* KryptonToast no longer works properly (#3302)

# Fix KryptonToast notification body text visibility (#3018)

## Summary

Fixes a regression where toast notification **body text** could appear
missing (especially on darker themes) after `KryptonToast` lived in
`Krypton.Utilities`. The title and layout were fine; the read-only
**`KryptonRichTextBox`** used for the message did not apply a
label-appropriate foreground colour.

## Issue

- [Bug: KryptonToast no longer works properly —
#3018](#3018)

## Root cause

Toast forms use **`KryptonRichTextBox`** with
**`InputControlStyle.PanelClient`** and **`ReadOnly = true`** to show
static content while matching form chrome. That combination can take the
**input-control** colour path while the control is drawn like **text on
a panel**, so foreground and background colours may coincide (invisible
text).

The same situation was already addressed for **`KryptonMessageBox`** in
[#1692](#1692)
by setting:

`StateCommon.Content.Color1` from
`GlobalStaticValues.KryptonMessageBoxRichTextBoxTextColor` (palette:
`LabelNormalPanel` long text, normal state).

Toast visuals never applied that adjustment after the move to
`Krypton.Utilities`.

## Solution

1. **`Krypton.Utilities` — `GlobalStaticValues`**

- Added internal helper
**`ApplyToastRichTextContentColor(KryptonRichTextBox)`**, which assigns
`StateCommon.Content.Color1` using the same source as the message box
(`KryptonMessageBoxRichTextBoxTextColor`).

2. **All toast visual forms** that host
**`krtbNotificationContentText`**

- At the start of **`UpdateText()`**, call
**`GlobalStaticValues.ApplyToastRichTextContentColor(krtbNotificationContentText)`**
before assigning the notification text.

This covers basic toasts (LTR/RTL, with and without progress bar) and
user-input toasts (all LTR/RTL and progress-bar variants). Only the
read-only rich text used for the **notification content** is affected.

## Out of scope (by design)

Editable toast controls (`KryptonTextBox`, `KryptonComboBox`,
`KryptonNumericUpDown`, etc.) use normal input styling, **not**
`PanelClient` for the rich-text workaround. They should continue to use
the theme’s input colours; the message-box label colour is not
appropriate for those controls.

## How to verify

1. Run **`ToastNotificationQuickTestForm`** or
**`UserInputToastNotificationTest`** (or any code path that calls
`KryptonToast.ShowBasicNotification` / `ShowNotification`).
2. Switch to a **dark** palette (for example Office 2010 Black or
another high-contrast dark theme).
3. Confirm **notification title** and **body** text are both readable.

## Checklist

- [x] Behaviour aligned with `VisualMessageBoxForm` /
`VisualMessageBoxRtlAwareForm` rich text handling
([#1692](#1692)).

<img width="670" height="254" alt="image"
src="https://github.com/user-attachments/assets/5a2cb92f-a395-4b81-8bcd-9d1b528b215b"
/>

Author: PWagner1

Documents/Changelog/Changelog.md

@@ -45,6 +45,7 @@
 
 ## 2026-11-xx - Build 2611 (V110 Nightly) - November 2026
 
+* Resolved [#3018](https://github.com/Krypton-Suite/Standard-Toolkit/issues/3018), `KryptonToast` no longer works properly
 * Resolved [#3227](https://github.com/Krypton-Suite/Standard-Toolkit/issues/3227), `KryptonDockingManager.LoadConfigFromArray` throws exception
 * Resolved [#3225](https://github.com/Krypton-Suite/Standard-Toolkit/issues/3225), Ribbon large button image-to-text separator not DPI-scaled
 * Resolved [#3256](https://github.com/Krypton-Suite/Standard-Toolkit/issues/3256), Tree View Event is Crashing

Source/Krypton Components/Krypton.Utilities/Components/KryptonToast/Controls Visuals/Basic/LTR/VisualToastBasicForm.cs

@@ -1,4 +1,4 @@
-#region BSD License
+#region BSD License
 /*
  *
  *  New BSD 3-Clause License (https://github.com/Krypton-Suite/Standard-Toolkit/blob/master/LICENSE)
@@ -71,6 +71,8 @@ public VisualToastBasicForm(KryptonBasicToastData data)
 
     private void UpdateText()
     {
+        GlobalStaticValues.ApplyToastRichTextContentColor(krtbNotificationContentText);
+
         krtbNotificationContentText.Text = _basicToastNotificationData.NotificationContent ?? string.Empty;
 
         klblHeader.Text = _basicToastNotificationData.NotificationTitle;

Source/Krypton Components/Krypton.Utilities/Components/KryptonToast/Controls Visuals/Basic/LTR/VisualToastBasicWithProgressBarForm.cs

@@ -1,4 +1,4 @@
-#region BSD License
+#region BSD License
 /*
  *
  *  New BSD 3-Clause License (https://github.com/Krypton-Suite/Standard-Toolkit/blob/master/LICENSE)
@@ -90,6 +90,8 @@ public KryptonToastResult NotificationResult
 
     private void UpdateText()
     {
+        GlobalStaticValues.ApplyToastRichTextContentColor(krtbNotificationContentText);
+
         krtbNotificationContentText.Text = _basicToastNotificationData.NotificationContent ?? string.Empty;
 
         klblHeader.Text = _basicToastNotificationData.NotificationTitle;

Source/Krypton Components/Krypton.Utilities/Components/KryptonToast/Controls Visuals/Basic/RTL/VisualToastBasicRtlAwareForm.cs

