tst_QWidget/XCB: Use bottom/right corner of screen as safe cursor position.

Pushing the mouse rapidly to the top left corner causes KDE / KWin to
switch to "Present all Windows" (Ctrl+F9) mode, showing all windows.
This has been observed to be triggered programmatically by
QCursor::setPos(0, 0) if there is no other window beneath and apparently
depending on the perceived mouse "speed".
Suppress this by using the bottom right corner for XCB.

Change-Id: Id18d2f45a095ed4d4f365f010cf45a20b0d9435e
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@qt.io>

1 files changed, 15 insertions, 7 deletions

diff --git a/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp b/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
index b9fe40e64c..55b6aff237 100644
--- a/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
+++ b/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
@@ -470,6 +470,7 @@ private:
     const QString m_platform;
     QSize m_testWidgetSize;
     QPoint m_availableTopLeft;
+    QPoint m_safeCursorPos;
     const bool m_windowsAnimationsEnabled;
 };
 
@@ -627,6 +628,7 @@ void tst_QWidget::getSetCheck()
 
 tst_QWidget::tst_QWidget()
     : m_platform(QGuiApplication::platformName().toLower())
+    , m_safeCursorPos(0, 0)
     , m_windowsAnimationsEnabled(windowsAnimationsEnabled())
 {
     if (m_windowsAnimationsEnabled) // Disable animations which can interfere with screen grabbing in moveChild(), showAndMoveChild()
@@ -669,7 +671,13 @@ void tst_QWidget::initTestCase()
     // to avoid Windows warnings about minimum size for decorated windows.
     int width = 200;
     const QScreen *screen = QGuiApplication::primaryScreen();
-    m_availableTopLeft = screen->availableGeometry().topLeft();
+    const QRect availableGeometry = screen->availableGeometry();
+    m_availableTopLeft = availableGeometry.topLeft();
+    // XCB: Determine "safe" cursor position at bottom/right corner of screen.
+    // Pushing the mouse rapidly to the top left corner can trigger KDE / KWin's
+    // "Present all Windows" (Ctrl+F9) feature also programmatically.
+    if (m_platform == QLatin1String("xcb"))
+        m_safeCursorPos = availableGeometry.bottomRight() - QPoint(40, 40);
     const int screenWidth = screen->geometry().width();
     if (screenWidth > 2000)
         width = 100 * ((screenWidth + 500) / 1000);
@@ -5669,7 +5677,7 @@ void tst_QWidget::setToolTip()
     // Mouse over doesn't work on Windows mobile, so skip the rest of the test for that platform.
 #ifndef Q_OS_WINCE_WM
     for (int pass = 0; pass < 2; ++pass) {
-        QCursor::setPos(0, 0);
+        QCursor::setPos(m_safeCursorPos);
         QScopedPointer<QWidget> popup(new QWidget(0, Qt::Popup));
         popup->setObjectName(QString::fromLatin1("tst_qwidget setToolTip #%1").arg(pass));
         popup->setWindowTitle(popup->objectName());
@@ -6020,7 +6028,7 @@ void tst_QWidget::childEvents()
 
     // Move away the cursor; otherwise it might result in an enter event if it's
     // inside the widget when the widget is shown.
-    QCursor::setPos(qApp->desktop()->availableGeometry().bottomRight());
+    QCursor::setPos(m_safeCursorPos);
     QTest::qWait(100);
 
     {
@@ -8883,7 +8891,7 @@ void tst_QWidget::syntheticEnterLeave()
         int numLeaveEvents;
     };
 
-    QCursor::setPos(QPoint(0,0));
+    QCursor::setPos(m_safeCursorPos);
 
     MyWidget window;
     window.setWindowFlags(Qt::WindowStaysOnTopHint);
@@ -9003,7 +9011,7 @@ void tst_QWidget::taskQTBUG_4055_sendSyntheticEnterLeave()
          int numEnterEvents, numMouseMoveEvents;
      };
 
-     QCursor::setPos(QPoint(0,0));
+     QCursor::setPos(m_safeCursorPos);
 
      SELParent parent;
      parent.move(200, 200);
@@ -10179,7 +10187,7 @@ void tst_QWidget::destroyedSignal()
 void tst_QWidget::underMouse()
 {
     // Move the mouse cursor to a safe location
-    QCursor::setPos(0,0);
+    QCursor::setPos(m_safeCursorPos);
 
     ColorWidget topLevelWidget(0, Qt::FramelessWindowHint, Qt::blue);
     ColorWidget childWidget1(&topLevelWidget, Qt::Widget, Qt::yellow);
@@ -10435,7 +10443,7 @@ public:
 void tst_QWidget::taskQTBUG_27643_enterEvents()
 {
     // Move the mouse cursor to a safe location so it won't interfere
-    QCursor::setPos(0,0);
+    QCursor::setPos(m_safeCursorPos);
 
     EnterTestMainDialog dialog;
     QPushButton button(&dialog);