Simple element : Comment is show at the bottom of diagram inside a rounded rectangle.

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@3407 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/qetgraphicsitem/commentitem.cpp

@@ -0,0 +1,113 @@
+/*
+	Copyright 2006-2014 The QElectroTech Team
+	This file is part of QElectroTech.
+
+	QElectroTech 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 2 of the License, or
+	(at your option) any later version.
+
+	QElectroTech 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 QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "commentitem.h"
+#include "element.h"
+#include "qetapp.h"
+#include "diagram.h"
+#include <QPainter>
+
+/**
+ * @brief CommentItem::CommentItem
+ * @param elmt : the element to display comment,
+ * element is also the parent item of this item
+ */
+CommentItem::CommentItem(Element *elmt) :
+	QGraphicsObject(elmt),
+	m_element (elmt)
+{
+	updateLabel();
+	connect(elmt, SIGNAL(yChanged()),                        this, SLOT (autoPos()));
+	connect(elmt, SIGNAL(rotationChanged()),                 this, SLOT (autoPos()));
+	connect(elmt, SIGNAL(elementInfoChange(DiagramContext)), this, SLOT (updateLabel()));
+}
+
+/**
+ * @brief CommentItem::boundingRect
+ * @return the bounding rect of this item
+ */
+QRectF CommentItem::boundingRect() const {
+	return m_bounding_rect;
+}
+
+/**
+ * @brief CommentItem::autoPos
+ * Adjust the position of this item.
+ */
+void CommentItem::autoPos() {
+	if(!m_element -> diagram()) return;
+
+	QRectF  border = m_element -> diagram() -> border();
+	QPointF point  = m_element -> sceneBoundingRect().center();
+
+	point.setY(border.height() - m_element -> diagram() -> border_and_titleblock.titleBlockHeight() - boundingRect().height());
+	point.rx() -= (m_bounding_rect.width()/2 + m_bounding_rect.left()); //< we add boundingrect.left because this value can be négative
+
+	setPos(0,0);	//Due to a weird behavior or bug, before set the new position and rotation,
+	setRotation(0); //we must to set the position and rotation at 0.
+	setPos(mapFromScene(point));
+	if (rotation() != - m_element -> rotation()) {
+		setRotation(0);
+		setRotation(- m_element -> rotation());
+	}
+}
+
+/**
+ * @brief CommentItem::paint
+ * Paint this item
+ * @param painter
+ * @param option
+ * @param widget
+ */
+void CommentItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
+	Q_UNUSED(option); Q_UNUSED(widget);
+	m_picture.play(painter);
+}
+
+/**
+ * @brief CommentItem::updateLabel
+ * update the content of this item
+ * (draw this item in a QPicture)
+ */
+void CommentItem::updateLabel() {
+	QString comment = m_element -> elementInformations()["comment"].toString();
+	bool    show    = m_element -> elementInformations().keyMustShow("comment");
+
+	if (comment == m_comment && show == m_show) return;
+
+	m_comment = comment;
+	m_show    = show;
+
+	QPen pen(Qt::black);
+		 pen.setWidthF (0.5);
+
+	QPainter painter(&m_picture);
+			 painter.setPen  (pen);
+			 painter.setFont (QETApp::diagramTextsFont(6));
+
+	QRectF drawing_rect(QPointF(0,0), QSizeF(100, 100));
+	QRectF text_bounding;
+
+	painter.drawText(drawing_rect, Qt::TextWordWrap | Qt::AlignHCenter, m_comment, &text_bounding);
+
+	text_bounding.adjust(-1,0,1,0); //adjust only for better visual
+	painter.drawRoundedRect(text_bounding, 2, 2);
+
+	m_bounding_rect = text_bounding;
+
+	autoPos();
+}

