From: Soeren Apel <redacted>
Date: Sun, 3 Apr 2016 18:37:53 +0000 (+0200)
Subject: View: Provide a clear setup path for the initial v_offset value
X-Git-Tag: pulseview-0.4.0~322
X-Git-Url: https://sigrok.org/gitweb/?a=commitdiff_plain;ds=sidebyside;h=925763b09cd26608cf4b38ce7b44800948a0e5aa;hp=925763b09cd26608cf4b38ce7b44800948a0e5aa;p=pulseview.git

View: Provide a clear setup path for the initial v_offset value

- View::update_scroll():
  The range for the vertical scrollbar is only updated if there
  are traces in the view.

- View::set_scroll_default():
  This new function adjusts the vertical offset of the view so
  that all traces are visible. Needs to be executed once after a
  new device was selected.

- View::signals_changed():
  We want to be able to clear stale items in-between devices, so
  we no longer want to simply return when no device is selected.
  This means we need to handle a missing device more gracefully.

  Also, we now reset the vertical scroll bar when no device is
  selected and call set_scroll_default() when needed.
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