+#include "wx/panel.h"
+#include "wx/position.h"
+
+class WXDLLEXPORT wxVarScrollHelperEvtHandler;
+
+
+// Using the same techniques as the wxScrolledWindow class |
+// hierarchy, the wx[V/H/HV]ScrolledWindow classes are slightly |
+// more complex (compare with the diagram outlined in |
+// scrolwin.h) for the purpose of reducing code duplication |
+// through the use of mix-in classes. |
+// |
+// wxVarScrollHelperBase |
+// / \ |
+// / \ |
+// V V |
+// wxVarHScrollHelper wxVarVScrollHelper |
+// | \ / | |
+// | \ / | |
+// | V V | |
+// | wxVarHVScrollHelper | |
+// | | | |
+// | | V |
+// | wxPanel | wxVarVScrollLegacyAdaptor |
+// | / \ \ | | |
+// | / \ `-----|----------. | |
+// | / \ | \ | |
+// | / \ | \ | |
+// V V \ | V V |
+// wxHScrolledWindow \ | wxVScrolledWindow |
+// V V |
+// wxHVScrolledWindow |
+// |
+// |
+// Border added to suppress GCC multi-line comment warnings ->|
+
+
+// ===========================================================================
+// wxVarScrollHelperBase
+// ===========================================================================
+
+// Provides all base common scroll calculations needed for either orientation,
+// automatic scrollbar functionality, saved scroll positions, functionality
+// for changing the target window to be scrolled, as well as defining all
+// required virtual functions that need to be implemented for any orientation
+// specific work.
+
+class WXDLLEXPORT wxVarScrollHelperBase
+{
+public:
+ // constructors and such
+ // ---------------------
+
+ wxVarScrollHelperBase(wxWindow *winToScroll);
+ virtual ~wxVarScrollHelperBase();
+
+ // operations
+ // ----------
+
+ // with physical scrolling on, the device origin is changed properly when
+ // a wxPaintDC is prepared, children are actually moved and laid out
+ // properly, and the contents of the window (pixels) are actually moved
+ void EnablePhysicalScrolling(bool scrolling = true)
+ { m_physicalScrolling = scrolling; }
+
+ // wxNOT_FOUND if none, i.e. if it is below the last item
+ virtual int HitTest(wxCoord coord) const;
+
+ // recalculate all our parameters and redisplay all units
+ virtual void RefreshAll();
+
+ // accessors
+ // ---------
+
+ // get the first currently visible unit
+ size_t GetVisibleBegin() const { return m_unitFirst; }
+
+ // get the last currently visible unit
+ size_t GetVisibleEnd() const
+ { return m_unitFirst + m_nUnitsVisible; }
+
+ // is this unit currently visible?
+ bool IsVisible(size_t unit) const
+ { return unit >= m_unitFirst && unit < GetVisibleEnd(); }
+
+ // translate between scrolled and unscrolled coordinates
+ int CalcScrolledPosition(int coord) const
+ { return DoCalcScrolledPosition(coord); }
+ int CalcUnscrolledPosition(int coord) const
+ { return DoCalcUnscrolledPosition(coord); }
+
+ virtual int DoCalcScrolledPosition(int coord) const;
+ virtual int DoCalcUnscrolledPosition(int coord) const;
+
+ // update the thumb size shown by the scrollbar
+ virtual void UpdateScrollbar();
+ void RemoveScrollbar();
+
+ // Normally the wxScrolledWindow will scroll itself, but in some rare
+ // occasions you might want it to scroll [part of] another window (e.g. a
+ // child of it in order to scroll only a portion the area between the
+ // scrollbars (spreadsheet: only cell area will move).
