lyx_mirror/src/frontends/qt4/PanelStack.cpp

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/**
* \file PanelStack.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author John Levon
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "PanelStack.h"
#include "qt_helpers.h"
#include "support/debug.h"
#include <QFontMetrics>
#include <QHBoxLayout>
#include <QHeaderView>
#include <QStackedWidget>
#include <QTreeWidget>
#include "support/lassert.h"
using namespace std;
namespace lyx {
namespace frontend {
PanelStack::PanelStack(QWidget * parent)
: QWidget(parent)
{
list_ = new QTreeWidget(this);
stack_ = new QStackedWidget(this);
list_->setRootIsDecorated(false);
list_->setColumnCount(1);
list_->header()->hide();
connect(list_, SIGNAL(currentItemChanged(QTreeWidgetItem*, QTreeWidgetItem*)),
this, SLOT(switchPanel(QTreeWidgetItem *, QTreeWidgetItem*)));
connect(list_, SIGNAL(itemClicked (QTreeWidgetItem*, int)),
this, SLOT(itemSelected(QTreeWidgetItem *, int)));
QHBoxLayout * layout = new QHBoxLayout(this);
layout->addWidget(list_, 0);
layout->addWidget(stack_, 1);
}
void PanelStack::addCategory(QString const & name, QString const & parent)
{
QTreeWidgetItem * item = 0;
LYXERR(Debug::GUI, "addCategory n= " << name << " parent= ");
int depth = 1;
if (parent.isEmpty()) {
item = new QTreeWidgetItem(list_);
item->setText(0, name);
}
else {
if (!panel_map_.contains(parent))
addCategory(parent);
item = new QTreeWidgetItem(panel_map_.value(parent));
item->setText(0, name);
depth = 2;
list_->setRootIsDecorated(true);
}
panel_map_[name] = item;
QFontMetrics fm(list_->font());
// calculate the real size the current item needs in the listview
int itemsize = fm.width(name) + 10 + list_->indentation() * depth;
// adjust the listview width to the max. itemsize
if (itemsize > list_->minimumWidth())
list_->setMinimumWidth(itemsize);
}
void PanelStack::addPanel(QWidget * panel, QString const & name, QString const & parent)
{
addCategory(name, parent);
QTreeWidgetItem * item = panel_map_.value(name);
widget_map_[item] = panel;
stack_->addWidget(panel);
stack_->setMinimumSize(panel->minimumSize());
}
void PanelStack::showPanel(QString const & name, bool show)
{
QTreeWidgetItem * item = panel_map_.value(name, 0);
LASSERT(item, return);
item->setHidden(!show);
}
void PanelStack::setCurrentPanel(QString const & name)
{
QTreeWidgetItem * item = panel_map_.value(name, 0);
LASSERT(item, return);
// force on first set
if (list_->currentItem() == item)
switchPanel(item);
list_->setCurrentItem(item);
}
bool PanelStack::isCurrentPanel(QString const & name) const
{
QTreeWidgetItem * item = panel_map_.value(name, 0);
LASSERT(item, return false);
return (list_->currentItem() == item);
}
void PanelStack::switchPanel(QTreeWidgetItem * item,
QTreeWidgetItem * previous)
{
// do nothing when clicked on whitespace (item=NULL)
if( !item )
return;
// if we have a category, expand the tree and go to the
// first item
if (item->childCount() > 0) {
item->setExpanded(true);
if (previous && previous->parent() != item)
switchPanel( item->child(0), previous );
}
else if (QWidget * w = widget_map_.value(item, 0)) {
stack_->setCurrentWidget(w);
}
}
void PanelStack::itemSelected(QTreeWidgetItem * item, int)
{
// de-select the category if a child is selected
if (item->childCount() > 0 && item->child(0)->isSelected())
item->setSelected(false);
}
QSize PanelStack::sizeHint() const
{
return QSize(list_->width() + stack_->width(),
qMax(list_->height(), stack_->height()));
}
} // namespace frontend
} // namespace lyx
#include "moc_PanelStack.cpp"