qt5base-lts/tests/auto/widgets/effects/qgraphicseffect/tst_qgraphicseffect.cpp

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#include <QtTest/QtTestWidgets>
2011-05-23 14:49:06 +00:00
#include <QtWidgets/qdesktopwidget.h>
#include <QtWidgets/qgraphicseffect.h>
#include <QtWidgets/qgraphicsview.h>
#include <QtWidgets/qgraphicsscene.h>
#include <QtWidgets/qgraphicsitem.h>
#include <QtWidgets/qgraphicswidget.h>
#include <QtWidgets/qstyleoption.h>
#include <private/qgraphicseffect_p.h>
class tst_QGraphicsEffect : public QObject
{
Q_OBJECT
public slots:
void initTestCase();
private slots:
void setEnabled();
void source();
void boundingRectFor();
void boundingRect();
void boundingRect2();
void draw();
void opacity();
void grayscale();
void colorize();
void drawPixmapItem();
void deviceCoordinateTranslateCaching();
void inheritOpacity();
void dropShadowClipping();
void childrenVisibilityShouldInvalidateCache();
void prepareGeometryChangeInvalidateCache();
void itemHasNoContents();
};
void tst_QGraphicsEffect::initTestCase()
{}
class CustomItem : public QGraphicsRectItem
{
public:
CustomItem(qreal x, qreal y, qreal width, qreal height, QGraphicsItem *parent = 0)
: QGraphicsRectItem(x, y, width, height, parent), numRepaints(0),
m_painter(0), m_styleOption(0)
{}
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
m_painter = painter;
m_styleOption = option;
++numRepaints;
QGraphicsRectItem::paint(painter, option, widget);
}
void reset()
{
numRepaints = 0;
m_painter = 0;
m_styleOption = 0;
}
int numRepaints;
QPainter *m_painter;
const QStyleOption *m_styleOption;
};
class CustomEffect : public QGraphicsEffect
{
public:
CustomEffect()
: QGraphicsEffect(), numRepaints(0), m_margin(10),
doNothingInDraw(false), m_painter(0), m_styleOption(0), m_source(0), m_opacity(1.0)
{}
QRectF boundingRectFor(const QRectF &rect) const
{ return rect.adjusted(-m_margin, -m_margin, m_margin, m_margin); }
void reset()
{
numRepaints = 0;
m_sourceChangedFlags = QGraphicsEffect::ChangeFlags();
m_painter = 0;
m_styleOption = 0;
m_source = 0;
m_opacity = 1.0;
}
void setMargin(int margin)
{
m_margin = margin;
updateBoundingRect();
}
int margin() const
{ return m_margin; }
void draw(QPainter *painter)
{
++numRepaints;
if (doNothingInDraw)
return;
m_source = source();
m_painter = painter;
m_styleOption = source()->styleOption();
m_opacity = painter->opacity();
drawSource(painter);
}
void sourceChanged(QGraphicsEffect::ChangeFlags flags)
{ m_sourceChangedFlags |= flags; }
int numRepaints;
int m_margin;
QGraphicsEffect::ChangeFlags m_sourceChangedFlags;
bool doNothingInDraw;
QPainter *m_painter;
const QStyleOption *m_styleOption;
QGraphicsEffectSource *m_source;
qreal m_opacity;
};
void tst_QGraphicsEffect::setEnabled()
{
CustomEffect effect;
QVERIFY(effect.isEnabled());
effect.setEnabled(false);
QVERIFY(!effect.isEnabled());
}
void tst_QGraphicsEffect::source()
{
QPointer<CustomEffect> effect = new CustomEffect;
QVERIFY(!effect->source());
QVERIFY(!effect->m_sourceChangedFlags);
// Install effect on QGraphicsItem.
