--- /dev/null
+/***************************************************************************
+ * Copyright (C) 2008 by <haraldhv (at) stud.ntnu.no> *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
+ ***************************************************************************/
+
+#include <KGlobalSettings>
+
+#include <QDebug>
+#include <QScrollBar>
+
+#include "ktreeview.h"
+#include "ktreeview_p.h"
+
+KTreeView::KTreeViewPrivate::KTreeViewPrivate(KTreeView *parent)
+ : parent(parent),
+ autoHorizontalScroll(true),
+ scrollTowards(0),
+ scrollPixels(5),
+ scrollDelay(50),
+ leftSideMargin(30),
+ considerDelay(500),
+ topLeftPoint(QPoint(10,10))
+{
+ Q_ASSERT(parent->verticalScrollBar());
+
+ considerDelayTimer.setInterval(considerDelay);
+
+ connect( &considerDelayTimer,
+ SIGNAL(timeout()),
+ this,
+ SLOT(considerAutoScroll())
+ );
+
+ connect( parent->verticalScrollBar(),
+ SIGNAL(rangeChanged(int, int)),
+ &considerDelayTimer,
+ SLOT(start())
+ );
+
+ connect( parent->verticalScrollBar(),
+ SIGNAL(valueChanged(int)),
+ &considerDelayTimer,
+ SLOT(start())
+ );
+
+ connect( parent,
+ SIGNAL( collapsed ( const QModelIndex &)),
+ &considerDelayTimer,
+ SLOT(start())
+ );
+
+ connect( parent,
+ SIGNAL( expanded ( const QModelIndex &)),
+ &considerDelayTimer,
+ SLOT(start())
+ );
+
+}
+
+void KTreeView::KTreeViewPrivate::considerAutoScroll()
+{
+ qDebug() << "Considering auto scroll";
+
+ QModelIndex i = parent->indexAt(topLeftPoint);
+ int smallest = parent->width();
+
+ while (i.isValid())
+ {
+ QRect r = parent->visualRect(i);
+ if (r.top() > parent->height())
+ break;
+
+ int leftSide = r.left();
+
+ smallest = qMin(smallest, leftSide);
+ i = parent->indexBelow(i);
+ }
+
+ int currentScroll = parent->horizontalScrollBar()->value();
+
+ setScrollTowards(smallest + currentScroll - leftSideMargin);
+
+ considerDelayTimer.stop();
+
+}
+
+void KTreeView::KTreeViewPrivate::autoScrollTimeout()
+{
+
+ Q_ASSERT(parent);
+
+ QScrollBar *scrollBar = parent->horizontalScrollBar();
+ if (scrollBar == NULL)
+ {
+ qDebug() << "Warning: no scrollbar present, but told to scroll.";
+ scrollTimer.stop();
+ return;
+ }
+
+ int currentScroll = scrollBar->value();
+
+ int difference = currentScroll - scrollTowards;
+
+ if (qAbs(difference) < scrollPixels)
+ {
+ scrollBar->setValue(scrollTowards);
+ scrollTimer.stop();
+ return;
+ }
+
+ if (difference < 0)
+ {
+ scrollBar->setValue(currentScroll + scrollPixels);
+ }
+ else
+ {
+ scrollBar->setValue(currentScroll - scrollPixels);
+ }
+}
+
+void KTreeView::KTreeViewPrivate::setScrollTowards( int scrollTowards )
+{
+ if (scrollTowards < 0)
+ scrollTowards = 0;
+ this->scrollTowards = scrollTowards;
+ scrollTimer.start(scrollDelay);
+}
+
+//************************************************
+
+KTreeView::KTreeView(QWidget *parent)
+ : QTreeView(parent)
+ , d(new KTreeViewPrivate(this))
+{
+ /* The graphicEffectsLevel was not available in the 4.0.3 version of
+ * the libs I was compiling with, so this is left out for now and
+ * enabled by default...
+ */
+ //if (KGlobalSettings::graphicEffectsLevel() >=
+ //KGlobalSettings::SimpleAnimationEffects)
+ //{
+ setAutoHorizontalScroll(true);
+ //}
+ connect(
+ &d->scrollTimer,
+ SIGNAL(timeout()),
+ d,
+ SLOT(autoScrollTimeout())
+ );
+
+}
+
+void KTreeView::setAutoHorizontalScroll(bool value)
+{
+ d->autoHorizontalScroll = value;
+}
+
+bool KTreeView::autoHorizontalScroll( void )
+{
+ return d->autoHorizontalScroll;
+}
+
+#include "ktreeview.moc"
+#include "ktreeview_p.moc"
--- /dev/null
+/***************************************************************************
+ * Copyright (C) 2008 by <haraldhv (at) stud.ntnu.no> *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
+ ***************************************************************************/
+
+#ifndef _KTREEVIEW_H_
+#define _KTREEVIEW_H_
+
+#include <QTreeView>
+
+class KTreeView : public QTreeView
+{
+
+ Q_OBJECT
+
+ public:
+ KTreeView(QWidget *parent = NULL);
+
+ void setAutoHorizontalScroll(bool value);
+ bool autoHorizontalScroll( void );
+
+ private:
+ class KTreeViewPrivate;
+ KTreeViewPrivate *d;
+
+};
+
+#endif /* ifndef _KTREEVIEW_H_ */
--- /dev/null
+/***************************************************************************
+ * Copyright (C) 2008 by <haraldhv (at) stud.ntnu.no> *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
+ ***************************************************************************/
+
+#ifndef _KTREEVIEW_P_H_
+#define _KTREEVIEW_P_H_
+
+#include <QTimer>
+#include <QObject>
+
+#include "ktreeview.h"
+
+class KTreeView::KTreeViewPrivate : public QObject
+{
+ Q_OBJECT
+
+
+
+ public Q_SLOTS:
+ void autoScrollTimeout();
+ void considerAutoScroll();
+
+ public:
+
+ KTreeViewPrivate(KTreeView *parent);
+ //~KTreeViewPrivate();
+ KTreeView *parent;
+
+ //Function for start scrolling towards a certain position
+ void setScrollTowards( int scrollTowards );
+
+ //Privates for doing the scrolling
+ QTimer scrollTimer;
+ QTimer considerDelayTimer;
+ bool autoHorizontalScroll;
+ int scrollTowards;
+
+ //Constants
+ const int scrollPixels;
+ const int scrollDelay;
+ const int leftSideMargin;
+ const int considerDelay;
+ const QPoint topLeftPoint;
+
+
+};
+
+#endif /* ifndef _KTREEVIEW_P_H_ */
projects / dolphin.git / commitdiff