Added tooltips for reverse buttons

* Corrected default size of undo buttons for GTK
* Experiment with rich tooltips

xs/src/slic3r/GUI/Field.cpp

@@ -20,8 +20,12 @@ namespace Slic3r { namespace GUI {
 
 	void Field::PostInitialize(){
 		auto color = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
-		m_Undo_btn			= new wxButton(m_parent, wxID_ANY, "", wxDefaultPosition, wxSize(16, 16), wxNO_BORDER);
+		auto sz = 16;
-		m_Undo_to_sys_btn	= new wxButton(m_parent, wxID_ANY, "", wxDefaultPosition, wxSize(16, 16), wxNO_BORDER);
+	#ifdef __WXGTK__
+		sz = 28
+	#endif // __WXGTK__
+		m_Undo_btn			= new wxButton(m_parent, wxID_ANY, "", wxDefaultPosition, wxSize(sz,sz), wxNO_BORDER);
+		m_Undo_to_sys_btn	= new wxButton(m_parent, wxID_ANY, "", wxDefaultPosition, wxSize(sz,sz), wxNO_BORDER);
 		if (wxMSW) {
 			m_Undo_btn->SetBackgroundColour(color);
 			m_Undo_to_sys_btn->SetBackgroundColour(color);

xs/src/slic3r/GUI/Tab.cpp

@@ -102,10 +102,42 @@ void Tab::create_preset_tab(PresetBundle *preset_bundle)
 
 	m_undo_btn = new wxButton(panel, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxBU_EXACTFIT | wxNO_BORDER);
 	m_undo_to_sys_btn = new wxButton(panel, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxBU_EXACTFIT | wxNO_BORDER);
+	m_question_btn = new wxButton(panel, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxBU_EXACTFIT | wxNO_BORDER);
+	m_undo_btns_legent = new wxStaticText(panel, wxID_ANY, _(L("For more information about buttons hover the mouse cursor over them.")), wxDefaultPosition, wxDefaultSize);
 	if (wxMSW) {
 		m_undo_btn->SetBackgroundColour(color);
 		m_undo_to_sys_btn->SetBackgroundColour(color);
+		m_question_btn->SetBackgroundColour(color);
 	}
+
+#ifdef __WXMSW__
+	m_undo_to_sys_btn->SetToolTip(_(L(	"Unlocked lock icon indicates about some value changes compared with system values "
+										"in current option group.\n"
+										"Locked lock icon indicates about same values compared with system values "
+										"in current option group.\n"
+										"White bullet icon indicates about nonsystem preset.\n"
+										"Click the unlocked lock to revert all values in current option group to system values.")));
+#else
+	// ToolTips to undo buttons
+	m_undo_btn_tip = new wxRichToolTip("Information about current button",
+		_(L("Unlocked lock icon indicates about some value changes compared with system values "
+			"in current option group.\n"
+			"Locked lock icon indicates about same values compared with system values "
+			"in current option group.\n"
+			"White bullet icon indicates about nonsystem preset.\n"
+			"Click the unlocked lock to revert all values in current option group to system values.")));
+	m_undo_btn_tip->SetIcon(wxICON_INFORMATION);
+	m_undo_btn_tip->ShowFor(m_undo_btn);
+#endif //__WXMSW__
+
+	m_undo_btn->SetToolTip(_(L(	"Back arrow icon indicates about some value changes compared with last saved preset values "
+								"in current option group.\n"
+								"White bullet icon indicates about same values compared with last saved preset values "
+								"in current option group.\n"
+								"Click the Back arrow to revert all values in current option group to last saved preset values.")));
+
+	m_question_btn->SetToolTip(_(L("Hover the cursor over buttons to find more information.")));
+
 	// Bitmaps to be shown on the "Revert to system" aka "Lock to system" button next to each input field.
 	m_bmp_value_lock  	  .LoadFile(from_u8(var("sys_lock.png")),     wxBITMAP_TYPE_PNG);
 	m_bmp_value_unlock	  .LoadFile(from_u8(var("sys_unlock.png")),   wxBITMAP_TYPE_PNG);
@@ -113,10 +145,13 @@ void Tab::create_preset_tab(PresetBundle *preset_bundle)
 	// Bitmaps to be shown on the "Undo user changes" button next to each input field.
 	m_bmp_value_revert	  .LoadFile(from_u8(var("action_undo.png")),  wxBITMAP_TYPE_PNG);
 	m_bmp_white_bullet	  .LoadFile(from_u8(var("bullet_white.png")), wxBITMAP_TYPE_PNG);
+	m_bmp_question        .LoadFile(from_u8(var("question_mark_01.png")), wxBITMAP_TYPE_PNG);
+
 	m_undo_btn->SetBitmap(m_bmp_white_bullet);
-	m_undo_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent){ /*on_back_to_initial_value*/on_roll_back_value(); }));
+	m_undo_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent){ on_roll_back_value(); }));
 	m_undo_to_sys_btn->SetBitmap(m_bmp_white_bullet);
-	m_undo_to_sys_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent){ /*on_back_to_sys_value*/on_roll_back_value(true); }));
+	m_undo_to_sys_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent){ on_roll_back_value(true); }));
+	m_question_btn->SetBitmap(m_bmp_question);
 
