Changeset 561 for trunk/src/gui/widgets/qabstractscrollarea.cpp

Timestamp:

Feb 11, 2010, 11:19:06 PM (15 years ago)

Author:

Dmitry A. Kuminov

Message:

trunk: Merged in qt 4.6.1 sources.

Location:

trunk

Files:

• . (modified) (1 prop)
• src/gui/widgets/qabstractscrollarea.cpp (modified) (22 diffs)

trunk/src/gui/widgets/qabstractscrollarea.cpp

@@ -2 +2 @@
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtGui module of the Qt Toolkit.
@@ -21 +22 @@
 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
-** In addition, as a special exception, Nokia gives you certain
-** additional rights. These rights are described in the Nokia Qt LGPL
-** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
-** package.
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
 **
 ** GNU General Public License Usage
@@ -34 +34 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
-** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
 ** $QT_END_LICENSE$
 **
@@ -52 +52 @@
 #include "qboxlayout.h"
 #include "qpainter.h"
+#include "qmargins.h"
 
 #include "qabstractscrollarea_p.h"
 #include <qwidget.h>
+
+#include <private/qapplication_p.h>
 
 #ifdef Q_WS_MAC
@@ -158 +161 @@
      viewport(0), cornerWidget(0), left(0), top(0), right(0), bottom(0),
      xoffset(0), yoffset(0), viewportFilter(0)
+#ifdef Q_WS_WIN
+     , singleFingerPanEnabled(false)
+#endif
 {
 }
@@ -282 +288 @@
     QObject::connect(vbar, SIGNAL(valueChanged(int)), q, SLOT(_q_vslide(int)));
     QObject::connect(vbar, SIGNAL(rangeChanged(int,int)), q, SLOT(_q_showOrHideScrollBars()), Qt::QueuedConnection);
-    viewportFilter = new QAbstractScrollAreaFilter(this);
-    viewport->installEventFilter(viewportFilter);
+    viewportFilter.reset(new QAbstractScrollAreaFilter(this));
+    viewport->installEventFilter(viewportFilter.data());
     viewport->setFocusProxy(q);
     q->setFocusPolicy(Qt::WheelFocus);
@@ -289 +295 @@
     q->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
     layoutChildren();
-}
+#ifndef Q_WS_MAC
+    viewport->grabGesture(Qt::PanGesture);
+#endif
+}
+
+#ifdef Q_WS_WIN
+void QAbstractScrollAreaPrivate::setSingleFingerPanEnabled(bool on)
+{
+    singleFingerPanEnabled = on;
+    QWidgetPrivate *dd = static_cast<QWidgetPrivate *>(QObjectPrivate::get(viewport));
+    if (dd)
+        dd->winSetupGestures();
+}
+#endif // Q_WS_WIN
 
 void QAbstractScrollAreaPrivate::layoutChildren()
@@ -460 +479 @@
 }
 
-// ### Fix for 4.4, talk to Bjoern E or Girish.
-void QAbstractScrollAreaPrivate::scrollBarPolicyChanged(Qt::Orientation, Qt::ScrollBarPolicy) {}
-
 /*!
     \internal
@@ -472 +488 @@
 {
     Q_D(QAbstractScrollArea);
-    d->init();
+    QT_TRY {
+        d->init();
+    } QT_CATCH(...) {
+        d->viewportFilter.reset();
+        QT_RETHROW;
+    }
 }
 
@@ -484 +505 @@
 {
     Q_D(QAbstractScrollArea);
-    d->init();
+    QT_TRY {
+        d->init();
+    } QT_CATCH(...) {
+        d->viewportFilter.reset();
+        QT_RETHROW;
+    }
 }
 
@@ -494 +520 @@
 {
     Q_D(QAbstractScrollArea);
-    delete d->viewportFilter;
+    // reset it here, otherwise we'll have a dangling pointer in ~QWidget
+    d->viewportFilter.reset();
 }
 
@@ -518 +545 @@
         d->viewport->setParent(this);
         d->viewport->setFocusProxy(this);
-        d->viewport->installEventFilter(d->viewportFilter);
+        d->viewport->installEventFilter(d->viewportFilter.data());
+#ifndef Q_WS_MAC
+        d->viewport->grabGesture(Qt::PanGesture);
+#endif
         d->layoutChildren();
         if (isVisible())
@@ -841 +871 @@
     d->bottom = bottom;
     d->layoutChildren();
+}
+
+/*!
+    \since 4.6
+    Sets \a margins around the scrolling area. This is useful for
+    applications such as spreadsheets with "locked" rows and columns.
+    The marginal space is is left blank; put widgets in the unused
+    area.
+
+    By default all margins are zero.
+
+*/
+void QAbstractScrollArea::setViewportMargins(const QMargins &margins)
+{
+    setViewportMargins(margins.left(), margins.top(),
+                       margins.right(), margins.bottom());
 }
 
