src/frontends/qt4/PanelStack.cpp

   1 /**
   2  * \file PanelStack.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author John Levon
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "PanelStack.h"
  14
  15 #include "qt_helpers.h"
  16
  17 #include "support/debug.h"
  18
  19 #include <QFontMetrics>
  20 #include <QHBoxLayout>
  21 #include <QHeaderView>
  22 #include <QStackedWidget>
  23 #include <QTreeWidget>
  24
  25 #include "support/lassert.h"
  26
  27 using namespace std;
  28
  29 namespace lyx {
  30 namespace frontend {
  31
  32
  33 PanelStack::PanelStack(QWidget * parent)
  34         : QWidget(parent)
  35 {
  36         list_ = new QTreeWidget(this);
  37         stack_ = new QStackedWidget(this);
  38
  39         list_->setRootIsDecorated(false);
  40         list_->setColumnCount(1);
  41         list_->header()->hide();
  42         list_->header()->setResizeMode(QHeaderView::ResizeToContents);
  43         list_->header()->setStretchLastSection(false);
  44         list_->setMinimumSize(list_->viewport()->size());
  45
  46         connect(list_, SIGNAL(currentItemChanged(QTreeWidgetItem*, QTreeWidgetItem*)),
  47                 this, SLOT(switchPanel(QTreeWidgetItem *, QTreeWidgetItem*)));
  48         connect(list_, SIGNAL(itemClicked (QTreeWidgetItem*, int)),
  49                 this, SLOT(itemSelected(QTreeWidgetItem *, int)));
  50
  51         QHBoxLayout * layout = new QHBoxLayout(this);
  52         layout->addWidget(list_, 0);
  53         layout->addWidget(stack_, 1);
  54 }
  55
  56
  57 void PanelStack::addCategory(QString const & name, QString const & parent)
  58 {
  59         QTreeWidgetItem * item = 0;
  60
  61         LYXERR(Debug::GUI, "addCategory n= " << name << "   parent= ");
  62
  63         int depth = 1;
  64
  65         if (parent.isEmpty()) {
  66                 item = new QTreeWidgetItem(list_);
  67                 item->setText(0, name);
  68         }
  69         else {
  70                 if (!panel_map_.contains(parent))
  71                         addCategory(parent);
  72                 item = new QTreeWidgetItem(panel_map_.value(parent));
  73                 item->setText(0, name);
  74                 depth = 2;
  75                 list_->setRootIsDecorated(true);
  76         }
  77
  78         panel_map_[name] = item;
  79
  80         QFontMetrics fm(list_->font());
  81
  82         // calculate the real size the current item needs in the listview
  83         int itemsize = fm.width(name) + 10 + list_->indentation() * depth;
  84         // adjust the listview width to the max. itemsize
  85         if (itemsize > list_->minimumWidth())
  86                 list_->setMinimumWidth(itemsize);
  87 }
  88
  89
  90 void PanelStack::addPanel(QWidget * panel, QString const & name, QString const & parent)
  91 {
  92         addCategory(name, parent);
  93         QTreeWidgetItem * item = panel_map_.value(name);
  94         widget_map_[item] = panel;
  95         stack_->addWidget(panel);
  96         stack_->setMinimumSize(panel->minimumSize());
  97 }
  98
  99
 100 void PanelStack::showPanel(QString const & name, bool show)
 101 {
 102         QTreeWidgetItem * item = panel_map_.value(name, 0);
 103         LASSERT(item, return);
 104
 105         item->setHidden(!show);
 106 }
 107
 108
 109 void PanelStack::setCurrentPanel(QString const & name)
 110 {
 111         QTreeWidgetItem * item = panel_map_.value(name, 0);
 112         LASSERT(item, return);
 113
 114         // force on first set
 115         if (list_->currentItem() == item)
 116                 switchPanel(item);
 117
 118         list_->setCurrentItem(item);
 119 }
 120
 121
 122 bool PanelStack::isCurrentPanel(QString const & name) const
 123 {
 124         QTreeWidgetItem * item = panel_map_.value(name, 0);
 125         LASSERT(item, return false);
 126
 127         return (list_->currentItem() == item);
 128 }
 129
 130
 131 void PanelStack::switchPanel(QTreeWidgetItem * item,
 132                              QTreeWidgetItem * previous)
 133 {
 134         // do nothing when clicked on whitespace (item=NULL)
 135         if( !item )
 136                 return;
 137
 138         // if we have a category, expand the tree and go to the
 139         // first item
 140         if (item->childCount() > 0) {
 141                 item->setExpanded(true);
 142                 if (previous && previous->parent() != item)
 143                         switchPanel( item->child(0), previous );
 144         }
 145         else if (QWidget * w = widget_map_.value(item, 0)) {
 146                 stack_->setCurrentWidget(w);
 147         }
 148 }
 149
 150
 151 void PanelStack::itemSelected(QTreeWidgetItem * item, int)
 152 {
 153         // de-select the category if a child is selected
 154         if (item->childCount() > 0 && item->child(0)->isSelected())
 155                 item->setSelected(false);
 156 }
 157
 158
 159 QSize PanelStack::sizeHint() const
 160 {
 161         return QSize(list_->width() + stack_->width(),
 162                 qMax(list_->height(), stack_->height()));
 163 }
 164
 165 } // namespace frontend
 166 } // namespace lyx
 167
 168 #include "moc_PanelStack.cpp"