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MultiSelect: Box-Select +Tables: fix usage of box-selection columns with items straying out of columns. (#7994, #2221)

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Use 00d3f9295e.
+ Assets Browser toggle to enable ScrollX.
This commit is contained in:
ocornut
2026-04-20 11:07:45 +02:00
parent ea1c04f7ab
commit ac88294b4a
3 changed files with 19 additions and 5 deletions
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imgui_demo.cpp
+8 -3
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@@ -10726,8 +10726,9 @@ struct ExampleAssetsBrowser
bool AllowDragUnselected = false; // Will set ImGuiMultiSelectFlags_SelectOnClickRelease
float IconSize = 0;
int IconSpacing = 10;
int IconHitSpacing = 4; // Increase hit-spacing if you want to make it possible to clear or box-select from gaps. Some spacing is required to able to amend with Shift+box-select. Value is small in Explorer.
int IconHitSpacing = 4; // Increase hit-spacing if you want to make it possible to clear or box-select from gaps. Some spacing is required to able to amend with Shift+box-select. Value is small in Explorer.
bool StretchSpacing = true;
bool UseScrollX = false; // Debug: submit twice the number of items per line (overflow horizontally to exercise ScrollX + box-select)
// State
ImVector<ExampleAsset> Items; // Our items
@@ -10778,12 +10779,15 @@ struct ExampleAssetsBrowser
// Layout: calculate number of icon per line and number of lines
LayoutItemSize = ImVec2(floorf(IconSize), floorf(IconSize));
LayoutColumnCount = IM_MAX((int)(avail_width / (LayoutItemSize.x + LayoutItemSpacing)), 1);
LayoutLineCount = (Items.Size + LayoutColumnCount - 1) / LayoutColumnCount;
// Layout: when stretching: allocate remaining space to more spacing. Round before division, so item_spacing may be non-integer.
if (StretchSpacing && LayoutColumnCount > 1)
LayoutItemSpacing = floorf(avail_width - LayoutItemSize.x * LayoutColumnCount) / LayoutColumnCount;
if (UseScrollX)
LayoutColumnCount *= 2;
LayoutLineCount = (Items.Size + LayoutColumnCount - 1) / LayoutColumnCount;
LayoutItemStep = ImVec2(LayoutItemSize.x + LayoutItemSpacing, LayoutItemSize.y + LayoutItemSpacing);
LayoutSelectableSpacing = IM_MAX(floorf(LayoutItemSpacing) - IconHitSpacing, 0.0f);
LayoutOuterPadding = floorf(LayoutItemSpacing * 0.5f);
@@ -10843,6 +10847,7 @@ struct ExampleAssetsBrowser
ImGui::SliderInt("Icon Spacing", &IconSpacing, 0, 32);
ImGui::SliderInt("Icon Hit Spacing", &IconHitSpacing, 0, 32);
ImGui::Checkbox("Stretch Spacing", &StretchSpacing);
ImGui::Checkbox("Use ScrollX", &UseScrollX);
ImGui::PopItemWidth();
ImGui::EndMenu();
}
@@ -10872,7 +10877,7 @@ struct ExampleAssetsBrowser
ImGuiIO& io = ImGui::GetIO();
ImGui::SetNextWindowContentSize(ImVec2(0.0f, LayoutOuterPadding + LayoutLineCount * (LayoutItemSize.y + LayoutItemSpacing)));
if (ImGui::BeginChild("Assets", ImVec2(0.0f, -ImGui::GetTextLineHeightWithSpacing()), ImGuiChildFlags_Borders, ImGuiWindowFlags_NoMove))
if (ImGui::BeginChild("Assets", ImVec2(0.0f, -ImGui::GetTextLineHeightWithSpacing()), ImGuiChildFlags_Borders, ImGuiWindowFlags_NoMove | ImGuiWindowFlags_HorizontalScrollbar))
{
ImDrawList* draw_list = ImGui::GetWindowDrawList();