/////////////////////////////////////////////////////////////////////////////
-// Name: include/wx/scrolwin.h
+// Name: wx/scrolwin.h
// Purpose: wxScrolledWindow, wxScrolledControl and wxScrollHelper
// Author: Vadim Zeitlin
// Modified by:
#ifndef _WX_SCROLWIN_H_BASE_
#define _WX_SCROLWIN_H_BASE_
-#include "wx/window.h"
+#include "wx/panel.h"
-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)
+
+// 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
+};
// ----------------------------------------------------------------------------
-// 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
+//
+// wxScrollHelperBase
+// |
+// |
+// \|/
+// wxWindow wxScrollHelper
+// | \ / /
+// | \ / /
+// | _| |_ /
+// | wxScrolledWindow /
+// | /
+// \|/ /
+// wxControl /
+// \ /
+// \ /
+// _| |_
+// wxScrolledControl
+//
// ----------------------------------------------------------------------------
-class WXDLLEXPORT wxScrollHelper
+class WXDLLIMPEXP_CORE wxScrollHelperBase
{
public:
- // ctor and dtor
- wxScrollHelper(wxWindow *winToScroll = (wxWindow *)NULL);
- void SetWindow(wxWindow *winToScroll);
- virtual ~wxScrollHelper();
+ // 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 );
+ bool noRefresh = false );
// scroll to the given (in logical coords) position
- virtual void Scroll(int x, int y);
+ //
+ // 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
- virtual void GetScrollPixelsPerUnit(int *pixelsPerUnitX,
- int *pixelsPerUnitY) const;
+ 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, wxWindows
+ // 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. 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
- virtual void GetViewStart(int *x, int *y) const;
+ void GetViewStart(int *x, int *y) const { DoGetViewStart(x, y); }
- // Actual size in pixels when scrolling is taken into account
- virtual void GetVirtualSize(int *x, int *y) const;
+ 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 GetScaleY() const { return m_scaleY; }
// translate between scrolled and unscrolled coordinates
- virtual void CalcScrolledPosition(int x, int y, int *xx, int *yy) const;
- virtual void CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const;
+ 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(void);
+ virtual void AdjustScrollbars() = 0;
// Calculate scroll increment
- virtual int CalcScrollInc(wxScrollWinEvent& event);
+ 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).
- virtual void SetTargetWindow(wxWindow *target);
- virtual wxWindow *GetTargetWindow() const;
+ void SetTargetWindow(wxWindow *target);
+ wxWindow *GetTargetWindow() const;
void SetTargetRect(const wxRect& rect) { m_rectToScroll = rect; }
wxRect GetTargetRect() const { return m_rectToScroll; }
// 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
+ // the base class version just returns true
virtual bool SendAutoScrollEvents(wxScrollWinEvent& event) const;
// the methods to be called from the window event handlers
#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 *GetRect() const
+ const wxRect *GetScrollRect() const
{
return m_rectToScroll.width != 0 ? &m_rectToScroll : NULL;
}
: m_targetWindow->GetClientSize();
}
- void GetTargetSize(int *w, int *h)
+ void GetTargetSize(int *w, int *h) const
{
wxSize size = GetTargetSize();
if ( w )
*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;
bool m_xScrollingEnabled;
bool m_yScrollingEnabled;
- double m_scaleX;
- double m_scaleY;
+ 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
+
// ----------------------------------------------------------------------------
-// wxScrolledWindow: a wxWindow which knows how to scroll
+// wxScrolled<T>: a wxWindow which knows how to scroll
// ----------------------------------------------------------------------------
-#ifdef __WXGTK__
- #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 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 T>
+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);
+ }
- class WXDLLEXPORT wxScrolledWindow : public wxGenericScrolledWindow
+ bool Create(wxWindow *parent,
+ wxWindowID winid,
+ const wxPoint& pos = wxDefaultPosition,
+ const wxSize& size = wxDefaultSize,
+ long style = wxScrolledWindowStyle,
+ const wxString& name = wxPanelNameStr)
{
- public:
- wxScrolledWindow() { }
- wxScrolledWindow(wxWindow *parent,
- wxWindowID id = -1,
- const wxPoint& pos = wxDefaultPosition,
- const wxSize& size = wxDefaultSize,
- long style = wxScrolledWindowStyle,
- const wxString& name = wxPanelNameStr)
- : wxGenericScrolledWindow(parent, id, pos, size, style, name)
- {
- }
-
- private:
- DECLARE_CLASS(wxScrolledWindow)
- };
-
- #define wxSCROLLED_WINDOW_IS_GENERIC 1
+ 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
- // _WX_SCROLWIN_H_BASE_
+};
+
+#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<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;
+
+#ifdef __VISUALC6__
+ #pragma warning(pop)
+#endif
+
+#endif // _WX_SCROLWIN_H_BASE_
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