[LyX/master] Fix initial ability of color edit buttons in PrefColors

[Koji Yokota]

commit 3b5deaa5c1794027555dd66d2e9f49d4d53a395c
Author: Koji Yokota <yok...@lyx.org>
Date:   Tue Jun 10 09:58:06 2025 +0900

    Fix initial ability of color edit buttons in PrefColors
---
 src/frontends/qt/GuiPrefs.cpp | 12 ++++++++++++
 src/frontends/qt/GuiPrefs.h   |  2 ++
 2 files changed, 14 insertions(+)

diff --git a/src/frontends/qt/GuiPrefs.cpp b/src/frontends/qt/GuiPrefs.cpp
index 8d558997d0..413e49dca0 100644
--- a/src/frontends/qt/GuiPrefs.cpp
+++ b/src/frontends/qt/GuiPrefs.cpp
@@ -1129,6 +1129,7 @@ void PrefColors::clickedColorsTV(const QModelIndex index)
        if (column < 2)
                changeColor(row, column);
 
+       enableEditButtons();
        setResetButtonStatus(row);
 }
 
@@ -1394,6 +1395,15 @@ void PrefColors::setResetButtonStatus(bool is_undoing)
 }
 
 
+void PrefColors::enableEditButtons()
+{
+       if (!lightColorEditPB->isEnabled())
+               lightColorEditPB->setEnabled(true);
+       if (!darkColorEditPB->isEnabled())
+               darkColorEditPB->setEnabled(true);
+}
+
+
 void PrefColors::exportTheme()
 {
        // ask for directory to export
@@ -1827,6 +1837,8 @@ void PrefColors::initializeColorsTV()
        darkColorResetPB->setDisabled(true);
        bothColorResetPB->setDisabled(true);
        colorResetAllPB->setDisabled(true);
+       lightColorEditPB->setDisabled(true);
+       darkColorEditPB->setDisabled(true);
 
        colorsTV->show();
 }
diff --git a/src/frontends/qt/GuiPrefs.h b/src/frontends/qt/GuiPrefs.h
index 1ad47afdf4..362da3d550 100644
--- a/src/frontends/qt/GuiPrefs.h
+++ b/src/frontends/qt/GuiPrefs.h
@@ -308,6 +308,8 @@ private:
        void setResetButtonStatus(int const &row, bool is_undoing = false);
        /// Set availability of reset buttons of the selected row
        void setResetButtonStatus(bool is_undoing = false);
+       /// Enable edit buttons
+       void enableEditButtons();
        /// Get default color of current theme at (row, column) in the colorsTV.
        /// If theme_colors_ is empty, this returns an invalid QColor.
        QColor getCurrentThemeColor(int const &row, bool const &is_dark_color);
-- 
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