Improve Ux for the places panel's hidden items

Summary:
BUG: 400860
FIXED-IN: 18.12.0

Clean up the context menu for the places panel.
 - Change Text "Show All Entries" -> "Show Hidden Places"
 - Use State dependent icon (like hidden files)
 - Disable instead of hide if not places are hidden.
 - Toggle to unchecked if last item of group is unhidden.

Create a copy of this "Show Hidden Places" entry in the main dolphin menu View->Places.

Test Plan:
With Hidden Places
{F6398756}
{F6398759}
Context Menu:
{F6398762}
{F6398761}

Without Hidden Places.
{F6414694}
{F6414696}

Reviewers: #dolphin, #vdg, elvisangelaccio, ngraham

Reviewed By: #dolphin, #vdg, elvisangelaccio, ngraham

Subscribers: cfeck, elvisangelaccio, veqz, davidc, ngraham, kfm-devel

Tags: #dolphin

Maniphest Tasks: T8349

Differential Revision: https://phabricator.kde.org/D16767

1 files changed, 3 insertions, 0 deletions

diff --git a/src/panels/places/placespanel.h b/src/panels/places/placespanel.h
index c6f959d23..9d9624ff8 100644
--- a/src/panels/places/placespanel.h
+++ b/src/panels/places/placespanel.h
@@ -49,6 +49,7 @@ signals:
     void errorMessage(const QString& error);
     void storageTearDownRequested(const QString& mountPath);
     void storageTearDownExternallyRequested(const QString& mountPath);
+    void showHiddenEntriesChanged(bool shown);
 
 protected:
     bool urlChanged() override;
@@ -56,6 +57,8 @@ protected:
 
 public slots:
     void readSettings() override;
+    void showHiddenEntries(bool shown);
+    int hiddenListCount();
 
 private slots:
     void slotItemActivated(int index);