From 660a32cfcf9bd9aee882ee3fb84045e8a49e4f97 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <kb9vqf@pearsoncomputing.net>
Date: Tue, 31 Jan 2012 22:55:00 +0000
Subject: Add full hidden item support to QIconView

This will enable TDE to efficiently filter icon views via Konqueror
---
diff --git a/src/iconview/qiconview.cpp b/src/iconview/qiconview.cpp
index c1ea8cc..dd74e29 100644
--- a/src/iconview/qiconview.cpp
+++ b/src/iconview/qiconview.cpp
@@ -1137,6 +1137,9 @@ void QIconViewItem::setKey( const QString &k )
 
 void QIconViewItem::setPixmap( const QPixmap &icon )
 {
+    if (isVisible() == FALSE)
+	return;
+
     if ( itemIcon && itemIcon == unknown_icon )
 	itemIcon = 0;
 
@@ -1235,6 +1238,9 @@ void QIconViewItem::setText( const QString &text, bool recalc, bool redraw )
 
 void QIconViewItem::setPixmap( const QPixmap &icon, bool recalc, bool redraw )
 {
+    if (isVisible() == FALSE)
+	return;
+
     if ( itemIcon && itemIcon == unknown_icon )
 	itemIcon = 0;
 
@@ -3008,7 +3014,7 @@ void QIconView::insertItem( QIconViewItem *item, QIconViewItem *after )
 	    //insertInGrid( item );
 
 	    d->cachedW = QMAX( d->cachedW, item->x() + item->width() );
-	    d->cachedH= QMAX( d->cachedH, item->y() + item->height() );
+	    d->cachedH = QMAX( d->cachedH, item->y() + item->height() );
 
 	    d->updateTimer->start( 0, TRUE );
 	} else {
@@ -3587,6 +3593,9 @@ void QIconView::arrangeItemsInGrid( bool update )
     int w = 0, h = 0, y = d->spacing;
 
     QIconViewItem *item = d->firstItem;
+    while (item && (item->isVisible() == FALSE)) {
+	item = item->next;
+    }
     bool changedLayout = FALSE;
     while ( item ) {
 	bool changed;
@@ -3604,21 +3613,37 @@ void QIconView::arrangeItemsInGrid( bool update )
 	    break;
 
 	item = item->next;
+	while (item && (item->isVisible() == FALSE)) {
+	    item = item->next;
+	}
     }
 
     if ( d->lastItem && d->arrangement == TopToBottom ) {
 	item = d->lastItem;
-	int x = item->x();
+	while (item && (item->isVisible() == FALSE)) {
+	    item = item->prev;
+	}
+	int x = 0;
+	if (item)
+	    x = item->x();
 	while ( item && item->x() >= x ) {
 	    w = QMAX( w, item->x() + item->width() );
 	    h = QMAX( h, item->y() + item->height() );
 	    item = item->prev;
+	    while (item && (item->isVisible() == FALSE)) {
+		item = item->prev;
+	    }
 	}
     }
     d->containerUpdateLocked = FALSE;
 
-    w = QMAX( QMAX( d->cachedW, w ), d->lastItem->x() + d->lastItem->width() );
-    h = QMAX( QMAX( d->cachedH, h ), d->lastItem->y() + d->lastItem->height() );
+    QIconViewItem *lastVisibleItem = d->lastItem;
+    while (lastVisibleItem->prev && (lastVisibleItem->isVisible() == FALSE)) {
+	lastVisibleItem = lastVisibleItem->prev;
+    }
+
+    w = QMAX( QMAX( d->cachedW, w ), lastVisibleItem->x() + lastVisibleItem->width() );
+    h = QMAX( QMAX( d->cachedH, h ), lastVisibleItem->y() + lastVisibleItem->height() );
 
     if ( d->arrangement == TopToBottom )
 	w += d->spacing;
@@ -3977,8 +4002,8 @@ void QIconView::ensureItemVisible( QIconViewItem *item )
     if ( !item )
 	return;
 