 	// Colors for ui "decoration"
 	m_sys_label_clr			= get_sys_label_clr();
@@ -135,6 +170,9 @@ void Tab::create_preset_tab(PresetBundle *preset_bundle)
 	m_hsizer->AddSpacer(64);
 	m_hsizer->Add(m_undo_to_sys_btn, 0, wxALIGN_CENTER_VERTICAL);
 	m_hsizer->Add(m_undo_btn, 0, wxALIGN_CENTER_VERTICAL);
+	m_hsizer->AddSpacer(16);
+	m_hsizer->Add(m_question_btn, 0, wxALIGN_CENTER_VERTICAL);
+	m_hsizer->Add(m_undo_btns_legent, 0, wxALIGN_CENTER_VERTICAL);
 // 	m_hsizer->AddSpacer(64);
 // 	m_hsizer->Add(m_cc_presets_choice, 1, wxLEFT | wxRIGHT | wxTOP | wxALIGN_CENTER_VERTICAL, 3);
 

xs/src/slic3r/GUI/Tab.hpp

@@ -22,6 +22,7 @@
 #include <wx/imaglist.h>
 #include <wx/statbox.h>
 #include <wx/dataview.h>
+#include <wx/richtooltip.h>
 
 #include <map>
 #include <vector>
@@ -110,7 +111,11 @@ protected:
 	wxCheckBox*			m_compatible_printers_checkbox;
 	wxButton*			m_compatible_printers_btn;
 	wxButton*			m_undo_btn;
-	wxButton*			m_undo_to_sys_btn;	
+	wxButton*			m_undo_to_sys_btn;
+	wxButton*			m_question_btn;
+	wxStaticText*		m_undo_btns_legent;
+	wxRichToolTip*		m_undo_btn_tip;
+
 	wxComboCtrl*		m_cc_presets_choice;
 	wxDataViewTreeCtrl*	m_presetctrl;
 	wxImageList*		m_preset_icons;
@@ -128,6 +133,7 @@ protected:
 	// Bitmaps to be shown on the "Undo user changes" button next to each input field.
 	wxBitmap 			m_bmp_value_revert;
 	wxBitmap 			m_bmp_value_unmodified;
+	wxBitmap			m_bmp_question;
 
 	// Colors for ui "decoration"
 	wxColour			m_sys_label_clr;
@@ -171,7 +177,13 @@ public:
 		Create(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxBK_LEFT | wxTAB_TRAVERSAL);
 		get_tabs_list().push_back(this);
 	}
-	~Tab() { delete_tab_from_list(this); }
+	~Tab(){
+		delete_tab_from_list(this);
+		if (m_undo_btn_tip){
+			delete m_undo_btn_tip;
+			m_undo_btn_tip = nullptr;
+		}
+	}
 
 	wxWindow*	parent() const { return m_parent; }
 	wxString	title()	 const { return m_title; }