void QtViewportInteractionEngine::focusEditableArea(const QRectF& caretArea, const QRectF& targetArea) { QRectF endArea = itemRectFromCSS(targetArea); qreal endItemScale = itemScaleFromCSS(innerBoundedCSSScale(2.0)); const QRectF viewportRect = m_viewport->boundingRect(); qreal x; const qreal borderOffset = 10; if ((endArea.width() + borderOffset) * endItemScale <= viewportRect.width()) { // Center the input field in the middle of the view, if it is smaller than // the view at the scale target. x = viewportRect.center().x() - endArea.width() * endItemScale / 2.0; } else { // Ensure that the caret always has borderOffset contents pixels to the right // of it, and secondarily (if possible), that the area has borderOffset // contents pixels to the left of it. qreal caretOffset = itemCoordFromCSS(caretArea.x()) - endArea.x(); x = qMin(viewportRect.width() - (caretOffset + borderOffset) * endItemScale, borderOffset * endItemScale); } const QPointF hotspot = QPointF(endArea.x(), endArea.center().y()); const QPointF viewportHotspot = QPointF(x, /* FIXME: visibleCenter */ viewportRect.center().y()); QPointF endPosition = hotspot * endItemScale - viewportHotspot; QRectF endPosRange = computePosRangeForItemAtScale(endItemScale); endPosition = boundPosition(endPosRange.topLeft(), endPosition, endPosRange.bottomRight()); QRectF endVisibleContentRect(endPosition / endItemScale, viewportRect.size() / endItemScale); animateItemRectVisible(endVisibleContentRect); }
void QtViewportInteractionEngine::zoomToAreaGestureEnded(const QPointF& touchPoint, const QRectF& targetArea) { if (!targetArea.isValid()) return; if (scrollAnimationActive() || scaleAnimationActive()) return; const int margin = 10; // We want at least a little bit or margin. QRectF endArea = itemRectFromCSS(targetArea.adjusted(-margin, -margin, margin, margin)); const QRectF viewportRect = m_viewport->boundingRect(); qreal targetCSSScale = cssScaleFromItem(viewportRect.size().width() / endArea.size().width()); qreal endItemScale = itemScaleFromCSS(innerBoundedCSSScale(qMin(targetCSSScale, qreal(2.5)))); // We want to end up with the target area filling the whole width of the viewport (if possible), // and centralized vertically where the user requested zoom. Thus our hotspot is the center of // the targetArea x-wise and the requested zoom position, y-wise. const QPointF hotspot = QPointF(endArea.center().x(), touchPoint.y() * m_constraints.devicePixelRatio); const QPointF viewportHotspot = viewportRect.center(); QPointF endPosition = hotspot * endItemScale - viewportHotspot; QRectF endPosRange = computePosRangeForItemAtScale(endItemScale); endPosition = boundPosition(endPosRange.topLeft(), endPosition, endPosRange.bottomRight()); QRectF endVisibleContentRect(endPosition / endItemScale, viewportRect.size() / endItemScale); animateItemRectVisible(endVisibleContentRect); }
bool QtViewportInteractionEngine::ensureContentWithinViewportBoundary(bool immediate) { ASSERT(m_suspendCount); if (scrollAnimationActive() || scaleAnimationActive()) return false; qreal endItemScale = itemScaleFromCSS(innerBoundedCSSScale(currentCSSScale())); const QRectF viewportRect = m_viewport->boundingRect(); QPointF viewportHotspot = viewportRect.center(); QPointF endPosition = m_viewport->mapToWebContent(viewportHotspot) * endItemScale - viewportHotspot; QRectF endPosRange = computePosRangeForItemAtScale(endItemScale); endPosition = boundPosition(endPosRange.topLeft(), endPosition, endPosRange.bottomRight()); QRectF endVisibleContentRect(endPosition / endItemScale, viewportRect.size() / endItemScale); if (immediate) { setItemRectVisible(endVisibleContentRect); return true; } return !animateItemRectVisible(endVisibleContentRect); }
