X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/34138703c3997ce676a1e713d9ff9eb020640da7..b02dd12239c8a59b9a545d9fcb04974f8ad02c6b:/include/wx/scrolwin.h diff --git a/include/wx/scrolwin.h b/include/wx/scrolwin.h index 44298184bb..6360fd721b 100644 --- a/include/wx/scrolwin.h +++ b/include/wx/scrolwin.h @@ -1,7 +1,457 @@ +///////////////////////////////////////////////////////////////////////////// +// Name: wx/scrolwin.h +// Purpose: wxScrolledWindow, wxScrolledControl and wxScrollHelper +// Author: Vadim Zeitlin +// Modified by: +// Created: 30.08.00 +// RCS-ID: $Id$ +// Copyright: (c) 2000 Vadim Zeitlin +// Licence: wxWindows licence +///////////////////////////////////////////////////////////////////////////// + #ifndef _WX_SCROLWIN_H_BASE_ #define _WX_SCROLWIN_H_BASE_ -#include "wx/generic/scrolwin.h" +#include "wx/panel.h" + +class WXDLLIMPEXP_FWD_CORE wxScrollHelperEvtHandler; +class WXDLLIMPEXP_FWD_BASE wxTimer; + +// default scrolled window style: scroll in both directions +#define wxScrolledWindowStyle (wxHSCROLL | wxVSCROLL) + +// values for the second argument of wxScrollHelper::ShowScrollbars() +enum wxScrollbarVisibility +{ + wxSHOW_SB_NEVER = -1, // never show the scrollbar at all + wxSHOW_SB_DEFAULT, // show scrollbar only if it is needed + wxSHOW_SB_ALWAYS // always show scrollbar, even if not needed +}; + +// ---------------------------------------------------------------------------- +// The hierarchy of scrolling classes is a bit complicated because we want to +// put as much functionality as possible in a mix-in class not deriving from +// wxWindow so that other classes could derive from the same base class on all +// platforms irrespectively of whether they are native controls (and hence +// don't use our scrolling) or not. +// +// So we have +// +// wxScrollHelperBase +// | +// | +// \|/ +// wxWindow wxScrollHelper +// | \ / / +// | \ / / +// | _| |_ / +// | wxScrolledWindow / +// | / +// \|/ / +// wxControl / +// \ / +// \ / +// _| |_ +// wxScrolledControl +// +// ---------------------------------------------------------------------------- + +class WXDLLIMPEXP_CORE wxScrollHelperBase +{ +public: + // ctor must be given the associated window + wxScrollHelperBase(wxWindow *winToScroll); + virtual ~wxScrollHelperBase(); + + // configure the scrolling + virtual void SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY, + int noUnitsX, int noUnitsY, + int xPos = 0, int yPos = 0, + bool noRefresh = false ); + + // scroll to the given (in logical coords) position + // + // notice that for backwards compatibility reasons Scroll() is virtual as + // the existing code could override it but new code should override + // DoScroll() instead + virtual void Scroll(int x, int y) { DoScroll(x, y); } + virtual void Scroll(const wxPoint& pt) { DoScroll(pt.x, pt.y); } + + // get/set the page size for this orientation (wxVERTICAL/wxHORIZONTAL) + int GetScrollPageSize(int orient) const; + void SetScrollPageSize(int orient, int pageSize); + + // get the number of lines the window can scroll, + // returns 0 if no scrollbars are there. + int GetScrollLines( int orient ) const; + + // Set the x, y scrolling increments. + void SetScrollRate( int xstep, int ystep ); + + // get the size of one logical unit in physical ones + void GetScrollPixelsPerUnit(int *pixelsPerUnitX, int *pixelsPerUnitY) const; + + // Set scrollbar visibility: it is possible to show scrollbar only if it is + // needed (i.e. if our virtual size is greater than the current size of the + // associated window), always (as wxALWAYS_SHOW_SB style does) or never (in + // which case you should provide some other way to scroll the window as the + // user wouldn't be able to do it at all) + void ShowScrollbars(wxScrollbarVisibility horz, wxScrollbarVisibility