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
  43         connect(list_, SIGNAL(currentItemChanged(QTreeWidgetItem*, QTreeWidgetItem*)),
  44                 this, SLOT(switchPanel(QTreeWidgetItem *, QTreeWidgetItem*)));
  45         connect(list_, SIGNAL(itemClicked (QTreeWidgetItem*, int)),
  46                 this, SLOT(itemSelected(QTreeWidgetItem *, int)));
  47
  48         QHBoxLayout * layout = new QHBoxLayout(this);
  49         layout->addWidget(list_, 0);
  50         layout->addWidget(stack_, 1);
  51 }
  52
  53
  54 void PanelStack::addCategory(QString const & name, QString const & parent)
  55 {
  56         QTreeWidgetItem * item = 0;
  57
  58         LYXERR(Debug::GUI, "addCategory n= " << name << "   parent= ");
  59
  60         int depth = 1;
  61
  62         if (parent.isEmpty()) {
  63                 item = new QTreeWidgetItem(list_);
  64                 item->setText(0, name);
  65         }
  66         else {
  67                 if (!panel_map_.contains(parent))
  68                         addCategory(parent);
  69                 item = new QTreeWidgetItem(panel_map_.value(parent));
  70                 item->setText(0, name);
  71                 depth = 2;
  72                 list_->setRootIsDecorated(true);
  73         }
  74
  75         panel_map_[name] = item;
  76
  77         QFontMetrics fm(list_->font());
  78
  79         // calculate the real size the current item needs in the listview
  80         int itemsize = fm.width(name) + 10 + list_->indentation() * depth;
  81         // adjust the listview width to the max. itemsize
  82         if (itemsize > list_->minimumWidth())
  83                 list_->setMinimumWidth(itemsize);
  84 }
  85
  86
  87 void PanelStack::addPanel(QWidget * panel, QString const & name, QString const & parent)
  88 {
  89         addCategory(name, parent);
  90         QTreeWidgetItem * item = panel_map_.value(name);
  91         widget_map_[item] = panel;
  92         stack_->addWidget(panel);
  93         stack_->setMinimumSize(panel->minimumSize());
  94 }
  95
  96
  97 void PanelStack::setCurrentPanel(QString const & name)
  98 {
  99         QTreeWidgetItem * item = panel_map_.value(name, 0);
 100         LASSERT(item, return);
 101
 102         // force on first set
 103         if (list_->currentItem() == item)
 104                 switchPanel(item);
 105
 106         list_->setCurrentItem(item);
 107 }
 108
 109
 110 void PanelStack::switchPanel(QTreeWidgetItem * item,
 111                              QTreeWidgetItem * previous)
 112 {
 113         // do nothing when clicked on whitespace (item=NULL)
 114         if( !item )
 115                 return;
 116
 117         // if we have a category, expand the tree and go to the
 118         // first item
 119         if (item->childCount() > 0) {
 120                 item->setExpanded(true);
 121                 if (previous && previous->parent() != item)
 122                         switchPanel( item->child(0), previous );
 123         }
 124         else if (QWidget * w = widget_map_.value(item, 0)) {
 125                 stack_->setCurrentWidget(w);
 126         }
 127 }
 128
 129
 130 void PanelStack::itemSelected(QTreeWidgetItem * item, int)
 131 {
 132         // de-select the category if a child is selected
 133         if (item->childCount() > 0 && item->child(0)->isSelected())
 134                 item->setSelected(false);
 135 }
 136
 137
 138 QSize PanelStack::sizeHint() const
 139 {
 140         return QSize(list_->width() + stack_->width(),
 141                 qMax(list_->height(), stack_->height()));
 142 }
 143
 144 } // namespace frontend
 145 } // namespace lyx
 146
 147 #include "moc_PanelStack.cpp"