FIX:speed ctrl in device

1.the speed ctrl shouldn't open popup when the printer is in idle status.
2.add tooltip

Change-Id: I3b0b4c58ef1c1961835ee2e06b2e7f3cccb53428

src/slic3r/GUI/StatusPanel.cpp

@@ -2290,7 +2290,7 @@ void StatusPanel::on_switch_speed(wxCommandEvent &event)
     popUp->SetSizer(sizer);
     auto em = em_unit(this);
     popUp->SetSize(em * 36, em * 8);
-
+    step->SetHint(_L("This only takes effect during printing"));
     step->AppendItem(_L("Silent"), "");
     step->AppendItem(_L("Standard"), "");
     step->AppendItem(_L("Sport"), "");
@@ -2306,6 +2306,11 @@ void StatusPanel::on_switch_speed(wxCommandEvent &event)
     }
     step->SelectItem(selected_item);
     
+    if (!obj->is_in_printing()) {
+        step->Bind(wxEVT_LEFT_DOWN, [](auto& e) {
+            return; });
+    }
+
     step->Bind(EVT_STEP_CHANGED, [this](auto &e) {
         this->speed_lvl        = e.GetInt() + 1;
         if (obj) {

src/slic3r/GUI/Widgets/StepCtrl.cpp

@@ -58,6 +58,10 @@ bool StepCtrlBase::SetTipFont(wxFont const& font)
     return true;
 }
 
+void StepCtrlBase::SetHint(wxString hint) {
+    this->hint = hint;
+}
+
 int StepCtrlBase::AppendItem(const wxString &item, wxString const & tip)
 {
     steps.push_back(item);
@@ -181,6 +185,12 @@ void StepCtrl::doRender(wxDC &dc)
     int circleY = size.y / 2;
     dc.SetPen(wxPen(clr_step.colorForStates(states)));
     dc.SetBrush(wxBrush(clr_step.colorForStates(states)));
+    if (!hint.empty()) {
+        dc.SetFont(font_tip);
+        dc.SetTextForeground(clr_tip.colorForStates(states));
+        wxSize sz = dc.GetTextExtent(hint);
+        dc.DrawText(hint, dc.GetCharWidth(), circleY - FromDIP(20) - sz.y);
+    }
     for (int i = 0; i < steps.size(); ++i) {
         bool check = (pos_thumb == wxPoint{0, 0} ? step : pos_thumb.y) == i;
         dc.DrawEllipse(circleX - radius, circleY - radius, radius * 2, radius * 2);

src/slic3r/GUI/Widgets/StepCtrl.hpp

@@ -19,6 +19,7 @@ protected:
 
     std::vector<wxString> steps;
     std::vector<wxString> tips;
+    wxString hint;
 
     int step = -1;
 
@@ -35,6 +36,8 @@ public:
     ~StepCtrlBase();
 
 public:
+    void SetHint(wxString hint);
+
     bool SetTipFont(wxFont const & font);
 
 public: