summaryrefslogtreecommitdiffstats
path: root/tests
diff options
context:
space:
mode:
Diffstat (limited to 'tests')
-rw-r--r--tests/auto/qwidget/tst_qwidget.cpp108
1 files changed, 105 insertions, 3 deletions
diff --git a/tests/auto/qwidget/tst_qwidget.cpp b/tests/auto/qwidget/tst_qwidget.cpp
index b32bc4d..ee61871 100644
--- a/tests/auto/qwidget/tst_qwidget.cpp
+++ b/tests/auto/qwidget/tst_qwidget.cpp
@@ -285,6 +285,8 @@ private slots:
void render_systemClip();
void render_systemClip2_data();
void render_systemClip2();
+ void render_systemClip3_data();
+ void render_systemClip3();
void setContentsMargins();
@@ -6995,7 +6997,7 @@ void tst_QWidget::render_systemClip2()
// Render entire widget directly onto device.
widget.render(&image);
-#ifndef RENDER_DEBUG
+#ifdef RENDER_DEBUG
image.save("systemclip_with_device.png");
#endif
// All pixels within the system clip should now be
@@ -7011,17 +7013,17 @@ void tst_QWidget::render_systemClip2()
// Refill image with red.
image.fill(QColor(Qt::red).rgb());
+ paintEngine->setSystemClip(systemClip);
// Do the same with an untransformed painter.
QPainter painter(&image);
//Make sure we're using the same paint engine and has the right clip set.
- paintEngine->setSystemClip(systemClip);
QCOMPARE(painter.paintEngine(), paintEngine);
QCOMPARE(paintEngine->systemClip(), systemClip);
widget.render(&painter);
-#ifndef RENDER_DEBUG
+#ifdef RENDER_DEBUG
image.save("systemclip_with_untransformed_painter.png");
#endif
// All pixels within the system clip should now be
@@ -7036,6 +7038,106 @@ void tst_QWidget::render_systemClip2()
}
}
+void tst_QWidget::render_systemClip3_data()
+{
+ QTest::addColumn<QSize>("size");
+ QTest::addColumn<bool>("useSystemClip");
+
+ // Reference: http://en.wikipedia.org/wiki/Flag_of_Norway
+ QTest::newRow("Norwegian Civil Flag") << QSize(220, 160) << false;
+ QTest::newRow("Norwegian War Flag") << QSize(270, 160) << true;
+}
+
+// This test ensures that the current engine clip (systemClip + painter clip)
+// is preserved after QPainter::setClipRegion(..., Qt::ReplaceClip);
+void tst_QWidget::render_systemClip3()
+{
+ QFETCH(QSize, size);
+ QFETCH(bool, useSystemClip);
+
+ // Calculate the inner/outer cross of the flag.
+ QRegion outerCross(0, 0, size.width(), size.height());
+ outerCross -= QRect(0, 0, 60, 60);
+ outerCross -= QRect(100, 0, size.width() - 100, 60);
+ outerCross -= QRect(0, 100, 60, 60);
+ outerCross -= QRect(100, 100, size.width() - 100, 60);
+
+ QRegion innerCross(0, 0, size.width(), size.height());
+ innerCross -= QRect(0, 0, 70, 70);
+ innerCross -= QRect(90, 0, size.width() - 90, 70);
+ innerCross -= QRect(0, 90, 70, 70);
+ innerCross -= QRect(90, 90, size.width() - 90, 70);
+
+ const QRegion redArea(QRegion(0, 0, size.width(), size.height()) - outerCross);
+ const QRegion whiteArea(outerCross - innerCross);
+ const QRegion blueArea(innerCross);
+ QRegion systemClip;
+
+ // Okay, here's the image that should look like a Norwegian civil/war flag in the end.
+ QImage flag(size, QImage::Format_ARGB32);
+ flag.fill(QColor(Qt::transparent).rgba());
+
+ if (useSystemClip) {
+ QPainterPath warClip(QPoint(size.width(), 0));
+ warClip.lineTo(size.width() - 110, 60);
+ warClip.lineTo(size.width(), 80);
+ warClip.lineTo(size.width() - 110, 100);
+ warClip.lineTo(size.width(), 160);
+ warClip.closeSubpath();
+ systemClip = QRegion(0, 0, size.width(), size.height()) - QRegion(warClip.toFillPolygon().toPolygon());
+ flag.paintEngine()->setSystemClip(systemClip);
+ }
+
+ QPainter painter(&flag);
+ painter.fillRect(QRect(QPoint(), size), Qt::red); // Fill image background with red.
+ painter.setClipRegion(outerCross); // Limit widget painting to inside the outer cross.
+
+ // Here's the widget that's supposed to draw the inner/outer cross of the flag.
+ // The outer cross (white) should be drawn when the background is auto-filled, and
+ // the inner cross (blue) should be drawn in the paintEvent.
+ class MyWidget : public QWidget
+ { public:
+ void paintEvent(QPaintEvent *)
+ {
+ QPainter painter(this);
+ // Be evil and try to paint outside the outer cross. This should not be
+ // possible since the shared painter is clipped to the outer cross.
+ painter.setClipRect(0, 0, 60, 60, Qt::ReplaceClip);
+ painter.fillRect(rect(), Qt::green);
+ painter.setClipRegion(clip, Qt::ReplaceClip);
+ painter.fillRect(rect(), Qt::blue);
+ }
+ QRegion clip;
+ };
+
+ MyWidget widget;
+ widget.clip = innerCross;
+ widget.setFixedSize(size);
+ widget.setPalette(Qt::white);
+ widget.setAutoFillBackground(true);
+ widget.render(&painter);
+
+#ifdef RENDER_DEBUG
+ flag.save("flag.png");
+#endif
+
+ // Let's make sure we got a Norwegian flag.
+ for (int i = 0; i < flag.height(); ++i) {
+ for (int j = 0; j < flag.width(); ++j) {
+ const QPoint pixel(j, i);
+ const QRgb pixelValue = flag.pixel(pixel);
+ if (useSystemClip && !systemClip.contains(pixel))
+ QCOMPARE(pixelValue, QColor(Qt::transparent).rgba());
+ else if (redArea.contains(pixel))
+ QCOMPARE(pixelValue, QColor(Qt::red).rgba());
+ else if (whiteArea.contains(pixel))
+ QCOMPARE(pixelValue, QColor(Qt::white).rgba());
+ else
+ QCOMPARE(pixelValue, QColor(Qt::blue).rgba());
+ }
+ }
+}
+
void tst_QWidget::setContentsMargins()
{
QLabel label("why does it always rain on me?");