Run clang-tidy’s modernize-use-bool-literals pass.

This makes it clearer whether an integer or a boolean has to be passed
in this specific call.

17 files changed, 73 insertions, 73 deletions

diff --git a/src/ui/contextmenu.cpp b/src/ui/contextmenu.cpp
index f66a71cd8..7a6c4e7cf 100644
--- a/src/ui/contextmenu.cpp
+++ b/src/ui/contextmenu.cpp
@@ -94,7 +94,7 @@ ContextMenu::ContextMenu(SPDesktop *desktop, SPItem *item) :
     }
     Gtk::MenuItem* mi;
 
-    mi = Gtk::manage(new Gtk::MenuItem(_("Hide selected objects"),1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Hide selected objects"),true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::HideSelected));
     if (_desktop->selection->isEmpty()) {
         mi->set_sensitive(false);
@@ -102,7 +102,7 @@ ContextMenu::ContextMenu(SPDesktop *desktop, SPItem *item) :
     mi->show();
     append(*mi);//insert(*mi,positionOfLastDialog++);
 
-    mi = Gtk::manage(new Gtk::MenuItem(_("Unhide objects below"),1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Unhide objects below"),true));
     mi->signal_activate().connect(sigc::bind<std::vector< SPItem * > >(sigc::mem_fun(*this, &ContextMenu::UnHideBelow), down_items));
     if (!has_down_hidden) {
         mi->set_sensitive(false);
@@ -110,7 +110,7 @@ ContextMenu::ContextMenu(SPDesktop *desktop, SPItem *item) :
     mi->show();
     append(*mi);//insert(*mi,positionOfLastDialog++);
 
-    mi = Gtk::manage(new Gtk::MenuItem(_("Lock selected objects"),1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Lock selected objects"),true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::LockSelected));
     if (_desktop->selection->isEmpty()) {
         mi->set_sensitive(false);
@@ -118,7 +118,7 @@ ContextMenu::ContextMenu(SPDesktop *desktop, SPItem *item) :
     mi->show();
     append(*mi);//insert(*mi,positionOfLastDialog++);
 
-    mi = Gtk::manage(new Gtk::MenuItem(_("Unlock objects below"),1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Unlock objects below"),true));
     mi->signal_activate().connect(sigc::bind<std::vector< SPItem * > >(sigc::mem_fun(*this, &ContextMenu::UnLockBelow), down_items));
     if (!has_down_locked) {
         mi->set_sensitive(false);
@@ -156,7 +156,7 @@ ContextMenu::ContextMenu(SPDesktop *desktop, SPItem *item) :
             append(MIParent);
 
             /* Pop selection out of group */
-            Gtk::MenuItem* miu = Gtk::manage(new Gtk::MenuItem(_("_Pop selection out of group"), 1));
+            Gtk::MenuItem* miu = Gtk::manage(new Gtk::MenuItem(_("_Pop selection out of group"), true));
             miu->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::ActivateUngroupPopSelection));
             miu->show();
             append(*miu);
@@ -320,7 +320,7 @@ void ContextMenu::MakeItemMenu (void)
     Gtk::MenuItem* mi;
 
     /* Item dialog */
-    mi = Gtk::manage(new Gtk::MenuItem(_("_Object Properties..."),1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("_Object Properties..."),true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::ItemProperties));
     mi->show();
     append(*mi);//insert(*mi,positionOfLastDialog++);
@@ -329,7 +329,7 @@ void ContextMenu::MakeItemMenu (void)
     
     /* Select item */
     if (Inkscape::Verb::getbyid( "org.inkscape.followlink" )) {
-        mi = Gtk::manage(new Gtk::MenuItem(_("_Select This"), 1));
+        mi = Gtk::manage(new Gtk::MenuItem(_("_Select This"), true));
         if (_desktop->selection->includes(_item)) {
             mi->set_sensitive(FALSE);
         } else {
@@ -350,42 +350,42 @@ void ContextMenu::MakeItemMenu (void)
     append(*mi);
 
