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//
// CellRenderer.cs - Gtk CellRenderer class customizations
//
// Author: Todd Berman <tberman@sevenl.net>,
// Peter Johanson <peter@peterjohanson.com>
//
// Copyright (C) 2004 Todd Berman
// Copyright (C) 2007 Peter Johanson
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 2 of the Lesser GNU General
// Public License as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
namespace Gtk {
using System;
using System.Runtime.InteropServices;
public partial class CellRenderer {
[DllImport (Global.GtkNativeDll, CallingConvention = CallingConvention.Cdecl)]
static extern IntPtr gtk_cell_renderer_start_editing (IntPtr handle, IntPtr evnt, IntPtr widget, IntPtr path, ref Gdk.Rectangle bg_area, ref Gdk.Rectangle cell_area, int flags);
public ICellEditable StartEditing (Widget widget, Gdk.Event evnt, string path, Gdk.Rectangle background_area, Gdk.Rectangle cell_area, CellRendererState flags)
{
IntPtr native = GLib.Marshaller.StringToPtrGStrdup (path);
IntPtr raw_ret = gtk_cell_renderer_start_editing (Handle, evnt != null ? evnt.Handle : IntPtr.Zero, widget.Handle, native, ref background_area, ref cell_area, (int) flags);
GLib.Marshaller.Free (native);
var ret = (ICellEditable) GLib.Object.GetObject (raw_ret);
return ret;
}
[DllImport (Global.GtkNativeDll, CallingConvention = CallingConvention.Cdecl)]
static extern void gtk_cell_renderer_render (IntPtr handle, IntPtr drawable, IntPtr widget, ref Gdk.Rectangle bg_area, ref Gdk.Rectangle cell_area, ref Gdk.Rectangle expose_area, int flags);
public void Render (Cairo.Context context, Widget widget, Gdk.Rectangle background_area, Gdk.Rectangle cell_area, Gdk.Rectangle expose_area, CellRendererState flags)
{
gtk_cell_renderer_render (Handle, context == null ? IntPtr.Zero : context.Handle, widget == null ? IntPtr.Zero : widget.Handle, ref background_area, ref cell_area, ref expose_area, (int) flags);
}
// We have to implement this VM manually because x_offset, y_offset, width and height params may be NULL and therefore cannot be treated as "out int"
// TODO: Implement "nullable" attribute for value type parameters in GAPI
[UnmanagedFunctionPointer (CallingConvention.Cdecl)]
delegate void OnGetSizeDelegate (IntPtr item, IntPtr widget, IntPtr cell_area_ptr, IntPtr x_offset, IntPtr y_offset, IntPtr width, IntPtr height);
static void OnGetSize_cb (IntPtr item, IntPtr widget, IntPtr cell_area_ptr, IntPtr x_offset, IntPtr y_offset, IntPtr width, IntPtr height)
{
try {
CellRenderer obj = GLib.Object.GetObject (item, false) as CellRenderer;
Gtk.Widget widg = GLib.Object.GetObject (widget, false) as Gtk.Widget;
Gdk.Rectangle cell_area = Gdk.Rectangle.Zero;
if (cell_area_ptr != IntPtr.Zero)
cell_area = Gdk.Rectangle.New (cell_area_ptr);
int a, b, c, d;
obj.OnGetSize (widg, ref cell_area, out a, out b, out c, out d);
if (x_offset != IntPtr.Zero)
Marshal.WriteInt32 (x_offset, a);
if (y_offset != IntPtr.Zero)
Marshal.WriteInt32 (y_offset, b);
if (width != IntPtr.Zero)
Marshal.WriteInt32 (width, c);
if (height != IntPtr.Zero)
Marshal.WriteInt32 (height, d);
} catch (Exception e) {
GLib.ExceptionManager.RaiseUnhandledException (e, false);
}
}
[DllImport("gtksharpglue-3")]
static extern void gtksharp_cellrenderer_override_get_size (IntPtr gtype, OnGetSizeDelegate cb);
static OnGetSizeDelegate OnGetSizeCallback;
static void OverrideOnGetSize (GLib.GType gtype)
{
if (OnGetSizeCallback == null)
OnGetSizeCallback = new OnGetSizeDelegate (OnGetSize_cb);
gtksharp_cellrenderer_override_get_size (gtype.Val, OnGetSizeCallback);
}
[GLib.DefaultSignalHandler (Type=typeof(Gtk.CellRenderer), ConnectionMethod="OverrideOnGetSize")]
protected virtual void OnGetSize (Gtk.Widget widget, ref Gdk.Rectangle cell_area, out int x_offset, out int y_offset, out int width, out int height)
{
InternalOnGetSize (widget, ref cell_area, out x_offset, out y_offset, out width, out height);
}
[DllImport("gtksharpglue-3")]
static extern void gtksharp_cellrenderer_base_get_size (IntPtr cell, IntPtr widget, IntPtr cell_area, out int x_offset, out int y_offset, out int width, out int height);
private void InternalOnGetSize (Gtk.Widget widget, ref Gdk.Rectangle cell_area, out int x_offset, out int y_offset, out int width, out int height)
{
IntPtr native_cell_area = GLib.Marshaller.StructureToPtrAlloc (cell_area);
gtksharp_cellrenderer_base_get_size (Handle, widget == null ? IntPtr.Zero : widget.Handle, native_cell_area, out x_offset, out y_offset, out width, out height);
cell_area = Gdk.Rectangle.New (native_cell_area);
Marshal.FreeHGlobal (native_cell_area);
}
}
}
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