imgui: More refactoring, cut gizmo window positioning

src/slic3r/GUI/GLCanvas3D.cpp

@@ -4405,12 +4405,12 @@ void GLCanvas3D::_resize(unsigned int w, unsigned int h)
 
     auto *imgui = wxGetApp().imgui();
     imgui->set_display_size((float)w, (float)h);
-    imgui->set_font_size(m_canvas->GetFont().GetPixelSize().y);
 #if ENABLE_RETINA_GL
-    imgui->set_style_scaling(m_retina_helper->get_scale_factor());
+    const float scaling = m_retina_helper->get_scale_factor();
 #else
-    imgui->set_style_scaling(m_canvas->GetContentScaleFactor());
+    const float scaling = m_canvas->GetContentScaleFactor();
 #endif
+    imgui->set_scaling(m_canvas->GetFont().GetPixelSize().y, scaling);
 
     // ensures that this canvas is current
     _set_current();

src/slic3r/GUI/Gizmos/GLGizmoCut.cpp

@@ -185,7 +185,10 @@ void GLGizmoCut::on_render_for_picking(const Selection& selection) const
 
 void GLGizmoCut::on_render_input_window(float x, float y, float bottom_limit, const Selection& selection)
 {
+    const float approx_height = m_imgui->scaled(11.0f);
+    y = std::min(y, bottom_limit - approx_height);
     m_imgui->set_next_window_pos(x, y, ImGuiCond_Always);
+
     m_imgui->set_next_window_bg_alpha(0.5f);
     m_imgui->begin(_(L("Cut")), ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoCollapse);
 

src/slic3r/GUI/ImGuiWrapper.cpp

@@ -92,21 +92,18 @@ void ImGuiWrapper::set_display_size(float w, float h)
     io.DisplayFramebufferScale = ImVec2(1.0f, 1.0f);
 }
 
-void ImGuiWrapper::set_font_size(float font_size)
+void ImGuiWrapper::set_scaling(float font_size, float scaling)
 {
-    if (m_font_size != font_size) {
-        m_font_size = font_size;
-        destroy_font();
+    if (m_font_size == font_size && m_style_scaling == scaling) {
+        return;
     }
-}
 
-void ImGuiWrapper::set_style_scaling(float scaling)
-{
-    if (!std::isnan(scaling) && !std::isinf(scaling) && scaling != m_style_scaling) {
-        ImGui::GetStyle().ScaleAllSizes(scaling / m_style_scaling);
-        m_style_scaling = scaling;
-        destroy_font();
-    }
+    m_font_size = font_size;
+
+    ImGui::GetStyle().ScaleAllSizes(scaling / m_style_scaling);
+    m_style_scaling = scaling;
+
+    destroy_font();
 }
 
 bool ImGuiWrapper::update_mouse_data(wxMouseEvent& evt)
@@ -163,8 +160,6 @@ bool ImGuiWrapper::update_key_data(wxKeyEvent &evt)
 
 void ImGuiWrapper::new_frame()
 {
-    printf("ImGuiWrapper: new_frame()\n");
-
     if (m_new_frame_open) {
         return;
     }
@@ -184,6 +179,12 @@ void ImGuiWrapper::render()
     m_new_frame_open = false;
 }
 
+ImVec2 ImGuiWrapper::calc_text_size(const wxString &text)
+{
+    auto text_utf8 = into_u8(text);
+    return ImGui::CalcTextSize(text_utf8.c_str());
+}
+
 void ImGuiWrapper::set_next_window_pos(float x, float y, int flag)
 {
     ImGui::SetNextWindowPos(ImVec2(x, y), (ImGuiCond)flag);
@@ -293,12 +294,6 @@ bool ImGuiWrapper::combo(const wxString& label, const std::vector<std::string>&
     return res;
 }
 
-ImVec2 ImGuiWrapper::calc_text_size(const wxString &text)
-{
-    auto text_utf8 = into_u8(text);
-    return ImGui::CalcTextSize(text_utf8.c_str());
-}
-
 void ImGuiWrapper::disabled_begin(bool disabled)
 {
     wxCHECK_RET(!m_disabled, "ImGUI: Unbalanced disabled_begin() call");
@@ -342,8 +337,6 @@ bool ImGuiWrapper::want_any_input() const
 
 void ImGuiWrapper::init_font()
 {
-    printf("ImGuiWrapper: init_font()\n");
-
     const float font_size = m_font_size * m_style_scaling;
 
     destroy_font();

src/slic3r/GUI/ImGuiWrapper.hpp

@@ -35,8 +35,7 @@ public:
 
     void set_language(const std::string &language);
     void set_display_size(float w, float h);
-    void set_font_size(float font_size);
-    void set_style_scaling(float scaling);
+    void set_scaling(float font_size, float scaling);
     bool update_mouse_data(wxMouseEvent &evt);
     bool update_key_data(wxKeyEvent &evt);
 
@@ -47,7 +46,8 @@ public:
     void render();
 
     float scaled(float x) const { return x * m_font_size * m_style_scaling; }
-    ImVec2 scaled_vec(float x, float y) const { return ImVec2(x * m_font_size * m_style_scaling, y * m_font_size * m_style_scaling); }
+    ImVec2 scaled(float x, float y) const { return ImVec2(x * m_font_size * m_style_scaling, y * m_font_size * m_style_scaling); }
+    ImVec2 calc_text_size(const wxString &text);
 
     void set_next_window_pos(float x, float y, int flag);
     void set_next_window_bg_alpha(float alpha);
@@ -66,8 +66,6 @@ public:
     void text(const wxString &label);
     bool combo(const wxString& label, const std::vector<std::string>& options, int& selection);   // Use -1 to not mark any option as selected
 
-    ImVec2 calc_text_size(const wxString &text);
-
     void disabled_begin(bool disabled);
     void disabled_end();