QGraphicsItem *item = new QGraphicsRectItem(0, 0, 10, 10);
item->setGraphicsEffect(effect);
QVERIFY(effect->source());
QCOMPARE(effect->source()->graphicsItem(), (const QGraphicsItem*)item);
QVERIFY(effect->m_sourceChangedFlags & QGraphicsEffect::SourceAttached);
effect->reset();
// Make sure disabling/enabling the effect doesn't change the source.
effect->setEnabled(false);
QVERIFY(effect->source());
QCOMPARE(effect->source()->graphicsItem(), (const QGraphicsItem*)item);
QVERIFY(!effect->m_sourceChangedFlags);
effect->reset();
effect->setEnabled(true);
QVERIFY(effect->source());
QCOMPARE(effect->source()->graphicsItem(), (const QGraphicsItem*)item);
QVERIFY(!effect->m_sourceChangedFlags);
effect->reset();
// Uninstall effect on QGraphicsItem.
effect->reset();
item->setGraphicsEffect(0);
QVERIFY(!effect);
effect = new CustomEffect;
// The item takes ownership and should delete the effect when destroyed.
item->setGraphicsEffect(effect);
QPointer<QGraphicsEffectSource> source = effect->source();
QVERIFY(source);
QCOMPARE(source->graphicsItem(), (const QGraphicsItem*)item);
delete item;
QVERIFY(!effect);
QVERIFY(!source);
}
void tst_QGraphicsEffect::boundingRectFor()
{
CustomEffect effect;
int margin = effect.margin();
const QRectF source(0, 0, 100, 100);
QCOMPARE(effect.boundingRectFor(source), source.adjusted(-margin, -margin, margin, margin));
effect.setMargin(margin = 20);
QCOMPARE(effect.boundingRectFor(source), source.adjusted(-margin, -margin, margin, margin));
}
void tst_QGraphicsEffect::boundingRect()
{
// No source; empty bounding rect.
CustomEffect *effect = new CustomEffect;
QCOMPARE(effect->boundingRect(), QRectF());
// Install effect on QGraphicsItem.
QRectF itemRect(0, 0, 100, 100);
QGraphicsRectItem *item = new QGraphicsRectItem;
item->setPen(QPen(Qt::black, 0));
item->setRect(itemRect);
item->setGraphicsEffect(effect);
int margin = effect->margin();
QCOMPARE(effect->boundingRect(), itemRect.adjusted(-margin, -margin, margin, margin));
QCOMPARE(effect->boundingRect(), effect->boundingRectFor(itemRect));
// Make sure disabling/enabling the effect doesn't change the bounding rect.
effect->setEnabled(false);
QCOMPARE(effect->boundingRect(), itemRect.adjusted(-margin, -margin, margin, margin));
QCOMPARE(effect->boundingRect(), effect->boundingRectFor(itemRect));
effect->setEnabled(true);
QCOMPARE(effect->boundingRect(), itemRect.adjusted(-margin, -margin, margin, margin));
QCOMPARE(effect->boundingRect(), effect->boundingRectFor(itemRect));
// Change effect margins.
effect->setMargin(margin = 20);
QCOMPARE(effect->boundingRect(), itemRect.adjusted(-margin, -margin, margin, margin));
QCOMPARE(effect->boundingRect(), effect->boundingRectFor(itemRect));
// Uninstall effect on QGraphicsItem.
QPointer<CustomEffect> ptr = effect;
item->setGraphicsEffect(0);
QVERIFY(!ptr);
delete item;
}
void tst_QGraphicsEffect::boundingRect2()
{
CustomEffect *effect = new CustomEffect;
QGraphicsRectItem *root = new QGraphicsRectItem;
root->setPen(QPen(Qt::black, 0));
root->setGraphicsEffect(effect);
QGraphicsRectItem *child = new QGraphicsRectItem;
QRectF childRect(0, 0, 100, 100);
child->setPen(QPen(Qt::black, 0));
child->setFlag(QGraphicsItem::ItemClipsChildrenToShape);
child->setRect(childRect);
child->setParentItem(root);
QGraphicsRectItem *grandChild = new QGraphicsRectItem;
QRectF grandChildRect(0, 0, 200, 200);
grandChild->setPen(QPen(Qt::black, 0));
grandChild->setRect(grandChildRect);
grandChild->setParentItem(child);
// Make sure the effect's bounding rect is clipped to the child's bounding rect.
