@@ -5286,6 +5286,156 @@ static void DemoWindowLayout()
52865286
52875287 ImGui::TreePop();
52885288 }
5289+
5290+ #if IMGUI_HAS_STACK_LAYOUT
5291+ IMGUI_DEMO_MARKER("Layout/Stack Layout");
5292+ if (ImGui::TreeNode("Stack Layout"))
5293+ {
5294+ static bool widget_a = true, widget_b = true, widget_c = true;
5295+ static bool spring_a = true, spring_ab = true, spring_bc = true, spring_c = true;
5296+ static bool minimize_width = false, minimize_height = true;
5297+ static bool horizontal = true, draw_springs = true;
5298+ static ImVec2 item_spacing = ImGui::GetStyle().ItemSpacing;
5299+ static float a_c_spring_weight = 0.0f;
5300+ static float ab_spring_weight = 0.5f;
5301+ static float alignment = 0.5f;
5302+
5303+ struct funcs
5304+ {
5305+ static void VisibleSpring(float spring_weight)
5306+ {
5307+ ImGui::Spring(spring_weight);
5308+ if (!draw_springs)
5309+ return;
5310+
5311+ ImVec2 rect_min = ImGui::GetItemRectMin();
5312+ ImVec2 rect_max = ImGui::GetItemRectMax();
5313+
5314+ ImVec2 rect_size = ImGui::GetItemRectSize();
5315+ if (rect_size.x <= 0.0f && rect_size.y <= 0.0f)
5316+ return;
5317+
5318+ // Draw zig-zag
5319+ float width = 0.0f, spacing = 0.0f;
5320+ ImVec2 direction, origin;
5321+ ImVec2 spacing_min, spring_max;
5322+
5323+ if (horizontal)
5324+ {
5325+ spacing = floorf(item_spacing.x);
5326+ width = rect_size.x - spacing;
5327+ origin = ImVec2(floorf(rect_min.x), floorf(rect_min.y + (rect_max.y - rect_min.y) / 2));
5328+ direction = ImVec2(1.0f, 0.0f);
5329+ spring_max = ImVec2(rect_min.x + width, rect_max.y);
5330+ spacing_min = ImVec2(rect_min.x + width, rect_min.y);
5331+ }
5332+ else
5333+ {
5334+ spacing = floorf(item_spacing.y);
5335+ width = rect_size.y - spacing;
5336+ origin = ImVec2(floorf(rect_min.x + (rect_max.x - rect_min.x) / 2), floorf(rect_min.y));
5337+ direction = ImVec2(0.0f, 1.0f);
5338+ spring_max = ImVec2(rect_max.x, rect_min.y + width);
5339+ spacing_min = ImVec2(rect_min.x, rect_min.y + width);
5340+ }
5341+
5342+ if (spring_weight <= 0.0f && spacing <= 0.0f)
5343+ return;
5344+
5345+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
5346+
5347+ draw_list->PushClipRect(rect_min, rect_max, true);
5348+
5349+ draw_list->AddRectFilled(rect_min, spring_max, ImColor(80, 20, 80));
5350+ draw_list->AddRectFilled(spacing_min, rect_max, ImColor(80, 20, 20));
5351+
5352+ const float zig_zag_size = 3;
5353+ ImVec2 normal = ImVec2(-direction.y, direction.x);
5354+
5355+ draw_list->PathClear();
5356+ origin.x += 0.5f;
5357+ origin.y += 0.5f;
5358+ draw_list->PathLineTo(origin);
5359+ for (float x = zig_zag_size * 0.5f; x <= width; x += zig_zag_size)
5360+ {
5361+ ImVec2 p;
5362+ p.x = origin.x + direction.x * x + normal.x * zig_zag_size;
5363+ p.y = origin.y + direction.y * x + normal.y * zig_zag_size;
5364+ draw_list->PathLineTo(p);
5365+ normal = ImVec2(-normal.x, -normal.y);
5366+ }
5367+ draw_list->PathStroke(ImColor(255, 255, 255, 190), false, 1.0f);
5368+
5369+ draw_list->PopClipRect();
5370+ }
5371+ };
5372+
5373+ ImGui::Checkbox("Widget A", &widget_a); ImGui::SameLine();
5374+ ImGui::Checkbox("Widget B", &widget_b); ImGui::SameLine();
5375+ ImGui::Checkbox("Widget C", &widget_c);
5376+ ImGui::Checkbox("Spring A", &spring_a); ImGui::SameLine();
5377+ ImGui::Checkbox("Spring AB", &spring_ab); ImGui::SameLine();
5378+ ImGui::Checkbox("Spring BC", &spring_bc); ImGui::SameLine();
5379+ ImGui::Checkbox("Spring C", &spring_c);
5380+ ImGui::Checkbox("Horizontal", &horizontal); ImGui::SameLine();
