Set the _NET_WM_WINDOW_TYPE property in the XCB backend.

2 files changed, 39 insertions, 0 deletions

diff --git a/src/plugins/platforms/xcb/qxcbwindow.cpp b/src/plugins/platforms/xcb/qxcbwindow.cpp
index f0b9e32..ad91602 100644
--- a/src/plugins/platforms/xcb/qxcbwindow.cpp
+++ b/src/plugins/platforms/xcb/qxcbwindow.cpp
@@ -304,6 +304,8 @@ Qt::WindowFlags QXcbWindow::setWindowFlags(Qt::WindowFlags flags)
 {
     Qt::WindowType type = static_cast<Qt::WindowType>(int(flags & Qt::WindowType_Mask));
 
+    setNetWmWindowTypes(flags);
+
     if (type == Qt::ToolTip)
         flags |= Qt::WindowStaysOnTopHint | Qt::FramelessWindowHint | Qt::X11BypassWindowManagerHint;
     if (type == Qt::Popup)
@@ -407,6 +409,42 @@ Qt::WindowFlags QXcbWindow::setWindowFlags(Qt::WindowFlags flags)
     return QPlatformWindow::setWindowFlags(flags);
 }
 
+void QXcbWindow::setNetWmWindowTypes(Qt::WindowFlags flags)
+{
+    // in order of decreasing priority
+    QVector<uint> windowTypes;
+
+    Qt::WindowType type = static_cast<Qt::WindowType>(int(flags & Qt::WindowType_Mask));
+
+    switch (type) {
+    case Qt::Dialog:
+    case Qt::Sheet:
+        windowTypes.append(atom(QXcbAtom::_NET_WM_WINDOW_TYPE_DIALOG));
+        break;
+    case Qt::Tool:
+    case Qt::Drawer:
+        windowTypes.append(atom(QXcbAtom::_NET_WM_WINDOW_TYPE_UTILITY));
+        break;
+    case Qt::ToolTip:
+        windowTypes.append(atom(QXcbAtom::_NET_WM_WINDOW_TYPE_TOOLTIP));
+        break;
+    case Qt::SplashScreen:
+        windowTypes.append(atom(QXcbAtom::_NET_WM_WINDOW_TYPE_SPLASH));
+        break;
+    default:
+        break;
+    }
+
+    if (flags & Qt::FramelessWindowHint)
+        windowTypes.append(atom(QXcbAtom::_KDE_NET_WM_WINDOW_TYPE_OVERRIDE));
+
+    windowTypes.append(atom(QXcbAtom::_NET_WM_WINDOW_TYPE_NORMAL));
+
+    Q_XCB_CALL(xcb_change_property(xcb_connection(), XCB_PROP_MODE_REPLACE, m_window,
+                                   atom(QXcbAtom::_NET_WM_WINDOW_TYPE), XCB_ATOM_ATOM, 32,
+                                   windowTypes.count(), windowTypes.constData()));
+}
+
 WId QXcbWindow::winId() const
 {
     return m_window;
diff --git a/src/plugins/platforms/xcb/qxcbwindow.h b/src/plugins/platforms/xcb/qxcbwindow.h
index 0fa4d0f..e049837 100644
--- a/src/plugins/platforms/xcb/qxcbwindow.h
+++ b/src/plugins/platforms/xcb/qxcbwindow.h
@@ -92,6 +92,7 @@ public:
     void updateSyncRequestCounter();
 
 private:
+    void setNetWmWindowTypes(Qt::WindowFlags flags);
 
     QXcbScreen *m_screen;