vert) + { + DoShowScrollbars(horz, vert); + } + + // Enable/disable Windows scrolling in either direction. If true, wxWidgets + // scrolls the canvas and only a bit of the canvas is invalidated; no + // Clear() is necessary. If false, the whole canvas is invalidated and a + // Clear() is necessary. Disable for when the scroll increment is used to + // actually scroll a non-constant distance + virtual void EnableScrolling(bool x_scrolling, bool y_scrolling); + + // Disable use of keyboard keys for scrolling. By default cursor movement + // keys (including Home, End, Page Up and Down) are used to scroll the + // window appropriately. If the derived class uses these keys for something + // else, e.g. changing the currently selected item, this function can be + // used to disable this behaviour as it's not only not necessary then but + // can actually be actively harmful if another object forwards a keyboard + // event corresponding to one of the above keys to us using + // ProcessWindowEvent() because the event will always be processed which + // can be undesirable. + void DisableKeyboardScrolling() { m_kbdScrollingEnabled = false; } + + // Get the view start + void GetViewStart(int *x, int *y) const { DoGetViewStart(x, y); } + + wxPoint GetViewStart() const + { + wxPoint pt; + DoGetViewStart(&pt.x, &pt.y); + return pt; + } + + // Set the scale factor, used in PrepareDC + void SetScale(double xs, double ys) { m_scaleX = xs; m_scaleY = ys; } + double GetScaleX() const { return m_scaleX; } + double GetScaleY() const { return m_scaleY; } + + // translate between scrolled and unscrolled coordinates + void CalcScrolledPosition(int x, int y, int *xx, int *yy) const + { DoCalcScrolledPosition(x, y, xx, yy); } + wxPoint CalcScrolledPosition(const wxPoint& pt) const + { + wxPoint p2; + DoCalcScrolledPosition(pt.x, pt.y, &p2.x, &p2.y); + return p2; + } + + void CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const + { DoCalcUnscrolledPosition(x, y, xx, yy); } + wxPoint CalcUnscrolledPosition(const wxPoint& pt) const + { + wxPoint p2; + DoCalcUnscrolledPosition(pt.x, pt.y, &p2.x, &p2.y); + return p2; + } + + void DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const; + void DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const; + + // Adjust the scrollbars + virtual void AdjustScrollbars() = 0; + + // Calculate scroll increment + int CalcScrollInc(wxScrollWinEvent& event); + + // 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). + void SetTargetWindow(wxWindow *target); + wxWindow *GetTargetWindow() const; + + void SetTargetRect(const wxRect& rect) { m_rectToScroll = rect; } + wxRect GetTargetRect() const { return m_rectToScroll; } + + // 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. + virtual void DoPrepareDC(wxDC& dc); + + // are we generating the autoscroll events? + bool IsAutoScrolling() const { return m_timerAutoScroll != NULL; } + + // stop generating the scroll events when mouse is held outside the window + void StopAutoScrolling(); + + // this method can be overridden in a derived class to forbid sending the + // auto scroll events - note that unlike StopAutoScrolling() it doesn't + // stop the timer, so it will be called repeatedly and will typically + // return different values depending on the current mouse position + // + // the base class version just returns true + virtual bool SendAutoScrollEvents(wxScrollWinEvent& event) const; + + // the methods to be called from the window event handlers + void HandleOnScroll(wxScrollWinEvent& event); + void HandleOnSize(wxSizeEvent& event); + void HandleOnPaint(wxPaintEvent& event); + void HandleOnChar(wxKeyEvent& event); + void HandleOnMouseEnter(wxMouseEvent& event); + void HandleOnMouseLeave(wxMouseEvent& event); +#if wxUSE_MOUSEWHEEL + void