5381+ ImGui::Checkbox("Minimize Width", &minimize_width); ImGui::SameLine();
5382+ ImGui::Checkbox("Minimize Height", &minimize_height);
5383+ ImGui::Checkbox("Draw Springs", &draw_springs); ImGui::SameLine();
5384+ ImGui::TextUnformatted(" "); ImGui::SameLine();
5385+ ImGui::ColorButton("- Spring", ImColor(80, 20, 80), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
5386+ ImGui::TextUnformatted("Spring"); ImGui::SameLine();
5387+ ImGui::TextUnformatted(" "); ImGui::SameLine();
5388+ ImGui::ColorButton("- Spacing", ImColor(80, 20, 20), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
5389+ ImGui::TextUnformatted("Item Spacing");
5390+ ImGui::DragFloat("Item Spacing", horizontal ? &item_spacing.x : &item_spacing.y, 0.1f, 0.0f, 50.0f);
5391+ ImGui::DragFloat("A & C Spring Weight", &a_c_spring_weight, 0.002f, 0.0f, 1.0f);
5392+ ImGui::DragFloat("AB Spring Weight", &ab_spring_weight, 0.002f, 0.0f, 1.0f);
5393+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("BC Spring Weight = 1 - AB Spring Weight");
5394+ ImGui::DragFloat("Minor Axis Alignment", &alignment, 0.002f, 0.0f, 1.0f);
5395+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("This is vertical alignment for horizontal layouts and horizontal alignment for vertical layouts.");
5396+ ImGui::Text("Layout widgets:");
5397+ ImGui::Text("| Spring A | Widget A | Spring AB | Widget B | Spring BC | Widget C | Spring C |");
5398+
5399+ ImGui::Spacing();
5400+
5401+ ImVec2 widget_size;
5402+ widget_size.x = floorf(ImGui::GetContentRegionAvail().x / 4);
5403+ widget_size.y = horizontal ? floorf(widget_size.x / 3) : widget_size.x;
5404+
5405+ ImVec2 small_widget_size = widget_size;
5406+ if (horizontal)
5407+ small_widget_size.y = floorf(small_widget_size.y / 2);
5408+ else
5409+ small_widget_size.x = floorf(small_widget_size.x / 2);
5410+
5411+ ImVec2 layout_size = ImVec2(widget_size.x * 4, widget_size.y * 4);
5412+ if (minimize_width) layout_size.x = 0.0f;
5413+ if (minimize_height) layout_size.y = 0.0f;
5414+
5415+ // Minor axis alignment can be set by style or directly in BeginHorizontal/BeginVertical
5416+ // Example:
5417+ // ImGui::PushStyleVar(ImGuiStyleVar_LayoutAlign, alignment);
5418+
5419+ ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(floorf(item_spacing.x), floorf(item_spacing.y)));
5420+
5421+ if (horizontal) { ImGui::BeginHorizontal("h1", layout_size, alignment); } else { ImGui::BeginVertical("v1", layout_size, alignment); }
5422+ if (spring_a) { funcs::VisibleSpring(a_c_spring_weight); }
5423+ if (widget_a) { ImGui::Button("Widget A", widget_size); }
5424+ if (spring_ab) { funcs::VisibleSpring(ab_spring_weight); }
5425+ if (widget_b) { ImGui::Button("Widget B", small_widget_size); }
5426+ if (spring_bc) { funcs::VisibleSpring(1.0f - ab_spring_weight); }
5427+ if (widget_c) { ImGui::Button("Widget C", widget_size); }
5428+ if (spring_c) { funcs::VisibleSpring(a_c_spring_weight); }
5429+ if (horizontal) { ImGui::EndHorizontal(); } else { ImGui::EndVertical(); }
5430+
5431+ ImGui::PopStyleVar();
5432+
5433+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
5434+ draw_list->AddRect(ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), ImGui::GetColorU32(ImGuiCol_Border));
5435+
5436+ ImGui::TreePop();
5437+ }
5438+ #endif // IMGUI_HAS_STACK_LAYOUT
52895439}
52905440
52915441//-----------------------------------------------------------------------------
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