#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
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 );
#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
: m_targetWindow->GetClientSize();
}
- void GetTargetSize(int *w, int *h)
+ void GetTargetSize(int *w, int *h) const
{
wxSize size = GetTargetSize();
if ( w )
*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);
// 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;
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<T>: 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<T> 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 T>
+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<wxPanel> )
+WXDLLIMPEXP_TEMPLATE_INSTANCE_CORE( wxScrolled<wxWindow> )
+
+// for compatibility with existing code, we provide wxScrolledWindow
+// "typedef" for wxScrolled<wxPanel>. 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<wxPanel>
+{
+public:
+ wxScrolledWindow() : wxScrolled<wxPanel>() {}
+ wxScrolledWindow(wxWindow *parent,
+ wxWindowID winid = wxID_ANY,
+ const wxPoint& pos = wxDefaultPosition,
+ const wxSize& size = wxDefaultSize,
+ long style = wxScrolledWindowStyle,
+ const wxString& name = wxPanelNameStr)
+ : wxScrolled<wxPanel>(parent, winid, pos, size, style, name) {}
+
+ DECLARE_DYNAMIC_CLASS_NO_COPY(wxScrolledWindow)
+};
+
+typedef wxScrolled<wxWindow> wxScrolledCanvas;
+#endif // _WX_SCROLWIN_H_BASE_
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