     /* Select same fill and stroke */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Fill and Stroke"), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Fill and Stroke"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::SelectSameFillStroke));
     mi->set_sensitive(!SP_IS_ANCHOR(_item));
     mi->show();
     select_same_submenu->append(*mi);
 
     /* Select same fill color */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Fill Color"), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Fill Color"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::SelectSameFillColor));
     mi->set_sensitive(!SP_IS_ANCHOR(_item));
     mi->show();
     select_same_submenu->append(*mi);
 
     /* Select same stroke color */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Stroke Color"), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Stroke Color"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::SelectSameStrokeColor));
     mi->set_sensitive(!SP_IS_ANCHOR(_item));
     mi->show();
     select_same_submenu->append(*mi);
 
     /* Select same stroke style */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Stroke Style"), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Stroke Style"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::SelectSameStrokeStyle));
     mi->set_sensitive(!SP_IS_ANCHOR(_item));
     mi->show();
     select_same_submenu->append(*mi);
 
     /* Select same stroke style */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Object type"), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Object type"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::SelectSameObjectType));
     mi->set_sensitive(!SP_IS_ANCHOR(_item));
     mi->show();
     select_same_submenu->append(*mi);
 
     /* Move to layer */
-    mi = Gtk::manage(new Gtk::MenuItem(_("_Move to layer ..."), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("_Move to layer ..."), true));
     if (_desktop->selection->isEmpty()) {
         mi->set_sensitive(FALSE);
     } else {
@@ -395,7 +395,7 @@ void ContextMenu::MakeItemMenu (void)
     append(*mi);
 
     /* Create link */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Create _Link"), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Create _Link"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::ItemCreateLink));
     mi->set_sensitive(!SP_IS_ANCHOR(_item));
     mi->show();
@@ -418,7 +418,7 @@ void ContextMenu::MakeItemMenu (void)
         }
     }    
     /* Set mask */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Set Mask"), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Set Mask"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::SetMask));
     if (ClipRefOK || MaskRefOK) {
         mi->set_sensitive(FALSE);
@@ -429,7 +429,7 @@ void ContextMenu::MakeItemMenu (void)
     append(*mi);
     
     /* Release mask */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Release Mask"), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Release Mask"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::ReleaseMask));
     if (MaskRefOK) {
         mi->set_sensitive(TRUE);
@@ -440,14 +440,14 @@ void ContextMenu::MakeItemMenu (void)
     append(*mi);
 
     /*SSet Clip Group */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Create Clip G_roup"),1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Create Clip G_roup"),true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::CreateGroupClip));
     mi->set_sensitive(TRUE);
     mi->show();
     append(*mi);
     
     /* Set Clip */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Set Cl_ip"), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Set Cl_ip"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::SetClip));
     if (ClipRefOK || MaskRefOK) {
         mi->set_sensitive(FALSE);
@@ -458,7 +458,7 @@ void ContextMenu::MakeItemMenu (void)
     append(*mi);
     
     /* Release Clip */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Release C_lip"), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Release C_lip"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::ReleaseClip));
     if (ClipRefOK) {
         mi->set_sensitive(TRUE);
@@ -469,7 +469,7 @@ void ContextMenu::MakeItemMenu (void)
     append(*mi);
 
     /* Group */
-    mi = Gtk::manage(new Gtk::MenuItem(_("_Group"), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("_Group"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::ActivateGroup));
     if (_desktop->selection->isEmpty()) {
         mi->set_sensitive(FALSE);
@@ -575,7 +575,7 @@ void ContextMenu::ReleaseClip(void)
 void ContextMenu::MakeGroupMenu(void)
 {
     /* Ungroup */
-    Gtk::MenuItem* mi = Gtk::manage(new Gtk::MenuItem(_("_Ungroup"), 1));
+    Gtk::MenuItem* mi = Gtk::manage(new Gtk::MenuItem(_("_Ungroup"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::ActivateUngroup));
     mi->show();
     append(*mi);
@@ -605,19 +605,19 @@ void ContextMenu::MakeAnchorMenu(void)
     Gtk::MenuItem* mi;
     
     /* Link dialog */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Link _Properties..."), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Link _Properties..."), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::AnchorLinkProperties));
     mi->show();
     insert(*mi,positionOfLastDialog++);
     
