gwenview/lib/semanticinfo/tagitemdelegate.cpp

   1 // vim: set tabstop=4 shiftwidth=4 noexpandtab:
   2 /*
   3 Gwenview: an image viewer
   4 Copyright 2008 Aurélien Gâteau <aurelien.gateau@free.fr>
   5
   6 This program is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU General Public License
   8 as published by the Free Software Foundation; either version 2
   9 of the License, or (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 51 Franklin Street, Fifth Floor, Cambridge, MA 02110-1301, USA.
  19
  20 */
  21 // Self
  22 #include <tagitemdelegate.moc>
  23
  24 // Qt
  25 #include <QAbstractItemView>
  26 #include <QPainter>
  27 #include <QToolButton>
  28
  29 // KDE
  30 #include <kdebug.h>
  31 #include <kdialog.h>
  32 #include <kiconloader.h>
  33 #include <klocale.h>
  34
  35 // Local
  36 #include <lib/semanticinfo/tagmodel.h>
  37
  38 namespace Gwenview {
  39
  40 TagItemDelegate::TagItemDelegate(QAbstractItemView* view)
  41 : KWidgetItemDelegate(view, view)
  42 {
  43         #define pm(x) view->style()->pixelMetric(QStyle::x)
  44         mMargin     = pm(PM_ToolBarItemMargin);
  45         mSpacing    = pm(PM_ToolBarItemSpacing);
  46         #undef pm
  47         const int iconSize = KIconLoader::global()->currentSize(KIconLoader::Toolbar);
  48         const QSize sz = view->style()->sizeFromContents(QStyle::CT_ToolButton, 0, QSize(iconSize, iconSize));
  49         mButtonSize = qMax(sz.width(), sz.height());
  50 }
  51
  52
  53 QList<QWidget*> TagItemDelegate::createItemWidgets() const {
  54
  55         #define initButton(x) \
  56                 (x)->setAutoRaise(true); \
  57                 setBlockedEventTypes((x), QList<QEvent::Type>() \
  58                         << QEvent::MouseButtonPress \
  59                         << QEvent::MouseButtonRelease \
  60                         << QEvent::MouseButtonDblClick);
  61
  62         QToolButton* assignToAllButton = new QToolButton;
  63         initButton(assignToAllButton);
  64         assignToAllButton->setIcon(KIcon("fill-color")); /* FIXME: Probably not the appropriate icon */
  65         assignToAllButton->setToolTip(i18n("Assign this tag to all selected images"));
  66         connect(assignToAllButton, SIGNAL(clicked()), SLOT(slotAssignToAllButtonClicked()));
  67
  68         QToolButton* removeButton = new QToolButton;
  69         initButton(removeButton);
  70         removeButton->setIcon(KIcon("list-remove"));
  71         connect(removeButton, SIGNAL(clicked()), SLOT(slotRemoveButtonClicked()));
  72
  73         #undef initButton
  74
  75         return QList<QWidget*>() << removeButton << assignToAllButton;
  76 }
  77
  78
  79 void TagItemDelegate::updateItemWidgets(const QList<QWidget*> widgets, const QStyleOptionViewItem& option, const QPersistentModelIndex& index) const {
  80         const bool fullyAssigned = index.data(TagModel::AssignmentStatusRole).toInt() == int(TagModel::FullyAssigned);
  81
  82         QToolButton* removeButton = static_cast<QToolButton*>(widgets[0]);
  83         QToolButton* assignToAllButton = static_cast<QToolButton*>(widgets[1]);
  84
  85         QSize buttonSize(mButtonSize, option.rect.height() - 2 * mMargin);
  86
  87         removeButton->resize(buttonSize);
  88         assignToAllButton->resize(buttonSize);
  89
  90         removeButton->move(option.rect.width() - mButtonSize - mMargin, mMargin);
  91
  92         if (fullyAssigned) {
  93                 assignToAllButton->hide();
  94         } else {
  95                 assignToAllButton->move(removeButton->x() - mButtonSize - mSpacing, mMargin);
  96         }
  97 }
  98
  99
 100 void TagItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const {
 101         if (!index.isValid()) {
 102                 return;
 103         }
 104         const bool selected = option.state & QStyle::State_Selected;
 105         const bool fullyAssigned = index.data(TagModel::AssignmentStatusRole).toInt() == int(TagModel::FullyAssigned);
 106
 107         itemView()->style()->drawPrimitive(QStyle::PE_PanelItemViewItem, &option, painter, 0);
 108
 109         QRect textRect = option.rect;
 110         textRect.setLeft(textRect.left() + mMargin);
 111         textRect.setWidth(textRect.width() - mButtonSize - mMargin - mSpacing);
 112         if (!fullyAssigned) {
 113                 textRect.setWidth(textRect.width() - mButtonSize - mSpacing);
 114         }
 115
 116         painter->setPen(option.palette.color(QPalette::Normal,
 117                 selected
 118                 ? QPalette::HighlightedText
 119                 : QPalette::Text));
 120         painter->drawText(textRect, Qt::AlignLeft | Qt::AlignVCenter, index.data().toString());
 121 }
 122
 123
 124 QSize TagItemDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const {
 125         const int width  = option.fontMetrics.width(index.data().toString());
 126         const int height = qMax(mButtonSize, option.fontMetrics.height());
 127         return QSize(width + 2 * mMargin, height + 2 * mMargin);
 128 }
 129
 130
 131 void TagItemDelegate::slotRemoveButtonClicked() {
 132         const QModelIndex index = focusedIndex();
 133         if (!index.isValid()) {
 134                 kWarning() << "!index.isValid()";
 135                 return;
 136         }
 137         emit removeTagRequested(index.data(TagModel::TagRole).toString());
 138 }
 139
 140
 141 void TagItemDelegate::slotAssignToAllButtonClicked() {
 142         const QModelIndex index = focusedIndex();
 143         if (!index.isValid()) {
 144                 kWarning() << "!index.isValid()";
 145                 return;
 146         }
 147         emit assignTagToAllRequested(index.data(TagModel::TagRole).toString());
 148 }
 149
 150
 151 } // namespace