ScxmlEditor: Initial import

Change-Id: I4701b77ebd4e2520f2616c42206ac17be3a12b60
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

src/plugins/scxmleditor/plugin_interface/textitem.cpp

@@ -0,0 +1,194 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "textitem.h"
+#include <QCursor>
+#include <QGraphicsScene>
+#include <QGraphicsSceneMouseEvent>
+#include <QPainter>
+#include <QTextCursor>
+#include <QTextDocument>
+#include <QTextOption>
+#include <qmath.h>
+
+using namespace ScxmlEditor::PluginInterface;
+
+TextItem::TextItem(QGraphicsItem *parent)
+    : QGraphicsTextItem(parent)
+{
+    init();
+}
+
+TextItem::TextItem(const QString &id, QGraphicsItem *parent)
+    : QGraphicsTextItem(id, parent)
+{
+    init();
+}
+
+void TextItem::init()
+{
+    setTextInteractionFlags(Qt::TextEditorInteraction);
+    setFlag(ItemIsSelectable, true);
+    setFlag(ItemIsFocusable, true);
+
+    QTextOption options;
+    options.setWrapMode(QTextOption::NoWrap);
+    options.setAlignment(Qt::AlignCenter);
+    document()->setDefaultTextOption(options);
+
+    connect(document(), &QTextDocument::contentsChanged, this, &TextItem::checkText);
+
+    QFont f = font();
+    f.setPixelSize(13);
+    setFont(f);
+}
+
+void TextItem::setItalic(bool ital)
+{
+    QFont f = font();
+    f.setItalic(ital);
+    setFont(f);
+}
+
+void TextItem::checkText()
+{
+    if (document()->textWidth() <= 40)
+        document()->setTextWidth(40);
+    else
+        document()->setTextWidth(-1);
+
+    emit textChanged();
+}
+
+void TextItem::setText(const QString &t)
+{
+    blockSignals(true);
+    setPlainText(t);
+    blockSignals(false);
+}
+
+void TextItem::focusInEvent(QFocusEvent *event)
+{
+    QGraphicsTextItem::focusInEvent(event);
+    emit selected(true);
+}
+
+void TextItem::focusOutEvent(QFocusEvent *event)
+{
+    emit textReady(toPlainText());
+    QGraphicsTextItem::focusOutEvent(event);
+}
+
+void TextItem::keyPressEvent(QKeyEvent *event)
+{
+    switch (event->key()) {
+    case Qt::Key_Escape:
+    case Qt::Key_Enter:
+    case Qt::Key_Return:
+    case Qt::Key_Tab:
+        event->accept();
+        clearFocus();
+        return;
+    default:
+        break;
+    }
+
+    QGraphicsTextItem::keyPressEvent(event);
+}
+
+bool TextItem::needIgnore(const QPointF sPos) const
+{
+    // If we found QuickTransition-item or CornerGrabber at this point, we must ignore mouse press here
+    // So we can press QuickTransition/CornerGrabber item although there is transition lines front of these items
+    foreach (QGraphicsItem *item, scene()->items(sPos)) {
+        if (item->type() == QuickTransitionType || (item->type() == CornerGrabberType && item->parentItem() != this))
+            return true;
+    }
+
+    return false;
+}
+
+void TextItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (needIgnore(event->scenePos())) {
+        event->ignore();
+        return;
+    }
+
+    QGraphicsTextItem::mousePressEvent(event);
+    setFocus();
+}
+
+void TextItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (needIgnore(event->scenePos())) {
+        event->ignore();
+        return;
+    }
+
+    QGraphicsTextItem::mouseReleaseEvent(event);
+    setFocus();
+}
+
+void TextItem::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (needIgnore(event->scenePos())) {
+        event->ignore();
+        return;
+    }
+
+    setFocus();
+    QGraphicsTextItem::mouseDoubleClickEvent(event);
+    emit selected(true);
+}
+
+void TextItem::hoverEnterEvent(QGraphicsSceneHoverEvent *e)
+{
+    if (needIgnore(e->scenePos())) {
+        e->ignore();
+        return;
+    }
+
+    setCursor(Qt::IBeamCursor);
+    QGraphicsTextItem::hoverEnterEvent(e);
+}
+
+void TextItem::hoverMoveEvent(QGraphicsSceneHoverEvent *e)
+{
+    if (needIgnore(e->scenePos())) {
+        setCursor(Qt::ArrowCursor);
+        e->ignore();
+        return;
+    }
+
+    setCursor(Qt::IBeamCursor);
+    QGraphicsTextItem::hoverEnterEvent(e);
+}
+
+void TextItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *e)
+{
+    setCursor(Qt::ArrowCursor);
+    QGraphicsTextItem::hoverLeaveEvent(e);
+}