X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/5d6dcfb3273b11322e5b1754fda4550b363a5dae..42e88ddb611d43fe79e1d0c17a764b0848322f1d:/docs/latex/wx/vscroll.tex

diff --git a/docs/latex/wx/vscroll.tex b/docs/latex/wx/vscroll.tex
index 1a647fc704..1f7a07fab4 100644
--- a/docs/latex/wx/vscroll.tex
+++ b/docs/latex/wx/vscroll.tex
@@ -6,7 +6,7 @@
 %% Created:     30.05.03
 %% RCS-ID:      $Id$
 %% Copyright:   (c) 2003 Vadim Zeitlin <vadim@wxwindows.org>
-%% License:     wxWindows license
+%% License:     wxWidgets license
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \section{\class{wxVScrolledWindow}}\label{wxvscrolledwindow}
@@ -33,7 +33,7 @@ moment on the scrolling is handled entirely by wxVScrolledWindow, you only
 need to draw the visible part of contents in your {\tt OnPaint()} method as
 usual. You should use \helpref{GetFirstVisibleLine()}{wxvscrolledwindowgetfirstvisibleline} 
 and \helpref{GetLastVisibleLine()}{wxvscrolledwindowgetlastvisibleline} to
-select the lines to display. ote that the device context origin is not shifted
+select the lines to display. Note that the device context origin is not shifted
 so the first visible line always appears at the point $(0, 0)$ in physical as
 well as logical coordinates.
 
@@ -90,6 +90,25 @@ Just as with the ctor above, {\tt wxVSCROLL} style is always used, there is no
 need to specify it explicitly.
 
 
+\membersection{wxVScrolledWindow::EstimateTotalHeight}\label{wxvscrolledwindowestimatetotalheight}
+
+\constfunc{virtual wxCoord}{EstimateTotalHeight}{\void}
+
+This protected function is used internally by wxVScrolledWindow to estimate the
+total height of the window when \helpref{SetLineCount}{wxvscrolledwindowsetlinecount} 
+is called. The default implementation uses the brute force approach if the
+number of the items in the control is small enough. Otherwise, it tries to find
+the average line height using some lines in the beginning, middle and the end.
+
+If it is undesirable to access all these lines (some of which might be never
+shown) just for the total height calculation, you may override the function and
+provide your own guess better and/or faster.
+
+Note that although returning a totally wrong value would still work, it risks
+to result in very strange scrollbar behaviour so this function should really
+try to make the best guess possible.
+
+
 \membersection{wxVScrolledWindow::GetFirstVisibleLine}\label{wxvscrolledwindowgetfirstvisibleline}
 
 \constfunc{size\_t}{GetFirstVisibleLine}{\void}
@@ -191,7 +210,7 @@ should be less than or equal to {\it to}.
 \func{void}{RefreshAll}{\void}
 
 This function completely refreshes the control, recalculating the number of
-items shown on screen and repaining them. It should be called when the values
+items shown on screen and repainting them. It should be called when the values
 returned by \helpref{OnGetLineHeight}{wxvscrolledwindowongetlineheight} change
 for some reason and the window must be updated to reflect this.