+ virtual void SetTargetWindow(wxWindow *target);
+ virtual wxWindow *GetTargetWindow() const { return m_targetWindow; }
+
+ // Override this function to draw the graphic (or just process EVT_PAINT)
+ //virtual void OnDraw(wxDC& WXUNUSED(dc)) { }
+
+ // change the DC origin according to the scroll position. To properly
+ // forward calls to wxWindow::Layout use WX_FORWARD_TO_SCROLL_HELPER()
+ // derived class
+ virtual void DoPrepareDC(wxDC& dc);
+
+ // the methods to be called from the window event handlers
+ void HandleOnScroll(wxScrollWinEvent& event);
+ void HandleOnSize(wxSizeEvent& event);
+#if wxUSE_MOUSEWHEEL
+ void HandleOnMouseWheel(wxMouseEvent& event);
+#endif // wxUSE_MOUSEWHEEL
+
+ // these functions must be overidden in the derived class to return
+ // orientation specific data (e.g. the width for vertically scrolling
+ // derivatives in the case of GetOrientationTargetSize())
+ virtual int GetOrientationTargetSize() const = 0;
+ virtual int GetNonOrientationTargetSize() const = 0;
+ virtual wxOrientation GetOrientation() const = 0;
+
+protected:
+ // all *Unit* functions are protected to be exposed by
+ // wxVarScrollHelperBase implementations (with appropriate names)
+
+ // get the number of units this window contains (previously set by
+ // SetUnitCount())
+ size_t GetUnitCount() const { return m_unitMax; }
+
+ // set the number of units the helper contains: the derived class must
+ // provide the sizes for all units with indices up to the one given here
+ // in its OnGetUnitSize()
+ void SetUnitCount(size_t count);
+
+ // redraw the specified unit
+ virtual void RefreshUnit(size_t unit);
+
+ // redraw all units in the specified range (inclusive)
+ virtual void RefreshUnits(size_t from, size_t to);
+
+ // scroll to the specified unit: it will become the first visible unit in
+ // the window
+ //
+ // return true if we scrolled the window, false if nothing was done
+ bool DoScrollToUnit(size_t unit);
+
+ // scroll by the specified number of units/pages
+ virtual bool DoScrollUnits(int units);
+ virtual bool DoScrollPages(int pages);
+
+ // this function must be overridden in the derived class and it should
+ // return the size of the given unit in pixels
+ virtual wxCoord OnGetUnitSize(size_t n) const = 0;
+
+ // this function doesn't have to be overridden but it may be useful to do
+ // it if calculating the units' sizes is a relatively expensive operation
+ // as it gives the user code a possibility to calculate several of them at
+ // once
+ //
+ // OnGetUnitsSizeHint() is normally called just before OnGetUnitSize() but
+ // you shouldn't rely on the latter being called for all units in the
+ // interval specified here. It is also possible that OnGetUnitHeight() will
+ // be called for the units outside of this interval, so this is really just
+ // a hint, not a promise.
+ //
+ // finally note that unitMin is inclusive, while unitMax is exclusive, as
+ // usual
+ virtual void OnGetUnitsSizeHint(size_t WXUNUSED(unitMin),
+ size_t WXUNUSED(unitMax)) const
+ { }
+
+ // when the number of units changes, we try to estimate the total size
+ // of all units which is a rather expensive operation in terms of unit
+ // access, so if the user code may estimate the average size
+ // 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 size it may
+ // make
+ virtual wxCoord EstimateTotalSize() const { return DoEstimateTotalSize(); }
+
+ wxCoord DoEstimateTotalSize() const;
+
+ // find the index of the unit we need to show to fit the specified unit on
+ // the opposite side either fully or partially (depending on fullyVisible)
+ size_t FindFirstVisibleFromLast(size_t last,
+ bool fullyVisible = false) const;
+
+ // get the total size of the units between unitMin (inclusive) and
+ // unitMax (exclusive)
+ wxCoord GetUnitsSize(size_t unitMin, size_t unitMax) const;
+
+ // get the offset of the first visible unit
+ wxCoord GetScrollOffset() const
+ { return GetUnitsSize(0, GetVisibleBegin()); }
+
+ // get the size of the target window
