From cff522f98666e1bf24c36a3a0a2abe3fb2e1abe8 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <kb9vqf@pearsoncomputing.net>
Date: Mon, 18 Feb 2013 20:37:37 -0600
Subject: [PATCH] Automated update from Qt3

---
 src/iconview/ntqiconview.h   |  1 +
 src/iconview/qiconview.cpp   | 47 +++++++++++++++++++++++++++++++++++-
 src/kernel/qapplication.cpp  |  2 +-
 src/kernel/qprocess_unix.cpp |  2 +-
 4 files changed, 49 insertions(+), 3 deletions(-)

diff --git a/src/iconview/ntqiconview.h b/src/iconview/ntqiconview.h
index bda8273f..e45cfca6 100644
--- a/src/iconview/ntqiconview.h
+++ b/src/iconview/ntqiconview.h
@@ -452,6 +452,7 @@ protected:
     void contentsDropEvent( TQDropEvent *e );
 #endif
 
+    void bufferedPaintEvent( TQPaintEvent* );
     void resizeEvent( TQResizeEvent* e );
     void keyPressEvent( TQKeyEvent *e );
     void focusInEvent( TQFocusEvent *e );
diff --git a/src/iconview/qiconview.cpp b/src/iconview/qiconview.cpp
index ee4a0fe3..dbf764a0 100644
--- a/src/iconview/qiconview.cpp
+++ b/src/iconview/qiconview.cpp
@@ -214,6 +214,7 @@ public:
     TQIconViewItem *currentItem, *tmpCurrentItem, *highlightedItem,
 	*startDragItem, *pressedItem, *selectAnchor, *renamingItem;
     TQRect *rubber;
+    TQPixmap *backBuffer;
     TQTimer *scrollTimer, *adjustTimer, *updateTimer, *inputTimer,
 	*fullRedrawTimer;
     int rastX, rastY, spacing;
@@ -2800,6 +2801,7 @@ TQIconView::TQIconView( TQWidget *parent, const char *name, WFlags f )
     d->currentItem = 0;
     d->highlightedItem = 0;
     d->rubber = 0;
+    d->backBuffer = 0;
     d->scrollTimer = 0;
     d->startDragItem = 0;
     d->tmpCurrentItem = 0;
@@ -2953,6 +2955,8 @@ TQIconView::~TQIconView()
 	delete item;
 	item = tmp;
     }
+    delete d->backBuffer;
+    d->backBuffer = 0;
     delete d->fm;
     d->fm = 0;
 #ifndef QT_NO_TOOLTIP
@@ -4972,6 +4976,47 @@ void TQIconView::contentsDropEvent( TQDropEvent *e )
 }
 #endif
 
+/*!
+    This function grabs all paintevents that otherwise would have been
+    processed by the TQScrollView::viewportPaintEvent(). Here we use a
+    doublebuffer to reduce 'on-paint' flickering on TQIconView
+    (and of course its children).
+    
+    \sa TQScrollView::viewportPaintEvent(), TQIconView::drawContents()
+*/
+
+void TQIconView::bufferedPaintEvent( TQPaintEvent* pe )
+{
+    TQWidget* vp = viewport();
+    TQRect r = pe->rect() & vp->rect();
+    int ex = r.x() + contentsX();
+    int ey = r.y() + contentsY();
+    int ew = r.width();
+    int eh = r.height();
+
+    if ( !d->backBuffer )
+	d->backBuffer = new TQPixmap(vp->size());
+    if ( d->backBuffer->size() != vp->size() ) {
+	// Resize function (with hysteresis). Uses a good compromise between memory
+	// consumption and speed (number) of resizes.
+	float newWidth = (float)vp->width();
+	float newHeight = (float)vp->height();
+	if ( newWidth > d->backBuffer->width() || newHeight > d->backBuffer->height() )
+	{
+	    newWidth *= 1.1892;
+	    newHeight *= 1.1892;
+	    d->backBuffer->resize( (int)newWidth, (int)newHeight );
+	} else if ( 1.5*newWidth < d->backBuffer->width() || 1.5*newHeight < d->backBuffer->height() )
+	    d->backBuffer->resize( (int)newWidth, (int)newHeight );
+    }
+
+    TQPainter p;
+    p.begin(d->backBuffer, vp);
+    drawContentsOffset(&p, contentsX(), contentsY(), ex, ey, ew, eh);
+    p.end();
+    bitBlt(vp, r.x(), r.y(), d->backBuffer, r.x(), r.y(), ew, eh);
+}
+
 /*!
     \reimp
 */
@@ -5756,7 +5801,7 @@ bool TQIconView::eventFilter( TQObject * o, TQEvent * e )
 		    if ( !d->rubber )
 			drawDragShapes( d->oldDragPos );
 		}
-		viewportPaintEvent( (TQPaintEvent*)e );
+		bufferedPaintEvent( (TQPaintEvent*)e );
 		if ( d->dragging ) {
 		    if ( !d->rubber )
 			drawDragShapes( d->oldDragPos );
diff --git a/src/kernel/qapplication.cpp b/src/kernel/qapplication.cpp
index 7aefd35b..76b26592 100644
--- a/src/kernel/qapplication.cpp
+++ b/src/kernel/qapplication.cpp
@@ -545,7 +545,7 @@ public:
         TQThreadInstance::setCurrentThread(this);
 
         // thread should be running and not finished for the lifetime
-        // of the application (even if QCoreApplication goes away)
+        // of the application (even if TQCoreApplication goes away)
         d->running = true;
         d->finished = false;
         d->eventLoop = NULL;
diff --git a/src/kernel/qprocess_unix.cpp b/src/kernel/qprocess_unix.cpp
index a1867247..39027459 100644
--- a/src/kernel/qprocess_unix.cpp
+++ b/src/kernel/qprocess_unix.cpp
@@ -1135,7 +1135,7 @@ bool TQProcess::canReadLineStderr() const
     This function always returns immediately. The data you
     pass to writeToStdin() is copied into an internal memory buffer in
     TQProcess, and when control goes back to the event loop, TQProcess will
-    starting transferring data from this buffer to the running process. �
+    starting transferring data from this buffer to the running process.  
     Sometimes the data will be transferred in several payloads, depending on
     how much data is read at a time by the process itself. When TQProcess has
     transferred all the data from its memory buffer to the running process, it