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314
wxWidgets/include/wx/scrolwin.h
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314
wxWidgets/include/wx/scrolwin.h
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/////////////////////////////////////////////////////////////////////////////
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// Name: include/wx/scrolwin.h
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// Purpose: wxScrolledWindow, wxScrolledControl and wxScrollHelper
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 30.08.00
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// RCS-ID: $Id: scrolwin.h 50864 2007-12-20 18:36:19Z VS $
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// Copyright: (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_SCROLWIN_H_BASE_
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#define _WX_SCROLWIN_H_BASE_
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#include "wx/panel.h"
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class WXDLLIMPEXP_FWD_CORE wxScrollHelperEvtHandler;
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class WXDLLIMPEXP_FWD_CORE wxTimer;
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// default scrolled window style: scroll in both directions
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#define wxScrolledWindowStyle (wxHSCROLL | wxVSCROLL)
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// ----------------------------------------------------------------------------
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// The hierarchy of scrolling classes is a bit complicated because we want to
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// put as much functionality as possible in a mix-in class not deriving from
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// wxWindow so that other classes could derive from the same base class on all
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// platforms irrespectively of whether they are native controls (and hence
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// don't use our scrolling) or not.
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//
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// So we have
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//
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// wxScrollHelper
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// |
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// |
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// \|/
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// wxWindow wxScrollHelperNative
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// | \ / /
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// | \ / /
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// | _| |_ /
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// | wxScrolledWindow /
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// | /
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// \|/ /
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// wxControl /
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// \ /
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// \ /
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// _| |_
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// wxScrolledControl
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//
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// ----------------------------------------------------------------------------
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class WXDLLEXPORT wxScrollHelper
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{
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public:
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// ctor must be given the associated window
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wxScrollHelper(wxWindow *winToScroll);
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virtual ~wxScrollHelper();
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// configure the scrolling
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virtual void SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,
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int noUnitsX, int noUnitsY,
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int xPos = 0, int yPos = 0,
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bool noRefresh = false );
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// scroll to the given (in logical coords) position
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virtual void Scroll(int x, int y);
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// get/set the page size for this orientation (wxVERTICAL/wxHORIZONTAL)
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int GetScrollPageSize(int orient) const;
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void SetScrollPageSize(int orient, int pageSize);
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// get the number of lines the window can scroll,
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// returns 0 if no scrollbars are there.
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int GetScrollLines( int orient ) const;
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// Set the x, y scrolling increments.
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void SetScrollRate( int xstep, int ystep );
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// get the size of one logical unit in physical ones
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virtual void GetScrollPixelsPerUnit(int *pixelsPerUnitX,
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int *pixelsPerUnitY) const;
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// Enable/disable Windows scrolling in either direction. If true, wxWidgets
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// scrolls the canvas and only a bit of the canvas is invalidated; no
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// Clear() is necessary. If false, the whole canvas is invalidated and a
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// Clear() is necessary. Disable for when the scroll increment is used to
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// actually scroll a non-constant distance
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virtual void EnableScrolling(bool x_scrolling, bool y_scrolling);
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// Get the view start
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virtual void GetViewStart(int *x, int *y) const;
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// Set the scale factor, used in PrepareDC
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void SetScale(double xs, double ys) { m_scaleX = xs; m_scaleY = ys; }
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double GetScaleX() const { return m_scaleX; }
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double GetScaleY() const { return m_scaleY; }
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// translate between scrolled and unscrolled coordinates
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void CalcScrolledPosition(int x, int y, int *xx, int *yy) const
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{ DoCalcScrolledPosition(x, y, xx, yy); }
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wxPoint CalcScrolledPosition(const wxPoint& pt) const
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{
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wxPoint p2;
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DoCalcScrolledPosition(pt.x, pt.y, &p2.x, &p2.y);
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return p2;
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}
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void CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
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{ DoCalcUnscrolledPosition(x, y, xx, yy); }
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wxPoint CalcUnscrolledPosition(const wxPoint& pt) const
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{
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wxPoint p2;
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DoCalcUnscrolledPosition(pt.x, pt.y, &p2.x, &p2.y);
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return p2;
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}
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virtual void DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const;
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virtual void DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const;
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// Adjust the scrollbars
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virtual void AdjustScrollbars(void);
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// Calculate scroll increment
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virtual int CalcScrollInc(wxScrollWinEvent& event);
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// Normally the wxScrolledWindow will scroll itself, but in some rare
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// occasions you might want it to scroll [part of] another window (e.g. a
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// child of it in order to scroll only a portion the area between the
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// scrollbars (spreadsheet: only cell area will move).
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virtual void SetTargetWindow(wxWindow *target);
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virtual wxWindow *GetTargetWindow() const;
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void SetTargetRect(const wxRect& rect) { m_rectToScroll = rect; }
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wxRect GetTargetRect() const { return m_rectToScroll; }
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// Override this function to draw the graphic (or just process EVT_PAINT)
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virtual void OnDraw(wxDC& WXUNUSED(dc)) { }
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// change the DC origin according to the scroll position.
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virtual void DoPrepareDC(wxDC& dc);
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// are we generating the autoscroll events?