QCOMPARE(effect->boundingRect(), effect->boundingRectFor(childRect));
// Disable ItemClipsChildrenToShape; effect's bounding rect is no longer clipped.
child->setFlag(QGraphicsItem::ItemClipsChildrenToShape, false);
QCOMPARE(effect->boundingRect(), effect->boundingRectFor(childRect | grandChildRect));
// Add root item to a scene, do the same tests as above. Results should be the same.
QGraphicsScene scene;
scene.addItem(root);
child->setFlag(QGraphicsItem::ItemClipsChildrenToShape);
QCOMPARE(effect->boundingRect(), effect->boundingRectFor(childRect));
child->setFlag(QGraphicsItem::ItemClipsChildrenToShape, false);
QCOMPARE(effect->boundingRect(), effect->boundingRectFor(childRect | grandChildRect));
// Now add the scene to a view, results should be the same.
QGraphicsView view(&scene);
child->setFlag(QGraphicsItem::ItemClipsChildrenToShape);
QCOMPARE(effect->boundingRect(), effect->boundingRectFor(childRect));
child->setFlag(QGraphicsItem::ItemClipsChildrenToShape, false);
QCOMPARE(effect->boundingRect(), effect->boundingRectFor(childRect | grandChildRect));
CustomEffect *childEffect = new CustomEffect;
child->setGraphicsEffect(childEffect);
QCOMPARE(effect->boundingRect(), effect->boundingRectFor(childEffect->boundingRectFor(childRect | grandChildRect)));
child->setGraphicsEffect(0);
QCOMPARE(effect->boundingRect(), effect->boundingRectFor(childRect | grandChildRect));
}
void tst_QGraphicsEffect::draw()
{
QGraphicsScene scene;
CustomItem *item = new CustomItem(0, 0, 100, 100);
scene.addItem(item);
QGraphicsView view(&scene);
view.show();
QVERIFY(QTest::qWaitForWindowActive(&view));
QTRY_VERIFY(item->numRepaints > 0);
item->reset();
// Make sure installing the effect triggers a repaint.
CustomEffect *effect = new CustomEffect;
item->setGraphicsEffect(effect);
QTRY_COMPARE(effect->numRepaints, 1);
QTRY_COMPARE(item->numRepaints, 1);
// Make sure QPainter* and QStyleOptionGraphicsItem* stays persistent
// during QGraphicsEffect::draw/QGraphicsItem::paint.
QVERIFY(effect->m_painter);
QCOMPARE(effect->m_painter, item->m_painter);
QCOMPARE(effect->m_styleOption, item->m_styleOption);
// Make sure QGraphicsEffect::source is persistent.
QCOMPARE(effect->m_source, effect->source());
effect->reset();
item->reset();
// Make sure updating the source triggers a repaint.
item->update();
QTRY_COMPARE(effect->numRepaints, 1);
QTRY_COMPARE(item->numRepaints, 1);
QVERIFY(effect->m_sourceChangedFlags & QGraphicsEffect::SourceInvalidated);
effect->reset();
item->reset();
// Make sure changing the effect's bounding rect triggers a repaint.
effect->setMargin(20);
QTRY_COMPARE(effect->numRepaints, 1);
QTRY_COMPARE(item->numRepaints, 1);
effect->reset();
item->reset();
// Make sure change the item's bounding rect triggers a repaint.
item->setRect(0, 0, 50, 50);
QTRY_COMPARE(effect->numRepaints, 1);
QTRY_COMPARE(item->numRepaints, 1);
QVERIFY(effect->m_sourceChangedFlags & QGraphicsEffect::SourceBoundingRectChanged);
effect->reset();
item->reset();
// Make sure the effect is the one to issue a repaint of the item.
