Changeset 846 for trunk/src/gui/graphicsview/qgraphicsview.cpp

Timestamp:

May 5, 2011, 5:36:53 AM (14 years ago)

Author:

Dmitry A. Kuminov

Message:

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.

Location:

trunk

Files:

• . (modified) (1 prop)
• src/gui/graphicsview/qgraphicsview.cpp (modified) (18 diffs)

trunk/src/gui/graphicsview/qgraphicsview.cpp

@@ -1 +1 @@
 /****************************************************************************
 **
-** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
@@ -54 +54 @@
     QGraphicsView visualizes the contents of a QGraphicsScene in a scrollable
     viewport. To create a scene with geometrical items, see QGraphicsScene's
-    documentation. QGraphicsView is part of \l{The Graphics View Framework}.
+    documentation. QGraphicsView is part of the \l{Graphics View Framework}.
 
     To visualize a scene, you start by constructing a QGraphicsView object,
@@ -328 +328 @@
       sceneInteractionAllowed(true), hasSceneRect(false),
       connectedToScene(false),
-      mousePressButton(Qt::NoButton),
+      useLastMouseEvent(false),
       identityMatrix(true),
       dirtyScroll(true),
       accelerateScrolling(true),
+      keepLastCenterPoint(true),
+      transforming(false),
+      handScrolling(false),
+      mustAllocateStyleOptions(false),
+      mustResizeBackgroundPixmap(true),
+      fullUpdatePending(true),
+      hasUpdateClip(false),
+      mousePressButton(Qt::NoButton),
       leftIndent(0), topIndent(0),
       lastMouseEvent(QEvent::None, QPoint(), Qt::NoButton, 0, 0),
-      useLastMouseEvent(false),
-      keepLastCenterPoint(true),
       alignment(Qt::AlignCenter),
-      transforming(false),
       transformationAnchor(QGraphicsView::AnchorViewCenter), resizeAnchor(QGraphicsView::NoAnchor),
       viewportUpdateMode(QGraphicsView::MinimalViewportUpdate),
@@ -346 +351 @@
       rubberBandSelectionMode(Qt::IntersectsItemShape),
 #endif
-      handScrolling(false), handScrollMotions(0), cacheMode(0),
-      mustAllocateStyleOptions(false),
-      mustResizeBackgroundPixmap(true),
+      handScrollMotions(0), cacheMode(0),
 #ifndef QT_NO_CURSOR
       hasStoredOriginalCursor(false),
 #endif
       lastDragDropEvent(0),
-      fullUpdatePending(true),
       updateSceneSlotReimplementedChecked(false)
 {
@@ -734 +736 @@
 
     // Restore the original viewport cursor.
-    hasStoredOriginalCursor = false;
-    if (dragMode == QGraphicsView::ScrollHandDrag)
-        viewport->setCursor(Qt::OpenHandCursor);
-    else
-        viewport->setCursor(originalCursor);
+    if (hasStoredOriginalCursor) {
+        hasStoredOriginalCursor = false;
+        if (dragMode == QGraphicsView::ScrollHandDrag)
+            viewport->setCursor(Qt::OpenHandCursor);
+        else
+            viewport->setCursor(originalCursor);
+    }
 }
 #endif
@@ -853 +857 @@
         viewport->update();
     } else if (viewportUpdateMode == QGraphicsView::BoundingRectViewportUpdate) {
-        if (optimizationFlags & QGraphicsView::DontAdjustForAntialiasing)
-            viewport->update(dirtyBoundingRect.adjusted(-1, -1, 1, 1));
-        else
-            viewport->update(dirtyBoundingRect.adjusted(-2, -2, 2, 2));
+        viewport->update(dirtyBoundingRect);
     } else {
         viewport->update(dirtyRegion); // Already adjusted in updateRect/Region.
@@ -881 +882 @@
 }
 
-bool QGraphicsViewPrivate::updateRegion(const QRegion &r)
-{
-    if (fullUpdatePending || viewportUpdateMode == QGraphicsView::NoViewportUpdate || r.isEmpty())
+/*
+   Calling this function results in update rects being clipped to the item's
+   bounding rect. Note that updates prior to this function call is not clipped.
+   The clip is removed by passing 0.
+*/
+void QGraphicsViewPrivate::setUpdateClip(QGraphicsItem *item)
+{
+    Q_Q(QGraphicsView);
+    // We simply ignore the request if the update mode is either FullViewportUpdate
+    // or NoViewportUpdate; in that case there's no point in clipping anything.
+    if (!item || viewportUpdateMode == QGraphicsView::NoViewportUpdate
+        || viewportUpdateMode == QGraphicsView::FullViewportUpdate) {
+        hasUpdateClip = false;
+        return;
+    }
+
+    // Calculate the clip (item's bounding rect in view coordinates).
+    // Optimized version of:
+    // QRect clip = item->deviceTransform(q->viewportTransform())
+    //              .mapRect(item->boundingRect()).toAlignedRect();
+    QRect clip;
+    if (item->d_ptr->itemIsUntransformable()) {
+        QTransform xform = item->deviceTransform(q->viewportTransform());
+        clip = xform.mapRect(item->boundingRect()).toAlignedRect();
+    } else if (item->d_ptr->sceneTransformTranslateOnly && identityMatrix) {
+        QRectF r(item->boundingRect());
+        r.translate(item->d_ptr->sceneTransform.dx() - horizontalScroll(),
+                    item->d_ptr->sceneTransform.dy() - verticalScroll());
+        clip = r.toAlignedRect();
+    } else if (!q->isTransformed()) {
+        clip = item->d_ptr->sceneTransform.mapRect(item->boundingRect()).toAlignedRect();
+    } else {
+        QTransform xform = item->d_ptr->sceneTransform;
+        xform *= q->viewportTransform();
+        clip = xform.mapRect(item->boundingRect()).toAlignedRect();
+    }
+
+    if (hasUpdateClip) {
+        // Intersect with old clip.
+        updateClip &= clip;
+    } else {
+        updateClip = clip;
+        hasUpdateClip = true;
+    }
+}
+
+bool QGraphicsViewPrivate::updateRegion(const QRectF &rect, const QTransform &xform)
+{
+    if (rect.isEmpty())
         return false;
 
