@@ -4877,6 +4877,156 @@ static void ShowDemoWindowLayout()
48774877
48784878 ImGui::TreePop();
48794879 }
4880+
4881+ #if IMGUI_HAS_STACK_LAYOUT
4882+ IMGUI_DEMO_MARKER("Layout/Stack Layout");
4883+ if (ImGui::TreeNode("Stack Layout"))
4884+ {
4885+ static bool widget_a = true, widget_b = true, widget_c = true;
4886+ static bool spring_a = true, spring_ab = true, spring_bc = true, spring_c = true;
4887+ static bool minimize_width = false, minimize_height = true;
4888+ static bool horizontal = true, draw_springs = true;
4889+ static ImVec2 item_spacing = ImGui::GetStyle().ItemSpacing;
4890+ static float a_c_spring_weight = 0.0f;
4891+ static float ab_spring_weight = 0.5f;
4892+ static float alignment = 0.5f;
4893+
4894+ struct funcs
4895+ {
4896+ static void VisibleSpring(float spring_weight)
4897+ {
4898+ ImGui::Spring(spring_weight);
4899+ if (!draw_springs)
4900+ return;
4901+
4902+ ImVec2 rect_min = ImGui::GetItemRectMin();
4903+ ImVec2 rect_max = ImGui::GetItemRectMax();
4904+
4905+ ImVec2 rect_size = ImGui::GetItemRectSize();
4906+ if (rect_size.x <= 0.0f && rect_size.y <= 0.0f)
4907+ return;
4908+
4909+ // Draw zig-zag
4910+ float width = 0.0f, spacing = 0.0f;
4911+ ImVec2 direction, origin;
4912+ ImVec2 spacing_min, spring_max;
4913+
4914+ if (horizontal)
4915+ {
4916+ spacing = floorf(item_spacing.x);
4917+ width = rect_size.x - spacing;
4918+ origin = ImVec2(floorf(rect_min.x), floorf(rect_min.y + (rect_max.y - rect_min.y) / 2));
4919+ direction = ImVec2(1.0f, 0.0f);
4920+ spring_max = ImVec2(rect_min.x + width, rect_max.y);
4921+ spacing_min = ImVec2(rect_min.x + width, rect_min.y);
4922+ }
4923+ else
4924+ {
4925+ spacing = floorf(item_spacing.y);
4926+ width = rect_size.y - spacing;
4927+ origin = ImVec2(floorf(rect_min.x + (rect_max.x - rect_min.x) / 2), floorf(rect_min.y));
4928+ direction = ImVec2(0.0f, 1.0f);
4929+ spring_max = ImVec2(rect_max.x, rect_min.y + width);
4930+ spacing_min = ImVec2(rect_min.x, rect_min.y + width);
4931+ }
4932+
4933+ if (spring_weight <= 0.0f && spacing <= 0.0f)
4934+ return;
4935+
4936+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
4937+
4938+ draw_list->PushClipRect(rect_min, rect_max, true);
4939+
4940+ draw_list->AddRectFilled(rect_min, spring_max, ImColor(80, 20, 80));
4941+ draw_list->AddRectFilled(spacing_min, rect_max, ImColor(80, 20, 20));
4942+
4943+ const float zig_zag_size = 3;
4944+ ImVec2 normal = ImVec2(-direction.y, direction.x);
4945+
4946+ draw_list->PathClear();
4947+ origin.x += 0.5f;
4948+ origin.y += 0.5f;
4949+ draw_list->PathLineTo(origin);
4950+ for (float x = zig_zag_size * 0.5f; x <= width; x += zig_zag_size)
4951+ {
4952+ ImVec2 p;
4953+ p.x = origin.x + direction.x * x + normal.x * zig_zag_size;
4954+ p.y = origin.y + direction.y * x + normal.y * zig_zag_size;
4955+ draw_list->PathLineTo(p);
4956+ normal = ImVec2(-normal.x, -normal.y);
4957+ }
4958+ draw_list->PathStroke(ImColor(255, 255, 255, 190), false, 1.0f);
4959+
4960+ draw_list->PopClipRect();
4961+ }
4962+ };
4963+
4964+ ImGui::Checkbox("Widget A", &widget_a); ImGui::SameLine();
4965+ ImGui::Checkbox("Widget B", &widget_b); ImGui::SameLine();
4966+ ImGui::Checkbox("Widget C", &widget_c);
4967+ ImGui::Checkbox("Spring A", &spring_a); ImGui::SameLine();
4968+ ImGui::Checkbox("Spring AB", &spring_ab); ImGui::SameLine();
4969+ ImGui::Checkbox("Spring BC", &spring_bc); ImGui::SameLine();
4970+ ImGui::Checkbox("Spring C", &spring_c);
