Fixing residual characters.

Fixing residual characters issue at end of list, with screen size.

Increasing keyboard buffer size

Increasing steps in a scroll, similar to htop

cmd/mop/main.go

@@ -51,7 +51,7 @@ func mainLoop(screen *mop.Screen, profile *mop.Profile) {
 	termbox.SetInputMode(termbox.InputMouse)
 
 	// use buffered channel for keyboard event queue
-	keyboardQueue := make(chan termbox.Event, 16)
+	keyboardQueue := make(chan termbox.Event, 128)
 
 	timestampQueue := time.NewTicker(1 * time.Second)
 	quotesQueue := time.NewTicker(5 * time.Second)
@@ -142,10 +142,10 @@ loop:
 				if lineEditor == nil && columnEditor == nil && !showingHelp {
 					switch event.Key {
 					case termbox.MouseWheelUp:
-						screen.DecreaseOffset(1)
+						screen.DecreaseOffset(5)
 						redrawQuotesFlag = true
 					case termbox.MouseWheelDown:
-						screen.IncreaseOffset(1, len(profile.Tickers))
+						screen.IncreaseOffset(5, len(profile.Tickers))
 						redrawQuotesFlag = true
 					}
 				}
@@ -169,6 +169,7 @@ loop:
 
 		if redrawQuotesFlag && len(keyboardQueue) == 0 {
 			screen.Draw(quotes)
+			redrawQuotesFlag = false
 		}
 	}
 }

screen.go

@@ -179,6 +179,8 @@ func (screen *Screen) draw(str string, offset bool) {
 	var allLines []string
 	drewHeading := false
 
+	screen.width, screen.height = termbox.Size()
+
 	tempFormat := "%" + strconv.Itoa(screen.width) + "s"
 	blankLine := fmt.Sprintf(tempFormat, "")
 	allLines = strings.Split(str, "\n")
@@ -189,16 +191,23 @@ func (screen *Screen) draw(str string, offset bool) {
 			// Did we draw the underlined heading row?  This is a crude
 			// check, but--see comments below...
 			// --- Heading row only appears for quotes, so offset is true
-			if strings.Contains(allLines[row], "Ticker") &&
-				strings.Contains(allLines[row], "Last") &&
-				strings.Contains(allLines[row], "Change") {
-				drewHeading = true
-				screen.headerLine = row
-				screen.DrawLine(0, row, allLines[row])
+			if !drewHeading {
+				if strings.Contains(allLines[row], "Ticker") &&
+					strings.Contains(allLines[row], "Last") &&
+					strings.Contains(allLines[row], "Change") {
+					drewHeading = true
+					screen.headerLine = row
+					screen.DrawLine(0, row, allLines[row])
+					// move on to the point to offset to
+					row += screen.offset
+				}
 			} else {
-				if row+screen.offset < len(allLines) &&
+				// only write the necessary lines
+				if row <= len(allLines) &&
 					row > screen.headerLine {
-					screen.DrawLine(0, row, allLines[row+screen.offset])
+					screen.DrawLine(0, row-screen.offset, allLines[row])
+				} else if row > len(allLines) {
+					row = len(allLines)
 				}
 			}
 		} else {