-    if ( d->updateTimer && d->updateTimer->isActive() ||
-	 d->fullRedrawTimer && d->fullRedrawTimer->isActive() )
+    if ( (d->updateTimer && d->updateTimer->isActive()) ||
+	 (d->fullRedrawTimer && d->fullRedrawTimer->isActive()) )
 	slotUpdate();
 
     int w = item->width();
@@ -5793,6 +5818,15 @@ QIconViewItem *QIconView::makeRowLayout( QIconViewItem *begin, int &y, bool &cha
 {
     QIconViewItem *end = 0;
 
+    // Find the first visible item
+    while (begin->next && (begin->isVisible() == FALSE)) {
+	begin = begin->next;
+    }
+    if (!begin->next) {
+	changed = TRUE;
+	return begin;
+    }
+
     bool reverse = QApplication::reverseLayout();
     changed = FALSE;
 
@@ -5808,12 +5842,18 @@ QIconViewItem *QIconView::makeRowLayout( QIconViewItem *begin, int &y, bool &cha
 		x += d->spacing + item->width();
 		if ( x > visibleWidth() && item != begin ) {
 		    item = item->prev;
+		    while (item && (item->isVisible() == FALSE)) {
+			item = item->prev;
+		    }
 		    break;
 		}
 		h = QMAX( h, item->height() );
 		ih = QMAX( ih, item->pixmapRect().height() );
 		QIconViewItem *old = item;
 		item = item->next;
+		while (item && (item->isVisible() == FALSE)) {
+		    item = item->next;
+		}
 		if ( !item ) {
 		    item = old;
 		    break;
@@ -5869,12 +5909,18 @@ QIconViewItem *QIconView::makeRowLayout( QIconViewItem *begin, int &y, bool &cha
 		}
 		if ( x > visibleWidth() && item != begin ) {
 		    item = item->prev;
+		    while (item && (item->isVisible() == FALSE)) {
+			item = item->prev;
+		    }
 		    break;
 		}
 		h = QMAX( h, item->height() );
 		ih = QMAX( ih, item->pixmapRect().height() );
 		QIconViewItem *old = item;
 		item = item->next;
+		while (item && (item->isVisible() == FALSE)) {
+		    item = item->next;
+		}
 		if ( !item ) {
 		    item = old;
 		    break;
@@ -5915,6 +5961,9 @@ QIconViewItem *QIconView::makeRowLayout( QIconViewItem *begin, int &y, bool &cha
 		if ( item == end )
 		    break;
 		item = item->next;
+		while (item && (item->isVisible() == FALSE)) {
+		    item = item->next;
+		}
 	    }
 	    y += h + d->spacing;
 	}
@@ -5932,11 +5981,17 @@ QIconViewItem *QIconView::makeRowLayout( QIconViewItem *begin, int &y, bool &cha
 		y += d->spacing + item->height();
 		if ( y > visibleHeight() && item != begin ) {
 		    item = item->prev;
+		    while (item && (item->isVisible() == FALSE)) {
+			item = item->prev;
+		    }
 		    break;
 		}
 		w = QMAX( w, item->width() );
 		QIconViewItem *old = item;
 		item = item->next;
+		while (item && (item->isVisible() == FALSE)) {
+		    item = item->next;
+		}
 		if ( !item ) {
 		    item = old;
 		    break;
@@ -5966,6 +6021,9 @@ QIconViewItem *QIconView::makeRowLayout( QIconViewItem *begin, int &y, bool &cha
 		if ( item == end )
 		    break;
 		item = item->next;
+		while (item && (item->isVisible() == FALSE)) {
+		    item = item->next;
+		}
 	    }
 	    x += w + d->spacing;
 	}
@@ -6279,6 +6337,10 @@ void QIconView::rebuildContainers()
 		}
 	    }
 	}
+	else {
+	    // Skip this hidden item
+	    item = item->next;
+	}
     }
 }
 
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