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keep AdjustScrollbars from causing an infinite series of size events

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41079 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Paul Cornett
2006-09-09 02:41:29 +00:00
parent d3e6a1f2db
commit cd38dd5ba0
1 changed files with 30 additions and 7 deletions
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37
src/gtk/scrolwin.cpp
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@@ -50,9 +50,9 @@ void wxScrollHelperNative::SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,
m_xScrollPixelsPerLine = pixelsPerUnitX; m_xScrollPixelsPerLine = pixelsPerUnitX;
m_yScrollPixelsPerLine = pixelsPerUnitY; m_yScrollPixelsPerLine = pixelsPerUnitY;
m_win->m_scrollBar[0]->adjustment->value = m_win->m_scrollBar[wxWindow::ScrollDir_Horz]->adjustment->value =
m_xScrollPosition = xPos; m_xScrollPosition = xPos;
m_win->m_scrollBar[1]->adjustment->value = m_win->m_scrollBar[wxWindow::ScrollDir_Vert]->adjustment->value =
m_yScrollPosition = yPos; m_yScrollPosition = yPos;
// Setting hints here should arguably be deprecated, but without it // Setting hints here should arguably be deprecated, but without it
@@ -115,13 +115,36 @@ void wxScrollHelperNative::AdjustScrollbars()
m_targetWindow->m_hasScrolling = m_xScrollPixelsPerLine != 0 || m_yScrollPixelsPerLine != 0; m_targetWindow->m_hasScrolling = m_xScrollPixelsPerLine != 0 || m_yScrollPixelsPerLine != 0;
m_targetWindow->GetClientSize( &w, &h );
m_targetWindow->GetVirtualSize( &vw, &vh ); m_targetWindow->GetVirtualSize( &vw, &vh );
DoAdjustScrollbar(m_win->m_scrollBar[0], m_xScrollPixelsPerLine, w, vw, m_targetWindow->GetClientSize(&w, NULL);
&m_xScrollLines, &m_xScrollLinesPerPage); DoAdjustScrollbar(
DoAdjustScrollbar(m_win->m_scrollBar[1], m_yScrollPixelsPerLine, h, vh, m_win->m_scrollBar[wxWindow::ScrollDir_Horz], m_xScrollPixelsPerLine,
&m_yScrollLines, &m_yScrollLinesPerPage); w, vw, &m_xScrollLines, &m_xScrollLinesPerPage);
m_targetWindow->GetClientSize(NULL, &h);
DoAdjustScrollbar(
m_win->m_scrollBar[wxWindow::ScrollDir_Vert], m_yScrollPixelsPerLine,
h, vh, &m_yScrollLines, &m_yScrollLinesPerPage);
const int w_old = w;
m_targetWindow->GetClientSize(&w, NULL);
if (w != w_old)
{
// It is necessary to repeat the calculations in this case to avoid an
// observed infinite series of size events, involving alternating
// changes in visibility of the scrollbars.
// At this point, GTK+ has already queued a resize, which will cause
// AdjustScrollbars() to be called again. If the scrollbar visibility
// is not correct before then, yet another resize will occur, possibly
// leading to an unending series if the sizes are just right.
DoAdjustScrollbar(
m_win->m_scrollBar[wxWindow::ScrollDir_Horz], m_xScrollPixelsPerLine,
w, vw, &m_xScrollLines, &m_xScrollLinesPerPage);
m_targetWindow->GetClientSize(NULL, &h);
DoAdjustScrollbar(
m_win->m_scrollBar[wxWindow::ScrollDir_Vert], m_yScrollPixelsPerLine,
h, vh, &m_yScrollLines, &m_yScrollLinesPerPage);
}
} }
void wxScrollHelperNative::DoScroll(int orient, void wxScrollHelperNative::DoScroll(int orient,