Add a couple of compatibility hacks for GTK+-2.HEADmaster

In tree.c, if GTK_MAJOR_VERSION==2, I provide an implementation of GTK 3's
gtk_widget_get_preferred_size() for GTK 2.

In util.c, if GDK_WINDOWNING_X11 is defined, but GDK_IS_X11_DISPLAY()
isn't, I define it to always return 1.

2 files changed, 13 insertions, 0 deletions

diff --git a/src/tree.c b/src/tree.c
index a8b324f..7f20b92 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -30,6 +30,15 @@
 #include "zenity.h"
 #include "util.h"
 
+#if GTK_MAJOR_VERSION == 2
+static void
+gtk_widget_get_preferred_size (GtkWidget *widget, GtkRequisition *minimum_size, GtkRequisition *natural_size)
+{
+  gtk_widget_size_request(widget, natural_size);
+  gtk_widget_get_size_request(widget, &(minimum_size->width), &(minimum_size->height));
+}
+#endif
+
 #define MAX_ELEMENTS_BEFORE_SCROLLING 5
 #define PRINT_HIDE_COLUMN_SEPARATOR ","
 
diff --git a/src/util.c b/src/util.c
index d63aeca..23ba3ab 100644
--- a/src/util.c
+++ b/src/util.c
@@ -45,6 +45,10 @@
 #define ZENITY_ERROR_DEFAULT	-1
 #define ZENITY_EXTRA_DEFAULT	127
 
+#if defined(GDK_WINDOWING_X11) && !defined(GDK_IS_X11_DISPLAY)
+#define GDK_IS_X11_DISPLAY(display) 1
+#endif
+
 GtkBuilder*
 zenity_util_load_ui_file (const gchar *root_widget, ...)
 {