whytofly
/
qt6-bb10
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

High-DPI: Test application startup with no screens 

Initialize the offscreen platform plugin with no screens,
create QGuiApplication object.

Not much of the high-dpi related Qt API can be used
in this configuration, but at least Qt should not crash
on startup.

Task-number: QTBUG-71034
Change-Id: I6620843c3bd8b692c5c2419b1ba290e16175ba5b
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
bb10
Morten Johan Sørvig 2020-12-23 11:53:14 +01:00
parent df912d08c3
commit 3a1773dd76
1 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
tests/auto/gui/kernel/qhighdpi/tst_qhighdpi.cpp
View File

@ -43,11 +43,13 @@ private: // helpers
QJsonArray createStandardScreens(const QList<qreal> &dpiValues);
QGuiApplication *createOffscreenApplication(const QByteArray &jsonConfig);
QGuiApplication *createStandardOffscreenApp(const QList<qreal> &dpiValues);
QGuiApplication *createStandardOffscreenApp(const QJsonArray &screens);
static void standardScreenDpiTestData();
private slots:
void initTestCase();
void qhighdpiscaling_data();
void qhighdpiscaling();
void noscreens();
void screenDpiAndDpr_data();
void screenDpiAndDpr();
void screenAt_data();
@ -142,6 +144,11 @@ QGuiApplication *tst_QHighDpi::createOffscreenApplication(const QByteArray &json
QGuiApplication *tst_QHighDpi::createStandardOffscreenApp(const QList<qreal> &dpiValues)
{
QJsonArray screens = createStandardScreens(dpiValues);
return createStandardOffscreenApp(screens);
}
QGuiApplication *tst_QHighDpi::createStandardOffscreenApp(const QJsonArray &screens)
{
QJsonObject config {
{"synchronousWindowSystemEvents", true},
{"windowFrameMargins", false},
@ -216,6 +223,15 @@ void tst_QHighDpi::screenDpiAndDpr()
}
}
void tst_QHighDpi::noscreens()
{
// Create application object with a no-screens configuration (should not crash)
QJsonArray noScreens;
std::unique_ptr<QGuiApplication> app(createStandardOffscreenApp(noScreens));
QCOMPARE(qApp->devicePixelRatio(), 1);
}
void tst_QHighDpi::screenAt_data()
{
standardScreenDpiTestData();