X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0c8392cac2d36d0d211432e71d3b24d3d93c22db..2b01fd49183b64be59c4e7ba9bdaee479ff29ed2:/include/wx/vscroll.h diff --git a/include/wx/vscroll.h b/include/wx/vscroll.h index 38f3a9a615..bead562926 100644 --- a/include/wx/vscroll.h +++ b/include/wx/vscroll.h @@ -2,20 +2,16 @@ // Name: include/wx/vscroll.h // Purpose: wxVScrolledWindow: generalization of wxScrolledWindow // Author: Vadim Zeitlin -// Modified by: +// Modified by: Brad Anderson // Created: 30.05.03 // RCS-ID: $Id$ -// Copyright: (c) 2003 Vadim Zeitlin +// Copyright: (c) 2003 Vadim Zeitlin // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #ifndef _WX_VSCROLL_H_ #define _WX_VSCROLL_H_ -#if defined(__GNUG__) && !defined(__APPLE__) -#pragma interface "vscroll.h" -#endif - #include "wx/panel.h" // base class // ---------------------------------------------------------------------------- @@ -95,10 +91,10 @@ public: virtual bool ScrollPages(int pages); // redraw the specified line - void RefreshLine(size_t line); + virtual void RefreshLine(size_t line); // redraw all lines in the specified range (inclusive) - void RefreshLines(size_t from, size_t to); + virtual void RefreshLines(size_t from, size_t to); // return the item at the specified (in physical coordinates) position or. @@ -118,15 +114,29 @@ public: size_t GetLineCount() const { return m_lineMax; } // get the first currently visible line - size_t GetFirstVisibleLine() const { return m_lineFirst; } + size_t GetVisibleBegin() const { return m_lineFirst; } - // get the last currently visible line - size_t GetLastVisibleLine() const { return m_lineFirst + m_nVisible - 1; } + // get the first currently visible line + size_t GetVisibleEnd() const { return m_lineFirst + m_nVisible; } // is this line currently visible? bool IsVisible(size_t line) const - { return line >= m_lineFirst && line <= GetLastVisibleLine(); } + { return line >= GetVisibleBegin() && line < GetVisibleEnd(); } + + // this is the same as GetVisibleBegin(), exists to match + // GetLastVisibleLine() and for backwards compatibility only + size_t GetFirstVisibleLine() const { return m_lineFirst; } + + // 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 { 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 @@ -163,6 +173,9 @@ protected: // the event handlers void OnSize(wxSizeEvent& event); void OnScroll(wxScrollWinEvent& event); +#if wxUSE_MOUSEWHEEL + void OnMouseWheel(wxMouseEvent& event); +#endif // 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 @@ -193,11 +206,280 @@ private: // partly, visible one) size_t m_nVisible; + // accumulated mouse wheel rotation +#if wxUSE_MOUSEWHEEL + int m_sumWheelRotation; +#endif DECLARE_EVENT_TABLE() DECLARE_NO_COPY_CLASS(wxVScrolledWindow) 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_