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MultiSelect: made SetNextItemSelectionData() optional to allow disjoint selection (e.g. with a CollapsingHeader between items). Amend demo.

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ocornut 2023-05-20 15:51:39 +02:00
parent 815c61b82e
commit d2f208a30c
3 changed files with 29 additions and 22 deletions
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40
imgui_demo.cpp
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@ -2830,6 +2830,7 @@ static void ShowDemoWindowMultiSelect()
ImGui::TreePop();
}
// Demonstrate implementation a most-basic form of multi-selection manually
IMGUI_DEMO_MARKER("Widgets/Selection State/Multiple Selection (simplfied, manual)");
if (ImGui::TreeNode("Multiple Selection (simplified, manual)"))
{
@ -2841,9 +2842,9 @@ static void ShowDemoWindowMultiSelect()
sprintf(buf, "Object %d", n);
if (ImGui::Selectable(buf, selection[n]))
{
if (!ImGui::GetIO().KeyCtrl) // Clear selection when CTRL is not held
if (!ImGui::GetIO().KeyCtrl) // Clear selection when CTRL is not held
memset(selection, 0, sizeof(selection));
selection[n] ^= 1;
selection[n] ^= 1; // Toggle current item
}
}
ImGui::TreePop();
@ -2883,7 +2884,6 @@ static void ShowDemoWindowMultiSelect()
{
char label[64];
sprintf(label, "Object %05d: %s", n, random_names[n % IM_ARRAYSIZE(random_names)]);
bool item_is_selected = selection.GetSelected(n);
ImGui::SetNextItemSelectionUserData(n);
ImGui::Selectable(label, item_is_selected);
@ -2916,28 +2916,36 @@ static void ShowDemoWindowMultiSelect()
enum WidgetType { WidgetType_Selectable, WidgetType_TreeNode };
static bool use_table = false;
static bool use_drag_drop = true;
static bool multiple_selection_scopes = false;
static bool use_multiple_scopes = false;
static ImGuiMultiSelectFlags flags = ImGuiMultiSelectFlags_None;
static WidgetType widget_type = WidgetType_TreeNode;
if (ImGui::RadioButton("Selectables", widget_type == WidgetType_Selectable)) { widget_type = WidgetType_Selectable; }
ImGui::SameLine();
if (ImGui::RadioButton("Tree nodes", widget_type == WidgetType_TreeNode)) { widget_type = WidgetType_TreeNode; }
ImGui::Checkbox("Use table", &use_table);
ImGui::Checkbox("Use drag & drop", &use_drag_drop);
ImGui::Checkbox("Distinct selection scopes in same window", &multiple_selection_scopes);
ImGui::Checkbox("Multiple selection scopes in same window", &use_multiple_scopes);
ImGui::CheckboxFlags("ImGuiMultiSelectFlags_NoMultiSelect", &flags, ImGuiMultiSelectFlags_NoMultiSelect);
ImGui::CheckboxFlags("ImGuiMultiSelectFlags_NoUnselect", &flags, ImGuiMultiSelectFlags_NoUnselect);
ImGui::CheckboxFlags("ImGuiMultiSelectFlags_NoSelectAll", &flags, ImGuiMultiSelectFlags_NoSelectAll);
ImGui::CheckboxFlags("ImGuiMultiSelectFlags_ClearOnEscape", &flags, ImGuiMultiSelectFlags_ClearOnEscape);
ImGui::BeginDisabled(use_multiple_scopes);
ImGui::CheckboxFlags("ImGuiMultiSelectFlags_ClearOnClickWindowVoid", &flags, ImGuiMultiSelectFlags_ClearOnClickWindowVoid);
ImGui::EndDisabled();
// When 'multiple_selection_scopes' is set we show 3 selection scopes in the host window instead of 1 in a scrolling window.
// When 'use_multiple_scopes' is set we show 3 selection scopes in the host window instead of 1 in a scrolling window.
static ExampleSelection selections_data[3];
const int selection_scope_count = multiple_selection_scopes ? 3 : 1;
const int selection_scope_count = use_multiple_scopes ? 3 : 1;
for (int selection_scope_n = 0; selection_scope_n < selection_scope_count; selection_scope_n++)
{
ExampleSelection* selection = &selections_data[selection_scope_n];
const int ITEMS_COUNT = multiple_selection_scopes ? 12 : 1000;
const int ITEMS_COUNT = use_multiple_scopes ? 12 : 1000; // Smaller count to make it easier to see multiple scopes in same screen.
ImGui::PushID(selection_scope_n);
// Open a scrolling region
bool draw_selection = true;
if (multiple_selection_scopes)
if (use_multiple_scopes)
{
ImGui::SeparatorText("Selection scope");
}
@ -2952,15 +2960,13 @@ static void ShowDemoWindowMultiSelect()
if (widget_type == WidgetType_TreeNode)
ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(ImGui::GetStyle().ItemSpacing.x, 0.0f));
ImGuiMultiSelectFlags flags = ImGuiMultiSelectFlags_None;
if (multiple_selection_scopes)
;// flags |= ImGuiMultiSelectFlags_ClearOnClickRectVoid;
else
flags |= ImGuiMultiSelectFlags_ClearOnClickWindowVoid;
ImGuiMultiSelectData* multi_select_data = ImGui::BeginMultiSelect(flags, (void*)(intptr_t)selection->RangeRef, selection->GetSelected(selection->RangeRef));
ImGuiMultiSelectFlags local_flags = flags;
if (use_multiple_scopes)
local_flags &= ~ImGuiMultiSelectFlags_ClearOnClickWindowVoid; // local_flags |= ImGuiMultiSelectFlags_ClearOnClickRectVoid;
ImGuiMultiSelectData* multi_select_data = ImGui::BeginMultiSelect(local_flags, (void*)(intptr_t)selection->RangeRef, selection->GetSelected(selection->RangeRef));
selection->ApplyRequests(multi_select_data, ITEMS_COUNT);
if (multiple_selection_scopes)
if (use_multiple_scopes)
ImGui::Text("Selection size: %d", selection->GetSelectionSize()); // Draw counter below Separator and after BeginMultiSelect()
if (use_table)
@ -3062,7 +3068,7 @@ static void ShowDemoWindowMultiSelect()
if (widget_type == WidgetType_TreeNode)
ImGui::PopStyleVar();
if (multiple_selection_scopes == false)
if (use_multiple_scopes == false)
ImGui::EndListBox();
}
ImGui::PopID(); // ImGui::PushID(selection_scope_n);