Qt: don't allow empty file on convert dialog (fix #11072)

modules/gui/qt4/dialogs/convert.cpp

@@ -105,7 +105,7 @@ ConvertDialog::ConvertDialog( QWidget *parent, intf_thread_t *_p_intf,
     mainLayout->addWidget( settingBox, 1, 0, 1, -1  );
 
     /* Buttons */
-    QPushButton *okButton = new QPushButton( qtr( "&Start" ) );
+    okButton = new QPushButton( qtr( "&Start" ) );
     QPushButton *cancelButton = new QPushButton( qtr( "&Cancel" ) );
     QDialogButtonBox *buttonBox = new QDialogButtonBox;
 
@@ -121,6 +121,9 @@ ConvertDialog::ConvertDialog( QWidget *parent, intf_thread_t *_p_intf,
     CONNECT( convertRadio, toggled(bool), convertPanel, setEnabled(bool) );
     CONNECT(profile, optionsChanged(), this, setDestinationFileExtension());
     CONNECT(fileLine, editingFinished(), this, setDestinationFileExtension());
+    CONNECT(fileLine, textChanged(const QString&), this, validate());
+
+    validate();
 }
 
 void ConvertDialog::fileBrowse()
@@ -182,3 +185,8 @@ void ConvertDialog::setDestinationFileExtension()
         }
     }
 }
+
+void ConvertDialog::validate()
+{
+    okButton->setEnabled( !fileLine->text().isEmpty() );
+}

modules/gui/qt4/dialogs/convert.hpp

@@ -29,6 +29,7 @@
 class QLineEdit;
 class QCheckBox;
 class QRadioButton;
+class QPushButton;
 class VLCProfileSelector;
 
 class ConvertDialog : public QVLCDialog
@@ -45,6 +46,7 @@ private:
 
     QCheckBox *displayBox, *deinterBox;
     QRadioButton *dumpRadio;
+    QPushButton *okButton;
     VLCProfileSelector *profile;
     QString mrl;
 private slots:
@@ -52,6 +54,7 @@ private slots:
     virtual void cancel();
     void fileBrowse();
     void setDestinationFileExtension();
+    void validate();
 };
 
 #endif