@@ -4906,6 +4906,156 @@ static void ShowDemoWindowLayout()
49064906
49074907 ImGui::TreePop();
49084908 }
4909+
4910+ #if IMGUI_HAS_STACK_LAYOUT
4911+ IMGUI_DEMO_MARKER("Layout/Stack Layout");
4912+ if (ImGui::TreeNode("Stack Layout"))
4913+ {
4914+ static bool widget_a = true, widget_b = true, widget_c = true;
4915+ static bool spring_a = true, spring_ab = true, spring_bc = true, spring_c = true;
4916+ static bool minimize_width = false, minimize_height = true;
4917+ static bool horizontal = true, draw_springs = true;
4918+ static ImVec2 item_spacing = ImGui::GetStyle().ItemSpacing;
4919+ static float a_c_spring_weight = 0.0f;
4920+ static float ab_spring_weight = 0.5f;
4921+ static float alignment = 0.5f;
4922+
4923+ struct funcs
4924+ {
4925+ static void VisibleSpring(float spring_weight)
4926+ {
4927+ ImGui::Spring(spring_weight);
4928+ if (!draw_springs)
4929+ return;
4930+
4931+ ImVec2 rect_min = ImGui::GetItemRectMin();
4932+ ImVec2 rect_max = ImGui::GetItemRectMax();
4933+
4934+ ImVec2 rect_size = ImGui::GetItemRectSize();
4935+ if (rect_size.x <= 0.0f && rect_size.y <= 0.0f)
4936+ return;
4937+
4938+ // Draw zig-zag
4939+ float width = 0.0f, spacing = 0.0f;
4940+ ImVec2 direction, origin;
4941+ ImVec2 spacing_min, spring_max;
4942+
4943+ if (horizontal)
4944+ {
4945+ spacing = floorf(item_spacing.x);
4946+ width = rect_size.x - spacing;
4947+ origin = ImVec2(floorf(rect_min.x), floorf(rect_min.y + (rect_max.y - rect_min.y) / 2));
4948+ direction = ImVec2(1.0f, 0.0f);
4949+ spring_max = ImVec2(rect_min.x + width, rect_max.y);
4950+ spacing_min = ImVec2(rect_min.x + width, rect_min.y);
4951+ }
4952+ else
4953+ {
4954+ spacing = floorf(item_spacing.y);
4955+ width = rect_size.y - spacing;
4956+ origin = ImVec2(floorf(rect_min.x + (rect_max.x - rect_min.x) / 2), floorf(rect_min.y));
4957+ direction = ImVec2(0.0f, 1.0f);
4958+ spring_max = ImVec2(rect_max.x, rect_min.y + width);
4959+ spacing_min = ImVec2(rect_min.x, rect_min.y + width);
4960+ }
4961+
4962+ if (spring_weight <= 0.0f && spacing <= 0.0f)
4963+ return;
4964+
4965+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
4966+
4967+ draw_list->PushClipRect(rect_min, rect_max, true);
4968+
4969+ draw_list->AddRectFilled(rect_min, spring_max, ImColor(80, 20, 80));
4970+ draw_list->AddRectFilled(spacing_min, rect_max, ImColor(80, 20, 20));
4971+
4972+ const float zig_zag_size = 3;
4973+ ImVec2 normal = ImVec2(-direction.y, direction.x);
4974+
4975+ draw_list->PathClear();
4976+ origin.x += 0.5f;
4977+ origin.y += 0.5f;
4978+ draw_list->PathLineTo(origin);
4979+ for (float x = zig_zag_size * 0.5f; x <= width; x += zig_zag_size)
4980+ {
4981+ ImVec2 p;
4982+ p.x = origin.x + direction.x * x + normal.x * zig_zag_size;
4983+ p.y = origin.y + direction.y * x + normal.y * zig_zag_size;
4984+ draw_list->PathLineTo(p);
4985+ normal = ImVec2(-normal.x, -normal.y);
4986+ }
4987+ draw_list->PathStroke(ImColor(255, 255, 255, 190), false, 1.0f);
4988+
4989+ draw_list->PopClipRect();
4990+ }
4991+ };
4992+
4993+ ImGui::Checkbox("Widget A", &widget_a); ImGui::SameLine();
4994+ ImGui::Checkbox("Widget B", &widget_b); ImGui::SameLine();
4995+ ImGui::Checkbox("Widget C", &widget_c);
4996+ ImGui::Checkbox("Spring A", &spring_a); ImGui::SameLine();
4997+ ImGui::Checkbox("Spring AB", &spring_ab); ImGui::SameLine();
4998+ ImGui::Checkbox("Spring BC", &spring_bc); ImGui::SameLine();
4999+ ImGui::Checkbox("Spring C", &spring_c);
5000+ ImGui::Checkbox("Horizontal", &horizontal); ImGui::SameLine();