     /* Select item */
-    mi = Gtk::manage(new Gtk::MenuItem(_("_Follow Link"), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("_Follow Link"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::AnchorLinkFollow));
     mi->show();
     append(*mi);
     
     /* Reset transformations */
-    mi = Gtk::manage(new Gtk::MenuItem(_("_Remove Link"), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("_Remove Link"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::AnchorLinkRemove));
     mi->show();
     append(*mi);
@@ -658,13 +658,13 @@ void ContextMenu::MakeImageMenu (void)
     const gchar *href = ir->attribute("xlink:href");
 
     /* Image properties */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Image _Properties..."), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Image _Properties..."), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::ImageProperties));
     mi->show();
     insert(*mi,positionOfLastDialog++);
 
     /* Edit externally */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Edit Externally..."), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Edit Externally..."), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::ImageEdit));
     mi->show();
     insert(*mi,positionOfLastDialog++);
@@ -673,7 +673,7 @@ void ContextMenu::MakeImageMenu (void)
     }
 
     /* Trace Bitmap */
-    mi = Gtk::manage(new Gtk::MenuItem(_("_Trace Bitmap..."), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("_Trace Bitmap..."), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::ImageTraceBitmap));
     mi->show();
     insert(*mi,positionOfLastDialog++);
@@ -682,7 +682,7 @@ void ContextMenu::MakeImageMenu (void)
     }
 
     /* Trace Pixel Art */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Trace Pixel Art"), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Trace Pixel Art"), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::ImageTracePixelArt));
     mi->show();
     insert(*mi,positionOfLastDialog++);
@@ -864,7 +864,7 @@ void ContextMenu::MakeShapeMenu (void)
     Gtk::MenuItem* mi;
     
     /* Item dialog */
-    mi = Gtk::manage(new Gtk::MenuItem(_("_Fill and Stroke..."), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("_Fill and Stroke..."), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::FillSettings));
     mi->show();
     insert(*mi,positionOfLastDialog++);
@@ -884,19 +884,19 @@ void ContextMenu::MakeTextMenu (void)
     Gtk::MenuItem* mi;
 
     /* Fill and Stroke dialog */
-    mi = Gtk::manage(new Gtk::MenuItem(_("_Fill and Stroke..."), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("_Fill and Stroke..."), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::FillSettings));
     mi->show();
     insert(*mi,positionOfLastDialog++);
     
     /* Edit Text dialog */
-    mi = Gtk::manage(new Gtk::MenuItem(_("_Text and Font..."), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("_Text and Font..."), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::TextSettings));
     mi->show();
     insert(*mi,positionOfLastDialog++);
 
     /* Spellcheck dialog */
-    mi = Gtk::manage(new Gtk::MenuItem(_("Check Spellin_g..."), 1));
+    mi = Gtk::manage(new Gtk::MenuItem(_("Check Spellin_g..."), true));
     mi->signal_activate().connect(sigc::mem_fun(*this, &ContextMenu::SpellcheckSettings));
     mi->show();
     insert(*mi,positionOfLastDialog++);
diff --git a/src/ui/dialog/align-and-distribute.cpp b/src/ui/dialog/align-and-distribute.cpp
index ad69bb59c..8e6b5e0e5 100644
--- a/src/ui/dialog/align-and-distribute.cpp
+++ b/src/ui/dialog/align-and-distribute.cpp
@@ -936,7 +936,7 @@ AlignAndDistribute::AlignAndDistribute()
       _nodesTable(),
       _anchorLabel(_("Relative to: ")),
       _anchorLabelNode(_("Relative to: ")),
-      _selgrpLabel(_("_Treat selection as group: "), 1)
+      _selgrpLabel(_("_Treat selection as group: "), true)
 {
     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 
diff --git a/src/ui/dialog/clonetiler.cpp b/src/ui/dialog/clonetiler.cpp
index c1998249d..3346dd595 100644
--- a/src/ui/dialog/clonetiler.cpp
+++ b/src/ui/dialog/clonetiler.cpp
@@ -919,7 +919,7 @@ CloneTiler::CloneTiler () :
 
