LibGUI: Add ability to disable multiselect for views

Libraries/LibGUI/AbstractView.cpp

@@ -375,4 +375,16 @@ void AbstractView::drop_event(DropEvent& event)
         on_drop(index, event);
 }
 
+void AbstractView::set_multi_select(bool multi_select)
+{
+    if (m_multi_select == multi_select)
+        return;
+    m_multi_select = multi_select;
+    if (!multi_select && m_selection.size() > 1) {
+        auto first_selected = m_selection.first();
+        m_selection.clear();
+        m_selection.set(first_selected);
+    }
+}
+
 }

Libraries/LibGUI/AbstractView.h

@@ -47,6 +47,9 @@ public:
     bool is_editable() const { return m_editable; }
     void set_editable(bool editable) { m_editable = editable; }
 
+    bool is_multi_select() const { return m_multi_select; }
+    void set_multi_select(bool);
+
     virtual bool accepts_focus() const override { return true; }
     virtual void did_update_model(unsigned flags);
     virtual void did_update_selection();
@@ -110,6 +113,7 @@ private:
     OwnPtr<ModelEditingDelegate> m_editing_delegate;
     ModelSelection m_selection;
     bool m_activates_on_selection { false };
+    bool m_multi_select { true };
 };
 
 }

Libraries/LibGUI/IconView.cpp

@@ -221,9 +221,11 @@ void IconView::mousedown_event(MouseEvent& event)
     auto adjusted_position = to_content_position(event.position());
 
     m_might_drag = false;
-    m_rubber_banding = true;
+    if (is_multi_select()) {
-    m_rubber_band_origin = adjusted_position;
+        m_rubber_banding = true;
-    m_rubber_band_current = adjusted_position;
+        m_rubber_band_origin = adjusted_position;
+        m_rubber_band_current = adjusted_position;
+    }
 }
 
 void IconView::mouseup_event(MouseEvent& event)

Libraries/LibGUI/MultiView.cpp

@@ -108,6 +108,7 @@ MultiView::MultiView()
 
     build_actions();
     set_view_mode(ViewMode::Icon);
+    apply_multi_select();
 }
 
 MultiView::~MultiView()
@@ -194,4 +195,21 @@ void MultiView::build_actions()
 #endif
 }
 
+void MultiView::apply_multi_select()
+{
+    m_table_view->set_multi_select(m_multi_select);
+    m_icon_view->set_multi_select(m_multi_select);
+#ifdef MULTIVIEW_WITH_COLUMNSVIEW
+    //m_columns_view->set_multi_select(m_multi_select);
+#endif
+}
+
+void MultiView::set_multi_select(bool multi_select)
+{
+    if (m_multi_select == multi_select)
+        return;
+    m_multi_select = multi_select;
+    apply_multi_select();
+}
+
 }

Libraries/LibGUI/MultiView.h

@@ -103,10 +103,14 @@ public:
     Action& view_as_columns_action() { return *m_view_as_columns_action; }
 #endif
 
+    bool is_multi_select() const { return m_multi_select; }
+    void set_multi_select(bool);
+
 private:
     MultiView();
 
     void build_actions();
+    void apply_multi_select();
 
     ViewMode m_view_mode { Invalid };
     int m_model_column { 0 };
@@ -126,6 +130,8 @@ private:
 #endif
 
     OwnPtr<ActionGroup> m_view_type_action_group;
+
+    bool m_multi_select { true };
 };
 
 }