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tde-packaging
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tde-packaging/opensuse/tdelibs/smooth-scrolling.diff

268 lines
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Index: khtml/khtmlview.cpp
===================================================================
--- khtml/khtmlview.cpp.orig
+++ khtml/khtmlview.cpp
@@ -151,6 +151,9 @@ public:
KHTMLViewPrivate()
: underMouse( 0 ), underMouseNonShared( 0 ), visibleWidgets( 107 )
+#ifndef NO_SMOOTH_SCROLL_HACK
+ , dx(0), dy(0), ddx(0), ddy(0), rdx(0), rdy(0), scrolling(false)
+#endif
{
#ifndef KHTML_NO_CARET
m_caretViewContext = 0;
@@ -396,6 +399,17 @@ public:
short m_mouseScroll_byY;
QTimer *m_mouseScrollTimer;
QWidget *m_mouseScrollIndicator;
+#ifndef NO_SMOOTH_SCROLL_HACK
+ QTimer timer2;
+ int dx;
+ int dy;
+ // Step size * 16 and residual to avoid huge difference between 1px/step and 2px/step
+ int ddx;
+ int ddy;
+ int rdx;
+ int rdy;
+ bool scrolling;
+#endif
};
#ifndef QT_NO_TOOLTIP
@@ -504,6 +518,11 @@ KHTMLView::KHTMLView( KHTMLPart *part, Q
init();
viewport()->show();
+#ifndef NO_SMOOTH_SCROLL_HACK
+#define timer timer2
+ connect(&d->timer, SIGNAL(timeout()), this, SLOT(scrollTick()));
+#undef timer
+#endif
}
KHTMLView::~KHTMLView()
@@ -1544,7 +1563,7 @@ void KHTMLView::keyPressEvent( QKeyEvent
case Key_Down:
case Key_J:
if (!d->scrollTimerId || d->scrollSuspended)
- scrollBy( 0, 10 );
+ scrollBy( 0, 10 * _ke->count() );
if (d->scrollTimerId)
d->newScrollTimer(this, 0);
break;
@@ -1559,7 +1578,7 @@ void KHTMLView::keyPressEvent( QKeyEvent
case Key_Up:
case Key_K:
if (!d->scrollTimerId || d->scrollSuspended)
- scrollBy( 0, -10 );
+ scrollBy( 0, -10 * _ke->count());
if (d->scrollTimerId)
d->newScrollTimer(this, 0);
break;
@@ -1572,14 +1591,14 @@ void KHTMLView::keyPressEvent( QKeyEvent
case Key_Right:
case Key_L:
if (!d->scrollTimerId || d->scrollSuspended)
- scrollBy( 10, 0 );
+ scrollBy( 10 * _ke->count(), 0 );
if (d->scrollTimerId)
d->newScrollTimer(this, 0);
break;
case Key_Left:
case Key_H:
if (!d->scrollTimerId || d->scrollSuspended)
- scrollBy( -10, 0 );
+ scrollBy( -10 * _ke->count(), 0 );
if (d->scrollTimerId)
d->newScrollTimer(this, 0);
break;
@@ -1712,8 +1731,16 @@ void KHTMLView::keyReleaseEvent(QKeyEven
d->scrollSuspendPreActivate = false;
if( _ke->key() == Key_Shift && d->scrollSuspendPreActivate && _ke->state() == Qt::ShiftButton
&& !(KApplication::keyboardMouseState() & Qt::ShiftButton))
+ {
if (d->scrollTimerId)
- d->scrollSuspended = !d->scrollSuspended;
+ {
+ d->scrollSuspended = !d->scrollSuspended;
+#ifndef NO_SMOOTH_SCROLL_HACK
+ if( d->scrollSuspended )
+ stopScrolling();
+#endif
+ }
+ }
if (d->accessKeysEnabled)
{
@@ -3259,7 +3286,11 @@ void KHTMLView::viewportWheelEvent(QWhee
else
{
d->scrollBarMoved = true;
+#ifndef NO_SMOOTH_SCROLL_HACK
+ scrollViewWheelEvent( e );
+#else
QScrollView::viewportWheelEvent( e );
+#endif
QMouseEvent *tempEvent = new QMouseEvent( QEvent::MouseMove, QPoint(-1,-1), QPoint(-1,-1), Qt::NoButton, e->state() );
emit viewportMouseMoveEvent ( tempEvent );
@@ -4462,4 +4493,117 @@ void KHTMLView::moveCaretToLineEnd()
#endif // KHTML_NO_CARET
+#ifndef NO_SMOOTH_SCROLL_HACK
+#define timer timer2
+
+// All scrolls must be completed within 240ms of last keypress
+static const int SCROLL_TIME = 240;
+// Each step is 20 ms == 50 frames/second
+static const int SCROLL_TICK = 20;
