Add an example spinner.

Also add missing increment/decrementCurrentIndex() slots to PathView,
and tweak the number of points cached along a Path.

10 files changed, 125 insertions, 6 deletions

diff --git a/examples/declarative/declarative.pro b/examples/declarative/declarative.pro
index ba9b628..913b2b0 100644
--- a/examples/declarative/declarative.pro
+++ b/examples/declarative/declarative.pro
@@ -37,6 +37,7 @@ sources.files = \
    scrollbar \
    searchbox \
    slideswitch \
+   spinner \
    sql \
    states \
    tabwidget \
diff --git a/examples/declarative/spinner/content/Spinner.qml b/examples/declarative/spinner/content/Spinner.qml
new file mode 100644
index 0000000..8145a28
--- /dev/null
+++ b/examples/declarative/spinner/content/Spinner.qml
@@ -0,0 +1,25 @@
+import Qt 4.7
+
+Image {
+    property alias model: view.model
+    property alias delegate: view.delegate
+    property alias currentIndex: view.currentIndex
+    property real itemHeight: 30
+    source: "spinner-bg.png"
+    clip: true
+    PathView {
+        id: view
+        anchors.fill: parent
+        pathItemCount: height/itemHeight
+        preferredHighlightBegin: 0.5
+        preferredHighlightEnd: 0.5
+        highlight: Image { source: "spinner-select.png"; width: view.width; height: itemHeight+4 }
+        dragMargin: view.width/2
+        path: Path {
+            startX: view.width/2; startY: -itemHeight/2
+            PathLine { x: view.width/2; y: view.pathItemCount*itemHeight + itemHeight }
+        }
+    }
+    Keys.onDownPressed: view.incrementCurrentIndex()
+    Keys.onUpPressed: view.decrementCurrentIndex()
+}
diff --git a/examples/declarative/spinner/content/spinner-bg.png b/examples/declarative/spinner/content/spinner-bg.png
new file mode 100644
index 0000000..b3556f1
--- /dev/null
+++ b/examples/declarative/spinner/content/spinner-bg.png
diff --git a/examples/declarative/spinner/content/spinner-select.png b/examples/declarative/spinner/content/spinner-select.png
new file mode 100644
index 0000000..95a17a1
--- /dev/null
+++ b/examples/declarative/spinner/content/spinner-select.png
diff --git a/examples/declarative/spinner/main.qml b/examples/declarative/spinner/main.qml
new file mode 100644
index 0000000..6be567a
--- /dev/null
+++ b/examples/declarative/spinner/main.qml
@@ -0,0 +1,18 @@
+import Qt 4.7
+import "content"
+
+Rectangle {
+    width: 240; height: 320
+    Column {
+        y: 20; x: 20; spacing: 20
+        Spinner {
+            id: spinner
+            width: 200; height: 240
+            focus: true
+            model: 20
+            itemHeight: 30
+            delegate: Text { font.pixelSize: 25; text: index; height: 30 }
+        }
+        Text { text: "Current item index: " + spinner.currentIndex }
+    }
+}
diff --git a/examples/declarative/spinner/spinner.qmlproject b/examples/declarative/spinner/spinner.qmlproject
new file mode 100644
index 0000000..d4909f8
--- /dev/null
+++ b/examples/declarative/spinner/spinner.qmlproject
@@ -0,0 +1,16 @@
+import QmlProject 1.0
+
+Project {
+    /* Include .qml, .js, and image files from current directory and subdirectories */
+    QmlFiles {
+        directory: "."
+    }
+    JavaScriptFiles {
+        directory: "."
+    }
+    ImageFiles {
+        directory: "."
+    }
+    /* List of plugin directories passed to QML runtime */
+    // importPaths: [ " ../exampleplugin " ]
+}
diff --git a/src/declarative/graphicsitems/qdeclarativepath.cpp b/src/declarative/graphicsitems/qdeclarativepath.cpp
index 3d0df87..2d08c7c 100644
--- a/src/declarative/graphicsitems/qdeclarativepath.cpp
+++ b/src/declarative/graphicsitems/qdeclarativepath.cpp
@@ -377,7 +377,9 @@ void QDeclarativePath::createPointCache() const
 {
     Q_D(const QDeclarativePath);
     qreal pathLength = d->_path.length();
-    const int points = int(pathLength*2);
+    // more points means less jitter between items as they move along the
+    // path, but takes longer to generate
+    const int points = int(pathLength*5);
     const int lastElement = d->_path.elementCount() - 1;
     d->_pointCache.resize(points+1);
 
diff --git a/src/declarative/graphicsitems/qdeclarativepathview.cpp b/src/declarative/graphicsitems/qdeclarativepathview.cpp
index 503d096..207cc25 100644
--- a/src/declarative/graphicsitems/qdeclarativepathview.cpp
+++ b/src/declarative/graphicsitems/qdeclarativepathview.cpp
@@ -49,6 +49,7 @@
 #include <qlistmodelinterface_p.h>
 #include <QGraphicsSceneEvent>
 
