How to force wxToolbar background color under OS X ?

[eranon]

Hello,

I have several wxToolbar for which I would like to force the background color. It works under Windows using SetBackgroundColour(), but this way seems to have no effect under OS X (tested under OS X 10.8 and wxWidgets 3.0.0).

Also, knowing my toolbars are with a 16x16 px buttons (and not positionned at standard locations), I indicated to not use the native control (using call below during app-init). However, with or without this, SetBackgroundColour is ignored (see EDIT1) :

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wxSystemOptions::SetOption("mac.toolbar.no-native", 1);

So, does OS X is a specific case (what a surprise - huuuu) ? There's not any warning in the SetBackgroundColour()'s documentation. Is there a special trick to know... Should I derive wxToolbar and override a specific virtual method or just handle the EVT_ERASE_BACKGROUND through Bind() or Connect() ?

What's the right way to follow for Mac, please ?

--
EDIT1 : Well, certainly that without "mac.toolbar.no-native" I'm with non-native toolbar too (implicitely), because the toolbar is not directly a frame's child. So, the question remains : how to force background color of a non-native wxToolbar under OSX.

[eranon]

Tried handling EVT_ERASE_BACKGROUND like this and still no background color change

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/* use of connect rather than bind is done willingly here ;) */
bar1->Connect(wxID_ANY, wxEVT_ERASE_BACKGROUND, wxEraseEventHandler(MyFrame::OnToolbarEraseBackground), NULL, this);

void MyFrame::OnToolbarEraseBackground(wxEraseEvent &event)
{
    // Force background color of the given toolbar
    wxDC* pdc = event.GetDC();
    wxBrush brush(wxColour(255,0,0));   // red during test only :)
    pdc->SetBackground(brush);
    pdc->Clear();
    /* no skip event to prevent default system behavior */
}

The event handler is well fired and event.GetId() well return the right ID (so, no mistake about concerned toolbar), but the background color doesn't change (still the OSX's dark-grey)

[eranon]

Succeeded providing a wxEVT_PAINT handler rather than a EVT_ERASE_BACKGROUND one.

[alan93]

and yet wxEVT_PAINT event has no GetDC().

Can I ask how you worked that out? I think I could use that.

[eranif]

You just need to construct a wxPaintDC On the stack and use that

[alan93]

Great thanks, I'll try that.

[alan93]

This didn't work for me

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bar1->Connect(wxID_ANY, wxEVT_PAINT, wxPaintEventHandler( MyFrame::OnToolbarEraseBackground), NULL, this->GetEventHandler() );

void MyFrame::OnToolbarEraseBackground(wxPaintEvent &event) // doesn't execute
{
    // Force background color of the given toolbar
    wxPaintDC dc(this) ;
    wxBrush brush(wxColour(255,0,0));   // red during test only :)
    dc.SetBackground(brush);
    dc.Clear();
    /* no skip event to prevent default system behavior */
}

[eranon]

Hello,

I just see your MP on 12 Aug 2014 now (oops). Not came here since a long time. Well, I take a look at my code... wait a "minute"...

OK, here is the way I gone :

Code: Select all

#ifdef __WXOSX__
void DedeeFrame::OnToolbarPaint(wxPaintEvent &event)
{
    // Forces color of the given toolbar
    // REF : inspired by <wxWidgets-3.0.0>/src/osx/cocoa/toolbar.mm:OnPaint()
    // NB : here, the wxTB_LEFT/RIGHT/BOTTOM/TOP are ignored (if needed ***LATER, see in original REF source)
    wxWindow* pWnd = (wxWindow*) event.GetEventObject();
    wxPaintDC dc(pWnd);

    wxBrush brush(pWnd->GetParent()->GetBackgroundColour());
    dc.SetBackground(brush);
    dc.Clear();

    /* no event skip to prevent default system color */
}
#endif // __WXOSX__

[cutecode]

hello, eranon

I put your code in my wxAuiToolBar. The toolbar indeed pained with frame colour, but no buttons are displaied.
Could you, pleese, help me how to show the buttons, too?

[cutecode]

got it, I should overwite wxAuiToolBarArt

thx