Merge lp:~vanvugt/mir/4-finger-release into lp:mir

[Daniel van Vugt]

Playground: Improve 4-finger swipe recognition that got broken
slightly in r2564. Now it recognises that multiple fingers might get
released simultaneously, like it used to.

Related to, but not a fix for bug 1481570.

[Chris Halse Rogers (raof)]

Seems sensible

review: Approve

[PS Jenkins bot (ps-jenkins)]

FAILED: Continuous integration, rev:2812
http://jenkins.qa.ubuntu.com/job/mir-ci/4479/
Executed test runs:
    SUCCESS: http://jenkins.qa.ubuntu.com/job/mir-android-vivid-i386-build/3411
    SUCCESS: http://s-jenkins.ubuntu-ci:8080/job/mir-clang-ts-wily-amd64-build/267
    SUCCESS: http://jenkins.qa.ubuntu.com/job/mir-clang-wily-amd64-build/939
    FAILURE: http://jenkins.qa.ubuntu.com/job/mir-mediumtests-vivid-touch/3359/console
    SUCCESS: http://jenkins.qa.ubuntu.com/job/mir-wily-amd64-ci/628
        deb: http://jenkins.qa.ubuntu.com/job/mir-wily-amd64-ci/628/artifact/work/output/*zip*/output.zip
    SUCCESS: http://jenkins.qa.ubuntu.com/job/mir-mediumtests-builder-vivid-armhf/3359
        deb: http://jenkins.qa.ubuntu.com/job/mir-mediumtests-builder-vivid-armhf/3359/artifact/work/output/*zip*/output.zip
    FAILURE: http://jenkins.qa.ubuntu.com/job/mir-mediumtests-runner-mako/6148/console
    SUCCESS: http://s-jenkins.ubuntu-ci:8080/job/touch-flash-device/22330

Click here to trigger a rebuild:
http://s-jenkins.ubuntu-ci:8080/job/mir-ci/4479/rebuild

review: Needs Fixing (continuous-integration)

[PS Jenkins bot (ps-jenkins)]

review: Approve (continuous-integration)

=== modified file 'playground/demo-shell/window_manager.cpp'
--- playground/demo-shell/window_manager.cpp	2015-06-17 05:20:42 +0000
+++ playground/demo-shell/window_manager.cpp	2015-08-05 05:08:42 +0000
@@ -477,9 +477,12 @@
 bool last_touch_released(MirTouchEvent const* tev)
 {
     auto count = mir_touch_event_point_count(tev);
-    if (count > 1)
-        return false;
-    return mir_touch_event_action(tev, 0) == mir_touch_action_up;
+    for (unsigned i = 0; i < count; ++i)
+    {
+        if (mir_touch_event_action(tev, i) != mir_touch_action_up)
+            return false;
+    }
+    return true;
 }
 }