initviz: use larger default window size with adjusted xscale

Change default window size from fixed 750x550 to 95% of screen
dimensions for better utilization of available screen space.

Increase xscale from 3.0 to 5.0 for the full tree view to compensate
for the larger window, preventing content from appearing too zoomed in.
This makes the default view more comfortable, equivalent to zooming out
about 2-3 clicks from the previous default with the larger window.

Adapted from xrmx/bootchart#42 (PATCH 018/182)

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

Author: troglobit

initviz/gui.py

@@ -735,7 +735,9 @@ def __init__(self, trace, app_options):
 
         window = self
         window.set_title("Bootchart %s" % trace.filename)
-        window.set_default_size(750, 550)
+        screen = window.get_screen()
+        window.set_default_size(int(screen.get_width() * 0.95),
+                                int(screen.get_height() * 0.95))
 
         self.trace = trace
         self.app_options = app_options
@@ -902,7 +904,7 @@ def __init__(self, trace, app_options):
         GObject.timeout_add(5000, lambda: statusbar.pop(0))
 
         full_opts = RenderOptions(app_options)
-        full_tree = PyBootchartShell(window, trace, full_opts, 3.0)
+        full_tree = PyBootchartShell(window, trace, full_opts, 5.0)
         tab_page.append_page(full_tree, gtk.Label("Full tree"))
         self.tabs = [full_tree]
 
@@ -1250,7 +1252,7 @@ def status(self, msg): print(msg)
 
         # Recreate tabs
         full_opts = draw.RenderOptions(self.app_options)
-        full_tree = PyBootchartShell(self, new_trace, full_opts, 3.0)
+        full_tree = PyBootchartShell(self, new_trace, full_opts, 5.0)
         self.tab_page.append_page(full_tree, gtk.Label("Full tree"))
         self.tabs = [full_tree]