HandleOnMouseWheel(wxMouseEvent& event); +#endif // wxUSE_MOUSEWHEEL + void HandleOnChildFocus(wxChildFocusEvent& event); + +#if WXWIN_COMPATIBILITY_2_8 + wxDEPRECATED( + void OnScroll(wxScrollWinEvent& event) { HandleOnScroll(event); } + ) +#endif // WXWIN_COMPATIBILITY_2_8 + +protected: + // get pointer to our scroll rect if we use it or NULL + const wxRect *GetScrollRect() const + { + return m_rectToScroll.width != 0 ? &m_rectToScroll : NULL; + } + + // get the size of the target window + wxSize GetTargetSize() const + { + return m_rectToScroll.width != 0 ? m_rectToScroll.GetSize() + : m_targetWindow->GetClientSize(); + } + + void GetTargetSize(int *w, int *h) const + { + wxSize size = GetTargetSize(); + if ( w ) + *w = size.x; + if ( h ) + *h = size.y; + } + + // implementation of public methods with the same name + virtual void DoGetViewStart(int *x, int *y) const; + virtual void DoScroll(int x, int y) = 0; + virtual void DoShowScrollbars(wxScrollbarVisibility horz, + wxScrollbarVisibility vert) = 0; + + // implementations of various wxWindow virtual methods which should be + // forwarded to us (this can be done by WX_FORWARD_TO_SCROLL_HELPER()) + bool ScrollLayout(); + void ScrollDoSetVirtualSize(int x, int y); + wxSize ScrollGetBestVirtualSize() const; + + // change just the target window (unlike SetWindow which changes m_win as + // well) + void DoSetTargetWindow(wxWindow *target); + + // delete the event handler we installed + void DeleteEvtHandler(); + // calls wxScrollHelperEvtHandler::ResetDrawnFlag(), see explanation + // in wxScrollHelperEvtHandler::ProcessEvent() + void ResetDrawnFlag(); + + // this function should be overridden to return the size available for + // m_targetWindow inside m_win of the given size + // + // the default implementation is only good for m_targetWindow == m_win + // case, if we're scrolling a subwindow you must override this method + virtual wxSize GetSizeAvailableForScrollTarget(const wxSize& size) + { + // returning just size from here is wrong but it was decided that it is + // not wrong enough to break the existing code (which doesn't override + // this recently added function at all) by adding this assert + // + // wxASSERT_MSG( m_targetWindow == m_win, "must be overridden" ); + + return size; + } + + + double m_scaleX; + double m_scaleY; + + wxWindow *m_win, + *m_targetWindow; + + wxRect m_rectToScroll; + + wxTimer *m_timerAutoScroll; + + int m_xScrollPixelsPerLine; + int m_yScrollPixelsPerLine; + int m_xScrollPosition; + int m_yScrollPosition; + int m_xScrollLines; + int m_yScrollLines; + int m_xScrollLinesPerPage; + int m_yScrollLinesPerPage; + + bool m_xScrollingEnabled; + bool m_yScrollingEnabled; + + bool m_kbdScrollingEnabled; + +#if wxUSE_MOUSEWHEEL + int m_wheelRotation; +#endif // wxUSE_MOUSEWHEEL + + wxScrollHelperEvtHandler *m_handler; + + wxDECLARE_NO_COPY_CLASS(wxScrollHelperBase); +}; + +// this macro can be used in a wxScrollHelper-derived class to forward wxWindow +// methods to corresponding wxScrollHelper methods +#define WX_FORWARD_TO_SCROLL_HELPER() \ +public: \ + virtual void PrepareDC(wxDC& dc) { DoPrepareDC(dc); } \ + virtual bool Layout() { return ScrollLayout(); } \ + virtual void DoSetVirtualSize(int x, int y) \ + { ScrollDoSetVirtualSize(x, y); } \ + virtual wxSize GetBestVirtualSize() const \ + { return ScrollGetBestVirtualSize(); } + +// include the declaration of the real wxScrollHelper +#if defined(__WXGTK20__) && !defined(__WXUNIVERSAL__) + #include "wx/gtk/scrolwin.h" +#elif defined(__WXGTK__) && !defined(__WXUNIVERSAL__) + #include "wx/gtk1/scrolwin.h" +#else + #define wxHAS_GENERIC_SCROLLWIN + #include "wx/generic/scrolwin.h" #endif - // _WX_SCROLWIN_H_BASE_ + +// ---------------------------------------------------------------------------- +// wxScrolled: a