From d82327fe4f56dcffc27a6af162cbed23adf83d8d Mon Sep 17 00:00:00 2001
From: Timothy Pearson <kb9vqf@pearsoncomputing.net>
Date: Fri, 5 Aug 2011 00:23:35 -0500
Subject: [ENHANCEMENT] Add skeleton of setVisible()/isVisible() support to
 QIconView

---
 src/iconview/qiconview.cpp | 133 +++++++++++++++++++++++++++++----------------
 src/iconview/qiconview.h   |   4 ++
 2 files changed, 90 insertions(+), 47 deletions(-)

diff --git a/src/iconview/qiconview.cpp b/src/iconview/qiconview.cpp
index 04585b7..c1ea8cc 100644
--- a/src/iconview/qiconview.cpp
+++ b/src/iconview/qiconview.cpp
@@ -995,6 +995,7 @@ void QIconViewItem::init( QIconViewItem *after
     allow_rename = FALSE;
     allow_drag = TRUE;
     allow_drop = TRUE;
+    visible = TRUE;
     selected = FALSE;
     selectable = TRUE;
 #ifndef QT_NO_TEXTEDIT
@@ -1050,6 +1051,32 @@ int QIconViewItem::rtti() const
     return RTTI;
 }
 
+/*!
+    If \a b is TRUE, the item is made visible; otherwise it is hidden.
+*/
+
+void QIconViewItem::setVisible( bool b )
+{
+    if ( b == (bool)visible )
+	return;
+    QIconView *iv = iconView();
+    if ( !iv )
+	return;
+    visible = b;
+    if ( iv )
+	iv->updateContents();
+}
+
+/*!
+    Returns TRUE if the item is visible; otherwise returns FALSE.
+
+    \sa setVisible()
+*/
+
+bool QIconViewItem::isVisible() const
+{
+    return (bool)visible;
+}
 
 /*!
     Sets \a text as the text of the icon view item. This function
@@ -3851,10 +3878,18 @@ void QIconView::selectAll( bool select )
     viewport()->setUpdatesEnabled( FALSE );
     QRect rr;
     for ( ; item; item = item->next ) {
-	if ( select != item->isSelected() ) {
- 	    item->setSelected( select, TRUE );
-	    rr = rr.unite( item->rect() );
-	    changed = TRUE;
+        if (item->isVisible()) {
+	    if ( select != item->isSelected() ) {
+	        item->setSelected( select, TRUE );
+	        rr = rr.unite( item->rect() );
+	        changed = TRUE;
+	    }
+	    else {
+	        if ( FALSE != item->isSelected() ) {
+	            item->setSelected( FALSE, TRUE );
+	            changed = TRUE;
+	        }
+	    }
 	}
     }
     viewport()->setUpdatesEnabled( ue );
@@ -4082,7 +4117,7 @@ void QIconView::clear()
     d->drawDragShapes = FALSE;
 
     resizeContents( 0, 0 );
-    // maybe we don´t need this update, so delay it
+    // maybe we don�t need this update, so delay it
     d->fullRedrawTimer->start( 0, TRUE );
 
     d->cleared = TRUE;
@@ -6139,17 +6174,19 @@ void QIconView::updateItemContainer( QIconViewItem *item )
 	return;
     }
 
-    c->items.append( item );
-    item->d->container1 = c;
+    if (item->isVisible()) {
+        c->items.append( item );
+        item->d->container1 = c;
 
-    if ( !contains ) {
-	c = c->n;
-	if ( !c ) {
-	    appendItemContainer();
-	    c = d->lastContainer;
-	}
-	c->items.append( item );
-	item->d->container2 = c;
+        if ( !contains ) {
+	    c = c->n;
+	    if ( !c ) {
+	        appendItemContainer();
+	        c = d->lastContainer;
+	    }
+	    c->items.append( item );
+	    item->d->container2 = c;
+        }
     }
     if ( contentsWidth() < irect.right() || contentsHeight() < irect.bottom() )
 	resizeContents( QMAX( contentsWidth(), irect.right() ), QMAX( contentsHeight(), irect.bottom() ) );
@@ -6204,40 +6241,42 @@ void QIconView::rebuildContainers()
     appendItemContainer();
     c = d->lastContainer;
     while ( item ) {
-	if ( c->rect.contains( item->rect() ) ) {
-	    item->d->container1 = c;
-	    item->d->container2 = 0;
-	    c->items.append( item );
-	    item = item->next;
-	} else if ( c->rect.intersects( item->rect() ) ) {
-	    item->d->container1 = c;
-	    c->items.append( item );
-	    c = c->n;
-	    if ( !c ) {
-		appendItemContainer();
-		c = d->lastContainer;
-	    }
-	    c->items.append( item );
-	    item->d->container2 = c;
-	    item = item->next;
-	    c = c->p;
-	} else {
-	    if ( d->arrangement == LeftToRight ) {
-		if ( item->y() < c->rect.y() && c->p ) {
-		    c = c->p;
-		    continue;
-		}
+        if (item->isVisible()) {
+	    if ( c->rect.contains( item->rect() ) ) {
+	        item->d->container1 = c;
+	        item->d->container2 = 0;
+	        c->items.append( item );
+	        item = item->next;
+	    } else if ( c->rect.intersects( item->rect() ) ) {
+	        item->d->container1 = c;
+	        c->items.append( item );
+	        c = c->n;
+	        if ( !c ) {
+		    appendItemContainer();
+		    c = d->lastContainer;
+	        }
+	        c->items.append( item );
+	        item->d->container2 = c;
+	        item = item->next;
+	        c = c->p;
 	    } else {
-		if ( item->x() < c->rect.x() && c->p ) {
-		    c = c->p;
-		    continue;
-		}
-	    }
+	        if ( d->arrangement == LeftToRight ) {
+		    if ( item->y() < c->rect.y() && c->p ) {
+		        c = c->p;
+		        continue;
+		    }
+	        } else {
+		    if ( item->x() < c->rect.x() && c->p ) {
+		        c = c->p;
+		        continue;
+		    }
+	        }
 
-	    c = c->n;
-	    if ( !c ) {
-		appendItemContainer();
-		c = d->lastContainer;
+	        c = c->n;
+	        if ( !c ) {
+		    appendItemContainer();
+		    c = d->lastContainer;
+		}
 	    }
 	}
     }
diff --git a/src/iconview/qiconview.h b/src/iconview/qiconview.h
index 2da3ed0..97780d8 100644
--- a/src/iconview/qiconview.h
+++ b/src/iconview/qiconview.h
@@ -169,6 +169,9 @@ public:
     bool isSelected() const;
     bool isSelectable() const;
 
+    void setVisible( bool b );
+    bool isVisible() const;
+
     virtual void repaint();
 
     virtual bool move( int x, int y );
@@ -249,6 +252,7 @@ private:
     uint allow_rename : 1;
     uint allow_drag : 1;
     uint allow_drop : 1;
+    uint visible : 1;
     uint selected : 1;
     uint selectable : 1;
     uint dirty : 1;
-- 
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