don't call wxYield() from EnsureVisible(), this is too dangerous - and unnecessary...

[wxWidgets.git] / docs / latex / wx / scrolwin.tex

diff --git a/docs/latex/wx/scrolwin.tex b/docs/latex/wx/scrolwin.tex
index f7270d32ffcc2db6634220c6e0554161d82db152..e89c1ae6fc84bd2b7909c05d0240098f8c1b5711 100644 (file)
--- a/docs/latex/wx/scrolwin.tex
+++ b/docs/latex/wx/scrolwin.tex
@@ -6,7 +6,7 @@ scroll positions, thumb sizes and ranges according to the area in view.
 
 As with all windows, an application can draw onto a wxScrolledWindow using a \helpref{device context}{dcoverview}.
 
-You have the option of handling the \helpref{OnPaint}{wxscrolledwindowonpaint} handler
+You have the option of handling the OnPaint handler
 or overriding the \helpref{OnDraw}{wxscrolledwindowondraw} function, which is passed
 a pre-scrolled device context (prepared by \helpref{PrepareDC}{wxscrolledwindowpreparedc}).
 
@@ -14,8 +14,23 @@ If you don't wish to calculate your own scrolling, you must call PrepareDC when
 within OnDraw, to set the device origin for the device context according to the current
 scroll position.
 
+A wxScrolledWindow will normally scroll itself and therefore its child windows as well. It
+might however be desired to scroll a different window than itself: e.g. when designing a
+spreadsheet, you will normally only have to scroll the (usually white) cell area, whereas the
+(usually grey) label area will scroll very differently. For this special purpose, you can
+call \helpref{SetTargetWindow}{wxscrolledwindowsettargetwindow} which means that pressing
+the scrollbars will scroll a different window.
+
+Note that the underlying system knows nothing about scrolling coordinates, so that all system
+functions (mouse events, expose events, refresh calls etc) as well as the position of subwindows
+are relative to the "physical" origin of the scrolled window. If the user insert a child window at
+position (10,10) and scrolls the window down 100 pixels (moving the child window out of the visible
+area), the child window will report a position of (10,-90).
+
+
 \wxheading{Derived from}
 
+\helpref{wxPanel}{wxpanel}\\
 \helpref{wxWindow}{wxwindow}\\
 \helpref{wxEvtHandler}{wxevthandler}\\
 \helpref{wxObject}{wxobject}
@@ -103,6 +118,12 @@ CalcScrolledPosition(0, 0, \&xx, \&yy) will return 10 in yy.
 
 \helpref{CalcUnscrolledPosition}{wxscrolledwindowcalcunscrolledposition}
 
+\pythonnote{The wxPython version of this methods accepts only two
+parameters and returns xx and yy as a tuple of values.}
+
+\perlnote{In wxPerl this method takes two parameters and returns a
+2-element list {\tt ( xx, yy )}.}
+
 \membersection{wxScrolledWindow::CalcUnscrolledPosition}\label{wxscrolledwindowcalcunscrolledposition}
 
 \constfunc{void}{CalcUnscrolledPosition}{
@@ -120,6 +141,12 @@ CalcUnscrolledPosition(0, 10, \&xx, \&yy) will return 0 in yy.
 
 \helpref{CalcScrolledPosition}{wxscrolledwindowcalcscrolledposition}
 
+\pythonnote{The wxPython version of this methods accepts only two
+parameters and returns xx and yy as a tuple of values.}
+
+\perlnote{In wxPerl this method takes two parameters and returns a
+2-element list {\tt ( xx, yy )}.}
+
 \membersection{wxScrolledWindow::Create}\label{wxscrolledwindowcreate}
 
 \func{bool}{Create}{\param{wxWindow*}{ parent}, \param{wxWindowID }{id = -1},\rtfsp
@@ -138,7 +165,9 @@ Enable or disable physical scrolling in the given direction. Physical
 scrolling is the physical transfer of bits up or down the
 screen when a scroll event occurs. If the application scrolls by a
 variable amount (e.g. if there are different font sizes) then physical
-scrolling will not work, and you should switch it off.
+scrolling will not work, and you should switch it off. Note that you
+will have to reposition child windows yourself, if physical scrolling
+is disabled.
 
