InputText: added ImGuiInputTextFlags_NoHorizontalScroll flag. Added HasSelection() helper in ImGuiTextEditCallbackData as a clarification.

imgui.cpp

@@ -7419,11 +7419,18 @@ static bool InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
         if (edit_state.CursorFollow)
         {
             // Horizontal scroll in chunks of quarter width
-            const float scroll_increment_x = size.x * 0.25f;
+            if (!(flags & ImGuiInputTextFlags_NoHorizontalScroll))
-            if (cursor_offset.x < edit_state.ScrollX)
+            {
-                edit_state.ScrollX = ImMax(0.0f, cursor_offset.x - scroll_increment_x);    
+                const float scroll_increment_x = size.x * 0.25f;
-            else if (cursor_offset.x - size.x >= edit_state.ScrollX)
+                if (cursor_offset.x < edit_state.ScrollX)
-                edit_state.ScrollX = cursor_offset.x - size.x + scroll_increment_x;
+                    edit_state.ScrollX = ImMax(0.0f, cursor_offset.x - scroll_increment_x);    
+                else if (cursor_offset.x - size.x >= edit_state.ScrollX)
+                    edit_state.ScrollX = cursor_offset.x - size.x + scroll_increment_x;
+            }
+            else
+            {
+                edit_state.ScrollX = 0.0f;
+            }
 
             // Vertical scroll
             if (is_multiline)

imgui.h

@@ -461,6 +461,7 @@ enum ImGuiInputTextFlags_
     ImGuiInputTextFlags_CallbackCharFilter  = 1 << 9,   // Call user function to filter character. Modify data->EventChar to replace/filter input, or return 1 to discard character.
     ImGuiInputTextFlags_AllowTabInput       = 1 << 10,  // Pressing TAB input a '\t' character into the text field
     ImGuiInputTextFlags_CtrlEnterForNewLine = 1 << 11,  // In multi-line mode, allow exiting edition by pressing Enter. Ctrl+Enter to add new line (by default adds new lines with Enter).
+    ImGuiInputTextFlags_NoHorizontalScroll  = 1 << 12,  // Disable following the cursor horizontally
     // [Internal]
     ImGuiInputTextFlags_Multiline           = 1 << 20   // For internal use by InputTextMultiline()
 };
@@ -919,6 +920,7 @@ struct ImGuiTextEditCallbackData
     // NB: calling those function loses selection.
     void DeleteChars(int pos, int bytes_count);
     void InsertChars(int pos, const char* text, const char* text_end = NULL);
+    bool HasSelection() const { return SelectionStart != SelectionEnd; }
 };
 
 // ImColor() is just a helper that implicity converts to either ImU32 (packed 4x1 byte) or ImVec4 (4x1 float)