@@ -4836,6 +4836,156 @@ static void ShowDemoWindowLayout()
48364836
48374837 ImGui::TreePop();
48384838 }
4839+
4840+ #if IMGUI_HAS_STACK_LAYOUT
4841+ IMGUI_DEMO_MARKER("Layout/Stack Layout");
4842+ if (ImGui::TreeNode("Stack Layout"))
4843+ {
4844+ static bool widget_a = true, widget_b = true, widget_c = true;
4845+ static bool spring_a = true, spring_ab = true, spring_bc = true, spring_c = true;
4846+ static bool minimize_width = false, minimize_height = true;
4847+ static bool horizontal = true, draw_springs = true;
4848+ static ImVec2 item_spacing = ImGui::GetStyle().ItemSpacing;
4849+ static float a_c_spring_weight = 0.0f;
4850+ static float ab_spring_weight = 0.5f;
4851+ static float alignment = 0.5f;
4852+
4853+ struct funcs
4854+ {
4855+ static void VisibleSpring(float spring_weight)
4856+ {
4857+ ImGui::Spring(spring_weight);
4858+ if (!draw_springs)
4859+ return;
4860+
4861+ ImVec2 rect_min = ImGui::GetItemRectMin();
4862+ ImVec2 rect_max = ImGui::GetItemRectMax();
4863+
4864+ ImVec2 rect_size = ImGui::GetItemRectSize();
4865+ if (rect_size.x <= 0.0f && rect_size.y <= 0.0f)
4866+ return;
4867+
4868+ // Draw zig-zag
4869+ float width = 0.0f, spacing = 0.0f;
4870+ ImVec2 direction, origin;
4871+ ImVec2 spacing_min, spring_max;
4872+
4873+ if (horizontal)
4874+ {
4875+ spacing = floorf(item_spacing.x);
4876+ width = rect_size.x - spacing;
4877+ origin = ImVec2(floorf(rect_min.x), floorf(rect_min.y + (rect_max.y - rect_min.y) / 2));
4878+ direction = ImVec2(1.0f, 0.0f);
4879+ spring_max = ImVec2(rect_min.x + width, rect_max.y);
4880+ spacing_min = ImVec2(rect_min.x + width, rect_min.y);
4881+ }
4882+ else
4883+ {
4884+ spacing = floorf(item_spacing.y);
4885+ width = rect_size.y - spacing;
4886+ origin = ImVec2(floorf(rect_min.x + (rect_max.x - rect_min.x) / 2), floorf(rect_min.y));
4887+ direction = ImVec2(0.0f, 1.0f);
4888+ spring_max = ImVec2(rect_max.x, rect_min.y + width);
4889+ spacing_min = ImVec2(rect_min.x, rect_min.y + width);
4890+ }
4891+
4892+ if (spring_weight <= 0.0f && spacing <= 0.0f)
4893+ return;
4894+
4895+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
4896+
4897+ draw_list->PushClipRect(rect_min, rect_max, true);
4898+
4899+ draw_list->AddRectFilled(rect_min, spring_max, ImColor(80, 20, 80));
4900+ draw_list->AddRectFilled(spacing_min, rect_max, ImColor(80, 20, 20));
4901+
4902+ const float zig_zag_size = 3;
4903+ ImVec2 normal = ImVec2(-direction.y, direction.x);
4904+
4905+ draw_list->PathClear();
4906+ origin.x += 0.5f;
4907+ origin.y += 0.5f;
4908+ draw_list->PathLineTo(origin);
4909+ for (float x = zig_zag_size * 0.5f; x <= width; x += zig_zag_size)
4910+ {
4911+ ImVec2 p;
4912+ p.x = origin.x + direction.x * x + normal.x * zig_zag_size;
4913+ p.y = origin.y + direction.y * x + normal.y * zig_zag_size;
4914+ draw_list->PathLineTo(p);
4915+ normal = ImVec2(-normal.x, -normal.y);
4916+ }
4917+ draw_list->PathStroke(ImColor(255, 255, 255, 190), false, 1.0f);
4918+
4919+ draw_list->PopClipRect();
4920+ }
4921+ };
4922+
4923+ ImGui::Checkbox("Widget A", &widget_a); ImGui::SameLine();
4924+ ImGui::Checkbox("Widget B", &widget_b); ImGui::SameLine();
4925+ ImGui::Checkbox("Widget C", &widget_c);
4926+ ImGui::Checkbox("Spring A", &spring_a); ImGui::SameLine();
4927+ ImGui::Checkbox("Spring AB", &spring_ab); ImGui::SameLine();
4928+ ImGui::Checkbox("Spring BC", &spring_bc); ImGui::SameLine();
4929+ ImGui::Checkbox("Spring C", &spring_c);
4930+ ImGui::Checkbox("Horizontal", &horizontal); ImGui::SameLine();
