18/12/2025 Update.

* Bug fix.

Author: Augus1999

pypdfeditor_core/application.py

@@ -288,10 +288,10 @@ def save3(self) -> None:
         """
         u_password = self.tab3.line1.text()
         o_password = self.tab3.line2.text()
-        rotation = int(self.tab3.line5.text())
-        font_size = int(self.tab3.line3.text())
+        rotation = self.tab3.line5.text()
+        font_size = self.tab3.line3.text()
         watermark = self.tab3.text.toPlainText()
-        opacity = int(self.tab3.line4.text()) / 100
+        opacity = self.tab3.line4.text()
         if len(self.tab3.book_list) != 0:
             file_name, ok = save(self, ".pdf")
             if ok:
@@ -542,10 +542,10 @@ def preview(self) -> None:
         """
         preview watermark effects
         """
-        rotation = int(self.tab3.line5.text())
-        font_size = int(self.tab3.line3.text())
+        rotation = self.tab3.line5.text()
+        font_size = self.tab3.line3.text()
         watermark = self.tab3.text.toPlainText()
-        opacity = int(self.tab3.line4.text()) / 100
+        opacity = self.tab3.line4.text()
         if len(self.tab3.book_list) != 0:
             doc = fitz.Document()
             doc.insert_pdf(self.tab3.book_list[0], from_page=0, to_page=0)
@@ -563,6 +563,12 @@ def preview(self) -> None:
             set_icon(widget=self.tab3, doc=doc)
             doc.close()
             del doc
+        if not self.tab3.line5.text().strip():
+            self.tab3.line5.setText(" 0")
+        if not self.tab3.line3.text().strip():
+            self.tab3.line3.setText("90")
+        if not self.tab3.line4.text().strip():
+            self.tab3.line4.setText("50")
 
     @staticmethod
     def show_index(par: List[int], widget: QWidget):

pypdfeditor_core/functions.py

@@ -149,11 +149,11 @@ def pdf_split(doc: Doc) -> List[int]:
 def add_watermark(
     doc: Union[Doc, Document],
     text: str,
-    rotate: int,
-    colour: Tuple,
-    font_size: int,
+    rotate: Union[int, str],
+    colour: Tuple[float, float, float],
+    font_size: Union[int, str],
     font_file: str,
-    opacity: float = 0.5,
+    opacity: Union[float, int, str] = 0.5,
     position: Tuple[int, int] = (0, 0),
 ) -> Union[Doc, Document]:
     """
@@ -169,6 +169,19 @@ def add_watermark(
     :param position: position of the watermark
     :return: fitz.Document or Doc
     """
+    try:
+        rotate = int(rotate)
+    except ValueError:
+        rotate = 0
+    try:
+        font_size = int(font_size)
+    except ValueError:
+        font_size = 90
+    if not isinstance(opacity, float):
+        try:
+            opacity = int(opacity) / 100
+        except ValueError:
+            opacity = 0.5
     x, y = position
     x, y = int(x), int(y)
     for page in doc:

pypdfeditor_core/windows.py

@@ -857,9 +857,9 @@ def tab3_init(self) -> None:
         self.tab3.check = SwitchBtn(self.tab3)
         self.tab3.check1 = SwitchBtn(self.tab3)
         self.tab3.check2 = SwitchBtn(self.tab3)
-        self.tab3.check.setFixedSize(70, 26)
-        self.tab3.check1.setFixedSize(70, 26)
-        self.tab3.check2.setFixedSize(70, 26)
+        self.tab3.check.setFixedSize(72, 26)
+        self.tab3.check1.setFixedSize(72, 26)
+        self.tab3.check2.setFixedSize(72, 26)
         self.tab3.check.setChecked(True)
         self.tab3.check1.setChecked(False)
         self.tab3.check2.setChecked(False)