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 #include <QKeyEvent>
  24
  25 KItemListRoleEditor::KItemListRoleEditor(QWidget *parent) :
  26     KTextEdit(parent),
  27     m_role(),
  28     m_blockFinishedSignal(false)
  29 {
  30     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  31     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  32     setAcceptRichText(false);
  33     enableFindReplace(false);
  34     document()->setDocumentMargin(0);
  35
  36     if (parent) {
  37         parent->installEventFilter(this);
  38     }
  39
  40     connect(this, &KItemListRoleEditor::textChanged, this, &KItemListRoleEditor::autoAdjustSize);
  41 }
  42
  43 KItemListRoleEditor::~KItemListRoleEditor()
  44 {
  45 }
  46
  47 void KItemListRoleEditor::setRole(const QByteArray& role)
  48 {
  49     m_role = role;
  50 }
  51
  52 QByteArray KItemListRoleEditor::role() const
  53 {
  54     return m_role;
  55 }
  56
  57 bool KItemListRoleEditor::eventFilter(QObject* watched, QEvent* event)
  58 {
  59     if (watched == parentWidget() && event->type() == QEvent::Resize) {
  60         emitRoleEditingFinished();
  61     }
  62
  63     return KTextEdit::eventFilter(watched, event);
  64 }
  65
  66 bool KItemListRoleEditor::event(QEvent* event)
  67 {
  68     if (event->type() == QEvent::FocusOut) {
  69         QFocusEvent* focusEvent = static_cast<QFocusEvent*>(event);
  70         if (focusEvent->reason() != Qt::PopupFocusReason) {
  71             emitRoleEditingFinished();
  72         }
  73     }
  74     return KTextEdit::event(event);
  75 }
  76
  77 void KItemListRoleEditor::keyPressEvent(QKeyEvent* event)
  78 {
  79     switch (event->key()) {
  80     case Qt::Key_Escape:
  81         // Emitting the signal roleEditingCanceled might result
  82         // in losing the focus. Per default losing the focus emits
  83         // a roleEditingFinished signal (see KItemListRoleEditor::event),
  84         // which is not wanted in this case.
  85         m_blockFinishedSignal = true;
  86         emit roleEditingCanceled(m_role, KIO::encodeFileName(toPlainText()));
  87         m_blockFinishedSignal = false;
  88         event->accept();
  89         return;
  90     case Qt::Key_Enter:
  91     case Qt::Key_Return:
  92         emitRoleEditingFinished();
  93         event->accept();
  94         return;
  95     case Qt::Key_Left:
  96     case Qt::Key_Right: {
  97         QTextCursor cursor = textCursor();
  98         if (event->modifiers() == Qt::NoModifier && cursor.hasSelection()) {
  99             if (event->key() == Qt::Key_Left) {
 100                 cursor.setPosition(cursor.selectionStart());
 101             } else {
 102                 cursor.setPosition(cursor.selectionEnd());
 103             }
 104             cursor.clearSelection();
 105             setTextCursor(cursor);
 106             event->accept();
 107             return;
 108         }
 109         break;
 110     }
 111     default:
 112         break;
 113     }
 114
 115     KTextEdit::keyPressEvent(event);
 116 }
 117
 118 void KItemListRoleEditor::autoAdjustSize()
 119 {
 120     const qreal frameBorder = 2 * frameWidth();
 121
 122     const qreal requiredWidth = document()->size().width();
 123     const qreal availableWidth = size().width() - frameBorder;
 124     if (requiredWidth > availableWidth) {
 125         qreal newWidth = requiredWidth + frameBorder;
 126         if (parentWidget() && pos().x() + newWidth > parentWidget()->width()) {
 127             newWidth = parentWidget()->width() - pos().x();
 128         }
 129         resize(newWidth, size().height());
 130     }
 131
 132     const qreal requiredHeight = document()->size().height();
 133     const qreal availableHeight = size().height() - frameBorder;
 134     if (requiredHeight > availableHeight) {
 135         qreal newHeight = requiredHeight + frameBorder;
 136         if (parentWidget() && pos().y() + newHeight > parentWidget()->height()) {
 137             newHeight = parentWidget()->height() - pos().y();
 138         }
 139         resize(size().width(), newHeight);
 140     }
 141 }
 142
 143 void KItemListRoleEditor::emitRoleEditingFinished()
 144 {
 145     if (!m_blockFinishedSignal) {
 146         emit roleEditingFinished(m_role, KIO::encodeFileName(toPlainText()));
 147     }
 148 }
 149