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wxWidgets/include/wx/univ/scrolbar.h
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283
wxWidgets/include/wx/univ/scrolbar.h
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///////////////////////////////////////////////////////////////////////////////
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// Name: wx/univ/scrolbar.h
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// Purpose: wxScrollBar for wxUniversal
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 20.08.00
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// RCS-ID: $Id: scrolbar.h 61872 2009-09-09 22:37:05Z VZ $
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// Copyright: (c) 2000 SciTech Software, Inc. (www.scitechsoft.com)
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_UNIV_SCROLBAR_H_
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#define _WX_UNIV_SCROLBAR_H_
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class WXDLLEXPORT wxScrollTimer;
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#include "wx/univ/scrarrow.h"
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#include "wx/renderer.h"
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// ----------------------------------------------------------------------------
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// the actions supported by this control
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// ----------------------------------------------------------------------------
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// scroll the bar
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#define wxACTION_SCROLL_START wxT("start") // to the beginning
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#define wxACTION_SCROLL_END wxT("end") // to the end
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#define wxACTION_SCROLL_LINE_UP wxT("lineup") // one line up/left
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#define wxACTION_SCROLL_PAGE_UP wxT("pageup") // one page up/left
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#define wxACTION_SCROLL_LINE_DOWN wxT("linedown") // one line down/right
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#define wxACTION_SCROLL_PAGE_DOWN wxT("pagedown") // one page down/right
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// the scrollbar thumb may be dragged
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#define wxACTION_SCROLL_THUMB_DRAG wxT("thumbdrag")
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#define wxACTION_SCROLL_THUMB_MOVE wxT("thumbmove")
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#define wxACTION_SCROLL_THUMB_RELEASE wxT("thumbrelease")
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// ----------------------------------------------------------------------------
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// wxScrollBar
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// ----------------------------------------------------------------------------
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class WXDLLEXPORT wxScrollBar : public wxScrollBarBase,
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public wxControlWithArrows
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{
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public:
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// scrollbar elements: they correspond to wxHT_SCROLLBAR_XXX constants but
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// start from 0 which allows to use them as array indices
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enum Element
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{
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Element_Arrow_Line_1,
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Element_Arrow_Line_2,
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Element_Arrow_Page_1,
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Element_Arrow_Page_2,
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Element_Thumb,
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Element_Bar_1,
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Element_Bar_2,
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Element_Max
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};
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wxScrollBar();
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wxScrollBar(wxWindow *parent,
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wxWindowID id,
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const wxPoint& pos = wxDefaultPosition,
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const wxSize& size = wxDefaultSize,
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long style = wxSB_HORIZONTAL,
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const wxValidator& validator = wxDefaultValidator,
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const wxString& name = wxScrollBarNameStr);
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bool Create(wxWindow *parent,
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wxWindowID id,
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const wxPoint& pos = wxDefaultPosition,
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const wxSize& size = wxDefaultSize,
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long style = wxSB_HORIZONTAL,
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const wxValidator& validator = wxDefaultValidator,
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const wxString& name = wxScrollBarNameStr);
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virtual ~wxScrollBar();
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// implement base class pure virtuals
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virtual int GetThumbPosition() const;
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virtual int GetThumbSize() const;
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virtual int GetPageSize() const;
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virtual int GetRange() const;
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virtual void SetThumbPosition(int thumbPos);
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virtual void SetScrollbar(int position, int thumbSize,
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int range, int pageSize,
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bool refresh = true);
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// wxScrollBar actions
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void ScrollToStart();
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void ScrollToEnd();
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bool ScrollLines(int nLines);
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bool ScrollPages(int nPages);
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virtual bool PerformAction(const wxControlAction& action,
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long numArg = 0,
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const wxString& strArg = wxEmptyString);
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static wxInputHandler *GetStdInputHandler(wxInputHandler *handlerDef);
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virtual wxInputHandler *DoGetStdInputHandler(wxInputHandler *handlerDef)
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{
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return GetStdInputHandler(handlerDef);
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}
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// scrollbars around a normal window should not receive the focus
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virtual bool AcceptsFocus() const;
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// wxScrollBar sub elements state (combination of wxCONTROL_XXX)
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void SetState(Element which, int flags);
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int GetState(Element which) const;
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// implement wxControlWithArrows methods
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virtual wxRenderer *GetRenderer() const { return m_renderer; }
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virtual wxWindow *GetWindow() { return this; }
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virtual bool IsVertical() const { return wxScrollBarBase::IsVertical(); }
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virtual int GetArrowState(wxScrollArrows::Arrow arrow) const;
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virtual void SetArrowFlag(wxScrollArrows::Arrow arrow, int flag, bool set);
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virtual bool OnArrow(wxScrollArrows::Arrow arrow);
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virtual wxScrollArrows::Arrow HitTestArrow(const wxPoint& pt) const;
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// for wxControlRenderer::DrawScrollbar() only
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const wxScrollArrows& GetArrows() const { return m_arrows; }
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// returns one of wxHT_SCROLLBAR_XXX constants
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wxHitTest HitTestBar(const wxPoint& pt) const;
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// idle processing
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virtual void OnInternalIdle();
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protected:
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virtual wxSize DoGetBestClientSize() const;
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virtual void DoDraw(wxControlRenderer *renderer);
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virtual wxBorder GetDefaultBorder() const { return wxBORDER_NONE; }
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// forces update of thumb's visual appearence (does nothing if m_dirty=false)
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void UpdateThumb();
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// SetThumbPosition() helper
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void DoSetThumb(int thumbPos);
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// common part of all ctors
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void Init();
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// is this scrollbar attached to a window or a standalone control?
