@@ -5186,6 +5186,156 @@ static void DemoWindowLayout()
51865186
51875187 ImGui::TreePop();
51885188 }
5189+
5190+ #if IMGUI_HAS_STACK_LAYOUT
5191+ IMGUI_DEMO_MARKER("Layout/Stack Layout");
5192+ if (ImGui::TreeNode("Stack Layout"))
5193+ {
5194+ static bool widget_a = true, widget_b = true, widget_c = true;
5195+ static bool spring_a = true, spring_ab = true, spring_bc = true, spring_c = true;
5196+ static bool minimize_width = false, minimize_height = true;
5197+ static bool horizontal = true, draw_springs = true;
5198+ static ImVec2 item_spacing = ImGui::GetStyle().ItemSpacing;
5199+ static float a_c_spring_weight = 0.0f;
5200+ static float ab_spring_weight = 0.5f;
5201+ static float alignment = 0.5f;
5202+
5203+ struct funcs
5204+ {
5205+ static void VisibleSpring(float spring_weight)
5206+ {
5207+ ImGui::Spring(spring_weight);
5208+ if (!draw_springs)
5209+ return;
5210+
5211+ ImVec2 rect_min = ImGui::GetItemRectMin();
5212+ ImVec2 rect_max = ImGui::GetItemRectMax();
5213+
5214+ ImVec2 rect_size = ImGui::GetItemRectSize();
5215+ if (rect_size.x <= 0.0f && rect_size.y <= 0.0f)
5216+ return;
5217+
5218+ // Draw zig-zag
5219+ float width = 0.0f, spacing = 0.0f;
5220+ ImVec2 direction, origin;
5221+ ImVec2 spacing_min, spring_max;
5222+
5223+ if (horizontal)
5224+ {
5225+ spacing = floorf(item_spacing.x);
5226+ width = rect_size.x - spacing;
5227+ origin = ImVec2(floorf(rect_min.x), floorf(rect_min.y + (rect_max.y - rect_min.y) / 2));
5228+ direction = ImVec2(1.0f, 0.0f);
5229+ spring_max = ImVec2(rect_min.x + width, rect_max.y);
5230+ spacing_min = ImVec2(rect_min.x + width, rect_min.y);
5231+ }
5232+ else
5233+ {
5234+ spacing = floorf(item_spacing.y);
5235+ width = rect_size.y - spacing;
5236+ origin = ImVec2(floorf(rect_min.x + (rect_max.x - rect_min.x) / 2), floorf(rect_min.y));
5237+ direction = ImVec2(0.0f, 1.0f);
5238+ spring_max = ImVec2(rect_max.x, rect_min.y + width);
5239+ spacing_min = ImVec2(rect_min.x, rect_min.y + width);
5240+ }
5241+
5242+ if (spring_weight <= 0.0f && spacing <= 0.0f)
5243+ return;
5244+
5245+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
5246+
5247+ draw_list->PushClipRect(rect_min, rect_max, true);
5248+
5249+ draw_list->AddRectFilled(rect_min, spring_max, ImColor(80, 20, 80));
5250+ draw_list->AddRectFilled(spacing_min, rect_max, ImColor(80, 20, 20));
5251+
5252+ const float zig_zag_size = 3;
5253+ ImVec2 normal = ImVec2(-direction.y, direction.x);
5254+
5255+ draw_list->PathClear();
5256+ origin.x += 0.5f;
5257+ origin.y += 0.5f;
5258+ draw_list->PathLineTo(origin);
5259+ for (float x = zig_zag_size * 0.5f; x <= width; x += zig_zag_size)
5260+ {
5261+ ImVec2 p;
5262+ p.x = origin.x + direction.x * x + normal.x * zig_zag_size;
5263+ p.y = origin.y + direction.y * x + normal.y * zig_zag_size;
5264+ draw_list->PathLineTo(p);
5265+ normal = ImVec2(-normal.x, -normal.y);
5266+ }
5267+ draw_list->PathStroke(ImColor(255, 255, 255, 190), false, 1.0f);
5268+
5269+ draw_list->PopClipRect();
5270+ }
5271+ };
5272+
5273+ ImGui::Checkbox("Widget A", &widget_a); ImGui::SameLine();
5274+ ImGui::Checkbox("Widget B", &widget_b); ImGui::SameLine();
5275+ ImGui::Checkbox("Widget C", &widget_c);
5276+ ImGui::Checkbox("Spring A", &spring_a); ImGui::SameLine();
5277+ ImGui::Checkbox("Spring AB", &spring_ab); ImGui::SameLine();
5278+ ImGui::Checkbox("Spring BC", &spring_bc); ImGui::SameLine();
5279+ ImGui::Checkbox("Spring C", &spring_c);
5280+ ImGui::Checkbox("Horizontal", &horizontal); ImGui::SameLine();
