Columns: Added ImGuiColumnsFlags_NoResize flag (internal). (#913, #125)

imgui.cpp

@@ -10100,7 +10100,9 @@ void ImGui::EndColumns()
 			if (IsClippedEx(column_rect, &column_id, false))
 				continue;
             
-            bool hovered, held;
+            bool hovered = false, held = false;
+            if (!(window->DC.ColumnsFlags & ImGuiColumnsFlags_NoResize))
+            {
                 ButtonBehavior(column_rect, column_id, &hovered, &held);
                 if (hovered || held)
                     g.MouseCursor = ImGuiMouseCursor_ResizeEW;
@@ -10108,6 +10110,7 @@ void ImGui::EndColumns()
                     g.ActiveIdClickOffset.x -= column_w; // Store from center of column line (we used a 8 wide rect for columns clicking). This is used by GetDraggedColumnOffset().
                 if (held)
                     dragging_column = i;
+            }
 
             // Draw column
             const ImU32 col = GetColorU32(held ? ImGuiCol_SeparatorActive : hovered ? ImGuiCol_SeparatorHovered : ImGuiCol_Separator);

imgui_internal.h

@@ -187,8 +187,9 @@ enum ImGuiColumnsFlags_
 {
     // Default: 0
     ImGuiColumnsFlags_NoBorder              = 1 << 0,   // Disable column dividers
-    ImGuiColumnsFlags_NoPreserveWidths      = 1 << 1,   // Disable column width preservation when adjusting columns
-    ImGuiColumnsFlags_NoForceWithinWindow   = 1 << 2    // Disable forcing columns to fit within window
+    ImGuiColumnsFlags_NoResize              = 1 << 1,   // Disable resizing columns when clicking on the dividers
+    ImGuiColumnsFlags_NoPreserveWidths      = 1 << 2,   // Disable column width preservation when adjusting columns
+    ImGuiColumnsFlags_NoForceWithinWindow   = 1 << 3    // Disable forcing columns to fit within window
 };
 
 enum ImGuiSelectableFlagsPrivate_