@@ -4824,6 +4824,156 @@ static void ShowDemoWindowLayout()
48244824
48254825 ImGui::TreePop();
48264826 }
4827+
4828+ #if IMGUI_HAS_STACK_LAYOUT
4829+ IMGUI_DEMO_MARKER("Layout/Stack Layout");
4830+ if (ImGui::TreeNode("Stack Layout"))
4831+ {
4832+ static bool widget_a = true, widget_b = true, widget_c = true;
4833+ static bool spring_a = true, spring_ab = true, spring_bc = true, spring_c = true;
4834+ static bool minimize_width = false, minimize_height = true;
4835+ static bool horizontal = true, draw_springs = true;
4836+ static ImVec2 item_spacing = ImGui::GetStyle().ItemSpacing;
4837+ static float a_c_spring_weight = 0.0f;
4838+ static float ab_spring_weight = 0.5f;
4839+ static float alignment = 0.5f;
4840+
4841+ struct funcs
4842+ {
4843+ static void VisibleSpring(float spring_weight)
4844+ {
4845+ ImGui::Spring(spring_weight);
4846+ if (!draw_springs)
4847+ return;
4848+
4849+ ImVec2 rect_min = ImGui::GetItemRectMin();
4850+ ImVec2 rect_max = ImGui::GetItemRectMax();
4851+
4852+ ImVec2 rect_size = ImGui::GetItemRectSize();
4853+ if (rect_size.x <= 0.0f && rect_size.y <= 0.0f)
4854+ return;
4855+
4856+ // Draw zig-zag
4857+ float width = 0.0f, spacing = 0.0f;
4858+ ImVec2 direction, origin;
4859+ ImVec2 spacing_min, spring_max;
4860+
4861+ if (horizontal)
4862+ {
4863+ spacing = floorf(item_spacing.x);
4864+ width = rect_size.x - spacing;
4865+ origin = ImVec2(floorf(rect_min.x), floorf(rect_min.y + (rect_max.y - rect_min.y) / 2));
4866+ direction = ImVec2(1.0f, 0.0f);
4867+ spring_max = ImVec2(rect_min.x + width, rect_max.y);
4868+ spacing_min = ImVec2(rect_min.x + width, rect_min.y);
4869+ }
4870+ else
4871+ {
4872+ spacing = floorf(item_spacing.y);
4873+ width = rect_size.y - spacing;
4874+ origin = ImVec2(floorf(rect_min.x + (rect_max.x - rect_min.x) / 2), floorf(rect_min.y));
4875+ direction = ImVec2(0.0f, 1.0f);
4876+ spring_max = ImVec2(rect_max.x, rect_min.y + width);
4877+ spacing_min = ImVec2(rect_min.x, rect_min.y + width);
4878+ }
4879+
4880+ if (spring_weight <= 0.0f && spacing <= 0.0f)
4881+ return;
4882+
4883+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
4884+
4885+ draw_list->PushClipRect(rect_min, rect_max, true);
4886+
4887+ draw_list->AddRectFilled(rect_min, spring_max, ImColor(80, 20, 80));
4888+ draw_list->AddRectFilled(spacing_min, rect_max, ImColor(80, 20, 20));
4889+
4890+ const float zig_zag_size = 3;
4891+ ImVec2 normal = ImVec2(-direction.y, direction.x);
4892+
4893+ draw_list->PathClear();
4894+ origin.x += 0.5f;
4895+ origin.y += 0.5f;
4896+ draw_list->PathLineTo(origin);
4897+ for (float x = zig_zag_size * 0.5f; x <= width; x += zig_zag_size)
4898+ {
4899+ ImVec2 p;
4900+ p.x = origin.x + direction.x * x + normal.x * zig_zag_size;
4901+ p.y = origin.y + direction.y * x + normal.y * zig_zag_size;
4902+ draw_list->PathLineTo(p);
4903+ normal = ImVec2(-normal.x, -normal.y);
4904+ }
4905+ draw_list->PathStroke(ImColor(255, 255, 255, 190), false, 1.0f);
4906+
4907+ draw_list->PopClipRect();
4908+ }
4909+ };
4910+
4911+ ImGui::Checkbox("Widget A", &widget_a); ImGui::SameLine();
4912+ ImGui::Checkbox("Widget B", &widget_b); ImGui::SameLine();
4913+ ImGui::Checkbox("Widget C", &widget_c);
4914+ ImGui::Checkbox("Spring A", &spring_a); ImGui::SameLine();
4915+ ImGui::Checkbox("Spring AB", &spring_ab); ImGui::SameLine();
4916+ ImGui::Checkbox("Spring BC", &spring_bc); ImGui::SameLine();
4917+ ImGui::Checkbox("Spring C", &spring_c);
4918+ ImGui::Checkbox("Horizontal", &horizontal); ImGui::SameLine();
