// user code defined OnPaint() in the derived class)
m_hasDrawnWindow = true;
- // pass it on to the real handler
- bool processed = wxEvtHandler::ProcessEvent(event);
+ // Pass it on to the real handler: notice that we must not call
+ // ProcessEvent() on this object itself as it wouldn't pass it to the next
+ // handler (i.e. the real window) if we're called from a previous handler
+ // (as indicated by "process here only" flag being set) and we do want to
+ // execute the handler defined in the window we're associated with right
+ // now, without waiting until TryAfter() is called from wxEvtHandler.
+ bool processed = m_nextHandler->ProcessEvent(event);
// always process the size events ourselves, even if the user code handles
// them as well, as we need to AdjustScrollbars()
}
}
- if ( processed )
- event.Skip(wasSkipped);
+ event.Skip(wasSkipped);
+
+ // We called ProcessEvent() on the next handler, meaning that we explicitly
+ // worked around the request to process the event in this handler only. As
+ // explained above, this is unfortunately really necessary but the trouble
+ // is that the event will continue to be post-processed by the previous
+ // handler resulting in duplicate calls to event handlers. Call the special
+ // function below to prevent this from happening, base class DoTryChain()
+ // will check for it and behave accordingly.
+ //
+ // And if we're not called from DoTryChain(), this won't do anything anyhow.
+ event.DidntHonourProcessOnlyIn();
return processed;
}
wxScrollHelperBase::wxScrollHelperBase(wxWindow *win)
{
- wxASSERT_MSG( win, _T("associated window can't be NULL in wxScrollHelper") );
+ wxASSERT_MSG( win, wxT("associated window can't be NULL in wxScrollHelper") );
m_xScrollPixelsPerLine =
m_yScrollPixelsPerLine =
m_xScrollingEnabled =
m_yScrollingEnabled = true;
+ m_kbdScrollingEnabled = true;
+
m_scaleX =
m_scaleY = 1.0;
#if wxUSE_MOUSEWHEEL
// this they always have the priority
void wxScrollHelperBase::HandleOnChar(wxKeyEvent& event)
{
- int stx = 0, sty = 0, // view origin
- szx = 0, szy = 0, // view size (total)
- clix = 0, cliy = 0; // view size (on screen)
-
- GetViewStart(&stx, &sty);
- GetTargetSize(&clix, &cliy);
- m_targetWindow->GetVirtualSize(&szx, &szy);
-
- if( m_xScrollPixelsPerLine )
+ if ( !m_kbdScrollingEnabled )
{
- clix /= m_xScrollPixelsPerLine;
- szx /= m_xScrollPixelsPerLine;
- }
- else
- {
- clix = 0;
- szx = -1;
- }
- if( m_yScrollPixelsPerLine )
- {
- cliy /= m_yScrollPixelsPerLine;
- szy /= m_yScrollPixelsPerLine;
- }
- else
- {
- cliy = 0;
- szy = -1;
+ event.Skip();
+ return;
}
- int xScrollOld = m_xScrollPosition,
- yScrollOld = m_yScrollPosition;
+ // prepare the event this key press maps to
+ wxScrollWinEvent newEvent;
+
+ newEvent.SetPosition(0);
+ newEvent.SetEventObject(m_win);
+
+ // this is the default, it's changed to wxHORIZONTAL below if needed
+ newEvent.SetOrientation(wxVERTICAL);
+
+ // some key events result in scrolling in both horizontal and vertical
+ // direction, e.g. Ctrl-{Home,End}, if this flag is true we should generate
+ // a second event in horizontal direction in addition to the primary one
+ bool sendHorizontalToo = false;
- int dsty;
switch ( event.GetKeyCode() )
{
case WXK_PAGEUP:
- dsty = sty - (5 * cliy / 6);
- Scroll(-1, (dsty == -1) ? 0 : dsty);
+ newEvent.SetEventType(wxEVT_SCROLLWIN_PAGEUP);
break;
case WXK_PAGEDOWN:
- Scroll(-1, sty + (5 * cliy / 6));
+ newEvent.SetEventType(wxEVT_SCROLLWIN_PAGEDOWN);
break;
case WXK_HOME:
- Scroll(0, event.ControlDown() ? 0 : -1);
+ newEvent.SetEventType(wxEVT_SCROLLWIN_TOP);
+
+ sendHorizontalToo = event.ControlDown();
break;
case WXK_END:
- Scroll(szx - clix, event.ControlDown() ? szy - cliy : -1);
- break;
+ newEvent.SetEventType(wxEVT_SCROLLWIN_BOTTOM);
- case WXK_UP:
- Scroll(-1, sty - 1);
- break;
-
- case WXK_DOWN:
- Scroll(-1, sty + 1);
+ sendHorizontalToo = event.ControlDown();
break;
case WXK_LEFT:
- Scroll(stx - 1, -1);
+ newEvent.SetOrientation(wxHORIZONTAL);
+ // fall through
+
+ case WXK_UP:
+ newEvent.SetEventType(wxEVT_SCROLLWIN_LINEUP);
break;
case WXK_RIGHT:
- Scroll(stx + 1, -1);
+ newEvent.SetOrientation(wxHORIZONTAL);
+ // fall through
+
+ case WXK_DOWN:
+ newEvent.SetEventType(wxEVT_SCROLLWIN_LINEDOWN);
break;
default:
- // not for us
+ // not a scrolling key
event.Skip();
+ return;
}
- if ( m_xScrollPosition != xScrollOld )
- {
- wxScrollWinEvent evt(wxEVT_SCROLLWIN_THUMBTRACK, m_xScrollPosition,
- wxHORIZONTAL);
- evt.SetEventObject(m_win);
- m_win->GetEventHandler()->ProcessEvent(evt);
- }
+ m_win->ProcessWindowEvent(newEvent);
- if ( m_yScrollPosition != yScrollOld )
+ if ( sendHorizontalToo )
{
- wxScrollWinEvent evt(wxEVT_SCROLLWIN_THUMBTRACK, m_yScrollPosition,
- wxVERTICAL);
- evt.SetEventObject(m_win);
- m_win->GetEventHandler()->ProcessEvent(evt);
+ newEvent.SetOrientation(wxHORIZONTAL);
+ m_win->ProcessWindowEvent(newEvent);
}
}
void wxScrollHelperBase::StopAutoScrolling()
{
#if wxUSE_TIMER
- if ( m_timerAutoScroll )
- {
- delete m_timerAutoScroll;
- m_timerAutoScroll = NULL;
- }
+ wxDELETE(m_timerAutoScroll);
#endif
}
// but seems to happen sometimes under wxMSW - maybe it's a bug
// there but for now just ignore it
- //wxFAIL_MSG( _T("can't understand where has mouse gone") );
+ //wxFAIL_MSG( wxT("can't understand where has mouse gone") );
return;
}
projects / wxWidgets.git / blobdiff