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Generate scroll events for key presses in wxScrolledWindow.

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Don't duplicate the existing wxScrolledWindow::CalcScrollInc() logic in
HandleOnChar(), simply generate scrolling events from it, this simplifies the
code and ensures that it is more correct.

Closes #11070.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61614 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2009-08-05 17:25:14 +00:00
parent a58804eae1
commit e2495f725c
1 changed files with 33 additions and 56 deletions
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89
src/generic/scrlwing.cpp
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@@ -829,93 +829,70 @@ void wxScrollHelperBase::HandleOnPaint(wxPaintEvent& WXUNUSED(event))
// 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)
// prepare the event this key press maps to
wxScrollWinEvent newEvent;
GetViewStart(&stx, &sty);
GetTargetSize(&clix, &cliy);
m_targetWindow->GetVirtualSize(&szx, &szy);
newEvent.SetPosition(0);
newEvent.SetEventObject(m_win);
if( m_xScrollPixelsPerLine )
{
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;
}
// this is the default, it's changed to wxHORIZONTAL below if needed
newEvent.SetOrientation(wxVERTICAL);
int xScrollOld = m_xScrollPosition,
yScrollOld = m_yScrollPosition;
// 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);
}
}