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 <KDebug>
  23 #include <kio/global.h>
  24 #include <QKeyEvent>
  25
  26 KItemListRoleEditor::KItemListRoleEditor(QWidget *parent) :
  27     KTextEdit(parent),
  28     m_role(),
  29     m_blockFinishedSignal(false)
  30 {
  31     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  32     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  33     setAcceptRichText(false);
  34     enableFindReplace(false);
  35     document()->setDocumentMargin(0);
  36
  37     if (parent) {
  38         parent->installEventFilter(this);
  39     }
  40
  41     connect(this, &KItemListRoleEditor::textChanged, this, &KItemListRoleEditor::autoAdjustSize);
  42 }
  43
  44 KItemListRoleEditor::~KItemListRoleEditor()
  45 {
  46 }
  47
  48 void KItemListRoleEditor::setRole(const QByteArray& role)
  49 {
  50     m_role = role;
  51 }
  52
  53 QByteArray KItemListRoleEditor::role() const
  54 {
  55     return m_role;
  56 }
  57
  58 bool KItemListRoleEditor::eventFilter(QObject* watched, QEvent* event)
  59 {
  60     if (watched == parentWidget() && event->type() == QEvent::Resize) {
  61         emitRoleEditingFinished();
  62     }
  63
  64     return KTextEdit::eventFilter(watched, event);
  65 }
  66
  67 bool KItemListRoleEditor::event(QEvent* event)
  68 {
  69     if (event->type() == QEvent::FocusOut) {
  70         QFocusEvent* focusEvent = static_cast<QFocusEvent*>(event);
  71         if (focusEvent->reason() != Qt::PopupFocusReason) {
  72             emitRoleEditingFinished();
  73         }
  74     }
  75     return KTextEdit::event(event);
  76 }
  77
  78 void KItemListRoleEditor::keyPressEvent(QKeyEvent* event)
  79 {
  80     switch (event->key()) {
  81     case Qt::Key_Escape:
  82         // Emitting the signal roleEditingCanceled might result
  83         // in losing the focus. Per default losing the focus emits
  84         // a roleEditingFinished signal (see KItemListRoleEditor::event),
  85         // which is not wanted in this case.
  86         m_blockFinishedSignal = true;
  87         emit roleEditingCanceled(m_role, KIO::encodeFileName(toPlainText()));
  88         m_blockFinishedSignal = false;
  89         event->accept();
  90         return;
  91     case Qt::Key_Enter:
  92     case Qt::Key_Return:
  93         emitRoleEditingFinished();
  94         event->accept();
  95         return;
  96     case Qt::Key_Left:
  97     case Qt::Key_Right: {
  98         QTextCursor cursor = textCursor();
  99         if (event->modifiers() == Qt::NoModifier && cursor.hasSelection()) {
 100             if (event->key() == Qt::Key_Left) {
 101                 cursor.setPosition(cursor.selectionStart());
 102             } else {
 103                 cursor.setPosition(cursor.selectionEnd());
 104             }
 105             cursor.clearSelection();
 106             setTextCursor(cursor);
 107             event->accept();
 108             return;
 109         }
 110         break;
 111     }
 112     default:
 113         break;
 114     }
 115
 116     KTextEdit::keyPressEvent(event);
 117 }
 118
 119 void KItemListRoleEditor::autoAdjustSize()
 120 {
 121     const qreal frameBorder = 2 * frameWidth();
 122
 123     const qreal requiredWidth = document()->size().width();
 124     const qreal availableWidth = size().width() - frameBorder;
 125     if (requiredWidth > availableWidth) {
 126         qreal newWidth = requiredWidth + frameBorder;
 127         if (parentWidget() && pos().x() + newWidth > parentWidget()->width()) {
 128             newWidth = parentWidget()->width() - pos().x();
 129         }
 130         resize(newWidth, size().height());
 131     }
 132
 133     const qreal requiredHeight = document()->size().height();
 134     const qreal availableHeight = size().height() - frameBorder;
 135     if (requiredHeight > availableHeight) {
 136         qreal newHeight = requiredHeight + frameBorder;
 137         if (parentWidget() && pos().y() + newHeight > parentWidget()->height()) {
 138             newHeight = parentWidget()->height() - pos().y();
 139         }
 140         resize(size().width(), newHeight);
 141     }
 142 }
 143
 144 void KItemListRoleEditor::emitRoleEditingFinished()
 145 {
 146     if (!m_blockFinishedSignal) {
 147         emit roleEditingFinished(m_role, KIO::encodeFileName(toPlainText()));
 148     }
 149 }
 150