From 8a27bd5bc3a680d144e23c1f4a3f4a08ac3957ae Mon Sep 17 00:00:00 2001
From: Jakub Trllo <43494761+iLLiCiTiT@users.noreply.github.com>
Date: Wed, 12 Feb 2025 10:34:36 +0100
Subject: [PATCH] implemented 'PlaceholderPlainTextEdit'

---
 client/ayon_core/tools/utils/__init__.py |  2 ++
 client/ayon_core/tools/utils/widgets.py  | 41 +++++++++++++++++++-----
 2 files changed, 35 insertions(+), 8 deletions(-)

diff --git a/client/ayon_core/tools/utils/__init__.py b/client/ayon_core/tools/utils/__init__.py
index 4714e76ea3..9206af9beb 100644
--- a/client/ayon_core/tools/utils/__init__.py
+++ b/client/ayon_core/tools/utils/__init__.py
@@ -5,6 +5,7 @@ from .widgets import (
     ComboBox,
     CustomTextComboBox,
     PlaceholderLineEdit,
+    PlaceholderPlainTextEdit,
     ElideLabel,
     HintedLineEdit,
     ExpandingTextEdit,
@@ -89,6 +90,7 @@ __all__ = (
     "ComboBox",
     "CustomTextComboBox",
     "PlaceholderLineEdit",
+    "PlaceholderPlainTextEdit",
     "ElideLabel",
     "HintedLineEdit",
     "ExpandingTextEdit",
diff --git a/client/ayon_core/tools/utils/widgets.py b/client/ayon_core/tools/utils/widgets.py
index 059a06648b..1074b6d4fb 100644
--- a/client/ayon_core/tools/utils/widgets.py
+++ b/client/ayon_core/tools/utils/widgets.py
@@ -88,23 +88,48 @@ class CustomTextComboBox(ComboBox):
         painter.drawControl(QtWidgets.QStyle.CE_ComboBoxLabel, option)
 
 
-class PlaceholderLineEdit(QtWidgets.QLineEdit):
-    """Set placeholder color of QLineEdit in Qt 5.12 and higher."""
-    def __init__(self, *args, **kwargs):
-        super(PlaceholderLineEdit, self).__init__(*args, **kwargs)
-        # Change placeholder palette color
-        if hasattr(QtGui.QPalette, "PlaceholderText"):
-            filter_palette = self.palette()
+class _Cache:
+    _placeholder_color = None
+
+    @classmethod
+    def get_placeholder_color(cls):
+        if cls._placeholder_color is None:
             color_obj = get_objected_colors("font")
             color = color_obj.get_qcolor()
             color.setAlpha(67)
+            cls._placeholder_color = color
+        return cls._placeholder_color
+
+
+class PlaceholderLineEdit(QtWidgets.QLineEdit):
+    """Set placeholder color of QLineEdit in Qt 5.12 and higher."""
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        # Change placeholder palette color
+        if hasattr(QtGui.QPalette, "PlaceholderText"):
+            filter_palette = self.palette()
             filter_palette.setColor(
                 QtGui.QPalette.PlaceholderText,
-                color
+                _Cache.get_placeholder_color()
             )
             self.setPalette(filter_palette)
 
 
+class PlaceholderPlainTextEdit(QtWidgets.QPlainTextEdit):
+    """Set placeholder color of QPlainTextEdit in Qt 5.12 and higher."""
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        # Change placeholder palette color
+        if hasattr(QtGui.QPalette, "PlaceholderText"):
+            viewport = self.viewport()
+            filter_palette = viewport.palette()
+            filter_palette.setColor(
+                QtGui.QPalette.PlaceholderText,
+                _Cache.get_placeholder_color()
+            )
+            viewport.setPalette(filter_palette)
+
+
 class ElideLabel(QtWidgets.QLabel):
     """Label which elide text.