                 {
                     auto b = Gtk::manage(new Gtk::CheckButton(_("Color")));
-                    bool old = prefs->getBool(prefs_path + "pick_to_color", 0);
+                    bool old = prefs->getBool(prefs_path + "pick_to_color", false);
                     b->set_active(old);
                     b->set_tooltip_text(_("Each clone is painted by the picked color (the original must have unset fill or stroke)"));
                     table_attach (table, b, 0.0, 1, 2);
@@ -928,7 +928,7 @@ CloneTiler::CloneTiler () :
 
                 {
                     auto b = Gtk::manage(new Gtk::CheckButton(_("Opacity")));
-                    bool old = prefs->getBool(prefs_path + "pick_to_opacity", 0);
+                    bool old = prefs->getBool(prefs_path + "pick_to_opacity", false);
                     b->set_active(old);
                     b->set_tooltip_text(_("Each clone's opacity is determined by the picked value in that point"));
                     table_attach (table, b, 0.0, 2, 2);
diff --git a/src/ui/dialog/document-properties.cpp b/src/ui/dialog/document-properties.cpp
index 1dda7f17d..0b47f9bac 100644
--- a/src/ui/dialog/document-properties.cpp
+++ b/src/ui/dialog/document-properties.cpp
@@ -1024,9 +1024,9 @@ void DocumentProperties::build_metadata()
         }
     }
 
-    Gtk::Button *button_save = Gtk::manage (new Gtk::Button(_("_Save as default"),1));
+    Gtk::Button *button_save = Gtk::manage (new Gtk::Button(_("_Save as default"),true));
     button_save->set_tooltip_text(_("Save this metadata as the default metadata"));
-    Gtk::Button *button_load = Gtk::manage (new Gtk::Button(_("Use _default"),1));
+    Gtk::Button *button_load = Gtk::manage (new Gtk::Button(_("Use _default"),true));
     button_load->set_tooltip_text(_("Use the previously saved default metadata here"));
 
     auto box_buttons = Gtk::manage (new Gtk::ButtonBox);
diff --git a/src/ui/dialog/export.cpp b/src/ui/dialog/export.cpp
index 4d61091a2..392587bef 100644
--- a/src/ui/dialog/export.cpp
+++ b/src/ui/dialog/export.cpp
@@ -138,7 +138,7 @@ Export::Export (void) :
     unit_selector(),
     units_label(_("Units:")),
     filename_box(false, 5),
-    browse_label(_("_Export As..."), 1),
+    browse_label(_("_Export As..."), true),
     browse_image(),
     batch_box(false, 5),
     batch_export(_("B_atch export all selected objects"), _("Export each selected object into its own PNG file, using export hints if any (caution, overwrites without asking!)")),
@@ -324,7 +324,7 @@ Export::Export (void) :
     button_box.pack_end(export_button, false, false, 0);
 
     /*Advanced*/
-    Gtk::Label *label_advanced = Gtk::manage(new Gtk::Label(_("Advanced"),1));
+    Gtk::Label *label_advanced = Gtk::manage(new Gtk::Label(_("Advanced"),true));
     expander.set_label_widget(*label_advanced);
     const char* const modes_list[]={"Gray_1", "Gray_2","Gray_4","Gray_8","Gray_16","RGB_8","RGB_16","GrayAlpha_8","GrayAlpha_16","RGBA_8","RGBA_16"};
     for(int i=0; i<11; ++i)
@@ -363,7 +363,7 @@ Export::Export (void) :
     contents->pack_start(singleexport_box);
     contents->pack_start(batch_box);
     contents->pack_start(hide_box);
-    contents->pack_end(button_box, false, 0);
+    contents->pack_end(button_box, false, false);
     contents->pack_end(_prog, Gtk::PACK_EXPAND_WIDGET);
     contents->pack_end(expander, FALSE, FALSE,0);
 
