DeclarativeObserver: Don't fade in the highlight edge

It feels more responsive when the highlight is immediately visible.

Change-Id: Ie3dd0693ecc38f33b001c86970b220b45b37fdfc
Reviewed-by: Kai Koehne
(cherry picked from Qt 4.8 commit 0b4e028ec294992df01430bdf978982835c7df5c)
Reviewed-on: http://codereview.qt.nokia.com/248
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Kai Koehne <kai.koehne@nokia.com>

share/qtcreator/qml/qmljsdebugger/editor/boundingrecthighlighter.cpp

@@ -42,10 +42,6 @@
 
 namespace QmlJSDebugger {
 
-const qreal AnimDelta = 0.025f;
-const int AnimInterval = 30;
-const int AnimFrames = 10;
-
 BoundingBox::BoundingBox(QGraphicsObject *itemToHighlight, QGraphicsItem *parentItem,
                          QObject *parent)
     : QObject(parent),
@@ -83,12 +79,8 @@ int BoundingBoxPolygonItem::type() const
 
 BoundingRectHighlighter::BoundingRectHighlighter(QDeclarativeViewInspector *view) :
     LiveLayerItem(view->declarativeView()->scene()),
-    m_view(view),
-    m_animFrame(0)
+    m_view(view)
 {
-    m_animTimer = new QTimer(this);
-    m_animTimer->setInterval(AnimInterval);
-    connect(m_animTimer, SIGNAL(timeout()), SLOT(animTimeout()));
 }
 
 BoundingRectHighlighter::~BoundingRectHighlighter()
@@ -96,37 +88,17 @@ BoundingRectHighlighter::~BoundingRectHighlighter()
 
 }
 
-void BoundingRectHighlighter::animTimeout()
-{
-    ++m_animFrame;
-    if (m_animFrame == AnimFrames) {
-        m_animTimer->stop();
-    }
-
-    qreal alpha = m_animFrame / float(AnimFrames);
-
-    foreach (BoundingBox *box, m_boxes) {
-        box->highlightPolygonEdge->setOpacity(alpha);
-    }
-}
-
 void BoundingRectHighlighter::clear()
 {
-    if (m_boxes.length()) {
-        m_animTimer->stop();
-
-        foreach (BoundingBox *box, m_boxes) {
-            freeBoundingBox(box);
-        }
-    }
+    foreach (BoundingBox *box, m_boxes)
+        freeBoundingBox(box);
 }
 
 BoundingBox *BoundingRectHighlighter::boxFor(QGraphicsObject *item) const
 {
     foreach (BoundingBox *box, m_boxes) {
-        if (box->highlightedObject.data() == item) {
+        if (box->highlightedObject.data() == item)
             return box;
-        }
     }
     return 0;
 }
@@ -136,15 +108,11 @@ void BoundingRectHighlighter::highlight(QList<QGraphicsObject*> items)
     if (items.isEmpty())
         return;
 
-    bool animate = false;
-
     QList<BoundingBox *> newBoxes;
     foreach (QGraphicsObject *itemToHighlight, items) {
         BoundingBox *box = boxFor(itemToHighlight);
-        if (!box) {
+        if (!box)
             box = createBoundingBox(itemToHighlight);
-            animate = true;
-        }
 
         newBoxes << box;
     }
@@ -155,7 +123,7 @@ void BoundingRectHighlighter::highlight(QList<QGraphicsObject*> items)
         m_boxes << newBoxes;
     }
 
-    highlightAll(animate);
+    highlightAll();
 }
 
 void BoundingRectHighlighter::highlight(QGraphicsObject* itemToHighlight)
@@ -163,17 +131,14 @@ void BoundingRectHighlighter::highlight(QGraphicsObject* itemToHighlight)
     if (!itemToHighlight)
         return;
 
-    bool animate = false;
-
     BoundingBox *box = boxFor(itemToHighlight);
     if (!box) {
         box = createBoundingBox(itemToHighlight);
         m_boxes << box;
-        animate = true;
         qSort(m_boxes);
     }
 
-    highlightAll(animate);
+    highlightAll();
 }
 
 BoundingBox *BoundingRectHighlighter::createBoundingBox(QGraphicsObject *itemToHighlight)
@@ -234,7 +199,7 @@ void BoundingRectHighlighter::itemDestroyed(QObject *obj)
     }
 }
 
-void BoundingRectHighlighter::highlightAll(bool animate)
+void BoundingRectHighlighter::highlightAll()
 {
     foreach (BoundingBox *box, m_boxes) {
         if (box && box->highlightedObject.isNull()) {
@@ -252,21 +217,13 @@ void BoundingRectHighlighter::highlightAll(bool animate)
 
         box->highlightPolygon->setPolygon(QPolygonF(bboxRect));
         box->highlightPolygonEdge->setPolygon(QPolygonF(edgeRect));
-
-        if (animate)
-            box->highlightPolygonEdge->setOpacity(0);
-    }
-
-    if (animate) {
-        m_animFrame = 0;
-        m_animTimer->start();
     }
 }
 
 void BoundingRectHighlighter::refresh()
 {
     if (!m_boxes.isEmpty())
-        highlightAll(true);
+        highlightAll();
 }
 
 

share/qtcreator/qml/qmljsdebugger/editor/boundingrecthighlighter.h

@@ -61,12 +61,11 @@ public:
 
 private slots:
     void refresh();
-    void animTimeout();
     void itemDestroyed(QObject *);
 
 private:
     BoundingBox *boxFor(QGraphicsObject *item) const;
-    void highlightAll(bool animate);
+    void highlightAll();
     BoundingBox *createBoundingBox(QGraphicsObject *itemToHighlight);
     void removeBoundingBox(BoundingBox *box);
     void freeBoundingBox(BoundingBox *box);
@@ -77,10 +76,6 @@ private:
     QDeclarativeViewInspector *m_view;
     QList<BoundingBox* > m_boxes;
     QList<BoundingBox* > m_freeBoxes;
-    QTimer *m_animTimer;
-    qreal m_animScale;
-    int m_animFrame;
-
 };
 
 class BoundingBox : public QObject