+
+void KHTMLView::scrollBy(int dx, int dy)
+{
+ KConfigGroup cfg( KGlobal::config(), "KDE" );
+ if( !cfg.readBoolEntry( "SmoothScrolling", true )) {
+ QScrollView::scrollBy( dx, dy );
+ return;
+ }
+ // scrolling destination
+ int full_dx = d->dx + dx;
+ int full_dy = d->dy + dy;
+
+ // scrolling speed
+ int ddx = 0;
+ int ddy = 0;
+
+ int steps = SCROLL_TIME/SCROLL_TICK;
+
+ ddx = (full_dx*16)/steps;
+ ddy = (full_dy*16)/steps;
+
+ // don't go under 1px/step
+ if (ddx > 0 && ddx < 16) ddx = 16;
+ if (ddy > 0 && ddy < 16) ddy = 16;
+ if (ddx < 0 && ddx > -16) ddx = -16;
+ if (ddy < 0 && ddy > -16) ddy = -16;
+
+ d->dx = full_dx;
+ d->dy = full_dy;
+ d->ddx = ddx;
+ d->ddy = ddy;
+
+ if (!d->scrolling) {
+ scrollTick();
+ startScrolling();
+ }
+}
+
+void KHTMLView::scrollTick() {
+ if (d->dx == 0 && d->dy == 0) {
+ stopScrolling();
+ return;
+ }
+
+ int tddx = d->ddx + d->rdx;
+ int tddy = d->ddy + d->rdy;
+
+ int ddx = tddx / 16;
+ int ddy = tddy / 16;
+ d->rdx = tddx % 16;
+ d->rdy = tddy % 16;
+
+ if (d->dx > 0 && ddx > d->dx) ddx = d->dx;
+ else
+ if (d->dx < 0 && ddx < d->dx) ddx = d->dx;
+
+ if (d->dy > 0 && ddy > d->dy) ddy = d->dy;
+ else
+ if (d->dy < 0 && ddy < d->dy) ddy = d->dy;
+
+ d->dx -= ddx;
+ d->dy -= ddy;
+
+// QScrollView::setContentsPos( contentsX() + ddx, contentsY() + ddy);
+ kapp->syncX();
+ QScrollView::scrollBy(ddx, ddy);
+// Unaccelerated X can get seriously overloaded by scrolling and for some reason
+// will send KeyPress events only infrequently. This should help to reduce
+// the load.
+ kapp->syncX();
+}
+
+void KHTMLView::startScrolling()
+{
+ d->scrolling = true;
+ d->timer.start(SCROLL_TICK, false);
+}
+
+void KHTMLView::stopScrolling()
+{
+ d->timer.stop();
+ d->dx = d->dy = 0;
+ d->scrolling = false;
+}
+
+// Overloaded from QScrollView and QScrollBar
+void KHTMLView::scrollViewWheelEvent( QWheelEvent *e )
+{
+ int pageStep = verticalScrollBar()->pageStep();
+ int lineStep = verticalScrollBar()->lineStep();
+ int step = QMIN( QApplication::wheelScrollLines()*lineStep, pageStep );
+ if ( ( e->state() & ControlButton ) || ( e->state() & ShiftButton ) )
+ step = pageStep;
+
+ if(e->orientation() == Horizontal)
+ scrollBy(-((e->delta()*step)/120), 0);
+ else if(e->orientation() == Vertical)
+ scrollBy(0,-((e->delta()*step)/120));
+
+ e->accept();
+}
+
+#undef timer
+
+#endif // NO_SMOOTH_SCROLL_HACK
+
#undef DEBUG_CARETMODE
Index: khtml/khtmlview.h
===================================================================
--- khtml/khtmlview.h.orig
+++ khtml/khtmlview.h
@@ -181,6 +181,11 @@ signals:
void hideAccessKeys();
void repaintAccessKeys();
void findAheadActive( bool );
+//#define NO_SMOOTH_SCROLL_HACK
+#ifndef NO_SMOOTH_SCROLL_HACK
+public slots:
+ void scrollBy(int dx, int dy);
+#endif
protected:
void clear();
@@ -211,9 +216,23 @@ protected:
void contentsContextMenuEvent ( QContextMenuEvent *_ce );
void doAutoScroll();
void timerEvent ( QTimerEvent * );
+
+#ifndef NO_SMOOTH_SCROLL_HACK
+ void startScrolling();
+ void stopScrolling();
+#ifndef QT_NO_WHEELEVENT
+ void scrollViewWheelEvent( QWheelEvent* e );
+#endif
+#endif
+
protected slots:
void slotPaletteChanged();
void slotScrollBarMoved();
+#ifndef NO_SMOOTH_SCROLL_HACK
+ void scrollTick();
+#else
+ void scrollTick() {}; // moc cannot handle #if
+#endif
private slots:
void tripleClickTimeout();
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