valentina/src/libs/vwidgets/vgraphicssimpletextitem.cpp

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/************************************************************************
**
** @file vgraphicssimpletextitem.cpp
** @author Roman Telezhynskyi <dismine(at)gmail.com>
** @date November 15, 2013
**
** @brief
** @copyright
** This source code is part of the Valentina project, a pattern making
** program, whose allow create and modeling patterns of clothing.
** Copyright (C) 2013-2015 Valentina project
** <https://bitbucket.org/dismine/valentina> All Rights Reserved.
**
** Valentina is free software: you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation, either version 3 of the License, or
** (at your option) any later version.
**
** Valentina is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with Valentina. If not, see <http://www.gnu.org/licenses/>.
**
*************************************************************************/
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#include "vgraphicssimpletextitem.h"
#include <QEvent>
#include <QFlags>
#include <QFont>
#include <QGraphicsScene>
#include <QGraphicsSceneMouseEvent>
#include <QGraphicsView>
#include <QKeyEvent>
#include <QList>
#include <QMessageLogger>
#include <QPalette>
#include <QPoint>
#include <QPolygonF>
#include <QRectF>
#include <Qt>
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#include "vmaingraphicsscene.h"
#include "vmaingraphicsview.h"
#include "global.h"
#include "vscenepoint.h"
#include "../vmisc/vmath.h"
#include "../vmisc/vabstractapplication.h"
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGraphicsSimpleTextItem default constructor.
* @param parent parent object.
*/
VGraphicsSimpleTextItem::VGraphicsSimpleTextItem(QGraphicsItem * parent)
: QGraphicsSimpleTextItem(parent),
m_fontSize(0),
selectionType(SelectionType::ByMouseRelease),
m_oldScale(1),
m_showParentTooltip(true)
{
Init();
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}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGraphicsSimpleTextItem constructor.
* @param text text.
* @param parent parent object.
*/
VGraphicsSimpleTextItem::VGraphicsSimpleTextItem( const QString & text, QGraphicsItem * parent )
: QGraphicsSimpleTextItem(text, parent),
m_fontSize(0),
selectionType(SelectionType::ByMouseRelease),
m_oldScale(1),
m_showParentTooltip(true)
{
Init();
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}
//---------------------------------------------------------------------------------------------------------------------
void VGraphicsSimpleTextItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
auto UpdateLine = [this]()
{
if (VScenePoint *parent = dynamic_cast<VScenePoint *>(parentItem()))
{
parent->RefreshLine();
}
};
QGraphicsScene *scene = this->scene();
const qreal scale = SceneScale(scene);
if (scale > 1 && not VFuzzyComparePossibleNulls(m_oldScale, scale))
{
setScale(1/scale);
CorrectLabelPosition();
UpdateLine();
m_oldScale = scale;
}
else if (scale <= 1 && not VFuzzyComparePossibleNulls(m_oldScale, 1.0))
{
setScale(1);
CorrectLabelPosition();
UpdateLine();
m_oldScale = 1;
}
if (QGraphicsView *view = scene->views().at(0))
{
VMainGraphicsView::NewSceneRect(scene, view, this);
}
PaintWithFixItemHighlightSelected<QGraphicsSimpleTextItem>(this, painter, option, widget);
}
//---------------------------------------------------------------------------------------------------------------------
void VGraphicsSimpleTextItem::setEnabled(bool enabled)
{
QGraphicsSimpleTextItem::setEnabled(enabled);
const QPalette palet = this->scene()->palette();
if (enabled)
{
setBrush(palet.brush(QPalette::Active, QPalette::Text));
}
else
{
setBrush(palet.brush(QPalette::Disabled, QPalette::Text));
}
}
//---------------------------------------------------------------------------------------------------------------------
void VGraphicsSimpleTextItem::LabelSelectionType(const SelectionType &type)
{
selectionType = type;
}
//---------------------------------------------------------------------------------------------------------------------
void VGraphicsSimpleTextItem::SetShowParentTooltip(bool show)
{
m_showParentTooltip = show;
}
//---------------------------------------------------------------------------------------------------------------------
void VGraphicsSimpleTextItem::SetRealPos(QPointF pos)
{
m_realPos = pos;
CorrectLabelPosition();
}
//---------------------------------------------------------------------------------------------------------------------
void VGraphicsSimpleTextItem::CorrectLabelPosition()
{
const qreal scale = SceneScale(scene());
QPointF newPos = m_realPos;
if (scale > 1)
{
QLineF line(QPointF(), m_realPos);
line.setLength(line.length() / scale);
newPos = line.p2();
}
blockSignals(true);
setFlag(QGraphicsItem::ItemSendsGeometryChanges, false);
setPos(newPos);
setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
blockSignals(false);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief itemChange handle item change.
* @param change change.
* @param value value.
* @return value.
