Show a message on the playlist when a search yielded no matches.

src/playlist/playlistcontainer.cpp

@@ -24,6 +24,7 @@
 #include <QSettings>
 #include <QTimeLine>
 #include <QSortFilterProxyModel>
+#include <QLabel>
 
 const char* PlaylistContainer::kSettingsGroup = "Playlist";
 
@@ -34,10 +35,30 @@ PlaylistContainer::PlaylistContainer(QWidget *parent)
     redo_(NULL),
     starting_up_(true),
     tab_bar_visible_(false),
-    tab_bar_animation_(new QTimeLine(500, this))
+    tab_bar_animation_(new QTimeLine(500, this)),
+    no_matches_label_(new QLabel(this))
 {
   ui_->setupUi(this);
 
+  no_matches_label_->setText(tr("No matches found.  Clear the search box to show the whole playlist again."));
+  no_matches_label_->setAlignment(Qt::AlignTop | Qt::AlignHCenter);
+  no_matches_label_->setAttribute(Qt::WA_TransparentForMouseEvents);
+  no_matches_label_->setWordWrap(true);
+  no_matches_label_->raise();
+  no_matches_label_->hide();
+
+  // Set the colour of the no matches label to the disabled text colour
+  QPalette no_matches_palette = no_matches_label_->palette();
+  no_matches_palette.setColor(
+      QPalette::Normal, QPalette::WindowText,
+      no_matches_palette.color(QPalette::Disabled, QPalette::Text));
+  no_matches_label_->setPalette(no_matches_palette);
+
+  // Make it bold
+  QFont no_matches_font = no_matches_label_->font();
+  no_matches_font.setBold(true);
+  no_matches_label_->setFont(no_matches_font);
+
   settings_.beginGroup(kSettingsGroup);
 
   // Icons
@@ -236,4 +257,31 @@ void PlaylistContainer::SetTabBarHeight(int height) {
 
 void PlaylistContainer::UpdateFilter() {
   manager_->current()->proxy()->setFilterFixedString(ui_->filter->text());
+
+  bool no_matches = manager_->current()->proxy()->rowCount() == 0 &&
+                    manager_->current()->rowCount() > 0;
+
+  if (no_matches)
+    RepositionNoMatchesLabel(true);
+  no_matches_label_->setVisible(no_matches);
+}
+
+void PlaylistContainer::resizeEvent(QResizeEvent* e) {
+  QWidget::resizeEvent(e);
+  RepositionNoMatchesLabel();
+}
+
+void PlaylistContainer::RepositionNoMatchesLabel(bool force) {
+  if (!force && !no_matches_label_->isVisible())
+    return;
+
+  const int kBorder = 10;
+
+  QPoint pos = ui_->playlist->viewport()->mapTo(this, QPoint(kBorder, kBorder));
+  QSize size = ui_->playlist->viewport()->size();
+  size.setWidth(size.width() - kBorder * 2);
+  size.setHeight(size.height() - kBorder * 2);
+
+  no_matches_label_->move(pos);
+  no_matches_label_->resize(size);
 }

src/playlist/playlistcontainer.h

@@ -27,6 +27,7 @@ class PlaylistManager;
 class PlaylistView;
 
 class QTimeLine;
+class QLabel;
 
 class PlaylistContainer : public QWidget {
   Q_OBJECT
@@ -50,6 +51,10 @@ signals:
 
   void UndoRedoActionsChanged(QAction* undo, QAction* redo);
 
+protected:
+  // QWidget
+  void resizeEvent(QResizeEvent *);
+
 private slots:
   void ClearFilter();
   void NewPlaylist();
@@ -74,6 +79,7 @@ private slots:
 
 private:
   void UpdateActiveIcon(const QIcon& icon);
+  void RepositionNoMatchesLabel(bool force = false);
 
 private:
   Ui_PlaylistContainer* ui_;
@@ -87,6 +93,8 @@ private:
 
   bool tab_bar_visible_;
   QTimeLine* tab_bar_animation_;
+
+  QLabel* no_matches_label_;
 };
 
