/////////////////////////////////////////////////////////////////////////////// // Name: wx/univ/scrolbar.h // Purpose: wxScrollBar for wxUniversal // Author: Vadim Zeitlin // Modified by: // Created: 20.08.00 // RCS-ID: $Id$ // Copyright: (c) 2000 Vadim Zeitlin // Licence: wxWindows license /////////////////////////////////////////////////////////////////////////////// #ifndef _WX_UNIV_SCROLBAR_H_ #define _WX_UNIV_SCROLBAR_H_ #ifdef __GNUG__ #pragma interface "univscrolbar.h" #endif class WXDLLEXPORT wxScrollTimer; #include "wx/univ/scrarrow.h" // ---------------------------------------------------------------------------- // the actions supported by this control // ---------------------------------------------------------------------------- // scroll the bar #define wxACTION_SCROLL_START _T("start") // to the beginning #define wxACTION_SCROLL_END _T("end") // to the end #define wxACTION_SCROLL_LINE_UP _T("lineup") // one line up/left #define wxACTION_SCROLL_PAGE_UP _T("pageup") // one page up/left #define wxACTION_SCROLL_LINE_DOWN _T("linedown") // one line down/right #define wxACTION_SCROLL_PAGE_DOWN _T("pagedown") // one page down/right // the scrollbar thumb may be dragged #define wxACTION_SCROLL_THUMB_DRAG _T("thumbdrag") #define wxACTION_SCROLL_THUMB_MOVE _T("thumbmove") #define wxACTION_SCROLL_THUMB_RELEASE _T("thumbrelease") // ---------------------------------------------------------------------------- // wxScrollBar // ---------------------------------------------------------------------------- class WXDLLEXPORT wxScrollBar : public wxScrollBarBase, public wxControlWithArrows { public: // scrollbar elements: they correspond to wxHT_SCROLLBAR_XXX constants but // start from 0 which allows to use them as array indices enum Element { Element_Arrow_Line_1, Element_Arrow_Line_2, Element_Arrow_Page_1, Element_Arrow_Page_2, Element_Thumb, Element_Bar_1, Element_Bar_2, Element_Max }; wxScrollBar(); wxScrollBar(wxWindow *parent, wxWindowID id, const wxPoint& pos = wxDefaultPosition, const wxSize& size = wxDefaultSize, long style = wxSB_HORIZONTAL, const wxValidator& validator = wxDefaultValidator, const wxString& name = wxScrollBarNameStr); bool Create(wxWindow *parent, wxWindowID id, const wxPoint& pos = wxDefaultPosition, const wxSize& size = wxDefaultSize, long style = wxSB_HORIZONTAL, const wxValidator& validator = wxDefaultValidator, const wxString& name = wxScrollBarNameStr); virtual ~wxScrollBar(); // implement base class pure virtuals virtual int GetThumbPosition() const; virtual int GetThumbSize() const; virtual int GetPageSize() const; virtual int GetRange() const; virtual void SetThumbPosition(int thumbPos); virtual void SetScrollbar(int position, int thumbSize, int range, int pageSize, bool refresh = TRUE); // wxScrollBar actions void ScrollToStart(); void ScrollToEnd(); void ScrollLines(int nLines); void ScrollPages(int nPages); virtual bool PerformAction(const wxControlAction& action, long numArg = 0, const wxString& strArg = wxEmptyString); // wxScrollBar sub elements state (combination of wxCONTROL_XXX) void SetState(Element which, int flags); int GetState(Element which) const; // implement wxControlWithArrows methods virtual wxRenderer *GetRenderer() const { return m_renderer; } virtual wxWindow *GetWindow() { return this; } virtual bool IsVertical() const { return wxScrollBarBase::IsVertical(); } virtual int GetArrowState(wxScrollArrows::Arrow arrow) const; virtual void SetArrowFlag(wxScrollArrows::Arrow arrow, int flag, bool set); virtual bool OnArrow(wxScrollArrows::Arrow arrow); virtual wxScrollArrows::Arrow HitTest(const wxPoint& pt) const; // for wxControlRenderer::DrawScrollbar() only const wxScrollArrows& GetArrows() const { return m_arrows; } protected: virtual wxSize DoGetBestClientSize() const; virtual void DoDraw(wxControlRenderer *renderer); virtual wxBorder