Merge pull request #38 from ovpoddar/main

PR: Issue #34 - Add Mouse Scroll Functionality for Mac, Linux, and Windows

Author: lucassklp

Desktop.Robot/AbstractRobot.cs

@@ -75,5 +75,6 @@ protected void ApplyAutoDelay()
             }
         }
 
-    }
+        public abstract void MouseScrollVertical(int value);
+	}
 }

Desktop.Robot/Clicks/Linux/Common.cs

@@ -7,6 +7,8 @@ static class Common
         internal const int LEFT_BUTTON = 1;
         internal const int CENTER_BUTTON = 2;
         internal const int RIGHT_BUTTON = 3;
+        internal const int UP_BUTTON = 4;
+        internal const int DOWN_BUTTON = 5;
 
         [DllImport("./x11.os", EntryPoint = "click")]
         internal static extern void Click(bool down, int button);

Desktop.Robot/Desktop.Robot.csproj

@@ -22,11 +22,11 @@
   </ItemGroup>
 
   <ItemGroup>
-    <None Include="osx.os">
+	<None Include="osx.os">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <PackagePath>build\</PackagePath>
-      <Pack>true</Pack>
-    </None>
+	  <PackagePath>build\</PackagePath>
+	  <Pack>true</Pack>
+	</None>
     <None Include="x11.os">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
       <PackagePath>build\</PackagePath>

Desktop.Robot/IRobot.cs

@@ -20,6 +20,7 @@ public interface IRobot
         void Delay(uint ms);
         void MouseMove(uint x, uint y);
         void MouseMove(Point p);
+        void MouseScrollVertical(int value);
         Point GetMousePosition();
     }
 }

Desktop.Robot/Linux/Robot.cs

@@ -1,7 +1,9 @@
-using System;
+using Desktop.Robot.Clicks.Linux;
+using System;
 using System.Drawing;
 using System.Linq;
 using System.Runtime.InteropServices;
+using System.Threading;
 
 namespace Desktop.Robot.Linux
 {
@@ -85,5 +87,20 @@ public override void MouseMove(uint x, uint y)
         [DllImport("./x11.os", EntryPoint = "pressKeyCode")]
         private static extern IntPtr pressKeyCode(int code, bool down, int flags);
 
-    }
+		public override void MouseScrollVertical(int value)
+		{
+            if (value < 0)
+            {
+                click(true, Common.UP_BUTTON);
+                Thread.Sleep(value);
+                click(false, Common.UP_BUTTON);
+            }
+            else
+			{
+				click(true, Common.DOWN_BUTTON);
+				Thread.Sleep(value);
+				click(false, Common.DOWN_BUTTON);
+			}
+		}
+	}
 }

Desktop.Robot/OSX/Robot.cs

@@ -67,8 +67,12 @@ public override Point GetMousePosition()
             return new Point(coords[0], screenRes[1] - coords[1]);
         }
 
+		public override void MouseScrollVertical(int value)
+		{
+			verticalScroll(value);
+		}
 
-        [DllImport("./osx.os", EntryPoint = "setMousePosition")]
+		[DllImport("./osx.os", EntryPoint = "setMousePosition")]
         private static extern void setMousePosition(uint x, uint y);
 
         [DllImport("./osx.os", EntryPoint = "getMousePosition")]
@@ -94,5 +98,9 @@ public override Point GetMousePosition()
 
         [DllImport("./osx.os", EntryPoint = "sendCommandDown")]
         private static extern void sendCommandDown(ushort ch);
-    }
+
+        [DllImport("./osx.os", EntryPoint = "verticalScroll")]
+        private static extern void verticalScroll(int value);
+
+	}
 }

Desktop.Robot/Robot.cs

@@ -102,7 +102,12 @@ public void MouseMove(Point p)
             robot.MouseMove(p);
         }
 
-        public void MouseUp(IClick click)
+		public void MouseScrollVertical(int value)
+		{
+            robot.MouseScrollVertical(value);
+		}
+
+		public void MouseUp(IClick click)
         {
             robot.MouseUp(click);
         }

Desktop.Robot/Source/osx/main.mm

@@ -120,4 +120,17 @@ void sendCommand(short input){
         sendCommandDown(input);
         sendCommandUp(input);
     }
+
+    void verticalScroll(int value){
+        CGEventSourceRef eventSource = CGEventSourceCreate(kCGEventSourceStateHIDSystemState);
+        CGEventRef scrollEvent = CGEventCreateScrollWheelEvent(eventSource,
+                                                              kCGScrollEventUnitPixel,
+                                                              1,
+                                                              value);
+
+        CGEventPost(kCGHIDEventTap, scrollEvent);
+
+        CFRelease(scrollEvent);
+        CFRelease(eventSource);
+    }
 }