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fix child window redraw glitches during scrolling (bug 1944002)

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53277 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Paul Cornett
2008-04-20 22:44:17 +00:00
parent 916989dfb9
commit a899707131
1 changed files with 29 additions and 6 deletions
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35
src/gtk/win_gtk.cpp
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@@ -341,6 +341,30 @@ void wxPizza::move(GtkWidget* widget, int x, int y)
}
}
struct AdjustData {
GdkWindow* window;
int dx, dy;
};
// Adjust allocations for all widgets using the GdkWindow which was just scrolled
extern "C" {
static void scroll_adjust(GtkWidget* widget, void* data)
{
const AdjustData* p = static_cast<AdjustData*>(data);
if (widget->window == p->window)
{
widget->allocation.x += p->dx;
widget->allocation.y += p->dy;
// GtkFrame requires a queue_resize, otherwise parts of
// the frame newly exposed by the scroll are not drawn.
// To be safe, do it for all widgets.
gtk_widget_queue_resize_no_redraw(widget);
if (GTK_IS_CONTAINER(widget))
gtk_container_forall(GTK_CONTAINER(widget), scroll_adjust, data);
}
}
}
void wxPizza::scroll(int dx, int dy)
{
GtkWidget* widget = GTK_WIDGET(this);
@@ -349,13 +373,12 @@ void wxPizza::scroll(int dx, int dy)
m_scroll_x -= dx;
m_scroll_y -= dy;
if (widget->window)
gdk_window_scroll(widget->window, dx, dy);
const GList* list = m_fixed.children;
if (list)
{
const GtkFixedChild* child = static_cast<GtkFixedChild*>(list->data);
// queueing a resize on any child will update them all
gtk_widget_queue_resize(child->widget);
gdk_window_scroll(widget->window, dx, dy);
// Adjust child allocations. Doing a queue_resize on the children is not
// enough, sometimes they redraw in the wrong place during fast scrolling.
AdjustData data = { widget->window, dx, dy };
gtk_container_forall(GTK_CONTAINER(widget), scroll_adjust, &data);
}
}