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bool IsStandalone() const;
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// scrollbar geometry methods:
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// gets the bounding box for a scrollbar element for the given (by default
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// - current) thumb position
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wxRect GetScrollbarRect(wxScrollBar::Element elem, int thumbPos = -1) const;
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// returns the size of the scrollbar shaft excluding the arrows
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wxCoord GetScrollbarSize() const;
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// translate the scrollbar position (in logical units) into physical
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// coordinate (in pixels) and the other way round
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wxCoord ScrollbarToPixel(int thumbPos = -1);
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int PixelToScrollbar(wxCoord coord);
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// return the starting and ending positions, in pixels, of the thumb of a
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// scrollbar with the given logical position, thumb size and range and the
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// given physical length
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static void GetScrollBarThumbSize(wxCoord length,
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int thumbPos,
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int thumbSize,
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int range,
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wxCoord *thumbStart,
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wxCoord *thumbEnd);
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private:
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// total range of the scrollbar in logical units
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int m_range;
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// the current and previous (after last refresh - this is used for
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// repainting optimisation) size of the thumb in logical units (from 0 to
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// m_range) and its position (from 0 to m_range - m_thumbSize)
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int m_thumbSize,
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m_thumbPos,
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m_thumbPosOld;
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// the page size, i.e. the number of lines by which to scroll when page
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// up/down action is performed
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int m_pageSize;
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// the state of the sub elements
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int m_elementsState[Element_Max];
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// the dirty flag: if set, scrollbar must be updated
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bool m_dirty;
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// the object handling the arrows
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wxScrollArrows m_arrows;
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friend WXDLLEXPORT class wxControlRenderer; // for geometry methods
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friend class wxStdScrollBarInputHandler; // for geometry methods
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DECLARE_EVENT_TABLE()
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DECLARE_DYNAMIC_CLASS(wxScrollBar)
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};
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// ----------------------------------------------------------------------------
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// Standard scrollbar input handler which can be used as a base class
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// ----------------------------------------------------------------------------
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class WXDLLEXPORT wxStdScrollBarInputHandler : public wxStdInputHandler
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{
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public:
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// constructor takes a renderer (used for scrollbar hit testing) and the
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// base handler to which all unhandled events are forwarded
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wxStdScrollBarInputHandler(wxRenderer *renderer,
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wxInputHandler *inphand);
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virtual bool HandleKey(wxInputConsumer *consumer,
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const wxKeyEvent& event,
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bool pressed);
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virtual bool HandleMouse(wxInputConsumer *consumer,
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const wxMouseEvent& event);
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virtual bool HandleMouseMove(wxInputConsumer *consumer, const wxMouseEvent& event);
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virtual ~wxStdScrollBarInputHandler();
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// this method is called by wxScrollBarTimer only and may be overridden
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//
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// return true to continue scrolling, false to stop the timer
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virtual bool OnScrollTimer(wxScrollBar *scrollbar,
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const wxControlAction& action);
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protected:
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// return true if the mouse button can be used to activate scrollbar, false
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// if not (any button under GTK+ unlike left button only which is default)
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virtual bool IsAllowedButton(int button) const
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{ return button == wxMOUSE_BTN_LEFT; }
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// set or clear the specified flag on the scrollbar element corresponding
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// to m_htLast
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void SetElementState(wxScrollBar *scrollbar, int flag, bool doIt);
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// [un]highlight the scrollbar element corresponding to m_htLast
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virtual void Highlight(wxScrollBar *scrollbar, bool doIt)
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{ SetElementState(scrollbar, wxCONTROL_CURRENT, doIt); }
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// [un]press the scrollbar element corresponding to m_htLast
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virtual void Press(wxScrollBar *scrollbar, bool doIt)
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{ SetElementState(scrollbar, wxCONTROL_PRESSED, doIt); }
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// stop scrolling because we reached the end point
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void StopScrolling(wxScrollBar *scrollbar);
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// get the mouse coordinates in the scrollbar direction from the event
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wxCoord GetMouseCoord(const wxScrollBar *scrollbar,
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const wxMouseEvent& event) const;
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// generate a "thumb move" action for this mouse event
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void HandleThumbMove(wxScrollBar *scrollbar, const wxMouseEvent& event);
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// the window (scrollbar) which has capture or NULL and the flag telling if
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// the mouse is inside the element which captured it or not
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wxWindow *m_winCapture;
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bool m_winHasMouse;
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int m_btnCapture; // the mouse button which has captured mouse
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// the position where we started scrolling by page
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wxPoint m_ptStartScrolling;
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// one of wxHT_SCROLLBAR_XXX value: where has the mouse been last time?
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wxHitTest m_htLast;
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// the renderer (we use it only for hit testing)
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wxRenderer *m_renderer;
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// the offset of the top/left of the scrollbar relative to the mouse to
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// keep during the thumb drag
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int m_ofsMouse;
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// the timer for generating scroll events when the mouse stays pressed on
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// a scrollbar
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wxScrollTimer *m_timerScroll;
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};
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#endif // _WX_UNIV_SCROLBAR_H_
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