-    const QRect boundingRect = r.boundingRect();
-    if (!intersectsViewport(boundingRect, viewport->width(), viewport->height()))
-        return false; // Update region outside viewport.
+    if (viewportUpdateMode != QGraphicsView::MinimalViewportUpdate
+        && viewportUpdateMode != QGraphicsView::SmartViewportUpdate) {
+        // No point in updating with QRegion granularity; use the rect instead.
+        return updateRectF(xform.mapRect(rect));
+    }
+
+    // Update mode is either Minimal or Smart, so we have to do a potentially slow operation,
+    // which is clearly documented here: QGraphicsItem::setBoundingRegionGranularity.
+    const QRegion region = xform.map(QRegion(rect.toAlignedRect()));
+    QRect viewRect = region.boundingRect();
+    const bool dontAdjustForAntialiasing = optimizationFlags & QGraphicsView::DontAdjustForAntialiasing;
+    if (dontAdjustForAntialiasing)
+        viewRect.adjust(-1, -1, 1, 1);
+    else
+        viewRect.adjust(-2, -2, 2, 2);
+    if (!intersectsViewport(viewRect, viewport->width(), viewport->height()))
+        return false; // Update region for sure outside viewport.
+
+    const QVector<QRect> &rects = region.rects();
+    for (int i = 0; i < rects.size(); ++i) {
+        viewRect = rects.at(i);
+        if (dontAdjustForAntialiasing)
+            viewRect.adjust(-1, -1, 1, 1);
+        else
+            viewRect.adjust(-2, -2, 2, 2);
+        if (hasUpdateClip)
+            viewRect &= updateClip;
+        dirtyRegion += viewRect;
+    }
+
+    return true;
+}
+
+// NB! Assumes the rect 'r' is already aligned and adjusted for antialiasing.
+// For QRectF use updateRectF(const QRectF &) to ensure proper adjustments.
+bool QGraphicsViewPrivate::updateRect(const QRect &r)
+{
+    if (fullUpdatePending || viewportUpdateMode == QGraphicsView::NoViewportUpdate
+        || !intersectsViewport(r, viewport->width(), viewport->height())) {
+        return false;
+    }
 