diff --git a/src/ui/dialog/filedialogimpl-gtkmm.cpp b/src/ui/dialog/filedialogimpl-gtkmm.cpp
index 006a59ece..72cca76d3 100644
--- a/src/ui/dialog/filedialogimpl-gtkmm.cpp
+++ b/src/ui/dialog/filedialogimpl-gtkmm.cpp
@@ -1076,7 +1076,7 @@ void FileSaveDialogImplGtk::fileNameEntryChangedCallback()
 
     if (Glib::file_test(fileName, Glib::FILE_TEST_IS_DIR)) {
         set_current_folder(fileName);
-    } else if (/*Glib::file_test(fileName, Glib::FILE_TEST_IS_REGULAR)*/ 1) {
+    } else if (/*Glib::file_test(fileName, Glib::FILE_TEST_IS_REGULAR)*/ true) {
         // dialog with either (1) select a regular file or (2) cd to dir
         // simulate an 'OK'
         set_filename(fileName);
diff --git a/src/ui/dialog/find.cpp b/src/ui/dialog/find.cpp
index a010ac667..d9a43d21b 100644
--- a/src/ui/dialog/find.cpp
+++ b/src/ui/dialog/find.cpp
@@ -71,7 +71,7 @@ Find::Find()
       check_scope_selection(_("Sele_ction"), _("Limit search to the current selection")),
       check_searchin_text(_("_Text"), _("Search in text objects")),
       check_searchin_property(_("_Properties"), _("Search in object properties, styles, attributes and IDs")),
-      vbox_searchin(0, false),
+      vbox_searchin(false, false),
       frame_searchin(_("Search in")),
       frame_scope(_("Scope")),
 
diff --git a/src/ui/dialog/inkscape-preferences.cpp b/src/ui/dialog/inkscape-preferences.cpp
index 06309885c..6092c26d3 100644
--- a/src/ui/dialog/inkscape-preferences.cpp
+++ b/src/ui/dialog/inkscape-preferences.cpp
@@ -493,7 +493,7 @@ void InkscapePreferences::initPageTools()
     this->AddGradientCheckbox(_page_text, "/tools/text", true);
     {
         PrefCheckButton* cb = Gtk::manage( new PrefCheckButton);
-        cb->init ( _("Show font samples in the drop-down list"), "/tools/text/show_sample_in_list", 1);
+        cb->init ( _("Show font samples in the drop-down list"), "/tools/text/show_sample_in_list", true);
         _page_text.add_line( false, "", *cb, "", _("Show font samples alongside font names in the drop-down list in Text bar"));
 
         _font_dialog.init ( _("Show font substitution warning dialog"), "/options/font/substitutedlg", false);
diff --git a/src/ui/dialog/object-properties.cpp b/src/ui/dialog/object-properties.cpp
index a43791d08..8f92050f5 100644
--- a/src/ui/dialog/object-properties.cpp
+++ b/src/ui/dialog/object-properties.cpp
@@ -50,12 +50,12 @@ ObjectProperties::ObjectProperties()
     : UI::Widget::Panel("/dialogs/object/", SP_VERB_DIALOG_ITEM)
     , _blocked (false)
     , _current_item(nullptr)
-    , _label_id(_("_ID:"), 1)
-    , _label_label(_("_Label:"), 1)
-    , _label_title(_("_Title:"), 1)
-    , _label_image_rendering(_("_Image Rendering:"), 1)
-    , _cb_hide(_("_Hide"), 1)
-    , _cb_lock(_("L_ock"), 1)
+    , _label_id(_("_ID:"), true)
+    , _label_label(_("_Label:"), true)
+    , _label_title(_("_Title:"), true)
+    , _label_image_rendering(_("_Image Rendering:"), true)
+    , _cb_hide(_("_Hide"), true)
+    , _cb_lock(_("L_ock"), true)
     , _attr_table(Gtk::manage(new SPAttributeTable()))
     , _desktop(nullptr)
 {
@@ -168,7 +168,7 @@ void ObjectProperties::_init()
     _entry_title.signal_activate().connect(sigc::mem_fun(this, &ObjectProperties::_labelChanged));
 