effect->doNothingInDraw = true;
item->update();
QTRY_COMPARE(effect->numRepaints, 1);
QCOMPARE(item->numRepaints, 0);
effect->doNothingInDraw = false;
effect->reset();
item->reset();
// Make sure we update the source when disabling/enabling the effect.
effect->setEnabled(false);
QTest::qWait(50);
QCOMPARE(effect->numRepaints, 0);
QCOMPARE(item->numRepaints, 1);
effect->reset();
item->reset();
effect->setEnabled(true);
QTRY_COMPARE(effect->numRepaints, 1);
QTRY_COMPARE(item->numRepaints, 1);
effect->reset();
item->reset();
// Effect is already enabled; nothing should happen.
effect->setEnabled(true);
QTest::qWait(50);
QCOMPARE(effect->numRepaints, 0);
QCOMPARE(item->numRepaints, 0);
// Make sure uninstalling an effect triggers a repaint.
QPointer<CustomEffect> ptr = effect;
item->setGraphicsEffect(0);
QVERIFY(!ptr);
QTRY_COMPARE(item->numRepaints, 1);
}
void tst_QGraphicsEffect::opacity()
{
// Make sure the painter's opacity is correct in QGraphicsEffect::draw.
QGraphicsScene scene;
CustomItem *item = new CustomItem(0, 0, 100, 100);
item->setOpacity(0.5);
CustomEffect *effect = new CustomEffect;
item->setGraphicsEffect(effect);
scene.addItem(item);
QGraphicsView view(&scene);
view.show();
QVERIFY(QTest::qWaitForWindowExposed(&view));
QTRY_VERIFY(effect->numRepaints > 0);
QCOMPARE(effect->m_opacity, qreal(0.5));
}
void tst_QGraphicsEffect::grayscale()
{
if (qApp->desktop()->depth() < 24)
QSKIP("Test only works on 32 bit displays");
QGraphicsScene scene(0, 0, 100, 100);
QGraphicsRectItem *item = scene.addRect(0, 0, 50, 50);
item->setPen(Qt::NoPen);
item->setBrush(QColor(122, 193, 66)); // Qt light green
QGraphicsColorizeEffect *effect = new QGraphicsColorizeEffect;
effect->setColor(Qt::black);
item->setGraphicsEffect(effect);
QPainter painter;
QImage image(100, 100, QImage::Format_ARGB32_Premultiplied);
image.fill(0);
painter.begin(&image);
painter.setRenderHint(QPainter::Antialiasing);
scene.render(&painter);
painter.end();
QCOMPARE(image.pixel(10, 10), qRgb(148, 148, 148));
effect->setStrength(0.5);
image.fill(0);
painter.begin(&image);
painter.setRenderHint(QPainter::Antialiasing);
scene.render(&painter);
painter.end();
QCOMPARE(image.pixel(10, 10), qRgb(135, 171, 107));
effect->setStrength(0.0);
image.fill(0);
painter.begin(&image);
painter.setRenderHint(QPainter::Antialiasing);
scene.render(&painter);
painter.end();
QCOMPARE(image.pixel(10, 10), qRgb(122, 193, 66));
}
void tst_QGraphicsEffect::colorize()
{
if (qApp->desktop()->depth() < 24)
QSKIP("Test only works on 32 bit displays");
QGraphicsScene scene(0, 0, 100, 100);
QGraphicsRectItem *item = scene.addRect(0, 0, 50, 50);
item->setPen(Qt::NoPen);
item->setBrush(QColor(122, 193, 66)); // Qt light green
QGraphicsColorizeEffect *effect = new QGraphicsColorizeEffect;
effect->setColor(QColor(102, 153, 51)); // Qt dark green
item->setGraphicsEffect(effect);
QPainter painter;
QImage image(100, 100, QImage::Format_ARGB32_Premultiplied);
image.fill(0);
painter.begin(&image);
painter.setRenderHint(QPainter::Antialiasing);
scene.render(&painter);