     switch (viewportUpdateMode) {
@@ -896 +981 @@
         break;
     case QGraphicsView::BoundingRectViewportUpdate:
-        QRect_unite(&dirtyBoundingRect, boundingRect);
+        if (hasUpdateClip)
+            QRect_unite(&dirtyBoundingRect, r & updateClip);
+        else
+            QRect_unite(&dirtyBoundingRect, r);
         if (containsViewport(dirtyBoundingRect, viewport->width(), viewport->height())) {
             fullUpdatePending = true;
@@ -904 +992 @@
     case QGraphicsView::SmartViewportUpdate: // ### DEPRECATE
     case QGraphicsView::MinimalViewportUpdate:
-    {
-        const QVector<QRect> &rects = r.rects();
-        for (int i = 0; i < rects.size(); ++i) {
-            if (optimizationFlags & QGraphicsView::DontAdjustForAntialiasing)
-                dirtyRegion += rects.at(i).adjusted(-1, -1, 1, 1);
-            else
-                dirtyRegion += rects.at(i).adjusted(-2, -2, 2, 2);
-        }
-        break;
-    }
-    default:
-        break;
-    }
-
-    return true;
-}
-
-bool QGraphicsViewPrivate::updateRect(const QRect &r)
-{
-    if (fullUpdatePending || viewportUpdateMode == QGraphicsView::NoViewportUpdate
-        || !intersectsViewport(r, viewport->width(), viewport->height())) {
-        return false;
-    }
-
-    switch (viewportUpdateMode) {
-    case QGraphicsView::FullViewportUpdate:
-        fullUpdatePending = true;
-        viewport->update();
-        break;
-    case QGraphicsView::BoundingRectViewportUpdate:
-        QRect_unite(&dirtyBoundingRect, r);
-        if (containsViewport(dirtyBoundingRect, viewport->width(), viewport->height())) {
-            fullUpdatePending = true;
-            viewport->update();
-        }
-        break;
-    case QGraphicsView::SmartViewportUpdate: // ### DEPRECATE
-    case QGraphicsView::MinimalViewportUpdate:
-        if (optimizationFlags & QGraphicsView::DontAdjustForAntialiasing)
-            dirtyRegion += r.adjusted(-1, -1, 1, 1);
+        if (hasUpdateClip)
+            dirtyRegion += r & updateClip;
         else
-            dirtyRegion += r.adjusted(-2, -2, 2, 2);
+            dirtyRegion += r;
         break;
     default:
@@ -1036 +1086 @@
 {
     Q_Q(QGraphicsView);
-    bool enabled = scene && scene->focusItem()
-                   && (scene->focusItem()->flags() & QGraphicsItem::ItemAcceptsInputMethod);
+    QGraphicsItem *focusItem = 0;
+    bool enabled = scene && (focusItem = scene->focusItem())
+                   && (focusItem->d_ptr->flags & QGraphicsItem::ItemAcceptsInputMethod);
     q->setAttribute(Qt::WA_InputMethodEnabled, enabled);
     q->viewport()->setAttribute(Qt::WA_InputMethodEnabled, enabled);
+
+    if (!enabled) {
+        q->setInputMethodHints(0);
+        return;
+    }
+
+    QGraphicsProxyWidget *proxy = focusItem->d_ptr->isWidget && focusItem->d_ptr->isProxyWidget()
+                                    ? static_cast<QGraphicsProxyWidget *>(focusItem) : 0;
+    if (!proxy) {
+        q->setInputMethodHints(focusItem->inputMethodHints());
+    } else if (QWidget *widget = proxy->widget()) {
+    if (QWidget *fw = widget->focusWidget())
+        widget = fw;
+        q->setInputMethodHints(widget->inputMethodHints());
+    } else {
+        q->setInputMethodHints(0);
+    }
 }
 
@@ -1808 +1876 @@
 {
     Q_D(QGraphicsView);
-    Q_UNUSED(xmargin);
-    Q_UNUSED(ymargin);
     qreal width = viewport()->width();
     qreal height = viewport()->height();
@@ -2429 +2495 @@
     QVariant value = d->scene->inputMethodQuery(query);
     if (value.type() == QVariant::RectF)
-        value = mapFromScene(value.toRectF()).boundingRect();
+        value = d->mapRectFromScene(value.toRectF());
     else if (value.type() == QVariant::PointF)
         value = mapFromScene(value.toPointF());
@@ -2531 +2597 @@
     // Convert scene rects to viewport rects.
     foreach (const QRectF &rect, rects) {
-        QRect xrect = transform.mapRect(rect).toRect();
+        QRect xrect = transform.mapRect(rect).toAlignedRect();
         if (!(d->optimizationFlags & DontAdjustForAntialiasing))
             xrect.adjust(-2, -2, 2, 2);
+        else
+            xrect.adjust(-1, -1, 1, 1);
         if (!viewportRect.intersects(xrect))
             continue;
@@ -2622 +2690 @@
     if (d->scene && !d->scene->d_func()->allItemsIgnoreTouchEvents)
         widget->setAttribute(Qt::WA_AcceptTouchEvents);
+
+#ifndef QT_NO_GESTURES
+    if (d->scene) {
+        foreach (Qt::GestureType gesture, d->scene->d_func()->grabbedGestures.keys())
+            widget->grabGesture(gesture);
+    }
+#endif
 
     widget->setAcceptDrops(acceptDrops());
@@ -2768 +2843 @@
         return true;
     }
+#ifndef QT_NO_GESTURES
     case QEvent::Gesture:
     case QEvent::GestureOverride:
@@ -2781 +2857 @@
         return true;
     }
+#endif // QT_NO_GESTURES
     default:
         break;
@@ -3384 +3461 @@
     // Items
     if (!(d->optimizationFlags & IndirectPainting)) {
+        const quint32 oldRectAdjust = d->scene->d_func()->rectAdjust;
+        if (d->optimizationFlags & QGraphicsView::DontAdjustForAntialiasing)
+            d->scene->d_func()->rectAdjust = 1;
+        else
+            d->scene->d_func()->rectAdjust = 2;
         d->scene->d_func()->drawItems(&painter, viewTransformed ? &viewTransform : 0,
                                       &d->exposedRegion, viewport());
+        d->scene->d_func()->rectAdjust = oldRectAdjust;
         // Make sure the painter's world transform is restored correctly when
         // drawing without painter state protection (DontSavePainterState).
@@ -3393 +3476 @@
         // and restore() in QGraphicsScene::drawItems().
         if (!d->scene->d_func()->painterStateProtection)
-            painter.setWorldTransform(viewTransform);
+            painter.setOpacity(1.0);
+        painter.setWorldTransform(viewTransform);
     } else {
         // Make sure we don't have unpolished items before we draw