src/kitemviews/private/kitemlistroleeditor.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2012 by Peter Penz <peter.penz19@gmail.com>             *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
  18  ***************************************************************************/
  19
  20 #include "kitemlistroleeditor.h"
  21
  22 #include <KIO/Global>
  23
  24 KItemListRoleEditor::KItemListRoleEditor(QWidget *parent) :
  25     KTextEdit(parent),
  26     m_role(),
  27     m_blockFinishedSignal(false)
  28 {
  29     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  30     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  31     setAcceptRichText(false);
  32     enableFindReplace(false);
  33     document()->setDocumentMargin(0);
  34
  35     if (parent) {
  36         parent->installEventFilter(this);
  37     }
  38
  39     connect(this, &KItemListRoleEditor::textChanged, this, &KItemListRoleEditor::autoAdjustSize);
  40 }
  41
  42 KItemListRoleEditor::~KItemListRoleEditor()
  43 {
  44 }
  45
  46 void KItemListRoleEditor::setRole(const QByteArray& role)
  47 {
  48     m_role = role;
  49 }
  50
  51 QByteArray KItemListRoleEditor::role() const
  52 {
  53     return m_role;
  54 }
  55
  56 bool KItemListRoleEditor::eventFilter(QObject* watched, QEvent* event)
  57 {
  58     if (watched == parentWidget() && event->type() == QEvent::Resize) {
  59         emitRoleEditingFinished();
  60     }
  61
  62     return KTextEdit::eventFilter(watched, event);
  63 }
  64
  65 bool KItemListRoleEditor::event(QEvent* event)
  66 {
  67     if (event->type() == QEvent::FocusOut) {
  68         QFocusEvent* focusEvent = static_cast<QFocusEvent*>(event);
  69         if (focusEvent->reason() != Qt::PopupFocusReason) {
  70             emitRoleEditingFinished();
  71         }
  72     }
  73     return KTextEdit::event(event);
  74 }
  75
  76 void KItemListRoleEditor::keyPressEvent(QKeyEvent* event)
  77 {
  78     switch (event->key()) {
  79     case Qt::Key_Escape:
  80         // Emitting the signal roleEditingCanceled might result
  81         // in losing the focus. Per default losing the focus emits
  82         // a roleEditingFinished signal (see KItemListRoleEditor::event),
  83         // which is not wanted in this case.
  84         m_blockFinishedSignal = true;
  85         emit roleEditingCanceled(m_role, KIO::encodeFileName(toPlainText()));
  86         m_blockFinishedSignal = false;
  87         event->accept();
  88         return;
  89     case Qt::Key_Enter:
  90     case Qt::Key_Return:
  91         emitRoleEditingFinished();
  92         event->accept();
  93         return;
  94     case Qt::Key_Left:
  95     case Qt::Key_Right: {
  96         QTextCursor cursor = textCursor();
  97         if (event->modifiers() == Qt::NoModifier && cursor.hasSelection()) {
  98             if (event->key() == Qt::Key_Left) {
  99                 cursor.setPosition(cursor.selectionStart());
 100             } else {
 101                 cursor.setPosition(cursor.selectionEnd());
 102             }
 103             cursor.clearSelection();
 104             setTextCursor(cursor);
 105             event->accept();
 106             return;
 107         }
 108         break;
 109     }
 110     case Qt::Key_Home:
 111     case Qt::Key_End: {
 112         if (event->modifiers() == Qt::NoModifier || event->modifiers() == Qt::ShiftModifier) {
 113             const QTextCursor::MoveOperation op = event->key() == Qt::Key_Home
 114                                                 ? QTextCursor::Start
 115                                                 : QTextCursor::End;
 116             const QTextCursor::MoveMode mode = event->modifiers() == Qt::NoModifier
 117                                              ? QTextCursor::MoveAnchor
 118                                              : QTextCursor::KeepAnchor;
 119             QTextCursor cursor = textCursor();
 120             cursor.movePosition(op, mode);
 121             setTextCursor(cursor);
 122             event->accept();
 123             return;
 124         }
 125         break;
 126     }
 127     default:
 128         break;
 129     }
 130
 131     KTextEdit::keyPressEvent(event);
 132 }
 133
 134 void KItemListRoleEditor::autoAdjustSize()
 135 {
 136     const qreal frameBorder = 2 * frameWidth();
 137
 138     const qreal requiredWidth = document()->size().width();
 139     const qreal availableWidth = size().width() - frameBorder;
 140     if (requiredWidth > availableWidth) {
 141         qreal newWidth = requiredWidth + frameBorder;
 142         if (parentWidget() && pos().x() + newWidth > parentWidget()->width()) {
 143             newWidth = parentWidget()->width() - pos().x();
 144         }
 145         resize(newWidth, size().height());
 146     }
 147
 148     const qreal requiredHeight = document()->size().height();
 149     const qreal availableHeight = size().height() - frameBorder;
 150     if (requiredHeight > availableHeight) {
 151         qreal newHeight = requiredHeight + frameBorder;
 152         if (parentWidget() && pos().y() + newHeight > parentWidget()->height()) {
 153             newHeight = parentWidget()->height() - pos().y();
 154         }
 155         resize(size().width(), newHeight);
 156     }
 157 }
 158
 159 void KItemListRoleEditor::emitRoleEditingFinished()
 160 {
 161     if (!m_blockFinishedSignal) {
 162         emit roleEditingFinished(m_role, KIO::encodeFileName(toPlainText()));
 163     }
 164 }
 165