4919+ ImGui::Checkbox("Minimize Width", &minimize_width); ImGui::SameLine();
4920+ ImGui::Checkbox("Minimize Height", &minimize_height);
4921+ ImGui::Checkbox("Draw Springs", &draw_springs); ImGui::SameLine();
4922+ ImGui::TextUnformatted(" "); ImGui::SameLine();
4923+ ImGui::ColorButton("- Spring", ImColor(80, 20, 80), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
4924+ ImGui::TextUnformatted("Spring"); ImGui::SameLine();
4925+ ImGui::TextUnformatted(" "); ImGui::SameLine();
4926+ ImGui::ColorButton("- Spacing", ImColor(80, 20, 20), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
4927+ ImGui::TextUnformatted("Item Spacing");
4928+ ImGui::DragFloat("Item Spacing", horizontal ? &item_spacing.x : &item_spacing.y, 0.1f, 0.0f, 50.0f);
4929+ ImGui::DragFloat("A & C Spring Weight", &a_c_spring_weight, 0.002f, 0.0f, 1.0f);
4930+ ImGui::DragFloat("AB Spring Weight", &ab_spring_weight, 0.002f, 0.0f, 1.0f);
4931+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("BC Spring Weight = 1 - AB Spring Weight");
4932+ ImGui::DragFloat("Minor Axis Alignment", &alignment, 0.002f, 0.0f, 1.0f);
4933+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("This is vertical alignment for horizontal layouts and horizontal alignment for vertical layouts.");
4934+ ImGui::Text("Layout widgets:");
4935+ ImGui::Text("| Spring A | Widget A | Spring AB | Widget B | Spring BC | Widget C | Spring C |");
4936+
4937+ ImGui::Spacing();
4938+
4939+ ImVec2 widget_size;
4940+ widget_size.x = floorf(ImGui::GetContentRegionAvail().x / 4);
4941+ widget_size.y = horizontal ? floorf(widget_size.x / 3) : widget_size.x;
4942+
4943+ ImVec2 small_widget_size = widget_size;
4944+ if (horizontal)
4945+ small_widget_size.y = floorf(small_widget_size.y / 2);
4946+ else
4947+ small_widget_size.x = floorf(small_widget_size.x / 2);
4948+
4949+ ImVec2 layout_size = ImVec2(widget_size.x * 4, widget_size.y * 4);
4950+ if (minimize_width) layout_size.x = 0.0f;
4951+ if (minimize_height) layout_size.y = 0.0f;
4952+
4953+ // Minor axis alignment can be set by style or directly in BeginHorizontal/BeginVertical
4954+ // Example:
4955+ // ImGui::PushStyleVar(ImGuiStyleVar_LayoutAlign, alignment);
4956+
4957+ ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(floorf(item_spacing.x), floorf(item_spacing.y)));
4958+
4959+ if (horizontal) { ImGui::BeginHorizontal("h1", layout_size, alignment); } else { ImGui::BeginVertical("v1", layout_size, alignment); }
4960+ if (spring_a) { funcs::VisibleSpring(a_c_spring_weight); }
4961+ if (widget_a) { ImGui::Button("Widget A", widget_size); }
4962+ if (spring_ab) { funcs::VisibleSpring(ab_spring_weight); }
4963+ if (widget_b) { ImGui::Button("Widget B", small_widget_size); }
4964+ if (spring_bc) { funcs::VisibleSpring(1.0f - ab_spring_weight); }
4965+ if (widget_c) { ImGui::Button("Widget C", widget_size); }
4966+ if (spring_c) { funcs::VisibleSpring(a_c_spring_weight); }
4967+ if (horizontal) { ImGui::EndHorizontal(); } else { ImGui::EndVertical(); }
4968+
4969+ ImGui::PopStyleVar();
4970+
4971+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
4972+ draw_list->AddRect(ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), ImGui::GetColorU32(ImGuiCol_Border));
4973+
4974+ ImGui::TreePop();
4975+ }
4976+ #endif // IMGUI_HAS_STACK_LAYOUT
48274977}
48284978
48294979//-----------------------------------------------------------------------------
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