wxWindow which knows how to scroll +// ---------------------------------------------------------------------------- + +// helper class for wxScrolled below +struct WXDLLIMPEXP_CORE wxScrolledT_Helper +{ + static wxSize FilterBestSize(const wxWindow *win, + const wxScrollHelper *helper, + const wxSize& origBest); +#ifdef __WXMSW__ + static WXLRESULT FilterMSWWindowProc(WXUINT nMsg, WXLRESULT origResult); +#endif +}; + +// Scrollable window base on window type T. This used to be wxScrolledWindow, +// but wxScrolledWindow includes wxControlContainer functionality and that's +// not always desirable. +template +class wxScrolled : public T, + public wxScrollHelper, + private wxScrolledT_Helper +{ +public: + wxScrolled() : wxScrollHelper(this) { } + wxScrolled(wxWindow *parent, + wxWindowID winid = wxID_ANY, + const wxPoint& pos = wxDefaultPosition, + const wxSize& size = wxDefaultSize, + long style = wxScrolledWindowStyle, + const wxString& name = wxPanelNameStr) + : wxScrollHelper(this) + { + Create(parent, winid, pos, size, style, name); + } + + bool Create(wxWindow *parent, + wxWindowID winid, + const wxPoint& pos = wxDefaultPosition, + const wxSize& size = wxDefaultSize, + long style = wxScrolledWindowStyle, + const wxString& name = wxPanelNameStr) + { + m_targetWindow = this; + +#ifdef __WXMAC__ + this->MacSetClipChildren(true); +#endif + + this->Connect(wxEVT_PAINT, wxPaintEventHandler(wxScrolled::OnPaint)); + + // by default, we're scrollable in both directions (but if one of the + // styles is specified explicitly, we shouldn't add the other one + // automatically) + if ( !(style & (wxHSCROLL | wxVSCROLL)) ) + style |= wxHSCROLL | wxVSCROLL; + + return T::Create(parent, winid, pos, size, style, name); + } + + // we need to return a special WM_GETDLGCODE value to process just the + // arrows but let the other navigation characters through +#ifdef __WXMSW__ + virtual WXLRESULT MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) + { + return FilterMSWWindowProc(nMsg, T::MSWWindowProc(nMsg, wParam, lParam)); + } +#endif // __WXMSW__ + + WX_FORWARD_TO_SCROLL_HELPER() + +protected: + virtual wxSize DoGetBestSize() const + { + return FilterBestSize(this, this, T::DoGetBestSize()); + } + +private: + // this is needed for wxEVT_PAINT processing hack described in + // wxScrollHelperEvtHandler::ProcessEvent() + void OnPaint(wxPaintEvent& event) + { + // the user code didn't really draw the window if we got here, so set + // this flag to try to call OnDraw() later + ResetDrawnFlag(); + event.Skip(); + } + + // VC++ 6 gives warning for the declaration of template member function + // without definition +#ifndef __VISUALC6__ + wxDECLARE_NO_COPY_CLASS(wxScrolled); +#endif +}; + +#ifdef __VISUALC6__ + // disable the warning about non dll-interface class used as base for + // dll-interface class: it's harmless in this case + #pragma warning(push) + #pragma warning(disable:4275) +#endif + +// for compatibility with existing code, we provide wxScrolledWindow +// "typedef" for wxScrolled. It's not a real typedef because we +// want wxScrolledWindow to show in wxRTTI information (the class is widely +// used and likelihood of its wxRTTI information being used too is high): +class WXDLLIMPEXP_CORE wxScrolledWindow : public wxScrolled +{ +public: + wxScrolledWindow() : wxScrolled() {} + wxScrolledWindow(wxWindow *parent, + wxWindowID winid = wxID_ANY, + const wxPoint& pos = wxDefaultPosition, + const wxSize& size = wxDefaultSize, + long style = wxScrolledWindowStyle, + const wxString& name = wxPanelNameStr) + : wxScrolled(parent, winid, pos, size, style, name) {} + + DECLARE_DYNAMIC_CLASS_NO_COPY(wxScrolledWindow) +}; + +typedef wxScrolled wxScrolledCanvas; + +#ifdef __VISUALC6__ + #pragma warning(pop) +#endif + +#endif // _WX_SCROLWIN_H_BASE_