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 <QStackedWidget>
  21 #include <QTreeWidget>
  22 #include <QHBoxLayout>
  23 #include <QHeaderView>
  24
  25 #include "support/lassert.h"
  26
  27 #include <iostream>
  28
  29 using namespace std;
  30
  31 namespace lyx {
  32 namespace frontend {
  33
  34
  35 PanelStack::PanelStack(QWidget * parent)
  36         : QWidget(parent)
  37 {
  38         list_ = new QTreeWidget(this);
  39         stack_ = new QStackedWidget(this);
  40
  41         list_->setRootIsDecorated(false);
  42         list_->setColumnCount(1);
  43         // Hide the pointless list header
  44         list_->header()->hide();
  45 //      QStringList HeaderLabels;
  46 //      HeaderLabels << QString("Category");
  47 //      list_->setHeaderLabels(HeaderLabels);
  48
  49         connect(list_, SIGNAL(currentItemChanged (QTreeWidgetItem*, QTreeWidgetItem*)),
  50                 this, SLOT(switchPanel(QTreeWidgetItem *, QTreeWidgetItem*)));
  51         connect(list_, SIGNAL(itemClicked (QTreeWidgetItem*, int)),
  52                 this, SLOT(itemSelected(QTreeWidgetItem *, int)));
  53
  54         QHBoxLayout * layout = new QHBoxLayout(this);
  55         layout->addWidget(list_, 0);
  56         layout->addWidget(stack_, 1);
  57 }
  58
  59
  60 void PanelStack::addCategory(QString const & name, QString const & parent)
  61 {
  62         QTreeWidgetItem * item = 0;
  63
  64         LYXERR(Debug::GUI, "addCategory n= " << name << "   parent= ");
  65
  66         int depth = 1;
  67
  68         if (parent.isEmpty()) {
  69                 item = new QTreeWidgetItem(list_);
  70                 item->setText(0, name);
  71         }
  72         else {
  73                 if (!panel_map_.contains(parent))
  74                         addCategory(parent);
  75                 item = new QTreeWidgetItem(panel_map_.value(parent));
  76                 item->setText(0, name);
  77                 depth = 2;
  78                 list_->setRootIsDecorated(true);
  79         }
  80
  81         panel_map_[name] = item;
  82
  83         QFontMetrics fm(list_->font());
  84
  85         // calculate the real size the current item needs in the listview
  86         int itemsize = fm.width(name) + 10
  87                 + list_->indentation() * depth;
  88         // adjust the listview width to the max. itemsize
  89         if (itemsize > list_->minimumWidth())
  90                 list_->setMinimumWidth(itemsize);
  91 }
  92
  93
  94 void PanelStack::addPanel(QWidget * panel, QString const & name, QString const & parent)
  95 {
  96         addCategory(name, parent);
  97         QTreeWidgetItem * item = panel_map_.value(name);
  98         widget_map_[item] = panel;
  99         stack_->addWidget(panel);
 100         stack_->setMinimumSize(panel->minimumSize());
 101 }
 102
 103
 104 void PanelStack::setCurrentPanel(QString const & name)
 105 {
 106         QTreeWidgetItem * item = panel_map_.value(name, 0);
 107         LASSERT(item, /**/);
 108
 109         // force on first set
 110         if (list_->currentItem() == item)
 111                 switchPanel(item);
 112
 113         list_->setCurrentItem(item);
 114 }
 115
 116
 117 void PanelStack::switchPanel(QTreeWidgetItem * item,
 118                              QTreeWidgetItem * previous)
 119 {
 120         // do nothing when clicked on whitespace (item=NULL)
 121         if( !item )
 122                 return;
 123
 124         // if we have a category, expand the tree and go to the
 125         // first item
 126         if (item->childCount() > 0) {
 127                 item->setExpanded(true);
 128                 if (previous && previous->parent() != item)
 129                         switchPanel( item->child(0), previous );
 130         }
 131         else
 132                 if (QWidget * w = widget_map_.value(item, 0))
 133                         stack_->setCurrentWidget(w);
 134 }
 135
 136
 137 void PanelStack::itemSelected(QTreeWidgetItem * item, int)
 138 {
 139         // de-select the category if a child is selected
 140         if (item->childCount() > 0 && item->child(0)->isSelected())
 141                 item->setSelected(false);
 142 }
 143
 144
 145 QSize PanelStack::sizeHint() const
 146 {
 147         return QSize(list_->width() + stack_->width(),
 148                 qMax(list_->height(), stack_->height()));
 149 }
 150
 151 } // namespace frontend
 152 } // namespace lyx
 153
 154 #include "PanelStack_moc.cpp"