1 files changed, 342 insertions, 0 deletions
diff --git a/src/app/treeview.cpp b/src/app/treeview.cpp
new file mode 100644
index 0000000..ddf24a5
--- /dev/null
+++ b/src/app/treeview.cpp
@@ -0,0 +1,342 @@
+// vim: set tabstop=4 shiftwidth=4 noexpandtab:
+/*
+Gwenview - A simple image viewer for KDE
+Copyright 2000-2004 Aur�ien G�eau
+
+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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+#include "treeview.moc"
+
+// Qt
+#include <qheader.h>
+#include <qtimer.h>
+
+// KDE
+#include <kdebug.h>
+#include <kiconloader.h>
+#include <kmimetype.h>
+#include <kurldrag.h>
+
+// Local
+#include "../gvcore/fileoperation.h"
+
+namespace Gwenview {
+
+#undef ENABLE_LOG
+#undef LOG
+//#define ENABLE_LOG
+#ifdef ENABLE_LOG
+#define LOG(x) kdDebug() << k_funcinfo << x << endl
+#else
+#define LOG(x) ;
+#endif
+
+const int AUTO_OPEN_DELAY=1000;
+const int DND_ICON_COUNT=8;
+const char* DND_PREFIX="dnd";
+
+
+struct TreeView::Private {
+	TreeView* mView;
+	KFileTreeBranch* mBranch;
+	KFileTreeViewItem* mDropTarget;
+	QTimer* mAutoOpenTimer;
+
+	KFileTreeViewItem* findViewItem(KFileTreeViewItem* parent,const QString& text) {
+		QListViewItem* item;
+
+		for (item=parent->firstChild();item;item=item->nextSibling()) {
+			if (item->text(0)==text) {
+				return static_cast<KFileTreeViewItem*>(item);
+			}
+		}
+		return 0L;
+	}
+	
+	void setURLInternal(const KURL& url) {
+		LOG(url.prettyURL() );
+		QString path=url.path();
+		
+		if (!mBranch || !mBranch->rootUrl().isParentOf(url)) {
+			mView->createBranch(url);
+			return;
+		}
+
+		// The request URL is a child of the branch, expand the branch to reach
+		// the child
+		LOG("Expanding to reach child");
+		if(mBranch->rootUrl().path()!="/") {
+			path.remove(0,mBranch->rootUrl().path().length());
+		}
+		LOG("Path=" << path);
+
+		// Finds the deepest existing view item
+		QStringList folderParts=QStringList::split('/',path);
+		QStringList::Iterator folderIter=folderParts.begin();
+		QStringList::Iterator endFolderIter=folderParts.end();
+		KFileTreeViewItem* viewItem=mBranch->root();
+		for(;folderIter!=endFolderIter;++folderIter) {
+
+			KFileTreeViewItem* nextViewItem=findViewItem(viewItem,*folderIter);
+			if (!nextViewItem) break;
+			viewItem=nextViewItem;
+		}
+		LOG("Deepest existing view item=" << viewItem->url());
+
+		// If this is the wanted item, select it,
+		// otherwise set the url as the next to select
+		if (viewItem->url().equals(url,true)) {
+			LOG("We are done");
+			mView->setCurrentItem(viewItem);
+			mView->ensureItemVisible(viewItem);
+			mView->slotSetNextUrlToSelect(KURL());
+		} else {
+			LOG("We continue");
+			mView->slotSetNextUrlToSelect(url);
+		}
+		
+		LOG("Opening deepest existing view item");
+		viewItem->setOpen(true);
+	}
+};
+
+
+TreeView::TreeView(QWidget* parent)
+: KFileTreeView(parent) {
+	d=new Private;
+	d->mView=this;
+	d->mBranch=0;
+	d->mDropTarget=0;
+	d->mAutoOpenTimer=new QTimer(this);
+	
+	// Look
+	addColumn(QString::null);
+	header()->hide();
+	setAllColumnsShowFocus(true);
+	setRootIsDecorated(false);
+	setFullWidth(true);
+	
+	// Drag'n'drop
+	setDragEnabled(true);
+	setDropVisualizer(false);
+	setDropHighlighter(true);
+	setAcceptDrops(true);
+
+	connect(d->mAutoOpenTimer, SIGNAL(timeout()),
+		this, SLOT(autoOpenDropTarget()));
+}
+
+
+TreeView::~TreeView() {
+	delete d;
+}
+
+
+void TreeView::setURL(const KURL& url) {
+	LOG(url.prettyURL());
+	if (currentURL().equals(url,true)) return;
+	if (m_nextUrlToSelect.equals(url,true)) return;
+	slotSetNextUrlToSelect(url);
+	
+	// Do not update the view if it's hidden, the url has been stored with
+	// slotSetNextUrlToSelect. The view will expand to it next time it's shown.
