Fixed (again) search algorithm for iconview widget. This resolves (again) bug 420.r14.0.3r14.0.2

(cherry picked from commit d27f4e2fc304208a404c64279a4e32b1a94b05a9)
Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>

1 files changed, 22 insertions, 24 deletions

diff --git a/src/iconview/qiconview.cpp b/src/iconview/qiconview.cpp
index df9a1be..2eb7b71 100644
--- a/src/iconview/qiconview.cpp
+++ b/src/iconview/qiconview.cpp
@@ -5313,23 +5313,21 @@ void QIconView::keyPressEvent( QKeyEvent *e )
 
 /*
   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
+  If the arrangement is LeftToRight (icon view mode): use (center, top) as item reference
+  If the arrangement is TopToBottom (multicolumn view mode): use (left, top) as item reference
+  This is to allow for smooth scrolling when using the keyboard arrow keys.
 */
 QIconViewItem* QIconView::findItem(Direction dir, const QIconViewItem *fromItem) const
 {
     QIconViewItem *closestItem=NULL;
     int distPri=0, distSec=0;
     int itemDistancePri=0, itemDistanceSec=0;
-    
-    QPoint pos;
+
+    QPoint pos=fromItem->rect().topLeft();
     if (d->arrangement == LeftToRight) {
-      pos=fromItem->rect().center();
-    }
-    else {
-      pos=fromItem->rect().topLeft();
+        pos.setX(fromItem->rect().center().x());
     }
-    
+
     QRect searchRect;
     switch (dir) {
         case DirDown:
@@ -5359,16 +5357,16 @@ QIconViewItem* QIconView::findItem(Direction dir, const QIconViewItem *fromItem)
                     // 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
+                        // Left to right arrangement (icon view mode): use (center, top) as item reference
                         switch (dir) {
                             case DirDown:
                                 if (ir.center().x() > pos.x()) {
                                     distPri = ir.center().x()-pos.x();
-                                    distSec = ir.center().y();
+                                    distSec = ir.top();
                                     }
-                                else if (ir.center().x() == pos.x() && ir.center().y() > pos.y()) {
+                                else if (ir.center().x() == pos.x() && ir.top() > pos.y()) {
                                     distPri = 0;
-                                    distSec = ir.center().y()-pos.y();
+                                    distSec = ir.top()-pos.y();
                                     }
                                 else {
                                     itemOK = false;
@@ -5378,11 +5376,11 @@ QIconViewItem* QIconView::findItem(Direction dir, const QIconViewItem *fromItem)
                             case DirUp:
                                 if (ir.center().x() < pos.x()) {
                                     distPri = pos.x()-ir.center().x();
-                                    distSec = contentsHeight()-ir.center().y();
+                                    distSec = contentsHeight()-ir.top();
                                     }
-                                else if (ir.center().x() == pos.x() && ir.center().y() < pos.y()) {
+                                else if (ir.center().x() == pos.x() && ir.top() < pos.y()) {
                                     distPri = 0;
-                                    distSec = pos.y()-ir.center().y();
+                                    distSec = pos.y()-ir.top();
                                     }
                                 else {
                                     itemOK = false;
@@ -5390,11 +5388,11 @@ QIconViewItem* QIconView::findItem(Direction dir, const QIconViewItem *fromItem)
                                 break;
                             
                             case DirRight:
-                                if (ir.center().y() > pos.y()) {
-                                    distPri = ir.center().y()-pos.y();
+                                if (ir.top() > pos.y()) {
+                                    distPri = ir.top()-pos.y();
                                     distSec = ir.center().x();
                                     }
-                                else if (ir.center().y() == pos.y() && ir.center().x() > pos.x()) {
+                                else if (ir.top() == pos.y() && ir.center().x() > pos.x()) {
                                     distPri = 0;
                                     distSec = ir.center().x()-pos.x();
                                     }
@@ -5404,11 +5402,11 @@ QIconViewItem* QIconView::findItem(Direction dir, const QIconViewItem *fromItem)
                                 break;
                             
                             case DirLeft:
-                                if (ir.center().y() < pos.y()) {
-                                    distPri = pos.y()-ir.center().y();
+                                if (ir.top() < pos.y()) {
+                                    distPri = pos.y()-ir.top();
                                     distSec = contentsWidth()-ir.center().x();
                                     }
-                                else if (ir.center().y() == pos.y() && ir.center().x() < pos.x()) {
+                                else if (ir.top() == pos.y() && ir.center().x() < pos.x()) {
                                     distPri = 0;
                                     distSec = pos.x()-ir.center().x();
                                     }
@@ -5422,8 +5420,8 @@ QIconViewItem* QIconView::findItem(Direction dir, const QIconViewItem *fromItem)
                                 break;
                         }	
                     }
-                    else {            
-                        // Top to bottom arrangement (multicolumn view mode): use left top corner as item reference
+                    else {
+                        // Top to bottom arrangement (multicolumn view mode): use (left, top) as item reference
                         switch (dir) {
                             case DirDown:
                                 if (ir.left() > pos.x()) {