Clipper, Tables: added ImGuiListClipperFlags, ImGuiListClipperFlags_NoSetTableRowCounters. (#8886)

a0cdac48e0 revealed the issue but technically the core issue is that clipper assume 1 item = 1 table row.

imgui.h

@@ -29,7 +29,7 @@
 // Library Version
 // (Integer encoded as XYYZZ for use in #if preprocessor conditionals, e.g. '#if IMGUI_VERSION_NUM >= 12345')
 #define IMGUI_VERSION       "1.92.3 WIP"
-#define IMGUI_VERSION_NUM   19223
+#define IMGUI_VERSION_NUM   19224
 #define IMGUI_HAS_TABLE             // Added BeginTable() - from IMGUI_VERSION_NUM >= 18000
 #define IMGUI_HAS_TEXTURES          // Added ImGuiBackendFlags_RendererHasTextures - from IMGUI_VERSION_NUM >= 19198
 
@@ -246,6 +246,7 @@ typedef int ImGuiInputFlags;        // -> enum ImGuiInputFlags_      // Flags: f
 typedef int ImGuiInputTextFlags;    // -> enum ImGuiInputTextFlags_  // Flags: for InputText(), InputTextMultiline()
 typedef int ImGuiItemFlags;         // -> enum ImGuiItemFlags_       // Flags: for PushItemFlag(), shared by all items
 typedef int ImGuiKeyChord;          // -> ImGuiKey | ImGuiMod_XXX    // Flags: for IsKeyChordPressed(), Shortcut() etc. an ImGuiKey optionally OR-ed with one or more ImGuiMod_XXX values.
+typedef int ImGuiListClipperFlags;  // -> enum ImGuiListClipperFlags_// Flags: for ImGuiListClipper
 typedef int ImGuiPopupFlags;        // -> enum ImGuiPopupFlags_      // Flags: for OpenPopup*(), BeginPopupContext*(), IsPopupOpen()
 typedef int ImGuiMultiSelectFlags;  // -> enum ImGuiMultiSelectFlags_// Flags: for BeginMultiSelect()
 typedef int ImGuiSelectableFlags;   // -> enum ImGuiSelectableFlags_ // Flags: for Selectable()
@@ -2782,6 +2783,13 @@ struct ImGuiStorage
 #endif
 };
 
+// Flags for ImGuiListClipper (currently not fully exposed in function calls: a future refactor will likely add this to ImGuiListClipper::Begin function equivalent)
+enum ImGuiListClipperFlags_
+{
+    ImGuiListClipperFlags_None                  = 0,
+    ImGuiListClipperFlags_NoSetTableRowCounters = 1 << 0,   // [Internal] Disabled modifying table row counters. Avoid assumption that 1 clipper item == 1 table row.
+};
+
 // Helper: Manually clip large list of items.
 // If you have lots evenly spaced items and you have random access to the list, you can perform coarse
 // clipping based on visibility to only submit items that are in view.
@@ -2812,6 +2820,7 @@ struct ImGuiListClipper
     double          StartPosY;          // [Internal] Cursor position at the time of Begin() or after table frozen rows are all processed
     double          StartSeekOffsetY;   // [Internal] Account for frozen rows in a table and initial loss of precision in very large windows.
     void*           TempData;           // [Internal] Internal data
+    ImGuiListClipperFlags Flags;        // [Internal] Flags, currently not yet well exposed.
 
     // items_count: Use INT_MAX if you don't know how many items you have (in which case the cursor won't be advanced in the final step, and you can call SeekCursorForItem() manually if you need)
     // items_height: Use -1.0f to be calculated automatically on first step. Otherwise pass in the distance between your items, typically GetTextLineHeightWithSpacing() or GetFrameHeightWithSpacing().