480 lines
18 KiB
C++
480 lines
18 KiB
C++
/////////////////////////////////////////////////////////////////////////////
|
|
// Name: wx/scrolwin.h
|
|
// Purpose: wxScrolledWindow, wxScrolledControl and wxScrollHelper
|
|
// Author: Vadim Zeitlin
|
|
// Modified by:
|
|
// Created: 30.08.00
|
|
// Copyright: (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
|
|
// Licence: wxWindows licence
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef _WX_SCROLWIN_H_BASE_
|
|
#define _WX_SCROLWIN_H_BASE_
|
|
|
|
#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)
|
|
|
|
// 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
|
|
};
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// 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
|
|
//
|
|
// wxAnyScrollHelperBase
|
|
// |
|
|
// |
|
|
// \|/
|
|
// wxScrollHelperBase
|
|
// |
|
|
// |
|
|
// \|/
|
|
// wxWindow wxScrollHelper
|
|
// | \ / /
|
|
// | \ / /
|
|
// | _| |_ /
|
|
// | wxScrolledWindow /
|
|
// | /
|
|
// \|/ /
|
|
// wxControl /
|
|
// \ /
|
|
// \ /
|
|
// _| |_
|
|
// wxScrolledControl
|
|
//
|
|
// ----------------------------------------------------------------------------
|
|
|
|
// This class allows reusing some of wxScrollHelperBase functionality in
|
|
// wxVarScrollHelperBase in wx/vscroll.h without duplicating its code.
|
|
class WXDLLIMPEXP_CORE wxAnyScrollHelperBase
|
|
{
|
|
public:
|
|
explicit wxAnyScrollHelperBase(wxWindow* win);
|
|
virtual ~wxAnyScrollHelperBase() {}
|
|
|
|
// 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; }
|
|
|
|
// 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) = 0;
|
|
|
|
// Simple accessor for the window that is really being scrolled.
|
|
wxWindow *GetTargetWindow() const { return m_targetWindow; }
|
|
|
|
|
|
// The methods called from the window event handlers.
|
|
void HandleOnChar(wxKeyEvent& event);
|
|
void HandleOnPaint(wxPaintEvent& event);
|
|
|
|
protected:
|
|
// the window that receives the scroll events and the window to actually
|
|
// scroll, respectively
|
|
wxWindow *m_win,
|
|
*m_targetWindow;
|
|
|
|
// whether cursor keys should scroll the window
|
|
bool m_kbdScrollingEnabled;
|
|
};
|
|
|
|
// This is the class containing the guts of (uniform) scrolling logic.
|
|
class WXDLLIMPEXP_CORE wxScrollHelperBase : public wxAnyScrollHelperBase
|
|
{
|
|
public:
|
|
// 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 );
|
|
|
|
// scroll to the given (in logical coords) position
|
|
//
|
|
// 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
|
|
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);
|
|
}
|
|
|
|
// Test whether the specified scrollbar is shown.
|
|
virtual bool IsScrollbarShown(int orient) const = 0;
|
|
|
|
// 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
|
|
//
|
|
// Notice that calling this method with a false argument doesn't disable
|
|
// scrolling the window in this direction, it just changes the mechanism by
|
|
// which it is implemented to not use wxWindow::ScrollWindow().
|
|
virtual void EnableScrolling(bool x_scrolling, bool y_scrolling);
|
|
|
|
// Get the view start
|
|
void GetViewStart(int *x, int *y) const { DoGetViewStart(x, y); }
|
|
|
|
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 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;
|
|
}
|
|
|
|
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() = 0;
|
|
|
|
// Calculate scroll increment
|
|
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).
|
|
void SetTargetWindow(wxWindow *target);
|
|
|
|
void SetTargetRect(const wxRect& rect) { m_rectToScroll = rect; }
|
|
wxRect GetTargetRect() const { return m_rectToScroll; }
|
|
|
|
virtual void DoPrepareDC(wxDC& dc) wxOVERRIDE;
|
|
|
|
// 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 HandleOnMouseEnter(wxMouseEvent& event);
|
|
void HandleOnMouseLeave(wxMouseEvent& event);
|
|
#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 *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;
|
|
}
|
|
|
|
// 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();
|
|
|
|
// 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;
|
|
|
|
wxRect m_rectToScroll;
|
|
|
|
wxTimer *m_timerAutoScroll;
|
|
|
|
// The number of pixels to scroll in horizontal and vertical directions
|
|
// respectively.
|
|
//
|
|
// If 0, means that the scrolling in the given direction is disabled.
|
|
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;
|
|
|
|
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) wxOVERRIDE { DoPrepareDC(dc); } \
|
|
virtual bool Layout() wxOVERRIDE { return ScrollLayout(); } \
|
|
virtual bool CanScroll(int orient) const wxOVERRIDE \
|
|
{ return IsScrollbarShown(orient); } \
|
|
virtual void DoSetVirtualSize(int x, int y) wxOVERRIDE \
|
|
{ ScrollDoSetVirtualSize(x, y); } \
|
|
virtual wxSize GetBestVirtualSize() const wxOVERRIDE \
|
|
{ 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
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// 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 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);
|
|
}
|
|
|
|
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
|
|
|
|
// 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;
|
|
|
|
#ifdef __WXOSX__
|
|
bool retval = T::Create(parent, winid, pos, size, style, name);
|
|
if ( retval && (style & wxALWAYS_SHOW_SB) )
|
|
ShowScrollbars(wxSHOW_SB_ALWAYS, wxSHOW_SB_ALWAYS);
|
|
return retval;
|
|
#else
|
|
if ( style & wxALWAYS_SHOW_SB )
|
|
ShowScrollbars(wxSHOW_SB_ALWAYS, wxSHOW_SB_ALWAYS);
|
|
|
|
return T::Create(parent, winid, pos, size, style, name);
|
|
#endif
|
|
}
|
|
|
|
#ifdef __WXMSW__
|
|
// we need to return a special WM_GETDLGCODE value to process just the
|
|
// arrows but let the other navigation characters through
|
|
virtual WXLRESULT MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) wxOVERRIDE
|
|
{
|
|
return FilterMSWWindowProc(nMsg, T::MSWWindowProc(nMsg, wParam, lParam));
|
|
}
|
|
|
|
// Take into account the scroll origin.
|
|
virtual void MSWAdjustBrushOrg(int* xOrg, int* yOrg) const wxOVERRIDE
|
|
{
|
|
CalcUnscrolledPosition(*xOrg, *yOrg, xOrg, yOrg);
|
|
}
|
|
#endif // __WXMSW__
|
|
|
|
WX_FORWARD_TO_SCROLL_HELPER()
|
|
|
|
protected:
|
|
virtual wxSize DoGetBestSize() const wxOVERRIDE
|
|
{
|
|
return FilterBestSize(this, this, T::DoGetBestSize());
|
|
}
|
|
|
|
private:
|
|
wxDECLARE_NO_COPY_CLASS(wxScrolled);
|
|
};
|
|
|
|
// 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) {}
|
|
|
|
wxDECLARE_DYNAMIC_CLASS_NO_COPY(wxScrolledWindow);
|
|
};
|
|
|
|
typedef wxScrolled<wxWindow> wxScrolledCanvas;
|
|
|
|
#endif // _WX_SCROLWIN_H_BASE_
|