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--- hackish_pygtk_things [2008/12/23 00:59] – tested pietro
+++ hackish_pygtk_things [2009/01/09 15:22] (versione attuale) – treeviews pietro
@@ Linea 22: / Linea 22: @@
 ==== Motion hints ====
-According to the laconic [[file:///usr/share/gtk-doc/html/pygtk/class-gdkevent.html#description-gdkevent|official documentation]] and on the [[http://www.pygtk.org/pygtk2tutorial/sec-EventHandling.html|tutorial]], the goal of gtk.gdk.POINTER_MOTION_HINT_MASK is to send you a motion event and then not send another until you call mywidget.get_pointer(), so that events don't keep queuing waiting for you to handle them.
+According to the laconic [[http://www.pygtk.org/docs/pygtk/class-gdkevent.html#description-gdkevent|official documentation]] and on the [[http://www.pygtk.org/pygtk2tutorial/sec-EventHandling.html|tutorial]], the goal of gtk.gdk.POINTER_MOTION_HINT_MASK is to send you a motion event and then not send another until you call mywidget.get_pointer(), so that events don't keep queuing waiting for you to handle them.
 However, this is plainly false in pygtk 2.13.0, where instead:
   * if you only add gtk.gdk.POINTER_MOTION_HINT_MASK to your event mask, you handler for "motion_notify_event" is //never// called,
-  * if you instead add gtk.gdk.POINTER_MOTION_HINT_MASK | gtk.gdk.POINTER_MOTION_MASK , your handler is called lots of times, even if you don't call get_pointer()
+  * if you instead add gtk.gdk.POINTER_MOTION_HINT_MASK | gtk.gdk.POINTER_MOTION_MASK , your handler is called lots of times, even if you don't call get_pointer() (and though every event received has the "is_hint" argument set).
 There are 3 possible explanations:
@@ Linea 34: / Linea 34: @@
 I see 2 or 3 as more probable, because the widget provided in [[http://www.pygtk.org/articles/writing-a-custom-widget-using-pygtk/writing-a-custom-widget-using-pygtk.htm|this article]] currently doesn't work (tested on Ubuntu Intrepid, Ubuntu Hardy, OpenSolaris 08-11).
+Moreover, since [[http://library.gnome.org/devel/gdk/stable/gdk-Events.html#gdk-event-request-motions|C gtk+ documentation]] tells the same thing (with some more particulars), I definitely see 3 as most probable.
+====== TreeViews and CellRenderers ======
+The 'hadjustment' property of a gtk.TreeView is a gtk.Adjustment which shifts the whole treeview left. Can't find a reason for it.
+The 'expander-size' style property just changes the height of rows: try for example
+    gtk.rc_parse_string("""    style "expander-big" {
+        GtkTreeView::expander-size = 30
+    }
+    class "GtkTreeView" style "expander-big"
+  """)