@@ -874 +920 @@
             d->layoutChildren();
             break;
-    case QEvent::Paint:
+    case QEvent::Paint: {
+        QStyleOption option;
+        option.initFrom(this);
         if (d->cornerPaintingRect.isValid()) {
-            QStyleOption option;
             option.rect = d->cornerPaintingRect;
             QPainter p(this);
@@ -883 +930 @@
 #ifdef Q_WS_MAC
         if (d->reverseCornerPaintingRect.isValid()) {
-            QStyleOption option;
             option.rect = d->reverseCornerPaintingRect;
             QPainter p(this);
@@ -889 +935 @@
         }
 #endif
+        }
         QFrame::paintEvent((QPaintEvent*)e);
         break;
@@ -909 +956 @@
     case QEvent::DragLeave:
 #endif
+        // ignore touch events in case they have been propagated from the viewport
+    case QEvent::TouchBegin:
+    case QEvent::TouchUpdate:
+    case QEvent::TouchEnd:
         return false;
+    case QEvent::Gesture:
+    {
+        QGestureEvent *ge = static_cast<QGestureEvent *>(e);
+        QPanGesture *g = static_cast<QPanGesture *>(ge->gesture(Qt::PanGesture));
+        if (g) {
+            QScrollBar *hBar = horizontalScrollBar();
+            QScrollBar *vBar = verticalScrollBar();
+            QPointF delta = g->delta();
+            if (!delta.isNull()) {
+                if (QApplication::isRightToLeft())
+                    delta.rx() *= -1;
+                int newX = hBar->value() - delta.x();
+                int newY = vBar->value() - delta.y();
+                hBar->setValue(newX);
+                vBar->setValue(newY);
+            }
+            return true;
+        }
+        return false;
+    }
     case QEvent::StyleChange:
     case QEvent::LayoutDirectionChange:
@@ -949 +1020 @@
     case QEvent::MouseButtonRelease:
     case QEvent::MouseButtonDblClick:
+    case QEvent::TouchBegin:
+    case QEvent::TouchUpdate:
+    case QEvent::TouchEnd:
     case QEvent::MouseMove:
     case QEvent::ContextMenu:
@@ -962 +1036 @@
         return QFrame::event(e);
     case QEvent::LayoutRequest:
+    case QEvent::Gesture:
+    case QEvent::GestureOverride:
         return event(e);
     default:
@@ -1059 +1135 @@
 {
     Q_D(QAbstractScrollArea);
-    if (static_cast<QWheelEvent*>(e)->orientation() == Qt::Horizontal)
-        QApplication::sendEvent(d->hbar, e);
-    else
-        QApplication::sendEvent(d->vbar, e);
+    QScrollBar *const bars[2] = { d->hbar, d->vbar };
+    int idx = (e->orientation() == Qt::Vertical) ? 1 : 0;
+    int other = (idx + 1) % 2;
+    if (!bars[idx]->isVisible() && bars[other]->isVisible())
+        idx = other;   // If the scrollbar of the event orientation is hidden, fallback to the other.
+
+    QApplication::sendEvent(bars[idx], e);
 }
 #endif
@@ -1238 +1317 @@
 {
     layoutChildren();
+#ifdef Q_WS_WIN
+    // Need to re-subscribe to gestures as the content changes to make sure we
+    // enable/disable panning when needed.
+    QWidgetPrivate *dd = static_cast<QWidgetPrivate *>(QObjectPrivate::get(viewport));
+    if (dd)
+        dd->winSetupGestures();
+#endif // Q_WS_WIN
 }
 
@@ -1265 +1351 @@
     int vsbExt = d->vbar->sizeHint().width();
     int extra = 2 * d->frameWidth;
+    QStyleOption opt;
+    opt.initFrom(this);
+    if ((d->frameStyle != QFrame::NoFrame)
+        && style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents, &opt, this)) {
+        extra += style()->pixelMetric(QStyle::PM_ScrollView_ScrollBarSpacing, &opt, this);
+    }
     return QSize(d->scrollBarContainers[Qt::Horizontal]->sizeHint().width() + vsbExt + extra,
                  d->scrollBarContainers[Qt::Vertical]->sizeHint().height() + hsbExt + extra);