From d22957d2abb77f162ac5ef43a064a4ce056fc046 Mon Sep 17 00:00:00 2001
From: Michael <Michael@some.where>
Date: Mon, 24 Apr 2017 21:51:52 -0400
Subject: [PATCH] audio player scrubbing

---
 .../Applications/AudioPlayer.Designer.cs      | 15 +++++-
 ShiftOS.WinForms/Applications/AudioPlayer.cs  | 52 +++++++++++++++++++
 2 files changed, 66 insertions(+), 1 deletion(-)

diff --git a/ShiftOS.WinForms/Applications/AudioPlayer.Designer.cs b/ShiftOS.WinForms/Applications/AudioPlayer.Designer.cs
index 825413d..6263ff7 100644
--- a/ShiftOS.WinForms/Applications/AudioPlayer.Designer.cs
+++ b/ShiftOS.WinForms/Applications/AudioPlayer.Designer.cs
@@ -64,6 +64,7 @@ namespace ShiftOS.WinForms.Applications
             this.clearToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.shuffleToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.removeToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
+            this.loopToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             ((System.ComponentModel.ISupportInitialize)(this.wpaudio)).BeginInit();
             this.toolStripContainer1.ContentPanel.SuspendLayout();
             this.toolStripContainer1.TopToolStripPanel.SuspendLayout();
@@ -150,6 +151,9 @@ namespace ShiftOS.WinForms.Applications
             this.pgplaytime.Tag = "keepbg";
             this.pgplaytime.Text = "shiftedProgressBar1";
             this.pgplaytime.Value = 0;
+            this.pgplaytime.MouseDown += new System.Windows.Forms.MouseEventHandler(this.startScrub);
+            this.pgplaytime.MouseMove += new System.Windows.Forms.MouseEventHandler(this.pgplaytime_MouseMove);
+            this.pgplaytime.MouseUp += new System.Windows.Forms.MouseEventHandler(this.pgplaytime_MouseUp);
             // 
             // menuStrip1
             // 
@@ -158,7 +162,8 @@ namespace ShiftOS.WinForms.Applications
             this.addSongToolStripMenuItem,
             this.clearToolStripMenuItem,
             this.shuffleToolStripMenuItem,
-            this.removeToolStripMenuItem});
+            this.removeToolStripMenuItem,
+            this.loopToolStripMenuItem});
             this.menuStrip1.Location = new System.Drawing.Point(0, 0);
             this.menuStrip1.Name = "menuStrip1";
             this.menuStrip1.Size = new System.Drawing.Size(798, 24);
@@ -193,6 +198,13 @@ namespace ShiftOS.WinForms.Applications
             this.removeToolStripMenuItem.Text = "Remove";
             this.removeToolStripMenuItem.Click += new System.EventHandler(this.removeToolStripMenuItem_Click);
             // 
+            // loopToolStripMenuItem
+            // 
+            this.loopToolStripMenuItem.CheckOnClick = true;
+            this.loopToolStripMenuItem.Name = "loopToolStripMenuItem";
+            this.loopToolStripMenuItem.Size = new System.Drawing.Size(46, 20);
+            this.loopToolStripMenuItem.Text = "Loop";
+            // 
             // AudioPlayer
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
@@ -229,5 +241,6 @@ namespace ShiftOS.WinForms.Applications
         private System.Windows.Forms.FlowLayoutPanel flcontrols;
         private System.Windows.Forms.Button btnplay;
         private Controls.ShiftedProgressBar pgplaytime;
+        private System.Windows.Forms.ToolStripMenuItem loopToolStripMenuItem;
     }
 }
diff --git a/ShiftOS.WinForms/Applications/AudioPlayer.cs b/ShiftOS.WinForms/Applications/AudioPlayer.cs
index 3edf965..28e1c56 100644
--- a/ShiftOS.WinForms/Applications/AudioPlayer.cs
+++ b/ShiftOS.WinForms/Applications/AudioPlayer.cs
@@ -160,6 +160,23 @@ namespace ShiftOS.WinForms.Applications
                     }));
                     Thread.Sleep(50);
                 }
+                if (o.PlaybackState == NAudio.Wave.PlaybackState.Stopped)
+                {
+                    if (lbtracks.SelectedIndex < lbtracks.Items.Count - 1)
+                    {
+                        this.Invoke(new Action(() =>
+                        {
+                            lbtracks.SelectedIndex++;
+                        }));
+                    }
+                    else if(loopToolStripMenuItem.Checked == true)
+                    {
+                        this.Invoke(new Action(() =>
+                        {
+                            lbtracks.SelectedIndex = 0;
+                        }));
+                    }
+                }
             }).Start();
         }
 
@@ -171,6 +188,41 @@ namespace ShiftOS.WinForms.Applications
             }
             catch { }
         }
+
+        bool scrubbing = false;
+
+        private void startScrub(object sender, MouseEventArgs e)
+        {
+            scrubbing = true;
+        }
+
+        static public double linear(double x, double x0, double x1, double y0, double y1)
+        {
+            if ((x1 - x0) == 0)
+            {
+                return (y0 + y1) / 2;
+            }
+            return y0 + (x - x0) * (y1 - y0) / (x1 - x0);
+        }
+
+        private void pgplaytime_MouseMove(object sender, MouseEventArgs e)
+        {
+            if (mp3 != null)
+                try
+                {
+                    if (scrubbing)
+                    {
+                        long s_pos = (long)linear(e.X, 0, pgplaytime.Width, 0, (double)mp3.Length);
+                        mp3.Position = s_pos;
+                    }
+                }
+                catch { }
+        }
+
+        private void pgplaytime_MouseUp(object sender, MouseEventArgs e)
+        {
+            scrubbing = false;
+        }
     }
 
     public static class ListExtensions