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Code Issues Releases Wiki Activity

Fixed search algorithm for iconview widget. This resolves bug 420.

Browse Source 
Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
pull/2/head
Michele Calgaro 9 years ago
parent 0d96f74958
commit d6867cf92e
3 changed files with 238 additions and 223 deletions
Show Stats Download Patch File Download Diff File

7
doc/html/qiconview-h.html
Unescape View File

@ -522,12 +522,7 @@ private:
DirLeft,
DirRight
};
QIconViewItem* findItem( Direction dir,
const QPoint &amp;relativeTo,
const QRect &amp;searchRect ) const;
bool neighbourItem( Direction dir,
const QPoint &amp;relativeTo,
const QIconViewItem *item ) const;
QIconViewItem* findItem(Direction dir, const QIconViewItem *fromItem) const;
QBitmap mask( QPixmap *pix ) const;
QIconViewPrivate *d;

447
src/widgets/qiconview.cpp
Unescape View File

@ -287,74 +287,8 @@ public:
struct SortableItem {
QIconViewItem *item;
};
public:
/* finds the containers that intersect with \a searchRect in the direction \a dir relative to \a relativeTo */
QPtrList<ItemContainer>* findContainers(
QIconView:: Direction dir,
const QPoint &relativeTo,
const QRect &searchRect ) const;
// friend int cmpIconViewItems( const void *n1, const void *n2 );
};
QPtrList<QIconViewPrivate::ItemContainer>* QIconViewPrivate::findContainers(
QIconView:: Direction dir,
const QPoint &relativeTo,
const QRect &searchRect ) const
{
QPtrList<QIconViewPrivate::ItemContainer>* list =
new QPtrList<QIconViewPrivate::ItemContainer>();
if ( arrangement == QIconView::LeftToRight ) {
if ( dir == QIconView::DirLeft || dir == QIconView::DirRight ) {
ItemContainer *c = firstContainer;
for ( ; c; c = c->n )
if ( c->rect.intersects( searchRect ) )
list->append( c );
} else {
if ( dir == QIconView::DirDown ) {
ItemContainer *c = firstContainer;
for ( ; c; c = c->n )
if ( c->rect.intersects( searchRect ) &&
c->rect.bottom() >= relativeTo.y() )
list->append( c );
} else {
ItemContainer *c = lastContainer;
for ( ; c; c = c->p )
if ( c->rect.intersects( searchRect ) &&
c->rect.top() <= relativeTo.y() )
list->append( c );
}
}
} else {
if ( dir == QIconView::DirUp || dir == QIconView::DirDown ) {
ItemContainer *c = firstContainer;
for ( ; c; c = c->n )
if ( c->rect.intersects( searchRect ) )
list->append( c );
} else {
if ( dir == QIconView::DirRight ) {
ItemContainer *c = firstContainer;
for ( ; c; c = c->n )
if ( c->rect.intersects( searchRect ) &&
c->rect.right() >= relativeTo.x() )
list->append( c );
} else {
ItemContainer *c = lastContainer;
for ( ; c; c = c->p )
if ( c->rect.intersects( searchRect ) &&
c->rect.left() <= relativeTo.x() )
list->append( c );
}
}
}
return list;
}
#if defined(Q_C_CALLBACKS)
extern "C" {
#endif
@ -5106,6 +5040,7 @@ void QIconView::keyPressEvent( QKeyEvent *e )
}
} break;
#endif
case Key_Home: {
d->currInputString = QString::null;
if ( !d->firstItem )
@ -5150,6 +5085,7 @@ void QIconView::keyPressEvent( QKeyEvent *e )
e->state() & ControlButton, TRUE );
}
} break;
case Key_End: {
d->currInputString = QString::null;
if ( !d->lastItem )
@ -5193,50 +5129,7 @@ void QIconView::keyPressEvent( QKeyEvent *e )
e->state() & ControlButton, TRUE );
}
} break;
case Key_Right: {
d->currInputString = QString::null;
QIconViewItem *item;
selectCurrent = FALSE;
Direction dir = DirRight;
QRect r( 0, d->currentItem->y(), contentsWidth(), d->currentItem->height() );
item = findItem( dir, d->currentItem->rect().center(), r );
