Removed the inconsistent shadow under RenderCollapseTriangle() (~#707)

imgui.cpp

@@ -2929,7 +2929,7 @@ void ImGui::RenderFrame(ImVec2 p_min, ImVec2 p_max, ImU32 fill_col, bool border,
 }
 
 // Render a triangle to denote expanded/collapsed state
-void ImGui::RenderCollapseTriangle(ImVec2 p_min, bool is_open, float scale, bool shadow)
+void ImGui::RenderCollapseTriangle(ImVec2 p_min, bool is_open, float scale)
 {
     ImGuiContext& g = *GImGui;
     ImGuiWindow* window = GetCurrentWindow();
@@ -2953,8 +2953,6 @@ void ImGui::RenderCollapseTriangle(ImVec2 p_min, bool is_open, float scale, bool
         c = center + ImVec2(-0.500f,-0.866f)*r;
     }
 
-    if (shadow && (window->Flags & ImGuiWindowFlags_ShowBorders) != 0)
-        window->DrawList->AddTriangleFilled(a+ImVec2(2,2), b+ImVec2(2,2), c+ImVec2(2,2), GetColorU32(ImGuiCol_BorderShadow));
     window->DrawList->AddTriangleFilled(a, b, c, GetColorU32(ImGuiCol_Text));
 }
 
@@ -4312,7 +4310,7 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
 
             const ImVec2 text_size = CalcTextSize(name, NULL, true);
             if (!(flags & ImGuiWindowFlags_NoCollapse))
-                RenderCollapseTriangle(window->Pos + style.FramePadding, !window->Collapsed, 1.0f, true);
+                RenderCollapseTriangle(window->Pos + style.FramePadding, !window->Collapsed, 1.0f);
 
             ImVec2 text_min = window->Pos;
             ImVec2 text_max = window->Pos + ImVec2(window->Size.x, style.FramePadding.y*2 + text_size.y);
@@ -5950,7 +5948,7 @@ bool ImGui::TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* l
     {
         // Framed type
         RenderFrame(bb.Min, bb.Max, col, true, style.FrameRounding);
-        RenderCollapseTriangle(bb.Min + padding + ImVec2(0.0f, text_base_offset_y), is_open, 1.0f, true);
+        RenderCollapseTriangle(bb.Min + padding + ImVec2(0.0f, text_base_offset_y), is_open, 1.0f);
         if (g.LogEnabled)
         {
             // NB: '##' is normally used to hide text (as a library-wide feature), so we need to specify the text range to make sure the ## aren't stripped out here.
@@ -5974,7 +5972,7 @@ bool ImGui::TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* l
         if (flags & ImGuiTreeNodeFlags_Bullet)
             RenderBullet(bb.Min + ImVec2(text_offset_x * 0.5f, g.FontSize*0.50f + text_base_offset_y));
         else if (!(flags & ImGuiTreeNodeFlags_Leaf))
-            RenderCollapseTriangle(bb.Min + ImVec2(padding.x, g.FontSize*0.15f + text_base_offset_y), is_open, 0.70f, false);
+            RenderCollapseTriangle(bb.Min + ImVec2(padding.x, g.FontSize*0.15f + text_base_offset_y), is_open, 0.70f);
         if (g.LogEnabled)
             LogRenderedText(text_pos, ">");
         RenderText(text_pos, label, label_end, false);

imgui_internal.h

@@ -717,7 +717,7 @@ namespace ImGui
     IMGUI_API void          RenderTextWrapped(ImVec2 pos, const char* text, const char* text_end, float wrap_width);
     IMGUI_API void          RenderTextClipped(const ImVec2& pos_min, const ImVec2& pos_max, const char* text, const char* text_end, const ImVec2* text_size_if_known, const ImVec2& align = ImVec2(0,0), const ImRect* clip_rect = NULL);
     IMGUI_API void          RenderFrame(ImVec2 p_min, ImVec2 p_max, ImU32 fill_col, bool border = true, float rounding = 0.0f);
-    IMGUI_API void          RenderCollapseTriangle(ImVec2 pos, bool is_open, float scale = 1.0f, bool shadow = false);
+    IMGUI_API void          RenderCollapseTriangle(ImVec2 pos, bool is_open, float scale = 1.0f);
     IMGUI_API void          RenderBullet(ImVec2 pos);
     IMGUI_API void          RenderCheckMark(ImVec2 pos, ImU32 col);
     IMGUI_API const char*   FindRenderedTextEnd(const char* text, const char* text_end = NULL); // Find the optional ## from which we stop displaying text.