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Bug
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Resolution: Unresolved
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P3: Somewhat important
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None
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5.12.3
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None
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macOS 10.14.5
MacBook Pro
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macOS
In the (simplified) application below, the cursor should be blank when the window is active, which means you should never see an arrow cursor. However, alt-tabbing back and forth shows that the cursor shape is sometimes set to Qt::ArrowShape.
It's easiest to reproduce the issue when alt-tabbing through the complete list of open applications and back to the Qt application.
main.cpp
#include <QGuiApplication> #include <QQmlApplicationEngine> #include <QQuickItem> #include <QQuickWindow> class CustomItem : public QQuickItem { Q_OBJECT public: CustomItem() : mContainsMouse(false) { setAcceptedMouseButtons(Qt::AllButtons); setAcceptHoverEvents(true); setFocus(true); } void updateWindowCursorShape() { window()->setCursor(QCursor(mContainsMouse ? Qt::BlankCursor : Qt::ArrowCursor)); } bool containsMouse() const { return mContainsMouse; } void setContainsMouse(bool containsMouse) { qDebug() << "setContainsMouse:" << containsMouse; if (containsMouse == mContainsMouse) return; mContainsMouse = containsMouse; updateWindowCursorShape(); } void mousePressEvent(QMouseEvent *event) override { qDebug() << "mousePressEvent:" << event; QQuickItem::mousePressEvent(event); setContainsMouse(true); } void mouseMoveEvent(QMouseEvent *event) override { qDebug() << "mouseMoveEvent:" << event; QQuickItem::mouseMoveEvent(event); setContainsMouse(true); } void hoverEnterEvent(QHoverEvent *event) override { qDebug() << "hoverEnterEvent:" << event; QQuickItem::hoverEnterEvent(event); setContainsMouse(true); } void hoverMoveEvent(QHoverEvent *event) override { qDebug() << "hoverMoveEvent:" << event->posF(); QQuickItem::hoverMoveEvent(event); setContainsMouse(true); } void hoverLeaveEvent(QHoverEvent *event) override { qDebug() << "hoverLeaveEvent:" << event; QQuickItem::hoverLeaveEvent(event); setContainsMouse(false); } void focusInEvent(QFocusEvent *event) override { qDebug() << "focusInEvent:" << event; QQuickItem::focusInEvent(event); setContainsMouse(true); } void focusOutEvent(QFocusEvent *event) override { qDebug() << "focusOutEvent:" << event; QQuickItem::focusOutEvent(event); setContainsMouse(false); } private: bool mContainsMouse; }; int main(int argc, char *argv[]) { QGuiApplication app(argc, argv); qmlRegisterType<CustomItem>("App", 1, 0, "CustomItem"); QQmlApplicationEngine engine; engine.load(QUrl(QStringLiteral("qrc:/main.qml"))); return app.exec(); } #include "main.moc"
main.qml
import QtQuick 2.0 import QtQuick.Window 2.0 import App 1.0 Window { id: root width: 640 height: 480 visible: true CustomItem { anchors.fill: parent } }
When setting QT_MESSAGE_PATTERN to
%{time mm:ss:zzz} %{message}
I see the following output when alt-tabbing back into the application:
42:31:427 hoverLeaveEvent: QHoverEvent(HoverLeave, 0x7ffee3450d30) 42:31:427 setContainsMouse: false
This could suggest that HoverLeave is being sent instead of HoverEnter when the window becomes active.