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bool IsAutoScrolling() const { return m_timerAutoScroll != NULL; }
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// stop generating the scroll events when mouse is held outside the window
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void StopAutoScrolling();
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// this method can be overridden in a derived class to forbid sending the
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// auto scroll events - note that unlike StopAutoScrolling() it doesn't
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// stop the timer, so it will be called repeatedly and will typically
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// return different values depending on the current mouse position
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//
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// the base class version just returns true
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virtual bool SendAutoScrollEvents(wxScrollWinEvent& event) const;
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// the methods to be called from the window event handlers
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void HandleOnScroll(wxScrollWinEvent& event);
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void HandleOnSize(wxSizeEvent& event);
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void HandleOnPaint(wxPaintEvent& event);
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void HandleOnChar(wxKeyEvent& event);
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void HandleOnMouseEnter(wxMouseEvent& event);
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void HandleOnMouseLeave(wxMouseEvent& event);
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#if wxUSE_MOUSEWHEEL
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void HandleOnMouseWheel(wxMouseEvent& event);
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#endif // wxUSE_MOUSEWHEEL
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#if wxABI_VERSION >= 20808
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void HandleOnChildFocus(wxChildFocusEvent& event);
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#endif
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// FIXME: this is needed for now for wxPlot compilation, should be removed
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// once it is fixed!
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void OnScroll(wxScrollWinEvent& event) { HandleOnScroll(event); }
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protected:
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// get pointer to our scroll rect if we use it or NULL
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const wxRect *GetScrollRect() const
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{
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return m_rectToScroll.width != 0 ? &m_rectToScroll : NULL;
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}
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// get the size of the target window
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wxSize GetTargetSize() const
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{
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return m_rectToScroll.width != 0 ? m_rectToScroll.GetSize()
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: m_targetWindow->GetClientSize();
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}
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void GetTargetSize(int *w, int *h) const
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{
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wxSize size = GetTargetSize();
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if ( w )
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*w = size.x;
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if ( h )
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*h = size.y;
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}
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// implementations of various wxWindow virtual methods which should be
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// forwarded to us (this can be done by WX_FORWARD_TO_SCROLL_HELPER())
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bool ScrollLayout();
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void ScrollDoSetVirtualSize(int x, int y);
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wxSize ScrollGetBestVirtualSize() const;
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wxSize ScrollGetWindowSizeForVirtualSize(const wxSize& size) const;
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// change just the target window (unlike SetWindow which changes m_win as
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// well)
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void DoSetTargetWindow(wxWindow *target);
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// delete the event handler we installed
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void DeleteEvtHandler();
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double m_scaleX;
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double m_scaleY;
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wxWindow *m_win,
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*m_targetWindow;
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wxRect m_rectToScroll;
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wxTimer *m_timerAutoScroll;
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int m_xScrollPixelsPerLine;
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int m_yScrollPixelsPerLine;
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int m_xScrollPosition;
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int m_yScrollPosition;
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int m_xScrollLines;
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int m_yScrollLines;
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int m_xScrollLinesPerPage;
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int m_yScrollLinesPerPage;
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bool m_xScrollingEnabled;
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bool m_yScrollingEnabled;
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#if wxUSE_MOUSEWHEEL
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int m_wheelRotation;
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#endif // wxUSE_MOUSEWHEEL
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wxScrollHelperEvtHandler *m_handler;
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DECLARE_NO_COPY_CLASS(wxScrollHelper)
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};
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// this macro can be used in a wxScrollHelper-derived class to forward wxWindow
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// methods to corresponding wxScrollHelper methods
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#define WX_FORWARD_TO_SCROLL_HELPER() \
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public: \
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virtual void PrepareDC(wxDC& dc) { DoPrepareDC(dc); } \
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virtual bool Layout() { return ScrollLayout(); } \
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virtual void DoSetVirtualSize(int x, int y) \
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{ ScrollDoSetVirtualSize(x, y); } \
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virtual wxSize GetBestVirtualSize() const \
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{ return ScrollGetBestVirtualSize(); } \
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protected: \
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virtual wxSize GetWindowSizeForVirtualSize(const wxSize& size) const \
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{ return ScrollGetWindowSizeForVirtualSize(size); }
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// include the declaration of wxScrollHelperNative if needed
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#if defined(__WXGTK20__) && !defined(__WXUNIVERSAL__)
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#include "wx/gtk/scrolwin.h"
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#elif defined(__WXGTK__) && !defined(__WXUNIVERSAL__)
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#include "wx/gtk1/scrolwin.h"
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#else
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typedef wxScrollHelper wxScrollHelperNative;
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#endif
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// ----------------------------------------------------------------------------
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// wxScrolledWindow: a wxWindow which knows how to scroll
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// ----------------------------------------------------------------------------
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class WXDLLEXPORT wxScrolledWindow : public wxPanel,
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public wxScrollHelperNative
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{
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public:
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wxScrolledWindow() : wxScrollHelperNative(this) { }
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wxScrolledWindow(wxWindow *parent,
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wxWindowID winid = wxID_ANY,
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const wxPoint& pos = wxDefaultPosition,
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const wxSize& size = wxDefaultSize,
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long style = wxScrolledWindowStyle,
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const wxString& name = wxPanelNameStr)
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: wxScrollHelperNative(this)
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{
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Create(parent, winid, pos, size, style, name);
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}
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virtual ~wxScrolledWindow();
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bool Create(wxWindow *parent,
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wxWindowID winid,
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const wxPoint& pos = wxDefaultPosition,
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const wxSize& size = wxDefaultSize,
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long style = wxScrolledWindowStyle,
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const wxString& name = wxPanelNameStr);
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// we need to return a special WM_GETDLGCODE value to process just the
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// arrows but let the other navigation characters through
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#ifdef __WXMSW__
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virtual WXLRESULT MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam);
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#endif // __WXMSW__
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WX_FORWARD_TO_SCROLL_HELPER()
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protected:
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// this is needed for wxEVT_PAINT processing hack described in
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// wxScrollHelperEvtHandler::ProcessEvent()
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void OnPaint(wxPaintEvent& event);
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private:
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DECLARE_DYNAMIC_CLASS_NO_COPY(wxScrolledWindow)
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DECLARE_EVENT_TABLE()
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};
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#endif // _WX_SCROLWIN_H_BASE_
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