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timeline: fix grey background artifact when enlarging window

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This commit is contained in:
René Stadler 2011-09-09 21:47:16 +02:00 committed by Stefan Sauer
parent 05aa65551a
commit c89cada72a
1 changed files with 37 additions and 3 deletions
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40
debug-viewer/GstDebugViewer/Plugins/Timeline.py
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@ -426,6 +426,7 @@ class TimelineWidget (gtk.DrawingArea):
self.model = None
self.__offscreen = None
self.__offscreen_size = (0, 0)
self.__position_ts_range = None
@ -446,7 +447,9 @@ class TimelineWidget (gtk.DrawingArea):
x, y, w, h = self.get_allocation ()
self.__offscreen = gtk.gdk.Pixmap (self.window, w, h, -1)
self.__offscreen_size = (w, h)
if not self.__offscreen:
self.__offscreen_size = (0, 0)
raise ValueError ("could not obtain pixmap")
def __redraw (self):
@ -455,7 +458,7 @@ class TimelineWidget (gtk.DrawingArea):
return
self.__ensure_offscreen ()
self.__draw (self.__offscreen)
self.__draw_offscreen ()
self.__update_from_offscreen ()
def __update_from_offscreen (self, rect = None):
@ -466,6 +469,35 @@ class TimelineWidget (gtk.DrawingArea):
if self.__offscreen is None:
self.__redraw ()
x, y, w, h = self.get_allocation ()
off_w, off_h = self.__offscreen_size
# Fill the background (where the offscreen pixmap doesn't fit) with
# white. This happens after enlarging the window, until all sentinels
# have finished running.
draw_background = True
if off_w >= w and off_h >= h:
draw_background = False
if draw_background:
ctx = self.window.cairo_create ()
if rect:
ctx.rectangle (rect.x, rect.y,
rect.x + rect.width,
rect.y + rect.height)
ctx.clip ()
if off_w < w:
ctx.rectangle (off_w, 0, w, off_h)
if off_h < h:
ctx.new_path ()
ctx.rectangle (0, off_h, w, h)
ctx.set_line_width (0.)
ctx.set_source_rgb (1., 1., 1.)
ctx.fill ()
gc = gtk.gdk.GC (self.window)
if rect is None:
self.window.draw_drawable (gc, self.__offscreen, 0, 0, 0, 0, -1, -1)
@ -513,10 +545,12 @@ class TimelineWidget (gtk.DrawingArea):
time_per_pixel = self.process.freq_sentinel.step
return 32 # FIXME use self.freq_sentinel.step and len (self.process.freq_sentinel.data)
def __draw (self, drawable):
def __draw_offscreen (self):
drawable = self.__offscreen
w, h = self.__offscreen_size
ctx = drawable.cairo_create ()
x, y, w, h = self.get_allocation ()
# White background rectangle.
ctx.set_line_width (0.)