Places panel: show a tooltip after 500 ms

BUG: 426455
FIXED-IN: 20.12

src/panels/places/placespanel.cpp

@@ -39,6 +39,8 @@
 #include <QMenu>
 #include <QMimeData>
 #include <QVBoxLayout>
+#include <QToolTip>
+#include <QTimer>
 
 PlacesPanel::PlacesPanel(QWidget* parent) :
     Panel(parent),
@@ -49,8 +51,12 @@ PlacesPanel::PlacesPanel(QWidget* parent) :
     m_triggerStorageSetupButton(),
     m_itemDropEventIndex(-1),
     m_itemDropEventMimeData(nullptr),
-    m_itemDropEvent(nullptr)
+    m_itemDropEvent(nullptr),
+    m_tooltipTimer()
 {
+    m_tooltipTimer.setInterval(500);
+    m_tooltipTimer.setSingleShot(true);
+    connect(&m_tooltipTimer, &QTimer::timeout, this, &PlacesPanel::slotShowTooltip);
 }
 
 PlacesPanel::~PlacesPanel()
@@ -111,6 +117,8 @@ void PlacesPanel::showEvent(QShowEvent* event)
         m_view->setWidgetCreator(new KItemListWidgetCreator<PlacesItemListWidget>());
         m_view->setGroupHeaderCreator(new KItemListGroupHeaderCreator<PlacesItemListGroupHeader>());
 
+        installEventFilter(this);
+
         m_controller = new KItemListController(m_model, m_view, this);
         m_controller->setSelectionBehavior(KItemListController::SingleSelection);
         m_controller->setSingleClickActivationEnforced(true);
@@ -137,6 +145,21 @@ void PlacesPanel::showEvent(QShowEvent* event)
     Panel::showEvent(event);
 }
 
+bool PlacesPanel::eventFilter(QObject * /* obj */, QEvent *event)
+{
+    if (event->type() == QEvent::ToolTip) {
+
+        QHelpEvent *hoverEvent = reinterpret_cast<QHelpEvent *>(event);
+
+        m_hoveredIndex = m_view->itemAt(hoverEvent->pos());
+        m_hoverPos = mapToGlobal(hoverEvent->pos());
+
+        m_tooltipTimer.start();
+        return true;
+    }
+    return false;
+}
+
 void PlacesPanel::slotItemActivated(int index)
 {
     triggerItem(index, Qt::LeftButton);
@@ -460,6 +483,13 @@ void PlacesPanel::slotStorageSetupDone(int index, bool success)
     }
 }
 
+void PlacesPanel::slotShowTooltip()
+{
+    const QUrl url = m_model->data(m_hoveredIndex).value("url").value<QUrl>();
+    const QString text = url.isLocalFile() ? url.path() : url.toString();
+    QToolTip::showText(m_hoverPos, text);
+}
+
 void PlacesPanel::addEntry()
 {
     const int index = m_controller->selectionManager()->currentItem();

src/panels/places/placespanel.h

@@ -11,6 +11,7 @@
 #include "panels/panel.h"
 
 #include <QUrl>
+#include <QTimer>
 
 class KItemListController;
 class PlacesItemModel;
@@ -30,6 +31,8 @@ public:
     ~PlacesPanel() override;
     void proceedWithTearDown();
 
+    bool eventFilter(QObject *obj, QEvent *event) override;
+
 signals:
     void placeActivated(const QUrl& url);
     void placeMiddleClicked(const QUrl& url);
@@ -58,6 +61,7 @@ private slots:
     void slotAboveItemDropEvent(int index, QGraphicsSceneDragDropEvent* event);
     void slotUrlsDropped(const QUrl& dest, QDropEvent* event, QWidget* parent);
     void slotStorageSetupDone(int index, bool success);
+    void slotShowTooltip();
 
 private:
     void addEntry();
@@ -84,6 +88,9 @@ private:
     int m_itemDropEventIndex;
     QMimeData* m_itemDropEventMimeData;
     QDropEvent* m_itemDropEvent;
+    QTimer m_tooltipTimer;
+    int m_hoveredIndex;
+    QPoint m_hoverPos;
 };
 
 #endif // PLACESPANEL_H

[Kai Uwe Broulik]

use toLocalFile(), not path(). The latter causes incorrect formatting on Windows iirc.