+ wxSize GetTargetSize() const { return m_targetWindow->GetClientSize(); }
+
+ void GetTargetSize(int *w, int *h)
+ {
+ wxSize size = GetTargetSize();
+ if ( w )
+ *w = size.x;
+ if ( h )
+ *h = size.y;
+ }
+
+ // calculate the new scroll position based on scroll event type
+ size_t GetNewScrollPosition(wxScrollWinEvent& event) const;
+
+ // replacement implementation of wxWindow::Layout virtual method. To
+ // properly forward calls to wxWindow::Layout use
+ // WX_FORWARD_TO_SCROLL_HELPER() derived class
+ bool ScrollLayout();
+
+#ifdef __WXMAC__
+ // queue mac window update after handling scroll event
+ virtual void UpdateMacScrollWindow() = 0;
+#endif // __WXMAC__
+
+ // change the target window
+ void DoSetTargetWindow(wxWindow *target);
+
+ // delete the event handler we installed
+ void DeleteEvtHandler();
+
+ // helper function abstracting the orientation test: with vertical
+ // orientation, it assigns the first value to x and the second one to y,
+ // with horizontal orientation it reverses them, i.e. the first value is
+ // assigned to y and the second one to x
+ void AssignOrient(wxCoord& x, wxCoord& y, wxCoord first, wxCoord second);
+
+ // similar to "oriented assignment" above but does "oriented increment":
+ // for vertical orientation, y is incremented by the given value and x if
+ // left unchanged, for horizontal orientation x is incremented
+ void IncOrient(wxCoord& x, wxCoord& y, wxCoord inc);
+
+private:
+
+ // the window that receives the scroll events and the window to actually
+ // scroll, respectively
+ wxWindow *m_win,
+ *m_targetWindow;
+
+ // the total number of (logical) units
+ size_t m_unitMax;
+
+ // the total (estimated) size
+ wxCoord m_sizeTotal;
+
+ // the first currently visible unit
+ size_t m_unitFirst;
+
+ // the number of currently visible units (including the last, possibly only
+ // partly, visible one)
+ size_t m_nUnitsVisible;
+
+ // accumulated mouse wheel rotation
+#if wxUSE_MOUSEWHEEL
+ int m_sumWheelRotation;
+#endif
+
+ // do child scrolling (used in DoPrepareDC())
+ bool m_physicalScrolling;
+
+ // handler injected into target window to forward some useful events to us
+ wxVarScrollHelperEvtHandler *m_handler;
+};
+
+
+
+// ===========================================================================
+// wxVarVScrollHelper
+// ===========================================================================
+
+// Provides public API functions targeted for vertical-specific scrolling,
+// wrapping the functionality of wxVarScrollHelperBase.
+
+class WXDLLEXPORT wxVarVScrollHelper : public wxVarScrollHelperBase
+{
+public:
+ // constructors and such
+ // ---------------------
+
+ // ctor must be given the associated window
+ wxVarVScrollHelper(wxWindow *winToScroll)
+ : wxVarScrollHelperBase(winToScroll)
+ {
+ }
+
+ // operators
+
+ void SetRowCount(size_t rowCount) { SetUnitCount(rowCount); }
+ bool ScrollToRow(size_t row) { return DoScrollToUnit(row); }
+
+ virtual bool ScrollRows(int rows)
+ { return DoScrollUnits(rows); }
+ virtual bool ScrollRowPages(int pages)
+ { return DoScrollPages(pages); }
+
+ virtual void RefreshRow(size_t row)
+ { RefreshUnit(row); }
+ virtual void RefreshRows(size_t from, size_t to)
+ { RefreshUnits(from, to); }
+
+ virtual int HitTest(wxCoord y) const
+ { return wxVarScrollHelperBase::HitTest(y); }
+
+ // accessors
+
+ size_t GetRowCount() const { return GetUnitCount(); }
+ size_t GetVisibleRowsBegin() const { return GetVisibleBegin(); }
+ size_t GetVisibleRowsEnd() const { return GetVisibleEnd(); }
+ bool IsRowVisible(size_t row) const { return IsVisible(row); }
+
+ virtual int GetOrientationTargetSize() const
+ { return GetTargetWindow()->GetClientSize().y; }
+ virtual int GetNonOrientationTargetSize() const
+ { return GetTargetWindow()->GetClientSize().x; }
+ virtual wxOrientation GetOrientation() const { return wxVERTICAL; }
+
+protected:
+ // this function must be overridden in the derived class and it should
+ // return the size of the given row in pixels