+#include <qmath.h>
 #include <math.h>
 
 QT_BEGIN_NAMESPACE
@@ -279,8 +280,8 @@ void QDeclarativePathViewPrivate::updateItem(QDeclarativeItem *item, qreal perce
             att->setValue(attr.toUtf8(), path->attributeAt(attr, percent));
     }
     QPointF pf = path->pointAt(percent);
-    item->setX(pf.x() - item->width()*item->scale()/2);
-    item->setY(pf.y() - item->height()*item->scale()/2);
+    item->setX(qRound(pf.x() - item->width()*item->scale()/2));
+    item->setY(qRound(pf.y() - item->height()*item->scale()/2));
 }
 
 void QDeclarativePathViewPrivate::regenerate()
@@ -527,6 +528,33 @@ void QDeclarativePathView::setCurrentIndex(int idx)
 }
 
 /*!
+    \qmlmethod PathView::incrementCurrentIndex()
+
+    Increments the current index.
+*/
+void QDeclarativePathView::incrementCurrentIndex()
+{
+    setCurrentIndex(currentIndex()+1);
+}
+
+
+/*!
+    \qmlmethod PathView::decrementCurrentIndex()
+
+    Decrements the current index.
+*/
+void QDeclarativePathView::decrementCurrentIndex()
+{
+    Q_D(QDeclarativePathView);
+    if (d->model && d->model->count()) {
+        int idx = currentIndex()-1;
+        if (idx < 0)
+            idx = d->model->count() - 1;
+        setCurrentIndex(idx);
+    }
+}
+
+/*!
     \qmlproperty real PathView::offset
 
     The offset specifies how far along the path the items are from their initial positions.
@@ -1312,6 +1340,7 @@ int QDeclarativePathViewPrivate::calcCurrentIndex()
         if (offset < 0)
             offset += model->count();
         current = qRound(qAbs(qmlMod(model->count() - offset, model->count())));
+        current = current % model->count();
     }
 
     return current;
diff --git a/src/declarative/graphicsitems/qdeclarativepathview_p.h b/src/declarative/graphicsitems/qdeclarativepathview_p.h
index 85f47fd..349a01c 100644
--- a/src/declarative/graphicsitems/qdeclarativepathview_p.h
+++ b/src/declarative/graphicsitems/qdeclarativepathview_p.h
@@ -132,6 +132,10 @@ public:
 
     static QDeclarativePathViewAttached *qmlAttachedProperties(QObject *);
 
+public Q_SLOTS:
+    void incrementCurrentIndex();
+    void decrementCurrentIndex();
+
 Q_SIGNALS:
     void currentIndexChanged();
     void offsetChanged();
diff --git a/tests/auto/declarative/qdeclarativepathview/tst_qdeclarativepathview.cpp b/tests/auto/declarative/qdeclarativepathview/tst_qdeclarativepathview.cpp
index 62d0b89..0e16f66 100644
--- a/tests/auto/declarative/qdeclarativepathview/tst_qdeclarativepathview.cpp
+++ b/tests/auto/declarative/qdeclarativepathview/tst_qdeclarativepathview.cpp
@@ -438,7 +438,8 @@ void tst_QDeclarativePathView::pathMoved()
 
     for(int i=0; i<model.count(); i++){
         QDeclarativeRectangle *curItem = findItem<QDeclarativeRectangle>(pathview, "wrapper", i);
-        QCOMPARE(curItem->pos() + offset, path->pointAt(0.25 + i*0.25));
+        QPointF itemPos(path->pointAt(0.25 + i*0.25));
+        QCOMPARE(curItem->pos() + offset, QPointF(qRound(itemPos.x()), qRound(itemPos.y())));
     }
 
     pathview->setOffset(0.0);
@@ -479,13 +480,36 @@ void tst_QDeclarativePathView::setCurrentIndex()
     QCOMPARE(canvas->rootObject()->property("currentB").toInt(), 0);
 
     pathview->setCurrentIndex(2);
-    QTest::qWait(1000);
 
     firstItem = findItem<QDeclarativeRectangle>(pathview, "wrapper", 2);
-    QCOMPARE(firstItem->pos() + offset, start);
+    QTRY_COMPARE(firstItem->pos() + offset, start);
     QCOMPARE(canvas->rootObject()->property("currentA").toInt(), 2);
     QCOMPARE(canvas->rootObject()->property("currentB").toInt(), 2);
 
+    pathview->decrementCurrentIndex();
+    QTRY_COMPARE(pathview->currentIndex(), 1);
+    firstItem = findItem<QDeclarativeRectangle>(pathview, "wrapper", 1);
+    QVERIFY(firstItem);
+    QTRY_COMPARE(firstItem->pos() + offset, start);
+
+    pathview->decrementCurrentIndex();
+    QTRY_COMPARE(pathview->currentIndex(), 0);
+    firstItem = findItem<QDeclarativeRectangle>(pathview, "wrapper", 0);
+    QVERIFY(firstItem);
+    QTRY_COMPARE(firstItem->pos() + offset, start);
+
+    pathview->decrementCurrentIndex();
+    QTRY_COMPARE(pathview->currentIndex(), 3);
+    firstItem = findItem<QDeclarativeRectangle>(pathview, "wrapper", 3);
+    QVERIFY(firstItem);
+    QTRY_COMPARE(firstItem->pos() + offset, start);
+
+    pathview->incrementCurrentIndex();
+    QTRY_COMPARE(pathview->currentIndex(), 0);
+    firstItem = findItem<QDeclarativeRectangle>(pathview, "wrapper", 0);
+    QVERIFY(firstItem);
+    QTRY_COMPARE(firstItem->pos() + offset, start);
+
     delete canvas;
 }