Allow dolphin to auto-play previewed media file, click on preview to play/pause videos or audio

Summary:
It is based on D19844.

I did my best to avoid glitches hence the amount of code touched.

Retry after @pekkah D7539
Moved the setting to the information panel context menu, no more timer

Settings screenshot :
{F6700220}

This would mach the same feature in the open/save dialog (although not equivalent)
{F6696456}

FEATURE: 378613
FIXED-IN: 19.08.0
GUI: New information panel context menu option

Test Plan:
Without auto play
  - in dolphin with the information panel opened, and the auto media play feature is disabled (right on the information panel)
  - hover over media files
  - the behavior is the same as before the patch

With auto play
  - in dolphin with the information panel opened, and the auto media play feature is enabled
  - hover over media files
  - media is played automatically
  - hover over another media file, the new media is previewed

Use audio or video file as media.

Reviewers: #dolphin, elvisangelaccio, ngraham

Reviewed By: #dolphin, elvisangelaccio, ngraham

Subscribers: ngraham, broulik, kfm-devel, pekkah

Tags: #dolphin

Differential Revision: https://phabricator.kde.org/D19782

1 files changed, 8 insertions, 0 deletions

diff --git a/src/panels/information/informationpanel.cpp b/src/panels/information/informationpanel.cpp
index 9a0358df0..e6c3bf32a 100644
--- a/src/panels/information/informationpanel.cpp
+++ b/src/panels/information/informationpanel.cpp
@@ -176,6 +176,11 @@ void InformationPanel::showContextMenu(const QPoint &pos)
     previewAction->setCheckable(true);
     previewAction->setChecked(InformationPanelSettings::previewsShown());
 
+    QAction* previewAutoPlayAction = popup.addAction(i18nc("@action:inmenu", "Auto-Play media files"));
+    previewAutoPlayAction->setIcon(QIcon::fromTheme(QStringLiteral("media-playback-start")));
+    previewAutoPlayAction->setCheckable(true);
+    previewAutoPlayAction->setChecked(InformationPanelSettings::previewsAutoPlay());
+
     QAction* configureAction = popup.addAction(i18nc("@action:inmenu", "Configure..."));
     configureAction->setIcon(QIcon::fromTheme(QStringLiteral("configure")));
     if (m_inConfigurationMode) {
@@ -213,6 +218,9 @@ void InformationPanel::showContextMenu(const QPoint &pos)
 
         InformationPanelSettings::setDateFormat(dateFormat);
         m_content->refreshMetaData();
+    } else if (action == previewAutoPlayAction) {
+        InformationPanelSettings::setPreviewsAutoPlay(isChecked);
+        m_content->setPreviewAutoPlay(isChecked);
     }
 }