     /* Create the frame for the object description */
-    Gtk::Label *label_desc = Gtk::manage(new Gtk::Label(_("_Description:"), 1));
+    Gtk::Label *label_desc = Gtk::manage(new Gtk::Label(_("_Description:"), true));
     UI::Widget::Frame *frame_desc = Gtk::manage(new UI::Widget::Frame("", FALSE));
     frame_desc->set_label_widget(*label_desc);
     frame_desc->set_padding (0,0,0,0);
@@ -237,7 +237,7 @@ void ObjectProperties::_init()
 
 
     /* Button for setting the object's id, label, title and description. */
-    Gtk::Button *btn_set = Gtk::manage(new Gtk::Button(_("_Set"), 1));
+    Gtk::Button *btn_set = Gtk::manage(new Gtk::Button(_("_Set"), true));
     btn_set->set_hexpand();
     btn_set->set_valign(Gtk::ALIGN_CENTER);
     grid_cb->attach(*btn_set, 2, 0, 1, 1);
@@ -245,7 +245,7 @@ void ObjectProperties::_init()
     btn_set->signal_clicked().connect(sigc::mem_fun(this, &ObjectProperties::_labelChanged));
 
     /* Create the frame for interactivity options */
-    Gtk::Label *label_interactivity = Gtk::manage(new Gtk::Label(_("_Interactivity"), 1));
+    Gtk::Label *label_interactivity = Gtk::manage(new Gtk::Label(_("_Interactivity"), true));
     _exp_interactivity.set_label_widget(*label_interactivity);
     contents->pack_start(_exp_interactivity, FALSE, FALSE, 0);
 
diff --git a/src/ui/dialog/swatches.cpp b/src/ui/dialog/swatches.cpp
index 7d8729b0e..dbb170025 100644
--- a/src/ui/dialog/swatches.cpp
+++ b/src/ui/dialog/swatches.cpp
@@ -693,7 +693,7 @@ SwatchesPanel::~SwatchesPanel()
 void SwatchesPanel::_build_menu()
 {
     guint panel_size = 0, panel_mode = 0, panel_ratio = 100, panel_border = 0;
-    bool panel_wrap = 0;
+    bool panel_wrap = false;
     if (!_prefs_path.empty()) {
         Inkscape::Preferences *prefs = Inkscape::Preferences::get();
         panel_wrap = prefs->getBool(_prefs_path + "/panel_wrap");
diff --git a/src/ui/dialog/symbols.cpp b/src/ui/dialog/symbols.cpp
index af044eff0..a4d067acd 100644
--- a/src/ui/dialog/symbols.cpp
+++ b/src/ui/dialog/symbols.cpp
@@ -106,7 +106,7 @@ SymbolColumns* SymbolsDialog::getColumns()
 SymbolsDialog::SymbolsDialog( gchar const* prefsPath ) :
   UI::Widget::Panel(prefsPath, SP_VERB_DIALOG_SYMBOLS),
   store(Gtk::ListStore::create(*getColumns())),
-  all_docs_processed(0),
+  all_docs_processed(false),
   icon_view(nullptr),
   current_desktop(nullptr),
   desk_track(),
diff --git a/src/ui/tool/multi-path-manipulator.cpp b/src/ui/tool/multi-path-manipulator.cpp
index 7010f58bf..b80a1e675 100644
--- a/src/ui/tool/multi-path-manipulator.cpp
+++ b/src/ui/tool/multi-path-manipulator.cpp
@@ -616,7 +616,7 @@ bool MultiPathManipulator::event(Inkscape::UI::Tools::ToolBase *event_context, G
             }
 
             if (handled) return true;
-        } while(0);
+        } while(false);
     }
 
 
diff --git a/src/ui/tools/connector-tool.cpp b/src/ui/tools/connector-tool.cpp
index 7481e8470..09f18e630 100644
--- a/src/ui/tools/connector-tool.cpp
+++ b/src/ui/tools/connector-tool.cpp
@@ -242,7 +242,7 @@ void ConnectorTool::setup()
     sp_event_context_read(this, "curvature");
     sp_event_context_read(this, "orthogonal");
     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-    if (prefs->getBool("/tools/connector/selcue", 0)) {
+    if (prefs->getBool("/tools/connector/selcue", false)) {
         this->enableSelectionCue();
     }
 
diff --git a/src/ui/tools/eraser-tool.cpp b/src/ui/tools/eraser-tool.cpp
index 1cd9db6b2..60d572e16 100644
--- a/src/ui/tools/eraser-tool.cpp
+++ b/src/ui/tools/eraser-tool.cpp
@@ -151,7 +151,7 @@ static ProfileFloatElement f_profile[PROFILE_FLOAT_SIZE] = {
     //TODO not sure why get 0.01 if slider width == 0, maybe a double/int problem
 
