src/frontends/qt4/iconpalette.C

   1 /**
   2  * \file iconpalette.C
   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 "iconpalette.h"
  14 #include "qt_helpers.h"
  15 #include "controllers/ControlMath.h" // for find_xpm
  16
  17 #include <QPixmap>
  18 #include <QGridLayout>
  19 #include <QPushButton>
  20 #include <QToolTip>
  21
  22 using std::make_pair;
  23 using std::string;
  24 using std::vector;
  25
  26
  27 namespace lyx {
  28 namespace frontend {
  29
  30 FlowLayout::FlowLayout(QWidget *parent) : QLayout(parent)
  31 {
  32         setMargin(0);
  33         setSpacing(-1);
  34 }
  35
  36
  37 FlowLayout::~FlowLayout()
  38 {
  39         QLayoutItem *item;
  40         while ((item = takeAt(0)))
  41                 delete item;
  42 }
  43
  44
  45 void FlowLayout::addItem(QLayoutItem *item)
  46 {
  47         itemList.append(item);
  48 }
  49
  50
  51 int FlowLayout::count() const
  52 {
  53         return itemList.size();
  54 }
  55
  56
  57 QLayoutItem *FlowLayout::itemAt(int index) const
  58 {
  59         return itemList.value(index);
  60 }
  61
  62
  63 QLayoutItem *FlowLayout::takeAt(int index)
  64 {
  65         if (index >= 0 && index < itemList.size())
  66                 return itemList.takeAt(index);
  67         else
  68                 return 0;
  69 }
  70
  71
  72 Qt::Orientations FlowLayout::expandingDirections() const
  73 {
  74         return 0;
  75 }
  76
  77
  78 bool FlowLayout::hasHeightForWidth() const
  79 {
  80         return true;
  81 }
  82
  83
  84 int FlowLayout::heightForWidth(int width) const
  85 {
  86         int height = doLayout(QRect(0, 0, width, 0), true);
  87         return height;
  88 }
  89
  90
  91 void FlowLayout::setGeometry(const QRect &rect)
  92 {
  93         QLayout::setGeometry(rect);
  94         doLayout(rect, false);
  95 }
  96
  97
  98 QSize FlowLayout::sizeHint() const
  99 {
 100         // default to (max) 6 columns
 101         int const cols = qMin(itemList.size(), 6);
 102         int const rows = (itemList.size() - 1 )/6 + 1;
 103         return QSize(cols * minimumSize().width() + 1,
 104                 rows * minimumSize().height() + 1);
 105 }
 106
 107
 108 QSize FlowLayout::minimumSize() const
 109 {
 110         QSize size;
 111         int const n = itemList.size();
 112     for (int i = 0; i < n; ++i) {
 113                 size = size.expandedTo(itemList.at(i)->minimumSize());
 114         }
 115         return size;
 116 }
 117
 118
 119 int FlowLayout::doLayout(const QRect &rect, bool testOnly) const
 120 {
 121         int x = rect.x();
 122         int y = rect.y();
 123         int lineHeight = 0;
 124
 125     for (int i = 0; i < itemList.size(); ++i) {
 126                 QLayoutItem * item = itemList.at(i);
 127                 int nextX = x + item->sizeHint().width() + spacing();
 128                 if (nextX - spacing() > rect.right() && lineHeight > 0) {
 129                         x = rect.x();
 130                         y = y + lineHeight + spacing();
 131                 nextX = x + item->sizeHint().width() + spacing();
 132                         lineHeight = 0;
 133                 }
 134
 135                 if (!testOnly)
 136                         item->setGeometry(QRect(QPoint(x, y), item->sizeHint()));
 137
 138                 x = nextX;
 139                 lineHeight = qMax(lineHeight, item->sizeHint().height());
 140         }
 141         return y + lineHeight - rect.y();
 142 }
 143
 144
 145 IconPalette::IconPalette(QWidget * parent, char const ** entries)
 146         : QWidget(parent)
 147 {
 148         FlowLayout * layout_ = new FlowLayout(this);
 149         layout_->setSpacing(0);
 150
 151         int const button_size = 40;
 152         for (int i = 0; *entries[i]; ++i) {
 153                 QPushButton * p = new QPushButton;
 154                 p->setFixedSize(button_size, button_size);
 155                 p->setIcon(QPixmap(toqstr(lyx::frontend::find_xpm(entries[i]))));
 156                 p->setToolTip(toqstr(string("\\") + entries[i]));
 157                 connect(p, SIGNAL(clicked()), this, SLOT(clicked()));
 158                 buttons_.push_back(make_pair(p, entries[i]));
 159                 layout_->addWidget(p);
 160         }
 161
 162 }
 163
 164
 165 void IconPalette::clicked()
 166 {
 167         vector<Button>::const_iterator it = buttons_.begin();
 168         vector<Button>::const_iterator const end = buttons_.end();
 169         for (; it != end; ++it) {
 170                 if (sender() == it->first) {
 171                         // emit signal
 172                         button_clicked(it->second);
 173                         return;
 174                 }
 175         }
 176 }
 177
 178
 179 } // namespace frontend
 180 } // namespace lyx
 181
 182 #include "iconpalette_moc.cpp"