@@ -1,4 +1,4 @@
-#region BSD License
+#region BSD License
 /*
  *
  *  New BSD 3-Clause License (https://github.com/Krypton-Suite/Standard-Toolkit/blob/master/LICENSE)
@@ -67,6 +67,8 @@ public VisualToastBasicRtlAwareForm(KryptonBasicToastData toastNotificationData)
 
     private void UpdateText()
     {
+        GlobalStaticValues.ApplyToastRichTextContentColor(krtbNotificationContentText);
+
         krtbNotificationContentText.Text = _basicToastNotificationData.NotificationContent ?? string.Empty;
 
         klblHeader.Text = _basicToastNotificationData.NotificationTitle;

Source/Krypton Components/Krypton.Utilities/Components/KryptonToast/Controls Visuals/Basic/RTL/VisualToastBasicWithProgressBarRtlAwareForm.cs

@@ -1,4 +1,4 @@
-#region BSD License
+#region BSD License
 /*
  *
  *  New BSD 3-Clause License (https://github.com/Krypton-Suite/Standard-Toolkit/blob/master/LICENSE)
@@ -67,6 +67,8 @@ public VisualToastBasicWithProgressBarRtlAwareForm(KryptonBasicToastData data)
 
     private void UpdateText()
     {
+        GlobalStaticValues.ApplyToastRichTextContentColor(krtbNotificationContentText);
+
         krtbNotificationContentText.Text = _basicToastNotificationData.NotificationContent ?? string.Empty;
 
         klblHeader.Text = _basicToastNotificationData.NotificationTitle;

Source/Krypton Components/Krypton.Utilities/Components/KryptonToast/Controls Visuals/User Input/LTR/Normal/VisualToastComboBoxUserInputForm.cs

@@ -1,4 +1,4 @@
-#region BSD License
+#region BSD License
 /*
  *
  *  New BSD 3-Clause License (https://github.com/Krypton-Suite/Standard-Toolkit/blob/master/LICENSE)
@@ -55,6 +55,8 @@ private void UpdateBorderColors()
 
     private void UpdateText()
     {
+        GlobalStaticValues.ApplyToastRichTextContentColor(krtbNotificationContentText);
+
         klblHeader.Text = _data.NotificationTitle ?? GlobalStaticValues.DEFAULT_EMPTY_STRING;
 
         krtbNotificationContentText.Text = _data.NotificationContent ?? GlobalStaticValues.DEFAULT_EMPTY_STRING;

Source/Krypton Components/Krypton.Utilities/Components/KryptonToast/Controls Visuals/User Input/LTR/Normal/VisualToastDateTimeUserInputForm.cs

@@ -1,4 +1,4 @@
-#region BSD License
+#region BSD License
 /*
  *
  *  New BSD 3-Clause License (https://github.com/Krypton-Suite/Standard-Toolkit/blob/master/LICENSE)
@@ -54,6 +54,8 @@ private void UpdateBorderColors()
 
     private void UpdateText()
     {
+        GlobalStaticValues.ApplyToastRichTextContentColor(krtbNotificationContentText);
+
         klblHeader.Text = _data.NotificationTitle;
 
         krtbNotificationContentText.Text = _data.NotificationContent;

Source/Krypton Components/Krypton.Utilities/Components/KryptonToast/Controls Visuals/User Input/LTR/Normal/VisualToastDomainUpDownUserInputForm.cs

@@ -1,4 +1,4 @@
-#region BSD License
+#region BSD License
 /*
  *
  *  New BSD 3-Clause License (https://github.com/Krypton-Suite/Standard-Toolkit/blob/master/LICENSE)
@@ -55,6 +55,8 @@ private void UpdateBorderColors()
 
     private void UpdateText()
     {
+        GlobalStaticValues.ApplyToastRichTextContentColor(krtbNotificationContentText);
+
         klblHeader.Text = _data.NotificationTitle;
 
         krtbNotificationContentText.Text = _data.NotificationContent;

Source/Krypton Components/Krypton.Utilities/Components/KryptonToast/Controls Visuals/User Input/LTR/Normal/VisualToastMaskedTextBoxUserInputForm.cs

@@ -1,4 +1,4 @@
-#region BSD License
+#region BSD License
 /*
  *
  *  New BSD 3-Clause License (https://github.com/Krypton-Suite/Standard-Toolkit/blob/master/LICENSE)
@@ -55,6 +55,8 @@ private void UpdateBorderColors()
 
     private void UpdateText()
     {
+        GlobalStaticValues.ApplyToastRichTextContentColor(krtbNotificationContentText);
+
         klblHeader.Text = _data.NotificationTitle;
 
         krtbNotificationContentText.Text = _data.NotificationContent;

Source/Krypton Components/Krypton.Utilities/Components/KryptonToast/Controls Visuals/User Input/LTR/Normal/VisualToastNUDUserInputForm.cs

@@ -1,4 +1,4 @@
-#region BSD License
+#region BSD License
 /*
  *
  *  New BSD 3-Clause License (https://github.com/Krypton-Suite/Standard-Toolkit/blob/master/LICENSE)
@@ -55,6 +55,8 @@ private void UpdateBorderColors()
 
     private void UpdateText()
     {
+        GlobalStaticValues.ApplyToastRichTextContentColor(krtbNotificationContentText);
+
         klblHeader.Text = _data.NotificationTitle;
 
         krtbNotificationContentText.Text = _data.NotificationContent;