TextInput: Added possibility to set function on DropDown icon

src/slic3r/GUI/Search.cpp

@@ -533,6 +533,8 @@ void OptionsSearcher::set_search_input(TextInput* input_ctrl)
         event.Skip();
         update_dialog_position();
     });
+
+    search_input->SetOnDropDownIcon([](){ GUI::wxGetApp().show_search_dialog(); });
 }
 
 void OptionsSearcher::add_key(const std::string& opt_key, Preset::Type type, const wxString& group, const wxString& category)

src/slic3r/GUI/Widgets/TextInput.cpp

@@ -86,6 +86,12 @@ void TextInput::Create(wxWindow *     parent,
 
     if (!icon.IsEmpty()) {
         this->drop_down_icon = ScalableBitmap(this, icon.ToStdString(), 16);
+        this->Bind(wxEVT_LEFT_DOWN, [this](wxMouseEvent& event) {
+            const wxPoint pos = event.GetLogicalPosition(wxClientDC(this));
+            if (OnClickDropDownIcon && dd_icon_rect.Contains(pos))
+                OnClickDropDownIcon();
+            event.Skip();
+        });
     }
     messureSize();
 }
@@ -295,6 +301,7 @@ void TextInput::render(wxDC& dc)
         wxSize szIcon = drop_down_icon.GetSize();
         pt_r.x -= szIcon.x + 2;
         pt_r.y = (size.y - szIcon.y) / 2;
+        dd_icon_rect = wxRect(pt_r, szIcon);
         dc.DrawBitmap(drop_down_icon.get_bitmap(), pt_r);
     }
 

src/slic3r/GUI/Widgets/TextInput.hpp

@@ -17,6 +17,9 @@ class TextInput : public wxNavigationEnabled<StaticBox>
     static const int TextInputWidth = 200;
     static const int TextInputHeight = 50;
 
+    wxRect                  dd_icon_rect;
+    std::function<void()>   OnClickDropDownIcon{ nullptr };
+
 public:
     TextInput();
 
@@ -73,6 +76,8 @@ public:
 
     void SysColorsChanged();
 
+    void SetOnDropDownIcon(std::function<void()> click_drop_down_icon_fn) { OnClickDropDownIcon = click_drop_down_icon_fn; }
+
 protected:
     virtual void OnEdit() {}