@@ -4480,6 +4480,156 @@ static void ShowDemoWindowLayout()
44804480
44814481 ImGui::TreePop();
44824482 }
4483+
4484+ #if IMGUI_HAS_STACK_LAYOUT
4485+ IMGUI_DEMO_MARKER("Layout/Stack Layout");
4486+ if (ImGui::TreeNode("Stack Layout"))
4487+ {
4488+ static bool widget_a = true, widget_b = true, widget_c = true;
4489+ static bool spring_a = true, spring_ab = true, spring_bc = true, spring_c = true;
4490+ static bool minimize_width = false, minimize_height = true;
4491+ static bool horizontal = true, draw_springs = true;
4492+ static ImVec2 item_spacing = ImGui::GetStyle().ItemSpacing;
4493+ static float a_c_spring_weight = 0.0f;
4494+ static float ab_spring_weight = 0.5f;
4495+ static float alignment = 0.5f;
4496+
4497+ struct funcs
4498+ {
4499+ static void VisibleSpring(float spring_weight)
4500+ {
4501+ ImGui::Spring(spring_weight);
4502+ if (!draw_springs)
4503+ return;
4504+
4505+ ImVec2 rect_min = ImGui::GetItemRectMin();
4506+ ImVec2 rect_max = ImGui::GetItemRectMax();
4507+
4508+ ImVec2 rect_size = ImGui::GetItemRectSize();
4509+ if (rect_size.x <= 0.0f && rect_size.y <= 0.0f)
4510+ return;
4511+
4512+ // Draw zig-zag
4513+ float width = 0.0f, spacing = 0.0f;
4514+ ImVec2 direction, origin;
4515+ ImVec2 spacing_min, spring_max;
4516+
4517+ if (horizontal)
4518+ {
4519+ spacing = floorf(item_spacing.x);
4520+ width = rect_size.x - spacing;
4521+ origin = ImVec2(floorf(rect_min.x), floorf(rect_min.y + (rect_max.y - rect_min.y) / 2));
4522+ direction = ImVec2(1.0f, 0.0f);
4523+ spring_max = ImVec2(rect_min.x + width, rect_max.y);
4524+ spacing_min = ImVec2(rect_min.x + width, rect_min.y);
4525+ }
4526+ else
4527+ {
4528+ spacing = floorf(item_spacing.y);
4529+ width = rect_size.y - spacing;
4530+ origin = ImVec2(floorf(rect_min.x + (rect_max.x - rect_min.x) / 2), floorf(rect_min.y));
4531+ direction = ImVec2(0.0f, 1.0f);
4532+ spring_max = ImVec2(rect_max.x, rect_min.y + width);
4533+ spacing_min = ImVec2(rect_min.x, rect_min.y + width);
4534+ }
4535+
4536+ if (spring_weight <= 0.0f && spacing <= 0.0f)
4537+ return;
4538+
4539+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
4540+
4541+ draw_list->PushClipRect(rect_min, rect_max, true);
4542+
4543+ draw_list->AddRectFilled(rect_min, spring_max, ImColor(80, 20, 80));
4544+ draw_list->AddRectFilled(spacing_min, rect_max, ImColor(80, 20, 20));
4545+
4546+ const float zig_zag_size = 3;
4547+ ImVec2 normal = ImVec2(-direction.y, direction.x);
4548+
4549+ draw_list->PathClear();
4550+ origin.x += 0.5f;
4551+ origin.y += 0.5f;
4552+ draw_list->PathLineTo(origin);
4553+ for (float x = zig_zag_size * 0.5f; x <= width; x += zig_zag_size)
4554+ {
4555+ ImVec2 p;
4556+ p.x = origin.x + direction.x * x + normal.x * zig_zag_size;
4557+ p.y = origin.y + direction.y * x + normal.y * zig_zag_size;
4558+ draw_list->PathLineTo(p);
4559+ normal = ImVec2(-normal.x, -normal.y);
4560+ }
4561+ draw_list->PathStroke(ImColor(255, 255, 255, 190), false, 1.0f);
4562+
4563+ draw_list->PopClipRect();
4564+ }
4565+ };
4566+
4567+ ImGui::Checkbox("Widget A", &widget_a); ImGui::SameLine();
4568+ ImGui::Checkbox("Widget B", &widget_b); ImGui::SameLine();
4569+ ImGui::Checkbox("Widget C", &widget_c);
4570+ ImGui::Checkbox("Spring A", &spring_a); ImGui::SameLine();
4571+ ImGui::Checkbox("Spring AB", &spring_ab); ImGui::SameLine();
4572+ ImGui::Checkbox("Spring BC", &spring_bc); ImGui::SameLine();
4573+ ImGui::Checkbox("Spring C", &spring_c);
