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reverted wxHVScrolledWindow patch (rev 1.19/1.21 of vscroll.h/.cpp) because not only we don't want to duplicate code like this but it also broke wxHtmlListBox by making scrolling in it O(N) instead of O(1)

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38715 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 2006-04-14 15:55:28 +00:00
parent fac6eaec24
commit 234b1c0147
2 changed files with 19 additions and 1228 deletions
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269
include/wx/vscroll.h
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@ -2,7 +2,7 @@
// Name: include/wx/vscroll.h
// Purpose: wxVScrolledWindow: generalization of wxScrolledWindow
// Author: Vadim Zeitlin
// Modified by: Brad Anderson
// Modified by:
// Created: 30.05.03
// RCS-ID: $Id$
// Copyright: (c) 2003 Vadim Zeitlin <vadim@wxwidgets.org>
@ -135,8 +135,6 @@ public:
// is kept for backwards compatibility
size_t GetLastVisibleLine() const { return GetVisibleEnd() - 1; }
// layout the children (including the sizer if needed)
virtual bool Layout();
protected:
// this function must be overridden in the derived class and it should
@ -216,270 +214,5 @@ private:
DECLARE_ABSTRACT_CLASS(wxVScrolledWindow)
};
// ----------------------------------------------------------------------------
// wxHVScrolledWindow
// ----------------------------------------------------------------------------
/*
This class is strongly influenced by wxVScrolledWindow. In fact, much of
code is line for line the same except it explicitly states which axis is
being worked on. Like wxVScrolledWindow, this class is here to provide
an easy way to implement variable line sizes. The difference is that
wxVScrolledWindow only works with vertical scrolling. This class extends
the behavior of wxVScrolledWindow to the horizontal axis in addition to the
vertical axis.
The scrolling is also "virtual" in the sense that line widths and heights
only need to be known for lines that are currently visible.
Like wxVScrolledWindow, this is a generalization of the wxScrolledWindow
class which can be only used when all horizontal lines have the same width
and all of the vertical lines have the same height. Like wxVScrolledWinow
it lacks some of wxScrolledWindow features such as scrolling another window
or only scrolling a rectangle of the window and not its entire client area.
If only vertical scrolling is needed, wxVScrolledWindow is recommended
because it is simpler to use (and you get to type less).
There is no wxHScrolledWindow but horizontal only scrolling is implemented
easily enough with this class. If someone feels the need for such a class,
implementing it is trivial.
*/
class WXDLLEXPORT wxHVScrolledWindow : public wxPanel
{
public:
// constructors and such
// ---------------------
// default ctor, you must call Create() later
wxHVScrolledWindow() { Init(); }
// normal ctor, no need to call Create() after this one
//
// note that wxVSCROLL and wxHSCROLL are always automatically added to our
// style, there is no need to specify them explicitly
wxHVScrolledWindow(wxWindow *parent,
wxWindowID id = wxID_ANY,
const wxPoint& pos = wxDefaultPosition,
const wxSize& size = wxDefaultSize,
long style = 0,
const wxString& name = wxPanelNameStr)
{
Init();
(void)Create(parent, id, pos, size, style, name);
}
// same as the previous ctor but returns status code: true if ok
//
// just as with the ctor above, wxVSCROLL and wxHSCROLL styles are always
// used, there is no need to specify them
bool Create(wxWindow *parent,
wxWindowID id = wxID_ANY,
const wxPoint& pos = wxDefaultPosition,
const wxSize& size = wxDefaultSize,
long style = 0,
const wxString& name = wxPanelNameStr)
{
return wxPanel::Create(parent, id, pos, size,
style | wxVSCROLL | wxHSCROLL, name);
}
// operations
// ----------
// set the number of lines the window contains for each axis: the derived
// class must provide the widths and heights for all lines with indices up
// to each of the one given here in its OnGetColumnWidth() and
// OnGetRowHeight()
void SetRowColumnCounts(size_t rowCount, size_t columnCount);
// with physical scrolling on, the device origin is changed properly when
// a wxPaintDC is prepared, children are actually moved and layed out
// properly, and the contents of the window (pixels) are actually moved
void EnablePhysicalScrolling(bool scrolling = true)
{ m_physicalScrolling = scrolling; }
// scroll to the specified line: it will become the first visible line in
// the window
//
// return true if we scrolled the window, false if nothing was done
bool ScrollToRow(size_t row);
bool ScrollToColumn(size_t column);
bool ScrollToRowColumn(size_t row, size_t column);
// scroll by the specified number of lines/pages
virtual bool ScrollRows(int rows);
virtual bool ScrollColumns(int columns);
virtual bool ScrollRowsColumns(int rows, int columns);
virtual bool ScrollRowPages(int pages);
virtual bool ScrollColumnPages(int pages);
virtual bool ScrollPages(int rowPages, int columnPages);
// redraw the specified line
virtual void RefreshRow(size_t line);
virtual void RefreshColumn(size_t line);
virtual void RefreshRowColumn(size_t row, size_t column);
// redraw all lines in the specified range (inclusive)
virtual void RefreshRows(size_t from, size_t to);
virtual void RefreshColumns(size_t from, size_t to);
virtual void RefreshRowsColumns(size_t fromRow, size_t toRow,
size_t fromColumn, size_t toColumn);
// return the horizontal and vertical line within a wxPoint at the
// specified (in physical coordinates) position or.
