ColorEdit4: Further tweaks for very small sizes. (#7120, #7121)

docs/CHANGELOG.txt

@@ -72,6 +72,7 @@ Other changes:
   to allow passing through multiple widgets easily. (#3092, #5759, #787)
 - DragScalarN, SliderScalarN, InputScalarN, PushMultiItemsWidths: improve multi-components
   width computation to better distribute the error. (#7120, #7121) [@Nahor]
+- ColorEdit4: Layout tweaks for very small sizes. (#7120, #7121)
 - Menus: Tweaked hover slack logic, adding a timer to avoid situations where a slow vertical
   movements toward another parent BeginMenu() can keep the wrong child menu open. (#6671, #6926)
 - Debug Tools: Added DebugFlashStyleColor() to identify a style color. Added to Style Editor.

imgui_widgets.cpp

@@ -5127,8 +5127,8 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
     ImGuiContext& g = *GImGui;
     const ImGuiStyle& style = g.Style;
     const float square_sz = GetFrameHeight();
-    const float w_full = CalcItemWidth();
     const char* label_display_end = FindRenderedTextEnd(label);
+    float w_full = CalcItemWidth();
     g.NextItemData.ClearFlags();
 
     BeginGroup();
@@ -5163,7 +5163,8 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
     const bool hdr = (flags & ImGuiColorEditFlags_HDR) != 0;
     const int components = alpha ? 4 : 3;
     const float w_button = (flags & ImGuiColorEditFlags_NoSmallPreview) ? 0.0f : (square_sz + style.ItemInnerSpacing.x);
-    const float w_inputs = ImMax(w_full - w_button, 1.0f * components);
+    const float w_inputs = ImMax(w_full - w_button, 1.0f);
+    w_full = w_inputs + w_button;
 
     // Convert to the formats we need
     float f[4] = { col[0], col[1], col[2], alpha ? col[3] : 1.0f };