5281+ ImGui::Checkbox("Minimize Width", &minimize_width); ImGui::SameLine();
5282+ ImGui::Checkbox("Minimize Height", &minimize_height);
5283+ ImGui::Checkbox("Draw Springs", &draw_springs); ImGui::SameLine();
5284+ ImGui::TextUnformatted(" "); ImGui::SameLine();
5285+ ImGui::ColorButton("- Spring", ImColor(80, 20, 80), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
5286+ ImGui::TextUnformatted("Spring"); ImGui::SameLine();
5287+ ImGui::TextUnformatted(" "); ImGui::SameLine();
5288+ ImGui::ColorButton("- Spacing", ImColor(80, 20, 20), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
5289+ ImGui::TextUnformatted("Item Spacing");
5290+ ImGui::DragFloat("Item Spacing", horizontal ? &item_spacing.x : &item_spacing.y, 0.1f, 0.0f, 50.0f);
5291+ ImGui::DragFloat("A & C Spring Weight", &a_c_spring_weight, 0.002f, 0.0f, 1.0f);
5292+ ImGui::DragFloat("AB Spring Weight", &ab_spring_weight, 0.002f, 0.0f, 1.0f);
5293+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("BC Spring Weight = 1 - AB Spring Weight");
5294+ ImGui::DragFloat("Minor Axis Alignment", &alignment, 0.002f, 0.0f, 1.0f);
5295+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("This is vertical alignment for horizontal layouts and horizontal alignment for vertical layouts.");
5296+ ImGui::Text("Layout widgets:");
5297+ ImGui::Text("| Spring A | Widget A | Spring AB | Widget B | Spring BC | Widget C | Spring C |");
5298+
5299+ ImGui::Spacing();
5300+
5301+ ImVec2 widget_size;
5302+ widget_size.x = floorf(ImGui::GetContentRegionAvail().x / 4);
5303+ widget_size.y = horizontal ? floorf(widget_size.x / 3) : widget_size.x;
5304+
5305+ ImVec2 small_widget_size = widget_size;
5306+ if (horizontal)
5307+ small_widget_size.y = floorf(small_widget_size.y / 2);
5308+ else
5309+ small_widget_size.x = floorf(small_widget_size.x / 2);
5310+
5311+ ImVec2 layout_size = ImVec2(widget_size.x * 4, widget_size.y * 4);
5312+ if (minimize_width) layout_size.x = 0.0f;
5313+ if (minimize_height) layout_size.y = 0.0f;
5314+
5315+ // Minor axis alignment can be set by style or directly in BeginHorizontal/BeginVertical
5316+ // Example:
5317+ // ImGui::PushStyleVar(ImGuiStyleVar_LayoutAlign, alignment);
5318+
5319+ ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(floorf(item_spacing.x), floorf(item_spacing.y)));
5320+
5321+ if (horizontal) { ImGui::BeginHorizontal("h1", layout_size, alignment); } else { ImGui::BeginVertical("v1", layout_size, alignment); }
5322+ if (spring_a) { funcs::VisibleSpring(a_c_spring_weight); }
5323+ if (widget_a) { ImGui::Button("Widget A", widget_size); }
5324+ if (spring_ab) { funcs::VisibleSpring(ab_spring_weight); }
5325+ if (widget_b) { ImGui::Button("Widget B", small_widget_size); }
5326+ if (spring_bc) { funcs::VisibleSpring(1.0f - ab_spring_weight); }
5327+ if (widget_c) { ImGui::Button("Widget C", widget_size); }
5328+ if (spring_c) { funcs::VisibleSpring(a_c_spring_weight); }
5329+ if (horizontal) { ImGui::EndHorizontal(); } else { ImGui::EndVertical(); }
5330+
5331+ ImGui::PopStyleVar();
5332+
5333+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
5334+ draw_list->AddRect(ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), ImGui::GetColorU32(ImGuiCol_Border));
5335+
5336+ ImGui::TreePop();
5337+ }
5338+ #endif // IMGUI_HAS_STACK_LAYOUT
51895339}
51905340
51915341//-----------------------------------------------------------------------------
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