// search the row below from the right
while ( !item && r.y() < contentsHeight() ) {
r.moveBy(0, d->currentItem->height() );
item = findItem( dir, QPoint( 0, r.center().y() ), r );
}
if ( item ) {
QIconViewItem *old = d->currentItem;
setCurrentItem( item );
ensureItemVisible( item );
handleItemChange( old, e->state() & ShiftButton, e->state() & ControlButton );
}
} break;
case Key_Left: {
d->currInputString = QString::null;
QIconViewItem *item;
selectCurrent = FALSE;
Direction dir = DirLeft;
QRect r( 0, d->currentItem->y(), contentsWidth(), d->currentItem->height() );
item = findItem( dir, d->currentItem->rect().center(), r );
// search the row above from the left
while ( !item && r.y() >= 0 ) {
r.moveBy(0, - d->currentItem->height() );
item = findItem( dir, QPoint( contentsWidth(), r.center().y() ), r );
}
if ( item ) {
QIconViewItem *old = d->currentItem;
setCurrentItem( item );
ensureItemVisible( item );
handleItemChange( old, e->state() & ShiftButton, e->state() & ControlButton );
}
} break;
case Key_Space: {
d->currInputString = QString::null;
if ( d->selectionMode == Single)
@ -5244,51 +5137,65 @@ void QIconView::keyPressEvent( QKeyEvent *e )
d->currentItem->setSelected( !d->currentItem->isSelected(), TRUE );
} break;
case Key_Enter: case Key_Return:
case Key_Enter:
case Key_Return:
d->currInputString = QString::null;
emit returnPressed( d->currentItem );
break;
case Key_Right: {
d->currInputString = QString::null;
selectCurrent = FALSE;
Direction dir = DirRight;
QIconViewItem *item = findItem(dir, d->currentItem);
if (item) {
QIconViewItem *old=d->currentItem;
setCurrentItem(item);
ensureItemVisible(item);
handleItemChange(old, e->state() & ShiftButton, e->state() & ControlButton );
}
} break;
case Key_Left: {
d->currInputString = QString::null;
selectCurrent = FALSE;
Direction dir = DirLeft;
QIconViewItem *item = findItem(dir, d->currentItem);
if (item) {
QIconViewItem *old=d->currentItem;
setCurrentItem(item);
ensureItemVisible(item);
handleItemChange(old, e->state() & ShiftButton, e->state() & ControlButton );
}
} break;
case Key_Down: {
d->currInputString = QString::null;
QIconViewItem *item;
selectCurrent = FALSE;
Direction dir = DirDown;
QRect r( d->currentItem->x(), 0, d->currentItem->width(), contentsHeight() );
item = findItem( dir, d->currentItem->rect().center(), r );
// finding the closest item below and to the right
while ( !item && r.x() < contentsWidth() ) {
r.moveBy( r.width() , 0 );
item = findItem( dir, QPoint( r.center().x(), 0 ), r );
}
QIconViewItem *i = d->currentItem;
setCurrentItem( item );
item = i;
handleItemChange( item, e->state() & ShiftButton, e->state() & ControlButton );
QIconViewItem *item = findItem(dir, d->currentItem);
if (item) {
QIconViewItem *old=d->currentItem;
setCurrentItem(item);
ensureItemVisible(item);
handleItemChange(old, e->state() & ShiftButton, e->state() & ControlButton );
}
} break;
case Key_Up: {
d->currInputString = QString::null;
QIconViewItem *item;
selectCurrent = FALSE;
Direction dir = DirUp;
QRect r( d->currentItem->x(), 0, d->currentItem->width(), contentsHeight() );
item = findItem( dir, d->currentItem->rect().center(), r );
// finding the closest item above and to the left
while ( !item && r.x() >= 0 ) {
r.moveBy(- r.width(), 0 );
item = findItem( dir, QPoint(r.center().x(), contentsHeight() ), r );
}
QIconViewItem *i = d->currentItem;
setCurrentItem( item );
item = i;
handleItemChange( item, e->state() & ShiftButton, e->state() & ControlButton );
