

@@ -0,0 +1,30 @@
+using System.Drawing;
+using System.Windows.Forms;
+
+namespace DarkUI
+{
+    internal class DarkTranslucentForm : Form
+    {
+        #region Property Region
+
+        protected override bool ShowWithoutActivation
+        {
+            get { return true; }
+        }
+
+        #endregion
+
+        #region Constructor Region
+
+        public DarkTranslucentForm(Color backColor, double opacity = 0.6)
+        {
+            FormBorderStyle = FormBorderStyle.None;
+            ShowInTaskbar = false;
+            AllowTransparency = true;
+            Opacity = opacity;
+            BackColor = backColor;
+        }
+
+        #endregion
+    }
+}

DarkUI/Win32/DarkDockResizeFilter.cs

@@ -10,6 +10,7 @@ namespace DarkUI
 
         private DarkDockPanel _dockPanel;
 
+        private Timer _dragTimer;
         private bool _isDragging;
         private Point _initialContact;
         private DarkDockSplitter _activeSplitter;
@@ -21,6 +22,10 @@ namespace DarkUI
         public DarkDockResizeFilter(DarkDockPanel dockPanel)
         {
             _dockPanel = dockPanel;
+
+            _dragTimer = new Timer();
+            _dragTimer.Interval = 1;
+            _dragTimer.Tick += DragTimer_Tick;
         }
 
         #endregion
@@ -100,22 +105,45 @@ namespace DarkUI
 
         #endregion
 
+        #region Event Handler Region
+
+        private void DragTimer_Tick(object sender, EventArgs e)
+        {
+            if (_dockPanel.MouseButtonState != MouseButtons.Left)
+                _isDragging = false;
+
+            if (!_isDragging)
+            {
+                _activeSplitter.HideOverlay();
+                _dragTimer.Stop();
+                ResetCursor();
+                return;
+            }
+
+            var difference = new Point(_initialContact.X - Cursor.Position.X, _initialContact.Y - Cursor.Position.Y);
+            _activeSplitter.UpdateOverlay(difference);
+        }
+
+        #endregion
+
         #region Method Region
 
         private void StartDrag(DarkDockSplitter splitter)
         {
-            Console.WriteLine("Start drag");
-
             _activeSplitter = splitter;
             Cursor.Current = _activeSplitter.ResizeCursor;
 
             _initialContact = Cursor.Position;
             _isDragging = true;
+
+            _activeSplitter.ShowOverlay();
+            _dragTimer.Start();
         }
 
         private void StopDrag()
         {
-            Console.WriteLine("Stop drag");
+            _activeSplitter.HideOverlay();
+            _dragTimer.Stop();
 
             var difference = new Point(_initialContact.X - Cursor.Position.X, _initialContact.Y - Cursor.Position.Y);
             _activeSplitter.Move(difference);

DarkUI/Win32/Native.cs

@@ -4,12 +4,12 @@ using System.Runtime.InteropServices;
 
 namespace DarkUI
 {
-    public sealed class Native
+    internal sealed class Native
     {
         [DllImport("user32.dll")]
-        public static extern IntPtr WindowFromPoint(Point point);
+        internal static extern IntPtr WindowFromPoint(Point point);
 
         [DllImport("user32.dll", CharSet = CharSet.Auto)]
-        public static extern IntPtr SendMessage(IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam);
+        internal static extern IntPtr SendMessage(IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam);
     }
 }

DarkUI/Win32/WindowsMessages.cs

@@ -7,7 +7,7 @@ namespace DarkUI
     /// Defined in winuser.h from Windows SDK v6.1
     /// Documentation pulled from MSDN.
     /// </summary>
-    public enum WM : uint
+    internal enum WM : uint
     {
         /// <summary>
         /// The WM_NULL message performs no operation. An application sends the WM_NULL message if it wants to post a message that the recipient window will ignore.