Began implementing a WYSIWYG title block template editor.

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/branches/0.3@1405 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/titleblock/templatevisualcell.cpp

@@ -0,0 +1,136 @@
+/*
+	Copyright 2006-2011 Xavier Guerrin
+	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 "templatevisualcell.h"
+#include "titleblocktemplate.h"
+#include "diagramcontext.h"
+
+/**
+	Constructor
+	@param parent Parent QGraphicsItem
+*/
+TitleBlockTemplateVisualCell::TitleBlockTemplateVisualCell(QGraphicsItem *parent) :
+	QGraphicsLayoutItem(),
+	QGraphicsItem(parent),
+	template_(0),
+	cell_(0)
+{
+	setGraphicsItem(this);
+	setFlag(QGraphicsItem::ItemIsSelectable, true);
+	
+}
+
+/**
+	Destructor
+*/
+TitleBlockTemplateVisualCell::~TitleBlockTemplateVisualCell() {
+}
+
+/**
+	Ensure geometry changes are handled for both QGraphicsObject and
+	QGraphicsLayoutItem.
+	@param g New geometry
+*/
+void TitleBlockTemplateVisualCell::setGeometry(const QRectF &g) {
+	prepareGeometryChange();
+	QGraphicsLayoutItem::setGeometry(g);
+	setPos(g.topLeft());
+}
+
+/**
+	@param which Size hint to be modified
+	@param constraint New value for the size hint
+	@return the size hint for \a which using the width or height of \a constraint
+*/
+QSizeF TitleBlockTemplateVisualCell::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const {
+	Q_UNUSED(which);
+	return constraint;
+}
+
+/**
+	@return the bounding rect of this helper cell
+*/
+QRectF TitleBlockTemplateVisualCell::boundingRect() const {
+	return QRectF(QPointF(0,0), geometry().size());
+}
+
+/**
+	Handles the helper cell visual rendering
+	@param painter QPainter to be used for the rendering
+	@param option Rendering options
+	@param widget QWidget being painted, if any
+*/
+void TitleBlockTemplateVisualCell::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
+	Q_UNUSED(option);
+	Q_UNUSED(widget);
+	
+	QRectF drawing_rectangle(QPointF(0, 0), geometry().size() /*- QSizeF(1, 1)*/);
+	
+	if (template_ && cell_) {
+		template_ -> renderCell(*painter, *cell_, DiagramContext(), drawing_rectangle.toRect());
+	}
+	if (isSelected()) {
+		QBrush selection_brush = QApplication::palette().highlight();
+		QColor selection_color = selection_brush.color();
+		selection_color.setAlpha(127);
+		selection_brush.setColor(selection_color);
+		painter -> setPen(Qt::NoPen);
+		painter -> setBrush(selection_brush);
+		painter -> drawRect(drawing_rectangle/*.adjusted(1, 1, -1, -1)*/);
+	}
+}
+
+/**
+	Set the previewed title block cell.
+	@param tbt Parent title block template of the previewed cell
+	@param cell Previewed cell
+*/
+void TitleBlockTemplateVisualCell::setTemplateCell(TitleBlockTemplate *tbt, TitleBlockCell *cell) {
+	template_ = tbt;
+	cell_     = cell;
+}
+
+/**
+	@return the parent title block template of the previewed cell
+*/
+TitleBlockTemplate *TitleBlockTemplateVisualCell::titleBlockTemplate() const {
+	return(template_);
+}
+
+/**
+	@return the previewed title block cell
+*/
+TitleBlockCell *TitleBlockTemplateVisualCell::cell() const {
+	return(cell_);
+}
+
+/**
+	@return the title block cell previewed by this object, plus the cells it
+	spans over, if any
+*/
+QSet<TitleBlockCell *> TitleBlockTemplateVisualCell::cells() const {
+	QSet<TitleBlockCell *> set;
+	if (cell_) {
+		if (template_) {
+			set = template_ -> spannedCells(cell_);
+		}
+		
+		// the TitleBlockCell rendered by this object
+		set << cell_;
+	}
+	return(set);
+}