QIconViewItem *item = findItem(dir, d->currentItem);
if (item) {
QIconViewItem *old=d->currentItem;
setCurrentItem(item);
ensureItemVisible(item);
handleItemChange(old, e->state() & ShiftButton, e->state() & ControlButton );
}
} break;
case Key_Next: {
d->currInputString = QString::null;
selectCurrent = FALSE;
@ -5311,6 +5218,7 @@ void QIconView::keyPressEvent( QKeyEvent *e )
handleItemChange( item, e->state() & ShiftButton, e->state() & ControlButton );
}
} break;
case Key_Prior: {
d->currInputString = QString::null;
selectCurrent = FALSE;
@ -5333,6 +5241,7 @@ void QIconView::keyPressEvent( QKeyEvent *e )
handleItemChange( item, e->state() & ShiftButton, e->state() & ControlButton );
}
} break;
default:
if ( !e->text().isEmpty() && e->text()[ 0 ].isPrint() ) {
selectCurrent = FALSE;
@ -5403,79 +5312,195 @@ void QIconView::keyPressEvent( QKeyEvent *e )
}
/*
Finds the closest item in the Direction \a dir relative from the point \a relativeTo
which intersects with the searchRect.
The function choses the closest item with its center in the searchRect.
Finds the closest item in the direction \a dir starting from the specified \a fromItem.
If the arrangement is LeftToRight (icon view mode): use center as item reference
If the arrangement is TopToBottom (multicolumn view mode): use left top corner as item reference
*/
QIconViewItem* QIconView::findItem( Direction dir,
const QPoint &relativeTo,
const QRect &searchRect ) const
QIconViewItem* QIconView::findItem(Direction dir, const QIconViewItem *fromItem) const
{
QIconViewItem *item;
QIconViewItem *centerMatch = 0;
int centerMatchML = 0;
// gets list of containers with potential items
QPtrList<QIconViewPrivate::ItemContainer>* cList =
d->findContainers( dir, relativeTo, searchRect);
cList->first();
while ( cList->current() && !centerMatch ) {
QPtrList<QIconViewItem> &list = (cList->current())->items;
for ( item = list.first(); item; item = list.next() ) {
if ( neighbourItem( dir, relativeTo, item ) &&
searchRect.contains( item->rect().center() ) &&
item != currentItem() ) {
int ml = (relativeTo - item->rect().center()).manhattanLength();
if ( centerMatch ) {
if ( ml < centerMatchML ) {
centerMatch = item;
centerMatchML = ml;
}
} else {
centerMatch = item;
centerMatchML = ml;
}
}
}
cList->next();
QIconViewItem *closestItem=NULL;
int distPri=0, distSec=0;
int itemDistancePri=0, itemDistanceSec=0;
QPoint pos;
if (d->arrangement == LeftToRight) {
pos=fromItem->rect().center();
}
delete cList;
return centerMatch;
}
/*
Returns TRUE if the items orientation compared to
the point \a relativeTo is correct.
*/
bool QIconView::neighbourItem( Direction dir,
const QPoint &relativeTo,
const QIconViewItem *item ) const
{
switch ( dir ) {
case DirUp:
if ( item->rect().center().y() < relativeTo.y() )
return TRUE;
break;
case DirDown:
if ( item->rect().center().y() > relativeTo.y() )
return TRUE;
break;
case DirLeft:
if ( item->rect().center().x() < relativeTo.x() )
return TRUE;
break;
case DirRight:
if ( item->rect().center().x() > relativeTo.x() )
return TRUE;
break;
default:
// nothing
break;
else {
pos=fromItem->rect().topLeft();
}
return FALSE;
QRect searchRect;
switch (dir) {
case DirDown:
searchRect.setCoords(pos.x(), 0, contentsWidth(), contentsHeight());
break;
case DirUp:
searchRect.setCoords(0, 0, pos.x(), contentsHeight());
break;
case DirRight:
searchRect.setCoords(0, pos.y(), contentsWidth(), contentsHeight());
break;
case DirLeft:
searchRect.setCoords(0, 0, contentsWidth(), pos.y());
break;