 \wxheading{Parameters}
 
@@ -170,6 +199,12 @@ scrolling in that direction.
 \helpref{wxScrolledWindow::SetScrollbars}{wxscrolledwindowsetscrollbars},\rtfsp
 \helpref{wxScrolledWindow::GetVirtualSize}{wxscrolledwindowgetvirtualsize}
 
+\pythonnote{The wxPython version of this methods accepts no
+parameters and returns a tuple of values for xUnit and yUnit.}
+
+\perlnote{In wxPerl this method takes no parameters and returns a
+2-element list {\tt ( xUnit, yUnit )}.}
+
 \membersection{wxScrolledWindow::GetVirtualSize}\label{wxscrolledwindowgetvirtualsize}
 
 \constfunc{void}{GetVirtualSize}{\param{int* }{x}, \param{int* }{y}}
@@ -194,6 +229,12 @@ to translate these units to logical units.
 \helpref{wxScrolledWindow::SetScrollbars}{wxscrolledwindowsetscrollbars},\rtfsp
 \helpref{wxScrolledWindow::GetScrollPixelsPerUnit}{wxscrolledwindowgetscrollpixelsperunit}
 
+\pythonnote{The wxPython version of this methods accepts no
+parameters and returns a tuple of values for x and y.}
+
+\perlnote{In wxPerl this method takes no parameters and returns a
+2-element list {\tt ( x, y )}.}
+
 \membersection{wxScrolledWindow::IsRetained}\label{wxscrolledwindowisretained}
 
 \constfunc{bool}{IsRetained}{\void}
@@ -207,7 +248,7 @@ Motif only: TRUE if the window has a backing bitmap.
 Call this function to prepare the device context for drawing a scrolled image. It
 sets the device origin according to the current scroll position.
 
-PrepareDC is called automatically within the default \helpref{wxScrolledWindow::OnPaint}{wxscrolledwindowonpaint} event
+PrepareDC is called automatically within the default wxScrolledWindow::OnPaint event
 handler, so your \helpref{wxScrolledWindow::OnDraw}{wxscrolledwindowondraw} override
 will be passed a 'pre-scrolled' device context. However, if you wish to draw from
 outside of OnDraw (via OnPaint), or you wish to implement OnPaint yourself, you must
@@ -236,7 +277,7 @@ void MyWindow::OnEvent(wxMouseEvent& event)
 \func{virtual void}{OnDraw}{\param{wxDC\& }{dc}}
 
 Called by the default paint event handler to allow the application to define
-painting behaviour without having to worry about calling 
+painting behaviour without having to worry about calling
 \helpref{wxScrolledWindow::PrepareDC}{wxscrolledwindowpreparedc}.
 
 Instead of overriding this function you may also just process the paint event
@@ -271,7 +312,8 @@ that direction).
 
 \func{void}{SetScrollbars}{\param{int}{ pixelsPerUnitX}, \param{int}{ pixelsPerUnitY},\rtfsp
 \param{int}{ noUnitsX}, \param{int}{ noUnitsY},\rtfsp
-\param{int }{xPos = 0}, \param{int}{ yPos = 0}}
+\param{int }{xPos = 0}, \param{int}{ yPos = 0},\rtfsp
+\param{bool }{noRefresh = FALSE}}
 
 Sets up vertical and/or horizontal scrollbars.
 
@@ -289,6 +331,8 @@ Sets up vertical and/or horizontal scrollbars.
 
 \docparam{yPos}{Position to initialize the scrollbars in the vertical direction, in scroll units.}
 
+\docparam{noRefresh}{Will not refresh window if TRUE.}
+
 \wxheading{Remarks}
 
 The first pair of parameters give the number of pixels per `scroll step', i.e. amount
@@ -314,9 +358,16 @@ scroll steps may be variable according to the position in the document, it will
 necessary to derive a new class from wxWindow, overriding {\bf OnSize} and
 adjusting the scrollbars appropriately.
 
-\membersection{wxScrolledWindow::ViewStart}\label{wxscrolledwindowviewstart}
+\membersection{wxScrolledWindow::SetTargetWindow}\label{wxscrolledwindowsettargetwindow}
+
+\func{void}{SetTargetWindow}{\param{wxWindow* }{window}}
 
-\constfunc{void}{ViewStart}{\param{int* }{x}, \param{int* }{ y}}
+Call this function to tell wxScrolledWindow to perform the actually scrolling on
+a different window (not on itself).
+
+\membersection{wxScrolledWindow::GetViewStart}\label{wxscrolledwindowgetviewstart}
+
+\constfunc{void}{GetViewStart}{\param{int* }{x}, \param{int* }{ y}}
 
 Get the position at which the visible portion of the window starts.
 
@@ -339,3 +390,9 @@ by the number of pixels per scroll increment.
 
 \helpref{wxScrolledWindow::SetScrollbars}{wxscrolledwindowsetscrollbars}
 
+\pythonnote{The wxPython version of this methods accepts no
+parameters and returns a tuple of values for x and y.}
+
+\perlnote{In wxPerl this method takes no parameters and returns a
+2-element list {\tt ( x, y )}.}
+