/////////////////////////////////////////////////////////////////////////////
// Name:        src/gtk/statbox.cpp
// Purpose:
// Author:      Robert Roebling
// Copyright:   (c) 1998 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#if wxUSE_STATBOX

#include "wx/statbox.h"

#include <gtk/gtk.h>
#include "wx/gtk/private/gtk2-compat.h"
#include "wx/gtk/private/win_gtk.h"

// constants taken from GTK sources
#define LABEL_PAD 1
#define LABEL_SIDE_PAD 2

//-----------------------------------------------------------------------------
// "size_allocate" from m_widget
//-----------------------------------------------------------------------------

#ifndef __WXGTK3__
extern "C" {
static void size_allocate(GtkWidget* widget, GtkAllocation* alloc, void*)
{
    // clip label as GTK >= 2.12 does
    GtkWidget* label_widget = gtk_frame_get_label_widget(GTK_FRAME(widget));
    int w = alloc->width -
        2 * gtk_widget_get_style(widget)->xthickness - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD;
    if (w < 0)
        w = 0;

    GtkAllocation a;
    gtk_widget_get_allocation(label_widget, &a);
    if (a.width > w)
    {
        a.width = w;
        gtk_widget_size_allocate(label_widget, &a);
    }
}

static gboolean expose_event(GtkWidget* widget, GdkEventExpose*, wxWindow*)
{
    const GtkAllocation& a = widget->allocation;
    gtk_paint_flat_box(gtk_widget_get_style(widget), gtk_widget_get_window(widget),
        GTK_STATE_NORMAL, GTK_SHADOW_NONE, NULL, widget, "", a.x, a.y, a.width, a.height);
    return false;
}
}
#endif

//-----------------------------------------------------------------------------
// wxStaticBox
//-----------------------------------------------------------------------------

wxStaticBox::wxStaticBox()
{
}

wxStaticBox::wxStaticBox( wxWindow *parent,
                          wxWindowID id,
                          const wxString &label,
                          const wxPoint& pos,
                          const wxSize& size,
                          long style,
                          const wxString& name )
{
    Create( parent, id, label, pos, size, style, name );
}

bool wxStaticBox::Create( wxWindow *parent,
                          wxWindowID id,
                          const wxString& label,
                          const wxPoint& pos,
                          const wxSize& size,
                          long style,
                          const wxString& name )
{
    if (!PreCreation( parent, pos, size ) ||
        !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
    {
        wxFAIL_MSG( wxT("wxStaticBox creation failed") );
        return false;
    }

    m_widget = GTKCreateFrame(label);
    g_object_ref(m_widget);

    // only base SetLabel needs to be called after GTKCreateFrame
    wxControl::SetLabel(label);

    m_parent->DoAddChild( this );

    PostCreation(size);

    // need to set non default alignment?
    gfloat xalign = 0;
    if ( style & wxALIGN_CENTER )
        xalign = 0.5;
    else if ( style & wxALIGN_RIGHT )
        xalign = 1.0;

    gtk_frame_set_label_align(GTK_FRAME(m_widget), xalign, 0.5);

#ifndef __WXGTK3__
    if (gtk_check_version(2, 12, 0))
    {
        // we connect this signal to perform label-clipping as GTK >= 2.12 does
        g_signal_connect(m_widget, "size_allocate", G_CALLBACK(size_allocate), NULL);
    }
#endif

    m_container.DisableSelfFocus();

    return true;
}

void wxStaticBox::AddChild( wxWindowBase *child )
{
    if (!m_wxwindow)
    {
        // make this window a container of other wxWindows by instancing a wxPizza
        // and packing it into the GtkFrame:
        m_wxwindow = wxPizza::New();
        gtk_widget_show( m_wxwindow );
        gtk_container_add( GTK_CONTAINER (m_widget), m_wxwindow );
        GTKApplyWidgetStyle();
    }

    wxStaticBoxBase::AddChild(child);
}

void wxStaticBox::SetLabel( const wxString& label )
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid staticbox") );

    GTKSetLabelForFrame(GTK_FRAME(m_widget), label);
}

void wxStaticBox::DoApplyWidgetStyle(GtkRcStyle *style)
{
    GTKFrameApplyWidgetStyle(GTK_FRAME(m_widget), style);
    if (m_wxwindow)
        GTKApplyStyle(m_wxwindow, style);

#ifndef __WXGTK3__
    g_signal_handlers_disconnect_by_func(m_widget, (void*)expose_event, this);
    if (m_backgroundColour.IsOk())
        g_signal_connect(m_widget, "expose-event", G_CALLBACK(expose_event), this);
#endif
}

bool wxStaticBox::GTKWidgetNeedsMnemonic() const
{
    return true;
}

void wxStaticBox::GTKWidgetDoSetMnemonic(GtkWidget* w)
{
    GTKFrameSetMnemonicWidget(GTK_FRAME(m_widget), w);
}

// static
wxVisualAttributes
wxStaticBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
{
    return GetDefaultAttributesFromGTKWidget(gtk_frame_new(""));
}

void wxStaticBox::GetBordersForSizer(int *borderTop, int *borderOther) const
{
    GtkAllocation alloc, child_alloc;
    gtk_widget_get_allocation(m_widget, &alloc);
    const int w_save = alloc.width;
    const int h_save = alloc.height;
    if (alloc.width < 50) alloc.width = 50;
    if (alloc.height < 50) alloc.height = 50;
    gtk_widget_set_allocation(m_widget, &alloc);

    GTK_FRAME_GET_CLASS(m_widget)->compute_child_allocation(GTK_FRAME(m_widget), &child_alloc);

    alloc.width = w_save;
    alloc.height = h_save;
    gtk_widget_set_allocation(m_widget, &alloc);

    *borderTop = child_alloc.y - alloc.y;
    *borderOther = child_alloc.x - alloc.x;
}

#endif // wxUSE_STATBOX
