Merge pull request #1590 from deprov447/Back/Next_buttons_at_installation

Navigation buttons hideability during installation

settings.conf

@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: CC0-1.0
 #
 # Configuration file for Calamares
-# 
+#
 # This is the top-level configuration file for Calamares.
 # It specifies what modules will be used, as well as some
 # overall characteristics -- is this a setup program, or
@@ -217,6 +217,14 @@ disable-cancel: false
 # YAML: boolean.
 disable-cancel-during-exec: false
 
+# If this is set to true, the "Next" and "Back" button will be hidden once
+# you start the 'Installation'.
+#
+# Default is false, but Calamares will complain if this is not explicitly set.
+#
+# YAML: boolean.
+hide-back-and-next-during-exec: false
+
 # If this is set to true, then once the end of the sequence has
 # been reached, the quit (done) button is clicked automatically
 # and Calamares will close. Default is false: the user will see

src/calamares/CalamaresWindow.cpp

@@ -4,6 +4,7 @@
  *   SPDX-FileCopyrightText: 2017-2018 Adriaan de Groot <groot@kde.org>
  *   SPDX-FileCopyrightText: 2018 Raul Rodrigo Segura (raurodse)
  *   SPDX-FileCopyrightText: 2019 Collabora Ltd <arnaud.ferraris@collabora.com>
+ *   SPDX-FileCopyrightText: 2020 Anubhav Choudhary <ac.10edu@gmail.com>
  *   SPDX-License-Identifier: GPL-3.0-or-later
  *
  *   Calamares is Free Software: see the License-Identifier above.
@@ -161,6 +162,7 @@ CalamaresWindow::getWidgetNavigation( QWidget* parent )
         connect( m_viewManager, &Calamares::ViewManager::backIconChanged, this, [=]( QString n ) {
             setButtonIcon( back, n );
         } );
+        connect( m_viewManager, &Calamares::ViewManager::backAndNextVisibleChanged, back, &QPushButton::setVisible );
         bottomLayout->addWidget( back );
     }
     {
@@ -173,6 +175,7 @@ CalamaresWindow::getWidgetNavigation( QWidget* parent )
         connect( m_viewManager, &Calamares::ViewManager::nextIconChanged, this, [=]( QString n ) {
             setButtonIcon( next, n );
         } );
+        connect( m_viewManager, &Calamares::ViewManager::backAndNextVisibleChanged, next, &QPushButton::setVisible );
         bottomLayout->addWidget( next );
     }
     bottomLayout->addSpacing( 12 );

src/calamares/calamares-navigation.qml

@@ -35,7 +35,7 @@ Rectangle {
             icon.name: ViewManager.backIcon;
 
             enabled: ViewManager.backEnabled;
-            visible: true;
+            visible: ViewManager.backAndNextVisible;
             onClicked: { ViewManager.back(); }
         }
         Button
@@ -44,7 +44,7 @@ Rectangle {
             icon.name: ViewManager.nextIcon;
 
             enabled: ViewManager.nextEnabled;
-            visible: true;
+            visible: ViewManager.backAndNextVisible;
             onClicked: { ViewManager.next(); }
         }
         Button

src/libcalamares/Settings.cpp

@@ -308,6 +308,7 @@ Settings::setConfiguration( const QByteArray& ba, const QString& explainName )
         m_isSetupMode = requireBool( config, "oem-setup", !m_doChroot );
         m_disableCancel = requireBool( config, "disable-cancel", false );
         m_disableCancelDuringExec = requireBool( config, "disable-cancel-during-exec", false );
+        m_hideBackAndNextDuringExec = requireBool( config, "hide-back-and-next-during-exec", false );
         m_quitAtEnd = requireBool( config, "quit-at-end", false );
 
         reconcileInstancesAndSequence();

src/libcalamares/Settings.h

@@ -157,6 +157,8 @@ public:
     /** @brief Temporary setting of disable-cancel: can't cancel during exec. */
     bool disableCancelDuringExec() const { return m_disableCancelDuringExec; }
 
+    bool hideBackAndNextDuringExec() const { return m_hideBackAndNextDuringExec; }
+
     /** @brief Is quit-at-end set? (Quit automatically when done) */
     bool quitAtEnd() const { return m_quitAtEnd; }
 
@@ -170,13 +172,15 @@ private:
 
     QString m_brandingComponentName;
 
+    // bools are initialized here according to default setting
     bool m_debug;
-    bool m_doChroot;
-    bool m_isSetupMode;
-    bool m_promptInstall;
-    bool m_disableCancel;
-    bool m_disableCancelDuringExec;
-    bool m_quitAtEnd;
+    bool m_doChroot = true;
+    bool m_isSetupMode = false;
+    bool m_promptInstall = false;
+    bool m_disableCancel = false;
+    bool m_disableCancelDuringExec = false;
+    bool m_hideBackAndNextDuringExec=false;
+    bool m_quitAtEnd = false;
 };
 
 }  // namespace Calamares

src/libcalamaresui/ViewManager.cpp

@@ -369,6 +369,7 @@ ViewManager::next()
             UPDATE_BUTTON_PROPERTY( backEnabled, false )
         }
         updateCancelEnabled( !settings->disableCancel() && !( executing && settings->disableCancelDuringExec() ) );
+        updateBackAndNextVisibility( !( executing && settings->hideBackAndNextDuringExec() ) );
     }
     else
     {
@@ -528,6 +529,12 @@ ViewManager::updateCancelEnabled( bool enabled )
     emit cancelEnabled( enabled );
 }
 
+void
+ViewManager::updateBackAndNextVisibility( bool visible)
+{
+    UPDATE_BUTTON_PROPERTY( backAndNextVisible, visible )
+}
+
 QVariant
 ViewManager::data( const QModelIndex& index, int role ) const
 {

src/libcalamaresui/ViewManager.h

@@ -45,6 +45,8 @@ class UIDLLEXPORT ViewManager : public QAbstractListModel
 
     Q_PROPERTY( bool quitVisible READ quitVisible NOTIFY quitVisibleChanged FINAL )
 
+    Q_PROPERTY( bool backAndNextVisible READ backAndNextVisible NOTIFY backAndNextVisibleChanged FINAL )
+
     ///@brief Sides on which the ViewManager has side-panels
     Q_PROPERTY( Qt::Orientations panelSides READ panelSides WRITE setPanelSides MEMBER m_panelSides )
 
@@ -144,6 +146,10 @@ public Q_SLOTS:
         return m_backIcon;  ///< Name of the icon to show
     }
 
+    bool backAndNextVisible() const
+    {
+        return m_backAndNextVisible;  ///< Is the quit-button to be enabled
+    }
     /**
      * @brief Probably quit
      *
@@ -203,6 +209,7 @@ signals:
     void backEnabledChanged( bool ) const;
     void backLabelChanged( QString ) const;
     void backIconChanged( QString ) const;
+    void backAndNextVisibleChanged( bool ) const;
 
     void quitEnabledChanged( bool ) const;
     void quitLabelChanged( QString ) const;
@@ -217,6 +224,7 @@ private:
     void insertViewStep( int before, ViewStep* step );
     void updateButtonLabels();
     void updateCancelEnabled( bool enabled );
+    void updateBackAndNextVisibility( bool visible );
 
     inline bool currentStepValid() const { return ( 0 <= m_currentStep ) && ( m_currentStep < m_steps.length() ); }
 
@@ -236,6 +244,8 @@ private:
     QString m_backLabel;
     QString m_backIcon;
 
+    bool m_backAndNextVisible = true;
+
     bool m_quitEnabled = false;
     QString m_quitLabel;
     QString m_quitIcon;