// wxNOT_FOUND in either or both axes if no line is present at the
// requested coordinates, i.e. if it is past the last lines
wxPoint HitTest(wxCoord x, wxCoord y) const;
wxPoint HitTest(const wxPoint& pt) const { return HitTest(pt.x, pt.y); }
// recalculate all our parameters and redisplay all lines
virtual void RefreshAll();
// accessors
// ---------
// get the number of lines this window contains (previously set by
// SetLineCount())
size_t GetRowCount() const { return m_rowsMax; }
size_t GetColumnCount() const { return m_columnsMax; }
wxSize GetRowColumnCounts() const
{ return wxSize((int)m_columnsMax, (int)m_rowsMax); }
// get the first currently visible line/lines
size_t GetVisibleRowsBegin() const { return m_rowsFirst; }
size_t GetVisibleColumnsBegin() const { return m_columnsFirst; }
wxPoint GetVisibleBegin() const
{ return wxPoint((int)m_columnsFirst, (int)m_rowsFirst); }
// get the last currently visible line/lines
size_t GetVisibleRowsEnd() const
{ return m_rowsFirst + m_nRowsVisible; }
size_t GetVisibleColumnsEnd() const
{ return m_columnsFirst + m_nColumnsVisible; }
wxPoint GetVisibleEnd() const
{ return wxPoint((int)(m_columnsFirst + m_nColumnsVisible),
(int)(m_rowsFirst + m_nRowsVisible)); }
// is this line currently visible?
bool IsRowVisible(size_t row) const
{ return row >= m_rowsFirst &&
row < GetVisibleRowsEnd(); }
bool IsColumnVisible(size_t column) const
{ return column >= m_columnsFirst &&
column < GetVisibleColumnsEnd(); }
bool IsVisible(size_t row, size_t column) const
{ return IsRowVisible(row) && IsColumnVisible(column); }
// layout the children (including the sizer if needed)
virtual bool Layout();
protected:
// these functions must be overridden in the derived class and they should
// return the width or height of the given line in pixels
virtual wxCoord OnGetRowHeight(size_t n) const = 0;
virtual wxCoord OnGetColumnWidth(size_t n) const = 0;
// the following functions don't need to be overridden but it may be useful
// to do if calculating the lines widths or heights is a relatively
// expensive operation as it gives the user code a possibility to calculate
// several of them at once
//
// OnGetRowsHeightHint() and OnGetColumnsWidthHint() are normally called
// just before OnGetRowHeight() and OnGetColumnWidth(), respectively, but
// you shouldn't rely on the latter methods being called for all lines in
// the interval specified here. It is also possible that OnGetRowHeight()
// or OnGetColumnWidth() will be called for the lines outside of this
// interval, so this is really just a hint, not a promise.
//
// finally note that min is inclusive, while max is exclusive, as usual
virtual void OnGetRowsHeightHint(size_t WXUNUSED(rowMin),
size_t WXUNUSED(rowMax)) const { }
virtual void OnGetColumnsWidthHint(size_t WXUNUSED(columnMin),
size_t WXUNUSED(columnMax)) const { }
// when the number of lines changes, we try to estimate the total width or
// height of all lines which is a rather expensive operation in terms of
// lines access, so if the user code may estimate the average height
// better/faster than we do, it should override this function to implement
// its own logic
//
// this function should return the best guess for the total height it may
// make
virtual wxCoord EstimateTotalHeight() const;
virtual wxCoord EstimateTotalWidth() const;
// the event handlers
void OnSize(wxSizeEvent& event);
void OnScroll(wxScrollWinEvent& event);
#if wxUSE_MOUSEWHEEL
void OnMouseWheel(wxMouseEvent& event);
#endif
// find the index of the horizontal 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 FindFirstFromRight(size_t columnLast, bool fullyVisible = false);
// find the index of the vertical 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 rowLast, bool fullyVisible = false);
// get the total width or height of the lines between lineMin (inclusive)
// and lineMax (exclusive)
wxCoord GetRowsHeight(size_t rowMin, size_t rowMax) const;
wxCoord GetColumnsWidth(size_t columnMin, size_t columnMax) const;
// update the thumb size shown by the scrollbar
void UpdateScrollbars();
// shifts the specified dc by the scroll position
void PrepareDC(wxDC& dc);
private:
// common part of all ctors
void Init();
// the total number of (logical) lines for each axis
size_t m_rowsMax;
size_t m_columnsMax;
// the total (estimated) height
wxCoord m_heightTotal;
// the total (estimated) width
wxCoord m_widthTotal;
// the first currently visible line on each axis
size_t m_rowsFirst;
size_t m_columnsFirst;
// the number of currently visible lines for each axis (including the last,
// possibly only partly, visible one)
size_t m_nRowsVisible;
size_t m_nColumnsVisible;
// accumulated mouse wheel rotation
#if wxUSE_MOUSEWHEEL
int m_sumWheelRotation;
#endif
// do child scrolling (used in DoPrepareDC())
bool m_physicalScrolling;
DECLARE_EVENT_TABLE()
DECLARE_NO_COPY_CLASS(wxHVScrolledWindow)
DECLARE_ABSTRACT_CLASS(wxHVScrolledWindow)
};
#endif // _WX_VSCROLL_H_

978
src/generic/vscroll.cpp
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