message: Columns: Fixed dragging when using a same of columns multiple times in the frame.
diff: @@ -10869,6 +10869,8 @@ static float PixelsToOffsetNorm(const ImGuiColumnsSet* columns, float offset)
  return (offset - columns->MinX) / (columns->MaxX - columns->MinX);
  }
  +static inline float GetColumnsRectHalfWidth() { return 4.0f; }
  +
  static float GetDraggedColumnOffset(ImGuiColumnsSet* columns, int column_index)
  {
  // Active (dragged) column always follow mouse. The reason we need this is that dragging a column to the right edge of an auto-resizing
  @@ -10878,7 +10880,7 @@ static float GetDraggedColumnOffset(ImGuiColumnsSet* columns, int column_index)
  IM_ASSERT(column_index > 0); // We cannot drag column 0. If you get this assert you may have a conflict between the ID of your columns and another widgets.
  IM_ASSERT(g.ActiveId == columns->ID + ImGuiID(column_index));
  - float x = g.IO.MousePos.x - g.ActiveIdClickOffset.x - window->Pos.x;
  + float x = g.IO.MousePos.x - g.ActiveIdClickOffset.x + GetColumnsRectHalfWidth() - window->Pos.x;
  x = ImMax(x, ImGui::GetColumnOffset(column_index - 1) + g.Style.ColumnsMinSpacing);
  if ((columns->Flags & ImGuiColumnsFlags_NoPreserveWidths))
  x = ImMin(x, ImGui::GetColumnOffset(column_index + 1) - g.Style.ColumnsMinSpacing);
  @@ -11088,7 +11090,7 @@ void ImGui::EndColumns()
  {
  float x = window->Pos.x + GetColumnOffset(n);
  const ImGuiID column_id = columns->ID + ImGuiID(n);
  - const float column_hw = 4.0f; // Half-width for interaction
  + const float column_hw = GetColumnsRectHalfWidth(); // Half-width for interaction
  const ImRect column_rect(ImVec2(x - column_hw, y1), ImVec2(x + column_hw, y2));
  KeepAliveID(column_id);
  if (IsClippedEx(column_rect, column_id, false))
  @@ -11100,8 +11102,6 @@ void ImGui::EndColumns()
  ButtonBehavior(column_rect, column_id, &hovered, &held);
  if (hovered || held)
  g.MouseCursor = ImGuiMouseCursor_ResizeEW;
  - if (held && g.ActiveIdIsJustActivated)
  - g.ActiveIdClickOffset.x -= column_hw; // Store from center of column line (we used a 8 wide rect for columns clicking). This is used by GetDraggedColumnOffset().
  if (held && !(columns->Columns[n].Flags & ImGuiColumnsFlags_NoResize))
  dragging_column = n;
  }
  