GetDefaultBorder() const { return wxBORDER_NONE; } // event handlers void OnIdle(wxIdleEvent& event); // SetThumbPosition() helper void DoSetThumb(int thumbPos); // common part of all ctors void Init(); private: // total range of the scrollbar in logical units int m_range; // the current and previous (after last refresh - this is used for // repainting optimisation) size of the thumb in logical units (from 0 to // m_range) and its position (from 0 to m_range - m_thumbSize) int m_thumbSize, m_thumbPos, m_thumbPosOld; // the page size, i.e. the number of lines by which to scroll when page // up/down action is performed int m_pageSize; // the state of the sub elements int m_elementsState[Element_Max]; // the dirty flag: if set, scrollbar must be updated bool m_dirty; // the object handling the arrows wxScrollArrows m_arrows; DECLARE_EVENT_TABLE() DECLARE_DYNAMIC_CLASS(wxScrollBar) }; // ---------------------------------------------------------------------------- // common scrollbar input handler: it manages clicks on the standard scrollbar // elements (line arrows, bar, thumb) // ---------------------------------------------------------------------------- class WXDLLEXPORT wxStdScrollBarInputHandler : public wxStdInputHandler { public: // constructor takes a renderer (used for scrollbar hit testing) and the // base handler to which all unhandled events are forwarded wxStdScrollBarInputHandler(wxRenderer *renderer, wxInputHandler *inphand); virtual bool HandleKey(wxControl *control, const wxKeyEvent& event, bool pressed); virtual bool HandleMouse(wxControl *control, const wxMouseEvent& event); virtual bool HandleMouseMove(wxControl *control, const wxMouseEvent& event); virtual ~wxStdScrollBarInputHandler(); // this method is called by wxScrollBarTimer only and may be overridden // // return TRUE to continue scrolling, FALSE to stop the timer virtual bool OnScrollTimer(wxScrollBar *scrollbar, const wxControlAction& action); protected: // the methods which must be overridden in the derived class // return TRUE if the mouse button can be used to activate scrollbar, FALSE // if not (only left mouse button can do it under Windows, any button under // GTK+) virtual bool IsAllowedButton(int button) = 0; // set or clear the specified flag on the scrollbar element corresponding // to m_htLast void SetElementState(wxScrollBar *scrollbar, int flag, bool doIt); // [un]highlight the scrollbar element corresponding to m_htLast virtual void Highlight(wxScrollBar *scrollbar, bool doIt) { SetElementState(scrollbar, wxCONTROL_CURRENT, doIt); } // [un]press the scrollbar element corresponding to m_htLast virtual void Press(wxScrollBar *scrollbar, bool doIt) { SetElementState(scrollbar, wxCONTROL_PRESSED, doIt); } // stop scrolling because we reached the end point void StopScrolling(wxScrollBar *scrollbar); // get the mouse coordinates in the scrollbar direction from the event wxCoord GetMouseCoord(const wxScrollBar *scrollbar, const wxMouseEvent& event) const; // generate a "thumb move" action for this mouse event void HandleThumbMove(wxScrollBar *scrollbar, const wxMouseEvent& event); // the window (scrollbar) which has capture or NULL and the flag telling if // the mouse is inside the element which captured it or not wxWindow *m_winCapture; bool m_winHasMouse; int m_btnCapture; // the mouse button which has captured mouse // the position where we started scrolling by page wxPoint m_ptStartScrolling; // one of wxHT_SCROLLBAR_XXX value: where has the mouse been last time? wxHitTest m_htLast; // the renderer (we use it only for hit testing) wxRenderer *m_renderer; // the offset of the top/left of the scrollbar relative to the mouse to // keep during the thumb drag int m_ofsMouse; // the timer for generating scroll events when the mouse stays pressed on // a scrollbar wxScrollTimer *m_timerScroll; }; #endif // _WX_UNIV_SCROLBAR_H_