+/////////////////////////////////////////////////////////////////////////////
+// Name: include/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 <zeitlin@dptmaths.ens-cachan.fr>
+// Licence: wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
#ifndef _WX_SCROLWIN_H_BASE_
#define _WX_SCROLWIN_H_BASE_
-#ifdef __WXGTK__
-#include "wx/gtk/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)
+
+// ----------------------------------------------------------------------------
+// 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
+//
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_CORE wxScrollHelper
+{
+public:
+ // ctor must be given the associated window
+ wxScrollHelper(wxWindow *winToScroll);
+ virtual ~wxScrollHelper();
+
+ // 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
+ virtual void Scroll(int x, int 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;
+
+ // 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);
+
+ // Get the view start
+ virtual void GetViewStart(int *x, int *y) const;
+
+ // 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;
+ }
+
+ virtual void DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const;
+ virtual void DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const;
+
+ // Adjust the scrollbars
+ virtual void AdjustScrollbars(void);
+
+ // Calculate scroll increment
+ virtual 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 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);
+
+ // FIXME: this is needed for now for wxPlot compilation, should be removed
+ // once it is fixed!
+ void OnScroll(wxScrollWinEvent& event) { HandleOnScroll(event); }
+
+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;
+ }
+
+ // 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)
+ {
+ // 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;
+
+#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
-#include "wx/generic/scrolwin.h"
-// For non-GTK+ platforms, always use wxGenericScrolledWindow
-class WXDLLEXPORT wxScrolledWindow: public wxGenericScrolledWindow
+ typedef wxScrollHelper wxScrollHelperNative;
+#endif
+
+// ----------------------------------------------------------------------------
+// wxScrolled<T>: a wxWindow which knows how to scroll
+// ----------------------------------------------------------------------------
+
+// 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:
- DECLARE_CLASS(wxScrolledWindow)
- wxScrolledWindow() {};
+ 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);
+ }
+
+ 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
+};
+
+// 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 id = -1,
+ wxWindowID winid = wxID_ANY,
const wxPoint& pos = wxDefaultPosition,
const wxSize& size = wxDefaultSize,
long style = wxScrolledWindowStyle,
const wxString& name = wxPanelNameStr)
- {
- wxGenericScrolledWindow::Create(parent, id, pos, size, style, name);
- }
+ : wxScrolled<wxPanel>(parent, winid, pos, size, style, name) {}
+
+ DECLARE_DYNAMIC_CLASS_NO_COPY(wxScrolledWindow)
};
-#define wxSCROLLED_WINDOW_IS_GENERIC 1
-#endif
-#endif
- // _WX_SCROLWIN_H_BASE_
+typedef wxScrolled<wxWindow> wxScrolledCanvas;
+
+#endif // _WX_SCROLWIN_H_BASE_
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