     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-    if (prefs->getBool("/tools/eraser/selcue", 0) != 0) {
+    if (prefs->getBool("/tools/eraser/selcue", false) != 0) {
     	this->enableSelectionCue();
     }
 
diff --git a/src/ui/tools/measure-tool.cpp b/src/ui/tools/measure-tool.cpp
index 633bf6ec3..2048dce23 100644
--- a/src/ui/tools/measure-tool.cpp
+++ b/src/ui/tools/measure-tool.cpp
@@ -1177,7 +1177,7 @@ void MeasureTool::showInfoBox(Geom::Point cursor, bool into_groups)
         if(newover != over){
             over = newover;
             Preferences *prefs = Preferences::get();
-            int prefs_bbox = prefs->getBool("/tools/bounding_box", 0);
+            int prefs_bbox = prefs->getBool("/tools/bounding_box", false);
             SPItem::BBoxType bbox_type = !prefs_bbox ? SPItem::VISUAL_BBOX : SPItem::GEOMETRIC_BBOX;
             Geom::OptRect bbox = over->bounds(bbox_type);
             if (bbox) {
diff --git a/src/ui/tools/pen-tool.cpp b/src/ui/tools/pen-tool.cpp
index c5855540b..e7301152f 100644
--- a/src/ui/tools/pen-tool.cpp
+++ b/src/ui/tools/pen-tool.cpp
@@ -1291,7 +1291,7 @@ void PenTool::_setAngleDistanceStatusMessage(Geom::Point const p, int pc_point_t
     Glib::ustring dist = q.string(desktop->namedview->display_units);
     double angle = atan2(rel[Geom::Y], rel[Geom::X]) * 180 / M_PI;
     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-    if (prefs->getBool("/options/compassangledisplay/value", 0) != 0) {
+    if (prefs->getBool("/options/compassangledisplay/value", false) != 0) {
         angle = 90 - angle;
         if (angle < 0) {
             angle += 360;
diff --git a/src/ui/tools/text-tool.cpp b/src/ui/tools/text-tool.cpp
index f4f20ef30..8ed03ece1 100644
--- a/src/ui/tools/text-tool.cpp
+++ b/src/ui/tools/text-tool.cpp
@@ -452,7 +452,7 @@ static void insert_uni_char(TextTool *const tc)
     } else {
         if (!tc->text) { // printable key; create text if none (i.e. if nascent_object)
             sp_text_context_setup_text(tc);
-            tc->nascent_object = 0; // we don't need it anymore, having created a real <text>
+            tc->nascent_object = false; // we don't need it anymore, having created a real <text>
         }
 
         gchar u[10];
@@ -539,7 +539,7 @@ bool TextTool::root_handler(GdkEvent* event) {
                                     GDK_KEY_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK,
                                     nullptr, event->button.time);
                 this->grabbed = SP_CANVAS_ITEM(desktop->acetate);
-                this->creating = 1;
+                this->creating = true;
 
                 /* Processed */
                 return TRUE;
@@ -547,7 +547,7 @@ bool TextTool::root_handler(GdkEvent* event) {
             break;
         case GDK_MOTION_NOTIFY:
             if (this->over_text) {
-                this->over_text = 0;
+                this->over_text = false;
                 // update cursor and statusbar: we are not over a text object now
                 this->cursor_shape = cursor_text_xpm;
                 this->sp_event_context_update_cursor();
@@ -615,8 +615,8 @@ bool TextTool::root_handler(GdkEvent* event) {
                     desktop->getSelection()->clear();
                     this->pdoc = desktop->dt2doc(p1);
                     this->show = TRUE;
-                    this->phase = 1;
-                    this->nascent_object = 1; // new object was just created
+                    this->phase = true;
+                    this->nascent_object = true; // new object was just created
 