painter.end();
QCOMPARE(image.pixel(10, 10), qRgb(191, 212, 169));
effect->setStrength(0.5);
image.fill(0);
painter.begin(&image);
painter.setRenderHint(QPainter::Antialiasing);
scene.render(&painter);
painter.end();
QCOMPARE(image.pixel(10, 10), qRgb(156, 203, 117));
effect->setStrength(0.0);
image.fill(0);
painter.begin(&image);
painter.setRenderHint(QPainter::Antialiasing);
scene.render(&painter);
painter.end();
QCOMPARE(image.pixel(10, 10), qRgb(122, 193, 66));
}
class PixmapItemEffect : public QGraphicsEffect
{
public:
PixmapItemEffect(const QPixmap &source)
: QGraphicsEffect()
, pixmap(source)
, repaints(0)
{}
QRectF boundingRectFor(const QRectF &rect) const
{ return rect; }
void draw(QPainter *painter)
{
QVERIFY(sourcePixmap(Qt::LogicalCoordinates).handle() == pixmap.handle());
QVERIFY((painter->worldTransform().type() <= QTransform::TxTranslate) == (sourcePixmap(Qt::DeviceCoordinates).handle() == pixmap.handle()));
++repaints;
}
QPixmap pixmap;
int repaints;
};
void tst_QGraphicsEffect::drawPixmapItem()
{
QImage image(32, 32, QImage::Format_RGB32);
QPainter p(&image);
p.fillRect(0, 0, 32, 16, Qt::blue);
p.fillRect(0, 16, 32, 16, Qt::red);
p.end();
QGraphicsScene scene;
QGraphicsPixmapItem *item = new QGraphicsPixmapItem(QPixmap::fromImage(image));
scene.addItem(item);
PixmapItemEffect *effect = new PixmapItemEffect(item->pixmap());
item->setGraphicsEffect(effect);
QGraphicsView view(&scene);
view.show();
QVERIFY(QTest::qWaitForWindowExposed(&view));
QTRY_VERIFY(effect->repaints >= 1);
item->rotate(180);
QTRY_VERIFY(effect->repaints >= 2);
}
class DeviceEffect : public QGraphicsEffect
{
public:
QRectF boundingRectFor(const QRectF &rect) const
{ return rect; }
void draw(QPainter *painter)
{
QPoint offset;
QPixmap pixmap = sourcePixmap(Qt::DeviceCoordinates, &offset, QGraphicsEffect::NoPad);
if (pixmap.isNull())
return;
painter->save();
painter->setWorldTransform(QTransform());
painter->drawPixmap(offset, pixmap);
painter->restore();
}
};
void tst_QGraphicsEffect::deviceCoordinateTranslateCaching()
{
QGraphicsScene scene;
CustomItem *item = new CustomItem(0, 0, 10, 10);
scene.addItem(item);
scene.setSceneRect(0, 0, 50, 0);
item->setGraphicsEffect(new DeviceEffect);
item->setPen(Qt::NoPen);
item->setBrush(Qt::red);
QGraphicsView view(&scene);
view.show();
QVERIFY(QTest::qWaitForWindowExposed(&view));
QTRY_VERIFY(item->numRepaints >= 1);
int numRepaints = item->numRepaints;
item->translate(10, 0);
QTRY_VERIFY(item->numRepaints == numRepaints);
}
void tst_QGraphicsEffect::inheritOpacity()
{
QGraphicsScene scene;
QGraphicsRectItem *rectItem = new QGraphicsRectItem(0, 0, 10, 10);
CustomItem *item = new CustomItem(0, 0, 10, 10, rectItem);
scene.addItem(rectItem);
item->setGraphicsEffect(new DeviceEffect);
item->setPen(Qt::NoPen);
item->setBrush(Qt::red);
rectItem->setOpacity(0.5);
QGraphicsView view(&scene);
view.show();
QVERIFY(QTest::qWaitForWindowExposed(&view));
QTRY_VERIFY(item->numRepaints >= 1);
int numRepaints = item->numRepaints;
rectItem->setOpacity(1);
