@@ -5222,6 +5222,156 @@ static void DemoWindowLayout()
52225222
52235223 ImGui::TreePop();
52245224 }
5225+
5226+ #if IMGUI_HAS_STACK_LAYOUT
5227+ IMGUI_DEMO_MARKER("Layout/Stack Layout");
5228+ if (ImGui::TreeNode("Stack Layout"))
5229+ {
5230+ static bool widget_a = true, widget_b = true, widget_c = true;
5231+ static bool spring_a = true, spring_ab = true, spring_bc = true, spring_c = true;
5232+ static bool minimize_width = false, minimize_height = true;
5233+ static bool horizontal = true, draw_springs = true;
5234+ static ImVec2 item_spacing = ImGui::GetStyle().ItemSpacing;
5235+ static float a_c_spring_weight = 0.0f;
5236+ static float ab_spring_weight = 0.5f;
5237+ static float alignment = 0.5f;
5238+
5239+ struct funcs
5240+ {
5241+ static void VisibleSpring(float spring_weight)
5242+ {
5243+ ImGui::Spring(spring_weight);
5244+ if (!draw_springs)
5245+ return;
5246+
5247+ ImVec2 rect_min = ImGui::GetItemRectMin();
5248+ ImVec2 rect_max = ImGui::GetItemRectMax();
5249+
5250+ ImVec2 rect_size = ImGui::GetItemRectSize();
5251+ if (rect_size.x <= 0.0f && rect_size.y <= 0.0f)
5252+ return;
5253+
5254+ // Draw zig-zag
5255+ float width = 0.0f, spacing = 0.0f;
5256+ ImVec2 direction, origin;
5257+ ImVec2 spacing_min, spring_max;
5258+
5259+ if (horizontal)
5260+ {
5261+ spacing = floorf(item_spacing.x);
5262+ width = rect_size.x - spacing;
5263+ origin = ImVec2(floorf(rect_min.x), floorf(rect_min.y + (rect_max.y - rect_min.y) / 2));
5264+ direction = ImVec2(1.0f, 0.0f);
5265+ spring_max = ImVec2(rect_min.x + width, rect_max.y);
5266+ spacing_min = ImVec2(rect_min.x + width, rect_min.y);
5267+ }
5268+ else
5269+ {
5270+ spacing = floorf(item_spacing.y);
5271+ width = rect_size.y - spacing;
5272+ origin = ImVec2(floorf(rect_min.x + (rect_max.x - rect_min.x) / 2), floorf(rect_min.y));
5273+ direction = ImVec2(0.0f, 1.0f);
5274+ spring_max = ImVec2(rect_max.x, rect_min.y + width);
5275+ spacing_min = ImVec2(rect_min.x, rect_min.y + width);
5276+ }
5277+
5278+ if (spring_weight <= 0.0f && spacing <= 0.0f)
5279+ return;
5280+
5281+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
5282+
5283+ draw_list->PushClipRect(rect_min, rect_max, true);
5284+
5285+ draw_list->AddRectFilled(rect_min, spring_max, ImColor(80, 20, 80));
5286+ draw_list->AddRectFilled(spacing_min, rect_max, ImColor(80, 20, 20));
5287+
5288+ const float zig_zag_size = 3;
5289+ ImVec2 normal = ImVec2(-direction.y, direction.x);
5290+
5291+ draw_list->PathClear();
5292+ origin.x += 0.5f;
5293+ origin.y += 0.5f;
5294+ draw_list->PathLineTo(origin);
5295+ for (float x = zig_zag_size * 0.5f; x <= width; x += zig_zag_size)
5296+ {
5297+ ImVec2 p;
5298+ p.x = origin.x + direction.x * x + normal.x * zig_zag_size;
5299+ p.y = origin.y + direction.y * x + normal.y * zig_zag_size;
5300+ draw_list->PathLineTo(p);
5301+ normal = ImVec2(-normal.x, -normal.y);
5302+ }
5303+ draw_list->PathStroke(ImColor(255, 255, 255, 190), false, 1.0f);
5304+
5305+ draw_list->PopClipRect();
5306+ }
5307+ };
5308+
5309+ ImGui::Checkbox("Widget A", &widget_a); ImGui::SameLine();
5310+ ImGui::Checkbox("Widget B", &widget_b); ImGui::SameLine();
5311+ ImGui::Checkbox("Widget C", &widget_c);
5312+ ImGui::Checkbox("Spring A", &spring_a); ImGui::SameLine();
5313+ ImGui::Checkbox("Spring AB", &spring_ab); ImGui::SameLine();
5314+ ImGui::Checkbox("Spring BC", &spring_bc); ImGui::SameLine();
5315+ ImGui::Checkbox("Spring C", &spring_c);
5316+ ImGui::Checkbox("Horizontal", &horizontal); ImGui::SameLine();