*/
QVariant VGraphicsSimpleTextItem::itemChange(GraphicsItemChange change, const QVariant &value)
{
if (change == ItemPositionChange && scene())
{
// Each time we move something we call recalculation scene rect. In some cases this can cause moving
// objects positions. And this cause infinite redrawing. That's why we wait the finish of saving the last move.
static bool changeFinished = true;
if (changeFinished)
{
changeFinished = false;
if (scene())
{
const QList<QGraphicsView *> viewList = scene()->views();
if (not viewList.isEmpty())
{
if (VMainGraphicsView *view = qobject_cast<VMainGraphicsView *>(viewList.at(0)))
{
const qreal scale = SceneScale(scene());
int xmargin = qCeil(50/scale);
int ymargin = qCeil(50/scale);
const QRectF viewRect = VMainGraphicsView::SceneVisibleArea(view);
const QRectF itemRect = mapToScene(boundingRect()).boundingRect();
// If item's rect is bigger than view's rect ensureVisible works very unstable.
if (itemRect.height() + 2*ymargin < viewRect.height() &&
itemRect.width() + 2*xmargin < viewRect.width())
{
view->EnsureVisibleWithDelay(itemRect, VMainGraphicsView::scrollDelay, xmargin, ymargin);
}
else
{
// Ensure visible only small rect around a cursor
VMainGraphicsScene *currentScene = qobject_cast<VMainGraphicsScene *>(scene());
SCASSERT(currentScene)
const QPointF cursorPosition = currentScene->getScenePos();
view->EnsureVisibleWithDelay(QRectF(cursorPosition.x()-5/scale, cursorPosition.y()-5/scale,
10/scale, 10/scale),
VMainGraphicsView::scrollDelay);
}
}
}
}
m_realPos = value.toPointF();
const qreal scale = SceneScale(scene());
if (scale > 1)
{
QLineF line(QPointF(), m_realPos);
line.setLength(line.length() * scale);
m_realPos = line.p2();
}
emit NameChangePosition(m_realPos + this->parentItem()->pos());
changeFinished = true;
}
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}
if (change == QGraphicsItem::ItemSelectedHasChanged)
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{
setFlag(QGraphicsItem::ItemIsFocusable, value.toBool());
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emit PointSelected(value.toBool());
}
return QGraphicsSimpleTextItem::itemChange(change, value);
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}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief hoverEnterEvent handle hover enter events.
* @param event hover enter event.
*/
void VGraphicsSimpleTextItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
if (flags() & QGraphicsItem::ItemIsMovable)
{
SetItemOverrideCursor(this, cursorArrowOpenHand, 1, 1);
}
else
{
setCursor(qApp->getSceneView()->viewport()->cursor());
}
this->setBrush(Qt::green);
QGraphicsItem *parent = parentItem();
if(parent && m_showParentTooltip)
{
setToolTip(parent->toolTip());
}
QGraphicsSimpleTextItem::hoverEnterEvent(event);
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}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief hoverLeaveEvent handle hover leave events.
* @param event hover leave event.
*/
void VGraphicsSimpleTextItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
this->setBrush(m_baseColor);
QGraphicsSimpleTextItem::hoverLeaveEvent(event);
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}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief contextMenuEvent handle context menu events.
* @param event context menu event.
*/
void VGraphicsSimpleTextItem::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
{
emit ShowContextMenu(event);
}
//---------------------------------------------------------------------------------------------------------------------
void VGraphicsSimpleTextItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
// Special for not selectable item first need to call standard mousePressEvent then accept event
QGraphicsSimpleTextItem::mousePressEvent(event);
// Somehow clicking on notselectable object do not clean previous selections.
if (not (flags() & ItemIsSelectable) && scene())
{
scene()->clearSelection();
}
if (flags() & QGraphicsItem::ItemIsMovable)
{
if (event->button() == Qt::LeftButton && event->type() != QEvent::GraphicsSceneMouseDoubleClick)
{
SetItemOverrideCursor(this, cursorArrowCloseHand, 1, 1);
event->accept();
}
}
if (selectionType == SelectionType::ByMouseRelease)
{
event->accept(); // This help for not selectable items still receive mouseReleaseEvent events
}
else
{
if (event->button() == Qt::LeftButton && event->type() != QEvent::GraphicsSceneMouseDoubleClick)
{
emit PointChoosed();
event->accept();
}
}
}
//---------------------------------------------------------------------------------------------------------------------
void VGraphicsSimpleTextItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
if (flags() & QGraphicsItem::ItemIsMovable)
{
if (event->button() == Qt::LeftButton && event->type() != QEvent::GraphicsSceneMouseDoubleClick)
{
SetItemOverrideCursor(this, cursorArrowOpenHand, 1, 1);
}
}
if (selectionType == SelectionType::ByMouseRelease && IsSelectedByReleaseEvent(this, event))
{
emit PointChoosed();
}
QGraphicsSimpleTextItem::mouseReleaseEvent(event);
}
//---------------------------------------------------------------------------------------------------------------------
void VGraphicsSimpleTextItem::keyReleaseEvent(QKeyEvent *event)
{
switch (event->key())
{
case Qt::Key_Delete:
emit DeleteTool();
return; //Leave this method immediately after call!!!
default:
break;
}
QGraphicsSimpleTextItem::keyReleaseEvent ( event );
}
//---------------------------------------------------------------------------------------------------------------------
QColor VGraphicsSimpleTextItem::BaseColor() const
{
return m_baseColor;
}
//---------------------------------------------------------------------------------------------------------------------
void VGraphicsSimpleTextItem::SetBaseColor(const QColor &baseColor)
{
m_baseColor = baseColor;
setBrush(m_baseColor);
}
//---------------------------------------------------------------------------------------------------------------------
void VGraphicsSimpleTextItem::Init()
{
this->setFlag(QGraphicsItem::ItemIsMovable, true);
this->setFlag(QGraphicsItem::ItemIsSelectable, true);
this->setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
this->setFlag(QGraphicsItem::ItemIsFocusable, true);// For keyboard input focus
this->setAcceptHoverEvents(true);
QFont font = this->font();
font.setPointSize(font.pointSize()+20);
m_fontSize = font.pointSize();
this->setFont(font);
m_oldScale = minVisibleFontSize / m_fontSize;
setScale(m_oldScale);
}