Re: With set_event_compression, most recent motion event is held in waiting
Kjell Ahlstedt via gtkmm-list <[email protected]> Tue, 24 May 2022 19:24:10 +0200
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I made a few changes in gtk/gdk/gdkevents.c,
_gdk_event_queue_handle_motion_compression().
gdk_frame_clock_request_phase (clock,
GDK_FRAME_CLOCK_PHASE_FLUSH_EVENTS) at the end of the function is always
called. Without event compression I get an output such as
276 motion 122.582:89.4453
277 motion 123.582:88.4453
278 motion 124.582:88.4453
279 motion 124.582:87.4453
Then when I press a mouse button:
(example:17002): Gdk-CRITICAL **: 19:11:02.499:
gdk_window_get_frame_clock: assertion 'GDK_IS_WINDOW (window)' failed
280 button pressed 124.582:87.4453
(example:17002): Gdk-CRITICAL **: 19:11:02.587:
gdk_window_get_frame_clock: assertion 'GDK_IS_WINDOW (window)' failed
281 button released 124.582:87.4453
The same coordinates as in the last motion event. No motion event when
the mouse button is pressed.
The critical messages show that my changes of
_gdk_event_queue_handle_motion_compression() is not the right solution,
but the behavior shows (I believe) that the last motion event before the
mouse click is available somewhere in GTK before the mouse is clicked.
Den 2022-05-24 kl. 03:40, skrev JLM via gtkmm-list:
> I have managed to cobble together a program in C which does the same
> thing and confirmed that it is not a specific GTKMM problem at least.
>
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<p><font size="2">I made a few changes in gtk/gdk/gdkevents.c,
_gdk_event_queue_handle_motion_compression().
gdk_frame_clock_request_phase (clock,
GDK_FRAME_CLOCK_PHASE_FLUSH_EVENTS) at the end of the function
is always called. Without event compression I get an output such
as</font></p>
<p><font size="2">276 motion 122.582:89.4453 <br>
277 motion 123.582:88.4453 <br>
278 motion 124.582:88.4453 <br>
279 motion 124.582:87.4453 <br>
</font></p>
<p><font size="2">Then when I press a mouse button:</font></p>
<p><font size="2">(example:17002): Gdk-CRITICAL **: 19:11:02.499:
gdk_window_get_frame_clock: assertion 'GDK_IS_WINDOW (window)'
failed <br>
280 button pressed 124.582:87.4453 <br>
<br>
(example:17002): Gdk-CRITICAL **: 19:11:02.587:
gdk_window_get_frame_clock: assertion 'GDK_IS_WINDOW (window)'
failed <br>
281 button released 124.582:87.4453 <br>
</font></p>
<p><font size="2">The same coordinates as in the last motion event.
No motion event when the mouse button is pressed.</font></p>
<p><font size="2">The critical messages show that my changes of
_gdk_event_queue_handle_motion_compression() is not the right
solution, but the behavior shows (I believe) that the last
motion event before the mouse click is available somewhere in
GTK before the mouse is clicked.<br>
</font></p>
<div class="moz-cite-prefix"><font size="2">Den 2022-05-24 kl.
03:40, skrev JLM via gtkmm-list:<br>
</font></div>
<blockquote type="cite"
cite="mid:[email protected]">
<pre class="moz-quote-pre" wrap="">I have managed to cobble together a program in C which does the same
thing and confirmed that it is not a specific GTKMM problem at least.
</pre>
</blockquote>
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