4931+ ImGui::Checkbox("Minimize Width", &minimize_width); ImGui::SameLine();
4932+ ImGui::Checkbox("Minimize Height", &minimize_height);
4933+ ImGui::Checkbox("Draw Springs", &draw_springs); ImGui::SameLine();
4934+ ImGui::TextUnformatted(" "); ImGui::SameLine();
4935+ ImGui::ColorButton("- Spring", ImColor(80, 20, 80), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
4936+ ImGui::TextUnformatted("Spring"); ImGui::SameLine();
4937+ ImGui::TextUnformatted(" "); ImGui::SameLine();
4938+ ImGui::ColorButton("- Spacing", ImColor(80, 20, 20), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
4939+ ImGui::TextUnformatted("Item Spacing");
4940+ ImGui::DragFloat("Item Spacing", horizontal ? &item_spacing.x : &item_spacing.y, 0.1f, 0.0f, 50.0f);
4941+ ImGui::DragFloat("A & C Spring Weight", &a_c_spring_weight, 0.002f, 0.0f, 1.0f);
4942+ ImGui::DragFloat("AB Spring Weight", &ab_spring_weight, 0.002f, 0.0f, 1.0f);
4943+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("BC Spring Weight = 1 - AB Spring Weight");
4944+ ImGui::DragFloat("Minor Axis Alignment", &alignment, 0.002f, 0.0f, 1.0f);
4945+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("This is vertical alignment for horizontal layouts and horizontal alignment for vertical layouts.");
4946+ ImGui::Text("Layout widgets:");
4947+ ImGui::Text("| Spring A | Widget A | Spring AB | Widget B | Spring BC | Widget C | Spring C |");
4948+
4949+ ImGui::Spacing();
4950+
4951+ ImVec2 widget_size;
4952+ widget_size.x = floorf(ImGui::GetContentRegionAvail().x / 4);
4953+ widget_size.y = horizontal ? floorf(widget_size.x / 3) : widget_size.x;
4954+
4955+ ImVec2 small_widget_size = widget_size;
4956+ if (horizontal)
4957+ small_widget_size.y = floorf(small_widget_size.y / 2);
4958+ else
4959+ small_widget_size.x = floorf(small_widget_size.x / 2);
4960+
4961+ ImVec2 layout_size = ImVec2(widget_size.x * 4, widget_size.y * 4);
4962+ if (minimize_width) layout_size.x = 0.0f;
4963+ if (minimize_height) layout_size.y = 0.0f;
4964+
4965+ // Minor axis alignment can be set by style or directly in BeginHorizontal/BeginVertical
4966+ // Example:
4967+ // ImGui::PushStyleVar(ImGuiStyleVar_LayoutAlign, alignment);
4968+
4969+ ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(floorf(item_spacing.x), floorf(item_spacing.y)));
4970+
4971+ if (horizontal) { ImGui::BeginHorizontal("h1", layout_size, alignment); } else { ImGui::BeginVertical("v1", layout_size, alignment); }
4972+ if (spring_a) { funcs::VisibleSpring(a_c_spring_weight); }
4973+ if (widget_a) { ImGui::Button("Widget A", widget_size); }
4974+ if (spring_ab) { funcs::VisibleSpring(ab_spring_weight); }
4975+ if (widget_b) { ImGui::Button("Widget B", small_widget_size); }
4976+ if (spring_bc) { funcs::VisibleSpring(1.0f - ab_spring_weight); }
4977+ if (widget_c) { ImGui::Button("Widget C", widget_size); }
4978+ if (spring_c) { funcs::VisibleSpring(a_c_spring_weight); }
4979+ if (horizontal) { ImGui::EndHorizontal(); } else { ImGui::EndVertical(); }
4980+
4981+ ImGui::PopStyleVar();
4982+
4983+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
4984+ draw_list->AddRect(ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), ImGui::GetColorU32(ImGuiCol_Border));
4985+
4986+ ImGui::TreePop();
4987+ }
4988+ #endif // IMGUI_HAS_STACK_LAYOUT
48394989}
48404990
48414991//-----------------------------------------------------------------------------
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