+ virtual wxCoord OnGetRowHeight(size_t n) const = 0;
+ wxCoord OnGetUnitSize(size_t n) const { return OnGetRowHeight(n); }
+
+ virtual void OnGetRowsHeightHint(size_t WXUNUSED(rowMin),
+ size_t WXUNUSED(rowMax)) const { }
+
+ // forward calls to OnGetRowsHeightHint()
+ virtual void OnGetUnitsSizeHint(size_t unitMin, size_t unitMax) const
+ { return OnGetRowsHeightHint(unitMin, unitMax); }
+
+ // again, if not overridden, it will fall back on default method
+ virtual wxCoord EstimateTotalHeight() const
+ { return DoEstimateTotalSize(); }
+
+ // forward calls to EstimateTotalHeight()
+ virtual wxCoord EstimateTotalSize() const { return EstimateTotalHeight(); }
+
+ wxCoord GetRowsHeight(size_t rowMin, size_t rowMax) const
+ { return GetUnitsSize(rowMin, rowMax); }
+};
+
+
+
+// ===========================================================================
+// wxVarHScrollHelper
+// ===========================================================================
+
+// Provides public API functions targeted for horizontal-specific scrolling,
+// wrapping the functionality of wxVarScrollHelperBase.
+
+class WXDLLEXPORT wxVarHScrollHelper : public wxVarScrollHelperBase
+{
+public:
+ // constructors and such
+ // ---------------------
+
+ // ctor must be given the associated window
+ wxVarHScrollHelper(wxWindow *winToScroll)
+ : wxVarScrollHelperBase(winToScroll)
+ {
+ }
+
+ // operators
+
+ void SetColumnCount(size_t columnCount)
+ { SetUnitCount(columnCount); }
+
+ bool ScrollToColumn(size_t column)
+ { return DoScrollToUnit(column); }
+ virtual bool ScrollColumns(int columns)
+ { return DoScrollUnits(columns); }
+ virtual bool ScrollColumnPages(int pages)
+ { return DoScrollPages(pages); }
+
+ virtual void RefreshColumn(size_t column)
+ { RefreshUnit(column); }
+ virtual void RefreshColumns(size_t from, size_t to)
+ { RefreshUnits(from, to); }
+ virtual int HitTest(wxCoord x) const
+ { return wxVarScrollHelperBase::HitTest(x); }
+
+ // accessors
+
+ size_t GetColumnCount() const
+ { return GetUnitCount(); }
+ size_t GetVisibleColumnsBegin() const
+ { return GetVisibleBegin(); }
+ size_t GetVisibleColumnsEnd() const
+ { return GetVisibleEnd(); }
+ bool IsColumnVisible(size_t column) const
+ { return IsVisible(column); }
+
+
+ virtual int GetOrientationTargetSize() const
+ { return GetTargetWindow()->GetClientSize().x; }
+ virtual int GetNonOrientationTargetSize() const
+ { return GetTargetWindow()->GetClientSize().y; }
+ virtual wxOrientation GetOrientation() const { return wxHORIZONTAL; }
+
+protected:
+ // this function must be overridden in the derived class and it should
+ // return the size of the given column in pixels
+ virtual wxCoord OnGetColumnWidth(size_t n) const = 0;
+ wxCoord OnGetUnitSize(size_t n) const { return OnGetColumnWidth(n); }
+
+ virtual void OnGetColumnsWidthHint(size_t WXUNUSED(columnMin),
+ size_t WXUNUSED(columnMax)) const
+ { }
+
+ // forward calls to OnGetColumnsWidthHint()
+ virtual void OnGetUnitsSizeHint(size_t unitMin, size_t unitMax) const
+ { return OnGetColumnsWidthHint(unitMin, unitMax); }
+
+ // again, if not overridden, it will fall back on default method
+ virtual wxCoord EstimateTotalWidth() const { return DoEstimateTotalSize(); }
+
+ // forward calls to EstimateTotalWidth()
+ virtual wxCoord EstimateTotalSize() const { return EstimateTotalWidth(); }
+
+ wxCoord GetColumnsWidth(size_t columnMin, size_t columnMax) const
+ { return GetUnitsSize(columnMin, columnMax); }
+};
+
+
+
+// ===========================================================================
+// wxVarHVScrollHelper
+// ===========================================================================
+
+// Provides public API functions targeted at functions with similar names in
+// both wxVScrollHelper and wxHScrollHelper so class scope doesn't need to be
+// specified (since we are using multiple inheritance). It also provides
+// functions to make changing values for both orientations at the same time
+// easier.