 #endif // PLAYLISTCONTAINER_H

src/translations/ar.po

@@ -327,6 +327,10 @@ msgstr "حُرِرَ بِتاريخ"
 msgid "Date created"
 msgstr "تاريخ الإنشاء"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/cs.po

@@ -328,6 +328,10 @@ msgstr "Datum úprav"
 msgid "Date created"
 msgstr "Datum vytvoření"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/da.po

@@ -330,6 +330,10 @@ msgstr "Ændringsdato"
 msgid "Date created"
 msgstr "Oprettelsesdato"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/de.po

@@ -327,6 +327,10 @@ msgstr "Geändert"
 msgid "Date created"
 msgstr "Erstellt"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/el.po

@@ -330,6 +330,10 @@ msgstr "Ημερομηνία τροποποίησης"
 msgid "Date created"
 msgstr "Ημερομηνία δημιουργίας"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/en_GB.po

@@ -327,6 +327,10 @@ msgstr "Date modified"
 msgid "Date created"
 msgstr "Date created"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/es.po

@@ -333,6 +333,10 @@ msgstr "Fecha de modificación"
 msgid "Date created"
 msgstr "Fecha de creación"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/fi.po

@@ -327,6 +327,10 @@ msgstr "Muokattu"
 msgid "Date created"
 msgstr "Luotu"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/fr.po

@@ -332,6 +332,10 @@ msgstr "Date de modification"
 msgid "Date created"
 msgstr "Date de création"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/gl.po

@@ -327,6 +327,10 @@ msgstr "Data de alterazón"
 msgid "Date created"
 msgstr "Data de criazón"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/it.po

@@ -330,6 +330,10 @@ msgstr "Data di creazione"
 msgid "Date created"
 msgstr "Data di modifica"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/kk.po

@@ -327,6 +327,10 @@ msgstr ""
 msgid "Date created"
 msgstr ""
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/nb.po

@@ -328,6 +328,10 @@ msgstr "Endringsdato"
 msgid "Date created"
 msgstr "Laget dato"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/oc.po

@@ -327,6 +327,10 @@ msgstr "Data de modificacion"
 msgid "Date created"
 msgstr ""
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/pl.po

@@ -328,6 +328,10 @@ msgstr "Data modyfikacji"
 msgid "Date created"
 msgstr "Data utworzenia"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/pt.po

@@ -327,6 +327,10 @@ msgstr "Data de alteração"
 msgid "Date created"
 msgstr "Data de criação"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/pt_BR.po

@@ -327,6 +327,10 @@ msgstr "Data de modificação"
 msgid "Date created"
 msgstr "Data de criação"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/ro.po

@@ -327,6 +327,10 @@ msgstr "Data modificării"
 msgid "Date created"
 msgstr "Data creării"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/ru.po

@@ -327,6 +327,10 @@ msgstr "Дата изменения"
 msgid "Date created"
 msgstr "Дата создания"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/sk.po

@@ -328,6 +328,10 @@ msgstr "Dátum zmeny"
 msgid "Date created"
 msgstr "Dátum vytvorenia"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/sv.po

@@ -329,6 +329,10 @@ msgstr "Datum ändrat"
 msgid "Date created"
 msgstr "Datum skapat"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/tr.po

@@ -327,6 +327,10 @@ msgstr ""
 msgid "Date created"
 msgstr "Oluşturulduğu tarih"
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/translations.pot

@@ -318,6 +318,10 @@ msgstr ""
 msgid "Date created"
 msgstr ""
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""
 

src/translations/zh_TW.po

@@ -327,6 +327,10 @@ msgstr ""
 msgid "Date created"
 msgstr ""
 
+msgid ""
+"No matches found.  Clear the search box to show the whole playlist again."
+msgstr ""
+
 msgid "New playlist"
 msgstr ""