5001+ ImGui::Checkbox("Minimize Width", &minimize_width); ImGui::SameLine();
5002+ ImGui::Checkbox("Minimize Height", &minimize_height);
5003+ ImGui::Checkbox("Draw Springs", &draw_springs); ImGui::SameLine();
5004+ ImGui::TextUnformatted(" "); ImGui::SameLine();
5005+ ImGui::ColorButton("- Spring", ImColor(80, 20, 80), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
5006+ ImGui::TextUnformatted("Spring"); ImGui::SameLine();
5007+ ImGui::TextUnformatted(" "); ImGui::SameLine();
5008+ ImGui::ColorButton("- Spacing", ImColor(80, 20, 20), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
5009+ ImGui::TextUnformatted("Item Spacing");
5010+ ImGui::DragFloat("Item Spacing", horizontal ? &item_spacing.x : &item_spacing.y, 0.1f, 0.0f, 50.0f);
5011+ ImGui::DragFloat("A & C Spring Weight", &a_c_spring_weight, 0.002f, 0.0f, 1.0f);
5012+ ImGui::DragFloat("AB Spring Weight", &ab_spring_weight, 0.002f, 0.0f, 1.0f);
5013+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("BC Spring Weight = 1 - AB Spring Weight");
5014+ ImGui::DragFloat("Minor Axis Alignment", &alignment, 0.002f, 0.0f, 1.0f);
5015+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("This is vertical alignment for horizontal layouts and horizontal alignment for vertical layouts.");
5016+ ImGui::Text("Layout widgets:");
5017+ ImGui::Text("| Spring A | Widget A | Spring AB | Widget B | Spring BC | Widget C | Spring C |");
5018+
5019+ ImGui::Spacing();
5020+
5021+ ImVec2 widget_size;
5022+ widget_size.x = floorf(ImGui::GetContentRegionAvail().x / 4);
5023+ widget_size.y = horizontal ? floorf(widget_size.x / 3) : widget_size.x;
5024+
5025+ ImVec2 small_widget_size = widget_size;
5026+ if (horizontal)
5027+ small_widget_size.y = floorf(small_widget_size.y / 2);
5028+ else
5029+ small_widget_size.x = floorf(small_widget_size.x / 2);
5030+
5031+ ImVec2 layout_size = ImVec2(widget_size.x * 4, widget_size.y * 4);
5032+ if (minimize_width) layout_size.x = 0.0f;
5033+ if (minimize_height) layout_size.y = 0.0f;
5034+
5035+ // Minor axis alignment can be set by style or directly in BeginHorizontal/BeginVertical
5036+ // Example:
5037+ // ImGui::PushStyleVar(ImGuiStyleVar_LayoutAlign, alignment);
5038+
5039+ ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(floorf(item_spacing.x), floorf(item_spacing.y)));
5040+
5041+ if (horizontal) { ImGui::BeginHorizontal("h1", layout_size, alignment); } else { ImGui::BeginVertical("v1", layout_size, alignment); }
5042+ if (spring_a) { funcs::VisibleSpring(a_c_spring_weight); }
5043+ if (widget_a) { ImGui::Button("Widget A", widget_size); }
5044+ if (spring_ab) { funcs::VisibleSpring(ab_spring_weight); }
5045+ if (widget_b) { ImGui::Button("Widget B", small_widget_size); }
5046+ if (spring_bc) { funcs::VisibleSpring(1.0f - ab_spring_weight); }
5047+ if (widget_c) { ImGui::Button("Widget C", widget_size); }
5048+ if (spring_c) { funcs::VisibleSpring(a_c_spring_weight); }
5049+ if (horizontal) { ImGui::EndHorizontal(); } else { ImGui::EndVertical(); }
5050+
5051+ ImGui::PopStyleVar();
5052+
5053+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
5054+ draw_list->AddRect(ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), ImGui::GetColorU32(ImGuiCol_Border));
5055+
5056+ ImGui::TreePop();
5057+ }
5058+ #endif // IMGUI_HAS_STACK_LAYOUT
49095059}
49105060
49115061//-----------------------------------------------------------------------------
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