//
// ----------------------------------------------------------------------------
-class WXDLLEXPORT wxScrollHelper
+class WXDLLIMPEXP_CORE wxScrollHelper
{
public:
// ctor must be given the associated window
// 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);
+
double m_scaleX;
double m_scaleY;
wxScrollHelperEvtHandler *m_handler;
+private:
+ // 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;
+ }
+
DECLARE_NO_COPY_CLASS(wxScrollHelper)
};
#endif
// ----------------------------------------------------------------------------
-// wxScrolledWindow: a wxWindow which knows how to scroll
+// wxScrolled<T>: a wxWindow which knows how to scroll
// ----------------------------------------------------------------------------
-class WXDLLEXPORT wxScrolledWindow : public wxPanel,
- public wxScrollHelperNative
+// 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
+};
+
+// 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:
- wxScrolledWindow() : wxScrollHelperNative(this) { }
- wxScrolledWindow(wxWindow *parent,
- wxWindowID winid = wxID_ANY,
- const wxPoint& pos = wxDefaultPosition,
- const wxSize& size = wxDefaultSize,
- long style = wxScrolledWindowStyle,
- const wxString& name = wxPanelNameStr)
+ 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)
{
Create(parent, winid, pos, size, style, name);
}
- virtual ~wxScrolledWindow();
-
bool Create(wxWindow *parent,
wxWindowID winid,
const wxPoint& pos = wxDefaultPosition,
const wxSize& size = wxDefaultSize,
long style = wxScrolledWindowStyle,
- const wxString& name = wxPanelNameStr);
+ 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);
+ 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;
+ 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);
+ 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
+};
+
+// 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) {}
-private:
DECLARE_DYNAMIC_CLASS_NO_COPY(wxScrolledWindow)
- DECLARE_EVENT_TABLE()
};
-#endif // _WX_SCROLWIN_H_BASE_
+typedef wxScrolled<wxWindow> wxScrolledCanvas;
+#endif // _WX_SCROLWIN_H_BASE_
projects / wxWidgets.git / blobdiff