4574+ ImGui::Checkbox("Horizontal", &horizontal); ImGui::SameLine();
4575+ ImGui::Checkbox("Minimize Width", &minimize_width); ImGui::SameLine();
4576+ ImGui::Checkbox("Minimize Height", &minimize_height);
4577+ ImGui::Checkbox("Draw Springs", &draw_springs); ImGui::SameLine();
4578+ ImGui::TextUnformatted(" "); ImGui::SameLine();
4579+ ImGui::ColorButton("- Spring", ImColor(80, 20, 80), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
4580+ ImGui::TextUnformatted("Spring"); ImGui::SameLine();
4581+ ImGui::TextUnformatted(" "); ImGui::SameLine();
4582+ ImGui::ColorButton("- Spacing", ImColor(80, 20, 20), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
4583+ ImGui::TextUnformatted("Item Spacing");
4584+ ImGui::DragFloat("Item Spacing", horizontal ? &item_spacing.x : &item_spacing.y, 0.1f, 0.0f, 50.0f);
4585+ ImGui::DragFloat("A & C Spring Weight", &a_c_spring_weight, 0.002f, 0.0f, 1.0f);
4586+ ImGui::DragFloat("AB Spring Weight", &ab_spring_weight, 0.002f, 0.0f, 1.0f);
4587+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("BC Spring Weight = 1 - AB Spring Weight");
4588+ ImGui::DragFloat("Minor Axis Alignment", &alignment, 0.002f, 0.0f, 1.0f);
4589+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("This is vertical alignment for horizontal layouts and horizontal alignment for vertical layouts.");
4590+ ImGui::Text("Layout widgets:");
4591+ ImGui::Text("| Spring A | Widget A | Spring AB | Widget B | Spring BC | Widget C | Spring C |");
4592+
4593+ ImGui::Spacing();
4594+
4595+ ImVec2 widget_size;
4596+ widget_size.x = floorf(ImGui::GetContentRegionAvail().x / 4);
4597+ widget_size.y = horizontal ? floorf(widget_size.x / 3) : widget_size.x;
4598+
4599+ ImVec2 small_widget_size = widget_size;
4600+ if (horizontal)
4601+ small_widget_size.y = floorf(small_widget_size.y / 2);
4602+ else
4603+ small_widget_size.x = floorf(small_widget_size.x / 2);
4604+
4605+ ImVec2 layout_size = ImVec2(widget_size.x * 4, widget_size.y * 4);
4606+ if (minimize_width) layout_size.x = 0.0f;
4607+ if (minimize_height) layout_size.y = 0.0f;
4608+
4609+ // Minor axis alignment can be set by style or directly in BeginHorizontal/BeginVertical
4610+ // Example:
4611+ // ImGui::PushStyleVar(ImGuiStyleVar_LayoutAlign, alignment);
4612+
4613+ ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(floorf(item_spacing.x), floorf(item_spacing.y)));
4614+
4615+ if (horizontal) { ImGui::BeginHorizontal("h1", layout_size, alignment); } else { ImGui::BeginVertical("v1", layout_size, alignment); }
4616+ if (spring_a) { funcs::VisibleSpring(a_c_spring_weight); }
4617+ if (widget_a) { ImGui::Button("Widget A", widget_size); }
4618+ if (spring_ab) { funcs::VisibleSpring(ab_spring_weight); }
4619+ if (widget_b) { ImGui::Button("Widget B", small_widget_size); }
4620+ if (spring_bc) { funcs::VisibleSpring(1.0f - ab_spring_weight); }
4621+ if (widget_c) { ImGui::Button("Widget C", widget_size); }
4622+ if (spring_c) { funcs::VisibleSpring(a_c_spring_weight); }
4623+ if (horizontal) { ImGui::EndHorizontal(); } else { ImGui::EndVertical(); }
4624+
4625+ ImGui::PopStyleVar();
4626+
4627+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
4628+ draw_list->AddRect(ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), ImGui::GetColorU32(ImGuiCol_Border));
4629+
4630+ ImGui::TreePop();
4631+ }
4632+ #endif // IMGUI_HAS_STACK_LAYOUT
44834633}
44844634
44854635//-----------------------------------------------------------------------------
0 commit comments