sources/qetgraphicsitem/commentitem.h

@@ -0,0 +1,57 @@
+/*
+	Copyright 2006-2014 The QElectroTech Team
+	This file is part of QElectroTech.
+
+	QElectroTech 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 2 of the License, or
+	(at your option) any later version.
+
+	QElectroTech 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 QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef COMMENTITEM_H
+#define COMMENTITEM_H
+
+#include <QGraphicsObject>
+#include <QPicture>
+
+class Element;
+
+/**
+ * @brief The CommentItem class
+ * This item display the comment of an element
+ * at the bottom of element diagram in a rounded rect
+ */
+class CommentItem : public QGraphicsObject
+{
+		Q_OBJECT
+	public:
+		explicit CommentItem(Element *elmt);
+
+		virtual QRectF boundingRect() const;
+
+	signals:
+
+	public slots:
+		void autoPos();
+		void updateLabel();
+
+	protected:
+		virtual void paint (QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
+
+	private:
+		Element *m_element;
+		QPicture m_picture;
+		QRectF   m_bounding_rect;
+		QString  m_comment;
+		bool     m_show;
+
+};
+
+#endif // COMMENTITEM_H

sources/qetgraphicsitem/simpleelement.cpp

@@ -16,6 +16,7 @@
 	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
 */
 #include "simpleelement.h"
+#include "commentitem.h"
 /**
  * @brief SimpleElement::SimpleElement
  * @param location
@@ -24,7 +25,8 @@
  * @param state
  */
 SimpleElement::SimpleElement(const ElementsLocation &location, QGraphicsItem *qgi, Diagram *s, int *state) :
-	CustomElement(location, qgi, s, state)
+	CustomElement(location, qgi, s, state),
+	m_comment_item (nullptr)
 {
 	link_type_ = Simple;
 	connect(this, SIGNAL(elementInfoChange(DiagramContext)), this, SLOT(updateLabel()));
@@ -35,6 +37,12 @@ SimpleElement::SimpleElement(const ElementsLocation &location, QGraphicsItem *qg
  */
 SimpleElement::~SimpleElement() {
 	disconnect(this, SIGNAL(elementInfoChange(DiagramContext)), this, SLOT(updateLabel()));
+	if (m_comment_item) delete m_comment_item;
+}
+
+void SimpleElement::initLink(QETProject *project) {
+	CustomElement::initLink(project);
+	updateLabel();
 }
 
 /**
@@ -42,6 +50,7 @@ SimpleElement::~SimpleElement() {
  * update label of this element
  */
 void SimpleElement::updateLabel() {
+	//Label of element
 	QString label = elementInformations()["label"].toString();
 	bool	show  = elementInformations().keyMustShow("label");
 
@@ -49,4 +58,16 @@ void SimpleElement::updateLabel() {
 	(label.isEmpty() || !show)?
 				setTaggedText("label", "_", false):
 				setTaggedText("label", label, true);
+
+	//Comment of element
+	QString comment   = elementInformations()["comment"].toString();
+	bool    must_show = elementInformations().keyMustShow("comment");
+
+	if (!(comment.isEmpty() || !must_show) && !m_comment_item) {
+		m_comment_item = new CommentItem(this);
+	}
+	else if ((comment.isEmpty() || !must_show) && m_comment_item) {
+		delete m_comment_item;
+		m_comment_item = nullptr;
+	}
 }

sources/qetgraphicsitem/simpleelement.h

@@ -20,6 +20,9 @@
 
 #include "customelement.h"
 
+class CommentItem;
+class QETProject;
+
 /**
  * @brief The SimpleElement class
  *this class represente a simple element with no specific attribute
@@ -32,11 +35,16 @@ class SimpleElement : public CustomElement {
 		explicit SimpleElement(const ElementsLocation &, QGraphicsItem * = 0, Diagram * = 0, int * = 0);
 		~SimpleElement();
 
+		virtual void initLink(QETProject *project);
+
 	signals:
 
 	public slots:
 		void updateLabel();
 
+	private:
+		CommentItem *m_comment_item;
+
 };
 
 #endif // SIMPLEELEMENT_H