                     /* Cursor */
                     sp_canvas_item_show(this->cursor);
@@ -780,7 +780,7 @@ bool TextTool::root_handler(GdkEvent* event) {
                                     /* No-break space */
                                     if (!this->text) { // printable key; create text if none (i.e. if nascent_object)
                                         sp_text_context_setup_text(this);
-                                        this->nascent_object = 0; // we don't need it anymore, having created a real <text>
+                                        this->nascent_object = false; // we don't need it anymore, having created a real <text>
                                     }
                                     this->text_sel_start = this->text_sel_end = sp_te_replace(this->text, this->text_sel_start, this->text_sel_end, "\302\240");
                                     sp_text_context_update_cursor(this);
@@ -865,7 +865,7 @@ bool TextTool::root_handler(GdkEvent* event) {
                             {
                                 if (!this->text) { // printable key; create text if none (i.e. if nascent_object)
                                     sp_text_context_setup_text(this);
-                                    this->nascent_object = 0; // we don't need it anymore, having created a real <text>
+                                    this->nascent_object = false; // we don't need it anymore, having created a real <text>
                                 }
 
                                 iterator_pair enter_pair;
@@ -1095,7 +1095,7 @@ bool TextTool::root_handler(GdkEvent* event) {
                                 return TRUE;
                             case GDK_KEY_Escape:
                                 if (this->creating) {
-                                    this->creating = 0;
+                                    this->creating = false;
                                     if (this->grabbed) {
                                         sp_canvas_item_ungrab(this->grabbed, GDK_CURRENT_TIME);
                                         this->grabbed = nullptr;
@@ -1217,7 +1217,7 @@ bool TextTool::root_handler(GdkEvent* event) {
                     return TRUE;
                 } else if (group0_keyval == GDK_KEY_Escape) { // cancel rubberband
                     if (this->creating) {
-                        this->creating = 0;
+                        this->creating = false;
                         if (this->grabbed) {
                             sp_canvas_item_ungrab(this->grabbed, GDK_CURRENT_TIME);
                             this->grabbed = nullptr;
@@ -1297,7 +1297,7 @@ bool sp_text_paste_inline(ToolBase *ec)
 
             if (!tc->text) { // create text if none (i.e. if nascent_object)
                 sp_text_context_setup_text(tc);
-                tc->nascent_object = 0; // we don't need it anymore, having created a real <text>
+                tc->nascent_object = false; // we don't need it anymore, having created a real <text>
             }
 
             // using indices is slow in ustrings. Whatever.
@@ -1591,7 +1591,7 @@ static void sp_text_context_update_cursor(TextTool *tc,  bool scroll_to_see)
         }
 
         tc->show = TRUE;
-        tc->phase = 1;
+        tc->phase = true;
 
         Inkscape::Text::Layout const *layout = te_get_layout(tc->text);
         int const nChars = layout->iteratorToCharIndex(layout->end());
@@ -1665,10 +1665,10 @@ static gint sp_text_context_timeout(TextTool *tc)
     if (tc->show) {
         sp_canvas_item_show(tc->cursor);
         if (tc->phase) {
-            tc->phase = 0;
+            tc->phase = false;
             tc->cursor->setRgba32(0x000000ff);
         } else {
-            tc->phase = 1;
+            tc->phase = true;
             tc->cursor->setRgba32(0xffffffff);
         }
     }
@@ -1720,7 +1720,7 @@ static void sptc_commit(GtkIMContext */*imc*/, gchar *string, TextTool *tc)
 {
     if (!tc->text) {
         sp_text_context_setup_text(tc);
-        tc->nascent_object = 0; // we don't need it anymore, having created a real <text>
+        tc->nascent_object = false; // we don't need it anymore, having created a real <text>
     }
 
     tc->text_sel_start = tc->text_sel_end = sp_te_replace(tc->text, tc->text_sel_start, tc->text_sel_end, string);