src/Gui/AddressRowWidget.cpp

   1 /* Copyright (C) 2006 - 2015 Jan Kundrát <jkt@kde.org>
   2
   3    This file is part of the Trojita Qt IMAP e-mail client,
   4    http://trojita.flaska.net/
   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 as
   8    published by the Free Software Foundation; either version 2 of
   9    the License or (at your option) version 3 or any later version
  10    accepted by the membership of KDE e.V. (or its successor approved
  11    by the membership of KDE e.V.), which shall act as a proxy
  12    defined in Section 14 of version 3 of the license.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22 #include "Gui/AddressRowWidget.h"
  23 #include "Gui/FlowLayout.h"
  24 #include "Gui/OneEnvelopeAddress.h"
  25
  26 #include <QLabel>
  27 #include <QMouseEvent>
  28 #include <QPainter>
  29 #include <QTextDocument>
  30
  31 namespace Gui {
  32
  33 static const int nonExpandingLength = 3*33;
  34
  35 static int plainChars(const QLabel *l)
  36 {
  37     static QTextDocument converter;
  38     converter.setHtml(l->text());
  39     return converter.toPlainText().length();
  40 }
  41
  42 AddressRowWidget::AddressRowWidget(QWidget *parent, const QString &description,
  43                                    const QList<Imap::Message::MailAddress> &addresses, MessageView *messageView):
  44     QWidget(parent), m_expander(0), m_expandedLength(0)
  45 {
  46     FlowLayout *lay = new FlowLayout(this, 0, 0, 0);
  47     setLayout(lay);
  48
  49     setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
  50
  51     addAddresses(description, addresses, messageView);
  52 }
  53
  54 void AddressRowWidget::addAddresses(const QString &description, const QList<Imap::Message::MailAddress> &addresses, MessageView *messageView)
  55 {
  56     if (m_expander)
  57         layout()->removeWidget(m_expander);
  58     if (!description.isEmpty()) {
  59         QLabel *title = new QLabel(description, this);
  60         title->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
  61         title->setTextInteractionFlags(Qt::TextSelectableByMouse | Qt::LinksAccessibleByMouse);
  62         layout()->addWidget(title);
  63         if (m_expander)
  64             title->hide();
  65     }
  66     int collapse = m_expander ? m_expander->expanding() : 0;
  67     for (int i = 0; i < addresses.size(); ++i) {
  68         auto *w = new OneEnvelopeAddress(this, addresses[i], messageView,
  69                                          i == addresses.size() - 1 ?
  70                                          OneEnvelopeAddress::Position::Last :
  71                                          OneEnvelopeAddress::Position::Middle);
  72         m_expandedLength += plainChars(w);
  73         layout()->addWidget(w);
  74         if (collapse || (i > 1 && m_expandedLength > nonExpandingLength)) {
  75             w->hide();
  76             ++collapse;
  77         }
  78     }
  79     if (collapse && !m_expander) {
  80         m_expander = new Expander(this, collapse);
  81         connect(m_expander, &Expander::clicked, this, &AddressRowWidget::toggle);
  82     }
  83     if (m_expander)
  84         layout()->addWidget(m_expander);
  85 }
  86
  87 void AddressRowWidget::toggle()
  88 {
  89     Q_ASSERT(m_expander);
  90     if (m_expander->expanding()) {
  91         m_expander->setExpanding(false);
  92         for (int i = 0; i < layout()->count(); ++i) {
  93             if (QWidget *w = layout()->itemAt(i)->widget())
  94                 w->show();
  95         }
  96     } else {
  97         int chars = 0, addresses = 0;
  98         int collapse = 0;
  99         for (int i = 0; i < layout()->count(); ++i) {
 100             QWidget *w = layout()->itemAt(i)->widget();
 101             if (collapse && w != m_expander) {
 102                 ++collapse;
 103                 w->hide();
 104                 continue;
 105             }
 106             if (OneEnvelopeAddress *oea = qobject_cast<OneEnvelopeAddress*>(w)) {
 107                 ++addresses;
 108                 chars += plainChars(oea);
 109                 if ((collapse = (addresses > 1 && chars > nonExpandingLength)))
 110                     w->hide();
 111             }
 112         }
 113         m_expander->setExpanding(collapse);
 114     }
 115 }
 116
 117 Expander::Expander(QWidget *parent, int count) : QLabel(parent)
 118 {
 119     setCursor(Qt::PointingHandCursor);
 120     setExpanding(count);
 121 }
 122
 123 int Expander::expanding() const {
 124     return m_expanding;
 125 }
 126
 127 void Expander::setExpanding(const int expanding)
 128 {
 129     m_expanding = expanding;
 130     setToolTip(expanding ? tr("Click to see %1 more items").arg(expanding) : tr("Click to collapse"));
 131 }
 132
 133 QSize Expander::sizeHint() const
 134 {
 135     QSize s = QLabel::sizeHint();
 136     s.setWidth(m_expanding ? 2*s.height() : s.height());
 137     return s;
 138 }
 139
 140 void Expander::mouseReleaseEvent(QMouseEvent *me)
 141 {
 142     if (me->button() == Qt::LeftButton)
 143         emit clicked();
 144 }
 145
 146 void Expander::paintEvent(QPaintEvent *pe)
 147 {
 148     QPainter p(this);
 149     p.setRenderHint(QPainter::Antialiasing);
 150     QRectF r(rect());
 151     r.setWidth(height());
 152     if (m_expanding) {
 153         // ellipsis
 154         p.setPen(palette().color(foregroundRole()));
 155         p.setBrush(Qt::NoBrush);
 156         p.drawText(r, Qt::AlignCenter, QStringLiteral("\u2026"));
 157         r.moveRight(rect().right());
 158     }
 159     p.setBrush(palette().color(foregroundRole()));
 160     p.setPen(Qt::NoPen);
 161     p.drawEllipse(r);
 162     p.setBrush(palette().color(backgroundRole()));
 163     float d = r.height()/4.0f;
 164     r.adjust(d,d,-d,-d);
 165     // the unicode triangles are not necessarily centered - looks crap
 166     if (m_expanding) {
 167         r.translate(r.width()/8.0f,0); // fix gravity
 168         const QPointF points[3] = { r.topLeft(), r.bottomLeft(), QPointF(r.right(), r.y() + r.height()/2.0) };
 169         p.drawConvexPolygon(points, 3);
 170     } else {
 171         r.translate(-r.width()/8.0f,0); // fix gravity
 172         const QPointF points[3] = { r.topRight(), r.bottomRight(), QPointF(r.left(), r.y() + r.height()/2.0) };
 173         p.drawConvexPolygon(points, 3);
 174     }
 175     p.end();
 176 }
 177
 178 }