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make it possible to create wxWindowDC for a hidden window

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41131 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Václav Slavík
2006-09-10 15:51:03 +00:00
parent 9c72cf7619
commit 2582bcdc9d
3 changed files with 42 additions and 19 deletions
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8
include/wx/dfb/private.h
View File

@@ -41,6 +41,14 @@ enum wxDfbCloneSurfaceMode
wxDfbCloneSurface_CopyPixels
};
/**
Creates surface that is compatible with given @a surface (i.e. has same
capabilities, pixel format etc.) and has given @a size.
*/
wxIDirectFBSurfacePtr wxDfbCreateCompatibleSurface(
const wxIDirectFBSurfacePtr& surface,
const wxSize& size);
/**
Creates a new surface by cloning existing one. Depending on @a mode,
either makes exact copy (wxDfbCloneSurface_CopyPixels) or only creates a

28
src/dfb/dcclient.cpp
View File

@@ -50,28 +50,24 @@ void wxWindowDC::InitForWin(wxWindow *win, const wxRect *rect)
{
wxCHECK_RET( win, _T("invalid window") );
// FIXME: this should be made to work: we need to detect that the window
// is not visible and in that case, a) ignore any drawing actions
// and b) provide dummy surface that can still be used to get
// information (e.g. text extents):
for ( wxWindow *w = win; w; w = w->GetParent() )
{
// painting on hidden TLW when non-TLW windows are shown is OK,
// DirectFB manages that:
if ( w->IsTopLevel() )
break;
wxASSERT_MSG( w->IsShown(),
_T("painting on hidden window not implemented yet") );
}
// check if the rectangle covers full window and so is not needed:
if ( rect && *rect == wxRect(win->GetSize()) )
rect = NULL;
// obtain the surface used for painting:
wxIDirectFBSurfacePtr surface;
if ( !rect )
if ( !win->IsVisible() )
{
// we're painting on invisible window: the changes won't have any
// effect, as the window will be repainted anyhow when it is shown, but
// we still need a valid DC so that e.g. text extents can be measured,
// so let's create a dummy surface that has the same format as the real
// one would have and let the code paint on it:
wxSize size(rect ? rect->GetSize() : win->GetSize());
surface = wxDfbCreateCompatibleSurface(win->GetDfbSurface(), size);
}
else if ( !rect )
{
wxCHECK_RET( win->GetSize().x > 0 && win->GetSize().y > 0,
_T("window has invalid size") );

25
src/dfb/utils.cpp
View File

@@ -87,8 +87,9 @@ void wxClientDisplayRect(int *x, int *y, int *width, int *height)
// surface manipulation helpers
//-----------------------------------------------------------------------------
wxIDirectFBSurfacePtr wxDfbCloneSurface(const wxIDirectFBSurfacePtr& s,
wxDfbCloneSurfaceMode mode)
wxIDirectFBSurfacePtr wxDfbCreateCompatibleSurface(
const wxIDirectFBSurfacePtr& s,
const wxSize& size)
{
if ( !s )
return NULL;
@@ -97,8 +98,9 @@ wxIDirectFBSurfacePtr wxDfbCloneSurface(const wxIDirectFBSurfacePtr& s,
desc.flags = (DFBSurfaceDescriptionFlags)(
DSDESC_CAPS | DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT);
s->GetCapabilities(&desc.caps);
s->GetSize(&desc.width, &desc.height);
s->GetPixelFormat(&desc.pixelformat);
desc.width = size.x;
desc.height = size.y;
wxIDirectFBSurfacePtr snew(wxIDirectFB::Get()->CreateSurface(&desc));
if ( !snew )
@@ -114,6 +116,23 @@ wxIDirectFBSurfacePtr wxDfbCloneSurface(const wxIDirectFBSurfacePtr& s,
}
}
return snew;
}
wxIDirectFBSurfacePtr wxDfbCloneSurface(const wxIDirectFBSurfacePtr& s,
wxDfbCloneSurfaceMode mode)
{
if ( !s )
return NULL;
wxSize size;
if ( !s->GetSize(&size.x, &size.y) )
return NULL;
wxIDirectFBSurfacePtr snew(wxDfbCreateCompatibleSurface(s, size));
if ( !snew )
return NULL;
if ( mode == wxDfbCloneSurface_CopyPixels )
{
if ( !snew->SetBlittingFlags(DSBLIT_NOFX) )