// item should have been rerendered due to opacity changing
QTRY_VERIFY(item->numRepaints > numRepaints);
}
void tst_QGraphicsEffect::dropShadowClipping()
{
QImage img(128, 128, QImage::Format_ARGB32_Premultiplied);
img.fill(0xffffffff);
QGraphicsScene scene;
QGraphicsRectItem *item = new QGraphicsRectItem(-5, -500, 10, 1000);
item->setGraphicsEffect(new QGraphicsDropShadowEffect);
item->setPen(Qt::NoPen);
item->setBrush(Qt::red);
scene.addItem(item);
QPainter p(&img);
scene.render(&p, img.rect(), QRect(-64, -64, 128, 128));
p.end();
for (int y = 1; y < img.height(); ++y)
for (int x = 0; x < img.width(); ++x)
QCOMPARE(img.pixel(x, y), img.pixel(x, y-1));
}
class MyGraphicsItem : public QGraphicsWidget
{
public:
MyGraphicsItem(QGraphicsItem *parent = 0) :
QGraphicsWidget(parent), nbPaint(0)
{}
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
nbPaint++;
QGraphicsWidget::paint(painter, option, widget);
}
int nbPaint;
};
void tst_QGraphicsEffect::childrenVisibilityShouldInvalidateCache()
{
QGraphicsScene scene;
MyGraphicsItem parent;
parent.resize(200, 200);
QGraphicsWidget child(&parent);
child.resize(200, 200);
child.setVisible(false);
scene.addItem(&parent);
QGraphicsView view(&scene);
view.show();
QApplication::setActiveWindow(&view);
QVERIFY(QTest::qWaitForWindowActive(&view));
QTRY_VERIFY(parent.nbPaint >= 1);
//we set an effect on the parent
parent.setGraphicsEffect(new QGraphicsDropShadowEffect(&parent));
//flush the events
QApplication::processEvents();
//new effect applied->repaint
QVERIFY(parent.nbPaint >= 2);
child.setVisible(true);
//flush the events
QApplication::processEvents();
//a new child appears we need to redraw the effect.
QVERIFY(parent.nbPaint >= 3);
}
void tst_QGraphicsEffect::prepareGeometryChangeInvalidateCache()
{
MyGraphicsItem *item = new MyGraphicsItem;
item->resize(200, 200);
QGraphicsScene scene;
scene.addItem(item);
QGraphicsView view(&scene);
view.show();
qApp->setActiveWindow(&view);
QVERIFY(QTest::qWaitForWindowActive(&view));
QTRY_VERIFY(item->nbPaint >= 1);
item->nbPaint = 0;
item->setGraphicsEffect(new QGraphicsDropShadowEffect);
QTRY_COMPARE(item->nbPaint, 1);
item->nbPaint = 0;
item->resize(300, 300);
QTRY_COMPARE(item->nbPaint, 1);
item->nbPaint = 0;
item->setPos(item->pos() + QPointF(10, 10));
QTest::qWait(50);
QCOMPARE(item->nbPaint, 0);
}
void tst_QGraphicsEffect::itemHasNoContents()
{
QGraphicsRectItem *parent = new QGraphicsRectItem;
parent->setFlag(QGraphicsItem::ItemHasNoContents);
MyGraphicsItem *child = new MyGraphicsItem;
child->setParentItem(parent);
child->resize(200, 200);
QGraphicsScene scene;
scene.addItem(parent);
QGraphicsView view(&scene);
view.show();
qApp->setActiveWindow(&view);
QVERIFY(QTest::qWaitForWindowActive(&view));
QTRY_VERIFY(child->nbPaint >= 1);
CustomEffect *effect = new CustomEffect;
parent->setGraphicsEffect(effect);
QTRY_COMPARE(effect->numRepaints, 1);
for (int i = 0; i < 3; ++i) {
effect->reset();
effect->update();
QTRY_COMPARE(effect->numRepaints, 1);
}
}
QTEST_MAIN(tst_QGraphicsEffect)
#include "tst_qgraphicseffect.moc"