MultiSelect: Added ImGuiMultiSelectFlags_NoRangeSelect. Fixed ImGuiMultiSelectFlags_ScopeRect not querying proper window hover.

imgui.h

@@ -2772,15 +2772,16 @@ enum ImGuiMultiSelectFlags_
     ImGuiMultiSelectFlags_None                  = 0,
     ImGuiMultiSelectFlags_SingleSelect          = 1 << 0,   // Disable selecting more than one item. This is available to allow single-selection code to share same code/logic if desired. It essentially disables the main purpose of BeginMultiSelect() tho!
     ImGuiMultiSelectFlags_NoSelectAll           = 1 << 1,   // Disable CTRL+A shortcut sending a SelectAll request.
-    ImGuiMultiSelectFlags_BoxSelect             = 1 << 2,   // Enable box-selection (only supporting 1D list when using clipper, not 2D grids). Box-selection works better with little bit of spacing between items hit-box in order to be able to aim at empty space.
-    ImGuiMultiSelectFlags_BoxSelect2d           = 1 << 3,   // Enable box-selection with 2D layout/grid support. This alters clipping logic so that e.g. horizontal movements will update selection of normally clipped items.
-    ImGuiMultiSelectFlags_BoxSelectNoScroll     = 1 << 4,   // Disable scrolling when box-selecting near edges of scope.
-    ImGuiMultiSelectFlags_ClearOnEscape         = 1 << 5,   // Clear selection when pressing Escape while scope is focused.
-    ImGuiMultiSelectFlags_ClearOnClickVoid      = 1 << 6,   // Clear selection when clicking on empty location within scope.
-    ImGuiMultiSelectFlags_ScopeWindow           = 1 << 7,   // Scope for _ClearOnClickVoid and _BoxSelect is whole window (Default). Use if BeginMultiSelect() covers a whole window.
-    ImGuiMultiSelectFlags_ScopeRect             = 1 << 8,   // Scope for _ClearOnClickVoid and _BoxSelect is rectangle covering submitted items. Use if multiple BeginMultiSelect() are used in the same host window.
-    ImGuiMultiSelectFlags_SelectOnClick         = 1 << 9,   // Apply selection on mouse down when clicking on unselected item. (Default)
-    ImGuiMultiSelectFlags_SelectOnClickRelease  = 1 << 10,  // Apply selection on mouse release when clicking an unselected item. Allow dragging an unselected item without altering selection.
+    ImGuiMultiSelectFlags_NoRangeSelect         = 1 << 2,   // Disable Shift+Click/Shift+Keyboard handling (useful for unordered 2D selection).
+    ImGuiMultiSelectFlags_BoxSelect             = 1 << 3,   // Enable box-selection (only supporting 1D list when using clipper, not 2D grids). Box-selection works better with little bit of spacing between items hit-box in order to be able to aim at empty space.
+    ImGuiMultiSelectFlags_BoxSelect2d           = 1 << 4,   // Enable box-selection with 2D layout/grid support. This alters clipping logic so that e.g. horizontal movements will update selection of normally clipped items.
+    ImGuiMultiSelectFlags_BoxSelectNoScroll     = 1 << 5,   // Disable scrolling when box-selecting near edges of scope.
+    ImGuiMultiSelectFlags_ClearOnEscape         = 1 << 6,   // Clear selection when pressing Escape while scope is focused.
+    ImGuiMultiSelectFlags_ClearOnClickVoid      = 1 << 7,   // Clear selection when clicking on empty location within scope.
+    ImGuiMultiSelectFlags_ScopeWindow           = 1 << 8,   // Use if BeginMultiSelect() covers a whole window (Default): Scope for _ClearOnClickVoid and _BoxSelect is whole window (Default).
+    ImGuiMultiSelectFlags_ScopeRect             = 1 << 9,   // Use if multiple BeginMultiSelect() are used in the same host window: Scope for _ClearOnClickVoid and _BoxSelect is rectangle covering submitted items.
+    ImGuiMultiSelectFlags_SelectOnClick         = 1 << 10,  // Apply selection on mouse down when clicking on unselected item. (Default)
+    ImGuiMultiSelectFlags_SelectOnClickRelease  = 1 << 11,  // Apply selection on mouse release when clicking an unselected item. Allow dragging an unselected item without altering selection.
 };
 
 // Main IO structure returned by BeginMultiSelect()/EndMultiSelect().

imgui_demo.cpp

@@ -3277,6 +3277,7 @@ static void ShowDemoWindowMultiSelect()
                 ImGui::Checkbox("Show color button", &show_color_button);
                 ImGui::CheckboxFlags("ImGuiMultiSelectFlags_SingleSelect", &flags, ImGuiMultiSelectFlags_SingleSelect);
                 ImGui::CheckboxFlags("ImGuiMultiSelectFlags_NoSelectAll", &flags, ImGuiMultiSelectFlags_NoSelectAll);
+                ImGui::CheckboxFlags("ImGuiMultiSelectFlags_NoRangeSelect", &flags, ImGuiMultiSelectFlags_NoRangeSelect);
                 ImGui::CheckboxFlags("ImGuiMultiSelectFlags_BoxSelect", &flags, ImGuiMultiSelectFlags_BoxSelect);
                 ImGui::CheckboxFlags("ImGuiMultiSelectFlags_BoxSelectNoScroll", &flags, ImGuiMultiSelectFlags_BoxSelectNoScroll);
                 ImGui::CheckboxFlags("ImGuiMultiSelectFlags_ClearOnEscape", &flags, ImGuiMultiSelectFlags_ClearOnEscape);

imgui_widgets.cpp

@@ -7303,6 +7303,8 @@ ImGuiMultiSelectIO* ImGui::BeginMultiSelect(ImGuiMultiSelectFlags flags)
 
     // Use copy of keyboard mods at the time of the request, otherwise we would requires mods to be held for an extra frame.
     ms->KeyMods = g.NavJustMovedToId ? g.NavJustMovedToKeyMods : g.IO.KeyMods;
+    if (flags & ImGuiMultiSelectFlags_NoRangeSelect)
+        ms->KeyMods &= ~ImGuiMod_Shift;
 
     // Bind storage
     ImGuiMultiSelectState* storage = g.MultiSelectStorage.GetOrAddByKey(id);
@@ -7416,7 +7418,9 @@ ImGuiMultiSelectIO* ImGui::EndMultiSelect()
 
     // Clear selection when clicking void?
     // We specifically test for IsMouseDragPastThreshold(0) == false to allow box-selection!
-    const bool scope_hovered = (ms->Flags & ImGuiMultiSelectFlags_ScopeRect) ? scope_rect.Contains(g.IO.MousePos) : IsWindowHovered();
+    bool scope_hovered = IsWindowHovered();
+    if (scope_hovered && (ms->Flags & ImGuiMultiSelectFlags_ScopeRect))
+        scope_hovered &= scope_rect.Contains(g.IO.MousePos);
     if (scope_hovered && g.HoveredId == 0 && g.ActiveId == 0)
     {
         if (ms->Flags & ImGuiMultiSelectFlags_BoxSelect)