Clipper: remove ForceDisplayRangeByIndices/ForceDisplayRangeByPositio…

…ns functions until we find a need for them, since ocornut#3841 is now solved automatically.

docs/TODO.txt

@@ -142,7 +142,7 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - plot: option/feature: draw unit
  - plot: add a helper e.g. Plot(char* label, float value, float time_span=2.0f) that stores values and Plot them for you - probably another function name. and/or automatically allow to plot ANY displayed value (more reliance on stable ID)
 
- - clipper: ability to force display 1 item in the list would be convenient (for patterns where we need to set active id etc.)
+ - clipper: ability to force display 1 item in the list would be convenient (for patterns where we need to set active id etc.) (#3841) (can resurrect ForceDisplayRangeXXX functions removed)
  - clipper: ability to disable the clipping through a simple flag/bool.
  - clipper: ability to run without knowing full count in advance.
  - clipper: horizontal clipping support. (#2580)

imgui.cpp

@@ -2405,24 +2405,6 @@ void ImGuiListClipper::End()
         data->ListClipper->TempData = data;
 }
 
-void ImGuiListClipper::ForceDisplayRangeByIndices(int item_min, int item_max)
-{
-    ImGuiListClipperData* data = (ImGuiListClipperData*)TempData;
-    IM_ASSERT(DisplayStart < 0); // Only allowed after Begin() and if there has not been a specified range yet.
-    IM_ASSERT(item_min <= item_max);
-    if (item_min < item_max)
-        data->Ranges.push_back(ImGuiListClipperRange::FromIndices(item_min, item_max));
-}
-
-void ImGuiListClipper::ForceDisplayRangeByPositions(float y_min, float y_max)
-{
-    ImGuiListClipperData* data = (ImGuiListClipperData*)TempData;
-    IM_ASSERT(DisplayStart < 0); // Only allowed after Begin() and if there has not been a specified range yet.
-    IM_ASSERT(y_min <= y_max);
-    if (y_min < y_max)
-        data->Ranges.push_back(ImGuiListClipperRange::FromPositions(y_min, y_max, 0, 0));
-}
-
 bool ImGuiListClipper::Step()
 {
     ImGuiContext& g = *GImGui;

imgui.h

@@ -2208,10 +2208,6 @@ struct ImGuiListClipper
     IMGUI_API void  End();             // Automatically called on the last call of Step() that returns false.
     IMGUI_API bool  Step();            // Call until it returns false. The DisplayStart/DisplayEnd fields will be set and you can process/draw those items.
 
-    // Call ForceDisplayRangeXXX functions before first call to Step() if you need a range of items to be displayed regardless of visibility.
-    IMGUI_API void  ForceDisplayRangeByIndices(int item_min, int item_max); // item_max is exclusive e.g. use (42, 42+1) to make item 42 always visible BUT due to alignment/padding of certain items it is likely that an extra item may be included on either end of the display range.
-    IMGUI_API void  ForceDisplayRangeByPositions(float y_min, float y_max); // Absolute coordinates
-
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
     inline ImGuiListClipper(int items_count, float items_height = -1.0f) { memset(this, 0, sizeof(*this)); ItemsCount = -1; Begin(items_count, items_height); } // [removed in 1.79]
 #endif