4971+ ImGui::Checkbox("Horizontal", &horizontal); ImGui::SameLine();
4972+ ImGui::Checkbox("Minimize Width", &minimize_width); ImGui::SameLine();
4973+ ImGui::Checkbox("Minimize Height", &minimize_height);
4974+ ImGui::Checkbox("Draw Springs", &draw_springs); ImGui::SameLine();
4975+ ImGui::TextUnformatted(" "); ImGui::SameLine();
4976+ ImGui::ColorButton("- Spring", ImColor(80, 20, 80), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
4977+ ImGui::TextUnformatted("Spring"); ImGui::SameLine();
4978+ ImGui::TextUnformatted(" "); ImGui::SameLine();
4979+ ImGui::ColorButton("- Spacing", ImColor(80, 20, 20), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
4980+ ImGui::TextUnformatted("Item Spacing");
4981+ ImGui::DragFloat("Item Spacing", horizontal ? &item_spacing.x : &item_spacing.y, 0.1f, 0.0f, 50.0f);
4982+ ImGui::DragFloat("A & C Spring Weight", &a_c_spring_weight, 0.002f, 0.0f, 1.0f);
4983+ ImGui::DragFloat("AB Spring Weight", &ab_spring_weight, 0.002f, 0.0f, 1.0f);
4984+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("BC Spring Weight = 1 - AB Spring Weight");
4985+ ImGui::DragFloat("Minor Axis Alignment", &alignment, 0.002f, 0.0f, 1.0f);
4986+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("This is vertical alignment for horizontal layouts and horizontal alignment for vertical layouts.");
4987+ ImGui::Text("Layout widgets:");
4988+ ImGui::Text("| Spring A | Widget A | Spring AB | Widget B | Spring BC | Widget C | Spring C |");
4989+
4990+ ImGui::Spacing();
4991+
4992+ ImVec2 widget_size;
4993+ widget_size.x = floorf(ImGui::GetContentRegionAvail().x / 4);
4994+ widget_size.y = horizontal ? floorf(widget_size.x / 3) : widget_size.x;
4995+
4996+ ImVec2 small_widget_size = widget_size;
4997+ if (horizontal)
4998+ small_widget_size.y = floorf(small_widget_size.y / 2);
4999+ else
5000+ small_widget_size.x = floorf(small_widget_size.x / 2);
5001+
5002+ ImVec2 layout_size = ImVec2(widget_size.x * 4, widget_size.y * 4);
5003+ if (minimize_width) layout_size.x = 0.0f;
5004+ if (minimize_height) layout_size.y = 0.0f;
5005+
5006+ // Minor axis alignment can be set by style or directly in BeginHorizontal/BeginVertical
5007+ // Example:
5008+ // ImGui::PushStyleVar(ImGuiStyleVar_LayoutAlign, alignment);
5009+
5010+ ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(floorf(item_spacing.x), floorf(item_spacing.y)));
5011+
5012+ if (horizontal) { ImGui::BeginHorizontal("h1", layout_size, alignment); } else { ImGui::BeginVertical("v1", layout_size, alignment); }
5013+ if (spring_a) { funcs::VisibleSpring(a_c_spring_weight); }
5014+ if (widget_a) { ImGui::Button("Widget A", widget_size); }
5015+ if (spring_ab) { funcs::VisibleSpring(ab_spring_weight); }
5016+ if (widget_b) { ImGui::Button("Widget B", small_widget_size); }
5017+ if (spring_bc) { funcs::VisibleSpring(1.0f - ab_spring_weight); }
5018+ if (widget_c) { ImGui::Button("Widget C", widget_size); }
5019+ if (spring_c) { funcs::VisibleSpring(a_c_spring_weight); }
5020+ if (horizontal) { ImGui::EndHorizontal(); } else { ImGui::EndVertical(); }
5021+
5022+ ImGui::PopStyleVar();
5023+
5024+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
5025+ draw_list->AddRect(ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), ImGui::GetColorU32(ImGuiCol_Border));
5026+
5027+ ImGui::TreePop();
5028+ }
5029+ #endif // IMGUI_HAS_STACK_LAYOUT
48805030}
48815031
48825032//-----------------------------------------------------------------------------
0 commit comments