From 031ab2136c632d582a324941798be9e37825d287 Mon Sep 17 00:00:00 2001 From: Martin Jones Date: Mon, 29 Nov 2010 11:01:46 +1000 Subject: Allow resizing Flickable content about a center point. Useful for zooming via pinch, for example. Task-number: QTBUG-15148 Reviewed-by: Aaron Kennedy --- .../graphicsitems/qdeclarativeflickable.cpp | 54 ++++++++++++++++++++++ .../graphicsitems/qdeclarativeflickable_p.h | 4 ++ .../qdeclarativeflickable/data/resize.qml | 27 +++++++++++ .../tst_qdeclarativeflickable.cpp | 54 ++++++++++++++++++++++ 4 files changed, 139 insertions(+) create mode 100644 tests/auto/declarative/qdeclarativeflickable/data/resize.qml diff --git a/src/declarative/graphicsitems/qdeclarativeflickable.cpp b/src/declarative/graphicsitems/qdeclarativeflickable.cpp index 377f3b5..b13d82b 100644 --- a/src/declarative/graphicsitems/qdeclarativeflickable.cpp +++ b/src/declarative/graphicsitems/qdeclarativeflickable.cpp @@ -1269,6 +1269,60 @@ void QDeclarativeFlickable::setContentHeight(qreal h) d->updateBeginningEnd(); } +/*! + \qmlmethod Flickable::resizeContent(real width, real height, QPointF center) + \preliminary + + Resizes the content to \a width x \a height about \a center. + + \bold {This method was added in QtQuick 1.1.} + + This does not scale the contents of the Flickable - it only resizes the \l contentWidth + and \l contentHeight. + + Resizing the content may result in the content being positioned outside + the bounds of the Flickable. Calling \l returnToBounds() will + move the content back within legal bounds. +*/ +void QDeclarativeFlickable::resizeContent(qreal w, qreal h, QPointF center) +{ + Q_D(QDeclarativeFlickable); + if (w != d->hData.viewSize) { + qreal oldSize = d->hData.viewSize; + setContentWidth(w); + if (center.x() != 0) { + qreal pos = center.x() * w / oldSize; + setContentX(contentX() + pos - center.x()); + } + } + if (h != d->vData.viewSize) { + qreal oldSize = d->vData.viewSize; + setContentHeight(h); + if (center.y() != 0) { + qreal pos = center.y() * h / oldSize; + setContentY(contentY() + pos - center.y()); + } + } +} + +/*! + \qmlmethod Flickable::returnToBounds() + \preliminary + + Ensures the content is within legal bounds. + + \bold {This method was added in QtQuick 1.1.} + + This may be called to ensure that the content is within legal bounds + after manually positioning the content. +*/ +void QDeclarativeFlickable::returnToBounds() +{ + Q_D(QDeclarativeFlickable); + d->fixupX(); + d->fixupY(); +} + qreal QDeclarativeFlickable::vWidth() const { Q_D(const QDeclarativeFlickable); diff --git a/src/declarative/graphicsitems/qdeclarativeflickable_p.h b/src/declarative/graphicsitems/qdeclarativeflickable_p.h index 6e4d8ed..ece2db7 100644 --- a/src/declarative/graphicsitems/qdeclarativeflickable_p.h +++ b/src/declarative/graphicsitems/qdeclarativeflickable_p.h @@ -149,6 +149,10 @@ public: FlickableDirection flickableDirection() const; void setFlickableDirection(FlickableDirection); + //XXX Added in QtQuick 1.1 + Q_INVOKABLE void resizeContent(qreal w, qreal h, QPointF center); + Q_INVOKABLE void returnToBounds(); + Q_SIGNALS: void contentWidthChanged(); void contentHeightChanged(); diff --git a/tests/auto/declarative/qdeclarativeflickable/data/resize.qml b/tests/auto/declarative/qdeclarativeflickable/data/resize.qml new file mode 100644 index 0000000..e2abb99 --- /dev/null +++ b/tests/auto/declarative/qdeclarativeflickable/data/resize.qml @@ -0,0 +1,27 @@ +import QtQuick 1.1 + +Rectangle { + function resizeContent() { + flick.resizeContent(600, 600, Qt.point(100, 100)) + } + function returnToBounds() { + flick.returnToBounds() + } + width: 400 + height: 360 + color: "gray" + + Flickable { + id: flick + objectName: "flick" + anchors.fill: parent + contentWidth: 300 + contentHeight: 300 + + Rectangle { + width: flick.contentWidth + height: flick.contentHeight + color: "red" + } + } +} diff --git a/tests/auto/declarative/qdeclarativeflickable/tst_qdeclarativeflickable.cpp b/tests/auto/declarative/qdeclarativeflickable/tst_qdeclarativeflickable.cpp index 25edb36..c1564bc 100644 --- a/tests/auto/declarative/qdeclarativeflickable/tst_qdeclarativeflickable.cpp +++ b/tests/auto/declarative/qdeclarativeflickable/tst_qdeclarativeflickable.cpp @@ -46,6 +46,7 @@ #include #include #include +#include "../../../shared/util.h" #ifdef Q_OS_SYMBIAN // In Symbian OS test data is located in applications private dir @@ -69,6 +70,8 @@ private slots: void pressDelay(); void flickableDirection(); void qgraphicswidget(); + void resizeContent(); + void returnToBounds(); private: QDeclarativeEngine engine; @@ -277,6 +280,57 @@ void tst_qdeclarativeflickable::qgraphicswidget() QVERIFY(widget); } +// QtQuick 1.1 +void tst_qdeclarativeflickable::resizeContent() +{ + QDeclarativeEngine engine; + QDeclarativeComponent c(&engine, QUrl::fromLocalFile(SRCDIR "/data/resize.qml")); + QDeclarativeItem *root = qobject_cast(c.create()); + QDeclarativeFlickable *obj = findItem(root, "flick"); + + QVERIFY(obj != 0); + QCOMPARE(obj->contentX(), 0.); + QCOMPARE(obj->contentY(), 0.); + QCOMPARE(obj->contentWidth(), 300.); + QCOMPARE(obj->contentHeight(), 300.); + + QMetaObject::invokeMethod(root, "resizeContent"); + + QCOMPARE(obj->contentX(), 100.); + QCOMPARE(obj->contentY(), 100.); + QCOMPARE(obj->contentWidth(), 600.); + QCOMPARE(obj->contentHeight(), 600.); + + delete root; +} + +// QtQuick 1.1 +void tst_qdeclarativeflickable::returnToBounds() +{ + QDeclarativeEngine engine; + QDeclarativeComponent c(&engine, QUrl::fromLocalFile(SRCDIR "/data/resize.qml")); + QDeclarativeItem *root = qobject_cast(c.create()); + QDeclarativeFlickable *obj = findItem(root, "flick"); + + QVERIFY(obj != 0); + QCOMPARE(obj->contentX(), 0.); + QCOMPARE(obj->contentY(), 0.); + QCOMPARE(obj->contentWidth(), 300.); + QCOMPARE(obj->contentHeight(), 300.); + + obj->setContentX(100); + obj->setContentY(400); + QTRY_COMPARE(obj->contentX(), 100.); + QTRY_COMPARE(obj->contentY(), 400.); + + QMetaObject::invokeMethod(root, "returnToBounds"); + + QTRY_COMPARE(obj->contentX(), 0.); + QTRY_COMPARE(obj->contentY(), 0.); + + delete root; +} + template T *tst_qdeclarativeflickable::findItem(QGraphicsObject *parent, const QString &objectName) { -- cgit v0.12