TextBox cleanup + backspace repeat

- Switched textbox to helpers,
- Added code to implement a repeat delay on backspace, default 300ms to start repeating, 60ms between repeats

raygui/textbox.go

@@ -3,22 +3,30 @@ package raygui
 import (
 	"fmt"
 	"github.com/gen2brain/raylib-go/raylib"
+	"time"
 )
 
+var backspaceHeld = false
+var nextBackspace = time.Now()
+
+// BackspaceRepeatDelay controls the time backspace must be held down before it will repeat.
+var BackspaceRepeatDelay = 300 * time.Millisecond
+// BackspaceRepeatInterval controls how frequently backspace registers after the initial delay.
+var BackspaceRepeatInterval = 60 * time.Millisecond
+
 // TextBox - Text Box element, updates input text
 func TextBox(bounds rl.Rectangle, text string) string {
 	b := bounds.ToInt32()
-	state := Normal
 
-	mousePoint := rl.GetMousePosition()
 	letter := int32(-1)
 
 	// Update control
-	if rl.CheckCollisionPointRec(mousePoint, bounds) {
+	state := GetInteractionState(bounds)
-		state = Focused // NOTE: PRESSED state is not used on this control
+	borderColor := TextboxBorderColor
+	if state == Pressed || state == Focused {
+		borderColor = ToggleActiveBorderColor
 
 		framesCounter2++
-
 		letter = rl.GetKeyPressed()
 		if letter != -1 {
 			if letter >= 32 && letter < 127 {
@@ -26,33 +34,28 @@ func TextBox(bounds rl.Rectangle, text string) string {
 			}
 		}
 
-		if rl.IsKeyPressed(rl.KeyBackspace) {
+		backspacing := rl.IsKeyPressed(rl.KeyBackspace)
-			if len(text) > 0 {
+		if backspacing {
-				text = text[:len(text)-1]
+			nextBackspace = time.Now().Add(BackspaceRepeatDelay)
+		} else if rl.IsKeyDown(rl.KeyBackspace) {
+			backspacing = time.Since(nextBackspace) >= 0
+			if backspacing {
+				nextBackspace = time.Now().Add(BackspaceRepeatInterval)
 			}
 		}
+		if backspacing && len(text) > 0 {
+			text = text[:len(text)-1]
+		}
 	}
 
-	// Draw control
+	DrawBorderedRectangle(b, GetStyle32(TextboxBorderWidth), GetStyleColor(borderColor), GetStyleColor(TextboxInsideColor))
-	switch state {
+	rl.DrawText(text, b.X+2, b.Y+int32(style[TextboxBorderWidth])+b.Height/2-int32(style[TextboxTextFontsize])/2, int32(style[TextboxTextFontsize]), GetStyleColor(TextboxTextColor))
-	case Normal:
-		rl.DrawRectangle(b.X, b.Y, b.Width, b.Height, rl.GetColor(int32(style[TextboxBorderColor])))
-		rl.DrawRectangle(b.X+int32(style[TextboxBorderWidth]), b.Y+int32(style[TextboxBorderWidth]), b.Width-(int32(style[TextboxBorderWidth])*2), b.Height-(int32(style[TextboxBorderWidth])*2), rl.GetColor(int32(style[TextboxInsideColor])))
-		rl.DrawText(text, b.X+2, b.Y+int32(style[TextboxBorderWidth])+b.Height/2-int32(style[TextboxTextFontsize])/2, int32(style[TextboxTextFontsize]), rl.GetColor(int32(style[TextboxTextColor])))
-		break
-	case Focused:
-		rl.DrawRectangle(b.X, b.Y, b.Width, b.Height, rl.GetColor(int32(style[ToggleActiveBorderColor])))
-		rl.DrawRectangle(b.X+int32(style[TextboxBorderWidth]), b.Y+int32(style[TextboxBorderWidth]), b.Width-(int32(style[TextboxBorderWidth])*2), b.Height-(int32(style[TextboxBorderWidth])*2), rl.GetColor(int32(style[TextboxInsideColor])))
-		rl.DrawText(text, b.X+2, b.Y+int32(style[TextboxBorderWidth])+b.Height/2-int32(style[TextboxTextFontsize])/2, int32(style[TextboxTextFontsize]), rl.GetColor(int32(style[TextboxTextColor])))
 
-		if (framesCounter2/20)%2 == 0 && rl.CheckCollisionPointRec(mousePoint, bounds) {
+	if state == Focused || state == Pressed {
+		// Draw a cursor, when focused.
+		if (framesCounter2/20)%2 == 0 {
 			rl.DrawRectangle(b.X+4+rl.MeasureText(text, int32(style[GlobalTextFontsize])), b.Y+2, 1, b.Height-4, rl.GetColor(int32(style[TextboxLineColor])))
 		}
-		break
-	case Pressed:
-		break
-	default:
-		break
 	}
 
 	return text