+	if (!isVisible()) {
+		LOG("We are hidden, just store the url");
+		return;
+	}
+
+	d->setURLInternal(url);
+}
+
+
+void TreeView::slotTreeViewPopulateFinished(KFileTreeViewItem* item) {
+	QListViewItem* child;
+	if (!item) return;
+	KURL url=item->url();
+
+	if (d->mDropTarget) {
+		startAnimation(d->mDropTarget,DND_PREFIX,DND_ICON_COUNT);
+	}
+
+	LOG("itemURL=" << url);
+	LOG("m_nextUrlToSelect=" << m_nextUrlToSelect);
+
+	// We reached the URL to select, get out
+	if (url.equals(m_nextUrlToSelect, true)) {
+		slotSetNextUrlToSelect(KURL());
+		return;
+	}
+
+	// This URL is not a parent of a wanted URL, get out
+	if (!url.isParentOf(m_nextUrlToSelect)) return;
+
+	// Find the next child item and open it
+	LOG("Looking for next child");
+	for (child=item->firstChild(); child; child=child->nextSibling()) {
+		url=static_cast<KFileTreeViewItem*>(child)->url();
+		if (url.isParentOf(m_nextUrlToSelect)) {
+			LOG("Opening child with URL=" << url);
+			ensureItemVisible(child);
+			child->setOpen(true);
+			return;
+		}
+	}
+}
+
+
+void TreeView::createBranch(const KURL& url) {
+	if (d->mBranch) {
+		removeBranch(d->mBranch);
+	}
+	QString title=url.prettyURL(0, KURL::StripFileProtocol);
+	d->mBranch=addBranch(url, title, SmallIcon(KMimeType::iconForURL(url)) );
+	setDirOnlyMode(d->mBranch, true);
+	d->mBranch->setChildRecurse(false);
+	d->mBranch->root()->setOpen(true);
+
+	connect(d->mBranch, SIGNAL(populateFinished(KFileTreeViewItem*) ),
+		this, SLOT(slotTreeViewPopulateFinished(KFileTreeViewItem*)) );
+}
+	
+
+
+/**
+ * Override this method to make sure that the item is selected, opened and
+ * visible
+ */
+void TreeView::slotNewTreeViewItems(KFileTreeBranch* branch, const KFileTreeViewItemList& itemList) {
+	if( ! branch ) return;
+	LOG("");
+	if(m_nextUrlToSelect.isEmpty()) return;
+
+	KFileTreeViewItemListIterator it( itemList );
+
+	for(;it.current(); ++it ) {
+		KURL url = (*it)->url();
+
+		// This is an URL to select
+		// (We block signals to avoid simulating a click on the dir item)
+		if (m_nextUrlToSelect.equals(url,true)) {
+			blockSignals(true);
+			setCurrentItem(*it);
+			blockSignals(false);
+
+			ensureItemVisible(*it);
+			(*it)->setOpen(true);
+			m_nextUrlToSelect = KURL();
+			return;
+		}
+	}
+}
+
+
+/**
+ * Override showEvent to make sure the view shows the correct
+ * dir when it's shown. Since the view doesn't update if it's
+ * hidden
+ */
+void TreeView::showEvent(QShowEvent* event) {
+	LOG("m_nextUrlToSelect=" << m_nextUrlToSelect.pathOrURL());
+	if (m_nextUrlToSelect.isValid() && !currentURL().equals(m_nextUrlToSelect,true)) {
+		d->setURLInternal(m_nextUrlToSelect);
+	}
+	QWidget::showEvent(event);
+}
+
+
+void TreeView::contentsDragMoveEvent(QDragMoveEvent* event) {
+	if (!KURLDrag::canDecode(event)) {
+		event->ignore();
+		return;
+	}
+
+	// Get a pointer to the new drop item
+	QPoint point(0,event->pos().y());
+	KFileTreeViewItem* newDropTarget=static_cast<KFileTreeViewItem*>( itemAt(contentsToViewport(point)) );
+	if (!newDropTarget) {
+		event->ignore();
+		d->mAutoOpenTimer->stop();
+		if (d->mDropTarget) {
+			stopAnimation(d->mDropTarget);
+			d->mDropTarget=0L;
+		}
+		return;
+	}
+
+	event->accept();
+	if (newDropTarget==d->mDropTarget) return;
+	if (d->mDropTarget) {
+		stopAnimation(d->mDropTarget);
+	}
+
+	// Restart auto open timer if we are over a new item
+	d->mAutoOpenTimer->stop();
+	d->mDropTarget=newDropTarget;
+	startAnimation(newDropTarget,DND_PREFIX,DND_ICON_COUNT);
+	d->mAutoOpenTimer->start(AUTO_OPEN_DELAY,true);
+}
+
+
+void TreeView::contentsDragLeaveEvent(QDragLeaveEvent*) {
+	d->mAutoOpenTimer->stop();
+	if (d->mDropTarget) {
+		stopAnimation(d->mDropTarget);
+		d->mDropTarget=0L;
+	}
+}
+
+
+void TreeView::contentsDropEvent(QDropEvent* event) {
+	d->mAutoOpenTimer->stop();
+
+	// Get data from drop (do it before showing menu to avoid mDropTarget changes)
+	if (!d->mDropTarget) return;
+	KURL dest=d->mDropTarget->url();
+
+	KURL::List urls;
+	if (!KURLDrag::decode(event,urls)) return;
+
+	// Show popup
+	bool wasMoved;
+	FileOperation::openDropURLMenu(this, urls, dest, &wasMoved);
+
+	if (wasMoved) {
+		// If the current url was in the list, set the drop target as the new
+		// current item
+		KURL current=currentURL();
+		KURL::List::ConstIterator it=urls.begin();
+		for (; it!=urls.end(); ++it) {
+			if (current.equals(*it,true)) {
+				setCurrentItem(d->mDropTarget);
+				break;
+			}
+		}
+	}
+
+	// Reset drop target
+	if (d->mDropTarget) {
+		stopAnimation(d->mDropTarget);
+		d->mDropTarget=0L;
+	}
+}
+
+
+void TreeView::autoOpenDropTarget() {
+	if (d->mDropTarget) {
+		d->mDropTarget->setOpen(true);
+	}
+}
+} // namespace