Support CSS text-decoration-color in underlines, overlines, strikethrough

Also add a feature to the textedit example to set this value.

[ChangeLog][QtGui][CSS] The CSS text-decoration-color attribute is now
supported in rich text spans with underlines, overlines and strikethrough.

Fixes: QTBUG-82114
Task-number: QTBUG-39617
Change-Id: I0065cb5431833da55b0f503ce7ff2b83b74b718a
Reviewed-by: Allan Sandfeld Jensen <[email protected]>

1 files changed, 15 insertions, 0 deletions

diff --git a/examples/widgets/richtext/textedit/textedit.cpp b/examples/widgets/richtext/textedit/textedit.cpp
index 3a1b3321a12..ed91f6e2503 100644
--- a/examples/widgets/richtext/textedit/textedit.cpp
+++ b/examples/widgets/richtext/textedit/textedit.cpp
@@ -354,6 +354,10 @@ void TextEdit::setupTextActions()
     actionTextColor = menu->addAction(pix, tr("&Color..."), this, &TextEdit::textColor);
     tb->addAction(actionTextColor);
 
+    const QIcon underlineColorIcon(rsrcPath + "/textundercolor.png");
+    actionUnderlineColor = menu->addAction(underlineColorIcon, tr("Underline color..."), this, &TextEdit::underlineColor);
+    tb->addAction(actionUnderlineColor);
+
     menu->addSeparator();
 
     const QIcon checkboxIcon = QIcon::fromTheme("status-checkbox-checked", QIcon(rsrcPath + "/checkbox-checked.png"));
@@ -729,6 +733,17 @@ void TextEdit::textColor()
     colorChanged(col);
 }
 
+void TextEdit::underlineColor()
+{
+    QColor col = QColorDialog::getColor(Qt::black, this);
+    if (!col.isValid())
+        return;
+    QTextCharFormat fmt;
+    fmt.setUnderlineColor(col);
+    mergeFormatOnWordOrSelection(fmt);
+    colorChanged(col);
+}
+
 void TextEdit::textAlign(QAction *a)
 {
     if (a == actionAlignLeft)