+
+class WXDLLEXPORT wxVarHVScrollHelper : public wxVarVScrollHelper,
+ public wxVarHScrollHelper
+{
+public:
+ // constructors and such
+ // ---------------------
+
+ // ctor must be given the associated window
+ wxVarHVScrollHelper(wxWindow *winToScroll)
+ : wxVarVScrollHelper(winToScroll), wxVarHScrollHelper(winToScroll) { }
+
+ // operators
+ // ---------
+
+ // set the number of units the window contains for each axis: the derived
+ // class must provide the widths and heights for all units with indices up
+ // to each of the one given here in its OnGetColumnWidth() and
+ // OnGetRowHeight()
+ void SetRowColumnCount(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 laid out
+ // properly, and the contents of the window (pixels) are actually moved
+ void EnablePhysicalScrolling(bool vscrolling = true, bool hscrolling = true)
+ {
+ wxVarVScrollHelper::EnablePhysicalScrolling(vscrolling);
+ wxVarHScrollHelper::EnablePhysicalScrolling(hscrolling);
+ }
+
+ // scroll to the specified row/column: it will become the first visible
+ // cell in the window
+ //
+ // return true if we scrolled the window, false if nothing was done
+ bool ScrollToRowColumn(size_t row, size_t column);
+ bool ScrollToRowColumn(const wxPosition &pos)
+ { return ScrollToRowColumn(pos.GetRow(), pos.GetColumn()); }
+
+ // redraw the specified cell
+ virtual void RefreshRowColumn(size_t row, size_t column);
+ virtual void RefreshRowColumn(const wxPosition &pos)
+ { RefreshRowColumn(pos.GetRow(), pos.GetColumn()); }
+
+ // redraw the specified regions (inclusive). If the target window for
+ // both orientations is the same the rectangle of cells is refreshed; if
+ // the target windows differ the entire client size opposite the
+ // orientation direction is refreshed between the specified limits
+ virtual void RefreshRowsColumns(size_t fromRow, size_t toRow,
+ size_t fromColumn, size_t toColumn);
+ virtual void RefreshRowsColumns(const wxPosition& from,
+ const wxPosition& to)
+ {
+ RefreshRowsColumns(from.GetRow(), to.GetRow(),
+ from.GetColumn(), to.GetColumn());
+ }
+
+ // Override wxPanel::HitTest to use our version
+ virtual wxPosition HitTest(wxCoord x, wxCoord y) const;
+ virtual wxPosition HitTest(const wxPoint &pos) const
+ { return HitTest(pos.x, pos.y); }
+
+ // change the DC origin according to the scroll position. To properly
+ // forward calls to wxWindow::Layout use WX_FORWARD_TO_SCROLL_HELPER()
+ // derived class. We use this version to call both base classes'
+ // DoPrepareDC()
+ virtual void DoPrepareDC(wxDC& dc);
+
+ // replacement implementation of wxWindow::Layout virtual method. To
+ // properly forward calls to wxWindow::Layout use
+ // WX_FORWARD_TO_SCROLL_HELPER() derived class. We use this version to
+ // call both base classes' ScrollLayout()
+ bool ScrollLayout();
+
+ // accessors
+ // ---------
+
+ // get the number of units this window contains (previously set by
+ // Set[Column/Row/RowColumn/Unit]Count())
+ wxSize GetRowColumnCount() const;
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