+ // this is the same as GetVisibleBegin(), exists to match
+ // GetLastVisibleLine() and for backwards compatibility only
+ size_t GetFirstVisibleLine() const;
+
+ // get the last currently visible line
+ //
+ // this function is unsafe as it returns (size_t)-1 (i.e. a huge positive
+ // number) if the control is empty, use GetVisibleEnd() instead, this one
+ // is kept for backwards compatibility
+ size_t GetLastVisibleLine() const;
+
+ // find the index of the line we need to show at the top of the window such
+ // that the last (fully or partially) visible line is the given one
+ size_t FindFirstFromBottom(size_t lineLast, bool fullyVisible = false);
+
+ // get the total height of the lines between lineMin (inclusive) and
+ // lineMax (exclusive)
+ wxCoord GetLinesHeight(size_t lineMin, size_t lineMax) const;