mirror of
https://github.com/Ryujinx/GtkSharp.git
synced 2024-09-09 08:23:19 +02:00
167 lines
5.5 KiB
C#
167 lines
5.5 KiB
C#
using GtkSharp;
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namespace Gtk
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{
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using System;
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using System.Runtime.InteropServices;
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public partial class CellRenderer
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{
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static GetSizeNativeDelegate GetSize_cb_delegate;
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static GetSizeNativeDelegate GetSizeVMCallback {
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get {
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if (GetSize_cb_delegate == null)
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GetSize_cb_delegate = new GetSizeNativeDelegate (GetSize_cb);
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return GetSize_cb_delegate;
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}
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}
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static void OverrideGetSize (GLib.GType gtype)
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{
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OverrideGetSize (gtype, GetSizeVMCallback);
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}
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/// <summary>
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/// sets callback GetSize in GtkCellRendererClass-Struct
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/// </summary>
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/// <param name="gtype"></param>
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/// <param name="callback"></param>
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static void OverrideGetSize (GLib.GType gtype, GetSizeNativeDelegate callback)
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{
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unsafe {
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IntPtr* raw_ptr = (IntPtr*) (((long) gtype.GetClassPtr ()) + (long) class_abi.GetFieldOffset ("get_size"));
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*raw_ptr = Marshal.GetFunctionPointerForDelegate ((Delegate) callback);
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}
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}
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// 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"
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[UnmanagedFunctionPointer (CallingConvention.Cdecl)]
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internal delegate void GetSizeNativeDelegate (IntPtr item, IntPtr widget, IntPtr cell_area_ptr, IntPtr x_offset, IntPtr y_offset, IntPtr width, IntPtr height);
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static void GetSize_cb (IntPtr item, IntPtr widget, IntPtr cell_area_ptr, IntPtr x_offset, IntPtr y_offset, IntPtr width, IntPtr height)
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{
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try {
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CellRenderer obj = GLib.Object.GetObject (item, false) as CellRenderer;
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Gtk.Widget widg = GLib.Object.GetObject (widget, false) as Gtk.Widget;
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Gdk.Rectangle cell_area = Gdk.Rectangle.Zero;
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if (cell_area_ptr != IntPtr.Zero)
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cell_area = Gdk.Rectangle.New (cell_area_ptr);
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int a, b, c, d;
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obj.OnGetSize (widg, ref cell_area, out a, out b, out c, out d);
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if (x_offset != IntPtr.Zero)
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Marshal.WriteInt32 (x_offset, a);
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if (y_offset != IntPtr.Zero)
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Marshal.WriteInt32 (y_offset, b);
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if (width != IntPtr.Zero)
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Marshal.WriteInt32 (width, c);
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if (height != IntPtr.Zero)
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Marshal.WriteInt32 (height, d);
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} catch (Exception e) {
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GLib.ExceptionManager.RaiseUnhandledException (e, false);
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}
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}
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[GLib.DefaultSignalHandler (Type = typeof(Gtk.CellRenderer), ConnectionMethod = nameof(OverrideGetSize))]
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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)
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{
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InternalOnGetSize (widget, ref cell_area, out x_offset, out y_offset, out width, out height);
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}
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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)
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{
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IntPtr native_cell_area = GLib.Marshaller.StructureToPtrAlloc (cell_area);
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gtksharp_cellrenderer_base_get_size (Handle, widget?.Handle ?? IntPtr.Zero, native_cell_area, out x_offset, out y_offset, out width, out height);
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cell_area = Gdk.Rectangle.New (native_cell_area);
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Marshal.FreeHGlobal (native_cell_area);
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}
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static GetSizeNativeDelegate InternalGetSizeNativeDelegate (GLib.GType gtype)
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{
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GetSizeNativeDelegate unmanaged = null;
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unsafe {
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IntPtr* raw_ptr = (IntPtr*) (((long) gtype.GetClassPtr ()) + (long) class_abi.GetFieldOffset ("get_size"));
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if (*raw_ptr == IntPtr.Zero)
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return default;
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unmanaged = Marshal.GetDelegateForFunctionPointer<GetSizeNativeDelegate> (*raw_ptr);
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}
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return unmanaged;
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}
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static 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)
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{
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/*
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const gchar *__gtype_prefix = "__gtksharp_";
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#define HAS_PREFIX(a) (*((guint64 *)(a)) == *((guint64 *) __gtype_prefix))
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static GObjectClass *
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get_threshold_class (GObject *obj)
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{
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GType gtype = G_TYPE_FROM_INSTANCE (obj);
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while (HAS_PREFIX (g_type_name (gtype)))
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gtype = g_type_parent (gtype);
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GObjectClass *klass = g_type_class_peek (gtype);
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if (klass == NULL) klass = g_type_class_ref (gtype);
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return klass;
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}
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void gtksharp_cellrenderer_base_get_size (GtkCellRenderer *cell, GtkWidget *widget, GdkRectangle *cell_area, gint *x_offset, gint *y_offset, gint *width, gint *height)
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{
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GtkCellRendererClass *klass = (GtkCellRendererClass *) get_threshold_class (G_OBJECT (cell));
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if (klass->get_size)
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(* klass->get_size) (cell, widget, cell_area, x_offset, y_offset, width, height);
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}
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*/
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x_offset = 0;
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y_offset = 0;
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width = 0;
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height = 0;
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if (cell == IntPtr.Zero) {
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return;
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}
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var obj = TryGetObject (cell);
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var parent = obj.NativeType;
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while ((parent = parent.GetBaseType ()) != GLib.GType.None) {
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if (parent.ToString ().StartsWith ("__gtksharp_")) {
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continue;
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}
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var GetSize = InternalGetSizeNativeDelegate (parent);
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if (GetSize != default) {
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var a = Marshal.AllocHGlobal (sizeof(int));
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var b = Marshal.AllocHGlobal (sizeof(int));
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var c = Marshal.AllocHGlobal (sizeof(int));
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var d = Marshal.AllocHGlobal (sizeof(int));
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try {
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GetSize (cell, widget, cell_area, a, b, c, d);
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if (a != IntPtr.Zero)
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Marshal.WriteInt32 (a, x_offset);
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if (b != IntPtr.Zero)
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Marshal.WriteInt32 (b, y_offset);
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if (c != IntPtr.Zero)
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Marshal.WriteInt32 (c, width);
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if (d != IntPtr.Zero)
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Marshal.WriteInt32 (d, height);
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} finally {
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Marshal.FreeHGlobal (a);
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Marshal.FreeHGlobal (b);
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Marshal.FreeHGlobal (c);
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Marshal.FreeHGlobal (d);
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}
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}
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return;
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}
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}
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}
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} |