X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/adfea104dc4cdf8378cb7553ad755a1a9815470e..ea5af9c5356676a5c4d81b4d4915ad32ca3c9c6e:/include/wx/scrolwin.h diff --git a/include/wx/scrolwin.h b/include/wx/scrolwin.h index aae769bea4..006a4d6ca3 100644 --- a/include/wx/scrolwin.h +++ b/include/wx/scrolwin.h @@ -12,24 +12,47 @@ #ifndef _WX_SCROLWIN_H_BASE_ #define _WX_SCROLWIN_H_BASE_ -#include "wx/window.h" +#include "wx/panel.h" -class WXDLLEXPORT wxScrollHelperEvtHandler; -class WXDLLEXPORT wxTimer; +class WXDLLIMPEXP_FWD_CORE wxScrollHelperEvtHandler; +class WXDLLIMPEXP_FWD_BASE wxTimer; + +// default scrolled window style: scroll in both directions +#define wxScrolledWindowStyle (wxHSCROLL | wxVSCROLL) // ---------------------------------------------------------------------------- -// wxScrollHelper: this class implements the scrolling logic which is used by -// wxScrolledWindow and wxScrolledControl. It is a mix-in: just derive from it -// to implement scrolling in your class. +// 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 +// +// wxScrollHelper +// | +// | +// \|/ +// wxWindow wxScrollHelperNative +// | \ / / +// | \ / / +// | _| |_ / +// | wxScrolledWindow / +// | / +// \|/ / +// wxControl / +// \ / +// \ / +// _| |_ +// wxScrolledControl +// // ---------------------------------------------------------------------------- -#if !defined(__WXGTK__) || defined(__WXUNIVERSAL__) -class WXDLLEXPORT wxScrollHelper +class WXDLLIMPEXP_CORE wxScrollHelper { public: - // ctor and dtor - wxScrollHelper(wxWindow *winToScroll = (wxWindow *)NULL); - void SetWindow(wxWindow *winToScroll); + // ctor must be given the associated window + wxScrollHelper(wxWindow *winToScroll); virtual ~wxScrollHelper(); // configure the scrolling @@ -45,6 +68,10 @@ public: 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 ); @@ -135,16 +162,12 @@ public: #if wxUSE_MOUSEWHEEL void HandleOnMouseWheel(wxMouseEvent& event); #endif // wxUSE_MOUSEWHEEL + void HandleOnChildFocus(wxChildFocusEvent& event); // FIXME: this is needed for now for wxPlot compilation, should be removed // once it is fixed! void OnScroll(wxScrollWinEvent& event) { HandleOnScroll(event); } -#if WXWIN_COMPATIBILITY_2_2 - // Compatibility only, don't use - void ViewStart(int *x, int *y) const { GetViewStart( x, y ); } -#endif // WXWIN_COMPATIBILITY_2_2 - protected: // get pointer to our scroll rect if we use it or NULL const wxRect *GetScrollRect() const @@ -159,7 +182,7 @@ protected: : m_targetWindow->GetClientSize(); } - void GetTargetSize(int *w, int *h) + void GetTargetSize(int *w, int *h) const { wxSize size = GetTargetSize(); if ( w ) @@ -168,6 +191,12 @@ protected: *h = size.y; } + // 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); @@ -175,6 +204,37 @@ protected: // delete the event handler we installed void DeleteEvtHandler(); + // calls wxScrollHelperEvtHandler::ResetDrawnFlag(), see explanation + // in wxScrollHelperEvtHandler::ProcessEvent() + void ResetDrawnFlag(); + + // helper of AdjustScrollbars(): does the work for the single scrollbar + // + // notice that the parameters passed by non-const references are modified + // by this function + void AdjustScrollbar(int orient, + int clientSize, + int virtSize, + int& pixelsPerUnit, + int& scrollUnits, + int& scrollPosition); + + // 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) + { + wxASSERT_MSG( m_targetWindow == m_win, "must be overridden" ); + + return size; + } + + + double m_scaleX; + double m_scaleY; + wxWindow *m_win, *m_targetWindow; @@ -194,50 +254,156 @@ protected: bool m_xScrollingEnabled; bool m_yScrollingEnabled; - double m_scaleX; - double m_scaleY; - #if wxUSE_MOUSEWHEEL int m_wheelRotation; #endif // wxUSE_MOUSEWHEEL wxScrollHelperEvtHandler *m_handler; + DECLARE_NO_COPY_CLASS(wxScrollHelper) }; +// 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 wxScrollHelperNative if needed +#if defined(__WXGTK20__) && !defined(__WXUNIVERSAL__) + #include "wx/gtk/scrolwin.h" +#elif defined(__WXGTK__) && !defined(__WXUNIVERSAL__) + #include "wx/gtk1/scrolwin.h" +#else + typedef wxScrollHelper wxScrollHelperNative; #endif // ---------------------------------------------------------------------------- -// wxScrolledWindow: a wxWindow which knows how to scroll +// wxScrolled: a wxWindow which knows how to scroll // ---------------------------------------------------------------------------- -#if defined(__WXGTK__) && !defined(__WXUNIVERSAL__) - #include "wx/gtk/scrolwin.h" -#else // !wxGTK - #include "wx/generic/scrolwin.h" +// helper class for wxScrolled below +struct WXDLLIMPEXP_CORE wxScrolledT_Helper +{ + static wxSize FilterBestSize(const wxWindow *win, + const wxScrollHelperNative *helper, + const wxSize& origBest); +#ifdef __WXMSW__ + static WXLRESULT FilterMSWWindowProc(WXUINT nMsg, WXLRESULT origResult); +#endif +}; - class WXDLLEXPORT wxScrolledWindow : public wxGenericScrolledWindow +// 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 WXDLLIMPEXP_CORE wxScrolled : public T, + public wxScrollHelperNative, + private wxScrolledT_Helper +{ +public: + wxScrolled() : wxScrollHelperNative(this) { } + wxScrolled(wxWindow *parent, + wxWindowID winid = wxID_ANY, + const wxPoint& pos = wxDefaultPosition, + const wxSize& size = wxDefaultSize, + long style = wxScrolledWindowStyle, + const wxString& name = wxPanelNameStr) + : wxScrollHelperNative(this) { - public: - wxScrolledWindow() { } - wxScrolledWindow(wxWindow *parent, - wxWindowID winid = wxID_ANY, - const wxPoint& pos = wxDefaultPosition, - const wxSize& size = wxDefaultSize, - long style = wxScrolledWindowStyle, - const wxString& name = wxPanelNameStr) - : wxGenericScrolledWindow(parent, winid, pos, size, style, name) - { - } - - private: - DECLARE_DYNAMIC_CLASS_NO_COPY(wxScrolledWindow) - }; - - #define wxSCROLLED_WINDOW_IS_GENERIC 1 + 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 +#if !defined(__VISUALC__) || wxCHECK_VISUALC_VERSION(7) + DECLARE_NO_COPY_CLASS(wxScrolled) #endif - // _WX_SCROLWIN_H_BASE_ +}; + +// VC++ <= 6 requires this; it's unlikely any other specializations would +// be needed by user code _and_ they were using VC6, so we list only wxWindow +// (typical use) and wxPanel (wxScrolledWindow use) specializations here +WXDLLIMPEXP_TEMPLATE_INSTANCE_CORE( wxScrolled ) +WXDLLIMPEXP_TEMPLATE_INSTANCE_CORE( wxScrolled ) + +// 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; +#endif // _WX_SCROLWIN_H_BASE_