}
for (QIconViewPrivate::ItemContainer *c=d->firstContainer; c; c=c->n) {
if (c->rect.intersects(searchRect)) {
QPtrList<QIconViewItem> &list = c->items;
for (QIconViewItem *item=list.first(); item; item=list.next()) {
if (item != fromItem) {
bool itemOK = true;
const QRect &ir = item->rect();
// DirDown/DirUp : primary distance X, secondary distance Y
// DirLeft/DirRight: primary distance Y, secondary distance X
if (d->arrangement == LeftToRight) {
// Left to right arrangement (icon view mode): use center as item reference
switch (dir) {
case DirDown:
if (ir.center().x() > pos.x()) {
distPri = ir.center().x()-pos.x();
distSec = ir.center().y();
}
else if (ir.center().x() == pos.x() && ir.center().y() > pos.y()) {
distPri = 0;
distSec = ir.center().y()-pos.y();
}
else {
itemOK = false;
}
break;
case DirUp:
if (ir.center().x() < pos.x()) {
distPri = pos.x()-ir.center().x();
distSec = contentsHeight()-ir.center().y();
}
else if (ir.center().x() == pos.x() && ir.center().y() < pos.y()) {
distPri = 0;
distSec = pos.y()-ir.center().y();
}
else {
itemOK = false;
}
break;
case DirRight:
if (ir.center().y() > pos.y()) {
distPri = ir.center().y()-pos.y();
distSec = ir.center().x();
}
else if (ir.center().y() == pos.y() && ir.center().x() > pos.x()) {
distPri = 0;
distSec = ir.center().x()-pos.x();
}
else {
itemOK = false;
}
break;
case DirLeft:
if (ir.center().y() < pos.y()) {
distPri = pos.y()-ir.center().y();
distSec = contentsWidth()-ir.center().x();
}
else if (ir.center().y() == pos.y() && ir.center().x() < pos.x()) {
distPri = 0;
distSec = pos.x()-ir.center().x();
}
else {
itemOK = false;
}
break;
default:
itemOK = false;
break;
}
}
else {
// Top to bottom arrangement (multicolumn view mode): use left top corner as item reference
switch (dir) {
case DirDown:
if (ir.left() > pos.x()) {
distPri = ir.left()-pos.x();
distSec = ir.top();
}
else if (ir.left() == pos.x() && ir.top() > pos.y()) {
distPri = 0;
distSec = ir.top()-pos.y();
}
else {
itemOK = false;
}
break;
case DirUp:
if (ir.left() < pos.x()) {
distPri = pos.x()-ir.left();
distSec = contentsHeight()-ir.top();
}
else if (ir.left() == pos.x() && ir.top() < pos.y()) {
distPri = 0;
distSec = pos.y()-ir.top();
}
else {
itemOK = false;
}
break;
case DirRight:
if (ir.top() > pos.y()) {
distPri = ir.top()-pos.y();
distSec = ir.left();
}
else if (ir.top() == pos.y() && ir.left() > pos.x()) {
distPri = 0;
distSec = ir.left()-pos.x();
}
else {
itemOK = false;
}
break;
case DirLeft:
if (ir.top() < pos.y()) {
distPri = pos.y()-ir.top();
distSec = contentsWidth()-ir.left();
}
else if (ir.top() == pos.y() && ir.left() < pos.x()) {
distPri = 0;
distSec = pos.x()-ir.left();
}
else {
itemOK = false;
}
break;
default:
itemOK = false;
break;
}
}
if (itemOK) {
if (!closestItem ||
((distPri < itemDistancePri) ||
(distPri == itemDistancePri && distSec < itemDistanceSec))) {
closestItem = item;
itemDistancePri = distPri;
itemDistanceSec = distSec;
}
}
}
}
}
}
return closestItem;
}
/*!

7
src/widgets/qiconview.h
Unescape View File

@ -491,12 +491,7 @@ private:
DirLeft,
DirRight
};
QIconViewItem* findItem( Direction dir,
const QPoint &relativeTo,
const QRect &searchRect ) const;
bool neighbourItem( Direction dir,
const QPoint &relativeTo,
const QIconViewItem *item ) const;
QIconViewItem* findItem(Direction dir, const QIconViewItem *fromItem) const;
QBitmap mask( QPixmap *pix ) const;
int visibleWidthSB() const;
int visibleHeightSB() const;

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