void QtViewportInteractionEngine::pinchGestureEnded() { ASSERT(m_suspendCount); if (!m_allowsUserScaling) return; m_pinchStartScale = -1; animateItemRectVisible(nearestValidBounds()); m_scaleUpdateDeferrer.clear(); // Clear after starting potential animation, which takes over deferring. }
void QtViewportInteractionEngine::zoomToAreaGestureEnded(const QPointF& touchPoint, const QRectF& targetArea) { if (!targetArea.isValid()) return; if (scrollAnimationActive() || scaleAnimationActive()) return; const int margin = 10; // We want at least a little bit of margin. QRectF endArea = itemRectFromCSS(targetArea.adjusted(-margin, -margin, margin, margin)); const QRectF viewportRect = m_viewport->boundingRect(); qreal targetCSSScale = cssScaleFromItem(viewportRect.size().width() / endArea.size().width()); qreal endItemScale = itemScaleFromCSS(innerBoundedCSSScale(qMin(targetCSSScale, qreal(2.5)))); qreal currentScale = m_content->contentsScale(); // We want to end up with the target area filling the whole width of the viewport (if possible), // and centralized vertically where the user requested zoom. Thus our hotspot is the center of // the targetArea x-wise and the requested zoom position, y-wise. const QPointF hotspot = QPointF(endArea.center().x(), touchPoint.y() * m_devicePixelRatio); const QPointF viewportHotspot = viewportRect.center(); QPointF endPosition = hotspot * endItemScale - viewportHotspot; QRectF endPosRange = computePosRangeForItemAtScale(endItemScale); endPosition = boundPosition(endPosRange.topLeft(), endPosition, endPosRange.bottomRight()); QRectF endVisibleContentRect(endPosition / endItemScale, viewportRect.size() / endItemScale); enum { ZoomIn, ZoomBack, ZoomOut, NoZoom } zoomAction = ZoomIn; if (!m_scaleStack.isEmpty()) { // Zoom back out if attempting to scale to the same current scale, or // attempting to continue scaling out from the inner most level. // Use fuzzy compare with a fixed error to be able to deal with largish differences due to pixel rounding. if (fuzzyCompare(endItemScale, currentScale, 0.01)) { // If moving the viewport would expose more of the targetRect and move at least 40 pixels, update position but do not scale out. QRectF currentContentRect(m_viewport->contentPos() / currentScale, viewportRect.size() / currentScale); QRectF targetIntersection = endVisibleContentRect.intersected(targetArea); if (!currentContentRect.contains(targetIntersection) && (qAbs(endVisibleContentRect.top() - currentContentRect.top()) >= 40 || qAbs(endVisibleContentRect.left() - currentContentRect.left()) >= 40)) zoomAction = NoZoom; else zoomAction = ZoomBack; } else if (fuzzyCompare(endItemScale, m_zoomOutScale, 0.01)) zoomAction = ZoomBack; else if (endItemScale < currentScale) zoomAction = ZoomOut; } switch (zoomAction) { case ZoomIn: m_scaleStack.append(ScaleStackItem(currentScale, m_viewport->contentPos().x())); m_zoomOutScale = endItemScale; break; case ZoomBack: { ScaleStackItem lastScale = m_scaleStack.takeLast(); endItemScale = lastScale.scale; // Recalculate endPosition and bound it according to new scale. endPosition.setY(hotspot.y() * endItemScale - viewportHotspot.y()); endPosition.setX(lastScale.xPosition); endPosRange = computePosRangeForItemAtScale(endItemScale); endPosition = boundPosition(endPosRange.topLeft(), endPosition, endPosRange.bottomRight()); endVisibleContentRect = QRectF(endPosition / endItemScale, viewportRect.size() / endItemScale); break; } case ZoomOut: // Unstack all scale-levels deeper than the new level, so a zoom-back won't end up zooming in. while (!m_scaleStack.isEmpty() && m_scaleStack.last().scale >= endItemScale) m_scaleStack.removeLast(); m_zoomOutScale = endItemScale; break; case NoZoom: break; } animateItemRectVisible(endVisibleContentRect); }