Improve Button cursor positioning

button.go

@@ -4,7 +4,6 @@ import (
 	"sync"
 
 	"github.com/gdamore/tcell/v2"
-	"github.com/mattn/go-runewidth"
 )
 
 // Button is labeled box that triggers an action when selected.
@@ -154,12 +153,19 @@ func (b *Button) Draw(screen tcell.Screen) {
 		labelColor := b.labelColor
 		if b.focus.HasFocus() {
 			labelColor = b.labelColorFocused
-			// Draw cursor.
-			if b.cursorRune != 0 {
-				Print(screen, []byte(string(b.cursorRune)), x+width-(width-runewidth.StringWidth(string(b.label)))/2+1, y, width, AlignLeft, labelColor)
+		}
+		_, pw := Print(screen, b.label, x, y, width, AlignCenter, labelColor)
+
+		// Draw cursor.
+		if b.focus.HasFocus() && b.cursorRune != 0 {
+			cursorX := x + int(float64(width)/2+float64(pw)/2)
+			if cursorX > x+width-1 {
+				cursorX = x + width - 1
+			} else if cursorX < x+width {
+				cursorX++
 			}
+			Print(screen, []byte(string(b.cursorRune)), cursorX, y, width, AlignLeft, labelColor)
 		}
-		Print(screen, b.label, x, y, width, AlignCenter, labelColor)
 	}
 }
 

demos/presentation/main.go

@@ -25,12 +25,12 @@ import (
 )
 
 const (
-	appInfo      = "Next slide: Ctrl-N  Previous: Ctrl-P  Exit: Ctrl-C  (Navigate with your keyboard or mouse)"
+	appInfo      = "Next slide: Ctrl-N  Previous: Ctrl-P  Exit: Ctrl-C  (Navigate with your keyboard and mouse)"
 	listInfo     = "Next item: J, Down  Previous item: K, Up  Open context menu: Alt+Enter"
 	textViewInfo = "Scroll down: J, Down, PageDown  Scroll up: K, Up, PageUp"
 	sliderInfo   = "Decrease: H, J, Left, Down  Increase: K, L, Right, Up"
 	formInfo     = "Next field: Tab  Previous field: Shift+Tab  Select: Enter"
-	windowInfo   = "Windows may be dragged an resized using the mouse."
+	windowInfo   = "Windows may be dragged and resized using the mouse."
 )
 
 // Slide is a function which returns the slide's title, any applicable

inputfield.go

@@ -144,8 +144,8 @@ func NewInputField() *InputField {
 	return &InputField{
 		Box:                                     NewBox(),
 		labelColor:                              Styles.SecondaryTextColor,
-		fieldBackgroundColor:                    Styles.ContrastBackgroundColor,
-		fieldBackgroundColorFocused:             Styles.MoreContrastBackgroundColor,
+		fieldBackgroundColor:                    Styles.MoreContrastBackgroundColor,
+		fieldBackgroundColorFocused:             Styles.ContrastBackgroundColor,
 		fieldTextColor:                          Styles.PrimaryTextColor,
 		fieldTextColorFocused:                   Styles.PrimaryTextColor,
 		placeholderTextColor:                    Styles.ContrastSecondaryTextColor,

slider.go

@@ -64,8 +64,8 @@ func NewSlider() *Slider {
 		ProgressBar:                 NewProgressBar(),
 		increment:                   10,
 		labelColor:                  Styles.SecondaryTextColor,
-		fieldBackgroundColor:        Styles.ContrastBackgroundColor,
-		fieldBackgroundColorFocused: Styles.MoreContrastBackgroundColor,
+		fieldBackgroundColor:        Styles.MoreContrastBackgroundColor,
+		fieldBackgroundColorFocused: Styles.ContrastBackgroundColor,
 		fieldTextColor:              Styles.PrimaryTextColor,
 		labelColorFocused:           ColorUnset,
 		fieldTextColorFocused:       ColorUnset,