From c2c6e6da2d827065536d4a171a0309165197b6dd Mon Sep 17 00:00:00 2001
From: morrison <edonomorrison@gmail.com>
Date: Wed, 21 Jul 2021 13:16:02 +0100
Subject: [PATCH] add disabled state

---
 ui/decredmaterial/progressbar.go | 25 -------------------------
 ui/decredmaterial/switch.go      | 13 +++++++++++++
 ui/decredmaterial/theme.go       | 25 +++++++++++++++++++++++++
 ui/page/settings_page.go         |  1 -
 4 files changed, 38 insertions(+), 26 deletions(-)

diff --git a/ui/decredmaterial/progressbar.go b/ui/decredmaterial/progressbar.go
index 792e15b4a..d51968311 100644
--- a/ui/decredmaterial/progressbar.go
+++ b/ui/decredmaterial/progressbar.go
@@ -72,28 +72,3 @@ func clamp1(v float32) float32 {
 		return v
 	}
 }
-
-// Disabled blends color towards the luminance and multiplies alpha.
-// Blending towards luminance will desaturate the color.
-// Multiplying alpha blends the color together more with the background.
-func Disabled(c color.NRGBA) (d color.NRGBA) {
-	const r = 80 // blend ratio
-	lum := approxLuminance(c)
-	return color.NRGBA{
-		R: byte((int(c.R)*r + int(lum)*(256-r)) / 256),
-		G: byte((int(c.G)*r + int(lum)*(256-r)) / 256),
-		B: byte((int(c.B)*r + int(lum)*(256-r)) / 256),
-		A: byte(int(c.A) * (128 + 32) / 256),
-	}
-}
-
-// approxLuminance is a fast approximate version of RGBA.Luminance.
-func approxLuminance(c color.NRGBA) byte {
-	const (
-		r = 13933 // 0.2126 * 256 * 256
-		g = 46871 // 0.7152 * 256 * 256
-		b = 4732  // 0.0722 * 256 * 256
-		t = r + g + b
-	)
-	return byte((r*int(c.R) + g*int(c.G) + b*int(c.B)) / t)
-}
diff --git a/ui/decredmaterial/switch.go b/ui/decredmaterial/switch.go
index a6ec0aed6..b700d624a 100644
--- a/ui/decredmaterial/switch.go
+++ b/ui/decredmaterial/switch.go
@@ -20,6 +20,7 @@ type Switch struct {
 	active       color.NRGBA
 	inactive     color.NRGBA
 	thumbColor   color.NRGBA
+	disabled     bool
 	switchWidget *widget.Bool
 }
 
@@ -79,7 +80,12 @@ func (s *Switch) Layout(gtx layout.Context) layout.Dimensions {
 		X: float32(trackWidth),
 		Y: float32(trackHeight),
 	}}
+
 	col := s.inactive
+	if s.disabled {
+		col = Disabled(s.inactive)
+		s.thumbColor = Disabled(s.thumbColor)
+	}
 	if s.IsChecked() {
 		col = s.active
 	}
@@ -139,6 +145,9 @@ func (s *Switch) Changed() bool {
 }
 
 func (s *Switch) IsChecked() bool {
+	if s.disabled {
+		s.SetChecked(false)
+	}
 	return s.switchWidget.Value
 }
 
@@ -154,6 +163,10 @@ func (s *Switch) SetTrackColor(activeColor, inactiveColor color.NRGBA) {
 	s.inactive, s.active = inactiveColor, activeColor
 }
 
+func (s *Switch) Disabled() {
+	s.disabled = true
+}
+
 func (s *SwitchButtonText) Layout(gtx layout.Context) layout.Dimensions {
 	s.handleClickEvent()
 	m8 := unit.Dp(8)
diff --git a/ui/decredmaterial/theme.go b/ui/decredmaterial/theme.go
index f78df7b92..5c36065cf 100644
--- a/ui/decredmaterial/theme.go
+++ b/ui/decredmaterial/theme.go
@@ -281,3 +281,28 @@ func (t *Theme) closeAllDropdownMenus(group uint) {
 		}
 	}
 }
+
+// Disabled blends color towards the luminance and multiplies alpha.
+// Blending towards luminance will desaturate the color.
+// Multiplying alpha blends the color together more with the background.
+func Disabled(c color.NRGBA) (d color.NRGBA) {
+	const r = 80 // blend ratio
+	lum := approxLuminance(c)
+	return color.NRGBA{
+		R: byte((int(c.R)*r + int(lum)*(256-r)) / 256),
+		G: byte((int(c.G)*r + int(lum)*(256-r)) / 256),
+		B: byte((int(c.B)*r + int(lum)*(256-r)) / 256),
+		A: byte(int(c.A) * (128 + 32) / 256),
+	}
+}
+
+// approxLuminance is a fast approximate version of RGBA.Luminance.
+func approxLuminance(c color.NRGBA) byte {
+	const (
+		r = 13933 // 0.2126 * 256 * 256
+		g = 46871 // 0.7152 * 256 * 256
+		b = 4732  // 0.0722 * 256 * 256
+		t = r + g + b
+	)
+	return byte((r*int(c.R) + g*int(c.G) + b*int(c.B)) / t)
+}
diff --git a/ui/page/settings_page.go b/ui/page/settings_page.go
index b0344712b..ce90d05e3 100644
--- a/ui/page/settings_page.go
+++ b/ui/page/settings_page.go
@@ -122,7 +122,6 @@ func NewSettingsPage(l *load.Load) *SettingsPage {
 	pg.agentLabel.Color = pg.Theme.Color.Gray
 
 	pg.chevronRightIcon.Color = color
-
 	return pg
 }