Add support for alpha channel in wxColourDialog (wxGTK).
Showing opacity slider is controlled by wxColourData::GetChooseAlpha().
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@@ -65,6 +65,7 @@ bool wxColourDialog::Create(wxWindow *parent, wxColourData *data)
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gtk_color_selection_dialog_get_color_selection(
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GTK_COLOR_SELECTION_DIALOG(m_widget)));
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gtk_color_selection_set_has_palette(sel, true);
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gtk_color_selection_set_has_opacity_control(sel, m_data.GetChooseAlpha());
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return true;
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}
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