core/popupwindow: add grabFocus

Allows standard wayland focus grabs on non hyprland compositors.

changelog/next.md

@@ -21,6 +21,7 @@ set shell id.
 - Pipewire service now reconnects if pipewire dies or a protocol error occurs.
 - Added pipewire audio peak detection.
 - Added initial support for network management.
+- Added support for grabbing focus from popup windows.
 
 ## Other Changes
 

src/window/popupwindow.cpp

@@ -59,7 +59,7 @@ void ProxyPopupWindow::completeWindow() {
 	}
 
 	this->window->setTransientParent(bw);
-	this->window->setFlag(Qt::ToolTip);
+	this->window->setFlag(this->bWantsGrab ? Qt::Popup : Qt::ToolTip);
 
 	this->mAnchor.markDirty();
 	PopupPositioner::instance()->reposition(&this->mAnchor, this->window);

src/window/popupwindow.hpp

@@ -76,6 +76,15 @@ class ProxyPopupWindow: public ProxyWindowBase {
 	///
 	/// The popup will not be shown until @@anchor is valid, regardless of this property.
 	QSDOC_PROPERTY_OVERRIDE(bool visible READ isVisible WRITE setVisible NOTIFY visibleChanged);
+	/// If true, the popup window will be dismissed and @@visible will change to false
+	/// if the user clicks outside of the popup or it is otherwise closed.
+	///
+	/// > [!WARNING] Changes to this property while the window is open will only take
+	/// > effect after the window is hidden and shown again.
+	///
+	/// > [!NOTE] Under Hyprland, @@Quickshell.Hyprland.HyprlandFocusGrab provides more advanced
+	/// > functionality such as detecting clicks outside without closing the popup.
+	Q_PROPERTY(bool grabFocus READ default WRITE default NOTIFY grabFocusChanged BINDABLE bindableGrabFocus);
 	/// The screen that the window currently occupies.
 	///
 	/// This may be modified to move the window to the given screen.
@@ -103,12 +112,15 @@ public:
 	[[nodiscard]] qint32 relativeY() const;
 	void setRelativeY(qint32 y);
 
+	[[nodiscard]] QBindable<bool> bindableGrabFocus() { return &this->bWantsGrab; }
+
 	[[nodiscard]] PopupAnchor* anchor();
 
 signals:
 	void parentWindowChanged();
 	void relativeXChanged();
 	void relativeYChanged();
+	void grabFocusChanged();
 
 private slots:
 	void onParentWindowChanged();
@@ -131,4 +143,6 @@ private:
 	    bTargetVisible,
 	    &ProxyPopupWindow::targetVisibleChanged
 	);
+
+	Q_OBJECT_BINDABLE_PROPERTY(ProxyPopupWindow, bool, bWantsGrab);
 };