5317+ ImGui::Checkbox("Minimize Width", &minimize_width); ImGui::SameLine();
5318+ ImGui::Checkbox("Minimize Height", &minimize_height);
5319+ ImGui::Checkbox("Draw Springs", &draw_springs); ImGui::SameLine();
5320+ ImGui::TextUnformatted(" "); ImGui::SameLine();
5321+ ImGui::ColorButton("- Spring", ImColor(80, 20, 80), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
5322+ ImGui::TextUnformatted("Spring"); ImGui::SameLine();
5323+ ImGui::TextUnformatted(" "); ImGui::SameLine();
5324+ ImGui::ColorButton("- Spacing", ImColor(80, 20, 20), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
5325+ ImGui::TextUnformatted("Item Spacing");
5326+ ImGui::DragFloat("Item Spacing", horizontal ? &item_spacing.x : &item_spacing.y, 0.1f, 0.0f, 50.0f);
5327+ ImGui::DragFloat("A & C Spring Weight", &a_c_spring_weight, 0.002f, 0.0f, 1.0f);
5328+ ImGui::DragFloat("AB Spring Weight", &ab_spring_weight, 0.002f, 0.0f, 1.0f);
5329+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("BC Spring Weight = 1 - AB Spring Weight");
5330+ ImGui::DragFloat("Minor Axis Alignment", &alignment, 0.002f, 0.0f, 1.0f);
5331+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("This is vertical alignment for horizontal layouts and horizontal alignment for vertical layouts.");
5332+ ImGui::Text("Layout widgets:");
5333+ ImGui::Text("| Spring A | Widget A | Spring AB | Widget B | Spring BC | Widget C | Spring C |");
5334+
5335+ ImGui::Spacing();
5336+
5337+ ImVec2 widget_size;
5338+ widget_size.x = floorf(ImGui::GetContentRegionAvail().x / 4);
5339+ widget_size.y = horizontal ? floorf(widget_size.x / 3) : widget_size.x;
5340+
5341+ ImVec2 small_widget_size = widget_size;
5342+ if (horizontal)
5343+ small_widget_size.y = floorf(small_widget_size.y / 2);
5344+ else
5345+ small_widget_size.x = floorf(small_widget_size.x / 2);
5346+
5347+ ImVec2 layout_size = ImVec2(widget_size.x * 4, widget_size.y * 4);
5348+ if (minimize_width) layout_size.x = 0.0f;
5349+ if (minimize_height) layout_size.y = 0.0f;
5350+
5351+ // Minor axis alignment can be set by style or directly in BeginHorizontal/BeginVertical
5352+ // Example:
5353+ // ImGui::PushStyleVar(ImGuiStyleVar_LayoutAlign, alignment);
5354+
5355+ ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(floorf(item_spacing.x), floorf(item_spacing.y)));
5356+
5357+ if (horizontal) { ImGui::BeginHorizontal("h1", layout_size, alignment); } else { ImGui::BeginVertical("v1", layout_size, alignment); }
5358+ if (spring_a) { funcs::VisibleSpring(a_c_spring_weight); }
5359+ if (widget_a) { ImGui::Button("Widget A", widget_size); }
5360+ if (spring_ab) { funcs::VisibleSpring(ab_spring_weight); }
5361+ if (widget_b) { ImGui::Button("Widget B", small_widget_size); }
5362+ if (spring_bc) { funcs::VisibleSpring(1.0f - ab_spring_weight); }
5363+ if (widget_c) { ImGui::Button("Widget C", widget_size); }
5364+ if (spring_c) { funcs::VisibleSpring(a_c_spring_weight); }
5365+ if (horizontal) { ImGui::EndHorizontal(); } else { ImGui::EndVertical(); }
5366+
5367+ ImGui::PopStyleVar();
5368+
5369+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
5370+ draw_list->AddRect(ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), ImGui::GetColorU32(ImGuiCol_Border));
5371+
5372+ ImGui::TreePop();
5373+ }
5374+ #endif // IMGUI_HAS_STACK_LAYOUT
52255375}
52265376
52275377//-----------------------------------------------------------------------------
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