Fix shift-action modifier in context menu

Before this patch, the shift-action modifier in context menus did not
work when a sub-context menu is open, that does not have the main
context menu as its parent.
The new fix installs an event filter on QApplication whenever a new
context menu is opened to make the context menu aware of shift-presses
even when a sub-context menu is in focus.

BUG: 425997
FIXED-IN: 21.04

2 files changed, 9 insertions, 15 deletions

diff --git a/src/dolphincontextmenu.cpp b/src/dolphincontextmenu.cpp
index eb3f641e5..2b216ce03 100644
--- a/src/dolphincontextmenu.cpp
+++ b/src/dolphincontextmenu.cpp
@@ -63,7 +63,7 @@ DolphinContextMenu::DolphinContextMenu(DolphinMainWindow* parent,
     const DolphinView* view = m_mainWindow->activeViewContainer()->view();
     m_selectedItems = view->selectedItems();
 
-    installEventFilter(this);
+    QApplication::instance()->installEventFilter(this);
 }
 
 DolphinContextMenu::~DolphinContextMenu()
@@ -112,28 +112,23 @@ DolphinContextMenu::Command DolphinContextMenu::open()
     return m_command;
 }
 
-void DolphinContextMenu::childEvent(QChildEvent* event)
+bool DolphinContextMenu::eventFilter(QObject* object, QEvent* event)
 {
-    if(event->added()) {
-        event->child()->installEventFilter(this);
-    }
-    QMenu::childEvent(event);
-}
+    Q_UNUSED(object)
 
-bool DolphinContextMenu::eventFilter(QObject* dest, QEvent* event)
-{
     if(event->type() == QEvent::KeyPress || event->type() == QEvent::KeyRelease) {
         QKeyEvent* keyEvent = static_cast<QKeyEvent*>(event);
-        if(m_removeAction && keyEvent->key() == Qt::Key_Shift) {
-            if(event->type() == QEvent::KeyPress) {
+
+        if (m_removeAction && keyEvent->key() == Qt::Key_Shift) {
+            if (event->type() == QEvent::KeyPress) {
                 m_removeAction->update(DolphinRemoveAction::ShiftState::Pressed);
             } else {
                 m_removeAction->update(DolphinRemoveAction::ShiftState::Released);
             }
-            return true;
         }
     }
-    return QMenu::eventFilter(dest, event);
+
+    return false;
 }
 
 void DolphinContextMenu::openTrashContextMenu()
diff --git a/src/dolphincontextmenu.h b/src/dolphincontextmenu.h
index 7f0b6988a..afd8b8c4d 100644
--- a/src/dolphincontextmenu.h
+++ b/src/dolphincontextmenu.h
@@ -74,8 +74,7 @@ public:
     Command open();
 
 protected:
-    void childEvent(QChildEvent* event) override;
-    bool eventFilter(QObject* dest, QEvent* event) override;
+    bool eventFilter(QObject* object, QEvent* event) override;
 
 private:
     void openTrashContextMenu();