[LyX/master] #12626 disable Ok button of shortcut editor when LFUN is empty

[Stephan Witt]

commit d656e01172a3f1189cc70386132d3d5221121d3d
Author: Stephan Witt <sw...@lyx.org>
Date:   Sun Aug 6 00:28:50 2023 +0200

    #12626 disable Ok button of shortcut editor when LFUN is empty
---
 src/frontends/qt/GuiPrefs.cpp |    8 ++++++++
 src/frontends/qt/GuiPrefs.h   |    5 +++++
 2 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/src/frontends/qt/GuiPrefs.cpp b/src/frontends/qt/GuiPrefs.cpp
index 62ee814..9836086 100644
--- a/src/frontends/qt/GuiPrefs.cpp
+++ b/src/frontends/qt/GuiPrefs.cpp
@@ -2793,6 +2793,14 @@ GuiShortcutDialog::GuiShortcutDialog(QWidget * parent) : 
QDialog(parent)
        Ui::shortcutUi::setupUi(this);
        QDialog::setModal(true);
        lfunLE->setValidator(new NoNewLineValidator(lfunLE));
+       on_lfunLE_textChanged();
+}
+
+
+void GuiShortcutDialog::on_lfunLE_textChanged()
+{
+       QPushButton * ok = buttonBox->button(QDialogButtonBox::Ok);
+       ok->setEnabled(!lfunLE->text().isEmpty());
 }
 
 
diff --git a/src/frontends/qt/GuiPrefs.h b/src/frontends/qt/GuiPrefs.h
index 9c25793..767b6a9 100644
--- a/src/frontends/qt/GuiPrefs.h
+++ b/src/frontends/qt/GuiPrefs.h
@@ -459,8 +459,13 @@ public Q_SLOTS:
 
 class GuiShortcutDialog : public QDialog, public Ui::shortcutUi
 {
+       Q_OBJECT
 public:
        GuiShortcutDialog(QWidget * parent);
+
+public Q_SLOTS:
+       void on_lfunLE_textChanged();
+
 };
 
 
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