/////////////////////////////////////////////////////////////////////////////// // Name: wx/univ/scrolbar.h // Purpose: wxScrollBar for wxUniversal // Author: Vadim Zeitlin // Modified by: // Created: 20.08.00 // Copyright: (c) 2000 SciTech Software, Inc. (www.scitechsoft.com) // Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// #ifndef _WX_UNIV_SCROLBAR_H_ #define _WX_UNIV_SCROLBAR_H_ class WXDLLIMPEXP_FWD_CORE wxScrollTimer; #include "wx/univ/scrarrow.h" #include "wx/renderer.h" // ---------------------------------------------------------------------------- // the actions supported by this control // ---------------------------------------------------------------------------- // scroll the bar #define wxACTION_SCROLL_START wxT("start") // to the beginning #define wxACTION_SCROLL_END wxT("end") // to the end #define wxACTION_SCROLL_LINE_UP wxT("lineup") // one line up/left #define wxACTION_SCROLL_PAGE_UP wxT("pageup") // one page up/left #define wxACTION_SCROLL_LINE_DOWN wxT("linedown") // one line down/right #define wxACTION_SCROLL_PAGE_DOWN wxT("pagedown") // one page down/right // the scrollbar thumb may be dragged #define wxACTION_SCROLL_THUMB_DRAG wxT("thumbdrag") #define wxACTION_SCROLL_THUMB_MOVE wxT("thumbmove") #define wxACTION_SCROLL_THUMB_RELEASE wxT("thumbrelease") // ---------------------------------------------------------------------------- // wxScrollBar // ---------------------------------------------------------------------------- class WXDLLIMPEXP_CORE 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(); bool ScrollLines(int nLines); bool ScrollPages(int nPages); virtual bool PerformAction(const wxControlAction& action, long numArg = 0, const wxString& strArg = wxEmptyString); static wxInputHandler *GetStdInputHandler(wxInputHandler *handlerDef); virtual wxInputHandler *DoGetStdInputHandler(wxInputHandler *handlerDef) { return GetStdInputHandler(handlerDef); } // scrollbars around a normal window should not receive the focus virtual bool AcceptsFocus() const; // 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 HitTestArrow(const wxPoint& pt) const; // for wxControlRenderer::DrawScrollbar() only const wxScrollArrows& GetArrows() const { return m_arrows; } // returns one of wxHT_SCROLLBAR_XXX constants wxHitTest HitTestBar(const wxPoint& pt) const; // idle processing virtual void OnInternalIdle(); protected: virtual wxSize DoGetBestClientSize() const; virtual void DoDraw(wxControlRenderer *renderer); virtual wxBorder GetDefaultBorder() const { return wxBORDER_NONE; } // forces update of thumb's visual appearence (does nothing if m_dirty=false) void UpdateThumb(); // SetThumbPosition() helper void DoSetThumb(int thumbPos); // common part of all ctors void Init(); // is this scrollbar attached to a window or a standalone control? bool IsStandalone() const; // scrollbar geometry methods: // gets the bounding box for a scrollbar element for the given (by default // - current) thumb position wxRect GetScrollbarRect(wxScrollBar::Element elem, int thumbPos = -1) const; // returns the size of the scrollbar shaft excluding the arrows wxCoord GetScrollbarSize() const; // translate the scrollbar position (in logical units) into physical // coordinate (in pixels) and the other way round wxCoord ScrollbarToPixel(int thumbPos = -1); int PixelToScrollbar(wxCoord coord); // return the starting and ending positions, in pixels, of the thumb of a // scrollbar with the given logical position, thumb size and range and the // given physical length static void GetScrollBarThumbSize(wxCoord length, int thumbPos, int thumbSize, int range, wxCoord *thumbStart, wxCoord *thumbEnd); 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; friend WXDLLIMPEXP_CORE class wxControlRenderer; // for geometry methods friend class wxStdScrollBarInputHandler; // for geometry methods DECLARE_EVENT_TABLE() DECLARE_DYNAMIC_CLASS(wxScrollBar) }; // ---------------------------------------------------------------------------- // Standard scrollbar input handler which can be used as a base class // ---------------------------------------------------------------------------- class WXDLLIMPEXP_CORE 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(wxInputConsumer *consumer, const wxKeyEvent& event, bool pressed); virtual bool HandleMouse(wxInputConsumer *consumer, const wxMouseEvent& event); virtual bool HandleMouseMove(wxInputConsumer *consumer, 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: // return true if the mouse button can be used to activate scrollbar, false // if not (any button under GTK+ unlike left button only which is default) virtual bool IsAllowedButton(int button) const { return button == wxMOUSE_BTN_LEFT; } // 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_