bitbake: hob: add a progress indicator when you select 'view log'

- created a new file named "hobthreads.py", defining a thread
for opening the log file in a subprocess using subprocess module;
in the future I think we will add some other threads here, to
implement some other performance issues
- on "builddetailspage", "packageselectionpage" and "imagedetailspage"
I have changed the manner for opening the log file; it uses the thread
to open the file, and on main thread it creates a dialog to show a
progress bar, which pulses till the file is open
- this was added because when the log file is big, it takes time to
be opened; on the dialog you can use "Cancel" button to terminate the
process initiated to open the file

[YOCTO #2997]
(Bitbake rev: 165362a63f085991b6bab63ab90a0c7b9bf6b784)

Signed-off-by: Cristiana Voicu <cristiana.voicu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/bitbake/lib/bb/ui/crumbs/hig.py b/bitbake/lib/bb/ui/crumbs/hig.py
index 4f4fecb58a..d030beda22 100644
--- a/bitbake/lib/bb/ui/crumbs/hig.py
+++ b/bitbake/lib/bb/ui/crumbs/hig.py
@@ -1855,6 +1855,9 @@ class ImageSelectionDialog (CrumbsDialog):
                     break
                 iter = self.image_store.iter_next(iter)
 
+#
+# ProxyDetailsDialog
+#
 class ProxyDetailsDialog (CrumbsDialog):
 
     def __init__(self, title, user, passwd, parent, flags, buttons=None):
@@ -1914,3 +1917,42 @@ class ProxyDetailsDialog (CrumbsDialog):
             else:
                 self.user = None
                 self.passwd = None
+
+
+#
+# OpeningLogDialog
+#
+class OpeningLogDialog (CrumbsDialog):
+
+    def __init__(self, title, parent, flags, buttons=None):
+        super(OpeningLogDialog, self).__init__(title, parent, flags, buttons)
+
+        self.running = False
+        # create visual elements on the dialog
+        self.create_visual_elements()
+
+    def start(self):
+        if not self.running:
+          self.running = True
+          gobject.timeout_add(100, self.pulse)
+
+    def pulse(self):
+        self.progress_bar.pulse()
+        return self.running
+
+    def create_visual_elements(self):
+        hbox = gtk.HBox(False, 12)
+        self.user_label = gtk.Label("The log will open in a text editor")
+        hbox.pack_start(self.user_label, expand=False, fill=False)
+        self.vbox.pack_start(hbox, expand=False, fill=False)
+
+        hbox = gtk.HBox(False, 12)
+        # Progress bar
+        self.progress_bar = HobProgressBar()
+        hbox.pack_start(self.progress_bar)
+        self.start()
+        self.vbox.pack_start(hbox, expand=False, fill=False)
+
+        button = self.add_button("Cancel", gtk.RESPONSE_CANCEL)
+        HobAltButton.style_button(button)
+        self.show_all()